WebSVN – wimsdev – Blame – /trunk/wims/src/Misc/canvasdraw/canvasdraw.c

Rev	Author	Line No.	Line
15111	schaersvoo	1	/*27/7/2013 version 0.01
7614	schaersvoo	2	"Inspired" by FLY program: http://martin.gleeson.com/fly
		3	*********************************************************************************
18552	bpr	4	* J.M. Evers 7/2013 *
		5	* This is all just amateur scriblings... So no copyrights. *
		6	* This source code file, and compiled objects derived from it, *
		7	* can be used and distributed without restriction, including for commercial use *
		8	* No warrenty whatsoever *
7614	schaersvoo	9	*********************************************************************************
		10	*/
18552	bpr	11	#define VERSION "0.5"
18104	georgesk	12
		13	#define _GNU_SOURCE
		14	#include <string.h>
		15
7848	bpr	16	#include "canvasdraw.h"
15348	bpr	17	void *tmp_buffer;
18552	bpr	18	FILE *js_include_file;
7614	schaersvoo	19	/******************************************************************************
		20	** Internal Functions
		21	******************************************************************************/
18552	bpr	22	void add_to_buffer(char tmp); / add tmp_buffer to the buffer */
		23	void sync_input(FILE infile);/ proceed with inputfile */
		24	void reset();/* reset some global variables like "use_filled", "use_dashed" */
		25	int get_token(FILE infile); / read next char until EOL*/
18606	bpr	26
18552	bpr	27	int x2px(double x);
		28	int y2px(double y);
18606	bpr	29
18552	bpr	30	double px2x(int x);
		31	double px2y(int y);
		32	double get_real(FILE infile,int last); / read a value; calculation and symbols allowed */
		33	char str_replace ( const char word, const char sub_word, const char rep_word );
		34	char get_color(FILE infile,int last); /* read hex-color or colorname -> hex */
		35	char get_string(FILE infile,int last); /* get the string at the end of a command */
		36	char get_string_argument(FILE infile,int last); /* the same, but with "comma" as separator */
18558	bpr	37	int hypgeodaux(double q, double res, int full);
18552	bpr	38	char convert_hex2rgb(char hexcolor);
		39	void make_js_include(int canvas_root_id);
		40	void check_string_length(int length);/* checks if the length of string argument of command is correct */
		41	FILE *js_include_file;
		42	FILE get_file(int line_number, char **filename);
		43	FILE infile; / will be stdin */
7614	schaersvoo	44	/******************************************************************************
		45	** global
		46	******************************************************************************/
		47	int finished = FALSE;/* main variable for signalling the end of the fly-script ; if finished = 1 ; write to stdout or canvasz */
		48	int line_number = 1;/* used in canvas_error() ; keep track of line number in canvasdraw/fly - script */
		49	/* set some variables to avoid trouble (NaN) in case of syntax and other usage errors */
		50	int xsize = 320;
		51	int ysize = 320;
		52	double xmin = 0.0;
		53	double xmax = 320.0;
		54	double ymin = 0.0;
		55	double ymax = 320.0;
11893	schaersvoo	56	double tmax = 0;
		57	double tmin = 0;
7614	schaersvoo	58	/* flag to indicate parsing of line status */
8224	bpr	59	int done = FALSE;
7614	schaersvoo	60	int type; /* eg command number */
15111	schaersvoo	61	int onclick = 0;
		62	/*
15116	bpr	63
		64	1 = onclick ;
		65	2 = draggable ;
		66	3 = click+slideable ;
		67	4 = slideable without click
15111	schaersvoo	68	5 = draggable + slideable
		69	*/
14208	schaersvoo	70	char *slider_type="0";
15111	schaersvoo	71	char *my_sliders = "[-1]";
		72	int use_slider = -1;
		73	int last_slider = 0;
		74	double double_data[MAX_INT+1];
		75	int int_data[MAX_INT+1];
		76	int dragstuff[MAX_DRAGSTUFF];
		77	int js_function[MAX_JS_FUNCTIONS]; /* javascript functions include objects on demand basis: only once per object type */
		78	double affine_matrix[] = {1,0,0,1,0,0};
7785	schaersvoo	79	int use_affine = FALSE;
7614	schaersvoo	80	int use_rotate = FALSE;
14078	bpr	81	int use_filled = 0; /* 0:no fill, 1:fill,2=grid?,3=hatch?,4=diamond?,5=dot?,6=image? */
		82	int use_dashed = FALSE; /* dashing not natively supported in firefox, for now... */
15111	schaersvoo	83	double angle = 0.0;
7614	schaersvoo	84	char buffer[MAX_BUFFER];/* contains js-functions with arguments ... all other basic code is directly printed into js-include file */
9329	schaersvoo	85	char *getfile_cmd = "";
15111	schaersvoo	86	int reply_format = 0;
		87	unsigned int canvas_root_id;
		88	char *css_class;
		89	int font_size;
		90	char *draw_type;
		91	int jsplot_cnt = -1; /* keepint track on the curve identity */
		92	int input_cnt = 0;
		93	int dashtype[2] = { 4 , 4 }; /* just line_px and space_px: may have more arguments...if needed in future */
		94	char *function_label = "[\"f(x)=\",\"g(x)=\",\"h(x)=\"]";
		95	int drag_type = -1;/* 0,1,2: xy,x,y */
		96	int use_offset = 0;/* use_offset only for text shape objects... 0=none;1=yoffset;2=xoffset;3=xyoffset;4=centered*/
		97	int linegraph_cnt = 0; /* identifier for command 'linegraph' ; multiple line graphs may be plotted in a single plot*/
		98	int barchart_cnt = 0; /* identifier for command 'barchart' ; multiple charts may be plotted in a single plot*/
		99	int legend_cnt = -1; /* to allow multiple legends to be used, for multiple piecharts etc */
		100	int use_axis = FALSE;
		101	int use_axis_numbering = -1;
		102	int no_reset = FALSE;
		103
7614	schaersvoo	104	/******************************************************************************
		105	** Main Program
		106	******************************************************************************/
		107	int main(int argc, char *argv[]){
18552	bpr	108	/* need unique id for every call to canvasdraw: rand(); is too slow...will result in many identical id's */
		109	struct timeval tv;struct timezone tz;gettimeofday(&tv, &tz);
		110	canvas_root_id = (unsigned int) tv.tv_usec;
		111	infile = stdin;/* read flyscript via stdin */
		112	int i,c;
		113	for(i=0;i<MAX_DRAGSTUFF;i++){dragstuff[i] = 0;}
		114	for(i=0;i<MAX_INT;i++){int_data[i]=0;double_data[i]=0;}
		115	int use_snap = 0; /* 0 = none 1=grid: 2=x-grid: 3=y-grid: 4=snap to points */
		116	int print_drag_params_only_once = FALSE;/* avoid multiple useless identical lines about javascript precision and use_dragdrop */
18589	bpr	117	int line_width = 2;
18552	bpr	118	int decimals = 2;
		119	int use_dragstuff = 0;
		120	int precision = 100; /* 10 = 1;100=2;1000=3 decimal display for mouse coordinates or grid coordinate.May be redefined before every object */
		121	int use_userdraw = 0; /* 0=none,1=userdraw,2=multidraw flag to indicate user interaction */
		122	int use_tooltip = -1; /* 1= tooltip 2= popup window*/
		123	int use_parametric = FALSE;/* will be reset after parametric plotting */
		124	char *tooltip_text = "Click here";
		125	char temp = ""; / */
		126	char bgcolor = "";/ used for background of canvas_div ; default is tranparent */
		127	char *stroke_color = "255,0,0";
		128	char *fill_color = "255,255,255";
		129	char font_family = "12px Arial"; / commands xaxistext,yaxistext,legend,text/textup/string/stringup may us this */
		130	char *font_color = "#00000";
		131	draw_type = "points";
		132	char *fly_font = "normal";
		133	css_class = "none";
		134	char *flytext = "";
		135	int canvas_type = DRAG_CANVAS; /* to use a specific canvas for filling etc */
		136	int pixelsize = 1;
		137	int fill_cnt = 0;
		138	int use_zoom = 0;
		139	font_size = 12;/* this may lead to problems when using something like <code>fontfamily Italic 24px Arial</code> the ''fontsize`` value is not substituted into fontfamily !! */
		140	int fly_font_size = 12; /fly_font_size is relative to this... /
		141	for(i=0;i<MAX_JS_FUNCTIONS;i++){js_function[i]=0;}
		142	int arrow_head = 8; /* size in px needed for arrow based userdraw: "userdraw arrow,color" */
		143	int crosshair_size = 5; /* size in px*/
		144	int plot_steps = 250;/* the js-arrays with x_data_points and y_data_points will have size 250 each: use with care !!! use jscurve when precise plots are required */
		145	int found_size_command = 0; /* 1 = found size ; 2 = found xrange; 3 = found yrange: just to flag an error message */
		146	int object_cnt = 0; /counter to identify the "onclick" ojects ; 0 is first object set onclick: reply[object_cnt]=1 when clicked ; otherwise reply[object_cnt]=0 ; object_cnt is only increased when another object is set again /
		147	int clock_cnt = 0; /* counts the amount of clocks used -> unique object clock%d */
		148	int boxplot_cnt = 0;
		149	int drawxml_cnt = 0;
		150	int numberline_cnt = 0;
		151	int snap_to_points_cnt = 0;
		152	int reply_precision = 100; /* used for precision of student answers / drawings */
		153	char rotation_center = "null";/ needs to be removed... but is used for canvas CTX based rotation*/
		154	double rotationcenter[] = {0,0}; /* use for recalculating x/y values on rotation() */
		155	int use_animate = 0; /* used for jscurve / js parametric */
		156	int use_input_xy = 0; /* 1= input fields 2= textarea 3=calc y value*/
		157	size_t string_length = 0; /* measure the size of the user input fly-string */
18609	bpr	158	double stroke_opacity = 0.95; /* use some opacity as default */
18552	bpr	159	double fill_opacity = 0.5;/* use some opacity as default */
		160	char *URL = "http://localhost/images";
		161	memset(buffer,'\0',MAX_BUFFER);
		162	void *tmp_buffer = "";
18555	bpr	163	double res[7];
18552	bpr	164	/* default writing a unzipped js-include file into wims getfile directory */
		165	char *w_wims_session = getenv("w_wims_session");
		166	if( w_wims_session == NULL \|\| *w_wims_session == 0 ){canvas_error("Hmmm, your wims environment does not exist...\nCanvasdraw should be used within wims.");}
		167	int L0=strlen(w_wims_session) + 21;
		168	char getfile_dir = my_newmem(L0); / create memory to fit string precisely */
		169	snprintf(getfile_dir,L0, "../sessions/%s/getfile",w_wims_session);/* string will fit precisely */
		170	mode_t process_mask = umask(0); /* check if file exists */
		171	int result = mkdir(getfile_dir, S_IRWXU \| S_IRWXG \| S_IRWXO);
		172	if( result == 0 \|\| errno == EEXIST ){
		173	umask(process_mask); /* be sure to set correct permission */
		174	char *w_session = getenv("w_session");
		175	int L1 = (int) (strlen(w_session)) + find_number_of_digits(canvas_root_id) + 48;
		176	getfile_cmd = my_newmem(L1); /* create memory to fit string precisely */
		177	snprintf(getfile_cmd,L1,"wims.cgi?session=%s&cmd=getfile&special_parm=%d.js",w_session,canvas_root_id);/* extension ".gz" is MANDATORY for webserver */
13306	obado	178	/* write the include tag to html page:<script src="wims.cgi?session=%s&cmd=getfile&special_parm=11223344_js"></script> */
7614	schaersvoo	179	/* now write file into getfile dir*/
14066	bpr	180	char w_wims_home = getenv("w_wims_home"); / "/home/users/wims": we need absolute path for location */
7614	schaersvoo	181	int L2 = (int) (strlen(w_wims_home)) + (int) (strlen(w_wims_session)) + find_number_of_digits(canvas_root_id) + 23;
		182	char location = my_newmem(L2); / create memory to fit string precisely */
		183	snprintf(location,L2,"%s/sessions/%s/getfile/%d.js",w_wims_home,w_wims_session,canvas_root_id);/absolute path /
		184	js_include_file = fopen(location,"w");/* open the file location for writing */
14066	bpr	185	/* check on opening...if nogood: mount readonly? disk full? permissions not set correctly? */
		186	if(js_include_file == NULL){ canvas_error("SHOULD NOT HAPPEN: could not write to javascript include file...check your system logfiles !" );}
7614	schaersvoo	187
		188	/* ----------------------------------------------------- */
11997	schaersvoo	189
18552	bpr	190	/* while more lines to process */
7614	schaersvoo	191
		192	while(!finished){
18552	bpr	193	if(line_number>1 && found_size_command == 0 && use_tooltip != 2 ){canvas_error("command \"size xsize,ysize\" needs to come first ! ");}
		194	type = get_token(infile);
		195	done = FALSE;
		196	/*
		197	@ canvasdraw
		198	@ Canvasdraw will try use the same basic syntax structure as flydraw
18572	bpr	199	@ General syntax <ul><li>The transparency of all objects can be controlled by command <a href="#opacity">opacity [0-255],[0,255]</a></li><li>line width of any object can be controlled by command <a href="#linewidth">linewidth int</a></li><li>any may be dashed by using keyword <a href="#dashed">dashed</a> before the object command.<br> the dashing type can be controled by command <a href="#dashtype">dashtype int,int</a>please note: dashing may have different spacing depending on the angle of the line<br>see https://wimsedu.info/?topic=dashed-arrows-not-dashed-in-canvasdraw</li><li>a fillable object can be set fillable by starting the object command with an ''f`` (like ''frect``,''fcircle``,''ftriangle`` ...) or by using the keyword <a href="#filled">filled</a> before the object command.<br>The fill colour of ''non_userdraw`` objects will be the stroke colour...(flydraw harmonization 19/10/2013)<br> non-solid filling (grid,hatch,diamond,dot,text) is provided using command <a href="#fillpattern">fillpattern a_pattern</a><br>note: do not use a <b>f</b> with this non-solid pattern filling !<br>for <a href="#filltoborder">filltoborder x0,y0,color</a> or <a href="#filltoborder">fill x0,y0,color</a> type filling (eg fill a region around x0,y0 with color until a border is encountered),<br>there are non-solid pattern fill analogues:<ul><li><a href="#gridfill">gridfill x,y,dx,dy,color</a></li><li><a href="#hatchfill">hatchfill x,y,dx,dy,color</a></li><li><a href="#diamondfill">diamondfill x,y,dx,dy,color</a></li><li><a href="#dotfill">dotfill x,y,dx,dy,color</a></li><li><a href="#textfill">textfill x,y,color,sometext_or_char</a></li></ul></li><li>all draggable objects may have a <a href="#slider">slider</a> for translation / rotation; several objects may be translated / rotated by a single slider</li> <li> a draggable object can be set draggable by a preceding command <a href="#drag">drag x/y/xy</a><br>The translation can be read by javascript:read_dragdrop();The replyformat is: object_number : x-orig : y-orig : x-drag : y-drag<br>The x-orig/y-orig will be returned in maximum precision (javascript float)...<br>the x-drag/y-drag will be returned in defined ''precision`` number of decimals<br>Multiple objects may be set draggable / clickable (no limit)<br>not all flydraw objects may be dragged / clicked<br>Only draggable / clickable objects will be scaled on <a href="#zoom">zoom</a> and will be translated in case of panning.</li><li> a ''onclick object`` can be set ''clickable`` by the preceding keyword <a href="#onclick">onclick</a><br>not all flydraw objects can be set clickable</li><li><b>remarks using a '';`` as command separator</b>. Commands with only numeric or colour arguments may be using a '';`` as command separator (instead of a new line). Commands with a string argument may not use a '';`` as command separator !<br>these exceptions are not really straight forward... so keep this in mind.</li><li>almost every <a href="#userdraw">userdraw object,color</a> or <a href="#multidraw">multidraw</a> command ''family`` may be combined with keywords <a href="#snaptogrid">"snaptogrid \| xsnaptogrid \| ysnaptogrid \| snaptofunction</a> or command <code>snaptopoints x1,y1,x2,y2,...</code></li><li>every draggable \| onclick object may be combined with keywords <a href="#snaptogrid">snaptogrid \| xsnaptogrid \| ysnaptogrid \| snaptofunction</a> or command <code>snaptopoints x1,y1,x2,y2,...</code></li><li>almost every command for a single object has a multiple objects counterpart:<br><ul>general syntax rule:<li><code>object x1,y1,...,color</code></li><li><code>objects color,x1,y1,...</code></li></ul><li>All inputfields or textareas generated, can be styled individually using command <a href="#css">css some_css</a><br>the fontsize used for labeling these elements can be controlled by command <a href="#fontsize">fontsize int</a> <br>command <code>fontfamily</code> is <b>not</b> active for these elements</li></ul>
18552	bpr	200	@ If needed multiple interactive scripts () may be used in a single webpage.<br>A function <code>read_canvas()</code> and / or <code>read_dragdrop()</code> can read all interactive userdata from these images.<br>The global array <code>canvas_scripts</code>will contain all unique random "canvas_root_id" of the included scripts.<br>The included local javascript "read" functions ''read_canvas%d()`` and ''read_dragdrop%d()`` will have this ''%d = canvas_root_id``<br>e.g. canvas_scripts[0] will be the random id of the first script in the page and will thus provide a function<br><code>fun = eval("read_canvas"+canvas_scripts[0])</code> to read user based drawings / inputfield in this first image.<br>The read_dragdrop is analogue.<br>If the default reply formatting is not suitable, use command <a href='#replyformat'>replyformat</a> to format the replies for an individual canvas script,<br>To read all user interactions from all included canvas scripts, use something like:<br><code>function read_all_canvas_images(){<br> var script_len = canvas_scripts.length;<br> var draw_reply = "";<br> var found_result = false;<br> for(var p = 0 ; p < script_len ; p++){<br>  var fun = eval("read_canvas"+canvas_scripts[p]);<br>  if( typeof fun === 'function'){<br>   var result = fun();<br>   if( result  && result.length != 0){<br>    if(script_len == 1 ){.return result;};<br>     found_result = true;<br>     draw_reply = draw_reply + result + "newline";<br>    };<br>   };<br>  };<br> if( found_result ){return draw_reply;}else{return null;};<br>};</code> <br>() Note: the speed advantage over <em>canvas-do-it-all</em> libraries is reduced to zero, when multiple canvasdraw scripts are present in a single page...<br>For example a typical canvasdraw script is between 5 and 40 kB...a large library like JSXgraph is approx 600 kB<br>In these cases it would be much faster to load a static general HTML5 canvas javascript draw library and parse it multiple raw fly instructions !<br>
17351	bpr	201	@ Canvasdraw can be used to paint a html5 bitmap image<br>by generating a tailor-made javascript include file: providing only the js-functionality needed to perform the job.<br>thus ensuring a minimal strain on the client browser <br>(unlike some popular ''canvas-do-it-all`` libraries, who have proven to be not suitable for low-end computers found in schools...)
18552	bpr	202	@ You can check the javascript reply format in the wims tool <a href="http://localhost/wims/wims.cgi?lang=en&module=tool/directexec">direct exec</a>
		203	@ For usage within OEF (without anstype ''draw``), something like this (a popup function plotter) will work:<br><code>\\text{popup_grapher=wims(exec canvasdraw <br>popup<br>size 400,400<br>xrange -10,10<br>yrange -10,10<br>axis<br>axisnumbering<br>opacity 100,100<br>grid 2,2,grey,2,2,6,black<br>snaptogrid<br>linewidth 2<br>jsplot red,5*sin(1/x)<br>strokecolor green<br>functionlabel f(x)=<br>userinput function<br>mouse blue,22<br>)<br>}<br>\\statement{<br>\\popup_grapher<br>}</code>.
		204	@ Be aware that older browsers will probably not work correctly<br>no effort has been undertaken to add glue code for older browsers !! <br>in any case it is not wise to use older browsers...not just for canvasdraw.
		205	@ Be aware that combining several different objects and interactivity may lead to problems.
		206	@ If you find flaws, errors or other incompatibilities -not those mentioned in this document- send <a href='mailto:jm.evers-at-schaersvoorde.nl'>me</a> an email with screenshots and the generated javascript include file.
		207	@ There is limited support for touch devices: touchstart, touchmove and touchend in commands <a href="#userdraw">userdraw primitives </a>, <a href="#multidraw">multidraw primitives </a>, <a href="#protractor">protractor</a>, <a href="#ruler">ruler</a> and probably a few others... <br>Only single finger gestures are supported (for now).<br>The use of a special pen is advised for interactive drawing on touch devices.<br>For more accurate user-interaction (numeric, eg keyboard driven drawings) with canvasdraw on touch devices: use the command family <a href="#userinput_xy">userinput</a>.
		208	*/
		209	switch(type){
		210	case END:finished = 1;done = TRUE;break;
		211	case 0:sync_input(infile);break;
		212	case AFFINE:
		213	/*
18556	bpr	214	@ affine a,b,c,d,tx,ty
		215	@ defines a transformation matrix for subsequent objects
		216	@ use keyword <a href='#killaffine'>killaffine</a> to end the transformation...the next objects will be drawn in the original x/y-range
		217	@ a: Scales the drawings horizontally
		218	@ b: Skews the drawings horizontally
		219	@ c: Skews the drawings vertically
		220	@ d: Scales the drawings vertically
		221	@ tx: Moves the drawings horizontally in xrange coordinate system
		222	@ ty: Moves the drawings vertically in yrange coordinate system
		223	@ the data precision may be set by preceding command ''precision int``
		224	@ <b>note</b>: not all affine operations on canvasdraw objects will be identical to flydraw's behaviour. Make sure to check !
		225	@%affine%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%#use larger linewith to improve selecting a draggable object !%linewidth 4%drag xy%frect 0,5,3,3,red%affine cos(pi/4),sin(pi/4),-cos(pi/2),sin(pi/2),-5,-5%drag xy%frect 0,5,3,3,red
		226	@%affine+latex%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%strokecolor blue%fontfamily 42px Arial%centered%drag xy%latex 5,5,\\frac{123}{\\pi^{234}}%affine cos(pi/4),sin(pi/4),-cos(pi/2),sin(pi/2),-5,-5%drag xy%latex 5,5,\\frac{123}{\\pi^{234}}
18552	bpr	227	*/
		228	for(i = 0 ; i<6;i++){
		229	switch(i){
		230	case 0: affine_matrix[0] = get_real(infile,0);break;
		231	case 1: affine_matrix[1] = get_real(infile,0);break;
		232	case 2: affine_matrix[2] = get_real(infile,0);break;
		233	case 3: affine_matrix[3] = get_real(infile,0);break;
		234	case 4: affine_matrix[4] = get_real(infile,0);break;
		235	case 5: affine_matrix[5] = get_real(infile,1);
		236	use_affine = TRUE;
		237	break;
		238	default: break;
		239	}
		240	}
		241	break;
14394	schaersvoo	242	case ALLOW_DUPLICATES:
18556	bpr	243	/*
		244	@ duplicates \|\| allowdups
		245	@ keyword (no arguments)
		246	@ only useful in case of a <a href="#multidraw">multidraw</a> student reply.
		247	@ only useful in default <a href="#replyformat">replyformat</a> (eg in case of a not specified replyformat).
		248	@ if set, duplicate (x:y) coordinates will not be removed from the student reply.
		249	@ technical: a javascript variable "allow_duplicate_answer = 1;" is declared.
		250	@ default for command multidraw is: removal of duplicates.
		251	*/
18552	bpr	252	fprintf(js_include_file,"var allow_duplicate_answers = 1;");
		253	break;
		254	case ANGLE:
18556	bpr	255	/*
		256	@ angle xc,yc,width,start_angle,end_angle,color
		257	@ width is in x-range
		258	@ angles are in degrees
		259	@ not compatible with ''flydraw``
		260	@ will zoom in/out
		261	@ may be set onclick or drag&drop
		262	@ if angle size is controlled by command <a href='#slider'>slider</a>, use radians to set limits of slider
		263	@ ''angle`` and <a href="#arc">arc</a> are exceptions in case of sliders...they are always active (e.g. not click-activated)
		264	@%angle%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%angle 0,0,4,10,135,blue
		265	@%angle_slider%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%strokecolor blue%slider -2pi,2pi,260,28,angle active degree,blue arrow%arrow 0,0,8,0,8,blue%fillpattern diamond%angle 0,0,2,0,0,blue%killslider%strokecolor red%slider -2pi,2pi,260,28,angle active radian,red arrow%arrow 0,1,8,1,8,red%fillpattern dot%angle 0,1,2,0,0,red
		266	*/
18552	bpr	267	for(i=0;i<7;i++){
		268	switch(i){
		269	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		270	case 1:double_data[1] = get_real(infile,0);
		271	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		272	if(use_affine == TRUE ){ transform(2,2);}
		273	break; /* y-values */
		274	case 2:double_data[2] = get_real(infile,0);break; /* width x-range ! */
		275	case 3:double_data[3] = 0.0174532925(get_real(infile,0) - angle);break; / start angle in degrees -> radians */
		276	case 4:double_data[4] = 0.0174532925(get_real(infile,0) - angle);break; / end angle in degrees -> radians */
		277	case 5:stroke_color = get_color(infile,1);/* name or hex color */
		278	if( use_slider != -1 ){ onclick = 3; }/* always active in case of slider */
		279	decimals = find_number_of_digits(precision);
18557	bpr	280	tmp_buffer=my_newmem(MAX_BUFFER);
		281	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,17,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	282	add_to_buffer(tmp_buffer);
		283	dragstuff[17] = 1;
		284	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		285	if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		286	break;
		287	}
		288	}
		289	break;
		290	case ANIMATE:
		291	/*
18556	bpr	292	@ animate
		293	@ keyword
		294	@ if set, it will animate a point on a curve
		295	@ all other canvas object or group of objects (like lines,circles,rects,points...images,svg,latex,mathml etc)<br>may be animated using command <a href='#slider'>slider</a> with keyword 'anim'
		296	@ the animated point is a filled rectangle ; adjust colour with command <code>fillcolor colorname/hexnumber</code>
		297	@ use linewidth to adjust size of the points
		298	@ will animate a point on -only- the next <a href='#jsplot'>jsplot/jscurve command</a>. Only a single call to <code>animate</code> is allowed...in case of multiple <code>animate</code> keywords, only the last one is valid
		299	@ only usable in combination with command <a href='#jsplot'>jsplot</a> (normal functions or parametric)
		300	@ moves repeatedly from <a href='#xrange'>xmin to xmax</a> or in case of a parametric function from <a href='#trange'>tmin to tmax</a>
		301	@ use commands <a href='#multilinewidth'>multilinewidth</a>, <a href='#multistrokecolor'>multistrokecolor</a> etc in case of multiple animated functions.<br>use multiple functions as argument in a single call to <a href='#jsplot'>jsplot color,fun1,fun2,fun3...fun_n</a>
		302	@%animate_1%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%fillcolor red%animate%trange -2pi,2pi%linewidth 1%opacity 255,50%canvastype 100%fill 1.2,1.2,red%canvastype 101%fill -1.2,-1.2,blue%jsplot blue,7cos(x),5sin(2*x)
		303	@%animate_2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%fillcolor red%animate%trange -2pi,2pi%linewidth 1%opacity 255,50%canvastype 100%fill 1.2,1.2,red%canvastype 101%fill -1.2,-1.2,blue%multistrokecolors blue,blue,green,green,orange,orange%multilinewidth 2,2,3,3,1,1%jsplot blue,7cos(x),5sin(2x),9sin(x),5*cos(x),x^2,x
18552	bpr	304	*/
		305	use_animate++;
		306	if( use_animate == 1 ){
		307	fprintf(js_include_file,"\nvar trace_canvas = create_canvas%d(%d,xsize,ysize);\
		308	var trace_ctx = trace_canvas.getContext('2d');\
		309	trace_ctx.fillStyle = 'rgba(%s,%f)';\
		310	trace_ctx.strokeStyle = 'rgba(%s,%f)';\
		311	trace_ctx.lineWidth = %d;var anim_pos = 0;\n\
		312	function animate_this(){\
		313	var sync;\
		314	var synchrone = Math.floor(animation_steps/animation_funs);\
		315	trace_ctx.clearRect(0,0,xsize,ysize);\
		316	for(var p=0; p<animation_funs;p++){\
		317	sync = p*synchrone;\
		318	trace_ctx.fillRect(x_anim_points[sync+anim_pos]-%d, y_anim_points[sync+anim_pos]-%d,%d,%d);\
		319	};\
		320	setTimeout(function(){\
		321	requestAnimationFrame(animate_this); anim_pos++;}, 50\
		322	);\
		323	if(anim_pos >= animation_steps){anim_pos = 0;};\
		324	};",canvas_root_id,ANIMATE_CANVAS,fill_color,fill_opacity,stroke_color,stroke_opacity,line_width,line_width,line_width,2line_width,2line_width);
		325	} else {
		326	canvas_error("animate can only be used once<br>multiple curves may be animated using something like:<br>jsplot red,sin(x),cos(x),x^2,sin(2*x)");
		327	}
		328	break;
		329	case ARC:
		330	/*
18556	bpr	331	@ arc xc,yc,x-width,y-height,start_angle,end_angle,color
		332	@ may be set ''onclick`` or ''drag xy``
		333	@ compatible with ''flydraw``
		334	@ attention: width & height in x/y-range
		335	@ for arrow hats on an arc, see command <a href='#arcarrow'>arcarrow or arrowarc</a>
		336	@ better use command <a href='#angle'>angle</a> for use with a <a href='#slider'>slider</a>
		337	@%arc%size 400,400%xrange -10,10%yrange -10,10%arc 0,0,4,4,10,135,red
		338	@%arc_filled%size 400,400%xrange -10,10%yrange -10,10%opacity 255,60%filled%fillcolor green%arc 0,0,4,4,10,135,red
18552	bpr	339	*/
		340	for(i=0;i<7;i++){
		341	switch(i){
		342	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		343	case 1:double_data[1] = get_real(infile,0);
		344	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		345	if(use_affine == TRUE ){ transform(4,2);}
		346	break; /* y-values */
		347	case 2:double_data[2] = get_real(infile,0);break; /* width x-range no pixels ! */
		348	case 3:double_data[3] = get_real(infile,0);
		349	break; /* height y-range no pixels ! */
		350	case 4:double_data[4] = get_real(infile,0) - angle ;break; /* start angle in degrees */
		351	case 5:double_data[5] = get_real(infile,0) - angle;break; /* end angle in degrees */
		352	case 6:stroke_color = get_color(infile,1);/* name or hex color */
		353	/* in Shape library:
		354	x[0] = x[1] = xc = double_data[0]
		355	y[0] = y[1] = yc = double_data[1]
		356	w[0] = width = double_data[2]
		357	w[1] = height = double_data[3]
		358	h[0] = start_angle = double_data[4]
		359	h[1] = end_angle = double_data[5]
		360	*/
18555	bpr	361	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		362	decimals = find_number_of_digits(precision);
18557	bpr	363
		364	tmp_buffer=my_newmem(MAX_BUFFER);
		365	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18555	bpr	366	add_to_buffer(tmp_buffer);reset();
		367	dragstuff[12] = 1;
		368	if(onclick != 0){object_cnt++;}
		369	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
18552	bpr	370	break;
		371	}
		372	}
		373	break;
		374	case ARCARROW:
		375	/*
18556	bpr	376	@ arrowarc xc,yc,x-width,y-height,start_angle,end_angle,color,type
		377	@ alternative: arcarrow
		378	@ uses same syntax as <a href='#arc'>arc</a>
		379	@ for arrow hat: type = 1 : right<br>type = 2 : left<br>type = 3 : left&right
		380	@ if the default arrow hat/head is not satisfactory , the size of the arrow may be set with command <a href='#arrowhead'>arrowhead</a>
		381	@ no other arrow types are implemented...yet
		382	@ may be set draggable or onclick
		383	@ attention: when width ad height are very different, the arrow hat is not drawn correctly. This is a flaw and not a feature...(for now: too much calculations to correct)
		384	@%arcarrow%size 400,400%xrange -10,10%yrange -10,10%noreset%onclick%arcarrow 0,0,7,7,50,275,blue,3%arcarrow 0,0,8,8,50,275,red,2%arcarrow 0,0,9,9,50,275,green,1
18552	bpr	385	*/
		386	for(i=0;i<8;i++){
		387	switch(i){
		388	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		389	case 1:double_data[1] = get_real(infile,0);
		390	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		391	if(use_affine == TRUE ){ transform(4,2);}
		392	break; /* y-values */
		393	case 2:double_data[2] = get_real(infile,0);break; /* width x-range no pixels ! */
		394	case 3:double_data[3] = get_real(infile,0);
		395	break; /* height y-range no pixels ! */
		396	case 4:double_data[4] = get_real(infile,0) - angle ;break; /* start angle in degrees */
		397	case 5:double_data[5] = get_real(infile,0) - angle;break; /* end angle in degrees */
		398	case 6:stroke_color = get_color(infile,0);/* name or hex color */
		399	break;
		400	case 7:int_data[0] = (int) get_real(infile,1);
		401	switch(int_data[0]){
		402	case 1: int_data[1] = 24;break; /* right */
		403	case 2: int_data[1] = 25;break; /* left */
		404	case 3: int_data[1] = 26;break; /* left&right */
		405	default:int_data[1] = 24;break;
		406	}
		407	if(int_data[0] == 1 ){int_data[1] = 24;}
		408	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		409	decimals = find_number_of_digits(precision);
18557	bpr	410
		411	tmp_buffer=my_newmem(MAX_BUFFER);
		412	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"var arrow_head = %d;dragstuff.addShape(new Shape(%d,%d,%d,%d,%d,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",arrow_head,drag_type,object_cnt,onclick,use_snap,int_data[1],decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	413	add_to_buffer(tmp_buffer);
		414	dragstuff[int_data[1]] = 1;
		415	if(onclick != 0){object_cnt++;}
		416	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		417	js_function[JS_ARROWHEAD] = 1;
		418	reset();
		419	}
		420	}
		421	break;
		422	case ARROW:
		423	/*
		424	@ arrow x1,y1,x2,y2,h,color
		425	@ alternative: vector
		426	@ draw a single headed arrow / vector from (x1:y1) to (x2:y2)<br>with arrowhead size h in px and in color ''color``
		427	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		428	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		429	@%arrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%arrow 0,0,4,3,8,blue%drag xy%arrow 0,0,-4,3,8,green%drag xy%arrow 0,0,4,-3,8,orange%drag xy%arrow 0,0,-4,-3,8,cyan
		430	@%arrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%arrow 0,0,4,4,8,blue%onclick%arrow 0,0,-4,5,8,green%onclick%arrow 0,0,4,-6,8,orange%onclick%arrow 0,0,-4,-2,8,cyan
		431	*/
		432	for(i=0;i<6;i++){
		433	switch(i){
		434	case 0: double_data[0] = get_real(infile,0);break; /* x */
		435	case 1: double_data[1] = get_real(infile,0);break; /* y */
		436	case 2: double_data[2] = get_real(infile,0);break; /* x */
		437	case 3: double_data[3] = get_real(infile,0);break; /* y */
		438	case 4: arrow_head = (int) get_real(infile,0);break;/* h */
		439	case 5: stroke_color = get_color(infile,1);/* name or hex color */
		440	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		441	if(use_affine == TRUE ){ transform(4,2);}
		442	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		443	decimals = find_number_of_digits(precision);
18557	bpr	444
		445	tmp_buffer=my_newmem(MAX_BUFFER);
		446	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	447	if(onclick != 0){object_cnt++;}
		448	/* object_cnt++;*/
		449	add_to_buffer(tmp_buffer);reset();
		450	dragstuff[8] = 1;
		451	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		452	break;
		453	}
		454	}
		455	break;
		456	case ARROWS:
		457	/*
		458	@ arrows color,head (px),x1,y1,x2,y2...x_n,y_n
		459	@ alternative: vectors
		460	@ draw single headed arrows / vectors from (x1:y1) to (x2:y2) ... (x3:y3) to (x4:y4) etc ... in color 'color'
		461	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		462	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		463	@%arrows_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
		464	@%arrows_drag%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
		465	@%arrows_drag_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%# Click arrow(s) to activate %slider 0,2pi,300,30,angle degrees,Rotate%slider -5,5pi,300,30,x display,move in x-direction%slider -10,10*pi,300,30,y display,move in y-direction%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
		466	*/
		467	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		468	fill_color = stroke_color;
		469	arrow_head = (int) get_real(infile,0);/* h */
		470	i=0;
		471	while( ! done ){ /* get next item until EOL*/
		472	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		473	if(i%2 == 0 ){
		474	double_data[i] = get_real(infile,0); /* x */
		475	} else {
		476	double_data[i] = get_real(infile,1); /* y */
		477	}
		478	i++;
		479	}
		480	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		481	if( use_affine == TRUE ){ transform(i-1,2);}
		482	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		483	decimals = find_number_of_digits(precision);
		484	for(c = 0 ; c < i-1 ; c = c+4){
18557	bpr	485	tmp_buffer=my_newmem(MAX_BUFFER);
		486	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	487	add_to_buffer(tmp_buffer);
		488	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		489	}
		490	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		491	dragstuff[8] = 1;
		492	reset();
		493	break;
		494	case ARROW2:
		495	/*
		496	@ arrow2 x1,y1,x2,y2,h,color
		497	@ draw a double headed arrow/vector from (x1:y1) to (x2:y2)<br>with arrowhead size h in px and in color ''color``
		498	@ use command <code>arrowhead int</code> to adjust the arrow head size
		499	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		500	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		501	@%arrow2%size 400,400%xrange -10,10%yrange -10,10%drag xy%arrow2 0,0,4,3,8,blue%
		502	*/
		503	for(i=0;i<6;i++){
		504	switch(i){
		505	case 0: double_data[0] = get_real(infile,0);break; /* x */
		506	case 1: double_data[1] = get_real(infile,0);break; /* y */
		507	case 2: double_data[2] = get_real(infile,0);break; /* x */
		508	case 3: double_data[3] = get_real(infile,0);break; /* y */
		509	case 4: arrow_head = (int) get_real(infile,0);break;/* h */
		510	case 5: stroke_color = get_color(infile,1);/* name or hex color */
		511	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		512	if( use_affine == 1 ){ transform(4,2);}
		513	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		514	decimals = find_number_of_digits(precision);
18557	bpr	515	tmp_buffer=my_newmem(MAX_BUFFER);
		516	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	517	add_to_buffer(tmp_buffer);
		518	if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		519	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		520	dragstuff[10] = 1;
		521	reset();
		522	break;
		523	}
		524	}
		525	break;
		526	case ARROWS2:
		527	/*
		528	@ arrows2 color,head (px),x1,y1,x2,y2...x_n,y_n
		529	@ draw double headed arrows / vectors from (x1:y1) to (x2:y2) ... (x3:y3) to (x4:y4) etc ... in color ''color``
		530	@ use command <code>linewidth int</code> to adjust thickness of the arrows
		531	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		532	@%arrows2%size 400,400%xrange -10,10%yrange -10,10%onclick%arrows2 red,8,0,0,4,3,1,1,2,4,2,2,-2,4,3,3,-3,-4,0,0,3,-2%
		533	*/
		534	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		535	fill_color = stroke_color;
		536	arrow_head = (int) get_real(infile,0);/* h */
		537	i=0;
		538	while( ! done ){ /* get next item until EOL*/
		539	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		540	if(i%2 == 0 ){
		541	double_data[i] = get_real(infile,0); /* x */
		542	} else {
		543	double_data[i] = get_real(infile,1); /* y */
		544	}
		545	i++;
		546	}
		547	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		548	if( use_affine == 1 ){ transform(i-1,2);}
		549	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
8386	schaersvoo	550
18552	bpr	551	decimals = find_number_of_digits(precision);
		552	for(c = 0 ; c < i-1 ; c = c+4){
18557	bpr	553	tmp_buffer=my_newmem(MAX_BUFFER);
		554	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	555	add_to_buffer(tmp_buffer);
		556	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		557	}
		558	dragstuff[10] = 1;
		559	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		560	reset();
		561	break;
		562	case ARROWHEAD:
		563	/*
		564	@ arrowhead int
		565	@ default 8 (pixels)
		566	*/
		567	arrow_head = (int) (get_real(infile,1));
		568	break;
		569	case AUDIO:
		570	/*
		571	@ audio x,y,w,h,loop,visible,audiofile location
		572	@ x,y: left top corner of audio element (in xrange / yrange)
		573	@ w,y: width and height in pixels
		574	@ loop: 0 or 1 ( 1 = loop audio fragment)
		575	@ visible: 0 or 1 (1 = show controls)
		576	@ audio format may be in .mp3 or .ogg
		577	@ If you are using *.mp3: be aware that FireFox will not (never) play this ! (Pattented format)
		578	@ if you are using *.ogg: be aware that Microsoft based systems not support it natively
		579	@ To avoid problems supply both types (mp3 and ogg) of audiofiles.<br>the program will use both as source tag
		580	*/
		581	js_function[DRAW_AUDIO] = 1;
		582	for(i=0;i<7;i++){
		583	switch(i){
		584	case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x in x/y-range coord system -> pixel */
		585	case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y in x/y-range coord system -> pixel */
		586	case 2: int_data[2] = (int) (get_real(infile,0)); break; /* pixel width */
		587	case 3: int_data[3] = (int) (get_real(infile,0)); break; /* height pixel height */
		588	case 4: int_data[4] = (int) (get_real(infile,0)); if(int_data[4] != TRUE){int_data[4] = FALSE;} break; /* loop boolean */
		589	case 5: int_data[5] = (int) (get_real(infile,0)); if(int_data[5] != TRUE){int_data[5] = FALSE;} break; /* visible boolean */
		590	case 6:
		591	temp = get_string(infile,1);
		592	if( strstr(temp,".mp3") != 0 ){ temp = str_replace(temp,".mp3","");}
		593	if( strstr(temp,".ogg") != 0 ){ temp = str_replace(temp,".ogg","");}
18557	bpr	594	tmp_buffer=my_newmem(MAX_BUFFER);
		595	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_audio(%d,%d,%d,%d,%d,%d,%d,\"%s.ogg\",\"%s.mp3\");\n", canvas_root_id, int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],temp,temp));
18552	bpr	596	add_to_buffer(tmp_buffer);
		597	break;
		598	default:break;
		599	}
		600	}
		601	reset();
		602	break;
		603	case AXIS_NUMBERING:
		604	/*
18556	bpr	605	@ axisnumbering
		606	@ keyword (no arguments required)
		607	@ for special numbering of x-axis or y-axis see grid related commands <a href="#axis">axis</a> <a href="#xaxis">xaxis</a>, <a href="#xaxisup">xaxisup</a>, <a href="#noxaxis">noxaxis</a>, <a href="#yaxis">yaxis</a>, <a href="#yaxisup">yaxisup</a>, <a href="#noyaxis">noyaxis</a>
		608	@ to be used before command grid (see <a href="#grid">command grid</a>)
18552	bpr	609	*/
		610	use_axis_numbering++;
		611	break;
		612	case AXIS:
		613	/*
18556	bpr	614	@ axis
		615	@ keyword (no arguments required)
		616	@ to be used before command grid (see <a href="#grid">command grid</a>)
8386	schaersvoo	617
18552	bpr	618	*/
		619	use_axis = TRUE;
		620	break;
		621	case BARCHART:
		622	/*
		623	@ barchart x_1:y_1:color_1:x_2:y_2:color_2:...x_n:y_n:color_n
		624	@ may <b>only</b> to be used together with command <a href='#grid'>grid</a>
		625	@ can be used together with freestyle x-axis/y-axis texts: see commands <a href='#xaxis'>xaxis</a>,<a href='#xaxisup'>xaxisup</a> and <a href='#yaxis'>yaxis</a>
		626	@ use command <a href='#legend'>legend</a> to provide an optional legend in right-top-corner
		627	@ multiple barchart command may be used in a single script
		628	@ also see command <a href='#piechart'>piechart</a>
		629	@ note: your arguments are not checked by canvasdraw: use your javascript console in case of trouble...
		630	@%barchart%size 400,400%xrange -1,10%yrange -2,14%legend legend Z:legend A:this is B:C:D:E:F:G:H:X%legendcolors green:red:orange:lightblue:cyan:gold:purple:darkred:yellow:lightgreen%xaxis 0:Z:1:A:2:B:3:C:4:D:5:E:6:F:7:G:8:H:9:X%noyaxis%precision 1%fontfamily bold 15px Arial%grid 1,1,white%barchart 0:5.5:green:2:5.5:red:4:6.5:orange:6:8:lightblue:8:11:cyan:1:5.5:gold:3:9:purple:5:4:darkred:7:7:yellow:9:1:lightgreen%mouse red,14
		631	*/
		632	temp = get_string(infile,1);
		633	if( strstr( temp,":" ) != 0 ){ temp = str_replace(temp,":","\",\""); }
		634	fprintf(js_include_file,"var barchart_%d = [\"%s\"];",barchart_cnt,temp);
		635	barchart_cnt++;
		636	reset();
		637	break;
		638	case BEZIER:
		639	/*
		640	@ bezier color,x_start,y_start,x_first,y_first,x_second,y_second,x_end,y_end
		641	@ draw a bezier curve between points, starting from (x_start:y_start)
		642	@ can <b>not</b> be dragged or set onclick
		643	*/
		644	js_function[DRAW_BEZIER] = 1;
		645	decimals = find_number_of_digits(precision);
		646	for(i = 0 ; i < 9; i++){
		647	switch(i){
		648	case 0: stroke_color = get_color(infile,0);break;
		649	case 1: double_data[0] = get_real(infile,0);break;/* start x */
		650	case 2: double_data[1] = get_real(infile,0);break;/* start y */
		651	case 3: double_data[2] = get_real(infile,0);break;/The x-coordinate of the first B�zier control point /
		652	case 4: double_data[3] = get_real(infile,0);break;/The y-coordinate of the first B�zier control point /
		653	case 5: double_data[4] = get_real(infile,0);break;/The x-coordinate of the second B�zier control point /
		654	case 6: double_data[5] = get_real(infile,0);break;/The y-coordinate of the second B�zier control point /
		655	case 7: double_data[6] = get_real(infile,0);break;/The x-coordinate of the B�zier end point /
		656	case 8: double_data[7] = get_real(infile,1);/The y-coordinate of the B�zier end point /
		657	if(use_rotate == TRUE ){rotate(8,angle,rotationcenter,2);}
		658	if(use_affine == TRUE ){ transform(2,5);}
18557	bpr	659	tmp_buffer=my_newmem(MAX_BUFFER);
		660	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"draw_bezier(%d,%d,[%f,%f,%f,%f,%f,%f,%f,%f],\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.2f);",STATIC_CANVAS,line_width,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],double_data[6],double_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle));
18552	bpr	661	add_to_buffer(tmp_buffer);
		662	break;
		663	default: break;
		664	}
		665	}
		666	reset();
		667	break;
		668	case BGCOLOR:
		669	/*
18556	bpr	670	@ bgcolor colorname or #hex
		671	@ use this color as background of the "div" containing the canvas(es)
		672	@%bgcolor%size 400,400%xrange -10,10%yrange -10,10%bgcolor lightblue
18552	bpr	673	*/
		674	/* [255,255,255]*/
		675	bgcolor = get_string(infile,1);
		676	if(strstr(bgcolor,"#") == NULL){ /* convert colorname -> #ff00ff */
		677	int found = 0;
		678	for( i = 0; i < NUMBER_OF_COLORNAMES ; i++ ){
		679	if( strcmp( colors[i].name , bgcolor ) == 0 ){
		680	bgcolor = colors[i].hex;
		681	found = 1;
		682	break;
		683	}
		684	}
		685	if(found == 0){canvas_error("your bgcolor is not in my rgb.txt data list: use hexcolor...something like #a0ffc4");}
		686	}
		687	fprintf(js_include_file,"/* set background color of canvas div */\ncanvas_div.style.backgroundColor = \"%s\";canvas_div.style.opacity = %f;\n",bgcolor,fill_opacity);
		688	break;
		689	case BGIMAGE:
		690	/*
18556	bpr	691	@ bgimage image_location
		692	@ use an image as background; technical: we use the background of ''canvas_div``
		693	@ the background image will be resized to match "width = xsize" and "height = ysize"
		694	@%bgimage%size 400,400%xrange -10,10%yrange -10,10%bgimage https://wims.unice.fr/wims/gifs/en.gif
18552	bpr	695	*/
		696	URL = get_string(infile,1);
		697	fprintf(js_include_file,"/* set background image to canvas div */\ncanvas_div.style.backgroundImage = \"url(%s)\";canvas_div.style.backgroundSize = \"%dpx %dpx\";\n",URL,xsize,ysize);
		698	break;
		699	case BLINK:
		700	/*
18556	bpr	701	@ blink time(seconds)
		702	@ NOT IMPLEMETED -YET
18552	bpr	703	*/
		704	break;
		705	case BOXPLOT:
		706	/*
		707	@ boxplot x_or_y,box-height_or_box-width,position,min,Q1,median,Q3,max
		708	@ example:<br><code>xrange 0,300<br>yrange 0,10<br>boxplot x,4,8,120,160,170,220,245</code><br>meaning: create a boxplot in x-direction, with height 4 (in yrange) and centered around line y=8
		709	@ example:<br><code>xrange 0,10<br>yrange 0,300<br>boxplot y,4,8,120,160,170,220,245</code><br>meaning: create a boxplot in y-direction, with width 4 (in xrange) and centered around line x=8
		710	@ use command <a href='#filled'>filled</a> to fill the box<br><b>note:</b> the strokecolor is used for filling Q1, the fillcolor is used for filling Q3
		711	@ use command <a href='#fillpattern'>fillpattern some_pattern</a> to use a (diamond for Q1, hatch for Q3) pattern.
		712	@ use command <a href='#opacity'>opacity</a> to adjust fill_opacity of stroke and fill colours
		713	@ use command <a href='#legend'>legend</a> to automatically create a legend <br>unicode allowed in legend<br>use command <a href='#fontfamily'>fontfamily</a> to set the font of the legend.
		714	@ there is no limit to the number of boxplots used.
		715	@ can <b>not</b> be set draggable and <a href='#onclick'>onclick</a> is not ready yet
		716	@ use keyword <a href="#userboxplot">userboxplot</a> before command boxplot, if a pupil must draw a boxplot (using his own min,Q1,median,Q3,max data)
		717	@ use keyword <a href="#userboxplotdata">userboxplotdata</a> before command boxplot, if a pupil must generate the data by some means.
		718	@ use command <a href="#boxplotdata">boxplotdata</a> when the boxplot should be drawn from wims-generated raw statistical date
		719	@%boxplot_1%size 400,400%xrange 0,300%yrange 0,10%opacity 120,50%filled%fillcolor orange%strokecolor blue%linewidth 2%boxplot x,4,8,120,160,170,220,245
		720	@%boxplot_2%size 400,400%xrange 0,10%yrange 0,300%opacity 120,50%filled%fillcolor orange%strokecolor blue%linewidth 2%boxplot y,4,8,120,160,170,220,245
		721	@%boxplot_3%size 400,400%xrange 0,100%yrange 0,10%fillpattern hatch%linewidth 3%fillcolor red%strokecolor green%boxplot x,1,2,4,14,27,39,66%strokecolor blue%boxplot x,1,4,15,45,50,66,87%strokecolor red%boxplot x,1,6,45,70,80,90,100%strokecolor orange%boxplot x,1,8,28,38,48,56,77%mouse red,16
		722	*/
		723	js_function[DRAW_BOXPLOT] = 1;
		724	for(i=0;i<8;i++){
		725	switch(i){
		726	case 0: temp = get_string_argument(infile,0);
		727	if( strstr(temp,"x") != 0){int_data[0] = 1;}else{int_data[0] = 0;} break; /* x or y */
		728	case 1: double_data[0] = get_real(infile,0);break;/* height \| width */
		729	case 2:
		730	if( js_function[DRAW_JSBOXPLOT] == 0 ){
		731	double_data[1] = get_real(infile,0);
		732	fprintf(js_include_file,"var boxplot_source = 0;\n");/* we use given min,Q1,median,Q3,max */
		733	}
		734	else {
		735	double_data[1] = get_real(infile,1);
		736	double_data[2] = 1;
		737	double_data[3] = 1;
		738	double_data[4] = 1;
		739	double_data[5] = 1;
		740	double_data[6] = 1;
		741	double_data[7] = 1;
		742	i=8;
		743	}
		744	break;/* center value x or y */
		745	case 3: double_data[2] = get_real(infile,0); break;/* min */
		746	case 4: double_data[3] = get_real(infile,0); break;/* Q1 */
		747	case 5: double_data[4] = get_real(infile,0); break;/* median */
		748	case 6: double_data[5] = get_real(infile,0); break;/* Q3 */
		749	case 7: double_data[6] = get_real(infile,1); break;/* max */
		750	default:break;
		751	}
		752	}
		753	decimals = find_number_of_digits(precision);
		754	/function draw_boxplot(canvas_type,xy,hw,cxy,data,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1)/
18557	bpr	755	tmp_buffer=my_newmem(MAX_BUFFER);
		756	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"draw_boxplot(%d,%d,%.f,%.f,[%.f,%.f,%.f,%.f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d);\n",BOXPLOT_CANVAS+boxplot_cnt,int_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],decimals,double_data[6],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1]));
18552	bpr	757	add_to_buffer(tmp_buffer);
		758	boxplot_cnt++;
		759	reset();
		760	break;
		761	case BOXPLOTDATA:
		762	/*
		763	@ boxplotdata some_data
		764	@ 'some_data' are a list of numbers separated by a comma "," (items)
		765	@ only be used before command <code>boxplot</code>: the command <a href="#boxplot">boxplot</a> will provide the boxplot drawing of the data.
		766	@ xrange 0,100<br>yrange 0,10<br>boxplotdata 11,22,13,15,23,43,12,12,14,2,45,32,44,13,21,24,13,19,35,21,24,23<br>boxplot x,4,5
		767	@ note: wims will not check your data input \| format. use js-error console to debug any problems.
		768	@ a javascript function <code>statistics()</code> will parse the data and calculate the values [min,Q1,median,Q3,max] and hand them to the boxplot draw function.
		769	@ only a single call to <code>boxplotdata</code> can be made. If multiple boxplots should be present in a single canvas, then use multiple calls to command <a href='#boxplot'>boxplot</a>
		770	@%boxplotdata%size 400,400%xrange 0,100%yrange 0,10%strokecolor orange%fillpattern hatch%linewidth 3%strokecolor green%boxplotdata 11,22,13,15,23,43,12,12,14,2,45,32,44,13,21,24,13,19,35,21,24,23%boxplot x,2,2%mouse red,16
		771	*/
		772	js_function[DRAW_JSBOXPLOT] = 1;
		773	js_function[DRAW_BOXPLOT] = 1;
		774	fprintf(js_include_file,"var boxplot_source = 1;var jsboxplot_data = [%s];\n",get_string(infile,1));
		775	break;
		776	case CANVASTYPE:
		777	canvas_type = (int) (get_real(infile,1));
		778	/*
		779	@ canvastype TYPE
		780	@ for now only useful before commands filltoborder / floodfill / clickfill etc operations<br>Only the images of this TYPE will be scanned and filled
		781	@ default value of TYPE is DRAG_CANVAS e.g. 5 (all clickable / draggable object are in this canvas)
		782	@ use another TYPE, if you know what you are doing...
		783	@ other possible canvasses (e.g. transparent PNG pictures, xsize × ysize on top of each other)<ul><li> EXTERNAL_IMAGE_CANVAS 0</li><li> BG_CANVAS 1</li><li> STATIC_CANVAS 2</li><li> MOUSE_CANVAS 3</li><li> GRID_CANVAS 4</li><li> DRAG_CANVAS 5</li><li> DRAW_CANVAS 6</li><li> TEXT_CANVAS 7</li><li> CLOCK_CANVAS 8</li><li> ANIMATE_CANVAS 9</li><li> TRACE_CANVAS 10</li><li>BOXPLOT_CANVAS 11</li><li> JSPLOT_CANVAS 100, will increase with every call</li><li> FILL_CANVAS 200, will increase with every call</li><li> USERDRAW_JSPLOT 300, will increase with every call</li><li>CLICKFILL_CANVAS 400, will increase with every call/click</li><li>BOXPLOT_CANVAS 500, will increase with every call</li></ul>
		784	*/
		785	break;
		786	case CENTERED:
		787	use_offset = 4;
		788	/*
18556	bpr	789	@ centered
		790	@ keyword ; to place the text centered (in width and height) on the text coordinates(x:y)
		791	@ may be used for text exactly centered on its (x;y)
		792	@ use <a href="#fontfamily">fontfamily</a> for setting the font
		793	@ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the ''drag/drop/onclick-library``)
		794	@%centered%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
18552	bpr	795	*/
18556	bpr	796	break;
18552	bpr	797	case CENTERSTRING:
		798	/*
18556	bpr	799	@ centerstring color,y-value,the text string
		800	@ title color,y-value,the text string
		801	@ draw a string centered on the canvas at y = y-value
		802	@ can not be set ''onclick`` or ''drag xy`` (...)
		803	@ unicode supported: <code>centerstring red,5,\\u2232</code>
		804	@ use a command like <code>fontfamily italic 24pt Arial</code> to set fonts on browser that support font change
		805	@%centerstring%size 400,400%xrange -10,10%yrange -10,10%bgcolor lightblue%fontfamily italic 22pt Courier%centerstring blue,7,the center
18552	bpr	806	*/
		807	js_function[DRAW_CENTERSTRING] = 1;
		808	for(i=0;i<3;i++){
		809	switch(i){
		810	case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		811	case 1: double_data[0] = get_real(infile,0);break; /* y in xrange*/
		812	case 2: temp = get_string_argument(infile,1);
		813	/* draw_text = function(canvas_type,y,font_family,stroke_color,stroke_opacity,text) */
		814	decimals = find_number_of_digits(precision);
18557	bpr	815	tmp_buffer=my_newmem(MAX_BUFFER);
		816	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_centerstring(%d,%.*f,\"%s\",\"%s\",%.2f,\"%s\");\n",canvas_root_id,decimals,double_data[0],font_family,stroke_color,stroke_opacity,temp));
18552	bpr	817	add_to_buffer(tmp_buffer);
		818	break;
		819	default:break;
		820	}
		821	}
		822	break;
		823	case CHEMTEX:
		824	/*
		825	chemtex
		826	keyword...needs to be the first command in the script (even before the ''size`` command)
		827	only for KaTeX enabled typesetting !
		828	will include 80kB large js-library for chemisty typesetting
		829	using <a href="http://85.148.206.56/wims/download/katex.for.wims.tar.gz">KaTeX</a> : <code>katex x,y,\\ce{ chemistry tex code} like : \\ce{ Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2- }</code>
		830	using MathJaX : <code>latex x,y,\\ce{ chemistry tex code} like : \\ce{ Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2- }</code>
		831	see https://mhchem.github.io/MathJax-mhchem/
		832	%chemtex_katex_mathjax%chemtex%size 400,400%xrange -10,10%yrange -10,10%snaptogrid%fontfamily 22px Arial%strokecolor red%drag xy%centered%latex 0,8,\\ce{Hg^2+}%drag xy%centered%latex 0,4,\\ce{\\xrightarrow{\\text{I}^{-}}}%drag xy%centered%latex 0,0,\\ce{HgI2}%centered%drag xy%latex 0,-4,\\ce{\\xrightarrow{\\text{I}^{-}}}%drag xy%centered%latex 0,-8,\\ce{[Hg^{II}I4]^2-}
		833	*/
		834	found_size_command = 1;
		835	fprintf(stdout,"\n<script src=\"scripts/js/KaTeX/mhchem.js\" defer></script>\n");
		836	break;
8386	schaersvoo	837
18552	bpr	838	case CIRCLE:
		839	/*
		840	@ circle xc,yc,width (2*r in pixels),color
		841	@ use command <code>fcircle xc,yc,d,color</code>
		842	@ alternative: disk
		843	@ use command <code>fillcolor color</code> to set the fillcolor
		844	@ may be set <a href='#drag'>draggable</a> / <a href='#onclick'>onclick</a>
		845	@ will shrink / expand on zoom out / zoom in
		846	@%circle%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%drag xy%circle 0,0,60,red%zoom red
		847	*/
		848	for(i=0;i<4;i++){
		849	switch(i){
		850	case 0: double_data[0] = get_real(infile,0);break; /* x */
		851	case 1: double_data[1] = get_real(infile,0);break; /* y */
		852	case 2: double_data[2] = px2x((get_real(infile,0))/2) - px2x(0);break; /* for zoom in/out: radius in 'dx' xrange*/
		853	case 3: stroke_color = get_color(infile,1);/* name or hex color */
		854	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		855	if(use_affine == TRUE ){ transform(2,2);}
		856	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		857	decimals = find_number_of_digits(precision);
18557	bpr	858	tmp_buffer=my_newmem(MAX_BUFFER);
		859	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.f],[%.f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],double_data[2],double_data[2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	860	add_to_buffer(tmp_buffer);
		861	if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		862	dragstuff[13] = 1;
		863	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		864	reset();
		865	break;
		866	default : break;
		867	}
		868	}
		869	break;
		870	case CIRCLES:
		871	/*
		872	@ circles color,xc1,yc1,r1,xc2,yc2,r2...xc_n,yc_n,r_n
		873	@ <b>attention</b> r = radius in x-range (!)
		874	@ use keyword <code>filled</code> or command <code>fcircles</code> to produce solid circles
		875	@ alternative: disks
		876	@ use command <code>fillcolor color</code> to set the fillcolor
		877	@ may be set <a href='#drag'>draggable</a> / <a href='#onclick'>onclick</a> (individually)
		878	@ will shrink / expand on zoom out / zoom in
		879	@%circles_drag%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%drag xy%circles blue,0,0,2,2,2,3,-3,-3,3,3,3,4,3,-4,2%zoom red
		880	@%circles_onclick%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%onclick%circles blue,0,0,2,2,2,3,-3,-3,3,3,3,4,3,-4,2%zoom red
		881	@%circles_drag_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%# Click circles(s) to activate%opacity 200,50%fillcolor orange%rotationcenter 2,3%slider 0,2pi,300,30,angle degrees,Rotate%slider -5,5pi,300,30,x display,move in x-direction%slider -10,10*pi,300,30,y display,move in y-direction%fcircles blue,0,0,0.5,2,2,1,-3,-3,1.5,3,3,0.5,3,-4,0.5
		882	*/
		883	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		884	fill_color = stroke_color;
		885	i=1;
		886	while( ! done ){ /* get next item until EOL*/
		887	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		888	switch (i%3){
		889	case 1:double_data[i-1] = get_real(infile,0);break; /* x */
		890	case 2:double_data[i-1] = get_real(infile,0);break; /* y */
		891	case 0:double_data[i-1] = get_real(infile,1);break; /* r */
		892	}
		893	i++;
		894	}
		895	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,3);}
		896	if(use_affine == TRUE ){ transform(i-1,3);}
		897	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
8386	schaersvoo	898
18552	bpr	899	decimals = find_number_of_digits(precision);
		900	for(c = 0 ; c < i-1 ; c = c+3){
18557	bpr	901	tmp_buffer=my_newmem(MAX_BUFFER);
		902	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.f],[%.f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[c+2],double_data[c+2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	903	add_to_buffer(tmp_buffer);
		904	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		905	}
		906	reset();
		907	dragstuff[13] = 1;
		908	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		909	break;
		910	case CLEARBUTTON:
		911	/*
18556	bpr	912	@ clearbutton value
		913	@ alternative: delete
		914	@ alternative: erase
		915	@ adds a button to clear the <a href="#userdraw">userdraw</a> canvas with text ''value``
18572	bpr	916	@ <b>attention</b> command <code>clearbutton</code> is incompatible with <a href="#multidraw">multidraw</a> based drawings<br>(in <code>multidraw</code> there is always a remove_object_button for every draw primitive)
18556	bpr	917	@ normally <a href="#userdraw">userdraw</a> primitives have the option to use middle/right mouse button on<br> a point of the object to remove this specific object...this clear button will remove all drawings
		918	@ uses the tooltip placeholder div element: may not be used with command <code>intooltip</code>
		919	@ use command <a href="#css">css</a> to style the button...
		920	@ the clearbutton will have id="canvas_scripts[%d]" ; starting with %d=0 for the first script<br>to change the style of all ''clearbutton`` of all included canvasdraw scripts, use something like<br><code>if(document.getElementById("clearbutton"+canvas_scripts[0])){<br> var p = 0;<br> while(document.getElementById("clearbutton"+canvas_scripts[p])){<br>  document.getElementById("clearbutton"+canvas_scripts[p]).className="some_class_name";<br>  <!−−</code> or <code>document.getElementById("clearbutton"+canvas_scripts[p]).setAttribute("style","some_style"); −−><br>  p++;<br> };<br>};</code>
		921	@%clearbutton%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%userdraw circles,red%clearbutton Remove All
18552	bpr	922	*/
		923	if(reply_format == 29){/* eg multidraw is selected */
		924	// canvas_error("command clearbutton incompatible with multidraw...only suitable for userdraw");
		925	}
		926	add_clear_button(css_class,get_string(infile,1));
		927	break;
		928	case CLOCK:
		929	/*
		930	@ clock x,y,r(px),H,M,S,type hourglass,interactive [ ,H_color,M_color,S_color,background_color,foreground_color ]
		931	@ use command <code>opacity stroke-opacity,fill-opacity</code> to adjust foreground (stroke) and background (fill) transparency
		932	@ type hourglass:<br>type = 0: only segments<br>type = 1: only numbers<br>type = 2: numbers and segments
		933	@ colors are optional: if not defined, default values will be used<br>default colours: clock 0,0,60,4,35,45,1,2<br>custom colours: clock 0,0,60,4,35,45,1,2,,,,yellow,red<br>custom colours: clock 0,0,60,4,35,45,1,2,white,green,blue,black,yellow
		934	@ if you don't want a seconds hand (or minutes...), just make it invisible by using the background color of the hourglass...
		935	@ interactive <ul><li>0: not interactive, just clock(s)</li><li>1: function read_canvas() will read all active clocks in H:M:S format<br>The active clock(s) can be adjusted by pupils</li><li>2: function read_canvas() will return the clicked clock <br>(like multiplechoice; first clock in script in nr. 0 )</li><li>3: no prefab buttons...create your own buttons (or other means) to make the clock(s) adjustable by javascript function set_clock(num,type,diff)<br>wherein: num = clock id (starts with 0) ; type = 1 (hours) ; type = 2 (minutes) ; type = 3 (seconds) <br>and diff = the increment of 'type' (positive or negative)</li></ul>
		936	@ canvasdraw will not check validity of colornames...the javascript console is your best friend
		937	@ no combinations with other reply_types allowed, for now
		938	@ if interactive is set to ''1``, 6 buttons per clock will be displayed for adjusting a clock (H+ M+ S+ H- M- S-)<br> set_clock(clock_id,type,incr) <br>first clock has clock_id=0 ; type: H=1,M=2,S=3 ; incr: increment integer
		939	@ note: if you need multiple -interactive- clocks on a webpage, use multiple ''clock`` commands in a single script !<br>and <i>not multiple canvas scripts</i> in a single page
		940	@ note: clocks will not zoom or pan, when using command <a href='#zoom'>zoom</a>
		941	@%clock_1%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,0,0,red,green,blue,lightgrey,black
		942	@%clock_2%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,1,1,red,green,blue,lightgrey,black
		943	@%clock_3%size 400,400%xrange -10,10%yrange -10,10%clock -5,0,80,4,35,45,2,2,red,green,blue,lightgrey,black%clock 5,0,80,3,15,65,2,2,red,green,blue,lightgrey,black
		944	@%clock_4%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,0,0,red,green,blue,lightgrey,black
		945	@%clock_5%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,1,1,red,green,blue,lightgrey,black
		946	@%clock_6%size 400,400%xrange -10,10%yrange -10,10%clock -5,0,80,4,35,45,2,2,red,green,blue,lightgrey,black%clock 5,0,80,8,55,15,2,2,red,green,blue,lightgrey,black
		947	@%clock_7%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,2,0,red,green,blue,lightgrey,black
		948	*/
		949	js_function[DRAW_CLOCK] = 1;
		950	js_function[INTERACTIVE] = 1;
8386	schaersvoo	951
18552	bpr	952	/* var clock = function(xc,yc,radius,H,M,S,h_color,m_color,s_color,bg_color,fg_color) */
		953	for(i=0;i<9;i++){
		954	switch(i){
		955	case 0: int_data[0] = x2px(get_real(infile,0)); break; /* xc */
		956	case 1: int_data[1] = y2px(get_real(infile,0)); break; /* yc */
		957	case 2: int_data[2] = get_real(infile,0);break;/* radius in px */
		958	case 3: int_data[3] = get_real(infile,0);break;/* hours */
		959	case 4: int_data[4] = get_real(infile,0);break;/* minutes */
		960	case 5: int_data[5] = get_real(infile,0);break;/* seconds */
		961	case 6: int_data[6] = get_real(infile,0);if(int_data[6] < 0 \|\| int_data[6] > 2){canvas_error("hourglass can be 0,1 or 2");}break;/* type hourglass */
		962	case 7: int_data[7] = (int)(get_real(infile,1));/* interactive 0,1,2*/
		963	switch(int_data[7]){
		964	case 0:break;
		965	case 1:
		966	if(clock_cnt == 0){
		967	if( reply_format == 0 ){
		968	reply_format = 18; /* user sets clock */
18557	bpr	969	/*
		970	tmp_buffer=my_newmem(MAX_BUFFER);
		971	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "set_clock = function(num,type,diff){var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n"));
18552	bpr	972	add_to_buffer(tmp_buffer);
		973	*/
		974	fprintf(js_include_file,"set_clock = function(num,type,diff){if(wims_status == \"done\"){return;};var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
		975	}
		976	else {
		977	canvas_error("interactive clock may not be used together with other reply_types...");
		978	}
		979	}
		980	fprintf(stdout,"<p style=\"text-align:center\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,1)\" value=\"H+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,1)\" value=\"M+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,1)\" value=\"S+\"><br><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,-1)\" value=\"H−\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,-1)\" value=\"M−\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,-1)\" value=\"S−\"></p>",css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt);
		981	break;
		982	case 3:
		983	if(clock_cnt == 0){
		984	if( reply_format == 0 ){
		985	reply_format = 18; /* user sets clock */
		986	fprintf(js_include_file,"set_clock = function(num,type,diff){if(wims_status == \"done\"){return;};var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,1,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
		987	}
		988	else {
		989	canvas_error("interactive clock may not be used together with other reply_types...");
		990	}
		991	}
		992	/*
		993	fprintf(stdout,"<p style=\"text-align:center\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,1)\" value=\"H+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,1)\" value=\"M+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,1)\" value=\"S+\"><br><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,-1)\" value=\"H−\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,-1)\" value=\"M−\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,-1)\" value=\"S−\"></p>",css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt);
		994	*/
		995	break;
		996	case 2:
		997	if( reply_format == 0 ){
		998	reply_format = 19; /* "onclick */
		999	js_function[INTERACTIVE] = 1;
		1000	fprintf(js_include_file,"\n/* begin onclick handler for clocks */\nvar reply = new Array();canvas_div.addEventListener( 'mousedown', user_click,false);\n\nfunction user_click(evt){if(evt.button == 1){var canvas_rect = clock_canvas.getBoundingClientRect();var x = evt.clientX - canvas_rect.left;var y = evt.clientY - canvas_rect.top;var p = 0;var name;var t = true;while(t){try{name = eval('clocks'+p);if( x < name.xc + name.radius && x > name.xc - name.radius ){if( y < name.yc + name.radius && y > name.yc - name.radius ){reply[0] = p;name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,\"lightblue\",name.fg_color);};}else{clock_ctx.clearRect(name.xc-name.radius,name.yc-name.radius,name.xc+name.radius,name.yc+name.radius);name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};p++;}catch(e){t=false;};};};};\n");
		1001	}
		1002	else {
		1003	if( reply_format != 19){
		1004	canvas_error("clickable clock(s) may not be used together with other reply_types...");
		1005	}
		1006	}
		1007	break;
		1008	default: canvas_error("interactive must be set 0,1 or 2");break;
		1009	}
		1010	break;
		1011	case 8:
		1012	if(clock_cnt == 0 ){ /* set opacity's just once .... it should be a argument to clock(), for now it's OK */
		1013	fprintf(js_include_file,"var clock_bg_opacity = %.2f;var clock_fg_opacity = %.2f;",fill_opacity,stroke_opacity);
		1014	}
		1015	temp = get_string(infile,3);/* optional colors, like: ,,red,,blue*/
		1016	if( strstr( temp,",") != 0 ){ temp = str_replace(temp,",","\",\""); }
		1017	else{
		1018	/* h_color,m_color,s_color,bg_color,fg_color */
		1019	temp = ",black\",\"black\",\"black\",\"white\",\"black";}
18557	bpr	1020	tmp_buffer=my_newmem(MAX_BUFFER);
		1021	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "clocks%d = new clock(%d,%d,%d,%d,%d,%d,%d,%d,\"%s\");\n",clock_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],temp));
18552	bpr	1022	add_to_buffer(tmp_buffer);
		1023	fprintf(js_include_file,"var clocks%d;",clock_cnt);
		1024	clock_cnt++;
		1025	break;
		1026	default:break;
		1027	}
		1028	}
		1029	break;
		1030	case COLORPALETTE:
		1031	/*
18556	bpr	1032	@ colorpalette color_name_1,color_name_2,...,color_name_8
		1033	@ opacity will be the same for all colors and is set by command <a href="#opacity">opacity [0-255],[0-255]</a>
		1034	@ can be used with command <a href='#userdraw'>userdraw clickfill,color</a> when more than one fillcolor is wanted.<br>in that case use for example <a href='#replyformat'>replyformat 10</a> ... reply=x1:y1:color1,x2:y2:color2...<br>the pupil can choose from the given colors by clicking small coloured buttons.<br> the click coordinates and corresponding fillcolor will be stored in read_canvas()...when using the appropriate replyformat.<br>the first color of the palette is color=0
		1035	@ make sure to include the ''remove button`` by using command <a href='#clearbutton'>clearbutton some_text</a>
18552	bpr	1036	*/
		1037	if( use_tooltip == 1 ){canvas_error("command 'colorpalette' is incompatible with command 'intooltip tip_text'");}
		1038	fprintf(js_include_file,"var multifillcolors = [];var palettecolors = [");
		1039	while( ! done ){
		1040	temp = get_color(infile,1);
		1041	fprintf(js_include_file,"\"%s\",",temp);
		1042	}
		1043	fprintf(js_include_file,"];");/* add black to avoid trouble with dangling comma... */
		1044	add_color_palette(css_class);
		1045	break;
15111	schaersvoo	1046
18552	bpr	1047	case COMMENT:
		1048	sync_input(infile);
		1049	break;
11806	schaersvoo	1050
18552	bpr	1051	case COPY:
		1052	/*
		1053	@ copy x,y,x1,y1,x2,y2,[filename URL]
		1054	@ The image may be "bitmap" or "SVG"
		1055	@ Insert the region from (x1,y1) to (x2,y2) (in pixels) of [filename] to (x,y) in x/y-range
		1056	@ If x1=y1=x2=y2=-1, the whole [filename URL] is copied.
		1057	@ [filename] is the URL of the image
		1058	@ <em>TODO:move special image functions to generic 'dragstuff' library</em>
		1059	@ URL is normal URL of network reachable image file location
		1060	@ if command <a href="#drag">drag x/y/xy</a> is set before command ''copy``, the images will be draggable<br>javascript function read_canvas(); will return the x/y coordinate data in xrange/yrange of all -including non draggable- images<br>the command drag is only valid for the next image<br>draggable / non-draggable images may be mixed<br>may be used together with preceding keywords ''snaptogrid``, ''xsnaptogrid``, ''ysnaptogrid`` or <code>snaptopoints x1,y1,x2,y2...</code>.
		1061	@ if keyword <a href="#onclick">onclick</a> is set before command ''copy`` the image(s) is clickable (marked with a green rectangle around the image)<br>use 'read_dragdrop' to get the number of the clicked image(s)<br>use command 'clearbutton some_text' to reset the reply/click array.<br>example: 4 images; student clicked on image 2 and 3: reply = 0,1,1,0<br>after clicking the clear button: reply = 0,0,0,0<br>May be mixed with commands ''drag x\|y\|xy`` (use javascript read_canvas to get the new coordinates
		1062	@ ''onclick`` for external images may be mixed with canvas generated stuff (like lines,curves, embeded XML etc)
		1063	@ you may draw / userdraw / drag other stuff on top of an "imported" image
		1064	@ the use of a slider is not possible: if needed, use command <a href='#html'>html x,y,<img src=my_image.svg /> </a>
		1065	@ use keyword <a href='#centered'>centered</a> before command ''copy`` to place image center at given coordinates.
		1066	@%copy_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%copy -5,5,-1,-1,-1,-1,gifs/fr.gif%onclick%copy 5,5,-1,-1,-1,-1,gifs/en.gif%onclick%copy 5,-5,-1,-1,-1,-1,gifs/it.gif%onclick%copy -5,-5,-1,-1,-1,-1,gifs/cn.gif
		1067	@%copy_drag_xy%size 400,400%xrange -10,10%yrange -10,10%# attention: left mouse click on the image will activate dragging...%# keep left mouse button pressed while moving the image !%drag xy%copy -5,5,-1,-1,-1,-1,gifs/fr.gif%drag xy%copy 5,5,-1,-1,-1,-1,gifs/en.gif%drag xy%copy 5,-5,-1,-1,-1,-1,gifs/it.gif%drag xy%copy -5,-5,-1,-1,-1,-1,gifs/cn.gif
		1068	@%copy_drag_xy_snaptogrid%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%# attention: left mouse click on the image will activate dragging...%# keep left mouse button pressed while moving the image !%drag xy%# a function read_canvas_images() %copy -6,6,-1,-1,-1,-1,gifs/fr.gif%snaptogrid%drag xy%copy 6,6,-1,-1,-1,-1,gifs/en.gif%snaptogrid%drag xy%copy 6,-6,-1,-1,-1,-1,gifs/it.gif%snaptogrid%drag xy%copy -6,-6,-1,-1,-1,-1,gifs/cn.gif
		1069	*/
		1070	for(i = 0 ; i<7;i++){
		1071	switch(i){
		1072	case 0: double_data[0]=get_real(infile,0);break; /* x left top corner in x/y range */
		1073	case 1: double_data[1]=get_real(infile,0);break; /* y left top corner in x/y range */
		1074	case 2: int_data[2]=(int)(get_real(infile,0));break;/* x1 in px of external image */
		1075	case 3: int_data[3]=(int)(get_real(infile,0));break;/* y1 in px of external image */
		1076	case 4: int_data[4]=(int)(get_real(infile,0));break;/* x2 --> width */
		1077	case 5: int_data[5]=(int)(get_real(infile,0)) ;break;/* y2 --> height */
		1078	case 6: URL = get_string(infile,1);
		1079	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		1080	if(use_affine == TRUE ){transform(2,2);}
		1081	int_data[0] = x2px(double_data[0]);
		1082	int_data[1] = y2px(double_data[1]);
		1083	int_data[6] = int_data[4] - int_data[2];/* swidth & width (if not scaling )*/
		1084	int_data[7] = int_data[5] - int_data[3];/* sheight & height (if not scaling )*/
		1085	if( onclick == 0 ){ /* no mouse needed static image copy */
		1086	if(js_function[DRAW_EXTERNAL_IMAGE] == 0){/* create canvas just once */
		1087	fprintf(js_include_file,"var image_copy_canvas = create_canvas%d(%d,xsize,ysize);",canvas_root_id,STATIC_IMAGE_CANVAS);
		1088	js_function[DRAW_EXTERNAL_IMAGE] = 1;
		1089	}
18557	bpr	1090	tmp_buffer=my_newmem(MAX_BUFFER);
		1091	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],use_offset,int_data[10]));
18552	bpr	1092	}
		1093	else /* onclick or drag & drop external copy images */
		1094	{
		1095	js_function[DRAG_EXTERNAL_IMAGE] = 1;
18557	bpr	1096	tmp_buffer=my_newmem(MAX_BUFFER);
		1097	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]));
18552	bpr	1098	}
		1099	add_to_buffer(tmp_buffer);
		1100	object_cnt++;
		1101	break;
		1102	default: break;
		1103	}
		1104	}
		1105	reset();
		1106	break;
11806	schaersvoo	1107	/*
		1108	HTML5 specs:
		1109	context.drawImage(img,sx,sy,swidth,sheight,x,y,width,height);
18552	bpr	1110	img Specifies the image, canvas, or video element to use
		1111	sx The x coordinate where to start clipping: x1 = int_data[0]
		1112	sy The y coordinate where to start clipping: x2 = int_data[1]
		1113	swidth The width of the clipped image: int_data[2] - int_data[0]
14066	bpr	1114	sheight The height of the clipped image: int_data[3] - int_data[1]
18552	bpr	1115	x The x coordinate where to place the image on the canvas: dx1 = int_data[4]
		1116	y The y coordinate where to place the image on the canvas: dy1 = int_data[5]
		1117	width The width of the image to use (stretch or reduce the image): dx2 - dx1 = int_data[6]
		1118	height The height of the image to use (stretch or reduce the image): dy2 - dy1 = int_data[7]
11806	schaersvoo	1119	*/
18552	bpr	1120	case COPYRESIZED:
		1121	/*
		1122	@ copyresized x1,y2,x2,y2,dx1,dy1,dx2,dy2,image_file_url
		1123	@ The image may be any "bitmap" or "SVG"
		1124	@ Insert the region from (x1,y1) to (x2,y2) (in pixels) of [ filename], <br>possibly resized,<br>to the region of (dx1,dy1) to (dx2,dy2) in x/y-range
		1125	@ (dx1:dy1) must be left top corner; (dx2:dy2) must be right bottom corner of inserted image
		1126	@ If x1=y1=x2=y2=-1, the whole [filename / URL ] is copied and resized.
		1127	@ URL is normal URL of network reachable image file location<br>(as seen from public_html-root or network reachable 'http://some_server/my_images/test.gif'<br>(eg no special wims paths are searched !!)
		1128	@ if command <a href="#drag">drag x/y/xy</a> is set before command ''copy``, the images will be draggable<br>javascript function read_canvas(); will return the x/y coordinate data in xrange/yrange of all -including non draggable- images<br>the command drag is only valid for the next image<br>draggable / non-draggable images may be mixed<br>may be used together with preceding keywords ''snaptogrid``,''xsnaptogrid``,''ysnaptogrid`` or <code>snaptopoints x1,y1,x2,y2...</code>
		1129	@ if keyword <a href="#onclick">onclick</a> is set before command ''copy`` the image(s) is clickable (marked with a green rectangle around the image)<br>use ''read_dragdrop`` to get the number of the clicked image(s)<br>use command 'clearbutton some_text' to reset the reply/click array.<br>example: 4 images; student clicked on image 2 and 3: reply = 0,1,1,0<br>after clicking the clear button: reply = 0,0,0,0<br>May be mixed with commands ''drag x\|y\|xy`` (use javascript read_canvas to get the new coordinates
		1130	@ ''onclick`` for external images may be mixed with canvas generated stuff (like lines,curves etc)
		1131	@ you may draw / userdraw / drag stuff on top of an "imported" image
		1132	@ when set draggable, there will be special function 'read_canvas_images()'<br>now dragging external images may be combined with 'read_canvas()' from <a href='#userdraw'>userdraw</a> or <a href='#multidraw'>multidraw</a><br>set command <a href='#precision'>precision</a> before command ''copy``
		1133	@ use keyword <a href='#centered'>centered</a> before command 'copyresized' to place image center at given coordinates.
		1134	@ <em>TODO:move special image functions to generic 'dragstuff' library</em>
		1135	*/
		1136	for(i = 0 ; i<9;i++){
		1137	switch(i){
		1138	case 0: int_data[0] = (int)(get_real(infile,0));break; /* x1 */
		1139	case 1: int_data[1] = (int)(get_real(infile,0));break; /* y1 */
		1140	case 2: int_data[2] = (int)(get_real(infile,0));break;/* x2 */
		1141	case 3: int_data[3] = (int)(get_real(infile,0));break;/* y2 */
		1142	case 4: int_data[4] = x2px(get_real(infile,0));break;/* dx1 */
		1143	case 5: int_data[5] = y2px(get_real(infile,0));break;/* dy1 */
		1144	case 6: int_data[6] = x2px(get_real(infile,0));break;/* dx2 */
		1145	case 7: int_data[7] = y2px(get_real(infile,0));break;/* dy2 */
		1146	case 8: URL = get_string(infile,1);
		1147	if( int_data[1] == -1 ){ int_data[10] = 1; }else{int_data[10] = 0; }/* resized / not resized */
		1148	/* flag error when wrong diagonal: copyresized -1,-1,-1,-1,0,0,7,7,testfig.gif */
		1149	if( int_data[7] < int_data[5] \|\| int_data[6] < int_data[4]){
		1150	canvas_error("in copyresized, use:<br>left top corner (dx1:dy1) and right bottom corner (dx2:dy2) ! ");
		1151	}
		1152	int_data[2] = abs(int_data[2] - int_data[0]);/* swidth */
		1153	int_data[3] = abs(int_data[3] - int_data[1]);/* sheight */
		1154	int_data[6] = abs(int_data[6] - int_data[4]);/* width */
		1155	int_data[7] = abs(int_data[7] - int_data[5]);/* height */
		1156	if( onclick == 0 ){ /* no mouse needed static image copy */
		1157	if(js_function[DRAW_EXTERNAL_IMAGE] == 0){
		1158	fprintf(js_include_file,"var image_copy_canvas = create_canvas%d(%d,xsize,ysize);",canvas_root_id,STATIC_IMAGE_CANVAS);
		1159	js_function[DRAW_EXTERNAL_IMAGE] = 1;
		1160	}
18557	bpr	1161	tmp_buffer=my_newmem(MAX_BUFFER);
		1162	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],use_offset,int_data[10]));
18552	bpr	1163	}
		1164	else /* onclick or drag & drop external copy images */
		1165	{
		1166	js_function[DRAG_EXTERNAL_IMAGE] = 1;
18557	bpr	1167	tmp_buffer=my_newmem(MAX_BUFFER);
		1168	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]));
18552	bpr	1169	object_cnt++;
		1170	}
		1171	add_to_buffer(tmp_buffer);
		1172	break;
		1173	default: break;
		1174	}
		1175	}
		1176	reset();
		1177	break;
8386	schaersvoo	1178
18552	bpr	1179	case CROSSHAIR:
		1180	/*
		1181	@ crosshair x,y,color
		1182	@ draw a single crosshair point at (x;y) in color ''color``
		1183	@ use command <code>crosshairsize int</code> and / or <code>linewidth int</code> to adjust
		1184	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1185	@%crosshair%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 2%onclick%crosshair 0,0,red%linewidth 1%onclick%crosshair 1,1,blue%linewidth 3%onclick%crosshair 3,3,green%linewidth 4%xrosshair 4,4,orange
		1186	*/
		1187	for(i=0;i<3;i++){
		1188	switch(i){
		1189	case 0: double_data[0] = get_real(infile,0);break; /* x */
		1190	case 1: double_data[1] = get_real(infile,0);break; /* y */
		1191	case 2: stroke_color = get_color(infile,1);/* name or hex color */
		1192	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		1193	if(use_affine == TRUE ){ transform(2,2);}
		1194	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1195	decimals = find_number_of_digits(precision);
18557	bpr	1196	tmp_buffer=my_newmem(MAX_BUFFER);
		1197	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.f],[%.f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1198	add_to_buffer(tmp_buffer);
		1199	if(onclick != 0){object_cnt++;}
		1200	/* object_cnt++ */
		1201	reset();
		1202	dragstuff[7] = 1;
		1203	break;
		1204	default:break;
		1205	}
		1206	}
		1207	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1208	break;
11806	schaersvoo	1209
18552	bpr	1210	case CROSSHAIRS:
		1211	/*
		1212	@ crosshairs color,x1,y1,x2,y2,...,x_n,y_n
		1213	@ draw multiple crosshair points at given coordinates in color ''color``
		1214	@ use command <code>crosshairsize int</code> and / or <code>linewidth int</code> to adjust
		1215	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		1216	@%crosshairs_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%snaptogrid%linewidth 2%drag xy%crosshairs red,0,0,1,1,2,2,3,3%drag x%crosshairs blue,0,1,1,2,2,3,3,4
		1217	@%crosshairs_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 2%onclick%crosshairs red,0,0,1,1,2,2,3,3%onclick%crosshairs blue,0,1,1,2,2,3,3,4
12107	schaersvoo	1218	*/
18552	bpr	1219	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		1220	fill_color = stroke_color;
		1221	i=0;
		1222	while( ! done ){ /* get next item until EOL*/
		1223	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		1224	if(i%2 == 0 ){
		1225	double_data[i] = get_real(infile,0); /* x */
		1226	}
		1227	else {
		1228	double_data[i] = get_real(infile,1); /* y */
		1229	}
		1230	i++;
		1231	}
		1232	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		1233	if(use_affine == TRUE ){ transform(i-1,2);}
		1234	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1235	decimals = find_number_of_digits(precision);
		1236	for(c=0 ; c < i-1 ; c = c+2){
18557	bpr	1237	tmp_buffer=my_newmem(MAX_BUFFER);
		1238	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.f],[%.f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1239	add_to_buffer(tmp_buffer);
		1240	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		1241	}
		1242	dragstuff[7] = 1;
		1243	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1244	reset();
		1245	break;
		1246	case CROSSHAIRSIZE:
		1247	/*
		1248	@ crosshairsize int
		1249	@ default 8 (px)
		1250	*/
		1251	crosshair_size = (int) (get_real(infile,1));
		1252	break;
		1253	case CSS:
		1254	/*
		1255	@ css css_class
		1256	@ may be used before any ''style-able`` html object (like inputfields or buttons) or some html objects that are generated by some canvasdraw commands
		1257	@ in case of <a href="#multidraw">multidraw</a> this command must be a table css class, for example "wimstable"
		1258	@%css%size 400,400%xrange -10,10%yrange -10,10%css wims_button_help%input 0,0,10,1,Hello
		1259	*/
		1260	css_class = get_string(infile,1);
		1261	break;
		1262	case CURSOR:
		1263	/*
		1264	@ cursor some CSS cursor_style
		1265	@ alternative: pointer
		1266	@ style can be any valid CSS property value
		1267	@ choose from these types:<br>alias,all-scroll,auto,cell,context-menu,col-resize,copy,crosshair,default,e-resize,<br>ew-resize,grab,grabbing,help,move,n-resize,ne-resize,nesw-resize,ns-resize,nw-resize,<br>nwse-resize,no-drop,none,not-allowed,pointer,progress,row-resize,s-resize,se-resize,<br>sw-resize,text,url(myBall.cur),auto,vertical-text,w-resize,wait,zoom-in,zoom-out,initial
		1268	@ note: wims will not check the validity of your cursor declaration
		1269	@%cursor_css%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 3%drag xy%opacity 200,75%fcircles blue,-5,5,3,-4,-2,6,0,0,5,3,4,2,4,-5,4
		1270	*/
		1271	fprintf(js_include_file,"canvas_div%d.style.cursor = \"%s\";",canvas_root_id,get_string(infile,1));
		1272	break;
		1273	case CURVE:
		1274	/*
18556	bpr	1275	@ curve color,formula(x)
		1276	@ alternative: plot
18572	bpr	1277	@ use command <a href="#trange">trange</a> in parametric functions before <b>every</b> command curve / plot <code>trange -pi,pi<br>curve color,formula1(t),formula2(t)</code><br>A next parametric curve will only be correctly plot when trange is set again !<br>this is a design flaw and not a feature...
18556	bpr	1278	@ use command <a href="#precision">precision</a> to increase the number of digits of the plotted points
		1279	@ use command <a href="#plotsteps">plotsteps</a> to increase / decrease the amount of plotted points (default 150)
		1280	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1281	@ if you need a plot beyond xrange / yrange, use <a href="#jsplot">jsplot</a> (command ''curve`` will only calculate points within the xrange)
18569	bpr	1282	@%curve%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 1%grid 2,2,grey,2,2,6,grey%precision 1000%curve red,4sqrt(x)%curve green,2sqrt(abs(x))%curve blue,31/sqrt(x)%curve orange,4sin(4/x)%dashed%curve red,4*cos(x)
18552	bpr	1283	*/
		1284	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
11806	schaersvoo	1285
18552	bpr	1286	if( use_parametric == TRUE ){ /* parametric color,fun1(t),fun2(t)*/
		1287	use_parametric = FALSE;
		1288	stroke_color = get_color(infile,0);
		1289	char *fun1 = get_string_argument(infile,0);
		1290	char *fun2 = get_string_argument(infile,1);
		1291	if( strlen(fun1) == 0 \|\| strlen(fun2) == 0 ){canvas_error("parametric functions are NOT OK !");}
18557	bpr	1292	tmp_buffer=my_newmem(MAX_BUFFER);
		1293	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_parametric(xsize,ysize,fun1,fun2,xmin,xmax,ymin,ymax,tmin,tmax,plot_steps,precision,rotationcenter),2line_width,2line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1294	add_to_buffer(tmp_buffer);
		1295	}
		1296	else{
		1297	stroke_color = get_color(infile,0);
		1298	char *fun1 = get_string_argument(infile,1);
		1299	if( strlen(fun1) == 0 ){canvas_error("function is NOT OK !");}
18557	bpr	1300	tmp_buffer=my_newmem(MAX_BUFFER);
		1301	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,rotationcenter),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1302	add_to_buffer(tmp_buffer);
		1303	}
		1304	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		1305	dragstuff[9] = 1;
		1306	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1307	reset();
		1308	break;
		1309	case CURVEDARROW:
14038	schaersvoo	1310	/*
18556	bpr	1311	@ curvedarrow x1,y1,xc,yc,x2,y2,color
		1312	@ draw a single headed curved arrow from (x1:y1) in direction of (xc:yc) to point (x2:y2)<br> note: the curve will <b>not go through</b> point (xc:yc)
		1313	@ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
		1314	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		1315	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1316	@%curvedarrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrow -5,0,0,10,5,0,blue
		1317	@%curvedarrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrow -5,0,0,-10,5,0,blue%onclick%curvedarrow -8,0,0,5,8,3,green
11806	schaersvoo	1318
14029	schaersvoo	1319	h[0] = arrowhead
14066	bpr	1320	h[1] = type: 1 = single 2=double arrow
15111	schaersvoo	1321	function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
14038	schaersvoo	1322	*/
18552	bpr	1323	for(i=0;i<7;i++){
		1324	switch(i){
		1325	case 0: double_data[0] = get_real(infile,0);break; /* x1 */
		1326	case 1: double_data[1] = get_real(infile,0);break; /* y1 */
		1327	case 2: double_data[2] = get_real(infile,0);break; /* xc */
		1328	case 3: double_data[3] = get_real(infile,0);break; /* yc */
		1329	case 4: double_data[4] = get_real(infile,0);break; /* y3 */
		1330	case 5: double_data[5] = get_real(infile,0);break; /* y3 */
		1331	case 6: stroke_color = get_color(infile,1);/* name or hex color */
		1332	if(use_rotate == TRUE ){rotate(6,angle,rotationcenter,2);}
		1333	if(use_affine == TRUE ){ transform(6,2);}
		1334	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1335	decimals = find_number_of_digits(precision);
18557	bpr	1336	tmp_buffer=my_newmem(MAX_BUFFER);
		1337	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.f,%.f,%.f],[%.f,%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1338	add_to_buffer(tmp_buffer);
		1339	if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		1340	reset();
		1341	break;
		1342	}
		1343	}
		1344	dragstuff[21] = 1;
		1345	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1346	break;
		1347	case CURVEDARROW2:
14038	schaersvoo	1348	/*
18556	bpr	1349	@ curvedarrow2 x1,y1,xc,yc,x2,y2,color
		1350	@ draw a double headed curved arrow from (x1:y1) in direction of (xc:yc) to point (x2:y2)<br> note: the curve will <b>not go through</b> point (xc:yc)
		1351	@ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
		1352	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		1353	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1354	@%curvedarrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrow2 -5,0,0,10,5,0,blue
18569	bpr	1355	@%curvedarrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrow2 -5,0,0,-10,5,0,blue%onclick%curvedarrow -8,0,0,5,8,3,green
14029	schaersvoo	1356
		1357	h[0] = arrowhead
14066	bpr	1358	h[1] = type: 1 = single 2=double arrow
15111	schaersvoo	1359	function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
14038	schaersvoo	1360	*/
18552	bpr	1361	for(i=0;i<7;i++){
		1362	switch(i){
		1363	case 0: double_data[0] = get_real(infile,0);break; /* x1 */
		1364	case 1: double_data[1] = get_real(infile,0);break; /* y1 */
		1365	case 2: double_data[2] = get_real(infile,0);break; /* xc */
		1366	case 3: double_data[3] = get_real(infile,0);break; /* yc */
		1367	case 4: double_data[4] = get_real(infile,0);break; /* y3 */
		1368	case 5: double_data[5] = get_real(infile,0);break; /* y3 */
		1369	case 6: stroke_color = get_color(infile,1);/* name or hex color */
		1370	if(use_rotate == TRUE ){rotate(6,angle,rotationcenter,2);}
		1371	if(use_affine == TRUE ){ transform(6,2);}
		1372	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1373	decimals = find_number_of_digits(precision);
18557	bpr	1374	tmp_buffer=my_newmem(MAX_BUFFER);
		1375	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.f,%.f,%.f],[%.f,%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1376	add_to_buffer(tmp_buffer);
		1377	if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		1378	dragstuff[21] = 1;
		1379	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1380	reset();
		1381	break;
		1382	}
		1383	}
		1384	break;
		1385	case CURVEDARROWS:
14038	schaersvoo	1386	/*
18556	bpr	1387	@ curvedarrows color,x1,y1,xc,yc,x2,y2,...,x_(n-1),y_(n-1),xc,yc,x_n,y_n
		1388	@ draw curved arrows from (x1:y1) in direction of (xc:yc) to point (x2:y2), etc<br> note: the curve will <b>not go through</b> point (xc:yc)
		1389	@ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
		1390	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		1391	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1392	@%curvedarrows_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrows red,-8,0,0,8,8,0,-5,5,0,-10,6,3
		1393	@%curvedarrows_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrows red,-8,0,0,8,8,0,-5,5,0,-10,6,3
14029	schaersvoo	1394
14030	schaersvoo	1395	h[0] = arrowhead
14066	bpr	1396	h[1] = type: 1 = single 2=double arrow
15111	schaersvoo	1397	function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
14038	schaersvoo	1398	*/
18552	bpr	1399	stroke_color = get_color(infile,0);/* name or hex color */
		1400	i = 0;
		1401	decimals = find_number_of_digits(precision);
		1402	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1403	while( ! done ){
		1404	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		1405	double_data[0] = get_real(infile,0); /* x1 */
		1406	double_data[1] = get_real(infile,0); /* y1 */
		1407	double_data[2] = get_real(infile,0); /* xc */
		1408	double_data[3] = get_real(infile,0); /* yc */
		1409	double_data[4] = get_real(infile,0); /* x3 */
		1410	double_data[5] = get_real(infile,1); /* y3 */
18557	bpr	1411	tmp_buffer=my_newmem(MAX_BUFFER);
		1412	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.f,%.f,%.f],[%.f,%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1413	add_to_buffer(tmp_buffer);
		1414	if(onclick != 0){object_cnt++;}
		1415	i = i + 6;
		1416	}
		1417	if(use_rotate == TRUE ){rotate(i-6,angle,rotationcenter,2);}
		1418	if(use_affine == TRUE ){ transform(i-6,2);}
		1419	dragstuff[21] = 1;
		1420	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1421	reset();
		1422	break;
		1423	case CURVEDARROWS2:
14038	schaersvoo	1424	/*
18556	bpr	1425	@ curvedarrows2 color,x1,y1,xc,yc,x2,y2,...x_(n-1),y_(n-1),xc,yc,x_n,y_n
		1426	@ draw double headed curved arrows from (x1:y1) in direction of (xc:yc) to point (x2:y2), etc. <br> note: the curve will <b>not go through</b> point (xc:yc)
		1427	@ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
		1428	@ use command <code>linewidth int</code> to adjust thickness of the arrow
		1429	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1430	@%curvedarrows2_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrows2 red,-8,0,0,8,8,0,-5,5,0,-10,6,3
		1431	@%curvedarrows2_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrow -5,0,0,-10,5,0,blue%onclick%curvedarrows2 red,-8,0,0,8,8,0,-5,5,0,-10,6,3
14030	schaersvoo	1432
		1433	h[0] = arrowhead
14066	bpr	1434	h[1] = type: 1 = single 2=double arrow
15111	schaersvoo	1435	function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
14038	schaersvoo	1436	*/
18552	bpr	1437	stroke_color = get_color(infile,0);/* name or hex color */
		1438	i = 0;
		1439	decimals = find_number_of_digits(precision);
		1440	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1441	while( ! done ){
		1442	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		1443	double_data[0] = get_real(infile,0); /* x1 */
		1444	double_data[1] = get_real(infile,0); /* y1 */
		1445	double_data[2] = get_real(infile,0); /* xc */
		1446	double_data[3] = get_real(infile,0); /* yc */
		1447	double_data[4] = get_real(infile,0); /* x3 */
		1448	double_data[5] = get_real(infile,1); /* y3 */
18557	bpr	1449	tmp_buffer=my_newmem(MAX_BUFFER);
		1450	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.f,%.f,%.f],[%.f,%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1451	add_to_buffer(tmp_buffer);
		1452	if(onclick != 0){object_cnt++;}
		1453	i = i + 6;
		1454	}
		1455	if(use_rotate == TRUE ){rotate(i-6,angle,rotationcenter,2);}
		1456	if(use_affine == TRUE ){ transform(i-6,2);}
		1457	dragstuff[21] = 1;
		1458	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1459	reset();
		1460	break;
		1461	case DASHED:
		1462	/*
		1463	@ dashed
		1464	@ keyword (no arguments required)
		1465	@ next object will be drawn with a dashed line
		1466	@ change dashing scheme by using command <a href="#dashtype">dashtype</a>
		1467	@%dashed%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%line -5,-5,-5,5,red%dashtype 1,1%dline -4,-5,-4,5,green%dashtype 2,2%dline -3,-5,-3,5,blue%dashtype 3,3%dline 0,-5,0,5,orange%dashtype 4,4%dline 3,-5,3,5,brown
		1468	*/
		1469	use_dashed = TRUE;
		1470	break;
		1471	case DASHTYPE:
		1472	/*
		1473	@ dashtype line_width_px,space_width_px
		1474	@ every indiviual object may have its own dashtype, if needed...
		1475	@ When keyword <a href='#dashed'>dashed</a> is set, the objects will be drawn with this dashtype
		1476	@ default value <code>dashtype 2,2</code> e.g. 2px line and 2px space
		1477	@ HTML5 canvas specification supports more arguments (dashing schemes) ... but not all modern browsers are yet capable
		1478	@%dashtype%size 400,400%xrange -10,10%yrange -10,10%dashtype 1,1%dhline 0,9,red%dashtype 2,2%dhline 0,8,red%dashtype 4,4%dhline 0,7,red%dashtype 6,6%dhline 0,6,red%dashtype 8,8%dhline 0,5,red%dashtype 10,10%dhline 0,4,red%dashtype 1,2%dhline 0,3,red%dashtype 2,4%dhline 0,2,red%dashtype 3,6%dhline 0,1,red%dashtype 4,8%dhline 0,0,red%linewidth 2%dashtype 1,1%dhline 0,-9,red%dashtype 2,2%dhline 0,-8,red%dashtype 4,4%dhline 0,-7,red%dashtype 6,6%dhline 0,-6,red%dashtype 8,8%dhline 0,-5,red%dashtype 10,10%dhline 0,-4,red%dashtype 1,2%dhline 0,-3,red%dashtype 2,4%dhline 0,-2,red%dashtype 4,8%dhline 0,-1,red
		1479	*/
		1480	for(i=0;i<2;i++){
		1481	switch(i){
		1482	case 0 : dashtype[0] = (int) line_width*( get_real(infile,0)) ; break;
		1483	case 1 : dashtype[1] = (int) line_width*( get_real(infile,1)) ; break;
		1484	}
		1485	}
		1486	break;
		1487	case DIAMONDFILL:
		1488	/*
		1489	@ diamondfill x0,y0,dx,dy,color
		1490	@ x0,y0 in xrange / yrange
		1491	@ distances dx,dy in pixels
		1492	@ there is also a command <a href="#userdraw">userdraw diamondfill,color</a>
		1493	@%diamondfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%circles red,-4,0,6,4,0,6%linewidth 1%diamondfill 0,0,5,8,blue%diamondfill 0,7,8,8,lightgreen
		1494	*/
		1495	js_function[DRAW_DIAMONDFILL] = 1;
		1496	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1497	js_function[DRAW_FILLTOBORDER] = 1;
		1498	add_js_filltoborder(canvas_type);
		1499	}
		1500	decimals = find_number_of_digits(precision);
		1501	for(i=0;i<5;i++){
		1502	switch(i){
		1503	case 0: double_data[0] = get_real(infile,0); break; /* x */
		1504	case 1: double_data[1] = get_real(infile,0); break; /* y */
		1505	case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		1506	case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		1507	case 4: stroke_color = get_color(infile,1);
		1508	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		1509	if(use_affine == TRUE ){ transform(2,2);}
18573	bpr	1510	/* draw_diamondfill(ctx,x0,y0,dx,dy,linewidth,color,opacity,xsize,ysize) */
18557	bpr	1511	tmp_buffer=my_newmem(MAX_BUFFER);
		1512	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_diamondfill(%d,%.f,%.f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize));
18552	bpr	1513	add_to_buffer(tmp_buffer);
		1514	fill_cnt++;
		1515	reset();
		1516	break;
		1517	default:break;
		1518	}
		1519	}
		1520	break;
		1521	case DOTFILL:
		1522	/*
		1523	@ dotfill x0,y0,dx,dy,color
		1524	@ x0,y0 in xrange / yrange
		1525	@ distances dx,dy in pixels
		1526	@ radius of dots is linewidth
		1527	@ there is also a command <a href="#userdraw">userdraw dotfill,color</a>
		1528	@%dotfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%circles red,-4,0,6,4,0,6%dotfill 0,0,5,8,blue%dotfill 0,7,8,8,lightgreen
		1529	*/
		1530	js_function[DRAW_DOTFILL] = 1;
		1531	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1532	js_function[DRAW_FILLTOBORDER] = 1;
		1533	add_js_filltoborder(canvas_type);
		1534	}
		1535	decimals = find_number_of_digits(precision);
		1536	for(i=0;i<5;i++){
		1537	switch(i){
		1538	case 0: double_data[0] = get_real(infile,0); break; /* x in px */
		1539	case 1: double_data[1] = get_real(infile,0); break; /* y in py */
		1540	case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		1541	case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		1542	case 4: stroke_color = get_color(infile,1);
		1543	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		1544	if(use_affine == TRUE ){ transform(2,2);}
		1545	/* draw_dotfill(ctx,x0,y0,dx,dy,radius,color,opacity,xsize,ysize) */
18557	bpr	1546	tmp_buffer=my_newmem(MAX_BUFFER);
		1547	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_dotfill(%d,%.f,%.f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize));
18552	bpr	1548	add_to_buffer(tmp_buffer);
		1549	fill_cnt++;
		1550	reset();
		1551	break;
		1552	default:break;
		1553	}
		1554	}
		1555	break;
		1556	case DRAG:
		1557	/*
18556	bpr	1558	@ drag [x][y][xy]
		1559	@ the next object will be draggable in x / y / xy direction
		1560	@ the displacement can be read by <code>javascript:read_dragdrop();</code>
		1561	@ the precision (default 2 decimals) in the student reply may be set with command <a href="#precision">precision</a>.<br>Use this 'precision' command before this command 'drag x\|y\|xy' !
		1562	@ <a href='#onclick'>onclick</a> and ''drag x\|y\|xy`` may be combined (for different objects: a single object can either be onclick or drag, not both )
		1563	@ ''multi_objects`` will be numbered in the given x/y-sequence (example: points red,0,0,1,1,2,2,3,3: point (0:0) is object_number 1)
		1564	@ <b>attention</b>: static objects and ''onclick/drag`` objects of the same type (like point,circle,etc) with the same coordinates (e.g. objects that overlap) will give problems in the ''recognition algorithm``) in this example<br> <code>linewidth 4<br>point 0,0,red<br>drag xy<br>point 0,0,blue</code><br>the red point will not be recognised as draggable ! in the example<br><code>linewidth 4<br>drag xy<br>point 0,0,red<br>drag xy<br>point 0,0,blue</code><br>both points will be recognised
		1565	@ the answer is: drag_or_onclick_object_number : Xorg : Yorg : Xnew : Ynew<br>wherein object_number is the sequence number of the draggable & onclick objects in your script.<br>Only draggable & onclick objects will have an object_number (e.g things like point,crosshair,line,segment,circle,rect,triangle...etc)
		1566	@ use keyword <a href='#snaptogrid'>snaptogrid</a>, <a href='#xsnaptogrid'>xsnaptogrid</a>, <a href='#ysnaptogrid'>ysnaptogrid</a> or command <a href='#snaptopoints'>snaptopoints x1,y1,x2,y2,...</a> to switch from free to discrete movement
		1567	@ in case of external images (commands copy / copyresized) the external image can be set draggable ; always xy. <br>The function javascript;read_canvas() will return the xy-coordinates of all images.
		1568	@%drag_x%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag x%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
		1569	@%drag_y%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag y%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
		1570	@%drag_xy%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag xy%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
18552	bpr	1571	*/
		1572	temp = get_string(infile,1);
		1573	if(strstr(temp,"xy") != NULL ){
		1574	drag_type = 0;
		1575	} else {
		1576	if(strstr(temp,"x") != NULL ){
		1577	drag_type = 1;
		1578	}
		1579	else { drag_type = 2;}
		1580	}
		1581	/* assuming all drag&drop coordinates the same precision: so set only once */
		1582	if( print_drag_params_only_once == FALSE ){
		1583	fprintf(js_include_file,"dragdrop_precision = %d;use_dragdrop_reply = true;",precision);
		1584	print_drag_params_only_once = TRUE;
		1585	}
		1586	onclick = 2;
		1587	/* if(use_userdraw == TRUE ){canvas_error("\"drag & drop\" may not be combined with \"userdraw\" or \"pan and zoom\" \n");} */
		1588	use_dragstuff = 2;
		1589	js_function[INTERACTIVE] = 1;
		1590	break;
		1591	case ELLIPSE:
		1592	/*
		1593	@ ellipse xc,yc,width_x,height_y,color
		1594	@ ellipses with center xc/yc and width/height in x/y-range etc (this differs from flydraw syntax!)
		1595	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1596	@ will shrink / expand on zoom out / zoom in
		1597	@%ellipse%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%opacity 200,40%linewidth 3%drag xy%ellipse 0,0,6,4,green%zoom blue
		1598	*/
		1599	for(i=0;i<5;i++){
		1600	switch(i){
		1601	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		1602	case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		1603	case 2:double_data[2] = get_real(infile,0);break; /* rx -> px */
		1604	case 3:double_data[3] = get_real(infile,0);break; /* ry -> px */
		1605	case 4:stroke_color = get_color(infile,1);/* name or hex color */
		1606	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,4);}
		1607	if(use_affine == TRUE ){ transform(2,4);}
		1608	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1609	decimals = find_number_of_digits(precision);
18557	bpr	1610	tmp_buffer=my_newmem(MAX_BUFFER);
		1611	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.f],[%.f],[%.f],[%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1612	add_to_buffer(tmp_buffer);
		1613	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		1614	dragstuff[3] = 1;
		1615	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1616	reset();
		1617	break;
		1618	}
		1619	}
		1620	break;
		1621	case ELLIPSES:
		1622	/*
		1623	@ ellipses color,xc1,yc1,width_x1,height_y1,xc2,yc2,width_x2,height_y2,xc3,yc3,width_x3,height_y3,...
		1624	@ ellipses with center and height in x/y-range etc (this differs from flydraw syntax!)
		1625	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1626	@ will shrink / expand on zoom out / zoom in
		1627	@%ellipses%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%opacity 200,40%linewidth 3%onclick%ellipses red,-3,0,2,4,0,0,4,2,3,0,6,2
		1628	*/
8224	bpr	1629
18552	bpr	1630	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		1631	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		1632	fill_color = stroke_color;
		1633	i=1;
		1634	while( ! done ){ /* get next item until EOL*/
		1635	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		1636	switch (i%4){
		1637	case 1:double_data[i-1] = get_real(infile,0);break; /* x */
		1638	case 2:double_data[i-1] = get_real(infile,0);break; /* y */
		1639	case 3:double_data[i-1] = get_real(infile,0);break; /* rx */
		1640	case 0:double_data[i-1] = get_real(infile,1);break; /* ry */
		1641	default: break;
		1642	}
		1643	i++;
		1644	}
		1645	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,4);}
		1646	if(use_affine == TRUE ){ transform(i-1,4);}
		1647	decimals = find_number_of_digits(precision);
		1648	for(c = 0 ; c < i-1 ; c = c+4){
18557	bpr	1649	check_string_length(string_length)
		1650	;tmp_buffer=my_newmem(MAX_BUFFER);
		1651	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.f],[%.f],[%.f],[%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+2],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	1652	add_to_buffer(tmp_buffer);
		1653	if(onclick != 0){object_cnt++;} /* object_cnt++; */
		1654	}
		1655	reset();
		1656	dragstuff[3] = 1;
		1657	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		1658	break;
		1659	case FILLALL:
		1660	/*
		1661	@ fillall color,x1,y1,x2,y2...x_n,y_n
		1662	@ fill all region containing points (x1:y1),(x2:y2)...(x_n:y_n) with color 'color'
		1663	@ any other colors (objects) in the <a href="#canvastype">canvastype</a> will act as border to the bucket fill
		1664	@ use this command after all boundary objects are declared.
		1665	@ Use command 'userdraw clickfill,color' for user click driven flood fill.
		1666	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
		1667	@ note: the fill-family of commands are very (client) cpu intensive operations!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
		1668	@%fillall%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%vlines black,-5,0,-5,0,-4,0,-4,0,3,0,3,0%hlines black,-5,0,-5,0,-5,4,-5,4,-5,-2,-5,-2%circles green,0,0,2,3,3,5,-5,-5,3%opacity 240,50%fillall blue,1,1,8,8,-8,-8
		1669	*/
		1670	decimals = find_number_of_digits(precision);
		1671	fill_color=get_color(infile,0); /* how nice: now the color comes first...*/
		1672	i=0;
		1673	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1674	js_function[DRAW_FILLTOBORDER] = 1;
		1675	add_js_filltoborder(canvas_type);
		1676	}
		1677	while( ! done ){ /* get next item until EOL*/
		1678	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		1679	if(i%2 == 0 ){
		1680	double_data[i] = get_real(infile,0); /* x */
		1681	}
		1682	else {
		1683	double_data[i] = get_real(infile,1); /* y */
18557	bpr	1684	tmp_buffer=my_newmem(MAX_BUFFER);
18609	bpr	1685	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "setTimeout(function(){filltoborder(%.f,%.f,false,[%s,%d],%d,false,null);},1000);\n",decimals,double_data[i-1],decimals,double_data[i],fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt));
18552	bpr	1686	add_to_buffer(tmp_buffer);
		1687	fill_cnt++;
		1688	}
		1689	i++;
		1690	}
		1691	break;
		1692	case FILLED:
		1693	/*
		1694	@ filled
		1695	@ keyword (no arguments required)
		1696	@ the next ''fillable`` object (only the next !) will be filled
		1697	@ use command <a href="#fillcolor">fillcolor color</a> to set fillcolor
		1698	@ use <a href="#fillpattern">fillpattern</a> for non-solid color filling.
		1699	@ use command <code>opacity 0-255,0-255</code> to set stroke and fill-opacity
		1700	@ use command <a href='#fill'>fill x,y,color</a> or <a href="#floodfill">floodfill x,y,color</a> to fill the space around (x;y) with color <br>pixel operation implemented in javascript: use with care !
		1701	*/
		1702	use_filled = 1;
		1703	break;
		1704	case FILLCOLOR:
		1705	/*
		1706	@ fillcolor colorname or #hex
		1707	@ set the color: mainly used for command 'userdraw obj,stroke_color'
		1708	@ all fillable massive objects will have a fillcolor == strokecolor (just to be compatible with flydraw...)
		1709	@ see <a href="#fillpattern">fillpattern</a> for non-solid color filling.
		1710	*/
		1711	fill_color = get_color(infile,1);
		1712	break;
		1713	case FILLPATTERN:
		1714	/*
		1715	@ fillpattern grid \| hatch \| diamond \| dot \| image_url
		1716	@ alternative: settile image_url
		1717	@ use a pattern as fillstyle
		1718	@ suitable for all fillable object including the <a href="#userdraw">userdraw objects' family</a>
		1719	@ note: do not use the ''f`` for a fillable object : this is used exclusively for solid colour filling.
18569	bpr	1720	@ the fillcolor is set by the object command, for example:<br><code>size 370,370<br>xrange -5,5<br>yrange -5,5<br>opacity 165,150<br>fillpattern grid<br>circle -6,3,160,blue<br>fillpattern dot<br>circle -3,-3,160,red<br>fillpattern hatch<br>circle 0,3,160,green<br>fillpattern diamond<br>circle 3,-3,160,cyan<br>userdraw dotfill,blue<br>zoom red</code>
18552	bpr	1721	@ the pattern dimensions are hardcoded (linewidth, radius,dx,dy are fixed)
		1722	@ the pattern color is set by command <a href='#fillcolor'>fillcolor</a> and <a href='#opacity'>opacity</a>
		1723	@ see <a href="#fillcolor">fillcolor</a> for solid color filling.
18569	bpr	1724	@ when using an image-url, make sure it contains an ''/`` in the filename...''fillpattern $module_dir/gifs/test.jpg`` will fill the next fillable object with this image.\|<br>the argument to html5 canvas routine 'createPattern(img,argument)' is set to ''repeat`` e.g. if the image is smaller then the canvas, multiple copies will be used to fill the area ( e.g. ctx.fillStyle() = pattern)<br>for example:<br><code>size 150,150<br>xrange -5,5<br>yrange -5,5<br>drag xy<br>fillpattern gifs/en.gif<br>circle 0,0,100,red<br>fillpattern gifs/nl.gif<br>drag xy<br>circle -3,2,100,green<br>fillpattern gifs/cn.gif<br>drag xy<br>circle 3,2,100,green</code>
18552	bpr	1725	@ fillpattern is also active for <a href="#userdraw">userdraw object,color</a>...<br>the userdraw family a has also ''clickfill type`` (e.g. an object gets filled between boundaries, when clicked) commands like:<br>'userdraw dotfill,color'<br>'userdraw hatchfill,color' etc
18569	bpr	1726	@%fillpattern_1%size 400,400%xrange -5,5%yrange -5,5%opacity 165,150%fillpattern grid%circle -6,3,160,blue%fillpattern dot%circle -3,-3,160,red%fillpattern hatch%circle 0,3,160,green%fillpattern diamond%circle 3,-3,160,cyan%zoom red
18552	bpr	1727	@%fillpattern_2%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%fillcolor green%fillpattern hatch%#fillpattern dot,diamond,grid,imageurl%userdraw circle,red
		1728	*/
		1729	temp = get_string(infile,1);
		1730	use_filled = 0;
		1731	js_function[DRAW_FILL_PATTERN] = 1;
		1732	if( strstr(temp,"grid") != 0 ){ use_filled = 2;}
		1733	else{
		1734	if( strstr(temp,"hatch") != 0 ){ use_filled = 3;}
		1735	else{
		1736	if( strstr(temp,"diamond") != 0 ){ use_filled = 4;}
		1737	else{
		1738	if( strstr(temp,"dot") != 0 ){ use_filled = 5;}
		1739	else{
		1740	if( strstr(temp,"/") != 0 ){ /* get_image_from_url() needs to be called after function definition...*/
		1741	use_filled = 6;js_function[JS_LOAD_IMAGE] = 1;
18557	bpr	1742	tmp_buffer=my_newmem(MAX_BUFFER);
		1743	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "get_image_from_url(\"%s\");",temp));
18552	bpr	1744	add_to_buffer(tmp_buffer);
		1745	}
		1746	}
		1747	}
		1748	}
		1749	}
		1750	if( use_filled == 0 ){canvas_error("fillpattern unknown or typo...choose grid,hatch,diamond of dot...");}
		1751	break;
		1752	case FILLTOBORDER:
		1753	/*
		1754	@ filltoborder x,y,bordercolor,color
		1755	@ fill the region of point (x:y) with color 'color'
		1756	@ any other color will not act as border to the bucket fill
		1757	@ use this command after all boundary objects are declared.
		1758	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
		1759	@ note: filltoborder is a very (client) cpu intensive operation!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
		1760	@ maybe used together with command <a href="#userdraw">userdraw clickfill,color</a>
		1761	@%filltoborder%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%filltoborder 6,6,blue,blue%filltoborder 6,-6,blue,red
		1762	*/
		1763	for(i=0 ;i < 4 ; i++){
		1764	switch(i){
		1765	case 0:double_data[0] = get_real(infile,0);break;
		1766	case 1:double_data[1] = get_real(infile,0);break;
		1767	case 2:bgcolor = get_color(infile,0);break;
		1768	case 3:fill_color = get_color(infile,1);
18569	bpr	1769	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1770	js_function[DRAW_FILLTOBORDER] = 1;
		1771	add_js_filltoborder(canvas_type);
		1772	}
		1773	decimals = find_number_of_digits(precision);
18552	bpr	1774	/* we need to set a timeout: the canvas is not yet draw in memory? when floodfill is called directly... */
18569	bpr	1775	tmp_buffer=my_newmem(MAX_BUFFER);
18609	bpr	1776	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "filltoborder(%.f,%.f,[%s,%d],[%s,%d],%d,false,null);\n",decimals,double_data[0],decimals,double_data[1],bgcolor,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt));
18569	bpr	1777	add_to_buffer(tmp_buffer);
		1778	fill_cnt++;
		1779	reset();
		1780	break;
18552	bpr	1781	default:break;
		1782	}
		1783	}
		1784	break;
		1785	case FLOODFILL:
		1786	/*
		1787	@ floodfill x,y,color
		1788	@ alternative: fill
		1789	@ fill the region of point (x:y) with color 'color'
		1790	@ any other color or size of picture (borders of picture) will act as border to the bucket fill
		1791	@ use this command after all boundary objects are declared.
		1792	@ Use command <code>userdraw clickfill,color</code> for user click driven flood fill.
		1793	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
		1794	@ note: floodfill is a very (client) cpu intensive operation!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
		1795	@%floodfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%floodfill 6,6,blue%floodfill 6,-6,red
		1796	*/
		1797	for(i=0 ;i < 4 ; i++){
		1798	switch(i){
		1799	case 0:double_data[0] = get_real(infile,0);break;
		1800	case 1:double_data[1] = get_real(infile,0);break;
		1801	case 2:fill_color = get_color(infile,1);
		1802	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1803	js_function[DRAW_FILLTOBORDER] = 1;
		1804	add_js_filltoborder(canvas_type);
		1805	}
		1806	decimals = find_number_of_digits(precision);
		1807	/* we need to set a timeout: the canvas is not yet draw in memory? when floodfill is called directly... */
18557	bpr	1808	tmp_buffer=my_newmem(MAX_BUFFER);
18609	bpr	1809	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "setTimeout(function(){filltoborder(%.f,%.f,false,[%s,%d],%d,false,null);},1000);\n",decimals,double_data[0],decimals,double_data[1],fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt));
18552	bpr	1810	add_to_buffer(tmp_buffer);
		1811	fill_cnt++;
		1812	break;
		1813	default:break;
		1814	}
		1815	}
		1816	reset();
		1817	break;
		1818	case FONTCOLOR:
		1819	/*
18556	bpr	1820	@ fontcolor color
		1821	@ color: hexcolor or colorname
		1822	@ default: black
		1823	@ use command <a href="#fontfamily">fontfamily</a> to deviate from default font type
		1824	@%fontcolor%size 400,400%xrange -10,10%yrange -10,10%fontcolor red%#note: use command fontfamily to change size and shape%axis%axisnumbering%grid 2,2,grey,2,2,4,grey
18552	bpr	1825	*/
		1826	font_color = get_color(infile,1);
		1827	break;
		1828	case FONTFAMILY:
		1829	/*
18556	bpr	1830	@ fontfamily font_description
		1831	@ set the font family; for browsers that support it
		1832	@ font_description: Arial, Courier, Helvetica etc
		1833	@ in case commands <code>string color,x,y,the string</code>, <code>stringup color,x,y,rotation,the string</code>, ''fontfamily`` can be something like:<code>fontfamily italic 34pt Arial</code>. Use correct syntax: ''font style``, ''font size pt``, ''fontfamily``
		1834	@%fontfamily%size 400,400%xrange -10,10%yrange -10,10 %fontfamily Bold 10pt Arial%string blue,-9,9,10 pt Arial%fontfamily Italic 20pt Arial%string blue,0,9,20 pt Arial%fontfamily Bold 10pt Helvetica%string blue,-9,5,10 pt Helvetica%fontfamily Italic 20pt Helvetica%string blue,0,5,20 pt Helvetica %fontfamily Bold 10pt Courier%string blue,-9,0,10 pt Courier%fontfamily Italic 20pt Courier%string blue,0,0,20 pt Courier%fontfamily Bold 10pt Fixed%string blue,-9,-5,10 pt Fixed%fontfamily Italic 20pt Fixed%string blue,0,-5,20 pt Fixed %fontfamily Bold 10pt Times%string blue,-9,-9,10 pt Times%fontfamily Italic 20pt Times%string blue,0,-9,20 pt Times
12110	schaersvoo	1835
18552	bpr	1836	*/
		1837	font_family = get_string(infile,1);
		1838	break;
		1839	case FONTSIZE:
		1840	/*
18556	bpr	1841	@ fontsize font_size
		1842	@ default value 12
		1843	@ note: for some macros (like ''grid \| legend \| xaxistext \| xlabel`` etc) sometimes command <a href="#fontfamily">fontfamily</a> can be used for some specific font-setting<br>this is however not always very straight forward... so just try and see what happens
18552	bpr	1844	*/
		1845	font_size = (int) (get_real(infile,1));
		1846	break;
		1847	case FUNCTION_LABEL:
		1848	/*
18556	bpr	1849	@ functionlabel label_1:label_2:label_3...
		1850	@ alternative: functionlabels
		1851	@ default value ''f(x)=:g(x)=:h(x)=:i(x)=:j(x)=:k(x)=:m(x)=:n(x)=``
		1852	@ no mathml allowed (just ascii string)
		1853	@ use command <a href='#fontsize'>fontsize int</a> to adjust the size
		1854	@ use command <a href='#strokecolor'>strokecolor colorname</a> to adjust the labels (individually, if needed)
		1855	@ if needed, use before every command <a href='#userinput'>userinput function \| inputfield \| textarea</a>
		1856	@ no limit in amount of inputfields for userbased function plotting
		1857	@%function_label%size 400,400%xrange -5,5%yrange -5,5%precision 0%axis%axisnumbering%opacity 100,190%grid 1,1,grey,2,2,5,black%linewidth 3%linewidth 1%precision 1000%functionlabels F(x)=:H(x)=:Yield(x)=%strokecolor green%userinput function%strokecolor red%userinput function%strokecolor blue%userinput function
18552	bpr	1858	*/
		1859	temp = get_string_argument(infile,1);
		1860	function_label = list2js_array(temp,":");
		1861	break;
		1862	case GRID:/* xmajor,ymajor,gridcolor [,xminor,yminor,tick length (px), axis/tickscolor]*/
		1863	/*
18556	bpr	1864	@ grid step_x,step_y,gridcolor
		1865	@ if keywords <a href="#axis">axis</a> or <a href="#axisnumbering">axisnumbering</a> are set, use: <code>grid step_x,step_y,major_color,minor_x,minor_y,tics height in px,axis_color</code> minor x step = step_x / minor_x
		1866	@ in that case, use command <a href="#fontcolor">fontcolor</a>, <a href="#fontsize">fontsize</a> and / or <a href="#fontfamily">fontfamily</a> to adjust font; defaults: black,12,Arial
		1867	@ if xmin > 0 and/or ymin > 0 and zooming / panning is not active: be aware that the x/y-axis numbering and x/y major/minor tic marks will not be visual as they are placed under the x-axis and left to the y-axis (in Quadrant II and IV)
		1868	@ can <b>not</b> be set <a href="#onclick">onclick</a> or <a href="#drag">drag xy</a>
		1869	@ use commands <a href="#xlabel">xlabel some_string</a> and/or <a href="#ylabel">ylabel some_string</a> to label axis; use command ''fontsize`` to adjust size: the font family is non-configurable 'italic your_fontsize px Arial' !
		1870	@ see commands <a href="#xaxis">xaxis or xaxistext</a>, <a href="#yaxis">yaxis or yaxistext</a> to set tailormade values on axis (the used font is set by command <a href="#fontfamily">fontfamily</a>; default '12px Arial')
		1871	@ see command <a href="#legend">legend</a> to set a legend for the graph; use command <a href="#fontsize">fontsize</a> to adjust size (the font family is non-configurable 'bold your_fontsize px Arial')
		1872	@%grid%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%zoom red
		1873	@%grid_axis%size 400,400%xrange -10,10%yrange -10,10%axis%grid 1,1,grey,2,2,6,black%zoom red
		1874	@%grid_axis_axisnumbering%size 400,400%xrange -10,10%yrange -10,10%fontfamily Italic 14px Courier%axis%axisnumbering%precision 0%grid 1,1,grey,2,2,6,black%zoom red
18552	bpr	1875	*/
		1876	if( js_function[DRAW_YLOGSCALE] == 1 ){canvas_error("only one grid type is allowed...");}
		1877	js_function[DRAW_GRID] = 1;
		1878	for(i=0;i<4;i++){
		1879	switch(i){
		1880	case 0:double_data[0] = get_real(infile,0);break;/* xmajor */
		1881	case 1:double_data[1] = get_real(infile,0);break;/* ymajor */
		1882	case 2:
		1883	if( use_axis == TRUE ){
		1884	stroke_color = get_color(infile,0);
		1885	done = FALSE;
		1886	int_data[0] = (int) (get_real(infile,0));/* xminor */
		1887	int_data[1] = (int) (get_real(infile,0));/* yminor */
		1888	int_data[2] = (int) (get_real(infile,0));/* tic_length */
		1889	fill_color = get_color(infile,1); /* used as axis_color*/
		1890	}
		1891	else {
		1892	int_data[0] = 1;
		1893	int_data[1] = 1;
		1894	stroke_color = get_color(infile,1);
		1895	fill_color = stroke_color;
		1896	}
		1897	if( double_data[0] <= 0 \|\| double_data[1] <= 0 \|\| int_data[0] <= 0 \|\| int_data[1] <= 0 ){canvas_error("major or minor ticks must be positive !");}
		1898	/* set snap_x snap_y values in pixels */
		1899	fprintf(js_include_file,"snap_x = %f;snap_y = %f;",double_data[0] / int_data[0],double_data[1] / int_data[1]);
		1900	fprintf(js_include_file,"\n/* add grid /function redraw_grid(){draw_grid%d(%d,%d,%.2f,%.f,%.*f,%d,%d,%d,%d,\"%s\",\"%s\",%d,\"%s\",%d,%d,%d,%d,%d,\"%s\",%.2f);return;};",canvas_root_id,GRID_CANVAS,precision,stroke_opacity,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],int_data[2],line_width,stroke_color,fill_color,font_size,font_family,use_axis,use_axis_numbering,use_dashed,dashtype[0],dashtype[1],font_color,fill_opacity);
18557	bpr	1901	tmp_buffer=my_newmem(MAX_BUFFER);
		1902	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "redraw_grid();\n"));
18552	bpr	1903	add_to_buffer(tmp_buffer);
		1904	break;
		1905	}
		1906	}
		1907	reset();
		1908	break;
		1909	case GRIDFILL:
		1910	/*
		1911	@ gridfill x0,y0,dx,dy,color
		1912	@ x0,y0 in xrange / yrange
		1913	@ distances dx,dy in pixels
		1914	@ there is also a command <a href="#userdraw">userdraw gridfill,color</a>
		1915	@%gridfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%gridfill 6,6,10,10,blue%gridfill 6,-6,6,6,red
11806	schaersvoo	1916
18552	bpr	1917	*/
		1918	js_function[DRAW_GRIDFILL] = 1;
		1919	decimals = find_number_of_digits(precision);
		1920	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		1921	js_function[DRAW_FILLTOBORDER] = 1;
		1922	add_js_filltoborder(canvas_type);
		1923	}
		1924	for(i=0;i<5;i++){
		1925	switch(i){
		1926	case 0: double_data[0] = get_real(infile,0); break; /* x */
		1927	case 1: double_data[1] = get_real(infile,0); break; /* y */
		1928	case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		1929	case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		1930	case 4: stroke_color = get_color(infile,1);
18557	bpr	1931
		1932	tmp_buffer=my_newmem(MAX_BUFFER);
		1933	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_gridfill(%d,%.f,%.f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize));
18552	bpr	1934	add_to_buffer(tmp_buffer);
		1935	fill_cnt++;
		1936	reset();
		1937	break;
		1938	default:break;
		1939	}
		1940	}
		1941	break;
		1942	case GROUP:
		1943	/*
18556	bpr	1944	@ group
		1945	@ keyword
		1946	@ work in 'progress'
		1947	@ all objects() after the command and until <a href="#kill">kill group</a> or <a href="#killslider">killslider</a> may be moved together with mouse moverments<br> () for now all real canvas objects and latex / xml ; but no images (work in progress)
		1948	@ may be combined with slider driven movements or drag & drop
		1949	@%group%%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%rotationcenter 0,0%slider -2pi,2pi,300,40,angle active,rotate%snaptogrid%ftriangle 0,-4,-2,-2,4,--5,blue%fillcolor red%fcircle -4.4,4.4,40,blue%kill slider%slider -20,20,300,40,x active,x-slide%ftriangle -2,0,0,4,2,0,green%fcircle 4.4,4.5,40,red%kill slider%slider -20,20,300,40,y active,y-slide%fcircle 4,-4,40,green%linewidth 4%fcircle -4,-4,40,orange%kill slider%group%fcircle -4.4,4.5,10,blue%fcircle -5.4,4.5,10,blue%fcircle -6.4,4.5,10,blue%fcircle -4.4,8,16,green%fcircle -5.4,8,16,green%fcircle -6.4,8,16,green%mouse red,22%zoom red
18552	bpr	1950	*/
		1951	use_slider++;
		1952	add_slider(2);
		1953	no_reset = TRUE;
		1954	int c = 0;
		1955	for(i=last_slider;i<=use_slider;i++){ int_data[c] = i; c++; }
		1956	my_sliders = data2js_array(int_data,use_slider - last_slider+1);
		1957	if( precision == 0 ){precision = 100;}
		1958	onclick = 5;
		1959	use_dragstuff = 2;
		1960	drag_type = 0;
		1961	js_function[INTERACTIVE] = 1;
		1962	fprintf(js_include_file,"var slider%d;dragdrop_precision = %d;use_dragdrop_reply = true;",use_slider,precision);
18557	bpr	1963	tmp_buffer=my_newmem(MAX_BUFFER);
		1964	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "slider%d = new move_group(%d);\n",use_slider,use_slider));
18552	bpr	1965	add_to_buffer(tmp_buffer);
		1966	break;
		1967	case HALFLINE:
		1968	/*
		1969	@ demiline x1,y1,x2,y2,color
		1970	@ alternative: halfline
		1971	@ draws a halfline starting in (x1:y1) and through (x2:y2) in color 'color' (colorname or hex)
		1972	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		1973	@%halfline%size 400,400%xrange -10,10%yrange -10,10%halfline -5,5,0,0,red%halfline -5,-5,0,0,blue
		1974	*/
		1975	for(i=0; i<13;i++){double_data[i]=0;}
		1976	for(i=0;i<5;i++){
		1977	switch(i){
		1978	case 0: double_data[0]= get_real(infile,0);break; /* x-values */
		1979	case 1: double_data[1]= get_real(infile,0);break; /* y-values */
		1980	case 2: double_data[10]= get_real(infile,0);break; /* x-values */
		1981	case 3: double_data[11]= get_real(infile,0);break; /* y-values */
		1982	case 4: stroke_color=get_color(infile,1);/* name or hex color */
		1983	if(double_data[0] == double_data[10]){ /* vertical halfline */
		1984	if(double_data[1] < double_data[11]){
		1985	double_data[3] = ymax + 1000;
		1986	}
		1987	else {
		1988	double_data[3] = ymin - 1000;
		1989	}
		1990	double_data[2] = double_data[0];
		1991	} else { /* horizontal halfline*/
		1992	if( double_data[1] == double_data[11] ){
		1993	if( double_data[0] < double_data[10] ){
		1994	double_data[2] = xmax + 1000; /* halfline to the right */
		1995	}
		1996	else {
		1997	double_data[2] = xmin - 1000; /* halfline to the left */
		1998	}
		1999	double_data[3] = double_data[1];
		2000	}
		2001	else {
		2002	/* any other halfline */
		2003	/* slope */
		2004	double_data[12] = (double_data[11] - double_data[1])/(double_data[10] - double_data[0]);
		2005	/* const */
		2006	double_data[13] = double_data[1] - double_data[12]*double_data[0];
		2007	if( double_data[0] < double_data[10] ){
		2008	double_data[2] = double_data[2] + 1000;
		2009	}
		2010	else {
		2011	double_data[2] = double_data[2] - 1000;
		2012	}
		2013	double_data[3] = double_data[12]*double_data[2] + double_data[13];
		2014	}
		2015	}
		2016	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2017	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		2018	if(use_affine == TRUE ){ transform(4,2);}
18557	bpr	2019	tmp_buffer=my_newmem(MAX_BUFFER);
		2020	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2021	add_to_buffer(tmp_buffer);
		2022	if(onclick != 0){object_cnt++;}
		2023	/* object_cnt++; */
		2024	reset();
		2025	break;
		2026	}
		2027	}
		2028	dragstuff[18] = 1;
		2029	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2030	break;
		2031	case HALFLINES:
		2032	/*
		2033	@ demilines color,x1,y1,x2,y2,....
		2034	@ alternative: halflines
		2035	@ draws halflines starting in (x1:y1) and through (x2:y2) in color 'color' (colorname or hex) etc
		2036	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> indiviually
		2037	@%halflines%size 400,400%xrange -10,10%yrange -10,10%halflines red,-5,5,0,0,-5,-5,0,0
		2038	*/
		2039	stroke_color=get_color(infile,0);
		2040	fill_color = stroke_color;
		2041	i=0;
		2042	while( ! done ){ /* get next item until EOL*/
		2043	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		2044	if(i%2 == 0 ){
		2045	double_data[i] = get_real(infile,0); /* x */
		2046	} else {
		2047	double_data[i] = get_real(infile,1); /* y */
		2048	}
		2049	i++;
		2050	}
		2051	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2052	decimals = find_number_of_digits(precision);
		2053	for(c = 0 ; c < i-1 ; c = c+4){
		2054	if( double_data[c] == double_data[c+2] ){ /* vertical line*/
		2055	if(double_data[c+1] < double_data[c+3]){ /* upright halfline */
		2056	double_data[c+3] = ymax + 1000;
		2057	}
		2058	else {
		2059	double_data[c+3] = ymin - 1000;/* descending halfline */
		2060	}
		2061	}
		2062	else {
		2063	if( double_data[c+1] == double_data[c+3] ){ /* horizontal line */
		2064	if(double_data[c] < double_data[c+2] ){ /* halfline to the right */
		2065	double_data[c+2] = xmax+100;
		2066	}
		2067	else {
		2068	double_data[c+2] = xmin-1000; /* halfline to the right */
		2069	}
		2070	}
		2071	else {
		2072	/* m */
		2073	double m = (double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]);
		2074	/* q */
		2075	double q = double_data[c+1] - ((double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]))*double_data[c];
		2076	if(double_data[c] < double_data[c+2]){ /* to the right */
		2077	double_data[c+2] = xmax+1000; /* 1000 is needed for dragging...otherwise it is just segment */
		2078	double_data[c+3] = (m)*(double_data[c+2])+(q);
		2079	}
		2080	else { /* to the left */
		2081	double_data[c+2] = xmin - 1000;
		2082	double_data[c+3] = (m)*(double_data[c+2])+(q);
		2083	}
		2084	}
		2085	}
		2086	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		2087	if(use_affine == TRUE ){ transform(i-1,2);}
18557	bpr	2088	tmp_buffer=my_newmem(MAX_BUFFER);
		2089	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2090	add_to_buffer(tmp_buffer);
		2091	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		2092	}
		2093	reset();
		2094	dragstuff[18] = 1;
		2095	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2096	break;
		2097	case HATCHFILL:
		2098	/*
		2099	@ hatchfill x0,y0,dx,dy,color
		2100	@ x0,y0 in xrange / yrange
		2101	@ distances dx,dy in pixels
		2102	@ there is also a command <a href="#userdraw">userdraw hatchfill,color</a>
		2103	@%hatchfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%hatchfill 6,6,10,10,blue%hatchfill 6,-6,6,6,red
		2104	*/
		2105	js_function[DRAW_HATCHFILL] = 1;
		2106	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		2107	js_function[DRAW_FILLTOBORDER] = 1;
		2108	add_js_filltoborder(canvas_type);
		2109	}
		2110	decimals = find_number_of_digits(precision);
		2111	for(i=0;i<5;i++){
		2112	switch(i){
		2113	case 0: double_data[0] = get_real(infile,0); break; /* x */
		2114	case 1: double_data[1] = get_real(infile,0); break; /* y */
		2115	case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		2116	case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		2117	case 4: stroke_color = get_color(infile,1);
		2118	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		2119	if(use_affine == TRUE ){ transform(2,2);}
		2120	/* draw_hatchfill(ctx,x0,y0,dx,dy,linewidth,color,opacity,xsize,ysize) */
18557	bpr	2121	tmp_buffer=my_newmem(MAX_BUFFER);
		2122	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_hatchfill(%d,%.f,%.f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize));
18552	bpr	2123	add_to_buffer(tmp_buffer);
		2124	fill_cnt++;
		2125	reset();
		2126	break;
		2127	default:break;
		2128	}
		2129	}
		2130	break;
		2131	case HLINE:
		2132	/*
		2133	@ hline x,y,color
		2134	@ alternative: horizontalline
		2135	@ draw a horizontal line through point (x:y) in color 'color'
		2136	@ or use command <a href='#curve'>curve color,formula</a> to draw the line (uses more points to draw the line; is however better draggable)
		2137	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		2138	@%hline%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%hline 0,0,red%dhline 0,5,blue
		2139	*/
		2140	for(i=0;i<3;i++) {
		2141	switch(i){
		2142	case 0: double_data[0] = get_real(infile,0);break; /* x-values */
		2143	case 1: double_data[1] = get_real(infile,0);break; /* y-values */
		2144	case 2: stroke_color = get_color(infile,1);/* name or hex color */
		2145	double_data[3] = double_data[1];
		2146	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		2147	if(use_affine == TRUE ){ transform(2,2);}
		2148	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2149	decimals = find_number_of_digits(precision);
18557	bpr	2150	tmp_buffer=my_newmem(MAX_BUFFER);
		2151	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,100xmin,decimals,100xmax,decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2152	add_to_buffer(tmp_buffer);
		2153	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		2154	dragstuff[4] = 1;
		2155	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2156	reset();
		2157	break;
		2158	}
		2159	}
		2160	break;
		2161	case HLINES:
		2162	/*
		2163	@ hlines color,x1,y1,x2,y2,...
		2164	@ alternative: horizontallines
		2165	@ draw horizontal lines through points (x1:y1)...(xn:yn) in color 'color'
		2166	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		2167	@%hlines%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%hlines red,0,0,0,5,0,-5
		2168	*/
		2169	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		2170	fill_color = stroke_color;
		2171	i=0;
		2172	while( ! done ){ /* get next item until EOL*/
		2173	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		2174	if(i%2 == 0 ){
		2175	double_data[i] = get_real(infile,0); /* x */
		2176	}
		2177	else {
		2178	double_data[i] = get_real(infile,1); /* y */
		2179	}
		2180	i++;
		2181	}
		2182	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		2183	if(use_affine == TRUE ){ transform(i-1,2);}
		2184	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
11806	schaersvoo	2185
18552	bpr	2186	decimals = find_number_of_digits(precision);
		2187	for(c = 0 ; c < i-1 ; c = c+2){
18557	bpr	2188	tmp_buffer=my_newmem(MAX_BUFFER);
18607	bpr	2189	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,100xmin,decimals,100xmax,decimals,double_data[c+1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2190	add_to_buffer(tmp_buffer);
		2191	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		2192	}
		2193	reset();
		2194	dragstuff[4] = 1;
		2195	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2196	break;
		2197	case HTTP:
		2198	/*
18556	bpr	2199	@ http x1,y1,x2,y2,http://some_adress.com
		2200	@ an active html-page will be displayed in an "iframe" rectangle left top (x1:y1), right bottom (x2:y2)
		2201	@ do not use interactivity (or mouse) if the mouse needs to be active in the iframe
		2202	@ can <b>not</b> be ''set onclick`` or ''drag xy``
		2203	@%http%size 400,400%xrange -10,10%yrange -10,10%http 0,10,10,0,http://wims.unice.fr%opacity 200,50%drag xy%fcircle 0,0,100,green
18552	bpr	2204	*/
		2205	js_function[DRAW_HTTP] = 1;
		2206	for(i=0;i<5;i++){
		2207	switch(i){
		2208	case 0: int_data[0]=x2px(get_real(infile,0));break; /* x in x/y-range coord system -> pixel width */
		2209	case 1: int_data[1]=y2px(get_real(infile,0));break; /* y in x/y-range coord system -> pixel height */
		2210	case 2: int_data[2]=x2px(get_real(infile,0)) - int_data[0];break; /* width in x/y-range coord system -> pixel width */
		2211	case 3: int_data[3]=y2px(get_real(infile,0)) - int_data[1];break; /* height in x/y-range coord system -> pixel height */
		2212	case 4: decimals = find_number_of_digits(precision);
		2213	temp = get_string(infile,1);
		2214	if(strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'");}
18557	bpr	2215	tmp_buffer = my_newmem(string_length+2);
		2216	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_http(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp));
18552	bpr	2217	add_to_buffer(tmp_buffer);
		2218	break;
		2219	}
		2220	}
		2221	reset();
		2222	break;
		2223	case HTML:
		2224	/*
18556	bpr	2225	@ html x1,y1,html_string
		2226	@ all tags are allowed, html code using inputfields could be read using your own javascript code. Do not use ids like 'canvas_input0' etc.
		2227	@ can be set <a href='#onclick'>onclick</a> and <a href='#drag'>drag&drop</a>
		2228	@ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
		2229	@ command <a href='#rotate'>rotate</a> will rotate the object
		2230	@ use keyword <a href='#centered'>centered</a> to center the html object on (x1:y1)
		2231	@ note: using drag&drop for all external P,SPAN,DIV,IMG,SVG-images onto a canvasdraw element, use ''onclick=javascript:place_image_on_canvas(this.id)``
		2232	@ note: sub & sup are supported in command family <a href='#string'>string</a>, e.g. real internal canvas objects !
		2233	@%html-text%size 500,500%xrange -10,10%yrange -10,10%drag xy%centered%fillcolor lightblue%html 2,2,<h1 style='color:red'>DRAG ME</h1> %opacity 200,50%drag xy%fcircle 0,0,100,green
		2234	@%html-image-slider%size 500,500%xrange -10,10%yrange -10,10%fontsize 42%rotationcenter 0,0%centered%html 0,0,<img src="http://85.148.206.56/gifs/can1.gif">%slider 0,pi,400,40,angle active degree, %centered%html 0,0,<img src="http://85.148.206.56/gifs/can2.gif">
18552	bpr	2235	*/
		2236	js_function[DRAW_XML] = 1;
		2237	for(i=0;i<5;i++){
		2238	switch(i){
		2239	case 0: double_data[0] = get_real(infile,0);break;
		2240	case 1: double_data[1] = get_real(infile,0);break;
		2241	case 4: decimals = find_number_of_digits(precision);
		2242	if(use_affine == TRUE ){ transform(2,2);}/* needs double_data[] */
		2243	if( use_offset != 0 \|\| drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		2244	int_data[0] = x2px(double_data[0]);/* needs px */
		2245	int_data[1] = y2px(double_data[1]);
		2246	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2247	if( use_slider != -1 && drag_type != -1){ onclick = 5; }
		2248	temp = get_string(infile,1);
		2249	if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","\\\""); }
		2250	if( strstr(temp,"<img ")!= 0){URL="image";}else{URL="html";}
18557	bpr	2251	tmp_buffer=my_newmem(MAX_BUFFER);
		2252	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var draw_xml%d = {id:%d,type:'%s',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,URL,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt));
18552	bpr	2253	add_to_buffer(tmp_buffer);
		2254	if(onclick != 0 ){object_cnt++;}
		2255	drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		2256	break;
		2257	default:break;
		2258	}
		2259	}
		2260	reset();
		2261	break;
		2262	case IMAGEFILL:
		2263	/*
		2264	@ imagefill x,y,scaling to xsize × ysize?,image_url
		2265	@ The next suitable <b>filled object</b> will be filled with "image_url" tiled
		2266	@ scaling to xsize × ysize ? ... 1 = yes 0 = no
		2267	@ After pattern filling, the fill-color should be reset !
		2268	@ wims getins / image from class directory: imagefill 80,80,my_image.gif
		2269	@ normal url: imagefill 80,80,0,$module_dir/gifs/my_image.gif
		2270	@ normal url: imagefill 80,80,1,http://adres/a/b/c/my_image.jpg
		2271	@ if dx,dy is larger than the image, the whole image will be background to the next object.
		2272	@%imagefill_tile%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,5,3,2,5%imagefill 1.5,1.5,0,gifs/en.gif%imagefill -5,5,0,gifs/logo/wimsedu.png
		2273	@%imagefill_scale%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,5,3,2,5%imagefill 1.5,1.5,1,gifs/en.gif%imagefill -5,5,1,gifs/logo/wimsedu.png
		2274	*/
		2275	js_function[DRAW_IMAGEFILL] = 1;
		2276	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		2277	js_function[DRAW_FILLTOBORDER] = 1;
		2278	add_js_filltoborder(canvas_type);
		2279	}
		2280	for(i=0 ;i < 4 ; i++){
		2281	switch(i){
		2282	case 0:int_data[0] = (int) (get_real(infile,0));break;
		2283	case 1:int_data[1] = (int) (get_real(infile,0));break;
		2284	case 2:int_data[2] = (int) (get_real(infile,0));break; /* 0 \| 1 */
		2285	case 3: URL = get_string_argument(infile,1);
18557	bpr	2286	tmp_buffer=my_newmem(MAX_BUFFER);
		2287	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_imagefill(%d,%d,%d,\"%s\",%d,%d,%d,%d);\n",STATIC_CANVAS+fill_cnt,int_data[0],int_data[1],URL,xsize,ysize,use_userdraw,int_data[2]));
18552	bpr	2288	add_to_buffer(tmp_buffer);
		2289	fill_cnt++;
		2290	break;
		2291	}
		2292	}
		2293	reset();
		2294	break;
		2295	case IMAGEPALETTE:
		2296	/*
18556	bpr	2297	@ imagepalette image1,image2,image3,...
		2298	@ if used before and together with command <a href='#multidraw'>multidraw images,..,..., etc</a> the image will be presented in a small table in the ''control panel``.
		2299	@%imagepalette%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%copy 0,0,-1,-1,-1,-1,gifs/images/skull_and_crossbones50.png%fontcolor green%fontfamily Bold 42pt Arial%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multiuserinput 0,0,1%css color:blue;%multisnaptogrid 1,1,1%multilinewidth 0,4,0%# attention: use unicode text input without the slash %# \u222D ---> u222D at least will sometimes work%# otherwise cut&past unicode symbols into inputfield...%multilabel TEXT,REACTION ARROW,FLAGS,STOP DRAWING%multidraw text,arrow,images
18552	bpr	2300	*/
		2301	temp = get_string(infile,1);
		2302	temp = str_replace(temp,",","\",\"");
		2303	if( use_tooltip == 1 ){canvas_error("command 'imagepalette' is incompatible with command 'intooltip tip_text',as they use the same div-element ");}
		2304	fprintf(js_include_file,"\nvar current_id;var imagepalette = [\" %s \"];\n",temp);
		2305	break;
		2306	case INPUT:
		2307	/*
18556	bpr	2308	@ input x,y,size,editable,value
		2309	@ to set inputfield "readonly", use editable = 0
		2310	@ if no preset 'value' is needed...use a 'space' as last item argument
		2311	@ only active inputfields (editable = 1) will be read with read_canvas();
		2312	@ if ''$status=done`` (e.g. in answer.phtml) the inputfield will be cleared and set readonly<br>override this by keyword <a href="#status">status</a>
		2313	@ may be further controlled by <a href="#css">css</a>
		2314	@ if mathml inputfields are present and / or some userdraw is performed, these data will <b>not</b> be send as well (javascript:read_canvas();)
		2315	@ use keyword <a href='#xoffset'>xoffset \| centered</a> if the inputfield should be centered on (x:y)<br> default is the left top corner is (x:y)
		2316	@ if the student must place an inputfield(s) somewhere on the canvas, use command <a href="#userdraw">userdraw input,color</a> or make use of a command like <a href="#userdraw">userdraw text,color</a>
		2317	@%input%size 400,400%xrange -10,10%yrange -10,10%linewidth 6%point 1,2,red%input 1,2,5,1, ?%point -5,5,red%input -5,5,5,1, ?%point 6,-5,red%input 6,-5,5,1, ?%point -5,-8,red%input -5,-8,5,1, ?
18552	bpr	2318	*/
		2319	js_function[DRAW_INPUTS] = 1;
		2320	for(i = 0 ; i<5;i++){
		2321	switch(i){
		2322	case 0: int_data[0]=x2px(get_real(infile,0));break;/* x in px */
		2323	case 1: int_data[1]=y2px(get_real(infile,0));break;/* y in px */
		2324	case 2: int_data[2]=abs( (int)(get_real(infile,0)));break; /* size */
		2325	case 3: if( get_real(infile,1) >0){int_data[3] = 1;}else{int_data[3] = 0;};break; /* readonly */
		2326	case 4: temp = get_string(infile,3);
18557	bpr	2327	tmp_buffer=my_newmem(MAX_BUFFER);
		2328	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_static_inputs(%d,%d,%d,%d,%d,%d,\"%s\",\"%s\",%d);\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],css_class,temp,use_offset));
18552	bpr	2329	add_to_buffer(tmp_buffer);
		2330	input_cnt++;break;
		2331	default: break;
		2332	}
		2333	}
		2334	if(reply_format == 0 ){reply_format = 15;}
		2335	reset();
		2336	break;
		2337	case INTOOLTIP:
18556	bpr	2338	/*
		2339	@ intooltip link_text
		2340	@ link_text is a single line (span-element)
		2341	@ link_text may also be an image URL ''http://some_server/images/my_image.png`` or ''$module_dir/gifs/my_image.jpg``
		2342	@ link_text may contain HTML markup
		2343	@ the canvas will be displayed in a tooltip on ''link_text``
		2344	@ the canvas is default transparent: use command <a href="#bgcolor">bgcolor color</a> to adjust background-color, the link text will also be shown with this 'bgcolor'.
		2345	@ many ''userinput stuff`` will use the tooltip_placeholder_div element...only one is defined in the wims-page<br>and are therefore these commands are mutually exclusive.<br>keep this in mind...
		2346	@%intooltip%size 400,400%xrange -10,10%yrange -10,10%fontfamily Bold 42pt Courier%string black,0,0,Hello World%intooltip <span style="background-color:black;color:white;font-style:bold;font-size:48pt;">CLICK <br>HERE</span>
		2347	*/
18552	bpr	2348	if(use_input_xy != FALSE ){canvas_error("intooltip can not be combined with userinput_xy or other commands using the tooltip-div...see documentation");}
		2349	if( use_tooltip == 1 ){ canvas_error("command 'intooltip' cannot be combined with command 'popup'...");}
		2350	tooltip_text = get_string(infile,1);
		2351	if(strstr(tooltip_text,"\"") != 0 ){ tooltip_text = str_replace(tooltip_text,"\"","'"); }
		2352	use_tooltip = 1;
		2353	break;
		2354	case JSCURVE:
		2355	/*
18556	bpr	2356	@ jscurve color,formula1(x),formula2(x),formula3(x),...
		2357	@ alternative: jsplot
		2358	@ your function will be plotted by the javascript engine of the client browser
		2359	@ if <a href='trange'>trange</a> is defined, the two functions will be plotted parametric<br><b>note</b>: use <i>x</i> as variable...and not <i>t</i>. Use keyword <a href='#animate'>animate</a> to animate a point on the curve
		2360	@ use only basic math in your curve: <code>sqrt,^,asin,acos,atan,log,pi,abs,sin,cos,tan,e</code>
		2361	@ use parenthesis and rawmath: use 2*x instead of 2x ; use 2^(sin(x))...etc etc (use error console to debug any errors...)
		2362	@ <b>attention</b>: last ''precision`` command in the canvasdraw script determines the calculation precision of the javascript curve plot !
		2363	@ no validity check is done by wims.
		2364	@ zooming & panning are implemented:<br>use command ''zoom color`` for mouse driven zooming<br>or use keyword 'setlimits' for inputfields setting xmin/xmax, ymin/ymax
		2365	@ zooming & panning is better than for curves produced by command <a href="#curve">curve color,formula</a> because for avery change in x/y-range the curve is recalculated in javascript
		2366	@ zooming & panning in case of userbased functionplot: reclick the OK button to re-plot curve onto the resized grid
		2367	@ use keyword <a href='animate'>animate</a> for animating a point on the curve
		2368	@ use command ''trace_jscurve formula(x)`` for tracing
		2369	@ use command ''jsmath formula(x)`` for calculating and displaying indiviual points on the curve
		2370	@ can <b>not</b> be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> (yet)
		2371	@ commands plotjump / plotstep are not active for ''jscurve``
		2372	@ every command jscurve will produce a new canvas (canvastype 111,112,113...) for this one curve.
18572	bpr	2373	@ plotting multiple js-curves on the same canvas (for example if you want to use 'userdraw clickfill,color' on <a href="#canvastype">canvastype</a> number 111, use:<br> <code>jscurve red,fun1(x),fun2(x)...fun_n(x)</code>, you must specify individual multistrokecolors & multistrokeopacity & multilinewidth for these multiple js-curves to use different colors. Otherwise all curves will be the same color... Use commands like: <a href="#multistrokecolors">multistrokecolors</a>, <a href="#multilinewidth">multilinewidth</a>, <a href="#multidash">multidash</a>, <a href="#multistrokeopacity">multistroke</a>, <b>color</b> given for the command <code>jscurve color,formulas(x)</code> will not be used in that case... but the color argument must still be given in any case (otherwise syntax error...)
18556	bpr	2374	@%jscurve%size 400,400%xrange -10,10%yrange -10,10%multistrokecolors red,green,blue,orange%multilinewidth 1,2,3%multistrokeopacity 0.5,0.8,1.0%jscurve red,sin(x),1/sin(x),sin(x^2)
18552	bpr	2375	*/
		2376	jsplot_cnt++;/* -1 --> 0 */
		2377	stroke_color = get_color(infile,0);
		2378	js_function[JS_MATH] = 1;
		2379	js_function[JS_PLOT] = 1;
		2380	if( tmin != 0 && tmax !=0){use_parametric = TRUE;}
		2381	temp = get_string(infile,1);
		2382	temp = str_replace(temp,",","\",\"");
18557	bpr	2383	tmp_buffer=my_newmem(MAX_BUFFER);
		2384	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var js_plot%d = function(){jsplot(%d,[\"%s\"],[%d],[\"%s\"],[%.2f],[%d],%d,%d,[%f,%f],%d,%d,%d,0);};js_plot%d();",jsplot_cnt,JSPLOT_CANVAS+jsplot_cnt,temp,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],tmin,tmax,plot_steps,use_parametric,use_animate,jsplot_cnt));
18552	bpr	2385	add_to_buffer(tmp_buffer);
		2386	fprintf(js_include_file,"if(typeof(all_jsplots) !== 'number'){var all_jsplots;};all_jsplots = %d;",jsplot_cnt);
11806	schaersvoo	2387
18552	bpr	2388	/* we need to create multiple canvasses, so we may zoom and pan ?? */
		2389	break;
		2390	case JSMATH:
		2391	/*
18556	bpr	2392	@ jsmath some_math_function
		2393	@ will calculate an y-value from a userinput x-value and draws a crosshair on these coordinates.
		2394	@ default labels ''x`` and ''y``; the commands ''xlabel some_x_axis_name`` and ''ylabel some_y_axis_name`` will set the label for the input fields
		2395	@ use command 'css some_css' for styling the display fields. Use command 'fontsize int' to size the labels ''x`` and ''y``
		2396	@ the client browser will convert your math function to javascript math.<br>use parenthesis and rawmath: use 2*x instead of 2x etc etc<br>no check is done on the validity of your function and/or syntax<br>use error console to debug any errors...
		2397	@ be aware that the formula's of the plotted function(s) can be found in the page javascript source
		2398	@%jsmath%size 400,400%xrange -10,10%yrange -10,10%jsplot blue,sin(x^2)%jsmath sin(x^2)
18552	bpr	2399	*/
		2400	js_function[DRAW_CROSSHAIRS] = 1;
		2401	js_function[JS_MATH] = 1;
		2402	add_calc_y(get_string(infile,1),font_size,css_class);
		2403	break;
		2404	case KILL:
		2405	/*
		2406	@ kill arguments
		2407	@ arguments may be: affine linear translation rotation slider offset reset
		2408	@ for documentation see: killaffine,killlinear,killtranslation...
		2409	@ multiple arguments are allowed (although not checked for validity...)
		2410	*/
		2411	temp = get_string(infile,1);
		2412	if(strstr(temp,"affine") != 0 ){use_affine = FALSE;affine_matrix[0] = 1.0;affine_matrix[1] = 0.0;affine_matrix[2] = 0.0;affine_matrix[3] = 1.0;affine_matrix[4] = 0.0;affine_matrix[5] = 0.0;}
		2413	if(strstr(temp,"linear") != 0 ){affine_matrix[0] = 1.0;affine_matrix[1] = 0.0;affine_matrix[2] = 0.0;affine_matrix[3] = 1.0;}
		2414	if(strstr(temp,"translation") != 0 \|\| strstr(temp,"translate") != 0 ){affine_matrix[4] = 0.0;affine_matrix[5] = 0.0;}
		2415	if(strstr(temp,"rotation") != 0 \|\| strstr(temp,"rotate") != 0 ){use_rotate = FALSE;angle = 0.0;rotation_center="null";}
		2416	if(strstr(temp,"slider") != 0 ){slider_type = "0";my_sliders = "[-1]";last_slider = use_slider+1;}
		2417	if(strstr(temp,"group") != 0 ){onclick = 0;drag_type = -1;slider_type = "0";my_sliders = "[-1]";last_slider = use_slider+1;use_slider = -1;reset();}
		2418	if(strstr(temp,"reset") != 0 ){if(no_reset == FALSE){no_reset = TRUE;}else{no_reset = FALSE;reset();}}
		2419	if(strstr(temp,"offset") != 0 ){use_offset = 0;}
		2420	break;
		2421	case KILLAFFINE:
		2422	/*
		2423	@ killaffine
		2424	@ keyword: resets the transformation matrix to 1,0,0,1,0,0
		2425	@ note: any active linear transformation will also be reset: tx=0, ty=0
		2426	*/
		2427	use_affine = FALSE;
		2428	affine_matrix[0] = 1.0;
		2429	affine_matrix[1] = 0.0;
		2430	affine_matrix[2] = 0.0;
		2431	affine_matrix[3] = 1.0;
		2432	affine_matrix[4] = 0.0;
		2433	affine_matrix[5] = 0.0;
		2434	break;
		2435	case KILLLINEAR:
		2436	/*
		2437	@ killlinear
		2438	@ keyword: resets the transformation matrix to 1,0,0,1,tx,ty
		2439	@ note:any active transformation or rotation will not be killed (tx,ty remain active)
		2440	*/
		2441	affine_matrix[0] = 1.0;
		2442	affine_matrix[1] = 0.0;
		2443	affine_matrix[2] = 0.0;
		2444	affine_matrix[3] = 1.0;
		2445	break;
		2446	case KILLROTATE:
		2447	/*
18556	bpr	2448	@ killrotate
		2449	@ will set the rotation angle to 0.
18572	bpr	2450	@ will also reset the command <a href="#rotationcenter">rotationcenter</a> to the first (x;y) of the next rotatable/slidable object(s) <br>eg a following rotate command will have the first object point as rotation center
18556	bpr	2451	@ if not set, the rotation center will remain unchanged
		2452	@ note:any active transformation or linear will not be killed (e.g an active transformation matrix remains active)
		2453	@%killrotate%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%rotationcenter 0,0%# slider is active for all following objects until 'killslider'%slider -10,10,300,40,angle degree,Rotate%drag xy%# after dragging the object must be clicked to re-activate the slider%linewidth 4%arrow 0,0,6,0,9,blue%%# reset rotation center to the first (x,y) of the next object/arrow...%killrotate%drag xy%# after dragging the object must be clicked to re-activate the slider%arrow 0,0,6,1,9,red
18552	bpr	2454	*/
		2455	use_rotate = FALSE;
		2456	angle = 0.0;
		2457	rotation_center="null";
		2458	break;
		2459	case KILLSLIDER:
		2460	/*
18556	bpr	2461	@ killslider
		2462	@ keyword (no arguments required)
		2463	@ ends grouping of object under a previously defined slider
18552	bpr	2464	*/
		2465	slider_type = "0";
		2466	my_sliders = "[-1]";
		2467	last_slider = use_slider+1;
		2468	break;
		2469	case KILLTRANSLATION:
		2470	/*
18556	bpr	2471	@ killtranslation
		2472	@ alternative: killtranslate
		2473	@ note: a active linear or affine transformation will not be 100% reset...only tx=0,ty=0
		2474	@ resets the translation matrix a,b,c,d,tx,ty to a,b,c,d,0,0
18552	bpr	2475	*/
		2476	affine_matrix[4] = 0.0;
		2477	affine_matrix[5] = 0.0;
		2478	break;
		2479	case LATEX:
		2480	/*
18556	bpr	2481	@ latex x,y,tex string
		2482	@ alternative: math
18572	bpr	2483	@ note: <b>for a single greek letter</b> ,please be smart and use a command like <a href='#string'>string</a> along with <b>unicode</b> !! <br>possibly together with command <a href="#xyoffset">xoffset, yoffset or xyoffset</a><br> See <a target='new' href='https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode'>https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode</a><br> See <a target='new' href='https://en.wikipedia.org/wiki/Greek_script_in_Unicode'>https://en.wikipedia.org/wiki/Greek_script_in_Unicode</a>
18556	bpr	2484	@ you may also use command <a href="#mathml">mathml</a> for xml strings generated with wims commmand ''mathmlmath`` (will not work on KaTeX enabled WIMS)
		2485	@ transformation commands <a href='#affine'>affine</a>, <a href='#translation'>translation</a> and <a href='#rotate'>rotate</a> are supported.(onclick and drag will work)
		2486	@ can be set onclick: <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects<br>if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
		2487	@ can be set draggable:<code>javascript:read_dragdrop();</code> will return all coordinates in the same order as the canvas script: unmoved object will have their original coordinates...
		2488	@ can be moved/rotated with command <a href='#slider'>slider</a>
		2489	@ snaptogrid is supported
		2490	@ when clicked, the colour of the 'div background' of the 'mathobject' will be determined by the <a href="#fillcolor">fillcolor</a> and <a href="#opacity">opacity</a> settings
		2491	@ userdraw may be combined with 'latex' ; the js-function 'read_canvas()' will contain the coordinates of the drawing.
		2492	@ userdraw may be combined; the read_canvas() will contain the drawing.
		2493	@ draggable or onclick 'external images' from command <a href='#copyresized'>copy or copyresized</a> and all objects from commands <a href='#html'>html</a> or <a href='#obabel'>obabel</a> can be combined with drag and/or onclick mathml
		2494	@ other drag objects (circles/rects etc) are supported, but read_dragdrop() will probably be difficult to interpret...
		2495	@ if inputfields are incorporated in mathml (with id's: id='mathml0',id='mathml1',...id='mathml_n')<br>the user_input values will be read by <code>javascript:read_mathml();</code>. <b>attention</b>: if after this mathml-input object other user-interactions are included, these will read mathml too using "read_canvas();"
		2496	@ If other inputfields (command input / command textarea) or userdraw are performed, the function read_canvas() will not read mathml. Use some generic function to read it....
		2497	@ use keyword <a href='#centered'>centered</a> to center the katex div object on (x1:y1) <br>this may not work as expected for MathJaX [TO BE TESTED]
		2498	@ note: if you want to include external TeX via drag&drop onto a canvasdraw element, use \\mmlid{integer} in the tex-command:''!insmath \\mmlid{1}\\frac{1}{\pi}``<br> (if your wims_mathml does not support it...use <a href="http://85.148.206.56/wims/download/Mathml.tar.gz">this version...</a>)
		2499	@ note: the same is true for all external P,SPAN,DIV,IMG,SVG-images via drag&drop onto a canvasdraw element, use ''onclick=javascript:place_image_on_canvas(this.id)``
		2500	@%latex_drag%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%strokecolor red%drag xy%centered%latex -6,5,\\frac{1}{2}+ \\frac{\\pi}{2}%strokecolor blue%drag xy%centered%latex -3,5,\\frac{1}{3}+ \\frac{\\pi}{3}%strokecolor green%drag xy%centered%latex 0,5,\\frac{1}{4}+ \\frac{\\pi}{4}%strokecolor orange%drag xy%fontfamily 26px Times%centered%latex 3,5,\\frac{1}{5}+ \\frac{\\pi}{6}
		2501	@%latex%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%vline 0,0,green%hline 0,0,green%fontfamily 16px Arial%fillcolor orange%strokecolor blue%linewidth 2%slider 0,4*pi,400,40,angle degree active, %centered%latex 0,0,\\frac{12345}{23456} \\times \\frac{12345}{23456}%translate 4,4%centered%rotate 180%drag xy%html 0,0,<table><tr><th>HTML TABLE</th></tr><tr><th><a href="https://wimsedu.info/">WIMS EDU </a> </th></tr><tr><td><img src="gifs/en.gif"></tr><tr><td><img src="gifs/nl.gif"></tr><tr><td><img src="gifs/fr.gif"></tr><tr><td><img src="gifs/cn.gif"></tr><tr><td><img src="gifs/it.gif"></tr></table>%userdraw arrow2,red
18552	bpr	2502	*/
		2503	js_function[DRAW_XML] = 1;
		2504	for(i=0;i<3;i++){
		2505	switch(i){
		2506	case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		2507	case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system -> pixel height */
		2508	case 2: decimals = find_number_of_digits(precision);
		2509	temp = get_string(infile,1);
		2510	if(use_affine == TRUE ){ transform(2,2);}/* slider will use css-rotate transformation */
		2511	if( use_offset != 0 \|\| drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		2512	int_data[0] = x2px(double_data[0]);
		2513	int_data[1] = y2px(double_data[1]);
		2514	if( use_slider != -1 && onclick == 0 ){ onclick = 5;}
		2515	if( use_slider != -1 && drag_type != -1){ onclick = 5; }
15757	schaersvoo	2516	#ifdef KATEX_INSTALLED
18552	bpr	2517	if( strstr(temp,"\\") != 0 ){ temp = str_replace(temp,"\\","\\\\"); }
		2518	if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
18557	bpr	2519	tmp_buffer=my_newmem(MAX_BUFFER);
		2520	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var draw_xml%d = {id:%d,type:'katex',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt));
15757	schaersvoo	2521	#else
18552	bpr	2522	temp = getMML(temp);/* generate MathML for Firefox or MathJaX */
		2523	if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
18557	bpr	2524	tmp_buffer=my_newmem(MAX_BUFFER);
		2525	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt));
15757	schaersvoo	2526	#endif
18552	bpr	2527	add_to_buffer(tmp_buffer);
		2528	if(onclick != 0 ){object_cnt++;}
		2529	drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		2530	break;
		2531	default:break;
		2532	}
		2533	}
		2534	reset();
		2535	break;
		2536	case LATTICE:
		2537	/*
18556	bpr	2538	@ lattice x0,y0,xv1,yv1,xv2,yv2,n1,n2,color
		2539	@ can <b>not</b> be set ''onclick`` or ''drag xy``
		2540	@%lattice%size 400,400%xrange -10,10%yrange -10,10%fillcolor red%linewidth 2%lattice -10,-10,0,1,1,1,10,10,red%fillcolor blue%lattice 10,-10,0,1,-1,1,10,10,blue
18552	bpr	2541	*/
		2542	js_function[DRAW_LATTICE] = 1;
		2543	for( i = 0; i<9; i++){
		2544	switch(i){
		2545	case 0: int_data[0] = x2px(get_real(infile,0));break; /* x0-values -> x-pixels*/
		2546	case 1: int_data[1] = y2px(get_real(infile,0));break; /* y0-values -> y-pixels*/
		2547	case 2: int_data[2] = (int) (get_real(infile,0));break; /* x1-values -> x-pixels*/
		2548	case 3: int_data[3] = (int) -1(get_real(infile,0));break; / y1-values -> y-pixels*/
		2549	case 4: int_data[4] = (int) (get_real(infile,0));break; /* x2-values -> x-pixels*/
		2550	case 5: int_data[5] = (int) -1(get_real(infile,0));break; / y2-values -> y-pixels*/
		2551	case 6: int_data[6] = (int) (get_real(infile,0));break; /* n1-values */
		2552	case 7: int_data[7] = (int) (get_real(infile,0));break; /* n2-values */
		2553	case 8: stroke_color=get_color(infile,1);
		2554	decimals = find_number_of_digits(precision);
18557	bpr	2555	tmp_buffer=my_newmem(MAX_BUFFER);
		2556	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_lattice(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,\"%s\",%.2f,\"%s\",%.2f,%d,%.2f,%d); ",STATIC_CANVAS,line_width,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_rotate,angle,use_filled));
18552	bpr	2557	add_to_buffer(tmp_buffer);break;
		2558	default:break;
		2559	}
		2560	}
		2561	reset();
		2562	break;
		2563	case LINEAR:
		2564	/*
18556	bpr	2565	@ linear a,b,c,d
		2566	@ defines a transformation matrix for subsequent objects
		2567	@ use keyword <a href='#killlinear'>killlinear</a> to end the transformation...the next objects will be drawn in the original x/y-range
		2568	@ a: Scales the drawings horizontally
		2569	@ b: Skews the drawings horizontally
		2570	@ c: Skews the drawings vertically
		2571	@ d: Scales the drawings vertically
		2572	@ the data precision may be set by preceding command ''precision int``
		2573	@ note: any active translation (tx,ty) is not changed
		2574	@%linear%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%fcircle 5,5,40,blue%linear 0.2,0,0,0.2%fcircle 5,5,40,green
18552	bpr	2575	*/
		2576	for(i = 0 ; i<4;i++){
		2577	switch(i){
		2578	case 0: affine_matrix[0] = get_real(infile,0);break;
		2579	case 1: affine_matrix[1] = get_real(infile,0);break;
		2580	case 2: affine_matrix[2] = get_real(infile,0);break;
		2581	case 3: affine_matrix[3] = get_real(infile,1);
		2582	affine_matrix[4] = 0;affine_matrix[5] = 0;
		2583	use_affine = TRUE;
		2584	break;
		2585	default: break;
		2586	}
		2587	}
		2588	reset();
		2589	break;
		2590	case LINE:
		2591	/*
		2592	@ line x1,y1,x2,y2,color
		2593	@ draw a line through points (x1:y1)--(x2:y2) in color ''color``
		2594	@ or use command ''curve color,formula`` to draw the line (uses more points to draw the line; is however better draggable)
		2595	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		2596	@%line%size 400,400%xrange -10,10%yrange -10,10%line 0,1,2,-1,green
		2597	*/
		2598	for(i=0;i<5;i++){
		2599	switch(i){
		2600	case 0: double_data[10]= get_real(infile,0);break; /* x-values */
		2601	case 1: double_data[11]= get_real(infile,0);break; /* y-values */
		2602	case 2: double_data[12]= get_real(infile,0);break; /* x-values */
		2603	case 3: double_data[13]= get_real(infile,0);break; /* y-values */
		2604	case 4: stroke_color=get_color(infile,1);/* name or hex color */
		2605	if( double_data[10] == double_data[12] ){ /* vertical line*/
		2606	double_data[1] = xmin;
		2607	double_data[3] = ymax;
		2608	double_data[0] = double_data[10];
		2609	double_data[2] = double_data[10];
		2610	}
		2611	else{
		2612	if( double_data[11] == double_data[13] ){ /* horizontal line */
		2613	double_data[1] = double_data[11];
		2614	double_data[3] = double_data[11];
		2615	double_data[0] = ymin;
		2616	double_data[2] = xmax;
		2617	}
		2618	else {
		2619	/* m */
		2620	double_data[5] = (double_data[13] - double_data[11]) /(double_data[12] - double_data[10]);
		2621	/* q */
		2622	double_data[6] = double_data[11] - ((double_data[13] - double_data[11]) /(double_data[12] - double_data[10]))*double_data[10];
		2623	/xmin,mxmin+q,xmax,mxmax+q/
		2624	double_data[1] = (double_data[5])*(xmin)+(double_data[6]);
		2625	double_data[3] = (double_data[5])*(xmax)+(double_data[6]);
		2626	double_data[0] = xmin;
		2627	double_data[2] = xmax;
		2628	}
		2629	}
		2630	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		2631	if(use_affine == TRUE ){ transform(4,2);}
		2632	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2633	decimals = find_number_of_digits(precision);
18557	bpr	2634	tmp_buffer=my_newmem(MAX_BUFFER);
		2635	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2636	add_to_buffer(tmp_buffer);
		2637	if(onclick != 0){object_cnt++;}
		2638	/* object_cnt++;*/
		2639	reset();
		2640	break;
		2641	}
		2642	}
		2643	dragstuff[4] = 1;
		2644	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2645	break;
		2646	case LINES:
		2647	/*
		2648	@ lines color,x1,y1,x2,y2...x_n-1,y_n-1,x_n,y_n
		2649	@ draw multiple lines through points (x1:y1)--(x2:y2) ...(x_n-1:y_n-1)--(x_n:y_n) in color 'color'
		2650	@ or use multiple commands ''curve color,formula`` or ''jscurve color,formule`` to draw the line <br>(uses more points to draw the line; is however better draggable)
		2651	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		2652	@%lines%size 400,400%xrange -10,10%yrange -10,10%lines green,0,1,1,3,0,0,1,3,0,0,-2,1
		2653	*/
		2654	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		2655	fill_color = stroke_color;
		2656	i=0;
		2657	while( ! done ){ /* get next item until EOL*/
		2658	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		2659	if(i%2 == 0 ){
		2660	double_data[i] = get_real(infile,0); /* x */
		2661	}
		2662	else {
		2663	double_data[i] = get_real(infile,1); /* y */
		2664	}
		2665	i++;
		2666	}
		2667	decimals = find_number_of_digits(precision);
		2668	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2669	for(c = 0 ; c < i-1 ; c = c+4){
		2670	if(double_data[c] == double_data[c+2] ){ /* vertical line*/
		2671	double_data[c+1] = xmin;
		2672	double_data[c+3] = ymax;
		2673	double_data[c+2] = double_data[c];
		2674	}
		2675	else {
		2676	if( double_data[c+1] == double_data[c+3] ){ /* horizontal line */
		2677	double_data[c+3] = double_data[c+1];
		2678	double_data[c] = ymin;
		2679	double_data[c+2] = xmax;
		2680	}
		2681	else {
		2682	/* m */
		2683	double m = (double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]);
		2684	/* q */
		2685	double q = double_data[c+1] - ((double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]))*double_data[c];
		2686	/xmin,mxmin+q,xmax,mxmax+q/
		2687	double_data[c+1] = (m)*(xmin)+(q);
		2688	double_data[c+3] = (m)*(xmax)+(q);
		2689	double_data[c] = xmin;
		2690	double_data[c+2] = xmax;
		2691	}
		2692	}
		2693	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		2694	if(use_affine == TRUE ){ transform(i-1,2);}
18557	bpr	2695	tmp_buffer=my_newmem(MAX_BUFFER);
		2696	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2697	add_to_buffer(tmp_buffer);
		2698	if(onclick != 0){object_cnt++;}
		2699	/* object_cnt++; */
		2700	}
		2701	dragstuff[4] = 1;
		2702	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2703	reset();
		2704	break;
		2705	case LINEWIDTH:
		2706	/*
		2707	@ linewidth int
		2708	@ default 1
		2709	@%linewidth%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%line -5,-5,-5,5,red%linewidth 2%line -4,-5,-4,5,green%linewidth 3%line -3,-5,-3,5,blue%linewidth 4%line -2,-5,-2,5,orange%linewidth 1%line -1,-5,-1,5,brown%linewidth 5%line 1,-5,1,5,cyan%linewidth 6%line 3,-5,3,5,purple%linewidth 7%line 5,-5,5,5,black
		2710	*/
		2711	line_width = (int) (get_real(infile,1));
		2712	break;
		2713	case LEVELCURVE:
		2714	/*
		2715	@ levelcurve color,expression in x/y,l1,l2,...
		2716	@ draws very primitive level curves for expression, with levels l1,l2,l3,...,l_n
		2717	@ the quality is <b>not to be compared</b> with the Flydraw levelcurve. <br>(choose flydraw if you want quality...)
		2718	@ every individual level curve may be set 'onclick / drag xy' <br>e.g. every single level curve (l1,l2,l3...l_n) has a unique identifier
		2719	@ note: the arrays for holding the javascript data are limited in size
		2720	@ note: reduce image size if javascript data arrays get overloaded<br>(command 'plotsteps int' will not control the data size of the plot...)
		2721	@%levelcurve%size 400,400%xrange -10,10%yrange -10,10%levelcurve red,x*y,1,2,3,4
		2722	*/
		2723	fill_color = get_color(infile,0);
		2724	char *fun1 = get_string_argument(infile,0);
		2725	if( strlen(fun1) == 0 ){canvas_error("function is NOT OK !");}
		2726	i = 0;
		2727	done = FALSE;
		2728	while( !done ){
		2729	double_data[i] = get_real(infile,1);
		2730	i++;
		2731	}
		2732	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2733	for(c = 0 ; c < i; c++){
18557	bpr	2734	tmp_buffer=my_newmem(MAX_BUFFER);
		2735	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,16,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_levelcurve(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,double_data[c]),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	2736	add_to_buffer(tmp_buffer);
		2737	if(onclick != 0){object_cnt++;}
		2738	/* object_cnt++; */
		2739	}
		2740	dragstuff[16] = 1;
		2741	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		2742	reset();
		2743	break;
		2744	case LEGEND:
		2745	/*
		2746	@ legend string1:string2:string3....string_n
		2747	@ will be used to create a legend for a graph
		2748	@ also see command <a href='#piechart'>piechart</a>
		2749	@ will use the same colors per default as used in the graphs; use command <a href='#legendcolors'>legendcolors</a> to override the default
		2750	@ use command <a href="#fontsize">fontsize</a> to adjust. (command ''fontfamily`` is not active for command ''legend``)
		2751	@%legend%size 400,400%xrange -10,10%yrange -10,10%bgcolor white%fontsize 16%legend legend 1:legend 2:legend 3:legend 4:this is legend 5:legend 6:another legend abc%legendcolors red:green:blue%grid 1,1,white%# note: command "grid" is mandatory%# just set grid invisible if not wanted
		2752	*/
		2753	temp = get_string(infile,1);
		2754	if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
		2755	legend_cnt++; /* attention: starts with -1: it will be used in piechart etc */
		2756	fprintf(js_include_file,"var legend%d = [\"%s\"];",legend_cnt,temp);
		2757	break;
		2758	case LEGENDCOLORS:
		2759	/*
		2760	@ legendcolors color1:color2:color3:...:color_n
		2761	@ will be used to color a legend: use this command after the legend command ! e.g. <code>legend test1:test2:test3<br>legendcolors blue:red:orange</code>.
		2762	@ make sure the number of colors match the number of legend items
		2763	@ command ''legend`` in case of ''piechart`` and ''barchart`` will use these colours per default (no need to specify ''legendcolors``)
		2764	@%legendcolors%size 400,400%xrange -10,10%yrange -10,10%fontsize 18%legend legend 1:legend 2:legend 3%legendcolors red:green:blue%grid 1,1,grey
		2765	*/
		2766	if(legend_cnt == -1){canvas_error("use command \"legend\" before command \"legendcolors\" ! ");}
		2767	temp = get_string(infile,1);
		2768	if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
		2769	fprintf(js_include_file,"var legendcolors%d = [\"%s\"];",legend_cnt,temp);
		2770	break;
		2771	case LINEGRAPH: /* scheme: var linegraph_0 = [ 'stroke_color','line_width','use_dashed', 'dashtype0','dashtype1','x1','y1',...,'x_n','y_n'];*/
		2772	/*
		2773	@ linegraph x1:y1:x2:y2...x_n:y_n
		2774	@ will plot your data in a graph
		2775	@ may <b>only</b> to be used together with command <a href='#grid'>grid</a>
		2776	@ can be used together with freestyle x-axis/y-axis texts: see commands <a href='#xaxis'>xaxis</a>,<a href='#xaxisup'>xaxisup</a> and <a href='#yaxis'>yaxis</a>
		2777	@ use command <a href='#legend'>legend</a> to provide an optional legend in right-top-corner
		2778	@ also see command <a href='#piechart'>piechart</a>
		2779	@ multiple linegraphs may be used in a single plot
		2780	@ note: your arguments are not checked by canvasdraw: use your javascript console in case of trouble...
		2781	@ <ul><li>use command <a href='#strokecolor'>strokecolor</a> before a command ''linegraph`` to set the color of this graph</li><li>use command <a href='#linewidth'>linewidth</a> before command ''linegraph`` to set linewidth of this graph</li><li>use keyword <a href='#dashed'>dashed</a> before command ''linegraph`` to set dashing of the graph</li><li>if dashing is set, use command <a href='#dashtype'>dashtype</a> before command ''linegraph`` to set the type of dashing of the (individual) graph</li></ul>
		2782	@%linegraph%size 400,400%xrange -10,10%yrange -10,10%strokecolor red%linegraph -10:1:-5:-1:3:3:10:-5%strokecolor blue%linegraph -10:-1:-5:1:3:-3:10:5%dashed%strokecolor green%linegraph -10:2:-5:-2:3:4:10:2%grid 1,1,grey
		2783	*/
		2784	temp = get_string(infile,1);
		2785	if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
		2786	fprintf(js_include_file,"var linegraph_%d = [\"%s\",\"%d\",\"%d\",\"%d\",\"%d\",\"%s\"];",linegraph_cnt,stroke_color,line_width,use_dashed,dashtype[0],dashtype[1],temp);
		2787	linegraph_cnt++;
		2788	reset();
		2789	break;
		2790	case MATHML:
		2791	/*
		2792	@ mathml x1,y1,mathml_string
		2793	@ this command is special for GECKO browsers, and it makes use of Native Mathml
		2794	@ For general use with all browsers, use command <a href='#latex'>latex</a>
		2795	@ can be set <a href='onclick'>onclick</a> and <a href='drag'>drag&drop</a> <br>Note: dragging is fairly primitive dragging of the div-element, and is not done using the <em>dragstuff library</em>
		2796	@ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
		2797	@ command <a href='#rotate'>rotate</a> will rotate the object
		2798	@ the mathml object is centered at (x1:y1)
		2799	@ the ''mathml_string`` can be produced using WIMS commands like ''texmath`` followed by ''mathmlmath``... or write correct TeX and use only ''mathmlmath``
		2800	@ mathml will be displayed in a rectangle left top (x1:y1)
		2801	@ can be set onclick <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects; if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
		2802	@ can be set draggable: <code>javascript:read_dragdrop()</code> will return all coordinates in same order as the canvas script: unmoved objects will have their original coordinates...
		2803	@ snaptogrid is supported...snaptopoints will work, but use with care... due to the primitive dragging. Technically: the dragstuff library is not used... the mathml is embedded in a new div element and not in the html5-canvas.
		2804	@ when clicked, the mathml object will be drawn in red color; the div background color will be determined by the <a href="#fillcolor">fillcolor</a> and <a href="#opacity">opacity</a> settings.
		2805	@ userdraw may be combined with 'mathml' ; the read_canvas() will contain the drawing.
		2806	@ draggable or onclick 'external images' from command <a href='#copyresized'>copy or copyresized</a> can be combined with drag and/or onclick mathml
		2807	@ other drag objects (circles/rects etc) are supported, but read_dragdrop() will probably be difficult to interpret...
		2808	@ if inputfields are incorporated in mathml (with id's: id='mathml0',id='mathml1',...id='mathml_n')<br>the user_input values will be read by javascript:read_mathml();<br><b>attention</b>: if after this mathml-input object other user-interactions are included, these will read mathml too using "read_canvas();"
		2809	@ If other inputfields (command input / command textarea) or userdraw is performed, the function read_canvas() will not read mathml. Use some generic function to read it....
		2810	@ use keyword <a href='#centered'>centered</a> to center the mathml/xml object on (x1:y1)
		2811	@%mathml_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%strokecolor red%mathml -5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml366290"><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none " ><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mn>2</mn></mfrac></mstyle><mo>⋅</mo><msup><mi>x</mi> <mn>2</mn></msup></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><msup><mi>x</mi> <mn>2</mn></msup></mrow></mfrac></mstyle></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%onclick%strokecolor blue%mathml 5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml580175" ><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines="none"><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></mfrac></mstyle></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>
		2812	@%mathml_drag%size 400,400%xrange -10,10%yrange -10,10%drag xy%strokecolor red%mathml -5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml366290"><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none "><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mn>2</mn></mfrac></mstyle><mo>⋅</mo><msup><mi>x</mi> <mn>2</mn></msup></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><msup><mi>x</mi> <mn>2</mn></msup></mrow></mfrac></mstyle></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%drag xy%strokecolor blue%mathml 5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml580175" ><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none "><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></mfrac></mstyle></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%#click left top corner...then drag...
		2813	*/
		2814	js_function[DRAW_XML] = 1;
		2815	for(i=0;i<3;i++){
		2816	switch(i){
		2817	case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		2818	case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system -> pixel height */
		2819	case 2: decimals = find_number_of_digits(precision);
		2820	if(use_affine == TRUE ){ transform(2,2);}/* needs double_data[] */
		2821	if( use_offset != 0 \|\| drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		2822	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		2823	int_data[0] = x2px(double_data[0]);/* needs px */
		2824	int_data[1] = y2px(double_data[1]);
		2825	if( use_slider != -1 && onclick == 0 ){ onclick = 3;}/* no drag&onclick but slideable */
		2826	if( use_slider != -1 && drag_type != -1){ onclick = 5; }
		2827	temp = get_string(infile,1);
		2828	if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
18557	bpr	2829	tmp_buffer=my_newmem(MAX_BUFFER);
		2830	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%d,rotation_center:%s,once:true};draw_xml(draw_xml%d);slidergroup[%d] = null;\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,use_slider,rotation_center,drawxml_cnt,object_cnt));
18552	bpr	2831	add_to_buffer(tmp_buffer);
		2832	if(onclick != 0 ){object_cnt++;}
		2833	drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		2834	/*
		2835	in case inputs are present, trigger adding the read_mathml()
		2836	if no other reply_format is defined
		2837	note: all other reply types will include a reading of elements with id='mathml'+p)
		2838	*/
		2839	if(strstr(temp,"mathml0") != NULL){ if(reply_format == 0 ){reply_format = 16;}} /* no other reply type is defined */
		2840	break;
		2841	default:break;
		2842	}
		2843	}
		2844	reset();
		2845	break;
		2846	case MOUSE:
		2847	/*
18556	bpr	2848	@ mouse color,fontsize
		2849	@ will display the cursor (x:y) coordinates in ''color`` and ''fontsize`` using default fontfamily Arial
		2850	@ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``)
		2851	@%mouse%size 400,400%xrange -10,10%yrange -10,10%mouse red,22
18552	bpr	2852	*/
		2853	stroke_color = get_color(infile,0);
		2854	font_size = (int) (get_real(infile,1));
		2855	tmp_buffer = my_newmem(26);
		2856	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
		2857	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,2);
		2858	js_function[INTERACTIVE] = 1;
		2859	break;
		2860	case MOUSE_DEGREE:
		2861	/*
18556	bpr	2862	@ mouse_degree color,fontsize
		2863	@ will display the angle in degrees between x-axis, (0:0) and the cursor (x:y) in 'color' and 'font size'<br> using a fontfamily Arial
		2864	@ The angle is positive in QI and QIII and the angle value is negative in QII and QIV
		2865	@ note: use command 'mouse' at the end of your script code (the same is true for command 'zoom')
		2866	@%mouse_degree%size 400,400%xrange -10,10%yrange -10,10%userdraw arc,blue%precision 100000%mouse_degree red,22
18552	bpr	2867	*/
		2868	stroke_color = get_color(infile,0);
		2869	font_size = (int) (get_real(infile,1));
		2870	tmp_buffer = my_newmem(26);
		2871	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
		2872	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,3);
		2873	js_function[JS_FIND_ANGLE] = 1;
		2874	js_function[INTERACTIVE] = 1;
		2875	break;
		2876	case MOUSE_DISPLAY:
		2877	/*
18556	bpr	2878	@ display TYPE,color,fontsize
		2879	@ TYPE may be x \| y \| xy \| degree \| radian \| radius
		2880	@ will display the mouse cursor coordinates as x-only,y-only,(x:y), the radius of a circle (this only in case 'userdraw circle(s),color') or the angle in degrees or radians for commands <code>userdraw arc,color</code> or protractor, ruler (if set dynamic).
		2881	@ use commands ''xunit`` and / or ''yunit`` to add the units to the mouse values. The ''degree \| radian`` will always have the appropriate symbol).
		2882	@ just like commands ''mouse``, ''mousex``, ''mousey``, ''mouse_degree``... only other name
		2883	@%display_x%size 400,400%xrange -10,10%yrange -10,10%xunit \\u212B%display x,red,22
		2884	@%display_y%size 400,400%xrange -10,10%yrange -10,10%yunit seconds%display y,red,22
		2885	@%display_xy%size 400,400%xrange -10,10%yrange -10,10%xunit centimetre%yunit seconds%display xy,red,22%userdraw segments,blue
		2886	@%display_deg%size 400,400%xrange -10,10%yrange -10,10%display degree,red,22%fillcolor orange%opacity 200,50%userdraw arc,blue
		2887	@%display_rad%size 400,400%xrange -10,10%yrange -10,10%display radian,red,22%fillcolor orange%opacity 200,50%userdraw arc,blue
		2888	@%display_radius%size 400,400%xrange -10,10%yrange -10,10%xunit cm%xunit \\u212b%display radius,red,22%userdraw circle,blue
18552	bpr	2889	*/
		2890	temp = get_string_argument(infile,0);
		2891	if( strstr(temp,"xy") != NULL ){
		2892	int_data[0] = 2;
		2893	} else {
		2894	if( strstr(temp,"y") != NULL ){
		2895	int_data[0] = 1;
		2896	}else{
		2897	if( strstr(temp,"x") != NULL ){
		2898	int_data[0] = 0;
		2899	}else{
		2900	if(strstr(temp,"degree") != NULL){
		2901	int_data[0] = 3;
		2902	js_function[JS_FIND_ANGLE] = 1;
		2903	}else{
		2904	if(strstr(temp,"radian") != NULL){
		2905	int_data[0] = 4;
		2906	js_function[JS_FIND_ANGLE] = 1;
		2907	}else{
		2908	if(strstr(temp,"radius") != NULL){
		2909	int_data[0] = 5;
		2910	}else{
		2911	int_data[0] = 2;
		2912	}
		2913	}
		2914	}
		2915	}
		2916	}
		2917	}
		2918	stroke_color = get_color(infile,0);
		2919	font_size = (int) (get_real(infile,1));
		2920	tmp_buffer = my_newmem(26);
		2921	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
		2922	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,int_data[0]);
		2923	js_function[INTERACTIVE] = 1;
		2924	break;
		2925	case MOUSE_PRECISION:
		2926	/*
18556	bpr	2927	@ precision int
		2928	@ 1 = no decimals ; 10 = 1 decimal ; 100 = 2 decimals etc
		2929	@ may be used / changed before every object
		2930	@ In case of user interaction (like ''userdraw`` or ''multidraw``), this value will be used to determine the amount of decimals in the reply / answer
		2931	@%precision%size 400,400%xrange -10,10%yrange -10,10%precision 1%userdraw segment,red
18552	bpr	2932	*/
		2933	precision = (int) (get_real(infile,1));
		2934	if(precision < 1 ){precision = 1;};
		2935	break;
		2936	case MOUSEX:
		2937	/*
18556	bpr	2938	@ mousex color,fontsize
		2939	@ will display the cursor x-coordinate in ''color`` and ''font size`` using the fontfamily Arial.
		2940	@ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``).
18552	bpr	2941	*/
		2942	stroke_color = get_color(infile,0);
		2943	font_size = (int) (get_real(infile,1));
		2944	tmp_buffer = my_newmem(26);
		2945	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
		2946	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,0);
		2947	js_function[INTERACTIVE] = 1;
		2948	break;
		2949	case MOUSEY:
		2950	/*
18556	bpr	2951	@ mousey color,fontsize
		2952	@ will display the cursor y-coordinate in ''color`` and ''font size`` using default fontfamily Arial.
		2953	@ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``).
8386	schaersvoo	2954
18552	bpr	2955	*/
		2956	stroke_color = get_color(infile,0);
		2957	font_size = (int) (get_real(infile,1));
		2958	tmp_buffer = my_newmem(26);
		2959	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
		2960	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,1);
		2961	js_function[INTERACTIVE] = 1;
		2962	break;
		2963	case MULTIDASH:
		2964	/*
18556	bpr	2965	@ multidash 0,1,1
		2966	@ meaning draw objects no. 2 (circle) and 3 (segments), in the list of command like <code>multifill points,circle,segments</code>, are dashed
		2967	@ use before command <a href='#multidraw'>multidraw</a>
		2968	@ if not set all objects will be set ''not dashed``... unless a generic keyword ''dashed`` was given before command ''multidraw``
		2969	@ the dash-type is not -yet- adjustable <br>(e.g. command <code>dashtype line_px,space_px</code> will give no control over multidraw objects)
		2970	@ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
		2971	@ always use the same sequence as is used for ''multidraw``
18552	bpr	2972	*/
		2973	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		2974	temp = get_string(infile,1);
		2975	temp = str_replace(temp,",","\",\"");
		2976	fprintf(js_include_file,"var multidash = [\"%s\"];",temp);
		2977	reset();/* if command 'dashed' was given...reset to not-dashed */
		2978	break;
		2979	case MULTIDRAW:
		2980	/*
18556	bpr	2981	@ multidraw obj_type_1,obj_type_2...obj_type_11
		2982	@ for simple single object user drawings you could also use command <a href="#userdraw">userdraw</a>
18572	bpr	2983	@ implemented obj_types:<ul><li>point \| points</li><li>circle \| circles</li><li>line \| lines</li><li>segment \| segments</li><li>arrow \| arrows (use command 'arrowhead int' for size (default value 8 pixels))</li><li>curvedarrow \| curvedarrows</li><li>rect \| rects</li><li>closedpoly<br><b>only one</b> closedpolygon may be drawn.The number of ''corner points`` is not preset (e.g. not limited, freestyle), the polygon is closed when clicking on the first point again..(+/- 10px)</li><li>triangle \| triangles</li><li>parallelogram \| parallelograms</li><li>poly[3-9] \| polys[3-9] draw 3...9 point polygone(s): polys3 is of course triangles</li><li>images</li><li>crosshair \| crosshairs</li><li>function <br>for more function user input fields, use it multiple times<br>for 4 inputfields use : multidraw function,function,function,function</li></ul>
18556	bpr	2984	@ additionally objects may be user labelled, using obj_type ''text``...<br>in this case allways a text input field and if <a href='#multiuserinput'> multiuserinput=1 </a> also (x:y) inputfields will be added to the page.<br>use commands ''fontfamily`` and ''fontcolor`` to adjust (command ''multistrokeopacity`` may be set to adjust text opacity)<br>note: text is always centered on the mouse-click or user-input coordinates !<br>note: no keyboard listeners are used
		2985	@ it makes no sense using something like ''multidraw point,points`` ... <br>something like "multidraw polys4,polys7" will only result in drawing a ''4 point polygone`` and not a ''7 point polygone``: this is a design flaw and not a feature...
		2986	@ note: mouselisteners are only active if "$status != done " (eg only drawing in an active/non-finished exercise) <br> to overrule use command/keyword "status" (no arguments required)
		2987	@ buttons for changing the obj_type (and in case of ''multiuserinput``, some inputfields and buttons) <br>will be present in the reserved div ''tooltip_div`` and can be styled using command 'css some_css'
		2988	@ the button label will be default the ''object primitive name`` (like ''point``, ''circles``).<br>If you want a different label (e.g. an other language), use command ''multilabel``<br>for example in dutch: <br><code>multilabel cirkel,lijnstuk,punten,STOP<br>multidraw circle,segment,points</code><br>(see command <a href='#multilabel'>multilabel</a> for more details)
		2989	@ a right mouse button click will remove the last drawn object of the selected drawing type. All other type of objects are not removed
		2990	@ multidraw is incompatible with command ''tooltip`` (the reserved div_area is used for the multidraw control buttons)
		2991	@ all ''multidraw`` drawings will scale on zooming.<br>this in contrast to the command <a href="#userdraw">userdraw</a>.
		2992	@ wims will <b>not</b> check the amount or validity of your command arguments ! <br>( use javascript console to debug any typo's )
18572	bpr	2993	@ a local function <code>read_canvas%d</code> will read all userbased drawings.<br>The output is always a 16 lines string with fixed sequence.<br>line 1 = points_x+";"+points_y+"\\n"<br>line 2 = circles_x+";"+circles_y+";"+multi_radius+"\\n"<br>line 3 = segments_x+";"+segments_y+"\\n"<br>line 4 = arrows_x+";"+arrows_y+"\\n"<br>line 5 = lines_x+";"+lines_y+"\\n"<br>line 6 = triangles_x+";"+triangles_y+"\\n"<br>line 7 = polys[3-9]_x+";"+polys[3-9]_y+"\\n"<br>line 8 = rects_x +";"+rects_y+"\\n"<br>line 9 = closedpoly_x+";"+closedpoly_y+"\\n"<br>line 10 = parallelogram_x+";"+parallelogram_y"\\n"<br>line 11 = text_x+";"+text_y+";"+text"\\n"<br>line 12 = image_x+";"+image_y+";"+image_id<br>line 13 = curvedarrows_x +";"+ curvedarrows_y +"\\n"<br>line 14 = curvedarrows2_x +";"+ curvedarrows2_y +"\\n"<br>line 15 = crosshairs_x +";"+ crosshairs_y +"\\n"<br>line 16 = userdraw_x +";"+userdraw_y + "\\n" note: this is for single ''userdraw object,color`` and ''replyformat 29``<br>line 17 = userdraw_x +";"+userdraw_y +";"+userdraw_radius + "\\n" note: this is for single ''userdraw object,color`` and ''replyformat 29``<br>The x/y-data are in x/y-coordinate system and display precision may be set by a previous command ''precision 0 \| 10 \| 100 \| 1000...``<br>In case of circles the radius is -for the time being- rounded to pixels<br><b>use the wims "direct exec" tool to see the format of the reply</b>
18556	bpr	2994	@ It is best to prepare / format the student reply in clientside javascript.<br>However in ''wims`` language you could use something like this<br>for example you are interested in the polys5 drawings of a pupil (the pupil may draw multiple poly5 objects...)<br>note: the reply for 2 poly5's is: x11,x12,x13,x14,x15,x21,x22,x23,x24,x25 ; y11,y12,y13,y14,y15,y21,y22,y23,y24,y25<br>rep = !line 7 of reply <br>rep = !translate ';' to '\\n' in $rep <br>pts = 5 # 5 points for polygon <br>x_rep = !line 1 of $rep <br>y_rep = !line 2 of $rep <br>tot = !itemcnt $x_rep <br>num_poly = $[$tot/$pts] <br>idx = 0 <br>!for p=1 to $num_poly <br> !for s=1 to $pts <br>  !increase idx <br>  X = !item $idx of $x_rep <br>  Y = !item $idx of $y_rep <br>  # do some checking <br> !next s <br>!next p <br>
		2995	@ <b>attention</b>: for command argument ''closedpoly``, only one polygone can be drawn. The last point (e.g. the point clicked near the first point) of the array is removed.
		2996	@ technical: all 10 ''draw primitives`` + ''text`` will have their own -transparent- PNG bitmap canvas. <br>So for example there can be a points_canvas entirely separated from a line_canvas.<br>This to avoid the need for a complete redraw when something is drawn to the canvas...(eg only the object_type_canvas is redrawn), this in contrast too many very slow do-it-all HTML5 canvas javascript libraries.<br>The mouselisteners are attached to the canvas-div element.
		2997	@ a special object type is ''images``.<br>if used together with <a href='#imagepalette'>imagepalette</a> a image table will be integrated in the 'control section' of multidraw (set <code>multiuserinput 1</code> for ''images``) if not used with <a href='#imagepalette'>imagepalette</a>, provide the images or div's (<img> tag with bitmap or SVG or anything in a div element) somewhere on the html exercise page, with an onclick handler like:<br><code><img src='gifs/images/dog.svg' onclick='javascript:place_image_on_canvas(this.id);' id="ext_image_1" /><br><img src='gifs/fish.png' onclick='javascript:place_image_on_canvas(this.id);' id="another" /></code><br>etc ... when activating the multidraw ''image`` button, the images can be selected<br> (left mouse button/onclick) and placed on the canvas...left mouse click.<br>using div's will enable you -amongst other content- to add math typesetting from the exercise page onto the canvas.
18572	bpr	2998	@ When you are not content with the default ''multidraw control panel``, you can create your own interface, using a few javascript functions to call the drawprimitives, delete things and ''stop drawing`` in case you also want to drag&drop stuff...</br>To activate this feature, use <a href='#multilabel'>multilabel NOCONTROLS</a><br>The object types are internally represented by the following numbers (making typos will render your exercise null and void)<br>point = 0<br>points =1<br>circle = 2<br>circles = 3<br>line = 4<br>lines = 5<br>segment = 6<br>segments = 7<br>arrow = 8<br>arrows = 9<br>triangle = 10<br>triangles = 11<br>closedspoly = 12<br>text = 13<br>rect = 14<br>rects = 15<br>poly[3-9] = 16<br>polys[3-9] = 17<br>parallelogram = 18<br>parallelograms = 19<br>images = 20<br>curvedarrow = 21<br>curvedarrows = 22<br>curvedarrow2 = 23<br>curvedarrows2 = 24<br>crosshair = 25<br>crosshairs = 26 <br>controls for example:<br><code><input type='button' onclick='javascript:userdraw_primitive=null' value='STOP DRAWING' /><br><input type='button' onclick='javascript:userdraw_primitive=24;multidraw_object_cnt = 0;' value='start drawing curvedarrows2' /> <br><input type='button' onclick='javascript:var fun=eval("clear_draw_area"+canvas_scripts[0]);fun(24,0);' value='REMOVE LAST CURVEDARROW ' /> </code><br> If using multiple canvas scripts in a single page, loop through the canvas_scripts[n] <br>note: if using NOCONTROLS and just a single draw primitive (for example, just: 'multidraw circles'), the object may be drawn directly. (analogue to 'userdraw circles,color')<br>And since a right mouse button click will always remove the last drawn object of the current object type, there is no need for a special "remove button"
18556	bpr	2999	@%multidraw_function%size 400,400%xrange -10,10%yrange -10,10%fontfamily Italic 22px Helvetica%axis%axisnumbering%precision 0%grid 2,2,grey,1,1,5,black%multicolors red,green,blue%fontcolor orange%multilinewidth 1,2,3%multidraw text,function,function,function,line
		3000	@%multidraw%size 400,400%xrange -10,10%yrange -10,10%multidash 1,0%multilinewidth 1,2%multistrokecolors red,blue%multisnaptogrid 1,1%multilabel LINES,CIRCLES,STOP DRAWING%multidraw lines,circles
		3001	@%multidraw_images%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%drag xy%# use special function to read the drag coordinates%copy 0,0,-1,-1,-1,-1,gifs/images/skull_and_crossbones50.png%fontcolor green%fontfamily Bold 42pt Arial%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multiuserinput 0,0,1%css color:blue;%multisnaptogrid 1,1,1%multilinewidth 0,4,0%# attention: use unicode text input without the slash %# \u222D ---> u222D at least will sometimes work%# otherwise cut&past unicode symbols into inputfield...%multilabel TEXT,REACTION ARROW,FLAGS,STOP DRAWING%multidraw text,arrow,images
		3002	@%multidraw_demo%size 800,800%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%css color:blue;%fontfamily Italic 42pt Arial%precision 1%opacity 200,50%snaptogrid%linewidth 3%filled%multistrokecolors red,green,blue,orange,yellow,purple,black,cyan,red,green,blue,orange,green,purple,black,cyan%multifillcolors red,green,blue,orange,yellow,purple,black,cyan,red,green,blue,orange,brown,purple%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multidraw closedpoly,segments,rect,parallelogram,triangles,poly5,points,lines,arrows,circles,text,curvedarrows,curvedarrows2,images
		3003	@%multidraw_NOCONTROLS%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%linewidth 3%strokecolor green%fillcolor blue%filled%opacity 255,60%multilabel NOCONTROLS%multidraw circles%# RIGHT MOUSE CLICK REMOVES LAST OBJECT
18552	bpr	3004	*/
		3005	js_function[INTERACTIVE] = 1;
		3006	if(js_function[JS_ZOOM] == 1){use_zoom = 1;} /* use noisy zoom_code, when command zoom is given before command 'multidraw' */
		3007	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3008	if( use_userdraw == 1 ){canvas_error("Only one userdraw primitive may be used in command 'userdraw' use command 'multidraw' for this...");}
		3009	use_userdraw = 2;
		3010	temp = get_string(infile,1);
		3011	fprintf(js_include_file,"\
		3012	var MMP = %d;\
		3013	if( typeof(multisnaptogrid) == 'undefined' && multisnaptogrid == null){var multisnaptogrid = new Array(MMP);for(var i=0;i<MMP;i++){multisnaptogrid[i] = %d;};};\
		3014	if( typeof(multistrokecolors) === 'undefined' && multistrokecolors == null){ var multistrokecolors = new Array(MMP);for(var i=0;i<MMP;i++){multistrokecolors[i] = '%s';};};\
		3015	if( typeof(multifillcolors) === 'undefined' && multifillcolors == null ){var multifillcolors = new Array(MMP);for(var i=0;i<MMP;i++){multifillcolors[i] = '%s';};};\
		3016	if( typeof(multistrokeopacity) === 'undefined' && multistrokeopacity == null){var multistrokeopacity = new Array(MMP);for(var i=0;i<MMP;i++){multistrokeopacity[i] = %.2f;};};\
		3017	if( typeof(multifillopacity) === 'undefined' && multifillopacity == null){var multifillopacity = new Array(MMP);for(var i=0;i<MMP;i++){multifillopacity[i] = %.2f;};};\
		3018	if( typeof(multilinewidth) === 'undefined' && multilinewidth == null){var multilinewidth = new Array(MMP);for(var i=0;i<MMP;i++){multilinewidth[i] = %d;};};\
		3019	if( typeof(multifill) === 'undefined' && multifill == null){var multifill = new Array(MMP);for(var i=0;i<MMP;i++){multifill[i] = %d;};};\
		3020	if( typeof(multidash) === 'undefined' && multidash == null){var multidash = new Array(MMP);for(var i=0;i<MMP;i++){multidash[i] = %d;};};\
		3021	if( typeof(multilabel) === 'undefined' && multilabel == null){var multilabel = [\"%s\",\"stop drawing\"];};\
		3022	if( typeof(multiuserinput) === 'undefined' && multiuserinput == null){var multiuserinput = new Array(MMP);for(var i=0;i<MMP;i++){multiuserinput[i] = '0';};};\
		3023	var arrow_head = %d;var multifont_color = '%s';var multifont_family = '%s';var forbidden_zone = [xsize+2,ysize+2];",
		3024	MAX_MULTI_PRIMITIVES,
		3025	use_snap,
		3026	stroke_color,
		3027	fill_color,
		3028	stroke_opacity,
		3029	fill_opacity,
		3030	line_width,
		3031	use_filled,
		3032	use_dashed,
		3033	str_replace(temp,",","\",\""),
		3034	arrow_head,font_color,font_family);
		3035	add_js_multidraw(temp,css_class,use_offset,int_data[MAX_MULTI_PRIMITIVES+1],crosshair_size,use_zoom);
		3036	/* no_controls == int_data[MAX_MULTI_PRIMITIVES+1] */
		3037	reply_precision = precision;
		3038	if(strstr(temp,"text") != NULL){
		3039	js_function[JS_SAFE_EVAL] = 1;
		3040	js_function[DRAW_SUBSUP] = 1;
		3041	}
		3042	if(strstr(temp,"function") != NULL){
		3043	int pp, funs = count_substring(temp, "function");
		3044	js_function[JS_SAFE_EVAL] = 1;
		3045	js_function[JS_RAWMATH] = 1;
		3046	js_function[DRAW_JSFUNCTION] = 1;
		3047	js_function[JS_MATH] = 1;
		3048	js_function[JS_PLOT] = 1;
		3049	for(pp = 0 ; pp< funs ;pp++){
		3050	add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
		3051	input_cnt++;
		3052	jsplot_cnt++;
		3053	}
		3054	fprintf(js_include_file,"if(typeof(all_jsplots) !== 'number'){var all_jsplots;};all_jsplots = %d;function redraw_userdraw(){redraw_jsplot();return;};",jsplot_cnt);
		3055	}
		3056	/* the canvasses range from 1000 ... 1008 */
		3057	if( reply_format == 0){reply_format = 29;}
		3058	reset();/* if command 'filled' / 'dashed' was given...reset all */
		3059	break;
		3060	case MULTILABEL:
		3061	/*
18556	bpr	3062	@ multilabel button_label_1,button_label_2,...,button_label_8,'stop drawing text'
		3063	@ use before command <a href='#multidraw'>multidraw</a>
		3064	@ if not set all labels (e.g. the value of input type 'button') will be set by the english names for the draw_primitives (like 'point','circle'...)
		3065	@ the ''stop drawing`` button text <b>must</b> be the last item on the ''multilabel`` -list <br>for example:<br><code>multilabel punten,lijnen,Stop met Tekenen<br>multidraw points,lines</code>
		3066	@ all buttons can be ''styled`` by using command <code>css</code><br><b>note:</b>If you want to add some CSS style to the buttons...<br>the id's of the ''draw buttons`` are their english command argument<br>(e.g. id="canvasdraw_points" for the draw points button).<br>the id of the ''stop drawing`` button is "canvasdraw_stop_drawing".<br>the id of the "OK" button is ''canvasdraw_ok_button``
		3067	@ wims will not check the amount or validity of your input
		3068	@ always use the same sequence as is used for ''multidraw``
		3069	@ if you don't want the controls, and want to write your own interface, set <code>multilabel NOCONTROLS</code>
18552	bpr	3070	*/
		3071	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3072	temp = get_string(infile,1);
		3073	if( strcasestr(temp,"NOCONTROLS") ){
		3074	int_data[MAX_MULTI_PRIMITIVES+1] = 1; /int_data[25] = 1 --> 'no_controls = 1' in canvasmacro.c /
		3075	fprintf(js_include_file,"var multilabel = null;");
		3076	}
		3077	else {
		3078	int_data[MAX_MULTI_PRIMITIVES+1] = 0; /* so DO use control buttons etc */
		3079	temp = str_replace(temp,",","\",\"");
		3080	fprintf(js_include_file,"var multilabel = [\"%s\"];",temp);
		3081	}
		3082	break;
		3083	case MULTILINEWIDTH:
		3084	/*
18556	bpr	3085	@ multilinewidth linewidth_1,linewidth_2,...,linewidth_8
		3086	@ use before command <a href='#multidraw'>multidraw</a>
		3087	@ if not set all line widths will be set by a previous command ''linewidth int``
		3088	@ use these up to 7 different line widths for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
		3089	@ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
		3090	@ always use the same sequence as is used for ''multidraw``
18552	bpr	3091	*/
		3092	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3093	temp = get_string(infile,1);
		3094	temp = str_replace(temp,",","\",\"");
		3095	fprintf(js_include_file,"var multilinewidth = [\"%s\"];",temp);
		3096	break;
		3097	case MULTIFILL:
		3098	/*
18556	bpr	3099	@ multifill 0,0,1,0,1,0,0
		3100	@ meaning draw objects no. 3 and 5, in the list of command ''multifill``, are filled (if the object is fillable...and not a line,segment,arrow or point...)
		3101	@ using a fillpattern: multifill 0,1,2,5,3,4<br>meaning: first object is not filled...second object is solid color filled...2=grid \| 3=hatch \| 4=diamond \| 5=dot
		3102	@ use before command <a href='#multidraw'>multidraw</a>
		3103	@ if not set all objects -except point\|points- will be set ''not filled``... unless a command <code>filled</code> was given before command <code>multifill</code>
		3104	@ only suitable for draw_primitives like ''circle \| circles``, ''triangle \| triangles``, ''rect \| rects``, ''poly[3-9] \| polys[3-9]`` and ''polygon``
		3105	@ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
		3106	@ always use the same sequence as is used for ''multidraw``
18552	bpr	3107	*/
		3108	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3109	i=0;
		3110	while( ! done ){ /* get next item until EOL*/
		3111	if(i > MAX_MULTI_PRIMITIVES){canvas_error("too many multidraw primitives...read the documentation...");}
		3112	int_data[i] = (int)(get_real(infile,1)); /* 0,1,2,3,4,5 */
		3113	if(int_data[i] < 0 \|\| int_data[i] > 5 ){canvas_error("the only possible multifill arguments are: 0,1,2,3,4,5 ");}
		3114	if(int_data[i] > 1 ){use_filled = 2;js_function[DRAW_FILL_PATTERN] = 1;}/* switch to trigger pattern filling */
		3115	i++;
		3116	}
		3117	fprintf(js_include_file,"var multifill = %s ;",data2js_array(int_data,i-1));
		3118	break;
		3119	case MULTIFILLCOLORS:
		3120	/*
18556	bpr	3121	@ multifillcolors color_name_1,color_name_2,...,color_name_8
		3122	@ use before command <a href='#multidraw'>multidraw</a>
		3123	@ if not set all fillcolors (for circle \| triangle \| poly[3-9] \| closedpoly ) will be ''stroke_color``, ''fill_opacity``
		3124	@ use these up to 6 colors for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_n</code>
		3125	@ wims will <b>not</b> check if the number of colours matches the amount of draw primitives...
		3126	@ always use the same sequence as is used for ''multidraw``
		3127	@ can also be used with command <a href='#userdraw'>userdraw clickfill,color</a> when more than one fillcolor is wanted.<br>in that case use for example <a href='#replyformat'>replyformat 10</a> ... reply=x1:y1:color1,x2:y2:color2...<br>the colors will restart at the first color, when there are more fill-clicks than multi-fill-colors<br>if more control over the used colours is wanted, see command <a href='#colorpalette'>colorpalette color1,color2...</a>
18552	bpr	3128	*/
		3129	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3130	fprintf(js_include_file,"var multifillcolors = [");
		3131	while( ! done ){
		3132	temp = get_color(infile,1);
		3133	fprintf(js_include_file,"\"%s\",",temp);
		3134	}
		3135	fprintf(js_include_file,"\"0,0,0\"];");/* add black to avoid trouble with dangling comma... */
		3136	break;
		3137	case MULTIFILLOPACITY:
		3138	/*
18556	bpr	3139	@ multifillopacity fill_opacity_1,fill_opacity_2,...,fill_opacity_8
		3140	@ float values 0 - 1 or integer values 0 - 255
		3141	@ use before command <a href='#multidraw'>multidraw</a>
		3142	@ if not set all fill opacity_ will be set by previous command <code>opacity int,int</code> and keyword ''filled``
		3143	@ use these up to 7 different stroke opacities for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_y</code>
		3144	@ wims will not check the amount or validity of your input
		3145	@ always use the same sequence as is used for ''multidraw``
18552	bpr	3146	*/
		3147	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3148	temp = get_string(infile,1);
		3149	temp = str_replace(temp,",","\",\"");
		3150	fprintf(js_include_file,"var multifillopacity = [\"%s\"];",temp);
		3151	break;
		3152	case MULTISNAPTOGRID:
		3153	/*
18556	bpr	3154	@ multisnaptogrid 0,1,1
		3155	@ alternative: multisnap
		3156	@ meaning draw objects no. 2 (circle) and 3 (segments), in the list of command like <code>multifill points,circle,segments</code>, will snap to the xy-grid (default 1 in x/y-coordinate system: see command <a href='#snaptogrid'>snaptogrid</a>)
		3157	@ freehand drawing...specify precision for reply: all objects snap to grid <code>multisnaptogrid 1,1,1,...</code>
		3158	@ only the xy-values snap_to_grid: all objects snap to grid <code>multisnaptogrid 1,1,1,...</code>
		3159	@ only the x-values snap_to_grid: all objects snap to x-grid <code>multisnaptogrid 2,2,2,...</code>
		3160	@ only the y-values snap_to_grid: all objects snap to y-grid <code>multisnaptogrid 3,3,3,...</code>
		3161	@ if <a href='#snaptopoints'>snaptopoints</a> is defined: all objects snap to points <code>multisnaptogrid 4,4,4,...</code> <br><b>make sure to define the points to snap on...</b> use command <a href='#snaptopoints'>snaptopoints</a>
		3162	@ <code>multisnaptogrid 0,1,2,3,4<br>multidraw text,arrow,line,circle,image</code><br>''text`` is free hand, ''arrow`` is snap to grid, ''line`` is snap to x-grid, ''circle`` is snap to y-grid, ''image`` is snap to points defined by command <a href='#snaptopoints'>snaptopoints</a>
		3163	@ use before command <a href='#multidraw'>multidraw</a>
		3164	@ attention: if not set all objects will be set ''no snap``... unless a generic command ''snaptogrid`` was given before command ''multidraw``
		3165	@ commands <a href='#xsnaptogrid'>xsnaptogrid</a>, <a href='#ysnaptogrid'>ysnaptogrid</a>, <a href='#snaptofunction'>snaptofunction</a> are <b>not</b> supported amd only functional for command <a href='#userdraw'>userdraw</a>
		3166	@ always use the same sequence as is used for ''multidraw``
		3167	@ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
18552	bpr	3168	*/
		3169	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3170	temp = get_string(infile,1);
		3171	fprintf(js_include_file,"var multisnaptogrid = [%s];",temp);
		3172	reset();/* if command 'dashed' was given...reset to not-dashed */
		3173	break;
		3174	case MULTISTROKECOLORS:
		3175	/*
18556	bpr	3176	@ multistrokecolors color_name_1,color_name_2,...,color_name_8
		3177	@ use before command <a href='#multidraw'>multidraw</a>
		3178	@ if not set all colors will be ''stroke_color``, ''stroke_opacity``
		3179	@ use these up to 6 colors for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
		3180	@ wims will <b>not</b> check if the number of colours matches the amount of draw primitives...
		3181	@ always use the same sequence as is used for ''multidraw``
18552	bpr	3182	*/
		3183	if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3184	fprintf(js_include_file,"var multistrokecolors = [");
		3185	while( ! done ){
		3186	temp = get_color(infile,1);
		3187	fprintf(js_include_file,"\"%s\",",temp);
		3188	}
		3189	fprintf(js_include_file,"\"0,0,0\"];");/* add black to avoid trouble with dangling comma... */
		3190	break;
		3191	case MULTISTROKEOPACITY:
		3192	/*
18556	bpr	3193	@ multistrokeopacity stroke_opacity_1,stroke_opacity_2,...,stroke_opacity_7
		3194	@ float values 0 - 1 or integer values 0 - 255
		3195	@ use before command <a href='#multidraw'>multidraw</a>
		3196	@ if not set all stroke opacity_ will be set by previous command <code>opacity int,int</code>
		3197	@ use these up to 7 different stroke opacities for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
		3198	@ wims will not check the amount or validity of your input
		3199	@ always use the same sequence as is used for ''multidraw``
18552	bpr	3200	*/
		3201	if( use_tooltip == 1){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
		3202	temp = get_string(infile,1);
		3203	temp = str_replace(temp,",","\",\"");
		3204	fprintf(js_include_file,"var multistrokeopacity = [\"%s\"];",temp);
		3205	break;
		3206	case MULTIUSERINPUT:
		3207	/*
		3208	@ multiuserinput 0,1,1,0
		3209	@ alternative: multiinput
18572	bpr	3210	@ meaning, when the command ''multidraw`` is used <code>multidraw circles,points,lines,triangles</code><br>objects ''points`` and ''lines`` may additionally be ''drawn`` by direct input (inputfields)<br>all other objects must be drawn with a mouse
18552	bpr	3211	@ in case of circle \| circles a third inputfield for Radius (R) is added. The radius must be in the x/y coordinate system (x-range) and <b>not</b> in pixels...students don't think in pixels.<br>note: R-values will not snap-to-grid
		3212	@ in case of line(s) \| segment(s) \| arrow(s) the user should write <b>x1:y1</b> in the first inputfield and <b>x2:y2</b> in the second.<br>These ''hints`` are pre-filled into the input field.<br>Other coordinate delimiters are '';`` and '',`` e.g. <b>x1;y1</b> or <b>x1,y1</b>.<br>An error message (alert box) will popup when things are not correctly...
		3213	@ in case of a triangle \| poly3, three inputfields are provided.
		3214	@ in case of ''text`` and ''multiuserinput=1, 3`` inputfields will be shown: ''x,y,text``
		3215	@ in case of ''text`` and ''multiuserinput=0, 1`` inputfield will be shown: text ... a mouse click will place the text on the canvas.
		3216	@ may be styled using command <a href="#css">css</a>
		3217	@ an additional button ''stop drawing`` may be used to combine userbased drawings with ''drag&and;drop`` or ''onclick`` elements
		3218	@ when exercise if finished (status=done) the buttons will not be shown.<br>To override this default behaviour use command / keyword ''status``
		3219	@ use before command <a href='#multidraw'>multidraw</a>
		3220	@ always use the same sequence as is used for ''multidraw``
		3221	*/
		3222	/* simple rawmath and input check */
		3223	js_function[JS_SAFE_EVAL] = 1;
		3224	temp = get_string(infile,1);
		3225	temp = str_replace(temp,",","\",\"");
		3226	fprintf(js_include_file,"var multiuserinput = [\"%s\"];",temp);
		3227	break;
		3228	case NORESET:
		3229	/*
		3230	@ noreset
		3231	@ alternative: killreset
		3232	@ keyword
		3233	@ may come in handy if canvas script code is generated using loops
		3234	@ if used the following properties will remain to be valid<br><ul><li>filled</li><li>dash settings</li><li>onclick or drag settings</li><li>centering or offset</li></ul>
		3235	@ if used again, these properies will be reset to the default values and normal behaviour is continued (e.g. the above properties will be reset after 'use' on a canvas object)
		3236	@ etc etc
		3237	@ commands <a href='#slider'>slider</a>, <a href='#linear'>linear</a>, <a href='#rotate'>rotate</a>, <a href='#translate'>translate</a>, <a href='#affine'>affine</a> are always active until the 'kill' commands are given: <br><a href='#killlinear'>killlinear</a>, <a href='#killrotate'>killrotate</a>, <a href='#killtranslate'>killtranslate</a> and <a href='#killaffine'>killaffine</a>
		3238	@ commands like 'opacity', 'linewidth', 'fontsize', 'fontfamily' are only changed when redefined again
		3239	@%noreset%size 400,400%xrange -10,10%yrange -10,10%noreset%drag xy%linewidth 4%filled%rect -4,4,-2,2,blue%triangle -3,-3,0,0,1,-5,green%circle 0,0,50,orange%noreset%rect 2,4,4,2,blue
		3240	@%noreset_oefgraduation%size 800,100%xrange 0,11%yrange -1,1%hline 0,0,black%parallel 0,0,0,0.5,1,0,11,blue%noreset%onclick%centered%text black,1,0.6,large,20%text black,2,0.6,large,30%text black,3,0.6,large,40%text black,4,0.6,large,50%text black,5,0.6,large,60%text black,6,0.6,large,70%text black,7,0.6,large,80%text black,8,0.6,large,90%text black,9,0.6,large,100%text black,10,0.6,large,110
		3241	*/
		3242	if(no_reset == FALSE){no_reset = TRUE;}else{no_reset = FALSE;reset();}
		3243	break;
		3244	case NOXAXIS:
		3245	/*
		3246	@ noxaxis
		3247	@ keyword
		3248	@ if set, the automatic x-axis numbering will be ignored
		3249	@ use command <a href="#axis">axis</a> to have a visual x/y-axis lines (see command <a href="#grid">grid</a>)
		3250	@ to be used before command grid (see <a href="#grid">command grid</a>)
		3251	*/
		3252	fprintf(js_include_file,"x_strings = {};x_strings_up = [];\n");
		3253	use_axis_numbering = -1;
		3254	break;
		3255	case NOYAXIS:
		3256	/*
		3257	@ noyaxis
		3258	@ keyword
		3259	@ if set, the automatic y-axis numbering will be ignored
		3260	@ use command <a href="#axis">axis</a> to have a visual x/y-axis lines (see command <a href="#grid">grid</a>)
		3261	@ to be used before command grid (see <a href="#grid">command grid</a>)
		3262	*/
		3263	fprintf(js_include_file,"y_strings = {};\n");
		3264	break;
		3265	case NUMBERLINE:
		3266	/*
		3267	@ numberline x0,x1,xmajor,xminor,y0,y1
		3268	@ numberline is using xrange/yrange system for all dimensions
		3269	@ multiple numberlines are allowed ; combinations with command <a href='#grid'>grid</a> is allowed; multiple commands <a href='#xaxis'>xaxis numbering</a> are allowed
		3270	@ x0 is start x-value in xrange
		3271	@ x1 is end x-value in xrange
		3272	@ xmajor is step for major division
		3273	@ xminor is divisor of xmajor; using small (30% of major tick) tick marks: this behaviour is ''hardcoded``
		3274	@ is xminor is an even divisor, an extra tickmark (60% of major tick) is added to the numberline: this behaviour is ''hardcoded``
		3275	@ y0 is bottom of numberline; y1 endpoint of major tics
		3276	@ use command <a href="#linewidth">linewidth</a> to control appearance
		3277	@ use <a href="#strokecolor">strokecolor</a> and <a href="#opacity">opacity</a> to controle measure line
		3278	@ for all ticks linewidth and color / opacity are identical.
		3279	@ if command <a href="#xaxis">xaxis</a> or <a href="#xaxisup">xaxisup</a> is not defined, the labeling will be on major ticks: x0...x1
		3280	@ use <a href="#fontfamily">fontfamily</a> and <a href="#fontcolor">fontcolor</a> to control fonts settings
		3281	@ may be used together with <a href="#userdraw">userdraw</a>, <a href="#multidraw">multidraw</a> and <a href="#drag">user drag</a> command family for the extra object drawn onto the numberline
		3282	@ <a href="#snaptogrid">snaptogrid, snaptopoints etc</a> and <a href="#zoom">zooming and panning</a> is supported
		3283	@ onclick and dragging of the numberline are not -yet- supported
		3284	@ note: in case of multiple numberlines, make sure the numberline without special x-axis numbering (e.g. ranging from xmin to xmax) comes first !
		3285	@%numberline%size 400,400%xrange -10,10%yrange -10,10%precision 1%strokecolor black%numberline -8,8,1,6,-4,-3.5%strokecolor red%xaxis -4:AA:-2:BB:2:CC:4:DD%numberline -8,8,1,2,4,4.5%strokecolor green%xaxisup -4:AAA:-2:BBB:2:CCC:4:DDD%numberline -8,8,1,3,2,2.5%strokecolor blue%xaxis -4:AAAA:-2:BBBB:2:CCCC:4:DDDD%numberline -8,8,1,4,0,0.5%strokecolor brown%xaxis -4:AAAAA:-2:BBBBB:2:CCCCC:4:DDDDD%numberline -8,8,1,5,-2,-1.5%zoom red
		3286	*/
		3287	js_function[DRAW_NUMBERLINE] = 1;
		3288	for(i=0;i<6;i++){
		3289	switch(i){
		3290	case 0: double_data[0] = get_real(infile,0);break;/* xmin */
		3291	case 1: double_data[1] = get_real(infile,0);break;/* xmax */
		3292	case 2: double_data[2] = get_real(infile,0);break;/* xmajor */
		3293	case 3: double_data[3] = get_real(infile,0);break;/* xminor */
		3294	case 4: double_data[4] = get_real(infile,0);break;/* ymin */
		3295	case 5: double_data[5] = get_real(infile,1);/* ymax */
		3296	/*
		3297	var draw_numberline%d = function(canvas_type,xmin,xmax,xmajor,xminor,ymin,ymax,linewidth,strokecolor,strokeopacity,fontfamily,fontcolor);
		3298	*/
		3299	fprintf(js_include_file,"snap_x = %f;snap_y = %f;",double_data[2] / double_data[3],double_data[5] - double_data[4] );
18557	bpr	3300	tmp_buffer=my_newmem(MAX_BUFFER);
		3301	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "\ndraw_numberline(%d,%d,%f,%f,%f,%f,%f,%f,%d,\"%s\",%f,\"%s\",\"%s\",%d); ",NUMBERLINE_CANVAS+numberline_cnt,use_axis_numbering,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],line_width,stroke_color,stroke_opacity,font_family,font_color,precision));
18552	bpr	3302	add_to_buffer(tmp_buffer);
		3303	numberline_cnt++;
		3304	break;
		3305	default:break;
		3306	}
		3307	}
		3308	reset();
		3309	break;
		3310	case OBABEL:
		3311	/*
		3312	@ obabel x,y,type input,molecule smiles-code or file location, extra arguments,extra arguments,...
		3313	@ will call the ''obabel`` program, if installed.
		3314	@ output will be an svg file
		3315	@ see documentation of obabel for special keys
		3316	@ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
		3317	@ command <a href='#rotate'>rotate</a> will rotate the object
		3318	@ can be set onclick: <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects<br>if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
		3319	@ can be set draggable: <code>javascript:read_dragdrop();</code> will return all coordinates in the same order as the canvas script: unmoved object will have their original coordinates...
		3320	@ snaptogrid is supported...snaptopoints will work, but use with care...due to the primitive dragging<br>technically: the dragstuff library is not used...the mathml is embedded in a new div element and not in the html5-canvas
		3321	@ external files may be loaded if they are present on the server or in the modules <br>for example:<br> obabel 0,0,mol,$module_dir/caffeine.mol,-P100,-xb none
		3322	@%obabel_smi%size 400,400%xrange -10,10%yrange -10,10%fillcolor green%drag xy%centered%obabel 0,0,smi,-:c1cFccc1cc,-xb none,-xB blue,-xi,-xt,-xa,-xX,-xP180,-h
		3323	*/
		3324	js_function[DRAW_XML] = 1;
		3325	for(i=0;i<4;i++){
		3326	switch(i){
		3327	case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		3328	case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system -> pixel height */
		3329	case 2: URL = get_string_argument(infile,0);break;
		3330	case 3:
		3331	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3332	temp = getSVGMOL(URL,get_string(infile,1));
		3333	decimals = find_number_of_digits(precision);
		3334	if(use_affine == TRUE ){ transform(2,2);}
		3335	if( use_offset != 0 \|\| drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		3336	int_data[0] = x2px(double_data[0]);
		3337	int_data[1] = y2px(double_data[1]);
		3338	if( use_slider != -1 && onclick == 0 ){ onclick = 3;}/* no drag&onclick but slideable */
		3339	if( use_slider != -1 && drag_type > 0 ){ onclick = 5;}/* slider+drag*/
		3340	if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
18557	bpr	3341	tmp_buffer=my_newmem(MAX_BUFFER);
		3342	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "var draw_xml%d = {id:%d,type:'svg',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt));
18552	bpr	3343	add_to_buffer(tmp_buffer);
		3344	if(onclick != 0 ){object_cnt++;}
		3345	drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		3346	break;
		3347	default:break;
		3348	}
		3349	}
		3350	reset();
		3351	break;
		3352	case OPACITY:
		3353	/*
		3354	@ opacity [0-255],[0-255]
		3355	@ opacity [0.0 - 1.0],[0.0 - 1.0]
		3356	@ alternative: transparent
		3357	@ first item is stroke opacity, second is fill opacity
		3358	@%opacity%size 400,400%xrange -10,10%yrange -10,10%opacity 255,0%fcircle -10,0,100,blue%opacity 250,50%fcircle -5,0,100,blue%opacity 200,100%fcircle 0,0,100,blue%opacity 150,150%fcircle 5,0,100,blue%opacity 100,200%fcircle 10,0,100,blue
		3359	*/
		3360	for(i = 0 ; i<2;i++){
		3361	switch(i){
		3362	case 0: double_data[0]= get_real(infile,0);break;
		3363	case 1: double_data[1]= get_real(infile,1);break;
		3364	default: break;
		3365	}
		3366	}
		3367	if( double_data[0] > 255 \|\| double_data[1] > 255 \|\| double_data[0] < 0 \|\| double_data[1] < 0 ){ canvas_error("opacity [0 - 255], [0 - 255] ");}/* typo or non-RGB ? */
18608	bpr	3368	if( double_data[0] > 1 ){ stroke_opacity = (double) (0.0039215double_data[0]); }else{ stroke_opacity = double_data[0];} / 0.0 - 1.0 */
		3369	if( double_data[1] > 1 ){ fill_opacity = (double) (0.0039215double_data[1]); }else{ fill_opacity = double_data[1];} / 0.0 - 1.0 */
18552	bpr	3370	break;
18608	bpr	3371	case STROKEOPACITY:
		3372	/*
		3373	@ strokeopacity [0-255]
		3374	@ strokeopacity [0.0 - 1.0]
		3375	@%strokeopacity%size 400,400%xrange -10,10%yrange -10,10%fillopacity 120%strokeopacity 255%circle -10,0,100,blue%strokeopacity 100%circle -5,0,100,blue%strokeopacity 50%circle 0,0,100,blue
		3376	*/
		3377	double_data[0]= get_real(infile,1);
		3378	if( double_data[0] > 255 \|\| double_data[0] < 0 ){ canvas_error("opacity [0 - 255] ");}/* typo or non-RGB ? */
		3379	if( double_data[0] > 1 ){ stroke_opacity = (double) (0.0039215double_data[0]); }else{ stroke_opacity = double_data[0];} / 0.0 - 1.0 */
		3380	break;
		3381	case FILLOPACITY:
		3382	/*
		3383	@ fillopacity [0-255]
		3384	@ fillopacity [0.0 - 1.0]
		3385	@%fillopacity%size 400,400%xrange -10,10%yrange -10,10%strokeopacity 100%%fillopacity 0%fcircle -10,0,100,blue%fillopacity 50%fcircle -5,0,100,blue%fillopacity 100%fcircle 0,0,100,blue%fillopacity 150%fcircle 5,0,100,blue%fillopacity 200%fcircle 10,0,100,blue
		3386	*/
		3387	double_data[0]= get_real(infile,1);
		3388	if( double_data[0] > 255 \|\| double_data[0] < 0 ){ canvas_error("fillopacity [0 - 255] ");}/* typo or non-RGB ? */
		3389	if( double_data[0] > 1 ){ fill_opacity = (double) (0.0039215double_data[0]); }else{ fill_opacity = double_data[0];} / 0.0 - 1.0 */
		3390	break;
18552	bpr	3391	case ONCLICK:
		3392	/*
18556	bpr	3393	@ onclick
		3394	@ keyword (no arguments required)
		3395	@ if the next object is clicked, its ''object onclick_or_drag sequence number`` in fly script is returned by <code>javascript:read_canvas();</code>
		3396	@ onclick seqeuence numbering starts at ''0``, e.g. if there are 6 objects set onclick, the first onclick object will have id-number ''0``, the last id-number ''5``
		3397	@ line based objects will show an increase in line width<br>font based objects will show the text in ''bold`` when clicked.
		3398	@ the click zone (accuracy) is determined by 2× the line width of the object
		3399	@ onclick and <a href="#drag">drag x\|y\|xy</a> may be combined in a single flyscript (although a single object can <b>not</b> be onclick and draggable at the same time...)
		3400	@ note: not all objects may be set onclick
		3401	@%onclick%size 400,400%xrange -10,10%yrange -10,10%opacity 255,60%linewidth 3%onclick%fcircles blue,-3,3,1,1,2,2,3,1,1%onclick%ftriangles red,-4,-4,-4,0,-3,-2,0,0,4,0,2,-4%onclick%frects green,-4,4,-2,2,1,-1,3,-4
18552	bpr	3402	*/
		3403	fprintf(js_include_file,"use_dragdrop_reply = true;");
		3404	onclick = 1;
		3405	use_dragstuff=2;
		3406	js_function[INTERACTIVE] = 1;
		3407	break;
		3408	case PARALLEL:
		3409	/*
18556	bpr	3410	@ parallel x1,y1,x2,y2,dx,dy,n,[colorname or #hexcolor]
		3411	@ affine transformations should be identical to flydraw
		3412	@ in case of <a href='#rotate'>rotation</a> or <a href='#affine'>affine transformation </a>, command parallel will produce <em>n</em> individual segments, and these may be set ''onclick`` or ''drag xy`` individually.
		3413	@ in case of <em>no rotation or transformations</em> the lines can not be set ''onclick`` or ''drag xy``.
		3414	@ note: a large number of parallel lines (large <em>n</em>) may result in a canvasdraw error (...simplify your script...it produces too many lines...)
		3415	@%parallel_click%size 400,400%xrange -10,10%yrange -10,10%parallel -5,5,-4,-5,0.25,0,40,red%rotate 45%onclick%parallel -5,5,-4,-5,0.25,0,40,blue
		3416	@%parallel%size 400,400%xrange -10,10%yrange -10,10%parallel -5,5,-4,-5,0.25,0,40,red
18552	bpr	3417	*/
		3418	decimals = find_number_of_digits(precision);
		3419	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3420	if( use_rotate == TRUE \|\| use_affine == TRUE ){
		3421	for( i = 0;i < 8; i++ ){
		3422	switch(i){
		3423	case 0: double_data[0] = get_real(infile,0);break; /* x1-values */
		3424	case 1: double_data[1] = get_real(infile,0);break; /* y1-values */
		3425	case 2: double_data[2] = get_real(infile,0);break; /* x2-values */
		3426	case 3: double_data[3] = get_real(infile,0);break; /* y2-values */
		3427	case 4: double_data[4] = get_real(infile,0);break; /* xv */
		3428	case 5: double_data[5] = get_real(infile,0);break; /* yv */
		3429	case 6: int_data[0] = (int) (get_real(infile,0));break; /* n */
		3430	case 7: stroke_color=get_color(infile,1);break;/* name or hex color */
		3431	default: break;
		3432	}
		3433	}
		3434	double_data[6] = double_data[0]; /* x1 */
		3435	double_data[7] = double_data[1]; /* y1 */
		3436	double_data[8] = double_data[2]; /* x2 */
		3437	double_data[9] = double_data[3]; /* y2 */
		3438	for(i = 0 ; i < int_data[0] ; i++){
		3439	double_data[0] = double_data[6] + i*double_data[4];
		3440	double_data[1] = double_data[7] + i*double_data[5];
		3441	double_data[2] = double_data[8] + i*double_data[4];
		3442	double_data[3] = double_data[9] + i*double_data[5];
		3443	if(use_rotate == TRUE ){ rotate(4,angle,rotationcenter,2);}
		3444	if(use_affine == TRUE ){ transform(4,2);}
18557	bpr	3445	tmp_buffer=my_newmem(MAX_BUFFER);
		3446	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3447	add_to_buffer(tmp_buffer);
		3448	if(onclick != 0){object_cnt++;}
		3449	}
		3450	dragstuff[4] = 1;
		3451	}
		3452	else /* use the old parallel version: calculations in javascript */
		3453	{
		3454	for( i = 0;i < 8; i++ ){
		3455	switch(i){
		3456	case 0: double_data[0] = get_real(infile,0);break; /* x1-values */
		3457	case 1: double_data[1] = get_real(infile,0);break; /* y1-values */
		3458	case 2: double_data[2] = get_real(infile,0);break; /* x2-values */
		3459	case 3: double_data[3] = get_real(infile,0);break; /* y2-values */
		3460	case 4: double_data[4] = xmin + get_real(infile,0);break; /* xv */
		3461	case 5: double_data[5] = ymax + get_real(infile,0);break; /* yv */
		3462	case 6: int_data[0] = (int) (get_real(infile,0));break; /* n */
		3463	case 7: stroke_color=get_color(infile,1);/* name or hex color */
18557	bpr	3464	tmp_buffer=my_newmem(MAX_BUFFER);
		3465	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,11,[%.f,%.f,%.f],[%.f,%.f,%.f],[%d,%d,%d],[%d,%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3466	add_to_buffer(tmp_buffer);
		3467	if(onclick != 0){object_cnt++;}
		3468	break;
		3469	default: break;
		3470	}
		3471	dragstuff[11] = 1;
		3472	}
		3473	}
		3474	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3475	reset();
		3476	break;
		3477	case PLOTSTEPS:
		3478	/*
18556	bpr	3479	@ plotsteps a_number
		3480	@ default 150
		3481	@ only used for commands <a href="#curve">curve / plot</a> and <a href="#levelcurve">levelcurve</a>
		3482	@ use with care !
18552	bpr	3483	*/
		3484	plot_steps = (int) (get_real(infile,1));
		3485	break;
		3486	case POINT:
		3487	/*
		3488	@ point x,y,color
		3489	@ draw a single point at (x;y) in color 'color'
		3490	@ use command <code>linewidth int</code> to adjust size
		3491	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		3492	@ will not resize on zooming (command <code>circle x,y,r,color</code> will resize on zooming)
		3493	@ attention: in case of command <a href="#rotate">rotate angle</a> a point has rotation center (0:0) in x/y-range
		3494	@%point%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 1%onclick%point 0,0,red%linewidth 2%onclick%point 1,1,blue%linewidth 3%onclick%point 3,3,green%linewidth 4%point 4,4,orange
		3495	*/
		3496	for(i=0;i<3;i++){
		3497	switch(i){
		3498	case 0: double_data[0] = get_real(infile,0);break; /* x */
		3499	case 1: double_data[1] = get_real(infile,0);break; /* y */
		3500	case 2: stroke_color = get_color(infile,1);/* name or hex color */
		3501	if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		3502	if(use_affine == TRUE ){ transform(2,2);}
		3503	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3504	decimals = find_number_of_digits(precision);
18557	bpr	3505	tmp_buffer=my_newmem(MAX_BUFFER);
		3506	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.f],[%.f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],1.5line_width,line_width,1.5line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3507	add_to_buffer(tmp_buffer);
		3508	/* object_cnt++; */
		3509	if(onclick != 0){object_cnt++;}
		3510	break;
		3511	default: break;
		3512	}
		3513	}
		3514	dragstuff[2] = 1;
		3515	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3516	reset();
		3517	break;
		3518	case POINTS:
		3519	/*
		3520	@ points color,x1,y1,x2,y2,...,x_n,y_n
		3521	@ draw multiple points at given coordinates in color 'color'
		3522	@ use command <code>linewidth int</code> to adjust size
		3523	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		3524	@ attention: in case of command <a href="#rotate">rotate angle</a> the points have rotation center (0:0) in x/y-range
		3525	@%points_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%snaptogrid%linewidth 1%drag xy%points red,0,0,1,1,2,2,3,3%drag x%points blue,0,1,1,2,2,3,3,4
		3526	@%points_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 1%onclick%points red,0,0,1,1,2,2,3,3%onclick%points blue,0,1,1,2,2,3,3,4
		3527	*/
		3528	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		3529	fill_color = stroke_color;
		3530	i=0;
		3531	while( ! done ){ /* get next item until EOL*/
		3532	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3533	if(i%2 == 0 ){
		3534	double_data[i] = get_real(infile,0); /* x */
		3535	}
		3536	else {
		3537	double_data[i] = get_real(infile,1); /* y */
		3538	}
		3539	i++;
		3540	}
		3541	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3542	if(use_affine == TRUE ){ transform(i-1,2);}
		3543	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3544	decimals = find_number_of_digits(precision);
		3545	for(c = 0 ; c < i-1 ; c = c+2){
18557	bpr	3546	tmp_buffer=my_newmem(MAX_BUFFER);
		3547	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.f],[%.f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],1.5line_width,line_width,1.5line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3548	add_to_buffer(tmp_buffer);
		3549	/* object_cnt++; */
		3550	if(onclick != 0){object_cnt++;}
		3551	}
		3552	dragstuff[2] = 1;
		3553	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3554	reset();
		3555	break;
		3556	case POLY:
		3557	/*
		3558	@ poly color,x1,y1,x2,y2...x_n,y_n
		3559	@ polygon color,x1,y1,x2,y2...x_n,y_n
		3560	@ draw closed polygon
		3561	@ use command ''fpoly`` to fill it or use keyword <a href='#filled'>filled</a>
		3562	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		3563	@%polygon_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,25%fillcolor orange%filled%linewidth 2%drag xy%snaptogrid%poly blue,0,0,1,3,3,1,2,4,-1,3
		3564	@%polygon_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,25%fillcolor orange%filled%linewidth 1%onclick%poly green,0,0,1,3,3,1,2,4,-1,3
		3565	*/
		3566	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		3567	i=0;
		3568	c=0;
		3569	while( ! done ){ /* get next item until EOL*/
		3570	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3571	for( c = 0 ; c < 2; c++){
		3572	if(c == 0 ){
		3573	double_data[i] = get_real(infile,0);
		3574	i++;
		3575	}
		3576	else {
		3577	double_data[i] = get_real(infile,1);
		3578	i++;
		3579	}
		3580	}
		3581	}
		3582	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3583	if(use_affine == TRUE ){ transform(i-1,2);}
		3584	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
8386	schaersvoo	3585
18552	bpr	3586	/* draw path: closed & optional filled */
		3587	decimals = find_number_of_digits(precision);
18557	bpr	3588	tmp_buffer=my_newmem(MAX_BUFFER);
		3589	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3590	add_to_buffer(tmp_buffer);
		3591	if(onclick != 0){object_cnt++;}
		3592	reset();
		3593	dragstuff[5] = 1;
		3594	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3595	break;
		3596	case POLYLINE:
		3597	/*
		3598	@ polyline color,x1,y1,x2,y2...x_n,y_n
		3599	@ brokenline color,x1,y1,x2,y2...x_n,y_n
		3600	@ path color,x1,y1,x2,y2...x_n,y_n
		3601	@ remark: there is <b>no</b> command polylines \| brokenlines \| paths ... just use multiple commands <code>polyline, x1,y1,x2,y2...x_n,y_n</code>
		3602	@ remark: there are commands <code>userdraw path(s),color</code> and <code>userdraw polyline,color</code>... these are two entirely different things ! the path(s) userdraw commands may be used for freehand drawing(s)<br>the polyline userdraw command is analogue to this polyline\|brokenline command
		3603	@ the command interconnects the points in the given order with a line (canvasdraw will not close the drawing: use command <a href="#poly">polygon</a> for this)
		3604	@ use command <a href='#segments'>segments</a> for a series of segments. These may be clicked/dragged individually
		3605	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		3606	@%polyline_1%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%snaptogrid%polyline blue,0,0,1,3,3,1,2,4,-1,3
		3607	@%polyline_2%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%onclick%polyline green,0,0,1,3,3,1,2,4,-1,3
		3608	*/
11806	schaersvoo	3609
18552	bpr	3610	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		3611	i=0;
		3612	c=0;
		3613	while( ! done ){ /* get next item until EOL*/
		3614	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3615	for( c = 0 ; c < 2; c++){
		3616	if(c == 0 ){
		3617	double_data[i] = get_real(infile,0);
		3618	i++;
		3619	}
		3620	else {
		3621	double_data[i] = get_real(infile,1);
		3622	i++;
		3623	}
		3624	}
		3625	}
11806	schaersvoo	3626
18552	bpr	3627	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3628	if(use_affine == TRUE ){ transform(i-1,2);}
		3629	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
11806	schaersvoo	3630
18552	bpr	3631	/* draw path: not closed & not filled */
		3632	decimals = find_number_of_digits(precision);
18557	bpr	3633	tmp_buffer=my_newmem(MAX_BUFFER);
		3634	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3635	add_to_buffer(tmp_buffer);
		3636	if(onclick != 0){object_cnt++;}
		3637	/* object_cnt++;*/
		3638	reset();
		3639	dragstuff[4] = 1;
		3640	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3641	break;
		3642	case POPUP:
		3643	/*
18556	bpr	3644	@ popup
		3645	@ keyword (no arguments)
		3646	@ if fly-script starts with keyword ''popup``, the canvas image will be exclusively in a popup window (xsize px × ysize px)
		3647	@ if keyword ''popup`` is used after command <code>size xsize,ysize</code> the canvas will also be displayed in a popup window with size ''xsize × ysize``
		3648	@ the popup window will be embedded into the page as a normal image, when ''status=done``; override with keyword <a href="#status">nostatus</a>
		3649	@ to access the read_canvas and read_dragdrop functions in a popup window, use:<br> <code> function read_all(){<br> if( typeof popup !== 'undefined' ){<br> var fun1 = popup['read_dragdrop'+canvas_scripts[0]];<br>var fun2 = popup['read_canvas'+canvas_scripts[0]];<br> popup.close();<br> return "dragdrop="+fun1()+"\\ncanvas="+fun2();<br> };</code>
		3650	@ to set a canvasdraw produced <a href="#clock">clock</a> or multiple clocks...use something like: <code>popup.set_clock(clock_id,type,diff);</code> as js-function for a button (or something else) in your document page.<br>where in <b>clock_id</b> starts with 0 for the first clock<br><b>type</b> is 1 for Hours,2 for Minutes and 3 for Seconds<br><b>diff</b> is the increment (positive or negative) per click
		3651	@%popup%popup%size 400,400%xrange -2pi,2pi%yrange -5,5%precision 0%axis%axisnumbering%opacity 100,190%grid 1,1,grey,2,2,5,black%linewidth 4%fillcolor blue%trange -pi,pi%animate%linewidth 1%precision 1000%jsplot red,4cos(2x),2sin(3x-pi/6)%strokecolor green%functionlabel H(x)=%userinput function
18552	bpr	3652	*/
		3653	use_tooltip = 2;
		3654	break;
		3655	case PROTRACTOR:
		3656	/*
18556	bpr	3657	@ protractor x,y,x_width,type,mode,use_a_scale
		3658	@ x,y are the initial location
		3659	@ x_width: give the width in x-coordinate system (e.g. not in pixels !)
		3660	@ type = 1: a triangle range 0 - 180<br>type = 2: a circle shape 0 - 360
		3661	@ mode: use -1 to set the protractor interactive (mouse movement of protractor)<br>use mode = '0° - 360°' to set the protractor with a static angle of some value
		3662	@ if the value of the user_rotation angle is to be shown...use command <a href='#display'>display degree,color,fontsize</a><a href='#display'>display radian,color,fontsize</a>
		3663	@ use_scale = 1: the protractor will have some scale values printed; use_scale=0 to disable
		3664	@ the rotating direction of the mouse around the protractor determines the clockwise/ counter clockwise rotation of the protractor...
		3665	@ commands ''stroke_color \| fill_color \| linewidth \| opacity \| font_family`` will determine the looks of the protractor.
		3666	@ default replyformat: reply[0] = x;reply[1] = y;reply[2] = angle_in_radians<br>use command ''precision`` to set the reply precision.
		3667	@ if combined with a ruler, use replyformat = 32
		3668	@ command <code>snap_to_grid</code> may be used to assist the pupil at placing the protractor
		3669	@ when using command ''zoom``, pay <b>attention</b> to the size and symmetry of your canvas<br>...to avoid a partial image, locate the start position near the center of the visual canvas<br>technical: the actual ''protractor`` is just a static generated image in a new canvas-memory<br>This image is only generated once, and a copy of its bitmap is translated & rotated onto the visible canvas.<br>That is the reason for the ''high-speed dragging and rotating``.<br>I've limited its size to xsize × ysize e.g. the same size as the visual canvas...
		3670	@ only one protractor allowed (for the time being)
		3671	@ usage: first left click on the protractor will activate dragging;<br>a second left click will activate rotating (just move mouse around)<br>a third click will freeze this position and the x/y-coordinate and angle in radians will be stored in reply(3)<br>a next click will restart this sequence...
		3672	@%protractor%size 400,400%xrange -5,10%yrange -5,10%hline 0,0,black%vline 0,0,black%fillcolor orange%opacity 255,40%protractor 2,-2,6,0,-1,1,1%mouse red,22
18552	bpr	3673	*/
		3674	for( i = 0;i < 6; i++ ){
		3675	switch(i){
		3676	case 0: double_data[0] = get_real(infile,0);break; /* x-center */
		3677	case 1: double_data[1] = get_real(infile,0);break; /* y-center */
		3678	case 2: double_data[2] = get_real(infile,0);break; /* x-width */
		3679	case 3: int_data[0] = (int)(get_real(infile,0));break; /* type: 1==triangle 2 == circle */
		3680	case 4: int_data[1] = (int)(get_real(infile,0));break; /* passive mode == 0; active mode == -1 */
		3681	case 5: int_data[2] = (int)(get_real(infile,1)); /* use scale */
		3682	decimals = find_number_of_digits(precision);
		3683	if( int_data[1] < 0 ){ js_function[JS_FIND_ANGLE] = 1;}
18557	bpr	3684	add_js_protractor(int_data[0],double_data[0], double_data[1], double_data[2],font_family,stroke_color,stroke_opacity,fill_color,fill_opacity,line_width,int_data[2],int_data[1],use_snap);
		3685	tmp_buffer=my_newmem(MAX_BUFFER);
		3686	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, ";protractor%d(); ",canvas_root_id));
18552	bpr	3687	add_to_buffer(tmp_buffer);
		3688	reply_precision = precision;
		3689	/* no reply from protractor if non-interactive */
		3690	if( reply_format == 0 && int_data[1] == -1 ){reply_format = 30;}
		3691	js_function[INTERACTIVE] = 1;
		3692	break;
		3693	default: break;
		3694	}
		3695	}
		3696	break;
		3697	case PIXELS:
		3698	/*
		3699	@ pixels color,x1,y1,x2,y2,x3,y3...
		3700	@ draw rectangular "points" with diameter 1 pixel
		3701	@ pixels can <b>not</b> be dragged or clicked
		3702	@ "pixelsize = 1" may be changed by command <code>pixelsize int</code>
		3703	@%pixels%size 400,400%opacity 255,255%pixelsize 5%pixels red,1,1,2,2,3,3,4,4,5,5,10,10,20,20,30,30,40,40,50,50,60,60,70,70,80,80,90,90,100,100,120,120,140,140,160,160,180,180,200,200,240,240,280,280,320,320,360,360,400,400%#NOTE pixelsize=5...otherwise you will not see them clearly...
		3704	*/
		3705	js_function[DRAW_PIXELS] = 1;
		3706	stroke_color=get_color(infile,0);
		3707	i=0;
		3708	c=0;
		3709	while( ! done ){ /* get next item until EOL*/
		3710	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3711	for( c = 0 ; c < 2; c++){
		3712	if(c == 0 ){
		3713	double_data[i] = get_real(infile,0);
		3714	i++;
		3715	}
		3716	else {
		3717	double_data[i] = get_real(infile,1);
		3718	}
		3719	}
		3720	}
		3721	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3722	if(use_affine == TRUE ){ transform(i-1,2);}
		3723	decimals = find_number_of_digits(precision);
		3724	/* double_xy2js_array(double xy[],int len,int decimals) /
18557	bpr	3725	tmp_buffer=my_newmem(MAX_BUFFER);
		3726	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_setpixel(%s,\"%s\",%.2f,%d);\n",double_xy2js_array(double_data,i,decimals),stroke_color,stroke_opacity,pixelsize));
18552	bpr	3727	add_to_buffer(tmp_buffer);
		3728	reset();
		3729	break;
		3730	case PIXELSIZE:
		3731	/*
		3732	@ pixelsize int
		3733	@ in case you want to deviate from default pixelsize = 1(...)
		3734	@ pixelsize 100 is of course a filled rectangle 100px × 100px
		3735	*/
		3736	pixelsize = (int) get_real(infile,1);
		3737	break;
15111	schaersvoo	3738
18552	bpr	3739	case PIECHART:
		3740	/*
		3741	@ piechart xc,yc,radius,'data+colorlist'
		3742	@ (xc: yc) center of circle diagram in xrange/yrange
		3743	@ radius in pixels
		3744	@ data+color list: a colon separated list of raw data and corresponding colours<br>canvasdraw will not check validity of colornames...<br>in case of trouble look into javascript debugging of your browser
		3745	@ example data+colorlist: 32:red:65:green:23:black:43:orange:43:yellow:14:white
		3746	@ the number of colors must match the number of data.
		3747	@ if defined <a href='#fillpattern'>fillpattern some_pattern</a> then the pie pieces will be filled with the respective color and a fill pattern...<br>the pattern is cycled from the 4 pattern primitives: grid,hatch,diamond,dot,grid,hatch,diamond,dot,...
		3748	@ use command <a href='#opacity'>opacity</a> to adjust fill_opacity of colours
		3749	@ use command <a href='#legend'>legend</a> to automatically create a legend using the same colours as pie segments; unicode allowed in legend; expect javascript trouble if the amount of ''pie-slices``, ''pie-colors``, ''pie-legend-titles`` do not match, a javascript console is your best friend...<br>use command ''fontfamily`` to set the font of the legend.
		3750	@ use command <a href='centered'>centered</a> to place <a href='#legend'>legend</a> text inside the piechart. The text is using the same color as the pie segment: use (fill) opacity to enhance visibility.
		3751	@%piechart_1%size 300,200%xrange -10,10%yrange -10,10%legend cars:motorcycles:bicycles:trikes%opacity 255,120%piechart -5,0,75,22:red:8:blue:63:green:7:purple%
		3752	@%piechart_2%size 200,200%xrange -10,10%yrange -10,10%fontfamily 16px Arial%centered%legend cars:motorcycles:bicycles:trikes%opacity 255,60%piechart 0,0,100,22:red:8:blue:63:green:7:purple
		3753	*/
		3754	js_function[DRAW_PIECHART] = 1;
		3755	for(i=0;i<5;i++){
		3756	switch(i){
		3757	case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x */
		3758	case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y */
		3759	case 2: int_data[2] = (int)(get_real(infile,1));break;/* radius*/
		3760	case 3: temp = get_string(infile,1);
		3761	if( strstr( temp, ":" ) != 0 ){ temp = str_replace(temp,":","\",\"");}
18557	bpr	3762	tmp_buffer=my_newmem(MAX_BUFFER);
		3763	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_piechart(%d,%d,%d,%d,[\"%s\"],%.2f,%d,\"%s\",%d,%d);\n",PIECHART,int_data[0],int_data[1],int_data[2],temp,fill_opacity,legend_cnt,font_family,use_filled,use_offset));
18552	bpr	3764	add_to_buffer(tmp_buffer);
		3765	break;
		3766	default:break;
		3767	}
		3768	}
		3769	reset();
		3770	break;
		3771	case RANGE:
		3772	/*
		3773	@ range xmin,xmax,ymin,ymax
		3774	@ if not given: 0,xsize,0,ysize (eg in pixels)
		3775	*/
		3776	for(i = 0 ; i<4; i++){
		3777	switch(i){
		3778	case 0: xmin = get_real(infile,0);break;
		3779	case 1: xmax = get_real(infile,1);break;
		3780	case 2: ymin = get_real(infile,0);break;
		3781	case 3: ymax = get_real(infile,1);break;
		3782	default: break;
		3783	}
		3784	}
		3785	if(xmin >= xmax){canvas_error(" xrange is not OK: xmin < xmax !");}
		3786	if(ymin >= ymax){canvas_error(" yrange is not OK: ymin < ymax !");}
		3787	fprintf(js_include_file,"var xmin = %f;var xmax = %f;var ymin = %f;var ymax = %f;",xmin,xmax,ymin,ymax);
		3788	found_size_command = found_size_command+2;
		3789	break;
		3790	case RAYS:
		3791	/*
18556	bpr	3792	@ rays color,xc,yc,x1,y1,x2,y2,x3,y3...x_n,y_n
		3793	@ draw rays in color 'color' and center (xc:yc)
		3794	@ may be set draggable or onclick (every individual ray)
		3795	@%rays_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%rays blue,0,0,3,9,-3,5,-4,0,4,-9,7,9,-8,1,-1,-9
		3796	@%rays_drag_xy%size 400,400%xrange -10,10%yrange -10,10%drag xy%rays blue,0,0,3,9,-3,5,-4,0,4,-9,7,9,-8,1,-1,-9
18552	bpr	3797	*/
		3798	stroke_color=get_color(infile,0);
		3799	fill_color = stroke_color;
		3800	double_data[0] = get_real(infile,0);/* xc */
		3801	double_data[1] = get_real(infile,0);/* yc */
		3802	i=2;
		3803	while( ! done ){ /* get next item until EOL*/
		3804	if(i > MAX_INT - 1){canvas_error("in command rays too many points / rays in argument: repeat command multiple times to fit");}
		3805	if(i%2 == 0 ){
		3806	double_data[i] = get_real(infile,0); /* x */
		3807	}
		3808	else {
		3809	double_data[i] = get_real(infile,1); /* y */
		3810	}
		3811	fprintf(js_include_file,"/* double_data[%d] = %f */\n",i,double_data[i]);
		3812	i++;
		3813	}
		3814	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3815	if(use_affine == TRUE ){ transform(i-1,2);}
		3816	if( i%2 != 0 ){canvas_error("in command rays: unpaired x or y value");}
		3817	decimals = find_number_of_digits(precision);
		3818	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3819	for(c=2; c<i;c = c+2){
18557	bpr	3820	tmp_buffer=my_newmem(MAX_BUFFER);
		3821	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[c],decimals,double_data[1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3822	add_to_buffer(tmp_buffer);
		3823	/* object_cnt++; */
		3824	if(onclick != 0){object_cnt++;}
		3825	}
		3826	reset();
		3827	dragstuff[4] = 1;
		3828	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3829	break;
		3830	case RECT:
		3831	/*
		3832	@ rect x1,y1,x2,y2,color
		3833	@ use command <code>frect x1,y1,x2,y2,color</code> for a filled rectangle
		3834	@ use command/keyword <a href='#filled'>filled</a> before command <code>rect x1,y1,x2,y2,color</code>
		3835	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
18572	bpr	3836	@ note: internally a rect is defined with 4 points. So when performing some affine transformation, other than translation, it will result in some morphing of the rectangle !<br>this is a deviation of flydraw's rect&affine
18552	bpr	3837	@%rect%size 400,400%xrange -10,10%yrange -10,10%rect 0,0,4,-4,green%rect 0,5,4,1,red
		3838	*/
		3839	for(i=0;i<5;i++){
		3840	switch(i){
		3841	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		3842	case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		3843	case 2:double_data[4] = get_real(infile,0);break; /* x-values */
		3844	case 3:double_data[5] = get_real(infile,0);break; /* y-values */
		3845	case 4:stroke_color = get_color(infile,1);/* name or hex color */
		3846	decimals = find_number_of_digits(precision);
		3847	double_data[2] = double_data[4];
		3848	double_data[3] = double_data[1];
		3849	double_data[6] = double_data[0];
		3850	double_data[7] = double_data[5];
		3851	/* using closed PATH (type=5) instead of ctx.rect (type=1)!!!
		3852	0,1 2,3
		3853	6,7 4,5
		3854	x = [0,2,4,6]
		3855	y = [1,3,5,7]
		3856	*/
		3857	if(use_rotate == TRUE ){rotate(8,angle,rotationcenter,2);}
		3858	if(use_affine == TRUE ){ transform(8,2);}
		3859	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	3860	tmp_buffer=my_newmem(MAX_BUFFER);
		3861	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.f,%.f,%.f,%.f],[%.f,%.f,%.f,%.f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[6],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],decimals,double_data[7],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3862	add_to_buffer(tmp_buffer);
		3863	if(onclick != 0){object_cnt++;}
18555	bpr	3864	/* object_cnt++; */
18552	bpr	3865	reset();
		3866	break;
		3867	}
		3868	}
		3869	dragstuff[5] = 1;
		3870	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3871	break;
		3872	case RECTS:
		3873	/*
		3874	@ rects color,x1,y1,x2,y2,.....
		3875	@ use command <code>frect color,x1,y1,x2,y2,.....</code> for a filled rectangle
		3876	@ use command/keyword <a href='#filled'>filled</a> before command <code>rects color,x1,y1,x2,y2,....</code>
		3877	@ use command <code>fillcolor color</code> before ''frects`` to set the fill colour.
		3878	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		3879	@%rects%size 400,400%xrange -10,10%yrange -10,10%rects red,0,0,4,-4,0,5,4,1
		3880	*/
		3881	/* using closed PATH (type=5) in stead of ctx.rect (type=1)!!!
		3882	0,1 2,3 .....8,9 10,11.....
		3883	6,7 4,5 .....14,15 12,13.....
		3884	x = [0,2,4,6,8,10,12,14...]
		3885	y = [1,3,5,7,9,11,13,15...]
		3886	*/
		3887	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		3888	fill_color = stroke_color;
		3889	i=0;
		3890	while( ! done ){ /* get next item until EOL*/
		3891	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3892	if(i%2 == 0 ){
		3893	double_data[i] = get_real(infile,0); /* x */
		3894	}
		3895	else {
		3896	double_data[i] = get_real(infile,1); /* y */
		3897	}
		3898	i++;
		3899	}
		3900	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3901	if(use_affine == TRUE ){ transform(i-1,2);}
		3902	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
11806	schaersvoo	3903
18552	bpr	3904	decimals = find_number_of_digits(precision);
		3905	for(c = 0 ; c < i-1 ; c = c+4){
18557	bpr	3906	tmp_buffer=my_newmem(MAX_BUFFER);
		3907	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.f,%.f,%.f,%.f],[%.f,%.f,%.f,%.f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+2],decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+1],decimals,double_data[c+3],decimals,double_data[c+3],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3908	add_to_buffer(tmp_buffer);
		3909	if(onclick != 0){object_cnt++;}
		3910	/* object_cnt++; */
		3911	}
		3912	dragstuff[5] = 1;
		3913	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3914	if(use_rotate == TRUE ){
		3915	rotate(i-1,angle,rotationcenter,2);
		3916	}
		3917	reset();
		3918	break;
		3919	case REPLYFORMAT:
		3920	/*
		3921	@ replyformat number
		3922	@ use number=-1 to deactivate the js-functions read_canvas() and read_dragdrop()
		3923	@ default values should be fine !
		3924	@ use command <code>precision [0,1,10,100,1000,10000...]</code> before command ''replyformat`` to set the desired number of decimals in the student reply / drawing
		3925	@ the last value for ''precision int`` will be used to calculate the reply coordinates, if needed (read_canvas();)
		3926	@ choose<ul><li>replyformat 1: <code>x1,x2,x3,x4....x_n<br>y1,y2,y3,y4....y_n</code> x/y in pixels</li><li>replyformat 2: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 3: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n<br> r1,r2,r3,r4....r_n</code> x/y in pixels, r in pixels</li><li>replyformat 4: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n<br> r1,r2,r3,r4....r_n</code> x/y in xrange / yrange coordinate system, r in pixels</li><li>replyformat 5: <code> Ax1,Ax2,Ax3,Ax4....Ax_n<br> Ay1,Ay2,Ay3,Ay4....Ay_n<br> Bx1,Bx2,Bx3,Bx4....Bx_n<br> By1,By2,By3,By4....By_n<br> Cx1,Cx2,Cx3,Cx4....Cx_n<br> Cy1,Cy2,Cy3,Cy4....Cy_n<br> ....<br> Zx1,Zx2,Zx3,Zx4....Zx_n<br> Zy1,Zy2,Zy3,Zy4....Zy_n</code> x/y in pixels</li><li>replyformat 6: <code> Ax1,Ax2,Ax3,Ax4....Ax_n<br> Ay1,Ay2,Ay3,Ay4....Ay_n<br> Bx1,Bx2,Bx3,Bx4....Bx_n<br> By1,By2,By3,By4....By_n<br> Cx1,Cx2,Cx3,Cx4....Cx_n<br> Cy1,Cy2,Cy3,Cy4....Cy_n<br> ....<br> Zx1,Zx2,Zx3,Zx4....Zx_n<br> Zy1,Zy2,Zy3,Zy4....Zy_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 7: <code> x1:y1,x2:y2,x3:y3,x4:y4...x_n:y_n</code> x/y in pixels</li><li>replyformat 8: <code> x1:y1,x2:y2,x3:y3,x4:y4...x_n:y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 9: <code> x1:y1:r1,x2:y2:r2,x3:y3:r3,x4:y4:r3...x_n:y_n:r_n</code> x/y in pixels</li><li>replyformat 10: <code> x1:y1:r1,x2:y2:r2,x3:y3:r3,x4:y4:r3...x_n:y_n:r_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 11: <code> Ax1,Ay1,Ax2,Ay2<br>Bx1,By1,Bx2,By2<br> Cx1,Cy1,Cx2,Cy2<br> Dx1,Dy1,Dx2,Dy2<br> ......<br> Zx1,Zy1,Zx2,Zy2</code> x/y in xrange / yrange coordinate system</li><li>replyformat 12: <code> Ax1,Ay1,Ax2,Ay2<br> Bx1,By1,Bx2,By2<br>Cx1,Cy1,Cx2,Cy2<br> Dx1,Dy1,Dx2,Dy2<br> ......<br> Zx1,Zy1,Zx2,Zy2</code> x/y in pixels</li><li>replyformat 13: <code> Ax1:Ay1:Ax2:Ay2,Bx1:By1:Bx2:By2,Cx1:Cy1:Cx2:Cy2,Dx1:Dy1:Dx2:Dy2, ... ,Zx1:Zy1:Zx2:Zy2</code> x/y in xrange / yrange coordinate system</li><li>replyformat 14: <code> Ax1:Ay1:Ax2:Ay2,Bx1:By1:Bx2:By2....Zx1:Zy1:Zx2:Zy2</code> x/y in pixels</li><li>replyformat 15: reply from inputfields,textareas <code>reply1,reply2,reply3,...,reply_n</code></li><li>replyformat 16: mathml input fields</li><li>replyformat 17: read ''userdraw text,color`` only <code>x1,y1,text1 \\n x2,y2,text2...\\n...x_n,y_n,text_n </code> x/y-values are in xrange/yrange</li><li>replyformat 18: read_canvas() will read all interactive clocks in <code>H1:M1:S1,H2:M2:S2...Hn:Mn:Sn</code></li><li>replyformat 19: read_canvas() will return the object number of marked / clicked object (clock), analogue to (shape library) onclick command</li><li>replyformat 20: read_canvas() will reply "object_number:x:y" of external images: object_number of the first draggable external image in the fly-script starts with 0, e.g. expect something like 0:-5:4,1:6:2,2:-2:-5, the first image position is (-5:4), the second image position is (6:2) and the third image position is (-2:-5) <li>replyformat 21: <code> (x1:y1) (x2:y2) ... (x_n:y_n)</code> verbatim coordinate return</li><li>replyformat 22: returns an array .... <code>reply[0]=x1 reply[1]=y1 reply[2]=x2 reply[3]=y2 ... reply[n-1]=x_n reply[n]=y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 23: can only be used for drawtype ''polyline``. A typical click sequence in drawtype polyline is x1,y1,x2,y2,x2,y2,x3,y3,x3,y3.....,x(n-1),y(n-1),x(n-1),y(n-1),xn,yn --replyformat 23 gives <code>x1,y1,x2,y2,x3,y3,.....x(n-1),y(n-1),xn,yn</code>; multiple occurences will be filtered out. The reply will be in x-y-range (xreply \\n yreply)</li><li>replyformat 24: read all inputfield values: even those set ''readonly``</li><li>replyformat 25: <code> angle1,angle2;...;angle_n</code> will return the radius (one or many) of the user drawn circle segment in degrees</li><li>replyformat 26: <code> rad1,rad2,...rad_n</code> will return the radius (one or many) of the user drawn circle segment in radians</li><li>replyformat 27: return (only) userdraw inputfields <code>x1,y1,text1<br> x2,y2,text2...<br>...x_n,y_n,textn</code></li><li>replyformat 28: <code> x1,y1,r1,x2,y2,r2...x_n,y_n,r_n</code> x / y / r in xrange / yrange coordinate system: may be used to reinput into command <code>circles color,x1,y1,r1,x2,y2,r2...x_n,y_n,r_n</code> will not return anything else (e.g. no inputfields, text etc)</li><li>replyformat 34: a special for OEF and dragging external images -included via commands <a href='#copy'>copy</a> or <a href='#copyresized'>copyresized</a> there will be an extra function <code>read_canvas_images()</code> for reading the coordinates of the images.<br>for now this is a unique function, e.g. there is no ''canvas id`` linked to it. (TO DO !!! 18/5/2019)</li></ul>
		3927	@ special replyformat = 100 ; will access to the raw javascript object data...use: read_dragdrop([property,property,...])<br>for example properies like 'clicked','text', 'angle' , 'x'
		3928	*/
		3929	reply_format = (int) get_real(infile,1);
		3930	reply_precision = precision;
		3931	break;
		3932	case ROUNDRECT:
		3933	/*
		3934	@ roundrect x1,y1,x2,y2,radius in px,color
		3935	@ use command <code>froundrect x1,y1,x2,y2,radius,color</code> for a filled rectangle
		3936	@ use command/keyword <a href='#filled'>filled</a> before command <code>roundrect x1,y1,x2,y2,radius,color</code>
		3937	@ fillcolor will be identical to ''color``
		3938	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		3939	@%roundrect%size 400,400%xrange -10,10%yrange -10,10%roundrect 0,0,4,-4,20,green%roundrect 0,5,4,1,10,red
		3940	*/
		3941	for(i=0;i<6;i++){
		3942	switch(i){
		3943	case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		3944	case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		3945	case 2:double_data[2] = get_real(infile,0);break; /* x-values */
		3946	case 3:double_data[3] = get_real(infile,0);break; /* y-values */
		3947	case 4:int_data[0] = (int) (get_real(infile,0));break; /* radius value in pixels */
		3948	case 5:stroke_color = get_color(infile,1);/* name or hex color */
		3949	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		3950	if(use_affine == TRUE ){ transform(2,4);}
		3951	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3952	/* ensure no inverted roundrect is produced... */
		3953	if( double_data[0] > double_data[2] ){double_data[4] = double_data[0];double_data[0] = double_data[2];double_data[2] = double_data[4];}
		3954	if( double_data[3] > double_data[1] ){double_data[4] = double_data[1];double_data[1] = double_data[3];double_data[3] = double_data[4];}
		3955	decimals = find_number_of_digits(precision);
18557	bpr	3956	tmp_buffer=my_newmem(MAX_BUFFER);
		3957	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	3958	add_to_buffer(tmp_buffer);
		3959	if(onclick != 0){object_cnt++;}
		3960	/* object_cnt++;*/
		3961	reset();
		3962	break;
		3963	}
		3964	}
		3965	dragstuff[6] = 1;
		3966	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		3967	break;
		3968	case ROUNDRECTS:
		3969	/*
		3970	@ roundrects color,radius in px,x1,y1,x2,y2,x3,y3,x4,y4,....
		3971	@ for filled roundrects use command/keyword <a href='#filled'>filled</a> before command
		3972	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		3973	@%roundrects%size 400,400%xrange -10,10%yrange -10,10%roundrects blue,5,0,0,4,-4,5,4,1,2
		3974	*/
11806	schaersvoo	3975
18552	bpr	3976	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		3977	int_data[0] = (int) (get_real(infile,0)); /* radius value in pixels */
		3978	fill_color = stroke_color;
		3979	i=0;
		3980	while( ! done ){ /* get next item until EOL*/
		3981	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		3982	if(i%2 == 0 ){
		3983	double_data[i] = get_real(infile,0); /* x */
		3984	}
		3985	else {
		3986	double_data[i] = get_real(infile,1); /* y */
		3987	}
		3988	i++;
		3989	}
		3990	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		3991	if(use_affine == TRUE ){ transform(i-1,2);}
		3992	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		3993	decimals = find_number_of_digits(precision);
		3994	for(c = 0 ; c < i-1 ; c = c+4){
		3995	/* ensure no inverted roundrect is produced... */
		3996	if( double_data[c] > double_data[c+2] ){double_data[c+4] = double_data[c];double_data[c] = double_data[c+2];double_data[c+2] = double_data[c+4];}
		3997	if( double_data[c+3] > double_data[c+1] ){double_data[c+4] = double_data[c+1];double_data[c+1] = double_data[c+3];double_data[c+3] = double_data[c+4];}
18557	bpr	3998	tmp_buffer=my_newmem(MAX_BUFFER);
		3999	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.f,%.f],[%.f,%.f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4000	add_to_buffer(tmp_buffer);
		4001	if(onclick != 0){object_cnt++;}
		4002	/* object_cnt++; */
		4003	}
		4004	dragstuff[6] = 1;
		4005	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4006	reset();
		4007	break;
		4008	case RULER:
		4009	/*
		4010	@ ruler x,y,x-width,y-height,mode
		4011	@ x,y are the initial location
		4012	@ x-width, y-height are the ruler dimensions width & height in xy-coordinate system
		4013	@ the ruler scale is by definition the x-scale, set by command ''xrange``. For example: a ruler x-width of 6 will have a scale ranging from 0 to 6
		4014	@ mode: use -1 to set the ruler interactive (eg mouse movement of ruler; drag & rotate)<br>use mode = '0° - 360°' to set the ruler with a static angle of some value
		4015	@ if combined with a protractor, use replyformat = 32
		4016	@ only one ruler allowed (for the time being)
		4017	@ when using command ''zoom``, pay <b>attention</b> to the size and symmetry of your canvas to avoid a partial image, locate the start position near the center of the visual canvas; technical: the actual ''ruler`` is just a static generated image in a new canvas-memory. This image is only generated once, and a copy of its bitmap is translated & rotated onto the visible canvas. That is the reason for the ''high-speed dragging and rotating``. I have limited its size to xsize × ysize e.g. the same size as the visual canvas...
		4018	@ usage: first left click on the ruler will activate dragging; a second left click will activate rotating (just move mouse around), a third click will freeze this position and the x/y-coordinate and angle in radians will be stored in reply(3), a next click will restart this sequence...
		4019	@%ruler_interactive%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler -9,0,10,2,-1%display degree,blue,22
		4020	@%ruler_set_degree_45%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler 0,0,10,2,45
		4021	@%ruler_set_degree_125%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler 0,0,10,2,125
		4022	*/
		4023	for( i = 0;i < 5; i++ ){
		4024	switch(i){
		4025	case 0: double_data[0] = get_real(infile,0);break; /* x-center */
		4026	case 1: double_data[1] = get_real(infile,0);break; /* y-center */
		4027	case 2: double_data[2] = get_real(infile,0);break; /* x-width */
		4028	case 3: double_data[3] = get_real(infile,0);break; /* y-width */
		4029	case 4: int_data[0] = (int)(get_real(infile,1)); /* passive mode */
		4030	decimals = find_number_of_digits(precision);
		4031	if( int_data[0] < 0 ){
		4032	js_function[JS_FIND_ANGLE] = 1;
		4033	}
18557	bpr	4034	add_js_ruler(double_data[0],double_data[1],double_data[2],double_data[3], font_family,stroke_color,stroke_opacity,fill_color,fill_opacity,line_width,int_data[0],use_snap);
		4035	tmp_buffer=my_newmem(MAX_BUFFER);
		4036	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, ";ruler%d(); ",canvas_root_id));
18552	bpr	4037	add_to_buffer(tmp_buffer);
		4038	reply_precision = precision;
		4039	/* no reply from ruler if non-interactive */
		4040	if( reply_format == 0 && int_data[0] == -1 ){reply_format = 31;}
		4041	break;
		4042	default: break;
		4043	}
		4044	}
		4045	break;
		4046	case RESET:
		4047	/*
		4048	@ reset
		4049	@ keyword
		4050	@ disables the effects of the <a href="noreset">noreset</a> command
		4051	@ so the next objects will not be <a href="#filled">filled</a> and <a href="#dashed">dashed</a>
		4052	*/
		4053	no_reset = FALSE; reset();
		4054	break;
		4055	case RESETOFFSET:
		4056	/*
18556	bpr	4057	@ resetoffset
		4058	@ keyword ; use to restore text placement on the canvas to the real (x;y) coordinates of the left bottom corner of the text
		4059	@ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-librariy
18552	bpr	4060	*/
		4061	use_offset = 0;
		4062	break;
		4063	case ROTATE:
		4064	/*
18556	bpr	4065	@ rotate rotation_angle
		4066	@ angle in degrees
		4067	@ (only) the next object will be rotated is given angle
		4068	@ positive values rotate counter clockwise
		4069	@ attention: all objects will be rotated around their first point...<br><code>rotate 45<br>triangle 1,1,5,1,3,4,red</code><br>will rotate 45 degrees around point (1:1)
		4070	@ if another rotation center is needed, use command <a href="#rotationcenter">rotationcenter xc,yc</a>.<br>to reset this rotationcenter, use keyword <a href="#killrotate">killrotate</a>
		4071	@ attention: rotate will mess up the interactivity of the rotated object <br>e.g. if combined with command <a href="#drag">drag xy</a> or keyword <a href="#onclick">onclick</a>: the mouse recognises the original -unrotated- coordinates of the object
		4072	@%rotate_1%size 400,400%xrange -10,10%yrange -10,10%fpoly yellow,0,0,4,3,2,5%rotate 45%fpoly violet,0,0,4,3,2,5%killrotate%rotate 90%fpoly violet,0,0,4,3,2,5%
18552	bpr	4073	*/
		4074	use_rotate = TRUE;
		4075	angle = -1(get_real(infile,1));/ -1: to be compatible with Flydraw... */
		4076	break;
		4077	case ROTATION_CENTER:
		4078	/*
		4079	@ rotationcenter x_center,y_center
		4080	@ define an rotation center in your x/y-coordinate system
		4081	@ wims will not check the validity of your input; use javascript console to debug any erors
		4082	@ if not defined a rotation will be around the first point of an object
		4083	@ to be used before command <a href="#rotate">rotate</a>
18572	bpr	4084	@ use <a href="#killrotate">killrotate</a> to reset to 'null' <br>(eg. the rotationcenter of the next object(s) will be the first (x;y) coordinate of the object(s))
18552	bpr	4085	@ all other commands will use this rotation center, unless a <a href="#killrotation">killrotation</a> is given
		4086	@%rotationcenter%size 400,400%xrange -5,10%yrange -5,10%circles green,3,3,4.25%rotationcenter 3,3%opacity 255,80%fpoly yellow,0,0,4,3,2,5%rotate 45%fpoly violet,0,0,4,3,2,5%rotate 90%fpoly lightblue,0,0,4,3,2,5%rotate 135%fpoly blue,0,0,4,3,2,5%rotate 180%fpoly orange,0,0,4,3,2,5%rotate 225%fpoly green,0,0,4,3,2,5%rotate 270%fpoly cyan,0,0,4,3,2,5%rotate 315%fpoly purple,0,0,4,3,2,5%linewidth 3%point 3,3,red%mouse red,22
		4087	@%rotationcenter_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%fillcolor black%strokecolor yellow%rotationcenter 0,0%fontsize 28%slider 0,2pi,400,30,angle degrees active, rotate...%plot red,5sin(x)%filled%linewidth 1%opacity 150,50%fillcolor orange%angle 0,0,pi,0,0,blue
		4088	*/
		4089	for( i = 0;i < 2; i++ ){
		4090	switch(i){
		4091	case 0: rotationcenter[0] = get_real(infile,0);break; /* x-center */
		4092	case 1: rotationcenter[1] = get_real(infile,1);break; /* y-center */
		4093	}
		4094	string_length = 1 + snprintf(NULL,0,"[%f,%f ]",rotationcenter[0],rotationcenter[1]);
18557	bpr	4095
18552	bpr	4096	rotation_center = my_newmem(string_length);
		4097	snprintf(rotation_center,string_length,"[%f,%f]",rotationcenter[0],rotationcenter[1]);
		4098	}
		4099	break;
		4100	case SIZE:
		4101	/*
18556	bpr	4102	@ size width,height
		4103	@ set canvas size in pixels
		4104	@ mandatory first command (can only be preceded by keyword <a href="#popup">popup</a>)
		4105	@ if xrange and/or yrange is not given the range will be set to pixels:<br>xrange 0,xsize yrange 0,ysize<br>note: lower left corner is origin (0:0) !!! this in contrast to flydraw
18552	bpr	4106	*/
		4107	found_size_command = 1;
		4108	/* using fabs: however "xsize == int": so "xsize = abs( (int) get_real(infile,0))" would be the idea... */
		4109	xsize = (int)(fabs(round(get_real(infile,0)))); /* just to be sure that sizes > 0 */
		4110	ysize = (int)(fabs(round(get_real(infile,1))));
		4111	/* sometimes we want xrange / yrange to be in pixels...without telling x/y-range */
		4112	xmin = 0;xmax = xsize;
		4113	ymin = 0;ymax = ysize;
11806	schaersvoo	4114
		4115	/*
		4116	The sequence in which stuff is finally printed is important !!
		4117	*/
18552	bpr	4118	fprintf(stdout,"\n\
		4119	<script>\n\
		4120	/<![CDATA[/\n\
		4121	if( typeof(wims_status) === 'undefined' ){ var wims_status = \"$status\";};\
		4122	if( typeof(use_dragdrop_reply) === 'undefined' ){ var use_dragdrop_reply = false;};\
		4123	if( typeof(canvas_scripts) === 'undefined' ){ var canvas_scripts = new Array();};\
		4124	canvas_scripts.push(\"%d\");\n/]]>/\n</script>\n\
		4125	",canvas_root_id);
11806	schaersvoo	4126
18552	bpr	4127	/* style=\"display:block;position:relative;margin-left:auto;margin-right:auto;margin-bottom:4px;\" */
		4128	if( use_tooltip != 2){
		4129	fprintf(stdout,"<!-- canvasdraw div -->\n\
		4130	<div tabindex=\"0\" id=\"canvas_div%d\" style=\"max-width:%dpx;width:%dpx;height:%dpx\" class=\"canvas_wrapper\" oncontextmenu=\"return false;\">\
		4131	<canvas class=\"canvas_placeholder\" width=\"%d\" height=\"%d\"></canvas>\
		4132	</div>\n\
		4133	<!-- tooltip and input placeholder -->\n\
		4134	<div id=\"tooltip_placeholder_div%d\" style=\"text-align:center\">\
		4135	<span id=\"tooltip_placeholder%d\" class=\"tooltip_placeholder\"></span></div>\
		4136	<!-- include actual object code via include file -->\n\
		4137	<script id=\"canvas_script%d\" src=\"%s\" defer></script>\n",canvas_root_id,xsize,xsize,ysize,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,getfile_cmd);
		4138	} else {
11806	schaersvoo	4139	/*
14066	bpr	4140	set canvas_div invisible and do not include placeholder in main html page:
15111	schaersvoo	4141	the js-include will also be in a popup window...to be shown when wims $status = done
11806	schaersvoo	4142	*/
18552	bpr	4143	fprintf(stdout,"<!-- canvasdraw div invisible -->\n\
		4144	<div tabindex=\"0\" id=\"canvas_div%d\" class=\"canvas_wrapper\" style=\"display:none;max-width:%dpx;width:%dpx;height:%dpx;\">\
		4145	<canvas class=\"canvas_placeholder\" width=\"%d\" height=\"%d\"></canvas>\
		4146	</div>\n\
		4147	<div id=\"tooltip_placeholder_div%d\" style=\"display:none;position:relative;margin-left:auto;margin-right:auto;margin-bottom:4px;\">\
		4148	<span id=\"tooltip_placeholder%d\" class=\"tooltip_placeholder\"></span></div>\
		4149	<!-- include actual object code via include file -->\n\
		4150	<script id=\"canvas_script%d\" src=\"%s\"></script>\n",canvas_root_id,xsize,xsize,ysize,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,getfile_cmd);
		4151	}
11806	schaersvoo	4152
14071	bpr	4153	/* these must be global...it is all really very poor javascript:( */
15734	schaersvoo	4154	fprintf(js_include_file,"\n/* begin generated javascript include for canvasdraw version %s */\n\
11806	schaersvoo	4155	\"use strict\";\n\
15111	schaersvoo	4156	/* these variables and functions must be global */\
11806	schaersvoo	4157	var read_dragdrop%d;\
14038	schaersvoo	4158	var read_canvas_images;\
11806	schaersvoo	4159	var read_canvas%d;\
		4160	var set_clock;\
		4161	var clear_draw_area%d;\
		4162	var update_draw_area%d;\
14038	schaersvoo	4163	var place_image_on_canvas;\
11806	schaersvoo	4164	var draw_boxplot;\
		4165	var redraw_all%d;\
15111	schaersvoo	4166	var userdraw_primitive;\
		4167	var wims_canvas_function%d = function(){\n/* common used stuff */\
		4168	var userdraw_x = [];var userdraw_y = [];var userdraw_radius = [];\
11806	schaersvoo	4169	var xsize = %d;\
		4170	var ysize = %d;\
		4171	var precision = 100;\
		4172	var canvas_div = document.getElementById(\"canvas_div%d\");\
		4173	var create_canvas%d = function(canvas_type,size_x,size_y){var cnv;if(document.getElementById(\"wims_canvas%d\"+canvas_type)){ cnv = document.getElementById(\"wims_canvas%d\"+canvas_type);}else{try{ cnv = document.createElement(\"canvas\"); }catch(e){alert(\"Your browser does not support HTML5 CANVAS:GET FIREFOX !\");return;};canvas_div.appendChild(cnv);};cnv.width = size_x;cnv.height = size_y;cnv.style.top = 0;cnv.style.left = 0;cnv.style.position = \"absolute\";cnv.id = \"wims_canvas%d\"+canvas_type;return cnv;};\
		4174	function findPosX(i){ var obj = i;var curleft = 0;if(obj.offsetParent){while(1){curleft += obj.offsetLeft;if(!obj.offsetParent){break;};obj = obj.offsetParent;};}else{if(obj.x){curleft += obj.x;};};return curleft;};function findPosY(i){var obj = i;var curtop = 0;if(obj.offsetParent){while(1){curtop += obj.offsetTop;if(!obj.offsetParent){break;};obj = obj.offsetParent;};}else{if(obj.y){curtop += obj.y;};};return curtop;};\
18606	bpr	4175	function x2px(x){if(use_xlogscale == 0 ){let res=Math.trunc((x-xmin)/(xmax - xmin)xsize);return (res==xsize)?xsize-1:res;}else{let x_max = Math.log(xmax)/Math.log(xlogbase);let x_min = Math.log(xmin)/Math.log(xlogbase);let x_in = Math.log(x)/Math.log(xlogbase);let res=(x_in-x_min)/(x_max - x_min)xsize; return (res==xsize)?xsize-1:res;};};\
		4176	function px2x(px){if(use_xlogscale == 0 ){return px(xmax - xmin)/xsize + xmin;}else{let x_max = Math.log(xmax)/Math.log(xlogbase);let x_min = Math.log(xmin)/Math.log(xlogbase);let x_out = x_min +px(x_max - x_min)/xsize;return Math.pow(xlogbase,x_out);};};\
		4177	function px2y(py){if(use_ylogscale == 0 ){return ymax - py(ymax - ymin)/ysize;}else{let y_max = Math.log(ymax)/Math.log(ylogbase);let y_min = Math.log(ymin)/Math.log(ylogbase);let y_out = y_max +py(y_min - y_max)/ysize;return Math.pow(ylogbase,y_out);};};\
		4178	function y2px(y){if(use_ylogscale == 0){let res= Math.trunc((ymax-y)/(ymax - ymin)ysize);return (res==ysize)?ysize-1:res;}else{var y_max = Math.log(ymax)/Math.log(ylogbase);var y_min = Math.log(ymin)/Math.log(ylogbase);var y_in = Math.log(y)/Math.log(ylogbase);return (y_max - y_in)ysize/(y_max - y_min);};};\
11806	schaersvoo	4179	function scale_x_radius(rx){return rx*xsize/(xmax - xmin);};\
		4180	function scale_y_radius(ry){return ry*ysize/(ymax - ymin);};\
		4181	function distance(x1,y1,x2,y2){return Math.sqrt( (x1-x2)(x1-x2) + (y1-y2)(y1-y2) );};\
		4182	function distance_to_line (r,q,x,y){var c = (y) - (-1/r)(x);var xs = r(c - q)/(rr+1);var ys = (r)(xs)+(q);return parseInt(Math.sqrt( (xs-x)(xs-x) + (ys-y)(ys-y) ));};\
		4183	function move(obj,dx,dy){for(var p = 0 ; p < obj.x.length; p++){obj.x[p] = obj.x[p] + dx;obj.y[p] = obj.y[p] + dy;};return obj;};\
15111	schaersvoo	4184	var snap_x = 1;var snap_y = 1;\
11806	schaersvoo	4185	function snap_to_x(x){return x2px(snap_x*(Math.round((px2x(x))/snap_x)));};\
11890	schaersvoo	4186	function snap_to_y(y){return y2px(snap_y*(Math.round((px2y(y))/snap_y)));};\
15111	schaersvoo	4187	function multisnap_check(x,y,snap){switch(snap){case 1:return [snap_to_x(x),snap_to_y(y)];break;case 2:return [snap_to_x(x),y];break;case 3:return [x,snap_to_y(y)];break;case 4:return snap_to_points(x,y);break;case 5: return snap_to_fun(x,y);break;default: return [x,y];break;};};\
11806	schaersvoo	4188	var xlogbase = 10;\
		4189	var ylogbase = 10;\
		4190	var use_xlogscale = 0;\
		4191	var use_ylogscale = 0;\
11891	schaersvoo	4192	var x_strings = {};var x_strings_up = [];\
11806	schaersvoo	4193	var y_strings = null;\
		4194	var use_jsmath = 0;\
		4195	var xstart = 0;\
		4196	var ystart = 0;\
		4197	var unit_x=\" \";\
		4198	var unit_y=\" \";\
15111	schaersvoo	4199	var dragdrop_reply = [];\
15734	schaersvoo	4200	var external_canvas = create_canvas%d(%d,xsize,ysize);",VERSION,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,EXTERNAL_IMAGE_CANVAS);
15111	schaersvoo	4201	/* var xstart,ystart are normally 0 : in case of sgraph they have the 'jump' in the graph */
18552	bpr	4202	break;
		4203	case SEGMENT:
		4204	/*
		4205	@ segment x1,y1,x2,y2,color
		4206	@ alternative: seg
		4207	@ draw a line segment between points (x1:y1)--(x2:y2) in color ''color``
		4208	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		4209	@%segment_onclick%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%segment 1,1,-9,3,green
		4210	@%segment_drag_y%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag y%segment 1,1,-9,3,green
		4211	*/
		4212	for(i=0;i<5;i++) {
		4213	switch(i){
		4214	case 0: double_data[0]= get_real(infile,0);break; /* x1-values */
		4215	case 1: double_data[1]= get_real(infile,0);break; /* y1-values */
		4216	case 2: double_data[2]= get_real(infile,0);break; /* x2-values */
		4217	case 3: double_data[3]= get_real(infile,0);break; /* y2-values */
		4218	case 4: stroke_color=get_color(infile,1);/* name or hex color */
		4219	if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		4220	if(use_affine == TRUE ){ transform(4,2);}
		4221	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		4222	decimals = find_number_of_digits(precision);
18557	bpr	4223	tmp_buffer=my_newmem(MAX_BUFFER);
		4224	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4225	add_to_buffer(tmp_buffer);
		4226	if(onclick != 0){object_cnt++;}
		4227	/* object_cnt++; */
		4228	reset();
		4229	break;
		4230	default: break;
		4231	}
		4232	}
		4233	dragstuff[4] = 1;
		4234	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4235	break;
		4236	case SEGMENTS:
		4237	/*
		4238	@ segments color,x1,y1,x2,y2,...,x_n,y_n
		4239	@ alternative: segs
		4240	@ draw multiple segments between points (x1:y1)--(x2:y2).....and... (x_n-1:y_n-1)--(x_n:y_n) in color ''color``
		4241	@ use command ''linewidth int`` to adjust size
		4242	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		4243	@%segments_onclick%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
		4244	@%segments_drag_y%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag y%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
		4245	*/
		4246	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		4247	fill_color = stroke_color;
		4248	i=0;
		4249	while( ! done ){ /* get next item until EOL*/
		4250	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		4251	if(i%2 == 0 ){
		4252	double_data[i] = get_real(infile,0); /* x */
		4253	}
		4254	else {
		4255	double_data[i] = get_real(infile,1); /* y */
		4256	}
		4257	i++;
		4258	}
		4259	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		4260	if(use_affine == TRUE ){ transform(i-1,2);}
		4261	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		4262	decimals = find_number_of_digits(precision);
		4263	for(c = 0 ; c < i-1 ; c = c+4){
18557	bpr	4264	tmp_buffer=my_newmem(MAX_BUFFER);
		4265	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4266	add_to_buffer(tmp_buffer);
		4267	if(onclick != 0){object_cnt++;}
		4268	/* object_cnt++;*/
		4269	}
		4270	reset();
		4271	dragstuff[4] = 1;
		4272	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4273	break;
		4274	case SETLIMITS:
		4275	/*
18556	bpr	4276	@ setlimits
		4277	@ keyword: if set, it will produce 4 inputfields for ''xmin,xmax,ymin,ymax`` and an ''ok`` button
		4278	@ may be used for inputfield based zooming / panning
		4279	@ may be styled using command <a href="#css">css</a>
		4280	@ use commands <a href="#xlabel">xlabel / ylabel</a> to change text from xmin to ''xlabel`` etc
		4281	@ note: the input value will not be checked on validity
		4282	@%setlimits%size 400,400%xrange -10,10%yrange -10,10%precision 1%xlabel T%ylabel H%axis%axisnumbering%grid 2,2,grey,2,2,5,grey%precision 100%multistrokecolors red,green,blue,orange%multilinewidth 1,1,2,2%multistrokeopacity 0.6,0.7,0.8,0.9%jsplot red,1/x,-1,x,1/(x-3),1/(x+3)%setlimits
18552	bpr	4283	*/
		4284	js_function[JS_SAFE_EVAL] = 1;
		4285	js_function[JSPLOT_AND_ZOOM] = 1;
		4286	add_setlimits(font_size,css_class);
		4287	done = TRUE;
		4288	break;
		4289	case SETPIXEL:
		4290	/*
		4291	@ setpixel x,y,color
		4292	@ A rectangular "point" with diameter 1 pixel centered at (x:y) in xrange / yrange
		4293	@ pixels can <b>not</b> be dragged or clicked
		4294	@ "pixelsize = 1" may be changed by command <code>pixelsize int</code>
		4295	@%setpixel%size 400,400%xrange -10,10%yrange -10,10%setpixel 1,1,red%pixelsize 2%setpixel 2,2,green%pixelsize 3%setpixel 3,3,blue%
		4296	*/
		4297	js_function[DRAW_PIXELS] = 1;
		4298	for(i=0;i<3;i++){
		4299	switch(i){
		4300	case 0: double_data[0] = get_real(infile,0); break; /* x */
		4301	case 1: double_data[1] = get_real(infile,0); break; /* y */
		4302	case 2: stroke_color = get_color(infile,1);
18557	bpr	4303	tmp_buffer=my_newmem(MAX_BUFFER);
		4304	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_setpixel([%f],[%f],\"%s\",%.2f,%d);\n",double_data[0],double_data[1],stroke_color,stroke_opacity,pixelsize));
18552	bpr	4305	add_to_buffer(tmp_buffer);
		4306	break;
		4307	default:break;
		4308	}
		4309	}
		4310	reset();
		4311	break;
		4312	case SLIDER:
		4313	/*
		4314	@ slider start_value,end_value,width px,height px,type,label
		4315	@ type may be: ''x,y,angle``
		4316	@ if a slider value display is desired, use for argument ''type``: ''x display``, ''y display``, ''angle radian``, ''angle degree``
		4317	@ is the slider is used for animation, add keyword ''anim`` or ''animate`` to ''type``; for now only one animated slider may be used...
18572	bpr	4318	@ default behaviour is: click on an object to use its slider(s)<br>to use sliders without clicking on an object, use for ''type`` keyword ''active``<br>eg: <code>slider -2pi,2pi,300,30,angle degree active,Rotate</code>
18552	bpr	4319	@ if a unit (or something like that...) for x/y-value display is needed, use commands ''xunit`` and / or ''yunit``
		4320	@ if the translation should be performed using a function, use for type: ''x function``, ''y function``<br>use commands ''sliderfunction_x`` and/or ''sliderfunction_y`` before the slider command to define the functions. Example:<code>sliderfunction_x x^2<br>sliderfunction_y y^2<br>slider -5,5,100,100,xy function,Some_Text<br>...some stuff to slide<br>killslider<br>sliderfunction_x x^2-2<br>slider -15,15,100,10,x function,Some_Other_Text<br>...more stuff to slide<br>killslider... etc</code>
		4321	@ use command ''slider`` before draggable/clickable objects.
		4322	@ drag and drop may be combined with rotation slider<br>for example an arrow rotated by a slider may be placed anywhere (drag&drop)<br><code>size 300,300<br>xrange -5,5<br>yrange -5,5<br>grid 1,1,grey<br>linewidth 3<br>drag xy<br>fillcolor orange<br>strokecolor blue<br>slider 0,2*pi,250,30,angle degrees,Rotate arrow<br>arrow 2,2,5,5,8,red</code><br>note: except a combination 'drag' and 'slider' for command 'latex, katex, mathml, html, obabel'
		4323	@ no slider for a math function, these can be traced using command ''trace_jscurve some_function_in_x``
		4324	@ a slider will affect all draggable objects after the ''slider`` command...<br>and can be used to group translate / rotate several objects...<br>until a next ''slider`` or keyword ''killslider``
		4325	@ amount of sliders is not limited.
		4326	@ a slider can not be set ''snaptogrid`` or other ''snapto*`` : you may always use 'drag xy' in combination with the slider objects
		4327	@ <code>javascript:read_dragdrop();</code> will return an array with ''object_number:slider_value``
		4328	@ every draggable object may have its own slider (no limit in amount of sliders)
		4329	@ label: some slider text. <br>Note: on <a target='new' href='https://katex.org'>KaTeX</a> enabled wims, TeX produced by wims command ''mathmlmath``, is allowed.
		4330	@ use fillcolor for slider controlkey
		4331	@ use strokecolor for slider bar
		4332	@ use fontfamily / fontcolor to set used fonts
		4333	@ use opacity (only fill opacity will be used) to set transparency
		4334	@ the slider canvas will be added to the ''tooltip div``: so incompatible with command tooltip ; setlimits etc
		4335	@%slider_x_y_angle%%size 300,300%xrange -5,5%yrange -5,5%grid 1,1,grey%linewidth 3%fillcolor orange%strokecolor blue%slider 0,2*pi,300,30,angle active degrees,Rotate arrow%arrow 0,0,4.5,0,8,red%killslider%opacity 200,100%slider -2,2,300,30,x active,move blue rectangle%frect -4,4,1,-1,blue%killslider%linewidth 2%slider -2,2,300,30,y,move green rectangle%frect -4,4,1,-1,green
		4336	@%slider_click%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 2%slider 0,2*pi,300,28,angle degree, name%fillcolor lightgreen%#CLICK ON THE OBJECTS TO ACTIVATE%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
		4337	@%slider_active%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle degree active, name%fillcolor lightgreen%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
		4338	@%slider_animate%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle anim active, name%fillcolor lightgreen%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
		4339	@%slider_html_image%%size 400,400%xrange -6,6%yrange -6,6%bgcolor white%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle active degree,%centered%html 0,0,<img src="gifs/domains/sciences/flasks.svg" width="100px" height="100px">
		4340	*/
		4341	js_function[INTERACTIVE] = 1;
		4342	int_data[2] = 0; /* --> show_display = 0; */
		4343	for(i=0; i<6 ; i++){
		4344	switch(i){
		4345	case 0: double_data[0] = get_real(infile,0);break; /* start value */
		4346	case 1: double_data[1] = get_real(infile,0);break; /* end value */
		4347	case 2: int_data[0] = (int)(get_real(infile,0));break; /* width */
		4348	case 3: int_data[1] = (int)(get_real(infile,0));break; /* height */
		4349	case 4: temp = get_string_argument(infile,0); /* type: x,y,angle */
		4350	if( strstr(temp,"displ")!=0 \|\| strstr(temp,"deg")!=0 \|\| strstr(temp,"rad")!=0 ){int_data[5] = 1; }else{int_data[5] = 0;}
		4351	if(strstr(temp,"anim")!= 0){int_data[3] = 1;}else{int_data[3] = 0;}
		4352	if(strstr(temp,"active")!= 0){onclick = 4;}else{onclick=0;}
		4353	if(strstr(temp,"angle")!= 0){slider_type="R";if( strstr(temp,"rad")!= 0){int_data[2] = 3;}if( strstr(temp,"deg")!= 0){int_data[2] = 4;}}
		4354	else
		4355	if(strstr(temp,"xy") != 0){slider_type = "XY";if( strstr(temp,"disp")!= 0){int_data[2] = 5;}}
		4356	else
		4357	if(strstr(temp,"x") != 0){slider_type = "X";if( strstr(temp,"disp")!= 0){int_data[2] = 1;}}
		4358	else
		4359	if(strstr(temp,"y") != 0){slider_type = "Y";if( strstr(temp,"disp")!= 0){int_data[2] = 2;}}
		4360	else
		4361	canvas_error("slider can be of type: x,y,angle,fun_x:fun_y");
		4362	break;
		4363	case 5: temp = get_string_argument(infile,1); if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\""," ");}
		4364	/* slider label : in case of latex/mathmlmath we need to remove the extra " */
		4365	break;
		4366	}
		4367	}
		4368	if(use_slider == -1 ){ /* add once */
		4369	add_slider(int_data[3]);
		4370	if(int_data[5] == 1 ){add_slider_display(precision,font_size,font_color,stroke_opacity);}
		4371	}
		4372	use_slider++;
		4373	if(int_data[3] == 0){\
18557	bpr	4374
		4375	tmp_buffer=my_newmem(MAX_BUFFER);
18570	bpr	4376	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"slider%d = new slider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]));
18552	bpr	4377	}else{
18557	bpr	4378
18552	bpr	4379	add_slider(int_data[3]);/* use only once !! */
18557	bpr	4380	tmp_buffer=my_newmem(MAX_BUFFER);
18570	bpr	4381	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"slider%d = new animslider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]));
18552	bpr	4382	}
		4383	add_to_buffer(tmp_buffer);
		4384	fprintf(js_include_file,"var slider%d;",use_slider);
		4385	use_dragstuff = 2;
		4386	// dragstuff[22] = 1; /* dragstuff switch no 22 is a slider...*/
		4387	if(onclick != 4 ){ js_function[INTERACTIVE] = 1; }/* no need to click on object to use slider... */
		4388	//js_function[JS_ROTATE_MOUSE] = 1;
		4389	c = 0;
		4390	for(i=last_slider;i<=use_slider;i++){
		4391	int_data[c] = i; c++;
		4392	}
		4393	my_sliders = data2js_array(int_data,use_slider - last_slider+1);
		4394	break;
		4395	case SGRAPH:
		4396	/*
18556	bpr	4397	@ sgraph xstart,ystart,xmajor,ymajor,xminor,yminor,majorgrid_color,minorgrid_color
		4398	@ primitive implementation of a ''broken scale`` graph...
		4399	@ not very versatile: only usable in combination with userdraw <br>eg no other objects will obey this "coordinate system"<br>if you want to place an object into this coordinate system, be aware that 10% or 20% of xsize and/or ysize is ''lost``.<br>Use these "formulas" to recalculate the virtual coordinates:<br>factor=0.8 in case xstart != xmin (or ystart != ymin)<br>factor=0.9 in case xstart = xmin (or ystart = ymin)<br>px_x_point = ((factorxsize)/(xmax - xstart))(x_point - xmax)+xsize<br>x_recalculated = px(xmax - xmin)/xsize + $xmin<br>px_y_point = -1factory_pointysize/(ymax - ystart) + ymaxfactorysize/(ymax - ystart)<br>y_recalculated = ymax - py*(ymax - ymin)/ysize<br>
		4400	@%sgraph%size 400,400%xrange 0,10000%yrange 0,100%sgraph 9000,50,100,10,4,4,grey,blue%userinput_xy%linewidth 2%userdraw segments,red%precision 0%mouse blue,22
18552	bpr	4401	*/
		4402	js_function[DRAW_SGRAPH] = 1;
		4403	for(i = 0 ; i < 8 ;i++){
		4404	switch(i){
		4405	case 0:double_data[0] = get_real(infile,0);break;
		4406	case 1:double_data[1] = get_real(infile,0);break;
		4407	case 2:double_data[2] = get_real(infile,0);break;
		4408	case 3:double_data[3] = get_real(infile,0);break;
		4409	case 4:int_data[0] = (int)(get_real(infile,0));break;
		4410	case 5:int_data[1] = (int)(get_real(infile,0));break;
		4411	case 6:stroke_color = get_color(infile,0);break;
		4412	case 7:font_color = get_color(infile,1);
18557	bpr	4413	tmp_buffer=my_newmem(MAX_BUFFER);
		4414	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "xstart = %f;\n ystart = %f;\ndraw_sgraph(%d,%d,%f,%f,%d,%d,\"%s\",\"%s\",\"%s\",%f,%d);\n", double_data[0],double_data[1],GRID_CANVAS,precision,double_data[2],double_data[3],int_data[0],int_data[1],stroke_color,font_color,font_family,stroke_opacity,font_size));
18552	bpr	4415	add_to_buffer(tmp_buffer);
		4416	break;
		4417	default:break;
		4418	}
		4419	}
		4420	/* sgraph(canvas_type,precision,xmajor,ymajor,xminor,yminor,majorcolor,minorcolor,fontfamily,opacity)*/
		4421	break;
		4422	case SNAPTOFUNCTION:
		4423	/*
		4424	@ snaptofunction some_function_in_x,some_funtion_in_y
		4425	@ alternative: snaptofun
		4426	@ the next object will snap to the calculated values
		4427	@ note: snaptofun is probably not really useful feature...
		4428	@ if you want only modification of y-values,just use: <code>snaptofunction x,5*sin(1/y)</code>
		4429	@ if you want only modification of x-values,just use: <code>snaptofunction 5*sin(1/x),y</code>
		4430	@ for now only one instance of ''snaptofunction`` is allowed
		4431	@ use rawmath on your functions: no validity checking is done by wims !
		4432	@ note: switching x and y coordinates? <code>snaptofunction y,x</code>
		4433	@%snaptofunction_1%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%snaptofunction x,5sin(x)%linewidth 3%crosshairsize 6%userdraw crosshairs,red%linewidth 2%curve blue,5sin(x)%xunit = x-value%display x,blue,22
		4434	@%snaptofunction_2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%snaptofunction y^2-9,y%#snaptofunction y^2-9,abs(y)%linewidth 3%crosshairsize 6%userdraw crosshairs,red%linewidth 2%curve blue,sqrt(x+9)%curve blue,-1*sqrt(x+9)%yunit = y-value%display y,blue,22
		4435	*/
		4436	temp = get_string_argument(infile,0);
		4437	use_snap = 2;
		4438	use_snap = 5;
		4439	js_function[JS_MATH] = 1;
		4440	fprintf(js_include_file,"var snap_fun = {x:to_js_math('%s'),y:to_js_math('%s')};function snap_to_fun(px,py){ var x = px2x(px); var y = px2y(py); return [ x2px(eval(snap_fun.x)) , y2px(eval(snap_fun.y)) ];};",temp,get_string(infile,1));
		4441	break;
		4442	case SNAPTOPOINTS:
		4443	/*
		4444	@ snaptopoints x1,y1,x2,y2,x3,y3....
		4445	@ a userdraw object will snap to these points.
18572	bpr	4446	@ the array size (e.g. the number of points) of command ''snaptopoints`` is limited by constant MAX_INT (canvasdraw.h)<br>this command may be repeated multiple times (no limit) to add points
18552	bpr	4447	@ a draggable object (use command ''drag x\|y\|xy``) will snap to the closed of these points when dragged (mouseup)
		4448	@ other options: use keyword ''snaptogrid``, ''xsnaptogrid`` or ''ysnaptogrid``
		4449	@%snaptopoints%size 400,400%xrange -5,5%yrange -5,5%snaptopoints -1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%linewidth 2%points red,-1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%userdraw arrows,red
		4450	@%snaptopoints%size 400,400%xrange -5,5%yrange -5,5%snaptopoints -1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%linewidth 3%%points blue,-1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%drag xy%ftriangle -4,0,-2,3,0,0,red
		4451	*/
		4452	i = 0;
		4453	while( ! done ){ /* get next item until EOL*/
		4454	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		4455	if(i%2 == 0 ){
		4456	double_data[i] = get_real(infile,0); /* x */
		4457	}
		4458	else {
		4459	double_data[i] = get_real(infile,1); /* y */
		4460	}
		4461	i++;
		4462	}
		4463	decimals = find_number_of_digits(precision);
		4464	/* NEED AN EXTRA COUNTER VARIABLE FOR MORE THAN 2 CALLS */
		4465	fprintf(js_include_file,"if( temp_push_array === 'undefined' ){var temp_push_array;};if( points_to_snap_on === 'undefined' ){var points_to_snap_on;};var temp_push_array = [%s];\n",double_xy2js_array(double_data,i,decimals));
		4466	if( snap_to_points_cnt == 0 ){
		4467	fprintf(js_include_file,"points_to_snap_on = temp_push_array;function find_min_diff(x,y,X,Y){var diff = 100000000;var chk;var idx = 0;var p = 0;while(X[p] != null){chk = distance(x,y,X[p],Y[p]);if( chk < diff ){ diff = chk; idx = p;};p++;};return idx;};function snap_to_points(x,y){x = px2x(x); y = px2y(y);var xpoints = points_to_snap_on[0];var ypoints = points_to_snap_on[1];var idx = find_min_diff(x,y,xpoints,ypoints);x = xpoints[idx];y = ypoints[idx];return [x2px(x),y2px(y)];};");
		4468	}else{
		4469	fprintf(js_include_file,"points_to_snap_on[0].push.apply(points_to_snap_on[0],temp_push_array[0]);points_to_snap_on[1].push.apply(points_to_snap_on[1],temp_push_array[1]);");
		4470	}
		4471	snap_to_points_cnt = 1; /* do not repeat including the js-functions...just once*/
		4472	use_snap = 4;
		4473	break;
		4474	case SNAPTOGRID:
		4475	/*
18556	bpr	4476	@ snaptogrid
		4477	@ keyword (no arguments required)
		4478	@ a draggable object (use command ''drag x\|y\|xy``) will snap to the given grid when dragged (mouseup)
		4479	@ in case of userdraw the drawn points will snap to xmajor / ymajor grid
		4480	@ if no grid is defined, points will snap to every integer xrange/yrange value. (eg snap_x=1,snap_y=1)
		4481	@ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
		4482	@ if xminor / yminor is defined,(use keyword ''axis`` to activate the minor steps) the drawing will snap to xminor and yminor<br>use only even dividers in x/y-minor...for example <code>snaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code> will snap on x=0, x=0.5, x=1, x=1.5 .... will snap on y=0, y=0.25 y=0.5 y=0.75 ...
		4483	@%snaptogrid_1%size 400,400%xrange -5,5%yrange -5,5%axis%axisnumbering%precision 1%grid 1,1,grey,2,2,6,grey%linewidth 2%snaptogrid%userdraw crosshairs,blue%mouse red,22
		4484	@%snaptogrid_2%size 400,400%xrange -5,5%yrange -5,5%axis%axisnumbering%precision 1%grid 1,1,grey,4,1,6,grey%linewidth 1%snaptogrid%userdraw crosshairs,blue%mouse red,22
18552	bpr	4485	*/
		4486	use_snap = 1;
		4487	break;
		4488	case SQUARE:
		4489	/*
		4490	@ square x,y,side (px),color
		4491	@ draw a square with left top corner (x:y) with side ''side`` in color 'color'
		4492	@ use command <code>fsquare x,y,side,color</code> for a filled square
		4493	@ use command/keyword <a href='#filled'>filled</a> before command <code>square x,y,side,color</code>
		4494	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		4495	@%square%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%filled%fillcolor blue%square 0,0,120,green
		4496	*/
		4497	for(i=0;i<4;i++){
		4498	switch(i){
		4499	case 0:double_data[0] = get_real(infile,0);break; /* x1-values */
		4500	case 1:double_data[1] = get_real(infile,0);break; /* y1-values */
		4501	case 2:double_data[2] = get_real(infile,0);break; /* width in px */
		4502	case 3:stroke_color = get_color(infile,1);/* name or hex color */
		4503	decimals = find_number_of_digits(precision);
		4504	double_data[3] = double_data[0] + (xmax - xmin)*double_data[2]/xsize;
		4505	double_data[4] = double_data[1] + -1(ymax - ymin)double_data[2]/ysize;
		4506	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	4507	tmp_buffer=my_newmem(MAX_BUFFER);
		4508	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,1,[%.f,%.f,%.f,%.f],[%.f,%.f,%.f,%.f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[3],decimals,double_data[3],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[4],decimals,double_data[4],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4509	add_to_buffer(tmp_buffer);
		4510	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		4511	reset();break;
		4512	default: break;
		4513	}
		4514	}
		4515	dragstuff[1] = 1;
		4516	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4517	break;
		4518	case STATUS:
		4519	/*
		4520	@ status
		4521	@ keyword
		4522	@ alernative: nostatus
		4523	@ used to override the effects of ''status=done`` in wims (answer.phtml)
		4524	@ affects ''readonly`` in inputfields / textareas in canvasimage and all userdraw based commands
		4525	@ e.g.: if keyword ''status`` is set, the pupil will be able to modify the canvas when the ''wims $status variable`` is set to ''done``
		4526	*/
11806	schaersvoo	4527
18552	bpr	4528	fprintf(js_include_file,"\nwims_status=\"waiting\";\n");
		4529	break;
		4530	case STRING:
		4531	/*
18556	bpr	4532	@ string color,x,y,the text string
		4533	@ may be set ''onclick`` or ''drag xy``
		4534	@ note: when set ''onclick``, use an extra command ''fontsize`` (default: fontsize=12) to adjust the size of the clicked text-string<br>note: a clicked text string will be hardcoded : fontsize+10 in the font family courier
18572	bpr	4535	@ unicode supported: <code>string red,0,0,\\u2232</code><br> See <a target='new' href='https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode'>https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode</a><br> See <a target='new' href='https://en.wikipedia.org/wiki/Greek_script_in_Unicode'>https://en.wikipedia.org/wiki/Greek_script_in_Unicode</a>
18556	bpr	4536	@ use a command like <code>fontfamily italic 24px Arial</code> to set fonts on browser that support font change
		4537	@ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>The font family for the sub/sup string will be Helvetica e.g. your font family settings will be ignored <br>to force end the subscript/supscript, use an extra space...see example:
		4538	@%string_sup_sub%size 400,400%xrange -6,6%yrange -6,6%fontfamily 22px Arial%# you can use a single space for separation in formula...%# use double space to create new word%string blue,-5,3,H_3O^+ + OH^- \\u2192 2H_2O%# you can use a single space for separation in formula...%string red,-5,-3,H_3 O^+ + OH^\\u2212 \\u2192 2H_2 O%
		4539	@%string%size 400,400%xrange -10,10%yrange -10,10%fontfamily 14px Arial%crosshair -3,-3,red%crosshair 3,3,blue%string red,-3,-3,Hello World%fontfamily Italic 18px Arial%string red,3,3,Hello World%fontfamily 22pt STIX%string black,-10,8,\\u03B1 \\u03B2 \\u03B3 \\u03B4 \\u03B5 \\u03B6 \\u03B7 \\u03B8 \\u03B9 \\u03BA \\u03BB \\u03BC \\u03BD \\u03BE \\u03BF
18552	bpr	4540	*/
		4541	if( use_rotate == TRUE ){js_function[JS_ROTATE_MOUSE] = 1; }
		4542	dragstuff[14] = 1;
		4543	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4544	for(i=0;i<5;i++){
		4545	switch(i){
		4546	case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		4547	case 1: double_data[0] = get_real(infile,0);break; /* x in xrange*/
		4548	case 2: double_data[1] = get_real(infile,0);break; /* y in yrange*/
		4549	case 3: decimals = find_number_of_digits(precision);
		4550	if(use_affine == TRUE ){ transform(2,2);}
		4551	/* rotate is done by HTML5/CANVAS context rotation */
		4552	temp = get_string_argument(infile,1);
		4553	if(strstr(temp,"_") != NULL \|\| strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
		4554	decimals = find_number_of_digits(precision);
		4555	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	4556	tmp_buffer=my_newmem(MAX_BUFFER);
		4557	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.f],[%.f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4558	add_to_buffer(tmp_buffer);
		4559	if(onclick != 0){object_cnt++;}
		4560	//onclick = 0;
		4561	//use_offset = 0;
		4562	reset();
		4563	break;
		4564	default:break;
		4565	}
		4566	}
		4567	break;
		4568	case STRINGUP:
		4569	/*
18556	bpr	4570	@ stringup color,x,y,rotation_degrees,the text string
		4571	@ may be set ''onclick`` or ''drag xy``
		4572	@ note: when set ''onclick``, use an extra command ''fontsize`` (default: fontsize=12) to adjust the size of the clicked text-string<br>note: a clicked text string will be hardcoded : fontsize+10 in the font family courier
		4573	@ unicode supported: <code>stringup red,0,0,45,\\u2232</code>
		4574	@ use a command like <code>fontfamily bold 34px Courier</code> to set fonts on browser that support font change
		4575	@ you could use keyword <a href='#yoffset'>yoffset</a> to -sometimes- do a small correction of text placement under/above a point (e.g. text & point have thesame coordinates)
18572	bpr	4576	@ note: no need to ''killrotate`` after ''stringup``<br><code>onclick<br>rotate 45<br>string red,0,0,AAAAAA<br>killrotate<br>string red,4,4,BBBBBB</code><br>is identical with:<br><code>onclick<br>stringup red,0,0,45,AAAAAA<br>string red,4,4,BBBBBB</code>
18556	bpr	4577	@ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>to end the subscript/supscript, use an extra space...see example:
		4578	@%stringup_sub_sup%size 400,400%xrange -6,6%yrange -6,6%fontfamily 22px Arial%# use single space for separation in formula...%# use double space to create new word%stringup red,-5,0,45,H_3 O^+ + OH^\\u2212 \\u2192 2H_2 O%
		4579	@%stringup%size 400,400%xrange -10,10%yrange -10,10%fontsize 24%fontfamily 14px Arial%crosshair -3,0,red%crosshair 3,0,blue%onclick%stringup red,-3,0,-90,Hello World%drag xy%stringup red,-3,0,-45,Hello World%stringup red,-3,0,45,Hello World%stringup red,-3,0,90,Hello World%stringup blue,3,0,-90,Hello World%stringup blue,3,0,-45,Hello World%stringup blue,3,0,45,Hello World%stringup blue,3,0,90,Hello World
11806	schaersvoo	4580
18552	bpr	4581	*/
		4582	/* html5 canvas rotation is only used for text objects */
		4583	use_rotate = TRUE ;
		4584	dragstuff[14] = 1;
		4585	js_function[JS_ROTATE_MOUSE] = 1;
		4586	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
10953	bpr	4587
18552	bpr	4588	for(i=0;i<6;i++){
		4589	switch(i){
		4590	case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		4591	case 1: double_data[0] = get_real(infile,0);break; /* x */
		4592	case 2: double_data[1] = get_real(infile,0);break; /* y */
		4593	case 3: angle = get_real(infile,0);break;/* rotation */
		4594	case 4: decimals = find_number_of_digits(precision);
		4595	temp = get_string_argument(infile,1);
		4596	if(strstr(temp,"_") != NULL \|\| strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
		4597	decimals = find_number_of_digits(precision);
		4598	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	4599	tmp_buffer=my_newmem(MAX_BUFFER);
		4600	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.f],[%.f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4601	add_to_buffer(tmp_buffer);
		4602	if(onclick != 0){object_cnt++;}
		4603	//onclick = 0;
		4604	//use_offset = 0;
		4605	reset();
		4606	break;
		4607	default:break;
		4608	}
		4609	}
		4610	use_rotate = FALSE;
		4611	break;
		4612	case STYLE:
		4613	/*
18556	bpr	4614	@ highlight color,opacity,linewidth
		4615	@ NOT IMPLEMENTED
		4616	@ use command ''onclick``: when the object receives a userclick it will increase its linewidth
18552	bpr	4617	*/
		4618	break;
		4619	case STROKECOLOR:
		4620	/*
		4621	@ strokecolor colorname or #hex
		4622	@ to be used for commands that do not supply a color argument (like command ''linegraph``)
		4623	*/
		4624	stroke_color = get_color(infile,1);
		4625	break;
		4626	case FLY_TEXT:
		4627	/*
		4628	@ text fontcolor,x,y,font,text_string
		4629	@ font may be described by keywords: giant,huge,normal,small,tiny
		4630	@ use command ''fontsize`` to increase base fontsize for these keywords
		4631	@ may be set ''onclick`` or ''drag xy``
		4632	@ backwards compatible with flydraw
		4633	@ unicode supported: text red,0,0,huge,\\u2232
		4634	@ special: use '_' and '^' to imitate html sup/sub, like H_3O^+ + OH^\\u22i2 \\u2192 2H_2 O
		4635	@ much better to use command <a href='#string'>string</a> combined with <a href='#fontfamily'>fontfamily</a> for a more fine grained control over html5 canvas text element
		4636	@ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>to end the subscript/supscript, use an extra space...see <a href='#string'>string </a> command
		4637	@ Avoid mixing old flydraw commands ''text``, ''textup`` with new canvasdraw commands ''string``, ''stringup``. If the fontfamily was set completely like <code>fontfamily italic 24px Arial</code>. In that case reset ''fontfamily`` to something lke ''fontfamily Arial`` before the old flydraw commands.
		4638	@%text%size 400,400%xrange -10,10%yrange -10,10%fontsize 14%onclick%drag xy%text green,-4,-4,small,Hello World%drag xy%text red,-4,-2,large,Hello World%drag xy%text blue,-4,0,huge,Hello World%drag xy%text green,-4,3,giant,Hello World%drag xy
		4639	*/
		4640	for(i = 0; i < 5 ;i++){
		4641	switch(i){
		4642	case 0: stroke_color = get_color(infile,0);break;/* font_color == stroke_color name or hex color */
		4643	case 1: double_data[0] = get_real(infile,0);break; /* x */
		4644	case 2: double_data[1] = get_real(infile,0);break; /* y */
		4645	case 3: fly_font = get_string_argument(infile,0);
		4646	if(strcmp(fly_font,"giant") == 0){
		4647	fly_font_size = (int)(font_size + 24);
		4648	}
		4649	else {
		4650	if(strcmp(fly_font,"huge") == 0){
		4651	fly_font_size = (int)(font_size + 14);
		4652	}
		4653	else {
		4654	if(strcmp(fly_font,"large") == 0){
		4655	fly_font_size = (int)(font_size + 6);
		4656	}
		4657	else {
		4658	if(strcmp(fly_font,"small") == 0){
		4659	fly_font_size = (int)(font_size - 4);
		4660	if(fly_font_size<0){fly_font_size = 8;}
		4661	}
		4662	}
		4663	}
		4664	}
		4665	break;
		4666	case 4:
		4667	temp = get_string_argument(infile,1);
		4668	if(strstr(temp,"_") != NULL \|\| strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
		4669	decimals = find_number_of_digits(precision);
		4670	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		4671	if(use_affine == TRUE ){ transform(2,2);}
18557	bpr	4672	tmp_buffer=my_newmem(MAX_BUFFER);
		4673	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.f],[%.f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,%s,%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,fly_font_size,"null",my_sliders,rotation_center,use_offset));
18552	bpr	4674	add_to_buffer(tmp_buffer);
		4675	if(onclick != 0){object_cnt++;}
		4676	reset();
		4677	break;
		4678	default:break;
		4679	}
		4680	}
		4681	dragstuff[14] = 1;
		4682	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4683	break;
		4684	case TEXTAREA:
		4685	/*
18556	bpr	4686	@ textarea x,y,cols,rows,readonly,value
		4687	@ may be further controlled by <a href="#css">css</a>
		4688	@ if ''$status=done`` (e.g. in answer.phtml) the inputfield will be cleared and set readonly. Override this by keyword <a href="#status">status</a>.
		4689	@ if mathml inputfields are present and / or some userdraw is performed, these data will <b>not</b> be send as well (<code>javascript:read_canvas();</code>)
		4690	@ keyword ''xoffset \| centered`` is not active for command ''textarea``
		4691	@%textarea%size 400,400%xrange -10,10%yrange -10,10%css color:red;background-color:lightblue;font-size:14px;text-align:center%textarea -3,-2,6,3,1,?%css color:blue;background-color:yellow;font-size:14px;text-align:center%textarea 0,-2,8,2,1,?
18552	bpr	4692	*/
		4693	js_function[DRAW_TEXTAREAS] = 1;
		4694	for(i = 0 ; i<6;i++){
		4695	switch(i){
		4696	case 0: int_data[0]=x2px(get_real(infile,0));break; /* x in px */
		4697	case 1: int_data[1]=y2px(get_real(infile,0));break; /* y in px */
		4698	case 2: int_data[2]=abs( (int)(get_real(infile,0)));break;/* cols */
		4699	case 3: int_data[3]=abs( (int)(get_real(infile,0)));break;/* rows */
		4700	case 4: if( get_real(infile,1) >0){int_data[4] = 1;}else{int_data[3] = 0;};break; /* readonly */
		4701	case 5: temp = get_string_argument(infile,1);
18557	bpr	4702	tmp_buffer=my_newmem(MAX_BUFFER);
		4703	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_textareas(%d,%d,%d,%d,%d,%d,%d,\"%s\",\"%s\");\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],css_class,temp));
18552	bpr	4704	add_to_buffer(tmp_buffer);
		4705	input_cnt++;break;
		4706	default: break;
		4707	}
		4708	}
		4709	if(reply_format == 0 ){reply_format = 15;}
		4710	reset();
		4711	break;
		4712	case TEXTFILL:
		4713	/*
		4714	@ textfill x0,y0,color,some_text
		4715	@ x0,y0 in xrange / yrange
		4716	@ color will be used for the font color
		4717	@ use command <a href="#fontfamily">fontfamily</a> to set font type and size
		4718	@ there is also a command <a href="#userdraw">userdraw textfill,color,some_text</a>
		4719	@%textfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%fontfamily 24pt Arial%circles red,0,0,3,3,3,6%textfill 4,4,blue,HELLO WORLD
		4720	*/
11806	schaersvoo	4721
18552	bpr	4722	js_function[DRAW_TEXTFILL] = 1;
		4723	if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
		4724	js_function[DRAW_FILLTOBORDER] = 1;
		4725	add_js_filltoborder(canvas_type);
		4726	}
		4727	decimals = find_number_of_digits(precision);
		4728	for(i=0;i<4;i++){
		4729	switch(i){
		4730	case 0: double_data[0] = get_real(infile,0); break; /* x in px */
		4731	case 1: double_data[1] = get_real(infile,0); break; /* y in py */
		4732	case 2: font_color = get_color(infile,0); break;
		4733	case 3: temp = get_string(infile,1);
18557	bpr	4734	tmp_buffer=my_newmem(MAX_BUFFER);
		4735	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_textfill(%d,%.f,%.f,'%s','%s',%d,%d,'%s',false); ",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],font_color,font_family,xsize,ysize,temp));
18552	bpr	4736	add_to_buffer(tmp_buffer);
		4737	fill_cnt++;
		4738	break;
		4739	default:break;
		4740	}
		4741	}
		4742	reset();
		4743	break;
		4744	case FLY_TEXTUP:
		4745	/*
18556	bpr	4746	@ textup fontcolor,x,y,font,text_string
		4747	@ can <b>not</b> be set ''onclick`` or ''drag xy`` (because of translaton matrix...mouse incompatible)
		4748	@ font may be described by keywords: giant,huge,normal,small,tiny
		4749	@ use command ''fontsize`` to increase base fontsize for the keywords
		4750	@ backwards compatible with flydraw
		4751	@ unicode supported: textup red,0,0,huge,\\u2232
		4752	@ use command ''stringup`` and ''fontfamily`` for a more fine grained control over html5 canvas text element
		4753	@ Avoid mixing old flydraw commands ''text``, ''textup`` with new canvasdraw commands ''string``; ''stringup``. If the fontfamily was set completely like <code>fontfamily italic 24px Arial</code>. In that case reset ''fontfamily`` to something like ''fontfamily Arial`` before the old flydraw commands.
18552	bpr	4754	*/
		4755	js_function[DRAW_TEXTS] = 1;
		4756	for(i = 0; i<5 ;i++){
		4757	switch(i){
		4758	case 0: font_color = get_color(infile,0);break;/* name or hex color */
		4759	case 1: int_data[0] = x2px(get_real(infile,0));break; /* x */
		4760	case 2: int_data[1] = y2px(get_real(infile,0));break; /* y */
		4761	case 3: fly_font = get_string_argument(infile,0);
		4762	if(strcmp(fly_font,"giant") == 0){
		4763	fly_font_size = (int)(font_size + 24);
		4764	}
		4765	else {
		4766	if(strcmp(fly_font,"huge") == 0){
		4767	fly_font_size = (int)(font_size + 14);
		4768	}
		4769	else {
		4770	if(strcmp(fly_font,"large") == 0){
		4771	fly_font_size = (int)(font_size + 6);
		4772	}
		4773	else {
		4774	if(strcmp(fly_font,"small") == 0){
		4775	fly_font_size = (int)(font_size - 4);
		4776	if(fly_font_size<0){fly_font_size = 8;}
		4777	}
		4778	}
		4779	}
		4780	}
		4781	break;
		4782	case 4:
		4783	decimals = find_number_of_digits(precision);
		4784	temp = get_string_argument(infile,1);
		4785	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	4786	tmp_buffer=my_newmem(MAX_BUFFER);
		4787	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_text(%d,%d,%d,%d,\"%s\",\"%s\",%.2f,90,\"%s\",%d,%.2f,%d);\n",STATIC_CANVAS,int_data[0],int_data[1],fly_font_size,"null",font_color,stroke_opacity,temp,use_rotate,angle,use_offset));
18552	bpr	4788	add_to_buffer(tmp_buffer);
		4789	reset();
		4790	//use_offset = 0;
		4791	break;
		4792	default:break;
		4793	}
		4794	}
		4795	break;
		4796	case TRACE_JSCURVE:
		4797	/*
18556	bpr	4798	@ trace_jscurve some_math_function
		4799	@ will use a crosshair to trace the jsmath curve
		4800	@ two inputfields will display the current x/y-values (numerical evaluation by javascript)
		4801	@ default labels ''x`` and ''y``; use commands ''xlabel some_x_axis_name`` and ''ylabel some_y_axis_name`` to customize the labels for the input fields
		4802	@ use commands fontsize and css to format the fonts for labels and inputfields.
		4803	@ use commands ''linewidth, strokecolor, crosshairsize`` to adjust the corsshair.
		4804	@ the client browser will convert your math function to javascript math.<br>use parenthesis and rawmath: use 2*x instead of 2x etc etc no check is done on the validity of your function and/or syntax (use error console to debug any errors...)
		4805	@ be aware that the formulas of the plotted function(s) can be found in the page javascript source
		4806	@%trace_jscurve%size 400,400%xrange -10,10%yrange -10,10%precision 0%axis%axisnumbering%grid 2,2,grey,2,2,5,gray%recision 100%css color:blue;%linewidth 4%crosshairsize 8%trace_jscurve 5sin(0.1x^2)%linewidth 1%jsplot red,5sin(0.1x^2)%#only one curve can be traced
18552	bpr	4807	*/
		4808	js_function[INTERACTIVE] = 1;
		4809	js_function[DRAW_CROSSHAIRS] = 1;
		4810	js_function[DRAW_LINES] = 1;
		4811	js_function[JS_MATH] = 1;
		4812	add_trace_js_mouse(TRACE_CANVAS,stroke_color,get_string(infile,1),font_size,stroke_opacity,line_width,crosshair_size,css_class);
		4813	break;
		4814	case TRANGE:
		4815	/*
		4816	@ trange tmin,tmax
		4817	@ alternative: ranget
		4818	@ default -2,2
		4819	*/
		4820	use_parametric = TRUE;
		4821	for(i = 0 ; i<2; i++){
		4822	switch(i){
		4823	case 0: tmin = get_real(infile,0);break;
		4824	case 1: tmax = get_real(infile,1);break;
		4825	default: break;
		4826	}
		4827	}
		4828	if(tmin >= tmax ){canvas_error(" trange is not OK: tmin < tmax!\n");}
		4829	break;
		4830	case TRANSLATION:
		4831	/*
18556	bpr	4832	@ translation tx,ty
		4833	@ alternative: translate
		4834	@ will translate the next objects tx in xrange and ty in yrange
		4835	@ use command ''killtranstation`` to end the command
18569	bpr	4836	@%translation%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%fillpattern grid%triangle -6,6,8,6,5,1,blue%translation 2,2%ftriangle -6,6,8,6,5,1,red
18552	bpr	4837	*/
		4838	for(i = 0 ; i<2;i++){
		4839	switch(i){
		4840	case 0: affine_matrix[4] = get_real(infile,0);break;
		4841	case 1: affine_matrix[5] = get_real(infile,1);
		4842	use_affine = TRUE;
		4843	/* the other values affine_matrix[0..3] remain untouched*/
		4844	break;
		4845	default: break;
		4846	}
		4847	}
		4848	break;
		4849	case TRIANGLE:
		4850	/*
18556	bpr	4851	@ triangle x1,y1,x2,y2,x3,y3,color
		4852	@ use ftriangle or keyword <a href='#filled'>filled</a> for a solid triangle
		4853	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		4854	@%triangle%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%opacity 250,150%drag xy%triangle 0,0,-4,4,6,8,red%drag xy%ftriangle 0,0,-4,-4,6,-8,red%fillpattern grid%drag xy%ftriangle -6,6,8,6,5,1,blue
18552	bpr	4855	*/
		4856	for(i=0;i<7;i++){
		4857	switch(i){
		4858	case 0: double_data[0] = get_real(infile,0);break; /* x */
		4859	case 1: double_data[1] = get_real(infile,0);break; /* y */
		4860	case 2: double_data[2] = get_real(infile,0);break; /* x */
		4861	case 3: double_data[3] = get_real(infile,0);break; /* y */
		4862	case 4: double_data[4] = get_real(infile,0);break; /* x */
		4863	case 5: double_data[5] = get_real(infile,0);break; /* y */
		4864	case 6: stroke_color = get_color(infile,1);/* name or hex color */
		4865	decimals = find_number_of_digits(precision);
		4866	if( use_rotate == TRUE ){ rotate(6,angle,rotationcenter,2);}
		4867	if( use_affine == TRUE ){ transform(6,2);}
		4868	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	4869	tmp_buffer=my_newmem(MAX_BUFFER);
		4870	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4871	add_to_buffer(tmp_buffer);
		4872	if(onclick != 0){object_cnt++;}
		4873	/* object_cnt++;*/
		4874	reset();
		4875	break;
		4876	default: break;
		4877	}
		4878	}
		4879	dragstuff[5] = 1;
		4880	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4881	break;
		4882	case TRIANGLES:
		4883	/*
18556	bpr	4884	@ triangles color,x1,y1,x2,y2,x3,y3,...
		4885	@ use ftriangles or keyword <a href='#filled'>filled</a> for solid triangles
		4886	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		4887	@%triangles%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%onclick%triangles red,0,0,-4,4,6,8,0,0,-4,-4,6,-8,-6,6,8,6,5,1%# the same as 3 calls to command triangle
18552	bpr	4888	*/
		4889	stroke_color = get_color(infile,0);/* name or hex color */
		4890	i = 0;
		4891	decimals = find_number_of_digits(precision);
		4892	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
11806	schaersvoo	4893
18552	bpr	4894	while( ! done ){
		4895	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		4896	double_data[0] = get_real(infile,0); /* x1 */
		4897	double_data[1] = get_real(infile,0); /* y1 */
		4898	double_data[2] = get_real(infile,0); /* x2 */
		4899	double_data[3] = get_real(infile,0); /* y2 */
		4900	double_data[4] = get_real(infile,0); /* x3 */
		4901	double_data[5] = get_real(infile,1); /* y3 */
18557	bpr	4902	tmp_buffer=my_newmem(MAX_BUFFER);
		4903	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	4904	add_to_buffer(tmp_buffer);
		4905	if(onclick != 0){object_cnt++;}
		4906	i = i + 6;
		4907	}
		4908	reset();
		4909	dragstuff[5] = 1;
		4910	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		4911	break;
		4912	case USERBOXPLOT:
		4913	/*
18556	bpr	4914	@ userboxplot
		4915	@ keyword, no arguments
		4916	@ use before command <a href="#boxplot">boxplot x_or_y,box-height_or_box-width,x_or_y-position</a>
		4917	@ if set, the student will have to calculate "min,Q1,median,Q3,max" and feed these data into the ''draw_boxplot`` function
		4918	@ for example: put the canvas-script into a html element with id='boxplot' and set style='display:none'<br>define a variable called ''student_boxplot`` and fill it with the 5 student-data (from inputfields or something)<br><code>var student_boxplot = new Array(5)<br>function show_boxplot(){<br>student_boxplot[0] = min;<br>student_boxplot[1] = Q1;<br>student_boxplot[2] = median;<br>student_boxplot[3] = Q3;<br>student_boxplot[4] = max;<br>document.getElementById('boxplot').style.display = "block";<br>draw_boxplot(12345,1,2.00,5.00,[0,0,0,0,0],4,"0,0,255",0.78,"255,165,0",0.60,1,0,1,1);<br>};</code><br>In the canvas-script the function draw_boxplot has the following arguments:<br>draw_boxplot=function(canvas_type,xy,hw,cxy,data,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1)
18552	bpr	4919	*/
		4920	js_function[DRAW_BOXPLOT] = 1;
		4921	fprintf(js_include_file,"var boxplot_source = 3;\n");
		4922	js_function[DRAW_JSBOXPLOT] = 2;
		4923	break;
		4924	case USERBOXPLOTDATA:
		4925	/*
18556	bpr	4926	@ userboxplotdata
		4927	@ keyword, no arguments
		4928	@ use before command <a href="#boxplot">boxplot x_or_y,box-height_or_box-width,x_or_y-position</a>
		4929	@ if set, the student will have to generate some statistical data. These data should be put in a named array ''student_boxplot_data``
		4930	@ ''min,Q1,median,Q3,max`` are calculated by a js-function and the 'draw_boxplot' function will draw a boxplot.
		4931	@ see command <a href="#userboxplot">userboxplot</a> for calling 'draw_boxplot()'
18552	bpr	4932	*/
		4933	js_function[DRAW_BOXPLOT] = 1;
		4934	fprintf(js_include_file,"var boxplot_source = 2;\n");
		4935	js_function[DRAW_JSBOXPLOT] = 1;
		4936	break;
		4937	case USERDRAW:
		4938	/*
		4939	@ userdraw object_type,color
		4940	@ only a single object_type is allowed.
		4941	@ right mouse click will remove last drawn object.
		4942	@ for multiple different 'userdraw' objects in an exercise, use command <a href="#multidraw">multidraw</a>
18572	bpr	4943	@ implemented object_type: <ul><li>point</li><li>points</li><li>crosshair</li><li>crosshairs</li><li>line</li><li>lines</li><li>vline</li><li>vlines</li><li>hline</li><li>hlines</li><li>demiline</li><li>demilines</li><li>segment</li><li>segments</li><li>polyline \| brokenline</li><li>circle</li><li>circles</li><li>arrow</li><li>arrow2 (double arrow)</li><li>arrows</li><li>arrows2 (double arrows)</li><li>curvedarrow</li><li>curvedarrows</li><li>curvedarrow2</li><li>curvedarrows2</li><li>triangle</li><li>polygon</li><li>poly[3-9] (e.g poly3 ... poly7...poly9</li><li>rect</li><li>roundrect</li><li>rects</li><li>roundrects</li><li>freehandline \| path</li><li>freehandlines \| paths</li><li>clickfill: fill the clicked area with color<br>multiple areas may be selected <br>multiple colors may be provided using commands <a href='#colorpalette'>colorpalette color1,color2,color3,...</a> use <a href='#replyformat'>replyformat 10</a> for checking the user click color ... reply=x1:y1:color1,x2:y2:color2...<br>attention: this will <b>not</b> work for pattern filling, because the pattern image is only generated once and after creation can not be changed !<br>the opacity of this image on a separate canvas is set to 0.01 and not 0 (!!)...in the ''fill algorithm`` the opacity of the matching pixels is set to 1</li><li>dotfill: fill the clicked area with a dot pattern; use command linewidth to change dot size</li><li>diamondfill: fill the clicked area with a diamond pattern</li><li>hatchfill: fill the clicked area with a hatch pattern</li><li>gridfill: fill the clicked area with a grid pattern</li><li>textfill: fill the clicked area with a repeating string<br>userdraw textfill,blue,some_text<br>use command <a href="#fontfamily">fontfamily</a> to adjust text style and size</li><li>''clickfill \| pattern filling`` in general:<br>the clicks may be set <a href="#snaptogrid">snaptogrid</a><br>can be used together with command <a href="#floodfill">floodfill or fill</a><br><b>always</b> use together with command <a href="#clearbutton">clearbutton some_text</a> for removal of all click_colored areas<br>the function read_canvas() will return the click coordinates in the sequence of the user clicks<br>use command <a href="#canvastype">canvastype</a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)</li><li>text <br>an inputfield is provided, unicode allowed. The text is drawn a the mouse click, or if used with command ''userinput inputfield`` also at the given x/y-coordonates</li><li>arc</li><li>arcs</li><li>image<br>only a single "image" of every supported type() may be added to canvas window from the surrounding html page.<br>the image should have an 'id' and an onclick handler.<br>() supported types are ''svg``,''bitmap``,''p-element``,''div-element`` and ''mathml/tex-code`` with ''\\mmlid{int}``.</li><li>images</li><li>input<br>place a single inputfield on ''canvas`` <br>use commands 'css' for css styling: use command ''linewidth`` for adjusting the input field size (default 1)</li><li>inputs<br>place multiple inputfield: placing inputfields on top of each other is not possible</li><li>function : identical to <a href="#userinput">userinput function</a></li></ul>
18552	bpr	4944	@ note: mouselisteners are only active if ''$status != done`` (eg only drawing in an active/non-finished exercise) <br> to overrule use command/keyword ''status`` (no arguments required)
		4945	@ note: object_type text: Any string or multiple strings may be placed anywhere on the canvas.<br>Use command ''fontfamily`` to set font
		4946	@ note: object_type polygone: Will be finished (the object is closed) when clicked on the first point of the polygone again.
		4947	@ note: all objects will be removed -after a javascript confirm box- when clicked on an object point with middle or right mouse button (e.g. event.button != 1: all buttons but left)
18572	bpr	4948	@ use a prefix <a href='#filled'>filled</a> or ''f`` to set fillable objects filled. (fcircles,filledcircles etc)<br> in case of ''fillpattern`` do not use the ''f`` prefix !
18552	bpr	4949	@ for non solid filling, use command <a href="#fillpattern">fillpattern grid,hatch,diamond,dot</a>
		4950	@ use <a href='#opacity'>opacity int,int</a> and <a href='#fillcolor'>fillcolor color</a> to trigger coloured filling of fillable objects
		4951	@ use command ''dashed`` and/or ''dashtype int,int`` to trigger dashing
		4952	@ use command ''replyformat int`` to control / adjust output formatting of javascript function read_canvas(); (the defaults should be fine...)
		4953	@ may be combined with onclick or drag xy of other components of flyscript objects (although not very useful...)
		4954	@ may be combined with keyword <a href='#userinput_xy'>userinput_xy</a>
		4955	@ may be combined width the <a href='#snaptogrid'>snaptogrid snaptopoints </a> etc, to simplify the checking of the student reply
		4956	@ the cursor may be appropriately styled using command <a href='cursor'>cursor</a>
		4957	@ note: when zooming / panning after a drawing, the drawing will NOT be zoomed / panned...this is a "design" flaw and not a feature <br>To avoid trouble do not use zooming / panning together width userdraw.!<br>use command <a href="#multidraw">multidraw</a> is this is a problem for you...
		4958	@ note: the default replyformat for ''userdraw input(s),color`` used format x1;y1;text1 \n x2;y2;test2 \n x_n;y_n;text_n (e.g. it is not a comma separated array...use ''direct exec`` to test)
		4959	@ note: a special case is ''userdraw image,boguscolor``. Images (bitmap or svg or div) present in the exercise page and the img/svg/div-tag with an unique 'id' and <code>onclick='javascript:place_image_on_canvas(this.id)'</code> can be placed onto the canvas.<br>The ''id`` and (x;y) coordinates will be returned using read_canvas();<br> native MathML, MathJax or KaTeX typesetting may be included in div's.(experiments; wims_modules svn version only!)
		4960	@ note: command <br><code>userdraw function,color</code> is identical to acombination of <code>strokecolor color</code> and <code>userinput function</code><br>
18572	bpr	4961	@ note: commands :<br><code>multicolors red,green,blue<br>multilabel f(x)=:g(x)=:h(x)=<br>userdraw functions3,color</code><br>is identical to commands :<br><code>functionlabel f(x)=:p(x)=:w(x)=<br>strokecolor red<br>userinput function <br>strokecolor green<br>userinput function <br>strokecolor blue<br>userinput function</code>
18552	bpr	4962	@%userdraw_canvastype_a%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%grid 2,2,grey%replyformat 10%colorpalette orange,yellow,red,green,lightgreen,blue,lightblue,cyan%canvastype 4%userdraw clickfill,blue%clearbutton REMOVE LAST RECTANGLE
		4963	@%userdraw_canvastype_b%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%canvastype 4%snaptogrid%replyformat 10%userdraw dotfill,blue%clearbutton REMOVE LAST RECTANGLE
		4964	@%userdraw_rect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw rect,green
		4965	@%userdraw_rects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw rects,green
		4966	@%userdraw_frect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw frect,green
		4967	@%userdraw_frects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw frects,green
		4968	@%userdraw_roundrect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw roundrect,green
		4969	@%userdraw_roundrects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw roundrects,green
		4970	@%userdraw_froundrect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw froundrect,green
		4971	@%userdraw_froundrects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw froundrects,green
		4972	@%userdraw_line%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw line,green
		4973	@%userdraw_lines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw lines,green
		4974	@%userdraw_vline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw vline,green
		4975	@%userdraw_vlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw vlines,green
		4976	@%userdraw_hline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw hline,green
		4977	@%userdraw_hlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw hlines,green
		4978	@%userdraw_demiline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw demiline,green
		4979	@%userdraw_demilines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw demilines,green
		4980	@%userdraw_arc%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw arc,green
		4981	@%userdraw_arcs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw arcs,green
		4982	@%userdraw_point%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw point,green
		4983	@%userdraw_points%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw points,green
		4984	@%userdraw_arrow%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrow,green
		4985	@%userdraw_arrows%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrows,green
		4986	@%userdraw_arrow2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrow2,green
		4987	@%userdraw_arrows2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrows2,green
		4988	@%userdraw_curvedarrow%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrow,red%clearbutton REMOVE ALL ARROWS
		4989	@%userdraw_curvedarrows%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrows,red%clearbutton REMOVE ALL ARROWS
		4990	@%userdraw_curvedarrow2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrow2,red%clearbutton REMOVE ALL ARROWS
		4991	@%userdraw_curvedarrows2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrows2,red%clearbutton REMOVE ALL ARROWS
		4992	@%userdraw_crosshair%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw crosshair,green
		4993	@%userdraw_crosshairs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw crosshairs,green
		4994	@%userdraw_circle%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw circle,green
		4995	@%userdraw_circles%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw circles,green
		4996	@%userdraw_segment%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw segment,green
		4997	@%userdraw_segments%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw segments,green
		4998	@%userdraw_line%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw line,green
		4999	@%userdraw_lines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw lines,green
		5000	@%userdraw_triangle%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw triangle,green
		5001	@%userdraw_poly5%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw poly5,green
		5002	@%userdraw_filled_poly5%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw poly5,green
		5003	@%userdraw_poly7%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw poly7,green
		5004	@%userdraw_filled_poly7%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw poly7,green
		5005	@%userdraw_polyline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw polyline,green
		5006	@%userdraw_freehandline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw freehandline,green
		5007	@%userdraw_filled_freehandline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw freehandline,green
		5008	@%userdraw_freehandlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw freehandlines,green
		5009	@%userdraw_input%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%userdraw input,green
		5010	@%userdraw_inputs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%userdraw inputs,green
		5011	@%userdraw_text%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%fontfamily 42px Courier%userdraw text,green
		5012	@%userdraw_function%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%multicolors orange,red,green,blue,cyan%precision 1000%userdraw functions3,red%jscurve blue,x^2,-x^2,5*cos(x)%precision 1%mouse red,22
		5013	@%userdraw_clickfill_colorpalette%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,4,1,1,6,3,3,3,-3,-3,5%opacity 255,120%colorpalette red,green,yellow,blue%userdraw clickfill,green
		5014	@%userdraw_clickfill_1%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,4,1,1,6,3,3,3,-3,-3,5%opacity 255,120%userdraw clickfill,green
18609	bpr	5015	@%userdraw_clickfill_2%size 400,400%xrange -10,10%yrange -10,10%circles blue,0,0,2,1,1,5,5,5,4,-5,5,6,5,-5,6%userdraw hatchfill,red%#userdraw dotfill,red%#userdraw diamondfill,red%#userdraw gridfill,red
18552	bpr	5016	@%userdraw_clickfill_2%size 400,400%xrange -10,10%yrange -10,10%bgcolor white%# to get nice click coordinates take invisible ''grid`` and use ''snaptogrid`` %grid 1,1,white%snaptogrid%circles blue,0,0,2,1,1,5,5,5,4,-5,5,6,5,-5,6%userdraw gridfill,red
		5017	*/
		5018	if( use_userdraw != 0 ){ /* only one object type may be drawn*/
		5019	canvas_error("Only one userdraw primitive may be used in command 'userdraw' use command 'multidraw' for this...");
		5020	}
		5021	js_function[INTERACTIVE] = 1;
		5022	draw_type = get_string_argument(infile,0);
		5023	if( strcmp(draw_type,"textfill") == 0){
		5024	fprintf(js_include_file,"var userdraw_text_string = \"%s\";", get_string(infile,1));
		5025	}
		5026	else {
		5027	if( strcmp(draw_type,"imagefill") == 0){
		5028	fprintf(js_include_file,"var userdraw_image_url = \"%s\";", get_string(infile,1));
		5029	}
		5030	else {
		5031	stroke_color = get_color(infile,1);
		5032	}
		5033	}
		5034	if( strcmp(draw_type,"clickfill") == 0){use_filled = 1;fill_color = stroke_color;}
		5035	reply_precision = precision;
		5036	use_userdraw = 1;
		5037	fprintf(js_include_file,"\n\
15111	schaersvoo	5038	/* begin userdraw */\
		5039	userdraw_x = new Array();userdraw_y = new Array();userdraw_radius = new Array();\
		5040	var forbidden_zone=[xsize+1,ysize+1];var xy_cnt = 0;\
		5041	var canvas_userdraw = create_canvas%d(%d,xsize,ysize);\
		5042	var context_userdraw = canvas_userdraw.getContext(\"2d\");\
		5043	var use_dashed = %d;\
		5044	var use_snap = %d;if(use_dashed == 1){if( context_userdraw.setLineDash ){context_userdraw.setLineDash([%d,%d]);}else{if(context_userdraw.mozDash){context_userdraw.mozDash = [%d,%d];};};};\
		5045	context_userdraw.lineWidth = %d;var use_filled = %d;\
		5046	context_userdraw.strokeStyle = \"rgba(%s,%.2f)\";\
		5047	context_userdraw.font = \"%s\";\
15128	schaersvoo	5048	var user_is_dragging = false;\
15111	schaersvoo	5049	if(wims_status != \"done\"){\
		5050	canvas_div.addEventListener(\"mousedown\" ,user_draw,false);\
		5051	canvas_div.addEventListener(\"mousemove\" ,user_drag,false);\
		5052	canvas_div.addEventListener(\"touchstart\",function(e){ e.preventDefault();user_draw(e.changedTouches[0]);},false);\
		5053	canvas_div.addEventListener(\"touchmove\" ,function(e){ e.preventDefault();user_drag(e.changedTouches[0]);},false);\
15128	schaersvoo	5054	canvas_div.addEventListener(\"touchend\" ,function(e){ e.preventDefault();user_drawstop(e.changedTouches[0]);},false);\
15111	schaersvoo	5055	};",canvas_root_id,DRAW_CANVAS,use_dashed,use_snap,dashtype[0],dashtype[1],dashtype[0],dashtype[1],line_width,use_filled,stroke_color,stroke_opacity,font_family);
		5056
18552	bpr	5057	if( use_filled == 0 ){
		5058	fprintf(js_include_file,"context_userdraw.fillStyle = \"rgba(255,255,255.0)\";");
		5059	}
		5060	else {
		5061	if( use_filled == 1 ){
		5062	fprintf(js_include_file,"context_userdraw.fillStyle = \"rgba(%s,%.2f)\";",fill_color,fill_opacity);
		5063	}
		5064	else {
		5065	js_function[DRAW_FILL_PATTERN] = 1;
		5066	fprintf(js_include_file,"context_userdraw.fillStyle = create_Pattern(0,0,%d,[%s]);\n",use_filled,fill_color);
		5067	}
		5068	}
		5069	add_js_userdraw(draw_type,stroke_color,stroke_opacity,crosshair_size,arrow_head,use_offset,css_class,use_snap,canvas_type,use_filled,fill_color,fill_opacity,line_width,font_family);
		5070	reset();
		5071	break;
		5072	case USERINPUT:
		5073	/*
18556	bpr	5074	@ userinput function inputfield
		5075	@ alternative: userinput_function
		5076	@ alternative: userinput_xy
		5077	@ ''inputfield`` is only usable in combination with some ''userdraw draw_type``
		5078	@ note: the input fields are not cleared after the object is drawn...be aware of multiple idential drawings (many clicks on the ''ok`` button)
		5079	@ ''userinput function`` may be used any time (e.g. without userdraw)
		5080	@ multiple ''userinput function`` commands may be used.
		5081	@ use command <code>functionlabel some_string</code> to define the inputfield text: default value "f(x)="
		5082	@ use command <code>strokecolor some_color</code> to adjust the plot / functionlabel color
		5083	@ use command <code>css some_css</code> to adjust the inputfields
		5084	@ use command <code>fontsize int</code> to adjust the label fonts. (default 12px)
		5085	@ the user input for the function will be corrected by a simple ''rawmath`` implementation...<br>an error message will be shown if javascript can not interpret the user input
		5086	@%userinput_function%size 400,400%xrange -10,10%yrange -10,10%functionlabel your function g(x)=%axis%axisnumbering%xlabel x-axis%ylabel y-axis%grid 2,2,grey,3,3,5,grey%css color:blue;text-align:center%userinput function%# note: number of function inputs not limited
		5087	@%userinput_points%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%# adding 2 inputfields for x and y%userinput inputfield%userdraw points,blue
		5088	@%userinput_arrows%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%#adding 4 inputfields for (x1;y1)---(x2;y2)%userinput inputfieldd%userdraw arrows,blue
		5089	@%userinput_combined%size 400,400%xrange -10,10%yrange -10,10%functionlabel your function g(x)=%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 0%grid 2,2,grey,3,3,5,grey%css color:blue;text-align:center%precision 1000%strokecolor red%opacity 255,255%userinput function%# note: number of function inputs not limited%userdraw line,blue
18552	bpr	5090	*/
		5091	temp = get_string_argument(infile,1);
		5092	if(strstr(temp,"function") != 0 \|\| strstr(temp,"curve") != 0 \|\| strstr(temp,"plot") != 0 ){
		5093	if( js_function[DRAW_JSFUNCTION] != 1 ){
		5094	js_function[JS_RAWMATH] = 1;
		5095	js_function[DRAW_JSFUNCTION] = 1;
		5096	if(reply_format == 0){reply_format = 24;}/* read canvas_input values */
		5097	add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
		5098	input_cnt++;
		5099	}
		5100	else {
		5101	/* no need to add DRAW_JSFUNCTION, just call it with the parameters */
		5102	fprintf(js_include_file,"add_input_jsfunction(%d,\"%s\",%s,%d,\"%s\",\"%.2f\",%d,%d,%d,%d);\n",input_cnt,css_class,function_label,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],font_size);
		5103	input_cnt++;
		5104	}
		5105	js_function[JS_MATH] = 1;
		5106	js_function[JS_PLOT] = 1;
		5107	}
		5108	else {
		5109	if(strstr(temp,"inputfield") != 0 ){
		5110	js_function[JS_SAFE_EVAL] = 1;
		5111	js_function[ADD_USER_INPUTS] = 1;
		5112	}
		5113	else {
		5114	canvas_error("userinput argument may be \"function\" or \"inputfield\"");
		5115	}
		5116	}
		5117	break;
		5118	case USERINPUT_XY:
		5119	/*
		5120	@ userinput_xy
		5121	@ keyword (no arguments required)
		5122	@ to be used in combination with command "userdraw object_type,color"
		5123	@ if set two (or three) input fields are added to the document<br>(one for x-values, one for y-values and in case of drawing circle one for radius-values)
		5124	@ the student may use this as correction for (x:y) on a drawing (or to draw without mouse, using just the coordinates)
		5125	@ math input is allowed (e.g something like: 1+3,2*6,1/3,sqrt(3), sin(pi/4),10^-2,log(2)...)<br>eval function is ''protected`` against code injection.
		5126	@ can <b>not</b> be combined with command ''intooltip tiptext`` <br>note: the ''tooltip div element`` is used for placing inputfields
		5127	@ user drawings will not zoom on zooming (or pan on panning)
		5128	@ use command ''css some_css`` to adjust the inputarea.
		5129	@ use command ''fontsize int`` to adjust the text labels (if needed)
		5130	@%userinput_xy%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 0%grid 2,2,grey,3,3,6,black%# provides inputfields for (x1:y1)---(x2:y2)%userinput_xy%linewidth 2%precision 1000%userdraw lines,blue
		5131	*/
		5132	/* add simple eval check to avoid code injection with unprotected eval(string) */
		5133	js_function[JS_SAFE_EVAL] = 1;
		5134	js_function[ADD_USER_INPUTS] = 1;
		5135	break;
		5136	case USERINPUT_FUNCTION:
		5137	/*
		5138	@ userinput_function
		5139	@ alternative: userinput
		5140	@ keyword (no arguments required)
		5141	@ if set, a inputfield will be added to the page
		5142	@ repeat keyword for more function input fields
		5143	@ the userinput value will be plotted in the canvas
		5144	@ this value may be read with <code>read_canvas()</code>. <br>for do it yourself js-scripters: If this is the first inputfield in the script, its id is canvas_input0
		5145	@ use before this command ''userinput_function``,<br>commands like ''css some_css``, ''xlabel some_description``, ''opacity int,int``, ''linewidth int``, ''dashed`` and ''dashtype int,int`` to modify
		5146	@ fontsize can be set using command ''fontsize int``
		5147	@ incompatible with command ''intooltip link_text_or_image``: it uses the tooltip div for adding the inputfield
		5148	@%userinput_function%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 0%grid 2,2,grey,2,2,5,grey%precision 1000%linewidth 2%# first inputfield%css color:blue;text-align:center;font-family:Italic;%strokecolor blue%functionlabel g(x)=:p(x)=:k(x)=%userinput function%# second inputfield%css color:green;text-align:center;font-family:Italic;%strokecolor green%userinput function%# third inputfield%css color:purple;text-align:center;font-family:Italic;%strokecolor purple%userinput function%# no limit in number of function inputfields
		5149	*/
		5150	if( js_function[DRAW_JSFUNCTION] != 1 ){
		5151	js_function[DRAW_JSFUNCTION] = 1;
		5152	js_function[JS_RAWMATH] = 1;
		5153	if(reply_format == 0){reply_format = 24;}/* read canvas_input values */
		5154	add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
		5155	input_cnt++;
		5156	}
		5157	else {
		5158	/* no need to add DRAW_JSFUNCTION, just call it with the parameters */
		5159	fprintf(js_include_file,"add_input_jsfunction(%d,\"%s\",%s,%d,\"%s\",\"%.2f\",%d,%d,%d,%d);\n",input_cnt,css_class,function_label,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],font_size);
		5160	input_cnt++;
		5161	}
		5162	js_function[JS_MATH] = 1;
		5163	js_function[JS_PLOT] = 1;
		5164	break;
		5165	case VLINE:
		5166	/*
		5167	@ vline x,y,color
		5168	@ alternative: verticalline
		5169	@ draw a vertical line through point (x:y) in color 'color'
		5170	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		5171	@%vline%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%vline 0,0,red%onclick%vline 1,0,orange%onclick%vline 2,0,blue%onclick%vline 3,0,green
		5172	*/
		5173	for(i=0;i<3;i++) {
		5174	switch(i){
		5175	case 0: double_data[0] = get_real(infile,0);break; /* x-values */
		5176	case 1: double_data[1] = get_real(infile,0);break; /* y-values */
		5177	case 2: stroke_color=get_color(infile,1);/* name or hex color */
		5178	double_data[2] = double_data[0];
		5179	decimals = find_number_of_digits(precision);
		5180	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
18557	bpr	5181	tmp_buffer=my_newmem(MAX_BUFFER);
		5182	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,100ymin,decimals,100ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	5183	add_to_buffer(tmp_buffer);
		5184	if(onclick != 0){object_cnt++;}
		5185	/* object_cnt++; */
		5186	reset();
		5187	break;
		5188	}
		5189	}
		5190	dragstuff[4] = 1;
		5191	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5192	break;
		5193	case VLINES:
		5194	/*
		5195	@ vlines color,x1,y1,x2,y2....
		5196	@ alternative: verticallines
		5197	@ draw vertical lines through points (x1:y1),(x2:y2)... in color 'color'
		5198	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
		5199	@%vlines%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%vlines red,1,0,2,0,3,0,4,0
		5200	*/
		5201	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5202	fill_color = stroke_color;
		5203	i=0;
		5204	while( ! done ){ /* get next item until EOL*/
		5205	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5206	if(i%2 == 0 ){
		5207	double_data[i] = get_real(infile,0); /* x */
		5208	}
		5209	else {
		5210	double_data[i] = get_real(infile,1); /* y */
		5211	}
		5212	i++;
		5213	}
		5214	decimals = find_number_of_digits(precision);
		5215	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5216	for(c = 0 ; c < i-1 ; c = c+2){
18557	bpr	5217	tmp_buffer=my_newmem(MAX_BUFFER);
18607	bpr	5218	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c],decimals,100ymin,decimals,100ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	5219	add_to_buffer(tmp_buffer);
		5220	if(onclick != 0){object_cnt++;}
		5221	/* object_cnt++; */
		5222	}
		5223	reset();
		5224	dragstuff[4] = 1;
		5225	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5226	break;
		5227	case VIDEO:
		5228	/*
		5229	@ video x,y,w,h,videofile location
		5230	@ x,y: left top corner of audio element (in xrange / yrange)
		5231	@ w,y: width and height in pixels
		5232	@ video format may be in *.mp4 (todo: other formats)
		5233	@%video%size 400,400%xrange -10,10%yrange -10,10%opacity 200,100%frect -9,9,6,-6,green%video -5,5,200,200,http://techslides.com/demos/sample-videos/small.mp4
		5234	*/
		5235	js_function[DRAW_VIDEO] = 1;
		5236	for(i=0;i<5;i++){
		5237	switch(i){
		5238	case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x in x/y-range coord system -> pixel */
		5239	case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y in x/y-range coord system -> pixel */
		5240	case 2: int_data[2] = (int) (get_real(infile,0)); break; /* pixel width */
		5241	case 3: int_data[3] = (int) (get_real(infile,0)); break; /* height pixel height */
		5242	case 4: temp = get_string(infile,1);
18557	bpr	5243	tmp_buffer=my_newmem(MAX_BUFFER);
		5244	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_video(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp));
18552	bpr	5245	add_to_buffer(tmp_buffer);
		5246	break;
		5247	default:break;
		5248	}
		5249	}
		5250	reset();
		5251	break;
		5252	case X_AXIS_STRINGS:
		5253	/*
18556	bpr	5254	@ xaxis num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
		5255	@ alternative: xaxistext
		5256	@ usable for commands <a href="#numberline">numberline</a> and <a href="#grid">grid</a> or combinations thereof
		5257	@ use these x-axis num1...num_n values instead of default xmin...xmax
		5258	@ in case of command ''grid``. there is no need to use keyword <a href="#axisnumbering">axisnumbering</a>
		5259	@ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
		5260	@ use command ''fontcolor``, ''fontfamily`` to adjust font <br>defaults: black,12,Arial<br>note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
		5261	@ a javascript error message will flag non-matching value:name pairs
		5262	@ if the ''x-axis words`` are too big and will overlap, a simple alternating offset will be applied
		5263	@ to be used before command grid (see <a href="#grid">command grid</a>)
		5264	@ ''xmajor`` steps should be synchronised with numbers eg. ''1`` in the next example <code>grid 1,100,grey,1,4,6,grey</code>
		5265	@%xaxistext%size 800,200%xrange -1,13%yrange -5,10%axis%xaxistext 1:january:2:february:3:march:4:april:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%grid 1,4,grey,1,2,10,red
18552	bpr	5266	*/
		5267	use_axis_numbering++;
		5268	temp = get_string(infile,1);
		5269	if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
		5270	if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
		5271	fprintf(js_include_file,"x_strings[%d] = [\"%s\"];x_strings_up[%d] = null;",use_axis_numbering,temp,use_axis_numbering);
		5272	break;
		5273	case X_AXIS_STRINGS_UP:
		5274	/*
18556	bpr	5275	@ xaxisup num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
		5276	@ alternative: xaxistextup
		5277	@ the text will be rotated 90° up
		5278	@ no need to use keyword <a href="#axisnumbering">axisnumbering</a>
		5279	@ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
		5280	@ use these x-axis num1...num_n values instead of default xmin...xmax
		5281	@ use command ''fontcolor``, <a href="#fontfamily">fontfamily</a> to adjust font <br>defaults: black,12,Arial<br>note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
		5282	@ a javascript error message will flag non-matching value:name pairs
		5283	@ if the ''x-axis words`` are too big, they will overlap the graph<br> (in this case the text will start from ysize upwards)
		5284	@ to be used before command grid (see <a href="#grid">command grid</a>)
		5285	@''xmajor`` steps should be synchronised with numbers eg. "1" in the next example <code>grid 1,100,grey,1,4,6,grey</code>
		5286	@%xaxistextup%size 800,300%xrange -1,13%yrange -10,10%fontfamily Italic 18pt Courier%axis%xaxistextup 1:january:2:february:3:march:4:april:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%grid 1,4,grey,1,2,10,red
18552	bpr	5287	*/
		5288	use_axis_numbering++;
		5289	temp = get_string(infile,1);
		5290	if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
		5291	if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
		5292	fprintf(js_include_file,"x_strings_up[%d] = 1;x_strings[%d] = [\"%s\"];",use_axis_numbering,use_axis_numbering,temp);
		5293	break;
		5294	case XERRORBARS:
		5295	/*
		5296	@ xerrorbars color,E1,E2,x1,y1,x2,y2,...,x_n,y_n
		5297	@ draw multiple points with x-errorbars E1 (error value left from point) and E2 (error value right from point) at given coordinates in color 'color'
		5298	@ the errors E1 and E2 values are in xrange.
		5299	@ use command ''linewidth int`` to adust size
		5300	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		5301	@%xerrorbars%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%xerrorbars red,0.8,1.3,0,0,1,1,2,3,3,2,4,5,5,2,6,1,-1,-2,-2,0,-3,2,-4,4,-5,-1
8386	schaersvoo	5302
18552	bpr	5303	*/
		5304	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5305	fill_color = stroke_color;
		5306	i=0;
		5307	while( ! done ){ /* get next item until EOL*/
		5308	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5309	if(i%2 == 0 ){
		5310	double_data[i] = get_real(infile,0); /* x */
		5311	}
		5312	else {
		5313	double_data[i] = get_real(infile,1); /* y */
		5314	}
		5315	i++;
		5316	}
		5317	decimals = find_number_of_digits(precision);
		5318	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5319	for(c = 2 ; c < i-1 ; c = c+2){
18557	bpr	5320	tmp_buffer=my_newmem(MAX_BUFFER);
		5321	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,20,[%.f],[%.f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18552	bpr	5322	add_to_buffer(tmp_buffer);
		5323	/* object_cnt++; */
		5324	if(onclick != 0){object_cnt++;}
		5325	}
		5326	reset();
		5327	dragstuff[20] = 1;
		5328	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5329	break;
		5330	case NEWRANGE:
		5331	/*
		5332	@ newrange xmin,xmax,ymin,ymax
		5333	@ objects defined after command will make use of this new range
		5334	@ https://wimsedu.info/?topic=dessiner-des-portions-de-fonctions-sur-un-meme-graphe
		5335	*/
		5336	for(i = 0 ; i<4; i++){
		5337	switch(i){
		5338	case 0: xmin = get_real(infile,0);break;
		5339	case 1: xmax = get_real(infile,0);break;
		5340	case 2: ymin = get_real(infile,0);break;
		5341	case 3: ymax = get_real(infile,1);break;
		5342	default: break;
		5343	}
		5344	}
18557	bpr	5345	tmp_buffer=my_newmem(MAX_BUFFER);
		5346	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "\n\nxmin = %f;xmax = %f;ymin = %f;ymax = %f;\n\n",xmin,xmax,ymin,ymax));
18552	bpr	5347	add_to_buffer(tmp_buffer);
		5348	break;
		5349	case XRANGE:
		5350	/*
		5351	@ xrange xmin,xmax
		5352	@ alternative: rangex
		5353	@ if not given: 0,xsize (eg in pixels)
		5354	*/
18556	bpr	5355	for(i = 0 ; i<2; i++){
		5356	switch(i){
		5357	case 0: xmin = get_real(infile,0);break;
		5358	case 1: xmax = get_real(infile,1);break;
		5359	default: break;
		5360	}
		5361	}
		5362	if(xmin >= xmax){canvas_error(" xrange is not OK: xmin < xmax !");}
		5363	fprintf(js_include_file,"var xmin = %f;var xmax = %f;",xmin,xmax);
		5364	found_size_command++;
		5365	break;
18552	bpr	5366	case XSNAPTOGRID:
		5367	/*
18556	bpr	5368	@ xsnaptogrid
		5369	@ keyword (no arguments required)
		5370	@ a draggable object (use command ''drag x\|y\|xy``) will snap to the given x-grid values when dragged (mouseup)
		5371	@ in case of userdraw the drawn points will snap to xmajor grid
		5372	@ if no grid is defined, points will snap to every integer xrange value. (eg snap_x=1)
		5373	@ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
		5374	@ if xminor is defined (use keyword ''axis`` to activate xminor), the drawing will snap to xminor <br>use only even dividers in x-minor...for example<br><code>xsnaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code><br> will snap on x=0, x=0.5, x=1, x=1.5 ....<br> will snap on y=0, y=0.25 y=0.5 y=0.75 ...<br>
		5375	@%xsnaptogrid_1%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%xsnaptogrid%userdraw segments,red%precision 1%display x,red,12
		5376	@%xsnaptogrid_2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%drag x%points red,0,0,0,0,0,0,0,0,0,0
		5377	*/
		5378	use_snap = 2;
		5379	break;
18552	bpr	5380	case XOFFSET:
		5381	/*
18556	bpr	5382	@ xoffset
		5383	@ keyword ; to place the text centered above the text coordinates(x:y) ...
		5384	@ may be used for points or other things requiring centered labels
		5385	@ use <a href="#fontfamily">fontfamily</a> for setting the font
		5386	@ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-library)
18552	bpr	5387	@%xoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
		5388	*/
18556	bpr	5389	use_offset = 2;
		5390	break;
18552	bpr	5391	case XYOFFSET:
		5392	/*
18556	bpr	5393	@ xyoffset
		5394	@ keyword ; to place the text (x:y) to (x+dx:y+dy)... dx/dy are dependent on fontsize/fontfamily
		5395	@ may be used for points or other things requiring labels
		5396	@ use <a href="#fontfamily">fontfamily</a> for setting the font
		5397	@ only active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-librariy
		5398	@ in case of inputfields the inputfield will be centered x and y on its coordinates.<br>for example:<br>inputs 1,1,10,? <br>point 1,1,red <br> the point will be completely invisible<br>note: keyword ''xyoffset`` will also provide centering if used with <a href='#userdraw'>input(s),color</a>
		5399	@%xyoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
18552	bpr	5400	*/
18556	bpr	5401	use_offset = 3;
		5402	break;
18552	bpr	5403	case XUNIT:
		5404	/*
18556	bpr	5405	@ xunit some_unit_for_x-values
		5406	@ unicode allowed (no html code)
		5407	@ use together with command <a href="#display">display or mouse</a>
		5408	@ will display the cursor x-coordinate in ''unit``
		5409	@%xunit%size 400,400%xrange -10,10%yrange -10,10%xunit cm \\u00B2%grid 2,2,grey%linewidth 2%userdraw segments,blue%display x,blue,18
18552	bpr	5410	*/
18556	bpr	5411	fprintf(js_include_file,"unit_x = \"%s\";",get_string(infile,1));
		5412	break;
18552	bpr	5413	case XLABEL:
		5414	/*
		5415	@ xlabel some_string
		5416	@ will be used to create a label for the x-axis (label is in quadrant I)
		5417	@ can only be used together with command ''grid``<br>not depending on keywords ''axis`` and ''axisnumbering``
		5418	@ font setting: italic Courier, fontsize will be slightly larger (fontsize + 4)<br>use command ''fontsize`` to adjust.<br>(command ''fontfamily`` is not active for this command)
		5419	@ use <a href="#ylabel">ylabel</a>
		5420	@%xlabel%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel cm\\u00B2 %ylabel v\\u00B2 %precision 1%grid 2,2,grey,2,2,5,grey
		5421	*/
18556	bpr	5422	temp = get_string(infile,1);
		5423	fprintf(js_include_file,"var xaxislabel = \"%s\";",temp);
		5424	break;
18552	bpr	5425	case XLOGBASE:
		5426	/*
		5427	@ xlogbase number
		5428	@ sets the logbase number for the x-axis
		5429	@ default value 10
		5430	@ use together with commands xlogscale / xylogscale
		5431	*/
18556	bpr	5432	fprintf(js_include_file,"xlogbase=%d;",(int)(get_real(infile,1)));
		5433	break;
18552	bpr	5434	case XLOGSCALE:
		5435	/*
18556	bpr	5436	@ xlogscale ymajor,yminor,majorcolor,minorcolor
		5437	@ the x/y-range are set using commands <code>xrange xmin,xmax</code> and <code>yrange ymin,ymax</code>
		5438	@ ymajor is the major step on the y-axis; yminor is the divisor for the y-step
		5439	@ the linewidth is set using command ''linewidth int``
		5440	@ the opacity of major / minor grid lines is set by command <a href='#opacity'>opacity</a>
		5441	@ default logbase number = 10 ... when needed, set the logbase number with command ''xlogbase number``
		5442	@ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use command ''precision`` before ''xlogscale`` command to set the precision (decimals) of the axis numbering</li><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the colour</li></ul>
		5443	@ note: the complete canvas will be used for the ''log paper``
		5444	@ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
		5445	@ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
		5446	@ note: when using something like ''xrange 0.0001,0.01``...combined with commands <a href='#mouse'>mouse</a> and/or <a href='#userdraw'>userdraw</a>...<br> make sure the <a href='#precision'>precision</a> is set accordingly
		5447	@ note: in case of userdraw, the use of keyword <a href='#userinput_xy'>userinput_xy</a> may be handy !
		5448	@ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
		5449	@ <b>attention</b>: do not use command ''zoom``
		5450	@%xlogscale%size 400,400%xrange 10,50000%yrange -5,5%xlabel x-axis%ylabel y-axis%xlogscale 10,1,black,grey%display x,red,22
18552	bpr	5451	*/
18556	bpr	5452	use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
		5453	if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
		5454	js_function[DRAW_XLOGSCALE] = 1;
		5455	for(i=0;i<4;i++){
		5456	switch(i){
		5457	case 0: double_data[0] = get_real(infile,0);break; /* xmajor */
		5458	case 1: int_data[0] = (int) (get_real(infile,0));break; /* xminor */
		5459	case 2: stroke_color = get_color(infile,0); break;
		5460	case 3: fill_color = get_color(infile,1);
18557	bpr	5461	tmp_buffer=my_newmem(MAX_BUFFER);
		5462	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision));
18556	bpr	5463	fprintf(js_include_file,"use_xlogscale=1;snap_y = %f;snap_x = xlogbase;",double_data[0]/int_data[0]);
		5464	add_to_buffer(tmp_buffer);
		5465	break;
		5466	default:break;
		5467	}
		5468	}
		5469	break;
18552	bpr	5470	case XYLOGSCALE:
		5471	/*
18556	bpr	5472	@ xylogscale majorcolor,minorcolor
		5473	@ the x/y-range are set using commands ''xrange xmin,xmax`` and ''yrange ymin,ymax``
		5474	@ the linewidth is set using command ''linewidth int``
		5475	@ the opacity of major / minor grid lines is set by command ''opacity [0-255],[0-255]``
		5476	@ default logbase number = 10 ... when needed, set the logbase number with command ''xlogbase number`` and/or ''ylogbase number``
		5477	@ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the colour</li></ul>
		5478	@ note: the complete canvas will be used for the ''log paper``
		5479	@ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
		5480	@ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
		5481	@ note: when using something like ''yrange 0.0001,0.01``...combined with commands ''mouse color,fontsize`` and/or ''userdraw type,color``...<br> make sure the precision is set accordingly (eg command ''precision 10000``)
		5482	@ note: in case of userdraw, the use of keyword ''userinput_xy`` may be handy !
		5483	@ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
		5484	@ <b>attention</b>: do not use command ''zoom``
		5485	@%xylogscale%size 400,400%xrange 10,50000%yrange 10,50000%xlabel x-axis%ylabel y-axis%xylogscale black,grey%display xy,red,22
18552	bpr	5486	*/
18556	bpr	5487	use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
		5488	if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
		5489	js_function[DRAW_XYLOGSCALE] = 1;
		5490	for(i=0;i<2;i++){
		5491	switch(i){
		5492	case 0: stroke_color = get_color(infile,0); break;
		5493	case 1: fill_color = get_color(infile,1);
18557	bpr	5494	tmp_buffer=my_newmem(MAX_BUFFER);
		5495	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,precision));
18556	bpr	5496	fprintf(js_include_file,"use_xlogscale=1;use_ylogscale=1;snap_x = xlogbase;snap_y = ylogbase;");
		5497	add_to_buffer(tmp_buffer);
		5498	break;
		5499	default:break;
		5500	}
		5501	}
		5502	break;
18552	bpr	5503	case Y_AXIS_STRINGS:
		5504	/*
18556	bpr	5505	@ yaxis num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
		5506	@ alternative: yaxistext
		5507	@ use command ''fontcolor``, ''fontfamily`` to adjust font <br>defaults: black,12,Arial<br> note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
		5508	@ no need to use keyword <a href="#axisnumbering">axisnumbering</a>
		5509	@ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
		5510	@ use these y-axis num1...num_n values instead of default ymin...ymax
		5511	@ a javascript error message will flag non-matching value:name pairs
		5512	@ to be used before command grid (see <a href="#grid">command grid</a>)
		5513	@%yaxistext%size 400,400%yrange 0,13%xrange -100,500%axis%yaxis 1:january:2:february:3:march:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%#'ymajor' steps should be synchronised with numbers eg. "1" in this example%grid 100,1,grey,4,1,6,grey
18552	bpr	5514	*/
18556	bpr	5515	temp = get_string(infile,1);
		5516	if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
		5517	if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
		5518	fprintf(js_include_file,"y_strings = [\"%s\"];\n ",temp);
		5519	use_axis_numbering++;
		5520	break;
18552	bpr	5521	case YERRORBARS:
		5522	/*
		5523	@ yerrorbars color,E1,E2,x1,y1,x2,y2,...,x_n,y_n
		5524	@ draw multiple points with y-errorbars E1 (error value under point) and E2 (error value above point) at given coordinates in color 'color'
		5525	@ the errors E1 and E2 values are in yrange.
		5526	@ use command ''linewidth int`` to adust size
		5527	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		5528	@%yerrorbars%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%yerrorbars red,0.8,1.3,0,0,1,1,2,3,3,2,4,5,5,2,6,1,-1,-2,-2,0,-3,2,-4,4,-5,-1
		5529	*/
		5530	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5531	fill_color = stroke_color;
		5532	i=0;
		5533	while( ! done ){ /* get next item until EOL*/
18556	bpr	5534	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5535	if(i%2 == 0 ){
		5536	double_data[i] = get_real(infile,0); /* x */
		5537	}
		5538	else
		5539	{
		5540	double_data[i] = get_real(infile,1); /* y */
		5541	}
		5542	i++;
18552	bpr	5543	}
		5544	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5545	for(c = 2 ; c < i-1 ; c = c+2){
18557	bpr	5546	tmp_buffer=my_newmem(MAX_BUFFER);
		5547	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "dragstuff.addShape(new Shape(%d,%d,%d,%d,19,[%.f],[%.f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
18556	bpr	5548	add_to_buffer(tmp_buffer);
18552	bpr	5549	/* object_cnt++; */
18556	bpr	5550	if(onclick != 0){object_cnt++;}
18552	bpr	5551	}
		5552	decimals = find_number_of_digits(precision);
		5553	reset();
		5554	dragstuff[19] = 1;
		5555	if(use_dragstuff == 0 ){ use_dragstuff = 1;}
		5556	break;
		5557	case YOFFSET:
		5558	/*
18556	bpr	5559	@ yoffset
		5560	@ keyword; to place the text centered above the text coordinates(x:y) ...
		5561	@ may be used for points or other things requiring centered labels
		5562	@ use <a href="#fontfamily">fontfamily</a> for setting the font
		5563	@ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-library)
		5564	@%yoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
18552	bpr	5565	*/
18556	bpr	5566	use_offset = 1;
		5567	break;
18552	bpr	5568	case YRANGE:
		5569	/*
		5570	@ yrange ymin,ymax
		5571	@ alternative: rangey
		5572	@ if not given 0,ysize (eg in pixels)
		5573	*/
18556	bpr	5574	for(i = 0 ; i<2; i++){
		5575	switch(i){
		5576	case 0: ymin = get_real(infile,0);break;
		5577	case 1: ymax = get_real(infile,1);break;
		5578	default: break;
		5579	}
		5580	}
		5581	if(ymin >= ymax){canvas_error(" yrange is not OK: ymin < ymax !<br>");}
		5582	fprintf(js_include_file,"var ymin = %f;var ymax = %f;",ymin,ymax);
		5583	found_size_command++;
		5584	break;
18552	bpr	5585	case YSNAPTOGRID:
		5586	/*
18556	bpr	5587	@ ysnaptogrid
		5588	@ keyword (no arguments required)
		5589	@ a draggable object (use command ''drag x\|y\|xy``) will snap to the given y-grid values when dragged (mouseup)
		5590	@ in case of userdraw the drawn points will snap to ymajor grid
		5591	@ if no grid is defined, points will snap to every integer yrange value. (eg snap_y=1)
		5592	@ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
		5593	@ if yminor is defined (use keyword ''axis`` to activate yminor), the drawing will snap to yminor <br>use only even dividers in y-minor...for example<br><code>ysnaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code><br> will snap on x=0, x=0.5, x=1, x=1.5 ....<br> will snap on y=0, y=0.25 y=0.5 y=0.75 ...<br>
		5594	@%ysnaptogrid_1%size 400,400%xrange -10,10%yrange -10,10%ysnaptogrid%grid 1,1,grey%linewidth 2%userdraw crosshairs,blue%css font-size:8px;color:blue%clearbutton delete all crosshairs
		5595	@%ysnaptogrid_2%size 400,400%xrange -10,10%yrange -10,10%ysnaptogrid%grid 1,1,grey%linewidth 3%drag y%points red,0,0,0,0,0,0,0,0,0,0
18552	bpr	5596	*/
18556	bpr	5597	use_snap = 3;
		5598	break;
18552	bpr	5599	case YLABEL:
		5600	/*
		5601	@ ylabel some_string
		5602	@ will be used to create a (vertical) label for the y-axis (label is in quadrant I)
		5603	@ can only be used together with command <a href="#grid">grid</a><br>not depending on keywords ''axis`` and ''axisnumbering``
		5604	@ font setting: italic Courier, fontsize will be slightly larger (fontsize + 4)<br>use command ''fontsize`` to adjust (command ''fontsize`` is not active for this command)
		5605	@ use <a href="#xlabel">xlabel</a>
		5606	@%ylabel%size 400,400%xrange -10,10%yrange -10,10%fontsize 8%axis%axisnumbering%precision 1%xlabel x-axis%ylabel y-axis%grid 1,1,grey,2,2,2,red
		5607	*/
18556	bpr	5608	temp = get_string(infile,1);
		5609	fprintf(js_include_file,"var yaxislabel = \"%s\";",temp);
		5610	break;
18552	bpr	5611	case YLOGBASE:
		5612	/*
		5613	@ ylogbase number
		5614	@ sets the logbase number for the y-axis
		5615	@ default value 10
		5616	@ use together with commands ylogscale / xylogscale
		5617	*/
		5618	fprintf(js_include_file,"ylogbase=%d;",(int)(get_real(infile,1)));
		5619	break;
		5620	case YLOGSCALE:
		5621	/*
18556	bpr	5622	@ ylogscale xmajor,xminor,majorcolor,minorcolor
		5623	@ the x/y-range are set using commands ''xrange xmin,xmax`` and ''yrange ymin,ymax``
		5624	@ xmajor is the major step on the x-axis; xminor is the divisor for the x-step
		5625	@ the linewidth is set using command ''linewidth int``
		5626	@ the opacity of major / minor grid lines is set by command ''opacity [0-255],[0-255]``
		5627	@ default logbase number = 10 ... when needed, set the logbase number with command ''ylogbase number``
		5628	@ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use command ''precision`` before ''ylogscale`` command to set the precision (decimals) of the axis numbering</li><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the color</li></ul>
		5629	@ note: the complete canvas will be used for the ''log paper``
		5630	@ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
		5631	@ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
		5632	@ note: when using something like ''yrange 0.0001,0.01``...combined with commands ''mouse color,fontsize`` and/or ''userdraw type,color``...<br> make sure the precision is set accordingly (eg command ''precision 10000``)
		5633	@ note: in case of userdraw, the use of keyword ''userinput_xy`` may be handy !
		5634	@ <b>attention</b>: do not use command ''zoom``
		5635	@ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
18552	bpr	5636	*/
18555	bpr	5637	use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
		5638	if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
		5639	js_function[DRAW_YLOGSCALE] = 1;
		5640	for(i=0;i<4;i++){
		5641	switch(i){
		5642	case 0: double_data[0] = get_real(infile,0);break; /* xmajor */
		5643	case 1: int_data[0] = (int) (get_real(infile,0));break; /* xminor */
		5644	case 2: stroke_color = get_color(infile,0); break;
		5645	case 3: fill_color = get_color(infile,1);
18557	bpr	5646	tmp_buffer=my_newmem(MAX_BUFFER);
		5647	check_string_length(snprintf(tmp_buffer,MAX_BUFFER, "draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision));
18555	bpr	5648	fprintf(js_include_file,"use_ylogscale=1;snap_x = %f;snap_y = ylogbase;",double_data[0]/int_data[0]);
		5649	add_to_buffer(tmp_buffer);
		5650	break;
		5651	default:break;
		5652	}
		5653	}
		5654	break;
18552	bpr	5655	case YUNIT:
		5656	/*
18556	bpr	5657	@ yunit some_unit_for_y-values
		5658	@ unicode allowed (no html code)
		5659	@ use together with command mousey
		5660	@ will display the cursor y-coordinate in ''unit``
18552	bpr	5661	*/
		5662	fprintf(js_include_file,"unit_y = \"%s\";",get_string(infile,1));
		5663	break;
18555	bpr	5664	case HYPSEGMENTS:
18556	bpr	5665	/*
		5666	@ hypsegments color,x1,y1,x2,y2,...,x_n,y_n
		5667	@ draw multiple hyperbolic segments in the Poincar� disk between points (x1:y1)--(x2:y2).....and... (x_n-1:y_n-1)--(x_n:y_n) in color ''color``
		5668	@ use command ''linewidth int`` to adjust size
		5669	may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
		5670	@%hypsegments%size 400,400%xrange -1,1%yrange -1,1%circles black,0,0,1%linewidth 2%hypsegments green,0.1,-0.3,0.6,0.7,0.3,0,-0.8,0.6,0.6,0.5,-0.5,0.6
		5671	segments_onclick%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
		5672	segments_drag_y%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag y%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
		5673	*/
18555	bpr	5674	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5675	fill_color = stroke_color;
		5676	i=0;
		5677	while( ! done ){ /* get next item until EOL*/
		5678	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5679	if(i%2 == 0 ){
		5680	double_data[i] = get_real(infile,0); /* x */
		5681	}
		5682	else {
		5683	double_data[i] = get_real(infile,1); /* y */
		5684	}
		5685	i++;
		5686	}
		5687	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		5688	if(use_affine == TRUE ){ transform(i-1,2);}
		5689	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5690	decimals = find_number_of_digits(precision);
		5691	for(c = 0 ; c < i-1 ; c = c+4){
18569	bpr	5692	tmp_buffer=my_newmem(MAX_BUFFER);
18555	bpr	5693	if (hypgeodaux(double_data+c,res,0)){
		5694	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,res[0],decimals,res[0],decimals,res[1],decimals,res[1],decimals,res[2],decimals,res[3],decimals,res[4],decimals,res[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5695	}
		5696	else {
		5697	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5698	}
		5699	add_to_buffer(tmp_buffer);
		5700	if(onclick != 0){object_cnt++;}
		5701	}
		5702	reset();
		5703	dragstuff[4] = 1;dragstuff[12] = 1;
		5704	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5705	break;
		5706	case HYPLINES:
		5707	/*
		5708	@ hyplines color,x1,y1,x2,y2...x_n-1,y_n-1,x_n,y_n
		5709	@ draw multiple hyperbolic lines in the Poincar� disk through points (x1:y1)--(x2:y2) ...(x_n-1:y_n-1)--(x_n:y_n) in color 'color'
		5710	may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
		5711	@%hyplines%size 400,400%xrange -1,1%yrange -1,1%circles black,0,0,1%hyplines green,0,0.1,0.1,0.3,0.2,0.3,0.1,0.3,0,0.5,-0.5,0.4
		5712	*/
		5713	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5714	fill_color = stroke_color;
		5715	i=0;
		5716	while( ! done ){ /* get next item until EOL*/
		5717	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
18562	bpr	5718	if(i%2 == 0 ){
		5719	double_data[i] = get_real(infile,0); /* x */
		5720	}
18555	bpr	5721	else {
		5722	double_data[i] = get_real(infile,1); /* y */
		5723	}
		5724	i++;
		5725	}
		5726	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		5727	if(use_affine == TRUE ){ transform(i-1,2);}
		5728	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5729	decimals = find_number_of_digits(precision);
		5730	for(c = 0 ; c < i-1 ; c = c+4){
18569	bpr	5731	tmp_buffer=my_newmem(MAX_BUFFER);
18555	bpr	5732	if (hypgeodaux(double_data+c,res,1)){
		5733	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,res[0],decimals,res[0],decimals,res[1],decimals,res[1],decimals,res[2],decimals,res[3],decimals,res[4],decimals,res[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));}
		5734	else {
		5735	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,res[0],decimals,res[2],decimals,res[1],decimals,res[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5736	}
		5737	add_to_buffer(tmp_buffer);
		5738	if(onclick != 0){object_cnt++;}
		5739	}
		5740	reset();
		5741	dragstuff[4] = 1;dragstuff[12] = 1;
		5742	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5743	break;
		5744	case HYPPOLY:
		5745	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5746	fill_color = stroke_color;
		5747	i=0;
		5748	while( ! done ){ /* get next item until EOL*/
		5749	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5750	if(i%2 == 0 ){
		5751	double_data[i] = get_real(infile,0); /* x */
		5752	}
		5753	else {
		5754	double_data[i] = get_real(infile,1); /* y */
		5755	}
		5756	i++;
		5757	}
		5758	/* il faut rajouter le premier point � la fin*/
		5759	double_data[i]=double_data[0]; double_data[i+1]=double_data[1];
		5760	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		5761	if(use_affine == TRUE ){ transform(i-1,2);}
		5762	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5763	decimals = find_number_of_digits(precision);
		5764	for(c = 0 ; c < i-1 ; c = c+2){
18606	bpr	5765	tmp_buffer=my_newmem(MAX_BUFFER);
18555	bpr	5766	if (hypgeodaux(double_data+c,res,0)){
		5767	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,res[0],decimals,res[0],decimals,res[1],decimals,res[1],decimals,res[2],decimals,res[3],decimals,res[4],decimals,res[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5768	}
		5769	else {
		5770	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5771	}
		5772	add_to_buffer(tmp_buffer);
		5773	if(onclick != 0){object_cnt++;}
18606	bpr	5774	}
18569	bpr	5775	dragstuff[4] = 1; dragstuff[12] = 1;
18555	bpr	5776	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5777	reset();
		5778	break;
		5779	case HYPRAYS:
		5780	/*
18556	bpr	5781	@ hyprays color,xc,yc,x1,y1,x2,y2,x3,y3...x_n,y_n
		5782	@ draw hyperbolic rays in the Poincar� disk in color 'color' and center (xc:yc)
18555	bpr	5783	may be set draggable or onclick (every individual ray)
18556	bpr	5784	@%hyprays%size 400,400%xrange -1,1%yrange -1,1%circles black,0,0,1%onclick%hyprays blue,0.5,0.5,0.3,0.9,-0.3,0.5,-0.4,0,0.4,-0.9,-0.8,0.1,-0.1,-0.9
18555	bpr	5785	hyprays_onclick%size 400,400%xrange -1,1%yrange -1,1%circles black,0,0,1%onclick%hyprays blue,0.5,0.5,0.3,0.9,-0.3,0.5,-0.4,0,0.4,-0.9,-0.8,0.1,-0.1,-0.9
		5786	hyprays_drag_xy%size 400,400%xrange -1,1%yrange -1,1%circles black,0,0,1%drag xy%hyprays blue,0,0,0.3,0.9,-0.3,0.5,-0.4,0,0.4,-0.9,-0.8,0.1,-0.1,-0.9
		5787	*/
		5788	stroke_color=get_color(infile,0);
		5789	fill_color = stroke_color;
		5790	double_data[0] = get_real(infile,0);/* xc */
		5791	double_data[1] = get_real(infile,0);/* yc */
		5792	i=2;
18562	bpr	5793	while( ! done ){ /* get next item until EOL*/
18555	bpr	5794	if(i > MAX_INT - 1){canvas_error("in command rays too many points / rays in argument: repeat command multiple times to fit");}
		5795	if(i%2 == 0 ){
		5796	double_data[i] = get_real(infile,0); /* x */
		5797	}
		5798	else {
		5799	double_data[i] = get_real(infile,1); /* y */
		5800	}
		5801	fprintf(js_include_file,"/* double_data[%d] = %f */\n",i,double_data[i]);
		5802	i++;
		5803	}
		5804	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		5805	if(use_affine == TRUE ){ transform(i-1,2);}
		5806	if( i%2 != 0 ){canvas_error("in command rays: unpaired x or y value");}
		5807	decimals = find_number_of_digits(precision);
		5808	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5809	for(c=2; c<i;c = c+2){
18557	bpr	5810	tmp_buffer=my_newmem(MAX_BUFFER);
18555	bpr	5811	double_data[2]=double_data[c];double_data[3]=double_data[c+1];
		5812	if (hypgeodaux(double_data,res,0)){
		5813	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.f,%.f],[%.f,%.f],[%.f,%.f],[%.f,%.f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,res[0],decimals,res[0],decimals,res[1],decimals,res[1],decimals,res[2],decimals,res[3],decimals,res[4],decimals,res[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5814	}
		5815	else {
		5816	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.f,%.f],[%.f,%.f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[c],decimals,double_data[1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5817	}
		5818	add_to_buffer(tmp_buffer);
		5819	/* object_cnt++; */
		5820	if(onclick != 0){object_cnt++;}
		5821	}
		5822	reset();
		5823	dragstuff[4] = 1; dragstuff[12] = 1;
		5824	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5825	break;
		5826	case HYPCIRCLES:
		5827	/*
		5828	@ hypcircles color,xc1,yc1,r1,xc2,yc2,r2...xc_n,yc_n,r_n
		5829	@ draw hyperbolic circles in Poincar� disk
		5830	@ <b>attention</b> r = radius in x-range (!)
		5831	@ use keyword <code>filled</code> or command <code>fhypcircles</code> to produce solid circles
		5832	@ use command <code>fillcolor color</code> to set the fillcolor
		5833	@%hypcircles%size 400,400%xrange -1,1%yrange -1,1%filled%fillcolor lightblue%opacity 255,50%hypcircles blue,0,0,1,0.4,0.4,3,0.2,0.6,6
		5834	hypcircles_drag%size 400,400%xrange -1,1%yrange -1,1%filled%fillcolor lightblue%opacity 255,50%drag xy%hypcircles blue,0,0,2,0.2,0.2,3,0.2,0.2,5%zoom red
		5835	hypcircles_onclick%size 400,400%xrange -1,1%yrange -1,1%filled%fillcolor lightblue%opacity 255,50%onclick%hypcircles blue,0,0,2,0.2,0.2,3,0.2,0.2,5%zoom red
		5836	hypcircles_drag_slider%size 400,400%xrange -1,1%yrange -1,1%linewidth 2%drag xy%# Click circles(s) to activate%opacity 200,50%fillcolor orange%rotationcenter 2,3%slider 0,2pi,300,30,angle degrees,Rotate%slider -5,5pi,300,30,x display,move in x-direction%slider -10,10*pi,300,30,y display,move in y-direction%hypcircles blue,0,0,2,0.2,0.2,3,0.2,0.2,5
		5837	*/
		5838	stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
		5839	fill_color = stroke_color;
		5840	i=1;
18562	bpr	5841	while( ! done ){ /* get next item until EOL*/
18555	bpr	5842	if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		5843	switch (i%3){
		5844	case 1:double_data[i-1] = get_real(infile,0);break; /* x */
		5845	case 2:double_data[i-1] = get_real(infile,0);break; /* y */
		5846	case 0:double_data[i-1] = get_real(infile,1);break; /* r */
		5847	}
		5848	i++;
		5849	}
		5850	if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,3);}
		5851	if(use_affine == TRUE ){ transform(i-1,3);}
		5852	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		5853	decimals = find_number_of_digits(precision);
		5854	for(c = 0 ; c < i-1 ; c = c+3){
18556	bpr	5855	double Z2=double_data[c]double_data[c]+double_data[c+1]double_data[c+1];//[Z]^2
18555	bpr	5856	double R=tanh(double_data[c+2]/2);double R2=R*R;
		5857	double den=1-R2*Z2; double XY=(1-R2)/den;
		5858	double_data[c]=XY*double_data[c];
		5859	double_data[c+1]=XY*double_data[c+1];
		5860	double_data[c+2]=(1-Z2)/den*R;
18557	bpr	5861	tmp_buffer=my_newmem(MAX_BUFFER);
18555	bpr	5862	check_string_length(snprintf(tmp_buffer,MAX_BUFFER,"dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.f],[%.f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[c+2],double_data[c+2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset));
		5863	add_to_buffer(tmp_buffer);
		5864	if(onclick != 0){object_cnt++;}/* object_cnt++; */
		5865	}
		5866	reset();
		5867	dragstuff[13] = 1;
		5868	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		5869	break;
18552	bpr	5870	case ZOOM:
		5871	/*
18556	bpr	5872	@ zoom button_color
		5873	@ introduce a very small ''controlpanel`` at the lower right corner (font size of the panel is fixed to: 22px Arial)
		5874	@ giving six 15×15px ''active`` rectangle areas<br>(''×,↓,↑,←,→,−,+``) for zooming and/or panning of the image
		5875	@ a mouse wheel is active for in/out zooming. Drag panning is not supported (this will conflict with many ''userdraw`` or ''multidraw`` primitives)
		5876	@ the ''controlpanel`` is not active for a ''userdraw`` mousedown (but it can interfere with some ''userdraw`` types)
		5877	@ the ''×`` symbol will reset to your original xmax/xmin ymax/ymin values.
		5878	@ choose an appropriate color, so the small ''×,↓,↑,←,→,−,+`` are clearly visible
		5879	@ command ''opacity`` may be used to set stroke_opacity of buttons
		5880	@ note: on zooming, text will not increase / decrease the font size (todo??)
		5881	@ note: adding ''zooming`` will increase the size of the javascript include with approx. 11 kb
18552	bpr	5882	*/
18556	bpr	5883	js_function[INTERACTIVE] = 1;
18552	bpr	5884	js_function[JS_ZOOM] = 1;
		5885	if( use_userdraw == 1 ){
		5886	js_function[USERDRAW_AND_ZOOM] = 1;
		5887	fprintf(js_include_file,"forbidden_zone = [%d,%d];",xsize-115,ysize - 20);
		5888	}
		5889	if(jsplot_cnt != -1){ js_function[JSPLOT_AND_ZOOM] = 1;}
		5890	stroke_color = get_color(infile,1);
		5891	/* we use BG_CANVAS (0) */
		5892	add_js_zoom_buttons(stroke_color,stroke_opacity);
		5893	done = TRUE;
		5894	break;
11806	schaersvoo	5895
		5896	/* ready */
18552	bpr	5897	default:sync_input(infile);
		5898	break;
		5899	}
7614	schaersvoo	5900	}
		5901	/* we are done parsing script file */
18556	bpr	5902	if(use_dragstuff != 0){
18562	bpr	5903	/* add the 20kb drag code: nearly always used ... use_dragstuff==1: no-mouse ! */
18556	bpr	5904	add_drag_code(DRAG_CANVAS,use_dragstuff,dragstuff,reply_format);
		5905	if(js_function[JS_ZOOM] == 1){
15111	schaersvoo	5906	js_function[DRAG_AND_ZOOM] = 1;
18556	bpr	5907	}
15111	schaersvoo	5908	}
15116	bpr	5909
14066	bpr	5910	/* check if xrange / yrange was set explicit ... or use xmin=0 xmax=xsize ymin=0 ymax=ysize: Quadrant I */
18556	bpr	5911	if( found_size_command == 1 ){
		5912	fprintf(js_include_file,"var xmin = 0;var xmax = %d;var ymin = 0;var ymax = %d",xsize,ysize);
7983	schaersvoo	5913	}
18556	bpr	5914	else
		5915	{
		5916	if( found_size_command != 3 ){
		5917	canvas_error("Please specify size first and then both xrange and yrange ...");
		5918	}
		5919	}
8257	schaersvoo	5920
18562	bpr	5921	/* if needed, add generic draw functions (grid / xml etc) to buffer: these are no draggable/clickable shapes / objects ! */
18556	bpr	5922	add_javascript_function();
7614	schaersvoo	5923	/* add read_canvas() etc functions if needed */
18556	bpr	5924	if( reply_format > 0 ){ add_read_canvas(reply_format,reply_precision);}
7797	schaersvoo	5925	/* no zoom, just add buffer */
18556	bpr	5926	fprintf(js_include_file,"\n/* add buffer /\n%s};\n/ end wims_canvas_function */\nwims_canvas_function%d();\n",buffer,canvas_root_id);
7614	schaersvoo	5927	/* done writing the javascript include file */
18556	bpr	5928	fclose(js_include_file);
		5929	}
7614	schaersvoo	5930
		5931	/* if using a tooltip, this should always be printed to the .phtml file, so stdout /
18556	bpr	5932	if( use_tooltip > 0 ){
		5933	if( use_tooltip == 1 ){
		5934	add_js_tooltip(tooltip_text,bgcolor);
		5935	}
		5936	else
		5937	{
		5938	if( use_tooltip == 2 ){
		5939	add_js_popup(getfile_cmd);
		5940	}
		5941	}
9329	schaersvoo	5942	}
18556	bpr	5943	exit(EXIT_SUCCESS);
7614	schaersvoo	5944	}
		5945	/* end main() */
		5946
		5947	/******************************************************************************
		5948	**
		5949	** sync_input
		5950	**
		5951	** synchronises input line - reads to end of line, leaving file pointer
		5952	** at first character of next line.
		5953	**
		5954	** Used by:
		5955	** main program - error handling.
		5956	**
		5957	******************************************************************************/
		5958	void sync_input(FILE *infile)
		5959	{
18552	bpr	5960	int c = 0;
7614	schaersvoo	5961
18552	bpr	5962	if( c == '\n' \|\| c == ';' ) return;
		5963	while( ( (c=getc(infile)) != EOF ) && (c != '\n') && (c != '\r') && (c != ';')) ;
		5964	if( c == EOF ) finished = 1;
		5965	if( c == '\n' \|\| c == '\r' \|\| c == ';') line_number++;
		5966	return;
7614	schaersvoo	5967	}
		5968
		5969	/******************************************************************************/
15111	schaersvoo	5970	void transform(int num,int incr){
		5971	/*.
		5972	only "double_data[]" is used for transformations !!
		5973	*/
		5974	int i;int ii;double x,y;
		5975	for(i=0;i<num;i = i+incr){
		5976	ii = i+1;
		5977	x = double_data[i]affine_matrix[0] + double_data[ii]affine_matrix[1]+affine_matrix[4];
		5978	y = double_data[i]affine_matrix[2] + double_data[ii]affine_matrix[3]+affine_matrix[5];
15601	schaersvoo	5979	/*
17351	bpr	5980	printf("(%f:%f) → (%f:%f)<br>",double_data[i],double_data[ii],x,y);
15601	schaersvoo	5981	*/
15111	schaersvoo	5982	double_data[i] = x;
		5983	double_data[ii] = y;
		5984	}
		5985	}
		5986
		5987	void rotate(int num,double angle,double center[],int incr){
		5988	int i;int ii;double rad = angle * 0.0174532925199;
		5989	double c = cos(rad);
		5990	double s = sin(rad);
		5991	double x,y;
		5992	for(i=0;i<num;i = i+incr){
		5993	ii = i+1;
		5994	x = c(double_data[i]-center[0]) + s(double_data[ii] - center[1] ) + center[0];
		5995	y = c(double_data[ii]-center[1]) - s(double_data[i] - center[0] ) + center[1];
		5996	double_data[i] = x;
		5997	double_data[ii] = y;
17351	bpr	5998	// printf("(x:y) - (%f:%f)<br>",x,y);
15111	schaersvoo	5999	}
		6000	}
		6001	/* not used: see transform()
		6002	void translate(int num){
		6003	int i;int ii;
		6004	double x,y;
		6005	for(i=0;i<num;i = i+2){
		6006	ii = i+1;
		6007	x = double_data[i] + affine_matrix[4];
		6008	y = double_data[ii] + affine_matrix[5];
		6009	double_data[i] = x;
		6010	double_data[ii] = y;
		6011	}
		6012	}
		6013	*/
7614	schaersvoo	6014	char str_replace(const char str, const char old, const char new){
18562	bpr	6015	if(strlen(str) > MAX_BUFFER){canvas_error("string argument too big");}
		6016	char ret, r;
		6017	const char p, q;
		6018	size_t oldlen = strlen(old);
		6019	size_t count = 0;
		6020	size_t retlen = 0;
		6021	size_t newlen = strlen(new);
		6022	if (oldlen != newlen){
		6023	for (count = 0, p = str; (q = strstr(p, old)) != NULL; p = q + oldlen){
18552	bpr	6024	count++;
		6025	retlen = p - str + strlen(p) + count * (newlen - oldlen);
18562	bpr	6026	}
18552	bpr	6027	}
18562	bpr	6028	else {
		6029	retlen = strlen(str);
		6030	}
		6031	if ((ret = malloc(retlen + 1)) == NULL){
		6032	ret = NULL;
		6033	canvas_error("string argument is NULL");
		6034	}
		6035	else
		6036	{
		6037	for (r = ret, p = str; (q = strstr(p, old)) != NULL; p = q + oldlen) {
18552	bpr	6038	size_t l = q - p;
		6039	memcpy(r, p, l);
		6040	r += l;
		6041	memcpy(r, new, newlen);
		6042	r += newlen;
18562	bpr	6043	}
		6044	strcpy(r, p);
18552	bpr	6045	}
18562	bpr	6046	return ret;
7614	schaersvoo	6047	}
		6048
		6049	/******************************************************************************/
7848	bpr	6050
7614	schaersvoo	6051	char get_color(FILE infile , int last){
18562	bpr	6052	int c,i = 0,is_hex = 0;
		6053	char temp[MAX_COLOR_STRING], *string;
		6054	const char *not_allowed = "0123456789";
		6055	while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',' ) && ( c != ';' ) && ( c != '\t' ) ){
		6056	if( i > MAX_COLOR_STRING ){ canvas_error("colour string is too big ... ? ");}
		6057	if( c == '#' ){
18552	bpr	6058	is_hex = 1;
18562	bpr	6059	}
		6060	if( c != ' '){
18552	bpr	6061	if( is_hex == 0 ){if(strchr(not_allowed,c) != 0){canvas_error("found something like a number...but is should have been a colour or #hex color number...<br>Do not use R,G,B !!! ");}}
		6062	temp[i]=tolower(c);
		6063	i++;
18562	bpr	6064	}
18552	bpr	6065	}
18562	bpr	6066	if( ( c == '\n' \|\| c == EOF \|\| c == ';' \|\| c == '\t' ) && last == 0){canvas_error("expecting more arguments in command");}
		6067	if( c == '\n' \|\| c == ';' \|\| c == '\t' ){ done = TRUE; line_number++; }
		6068	if( c == EOF ){finished = 1;}
		6069	if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");}
		6070	temp[i]='\0';
		6071	if( strlen(temp) == 0 ){ canvas_error("expected a colorname or hexnumber, but found nothing !!");}
		6072	if( is_hex == 1 ){
		6073	char red[3], green[3], blue[3];
		6074	red[0] = toupper(temp[1]); red[1] = toupper(temp[2]); red[2] = '\0';
		6075	green[0] = toupper(temp[3]); green[1] = toupper(temp[4]); green[2] = '\0';
		6076	blue[0] = toupper(temp[5]); blue[1] = toupper(temp[6]); blue[2] = '\0';
		6077	int r = (int) strtol(red, NULL, 16);
		6078	int g = (int) strtol(green, NULL, 16);
		6079	int b = (int) strtol(blue, NULL, 16);
		6080	int L0 = 1+snprintf(NULL,0,"%d,%d,%d",r,g,b);
		6081	string = my_newmem(L0);
		6082	snprintf(string,L0,"%d,%d,%d",r,g,b);
		6083	return string;
		6084	}
		6085	else
		6086	{
		6087	string = (char *)my_newmem(sizeof(temp));
		6088	snprintf(string,sizeof(temp),"%s",temp);
		6089	for( i = 0; i < NUMBER_OF_COLORNAMES ; i++ ){
18552	bpr	6090	if( strcmp( colors[i].name , string ) == 0 ){
18562	bpr	6091	return colors[i].rgb;
18552	bpr	6092	}
18562	bpr	6093	}
		6094	canvas_error("I was expecting a color name or hexnumber...but found nothing.");
18552	bpr	6095	}
18562	bpr	6096	return "0,0,255";
7614	schaersvoo	6097	}
		6098
14066	bpr	6099	char get_string(FILE infile,int last){ /* last = 0: more arguments ; last=1 final argument */
18562	bpr	6100	int c,i=0;
		6101	char temp[MAX_BUFFER], *string;
		6102	while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != '\t') ){
		6103	temp[i]=c;
		6104	i++;
		6105	if(i > MAX_BUFFER){ canvas_error("string size too big...repeat command to fit string");break;}
		6106	}
		6107	if( ( c == '\n' \|\| c == '\t' \|\| c == EOF ) && last == 0){
		6108	canvas_error("expecting more arguments in command");}
		6109	if( c == '\n' \|\| c == '\t') { done = TRUE; line_number++; }
		6110	if( c == EOF ) {finished = 1;}
		6111	temp[i]='\0';
		6112	if( strlen(temp) == 0 && last != 3 ){
		6113	canvas_error("expected a word or string, but found nothing!");}
		6114	string=(char *)my_newmem(strlen(temp));
		6115	snprintf(string,sizeof(temp),"%s",temp);
		6116	return string;
7614	schaersvoo	6117	}
		6118
14066	bpr	6119	char get_string_argument(FILE infile,int last){ /* last = 0: more arguments ; last=1 final argument */
18562	bpr	6120	int c,i=0;
		6121	char temp[MAX_BUFFER], *string;
		6122	while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != '\t') && ( c != ',')){
		6123	temp[i]=c;
		6124	i++;
		6125	if(i > MAX_BUFFER){ canvas_error("string size too big...will cut it off");break;}
		6126	}
		6127	if( ( c == '\n' \|\| c == EOF) && last == 0){canvas_error("expecting more arguments in command");}
		6128	if( c == '\n' \|\| c == '\t' ) { line_number++; }
		6129	if( c == EOF ) {finished = 1;}
		6130	if( finished == 1 && last == 0 ){ canvas_error("expected more arguments");}
		6131	temp[i]='\0';
10953	bpr	6132	/*
18562	bpr	6133	17.10.2014 removed (question Perrin)
		6134	may cause some unwanted effects...
		6135	if( strlen(temp) == 0 ){ canvas_error("expected a word or string (without comma), but found nothing !!");}
8322	schaersvoo	6136	*/
18562	bpr	6137	string=(char *)my_newmem(sizeof(temp));
		6138	snprintf(string,sizeof(temp),"%s",temp);
		6139	done = TRUE;
		6140	return string;
7614	schaersvoo	6141	}
		6142
14066	bpr	6143	double get_real(FILE infile, int last){ / accept anything that looks like an number ? last = 0: more arguments ; last=1 final argument */
18562	bpr	6144	int c,i=0,found_calc = 0;
		6145	double y;
		6146	char tmp[MAX_INT];
		6147	/*
		6148	these things are 'allowed functions': *,^,+,-,/,(,),e,arc,cos,tan,pi,log,ln,sqrt,abs
		6149	but there should be a better way to avoid segfaults !
		6150	*/
		6151	const char allowed = "earcostanpilogqb+-/^()";/* assuming these are allowed stuff in a 'number'*/
		6152	const char not_allowed = "#dfhjkmuvwxyz{}[]%&~!$";/ avoid segmentation faults in a "atof()" and "wims eval" */
		6153	while(( (c=getc(infile)) != EOF ) && ( c != ',') && (c != '\n') && (c != '\t') && ( c != ';')){
		6154	if( c != ' ' ){
8224	bpr	6155	if( i == 0 && c == '+' ){
18562	bpr	6156	continue;
8224	bpr	6157	}
7614	schaersvoo	6158	else
		6159	{
18562	bpr	6160	c = tolower(c);
		6161	if( strchr(not_allowed,c) != 0 ){canvas_error("found a character not associated with a number...");}
		6162	if( strchr(allowed,c) != 0 ){found_calc = 1;}/* hand the string over to wims eval() */
		6163	tmp[i] = c;
		6164	i++;
7614	schaersvoo	6165	}
		6166	}
18562	bpr	6167	if( i > MAX_INT - 1){canvas_error("number too large");}
		6168	}
		6169	if( ( c == '\n' \|\| c == EOF \|\| c == ';' \|\| c == '\t' ) && last == 0){canvas_error("expecting more arguments in command");}
		6170	if( c == '\n' \|\| c == ';' \|\| c == '\t' ){ done = TRUE; line_number++; }
		6171	if( c == EOF ){done = TRUE ; finished = 1;}
		6172	tmp[i]='\0';
		6173	if( strlen(tmp) == 0 ){canvas_error("expected a number, but found nothing !!");}
		6174	if( found_calc == 1 ){ /* use wims eval to calculate 2pi/3 /
		6175	void *f = eval_create(tmp);
		6176	assert(f);if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
		6177	y = eval_x(f, 1);
		6178	/* if function is bogus; y = 1: so no core dumps */
		6179	eval_destroy(f);
		6180	}
		6181	else
		6182	{
		6183	y = atof(tmp);
		6184	}
		6185	return y;
7614	schaersvoo	6186	}
		6187	void canvas_error(char *msg){
18562	bpr	6188	fprintf(stdout,"\n</script><hr><span style=\"color:red\">FATAL syntax error: line %d: %s</span><hr>",line_number,msg);
		6189	finished = 1;
		6190	exit(EXIT_SUCCESS);
7614	schaersvoo	6191	}
		6192	/* convert x/y coordinates to pixel */
		6193	int x2px(double x){
18606	bpr	6194	int res=(x-xmin)/(xmax-xmin)*xsize;
		6195	return (res==xsize)?xsize-1:res;
7614	schaersvoo	6196	}
		6197	int y2px(double y){
18606	bpr	6198	int res=(ymax-y)/(ymax-ymin)*ysize;
		6199	return (res==ysize)?ysize-1:res;
7614	schaersvoo	6200	}
		6201	double px2x(int x){
18562	bpr	6202	return (x*(xmax - xmin)/xsize + xmin);
7614	schaersvoo	6203	}
		6204	double px2y(int y){
18562	bpr	6205	return (y*(ymax - ymin)/ysize + ymin);
7614	schaersvoo	6206	}
		6207	void add_to_buffer(char *tmp){
17351	bpr	6208	//fprintf(stdout,"tmp = %s<br>buffer = %s<br>",tmp,buffer);
18562	bpr	6209	if( tmp == NULL \|\| tmp == 0 ){ canvas_error("nothing to add_to_buffer()...");}
		6210	/* do we have enough space left in buffer[MAX_BUFFER] ? */
		6211	int space_left = (int) (sizeof(buffer) - strlen(buffer));
		6212	if( space_left > strlen(tmp)){
		6213	strncat(buffer,tmp,space_left - 1);/* add safely "tmp" to the string buffer */
		6214	}
		6215	else
		6216	{
		6217	canvas_error("your memory buffer is too big<br>simplify your script...it produces too many lines ");
		6218	}
		6219	tmp = NULL;free(tmp);
		6220	return;
7614	schaersvoo	6221	}
		6222	void reset(){
18562	bpr	6223	if(no_reset == FALSE){ /* 8/5/2020 */
		6224	use_filled = FALSE;
		6225	use_dashed = FALSE;
		6226	if(onclick != 4 ){onclick = 0;} /* slider param 'active'... onclick=4 */
		6227	drag_type = -1;
		6228	use_offset = 0;
		6229	}
7614	schaersvoo	6230	}
15111	schaersvoo	6231	char getMML(char tex){
18562	bpr	6232	int my_pipe[2];pid_t pid;
		6233	if(pipe(my_pipe)){canvas_error("mathml(): pipe() failure.\n");}
15111	schaersvoo	6234	pid = fork();
		6235	if (pid == (pid_t) 0){
18562	bpr	6236	char *argv[]={"wims_mathml","--use-zoom","0","--tex-size 100%","--max-mml-size","1024","--tex-string",tex,NULL};
		6237	close(my_pipe[0]);dup2(my_pipe[1], 1);dup2(my_pipe[1], 2);close(my_pipe[1]);
		6238	execv("../bin/wims_mathml",argv);canvas_error("could not execute wims_mathml\n");
15111	schaersvoo	6239	}
		6240	else
15116	bpr	6241	{
18562	bpr	6242	if (pid < (pid_t) 0){
		6243	close(my_pipe[0]);close(my_pipe[1]);canvas_error("mathml(): fork() failure.\n");
		6244	}
		6245	int status;FILE *stream;close(my_pipe[1]);stream = fdopen (my_pipe[0], "r");
		6246	char buffer[MAX_BUFFER+1];memset(buffer,'\0',MAX_BUFFER);
		6247	fgets(buffer, MAX_BUFFER, stream);
		6248	int L0 = 1 + snprintf(NULL,0,"%s", buffer);
		6249	tex = my_newmem(L0);memset(tex,'\0',L0);
		6250	snprintf(tex,L0,"%s",buffer);
		6251	fclose (stream);close(my_pipe[0]);waitpid(pid, &status, 0);
15111	schaersvoo	6252	}
18562	bpr	6253	return tex;
15111	schaersvoo	6254	}
7614	schaersvoo	6255
15111	schaersvoo	6256	char getSVGMOL(char inputtype,char *keys){
		6257	int idx;
		6258	char *forbidden[] = {"-O","-H","-z","-L","-o","-m"};
		6259	char *argv[1+strlen(keys)];
		6260	argv[0] = "obabel"; argv[1] = "-i"; argv[2] = inputtype;
		6261	idx = 3;int i;
		6262	char *ptr = strtok(keys,",");
		6263	while(ptr != NULL ){
		6264	for(i = 0 ; i < 6; i++ ){if( strncmp(ptr,forbidden[i],2) == 0 ){return "NOT ALLOWED ARGUMENT";}}
		6265	argv[idx] = ptr; idx++;
17351	bpr	6266	if(idx > 18){canvas_error("too many arguments for obabel....see docs<br>");}
15111	schaersvoo	6267	ptr = strtok(NULL,",");
		6268	}
		6269	/* last arguments; no 'javascript', only 'svg to STDOUT' and 'NULL' */
		6270	argv[idx] = "-xj";argv[idx+1] = "-o"; argv[idx+2] = "svg";argv[idx+3] = NULL;
		6271	int link[2];
		6272	pid_t pid;
		6273	char buffer[MAX_BUFFER+1];
		6274	memset(buffer,'\0',MAX_BUFFER);
		6275	if (pipe(link)==-1){canvas_error("pipe");}
		6276	if ((pid = fork()) == -1){canvas_error("fork");}
15116	bpr	6277
15111	schaersvoo	6278	char *svgmol = "error";
		6279	int string_length = 0;
15116	bpr	6280
15111	schaersvoo	6281	if(pid == 0) {
		6282	dup2 (link[1], STDOUT_FILENO);
		6283	dup2(link[0], STDERR_FILENO);/* remove annoying messages '1 molecule converted' */
		6284	close(link[0]);
		6285	close(link[1]);
		6286	execvp("obabel",argv);
		6287	} else {
		6288	close(link[1]);
18109	schaersvoo	6289	read(link[0],buffer, sizeof(buffer));
15111	schaersvoo	6290	close(link[0]);
		6291	/* need to remover newline from svg-string on freebsd */
		6292	char *pch = strstr(buffer, "\n");
		6293	while(pch != NULL){
18555	bpr	6294	strncpy(pch, " ", 1);
		6295	pch = strstr(buffer, "\n");
15111	schaersvoo	6296	}
		6297	string_length = 1 + snprintf(NULL,0,"%s",buffer);
		6298	svgmol= my_newmem(string_length);
		6299	snprintf(svgmol,string_length,"%s",buffer);
		6300	wait(NULL);
		6301	}
18562	bpr	6302	return svgmol;
15111	schaersvoo	6303	}
		6304	/* GNU libmatheval library for evaluating mathematical functions. */
15601	schaersvoo	6305	char eval(int xsize,int ysize,char fun,double xmin,double xmax,double ymin,double ymax,int plotsteps,int precision,double rotationcenter[]){
18555	bpr	6306	void *f;
		6307	double x;
		6308	double y;
		6309	double xorg;
		6310	int xv;
		6311	int i = 0;
		6312	int xstep =(int)(xsize/plotsteps);
		6313	if( xstep == 0 ){xstep = 1;}
		6314	double a = (xmax - xmin)/xsize;
		6315	f = eval_create(fun);
		6316	assert (f);
		6317	if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
		6318	/* we supply the true x/y values...draw_curve() will convert these (x:y) to pixels : used for pan/scale */
		6319	double xydata[MAX_BUFFER+1];/* hmmm */
		6320	int lim_ymin =(int)( ymin - 4fabs(ymin));/ 19-4-2015 replacing "abs" by "fabs"*/
		6321	int lim_ymax =(int)( ymax + 4fabs(ymax));/ 19-4-2015 replacing "abs" by "fabs"*/
		6322	double c = 1.0;double s = 1.0;
		6323	if( use_rotate == TRUE ){s = sin(angle0.0174533);c = cos(angle0.0174533);}
		6324	for ( xv = 0 ;xv < xsize ; xv = xv+xstep ){
18562	bpr	6325	x = (double) (xv*a + xmin);
		6326	xorg = x;
		6327	if( i < MAX_BUFFER - 2){
18552	bpr	6328	y = eval_x(f, x);
		6329	if(y < lim_ymax && y > lim_ymin ){
18562	bpr	6330	if( use_affine == TRUE ){
		6331	x = xaffine_matrix[0] + yaffine_matrix[1]+affine_matrix[4];
		6332	y = xorgaffine_matrix[2] + yaffine_matrix[3]+affine_matrix[5];
		6333	}
		6334	if( use_rotate == TRUE){
		6335	x = (c * (x - rotationcenter[0])) + (s * (y - rotationcenter[1])) + rotationcenter[0];
		6336	y = (c * (y - rotationcenter[1])) - (s * (xorg - rotationcenter[0])) + rotationcenter[1];
		6337	}
		6338	xydata[i++] = x;
18552	bpr	6339	xydata[i++] = y;
		6340	}
18562	bpr	6341	}
		6342	else
		6343	{
18552	bpr	6344	canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps or some other means to reduce the amount of data... ");
18562	bpr	6345	}
18552	bpr	6346	}
18562	bpr	6347	eval_destroy(f);
		6348	return double_xy2js_array(xydata,i,find_number_of_digits(precision));
15111	schaersvoo	6349	}
		6350	/* plot a very primitive (!) levelcurve : not to be compared with "flydraw levelcurve" */
		6351	char eval_levelcurve(int xsize,int ysize,char fun,double xmin,double xmax,double ymin,double ymax,int plotsteps,int precision,double level){
18562	bpr	6352	void *f = eval_create(fun);
		6353	assert (f);
		6354	if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
		6355	double a = (double)((xmax - xmin)/plotsteps);
		6356	double b = (double)((ymax - ymin)/plotsteps);
		6357	double x;double y;double diff;
		6358	double xydata[MAX_BUFFER+1];
		6359	int i = 0;
		6360	ymin = ymin - 1;
		6361	xmin = xmin - 1;
		6362	ymax = ymax + 1;
		6363	xmax = xmax + 1;
		6364	for( x = xmin ;x < xmax ; x = x + a ){
		6365	for ( y = ymin ;y < ymax ; y = y + b ){
18552	bpr	6366	if( i < MAX_BUFFER - 2){
18562	bpr	6367	diff = level - eval_x_y(f, x,y);
		6368	if(diff < 0.1 && diff > -0.1){
		6369	xydata[i++] = x;
		6370	xydata[i++] = y;
		6371	}
18552	bpr	6372	}
		6373	else
		6374	{
18562	bpr	6375	canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps, decrease image size...\nor some other means to reduce the amount of data... ");
18552	bpr	6376	}
18562	bpr	6377	}
18552	bpr	6378	}
18562	bpr	6379	eval_destroy(f);
		6380	return double_xy2js_array(xydata,i,find_number_of_digits(precision));
15111	schaersvoo	6381	}
7614	schaersvoo	6382
15111	schaersvoo	6383	/* plot parametric function */
18562	bpr	6384	char eval_parametric(int xsize,int ysize,char fun1,char* fun2,double xmin,
		6385	double xmax,double ymin,double ymax,
		6386	double tmin,double tmax,int plotsteps,int precision,double rotationcenter[]){
		6387	void *fx;
		6388	void *fy;
		6389	double t;
		6390	int i = 0;
		6391	double tstep = (tmax-tmin)/plotsteps;
		6392	if( tstep == 0 ){canvas_error("zero step for t variable : reduce plotsteps or inrease trange");}
		6393	fx = eval_create(fun1);
		6394	fy = eval_create(fun2);
		6395	assert(fx);
		6396	assert(fy);
		6397	if( fx == NULL \|\| fy == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
15111	schaersvoo	6398	/* we supply the true x/y values...draw_curve() will convert these (x:y) to pixels : used for pan/scale */
18562	bpr	6399	double xydata[MAX_BUFFER+1];/* hmmm */
		6400	double x; /* real x-values */
		6401	double y; /* real y-values */
		6402	double xorg;
		6403	/*
		6404	29/12/2020
		6405	disabled to try and synchronise curve+affine behaviour in complex scripts produced by "elec, tool circuit" (BPR)
15623	schaersvoo	6406	int lim_ymin =(int)( ymin - 4*fabs(ymin));
		6407	int lim_ymax =(int)( ymax + 4*fabs(ymax));
		6408	*/
18562	bpr	6409	double c = 1.0;double s = 1.0;
		6410	if( use_rotate == TRUE ){s = sin(angle0.0174533);c = cos(angle0.0174533);}
		6411	for( t = tmin ;t <= tmax ; t = t + tstep ){
		6412	if( i < MAX_BUFFER - 2 ){
18552	bpr	6413	y = eval_t(fy, t);
		6414	/* if(y > lim_ymin && y < lim_ymax){*/
18562	bpr	6415	x = eval_t(fx, t);
		6416	if( x == x){ /* no NaN */
		6417	xorg = x;
		6418	if( use_affine == TRUE ){
		6419	x = xaffine_matrix[0] + yaffine_matrix[1]+affine_matrix[4];
		6420	y = xorgaffine_matrix[2] + yaffine_matrix[3]+affine_matrix[5];
		6421	}
		6422	if( use_rotate == TRUE){
		6423	x = (c * (x - rotationcenter[0])) + (s * (y - rotationcenter[1])) + rotationcenter[0];
		6424	y = (c * (y - rotationcenter[1])) - (s * (xorg - rotationcenter[0])) + rotationcenter[1];
		6425	}
		6426	xydata[i++] = x;
		6427	xydata[i++] = y;
		6428	}
		6429	/* } */
18552	bpr	6430	}
18562	bpr	6431	else
		6432	{
18552	bpr	6433	canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps or some other means to reduce the amount of data... ");
18562	bpr	6434	}
18552	bpr	6435	}
18562	bpr	6436	eval_destroy(fx);
		6437	eval_destroy(fy);
		6438	return double_xy2js_array(xydata,i,find_number_of_digits(precision));
15111	schaersvoo	6439	}
7614	schaersvoo	6440
15111	schaersvoo	6441	char *double_xy2js_array(double xy[],int len,int decimals){
		6442	/*
		6443	1,2,3,4,5,6,7,8 --> [1,3,5,7],[2,4,6,8]
		6444	int xy[] is already checked for errors or overflow in "get_real()"
		6445	just to be sure we double check the size of "temp"
7614	schaersvoo	6446	*/
18562	bpr	6447	char temp[2MAX_BUFFER], string;
		6448	char tmp = my_newmem(16);/ <= 9999999999999999 */
		6449	memset(temp,'\0',2MAX_BUFFER);/ clear memory */
		6450	int i;int space_left;
		6451	temp[0] = '[';/* start js-array */
		6452	for(i = 0; i < len;i = i + 2){ /* x_points[] */
		6453	if(i == len - 2){sprintf(tmp, "%.*f",decimals, xy[i]);}
		6454	else {sprintf(tmp, "%.*f,",decimals,xy[i]);}
		6455	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6456	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}
		6457	else{
		6458	canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce your image size or plotsteps ");}
15111	schaersvoo	6459	}
		6460	strncat(temp,"],[",4); /* close js x_values array and start new */
		6461	for(i = 1; i < len;i = i + 2){ /* y_points */
18557	bpr	6462	if(i == len - 1){ sprintf(tmp, "%.f",decimals,xy[i]);}else{sprintf(tmp, "%.f,",decimals,xy[i]);}
		6463	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6464	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce your image size or plotsteps");}
15111	schaersvoo	6465	}
		6466	strncat(temp,"]",2);
		6467	string=(char *)my_newmem(sizeof(temp));
		6468	snprintf(string,sizeof(temp),"%s",temp);
		6469	return string;
		6470	}
7614	schaersvoo	6471
15111	schaersvoo	6472	char list2js_array(char list, char s){/ abc:defg:hjiuy:qwer --> ["abc","defg","hjiuy","qwer"] */
		6473	#define MAX_ARG 128
18562	bpr	6474	if( strlen(list)> MAX_ARG - 1){canvas_error("argument is too large (> 128)");}
		6475	char tmp[MAX_ARG];
		6476	size_t p = 0;
		6477	tmp[0] = '[';
		6478	tmp[1] = '\"';
		6479	size_t t = 2;
		6480	while(list[p] != '\0'){
		6481	if( list[p] == s[0] ){
		6482	tmp[t++]='\"';tmp[t++]=',';tmp[t++]='\"';
		6483	}
		6484	else
		6485	{
		6486	tmp[t++] = list[p];
		6487	}
		6488	p++;
15111	schaersvoo	6489	}
18562	bpr	6490	tmp[t++]='\"';tmp[t++]=']';tmp[t++]= '\0';
		6491	char js_array = (char )my_newmem(sizeof(tmp));
		6492	snprintf(js_array,sizeof(tmp),"%s",tmp);
		6493	return js_array;
15111	schaersvoo	6494	}
7963	schaersvoo	6495
15111	schaersvoo	6496	char *xy2js_array(int xy[],int len){
		6497	/*
		6498	1,2,3,4,5,6,7,8 --> [1,3,5,7],[2,4,6,8]
		6499	int xy[] is already checked for errors or overflow in "get_real()"
		6500	just to be sure we double check the size of "temp"
7614	schaersvoo	6501	*/
18562	bpr	6502	char temp[MAX_BUFFER], *string;
		6503	char tmp = my_newmem(16);/ <= 9999999999999999 */
		6504	memset(temp,'\0',MAX_BUFFER);/* clear memory */
		6505	int i;int space_left;
		6506	temp[0] = '[';/* start js-array */
		6507	for(i = 0; i < len;i = i + 2){ /* x_points[] */
		6508	if(i == len - 2){sprintf(tmp, "%d", xy[i]);}else{sprintf(tmp, "%d,", xy[i]);}
		6509	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6510	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}
		6511	else {
		6512	canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");}
		6513	}
		6514	strncat(temp,"],[",4); /* close js x_values array and start new */
		6515	for(i = 1; i < len;i = i + 2){ /* y_points */
		6516	if(i == len - 1){ sprintf(tmp, "%d", xy[i]);}else{sprintf(tmp, "%d,", xy[i]);}
		6517	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6518	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}
		6519	else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data\nreduce image size or plotsteps \n");}
		6520	}
		6521	strncat(temp,"]",2);
		6522	string=(char *)my_newmem(sizeof(temp));
		6523	snprintf(string,sizeof(temp),"%s",temp);
		6524	return string;
7614	schaersvoo	6525	}
		6526
15111	schaersvoo	6527	char *data2js_array(int data[],int len){
		6528	/*
		6529	1,2,3,4,5,6,7,8 --> [1,2,3,4,5,6,7,8]
		6530	int data[] is already checked for errors or overflow in "get_real()"
		6531	just to be sure we double check the size of "temp"
7614	schaersvoo	6532	*/
18562	bpr	6533	char temp[MAX_BUFFER], *string;
		6534	char tmp = my_newmem(16);/ <= 9999999999999999 */
		6535	memset(temp,'\0',MAX_BUFFER);/* clear memory */
		6536	int i;int space_left;
		6537	temp[0] = '[';/* start js-array */
		6538	for(i = 0; i < len; i++){
		6539	if(i == len - 1){sprintf(tmp, "%d", data[i]);}else{sprintf(tmp, "%d,", data[i]);}
		6540	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6541	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}
		6542	else{
		6543	canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");
15111	schaersvoo	6544	}
18562	bpr	6545	}
		6546	strncat(temp,"]",2);
		6547	string=(char *)my_newmem(sizeof(temp));
		6548	snprintf(string,sizeof(temp),"%s",temp);
		6549	return string;
15111	schaersvoo	6550	}
7614	schaersvoo	6551
15111	schaersvoo	6552	char *doubledata2js_array(double data[],int len, int decimals){
		6553	/*
15116	bpr	6554	1.4355,2.345353,3.3455 --> [1.44,2.35,3.35]
15111	schaersvoo	6555	double data[] is already checked for errors or overflow in "get_real()"
		6556	just to be sure we double check the size of "temp"
8448	schaersvoo	6557	*/
18562	bpr	6558	char temp[MAX_BUFFER], *string;
		6559	char tmp = my_newmem(16);/ <= 9999999999999999 */
		6560	memset(temp,'\0',MAX_BUFFER);/* clear memory */
		6561	int i;int space_left;
		6562	temp[0] = '[';/* start js-array */
		6563	for(i = 0; i < len; i++){
		6564	if(i == len - 1){sprintf(tmp, "%.*f",decimals,data[i]);}
		6565	else{sprintf(tmp, "%.*f,",decimals,data[i]);}
		6566	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
		6567	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}
		6568	else{
		6569	canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");}
		6570	}
		6571	strncat(temp,"]",2);
		6572	string=(char *)my_newmem(sizeof(temp));
		6573	snprintf(string,sizeof(temp),"%s",temp);
		6574	return string;
15111	schaersvoo	6575	}
13829	bpr	6576
15111	schaersvoo	6577	void *my_newmem(size_t size){
18562	bpr	6578	void *p;
		6579	if((p = malloc(size +1)) == NULL){canvas_error("canvasdraw: ran out of memory\n");}
		6580	return p;
15111	schaersvoo	6581	}
8224	bpr	6582
15111	schaersvoo	6583	int find_number_of_digits(int i){
18562	bpr	6584	if(i < 0 ){ i = -1*i;}
		6585	int digits = 0;
		6586	while ( i > 0){
		6587	digits++;
		6588	i = i/10;
		6589	}
		6590	return digits;
15111	schaersvoo	6591	}
7645	schaersvoo	6592
16828	schaersvoo	6593	int count_substring(char* string, char* substring) {
18164	schaersvoo	6594	int i, j, l1, l2;
16828	schaersvoo	6595	int count = 0;
		6596	l1 = strlen(string);
		6597	l2 = strlen(substring);
		6598	for(i = 0; i < l1 - l2 + 1; i++) {
		6599	if(strstr(string + i, substring) == string + i) {
		6600	count++;
		6601	i = i + l2 -1;
		6602	}
		6603	}
		6604	return count;
		6605	}
11830	schaersvoo	6606
7614	schaersvoo	6607	void check_string_length(int L){
18555	bpr	6608	if( L > MAX_BUFFER-1){
		6609	canvas_error("problem with your arguments to command...");
		6610	}
		6611	return;
7614	schaersvoo	6612	}
18555	bpr	6613	/* useful in hyp commands: determine if the hypsegment is an arc or a line */
		6614	int hypgeodaux(double q, double ress, int full){
		6615	double alpha,beta,gamma,r,cx,cy,a1,a2,a3,tmp,
		6616	nx = -q[0]q[2]q[2]+(q[0]q[0]+q[1]q[1]+1)q[2]-q[0]q[3]*q[3]-q[0],
		6617	ny = -q[1]q[2]q[2]-q[1]q[3]q[3]+(q[0]q[0]+q[1]q[1]+1)*q[3]-q[1],
		6618	dy = -2q[1]q[2]+2q[0]q[3];
		6619	if (dydy1e4 <= nxnx+nyny){
		6620	if(full){
		6621	if (q[1]q[1]+q[0]q[0] > q[2]q[2]+q[3]q[3])
		6622	gamma = atan2(q[1],q[0]);
		6623	else
		6624	gamma = atan2(q[3],q[2]);
		6625	ress[0]=cos(gamma); ress[1]=sin(gamma); ress[2]=-cos(gamma); ress[3]=-sin(gamma);
		6626	}
		6627	else
		6628	{int i;for(i=0;i<4;++i) ress[i]=q[i];}
		6629	ress[5]=(q[0]+q[2])/2;
		6630	ress[6]=(q[1]+q[3])/2;
		6631	return 0;}
		6632	cx = ny/dy; cy=-nx/dy;
		6633	r = sqrt(cxcx+cycy-1);
		6634	if(full)
		6635	{alpha=atan(1/r); beta = atan2(cy,cx);a1=M_PI+beta-alpha;a2=M_PI+beta+alpha;}
		6636	else
		6637	{a1 = atan2(q[1]-cy, q[0]-cx);a2 = atan2(q[3]-cy, q[2]-cx);}
		6638	if (fabs(a2-a1)>M_PI){if(a1<a2) a1+=2M_PI; else a2+=2M_PI;};
		6639	a3 = (a1+a2)/2;
		6640	if(a1>a2) {tmp=a1; a1=a2; a2=tmp;}
		6641	ress[0]=cx;
		6642	ress[1]=cy;
		6643	ress[2]=2*r;
		6644	ress[3]=2*r;
		6645	ress[4]=360+180/M_PI*a1;
		6646	ress[5]=360+180/M_PI*a2;
		6647	ress[6]=cx+r*cos(a3);
		6648	ress[7]=cy+r*sin(a3);
		6649	return 1;
		6650	}
7614	schaersvoo	6651
		6652	int get_token(FILE *infile){
18589	bpr	6653	int left,milieu,delta,right,c,i=0;
18562	bpr	6654	char temp[MAX_INT], *input_type;
18589	bpr	6655	enum{rien,usefilled,usedashed};
		6656	static struct commande {char *nom; int res; int special;} table[]=
		6657	{
		6658	{"#",COMMENT,0},
		6659	{"affine",AFFINE,0},
		6660	{"allowdups",ALLOW_DUPLICATES,0},
		6661	{"angle",ANGLE,0},
		6662	{"animate",ANIMATE,0},
		6663	{"arc",ARC,0},
		6664	{"arcarrow",ARCARROW,0},
		6665	{"arrow",ARROW,0},
		6666	{"arrow2",ARROW2,0},
		6667	{"arrowarc",ARCARROW,0},
		6668	{"arrowhead",ARROWHEAD,0},
		6669	{"arrows",ARROWS,0},
		6670	{"arrows2",ARROWS2,0},
		6671	{"audio",AUDIO,0},
		6672	{"audioobject",AUDIOOBJECT,0},
		6673	{"axis",AXIS,0},
		6674	{"axisnumbering",AXIS_NUMBERING,0},
		6675	{"axisnumbers",AXIS_NUMBERING,0},
		6676	{"backgroundimage",BGIMAGE,0},
		6677	{"barchart",BARCHART,0},
		6678	{"bezier",BEZIER,0},
		6679	{"bgcolor",BGCOLOR,0},
		6680	{"bgimage",BGIMAGE,0},
		6681	{"blink",BLINK,0},
		6682	{"boxplot",BOXPLOT,0},
		6683	{"boxplotdata",BOXPLOTDATA,0},
		6684	{"brokenline",POLYLINE,0},
		6685	{"canvastype",CANVASTYPE,0},
		6686	{"centered",CENTERED,0},
		6687	{"centerstring",CENTERSTRING,0},
		6688	{"chemtex",CHEMTEX,0},
		6689	{"circle",CIRCLE,0},
		6690	{"circles",CIRCLES,0},
		6691	{"clearbutton",CLEARBUTTON,0},
		6692	{"clicktile",CLICKTILE,0},
		6693	{"clicktile_colors",CLICKTILE_COLORS,0},
		6694	{"clock",CLOCK,0},
		6695	{"colorpalette",COLORPALETTE,0},
		6696	{"colors",MULTISTROKECOLORS,0},
		6697	{"copy",COPY,0},
		6698	{"copyresized",COPYRESIZED,0},
		6699	{"crosshair",CROSSHAIR,0},
		6700	{"crosshairs",CROSSHAIRS,0},
		6701	{"crosshairsize",CROSSHAIRSIZE,0},
		6702	{"css",CSS,0},
		6703	{"cursor",CURSOR,0},
		6704	{"curve",CURVE,0},
		6705	{"curvedarrow",CURVEDARROW,0},
		6706	{"curvedarrow2",CURVEDARROW2,0},
		6707	{"curvedarrows",CURVEDARROWS,0},
		6708	{"curvedarrows2",CURVEDARROWS2,0},
		6709	{"darrow",ARROW,usedashed},
		6710	{"darrow2",ARROW2,usedashed},
		6711	{"dashed",DASHED,0},
		6712	{"dashtype",DASHTYPE,0},
		6713	{"dcurve",CURVE,usedashed},
		6714	{"delete",CLEARBUTTON,0},
		6715	{"demiline",HALFLINE,0},
		6716	{"demilines",HALFLINES,0},
		6717	{"dhline",HLINE,usedashed},
		6718	{"diafill",DIAMONDFILL,0},
		6719	{"diamondfill",DIAMONDFILL,0},
		6720	{"disk",CIRCLE,usefilled},
		6721	{"disks",CIRCLES,usefilled},
		6722	{"display",MOUSE_DISPLAY,0},
		6723	{"dline",LINE,usedashed},
		6724	{"dotfill",DOTFILL,0},
		6725	{"dplot",CURVE,usedashed},
		6726	{"dpolyline",POLYLINE,usedashed},
		6727	{"drag",DRAG,0},
		6728	{"dsegment",SEGMENT,usedashed},
		6729	{"dsegments",SEGMENTS,usedashed},
		6730	{"duplicates",ALLOW_DUPLICATES,0},
		6731	{"dvline",VLINE,usedashed},
		6732	{"ellipse",ELLIPSE,0},
		6733	{"ellipses",ELLIPSES,0},
		6734	{"end",END,0},
		6735	{"erase",CLEARBUTTON,0},
		6736	{"farc",ARC,usefilled},
		6737	{"fcircle",CIRCLE,usefilled},
		6738	{"fcircles",CIRCLES,usefilled},
		6739	{"fellipse",ELLIPSE,usefilled},
		6740	{"fhypcircles",HYPCIRCLES,usefilled},
		6741	{"fill",FLOODFILL,0},
		6742	{"fillall",FILLALL,0},
		6743	{"fillcolor",FILLCOLOR,0},
		6744	{"fillcolors",MULTIFILLCOLORS,0},
		6745	{"filled",FILLED,0},
		6746	{"filledarc",ARC,usefilled},
		6747	{"filledpoly",POLY,usefilled},
		6748	{"filledpolygon",POLY,usefilled},
18608	bpr	6749	{"fillopacity",FILLOPACITY,0},
18589	bpr	6750	{"fillpattern",FILLPATTERN,0},
		6751	{"filltoborder",FILLTOBORDER,0},
		6752	{"floodfill",FLOODFILL,0},
		6753	{"fontcolor",FONTCOLOR,0},
		6754	{"fontfamily",FONTFAMILY,0},
		6755	{"fontsize",FONTSIZE,0},
		6756	{"fpoly",POLY,usefilled},
		6757	{"fpolygon",POLY,usefilled},
		6758	{"frect",RECT,usefilled},
		6759	{"frectangle",RECT,usefilled},
		6760	{"frects",RECTS,usefilled},
		6761	{"froundrect",ROUNDRECT,usefilled},
		6762	{"froundrects",ROUNDRECTS,usefilled},
		6763	{"fsquare",SQUARE,usefilled},
		6764	{"fsquares",RECTS,usefilled},
		6765	{"ftriangle",TRIANGLE,usefilled},
		6766	{"ftriangles",TRIANGLES,usefilled},
		6767	{"functionlabel",FUNCTION_LABEL,0},
		6768	{"functionlabels",FUNCTION_LABEL,0},
		6769	{"grid",GRID,0},
		6770	{"gridfill",GRIDFILL,0},
		6771	{"group",GROUP,0},
		6772	{"halfline",HALFLINE,0},
		6773	{"halflines",HALFLINES,0},
		6774	{"hatchfill",HATCHFILL,0},
		6775	{"highlight",STYLE,0},
		6776	{"hline",HLINE,0},
		6777	{"hlines",HLINES,0},
		6778	{"horizontalline",HLINE,0},
		6779	{"horizontallines",HLINES,0},
		6780	{"html",HTML,0},
		6781	{"http",HTTP,0},
		6782	{"hypcircles",HYPCIRCLES,0},
		6783	{"hyplines",HYPLINES,0},
		6784	{"hyppolygon",HYPPOLY,0},
		6785	{"hyprays",HYPRAYS,0},
		6786	{"hypsegments",HYPSEGMENTS,0},
		6787	{"imagefill",IMAGEFILL,0},
		6788	{"imagepalette",IMAGEPALETTE,0},
		6789	{"input",INPUT,0},
		6790	{"intooltip",INTOOLTIP,0},
		6791	{"jscurve",JSCURVE,0},
		6792	{"jsmath",JSMATH,0},
		6793	{"jsplot",JSCURVE,0},
		6794	{"katex",LATEX,0},
		6795	{"kill",KILL,0},
		6796	{"killaffine",KILLAFFINE,0},
		6797	{"killgroup",KILLSLIDER,0},
		6798	{"killinear",KILLLINEAR,0},
		6799	{"killlinear",KILLLINEAR,0},
		6800	{"killreset",NORESET,0},
		6801	{"killrotate",KILLROTATE,0},
		6802	{"killslider",KILLSLIDER,0},
		6803	{"killtranslate",KILLTRANSLATION,0},
		6804	{"killtranslation",KILLTRANSLATION,0},
		6805	{"latex",LATEX,0},
		6806	{"lattice",LATTICE,0},
		6807	{"legend",LEGEND,0},
		6808	{"legendcolors",LEGENDCOLORS,0},
		6809	{"levelcurve",LEVELCURVE,0},
		6810	{"line",LINE,0},
		6811	{"linear",LINEAR,0},
		6812	{"linegraph",LINEGRAPH,0},
		6813	{"lines",LINES,0},
		6814	{"linewidth",LINEWIDTH,0},
		6815	{"linewidths",MULTILINEWIDTH,0},
		6816	{"math",LATEX,0},
		6817	{"mathml",MATHML,0},
		6818	{"mouse",MOUSE,0},
		6819	{"mousedegree",MOUSE_DEGREE,0},
		6820	{"mouseprecision",MOUSE_PRECISION,0},
		6821	{"mousex",MOUSEX,0},
		6822	{"mousey",MOUSEY,0},
		6823	{"multicolors",MULTISTROKECOLORS,0},
		6824	{"multidash",MULTIDASH,0},
		6825	{"multidraw",MULTIDRAW,0},
		6826	{"multifill",MULTIFILL,0},
		6827	{"multifillcolors",MULTIFILLCOLORS,0},
		6828	{"multifillopacity",MULTIFILLOPACITY,0},
		6829	{"multiinput",MULTIUSERINPUT,0},
		6830	{"multilabel",MULTILABEL,0},
		6831	{"multilinewidth",MULTILINEWIDTH,0},
		6832	{"multisnap",MULTISNAPTOGRID,0},
		6833	{"multisnaptogrid",MULTISNAPTOGRID,0},
		6834	{"multistrokecolors",MULTISTROKECOLORS,0},
		6835	{"multistrokeopacity",MULTISTROKEOPACITY,0},
		6836	{"multiuserinput",MULTIUSERINPUT,0},
		6837	{"newrange",NEWRANGE,0},
		6838	{"noreset",NORESET,0},
		6839	{"nostatus",STATUS,0},
		6840	{"noxaxis",NOXAXIS,0},
		6841	{"noyaxis",NOYAXIS,0},
		6842	{"numberline",NUMBERLINE,0},
		6843	{"obabel",OBABEL,0},
		6844	{"onclick",ONCLICK,0},
		6845	{"opacity",OPACITY,0},
		6846	{"parallel",PARALLEL,0},
		6847	{"path",POLYLINE,0},
		6848	{"patternfill",PATTERNFILL,0},
		6849	{"piechart",PIECHART,0},
		6850	{"pixels",PIXELS,0},
		6851	{"pixelsize",PIXELSIZE,0},
		6852	{"plot",CURVE,0},
		6853	{"plotstep",PLOTSTEPS,0},
		6854	{"plotsteps",PLOTSTEPS,0},
		6855	{"point",POINT,0},
		6856	{"pointer",CURSOR,0},
		6857	{"points",POINTS,0},
		6858	{"poly",POLY,0},
		6859	{"polygon",POLY,0},
		6860	{"polyline",POLYLINE,0},
		6861	{"popup",POPUP,0},
		6862	{"precision",MOUSE_PRECISION,0},
		6863	{"protractor",PROTRACTOR,0},
		6864	{"range",RANGE,0},
		6865	{"ranget",TRANGE,0},
		6866	{"rangex",XRANGE,0},
		6867	{"rangey",YRANGE,0},
		6868	{"rays",RAYS,0},
		6869	{"rect",RECT,0},
		6870	{"rectangle",RECT,0},
		6871	{"rects",RECTS,0},
		6872	{"replyformat",REPLYFORMAT,0},
		6873	{"reset",RESET,0},
		6874	{"resetoffset",RESETOFFSET,0},
		6875	{"rotate",ROTATE,0},
		6876	{"rotationcenter",ROTATION_CENTER,0},
		6877	{"roundrect",ROUNDRECT,0},
		6878	{"roundrectangle",ROUNDRECT,0},
		6879	{"roundrects",ROUNDRECTS,0},
		6880	{"ruler",RULER,0},
		6881	{"seg",SEGMENT,0},
		6882	{"segment",SEGMENT,0},
		6883	{"segments",SEGMENTS,0},
		6884	{"segs",SEGMENTS,0},
		6885	{"setlimits",SETLIMITS,0},
		6886	{"setpixel",SETPIXEL,0},
		6887	{"settile",FILLPATTERN,0},
		6888	{"sgraph",SGRAPH,0},
		6889	{"size",SIZE,0},
		6890	{"slider",SLIDER,0},
		6891	{"snaptofun",SNAPTOFUNCTION,0},
		6892	{"snaptofunction",SNAPTOFUNCTION,0},
		6893	{"snaptogrid",SNAPTOGRID,0},
		6894	{"snaptopoints",SNAPTOPOINTS,0},
		6895	{"square",SQUARE,0},
		6896	{"status",STATUS,0},
		6897	{"string",STRING,0},
		6898	{"stringup",STRINGUP,0},
		6899	{"strokecolor",STROKECOLOR,0},
		6900	{"strokecolors",MULTISTROKECOLORS,0},
18608	bpr	6901	{"strokeopacity",STROKEOPACITY,0},
18589	bpr	6902	{"style",STYLE,0},
		6903	{"text",FLY_TEXT,0},
		6904	{"textarea",TEXTAREA,0},
		6905	{"textfill",TEXTFILL,0},
		6906	{"textup",FLY_TEXTUP,0},
		6907	{"title",CENTERSTRING,0},
		6908	{"trace_jscurve",TRACE_JSCURVE,0},
		6909	{"trange",TRANGE,0},
		6910	{"translate",TRANSLATION,0},
		6911	{"translation",TRANSLATION,0},
		6912	{"transparent",OPACITY,0},
		6913	{"triangle",TRIANGLE,0},
		6914	{"triangles",TRIANGLES,0},
		6915	{"tsteps",PLOTSTEPS,0},
		6916	{"userboxplot",USERBOXPLOT,0},
		6917	{"userboxplotdata",USERBOXPLOT,0},
		6918	{"userdraw",USERDRAW,0},
		6919	{"userinput",USERINPUT,0},
		6920	{"userinput_function",USERINPUT_FUNCTION,0},
		6921	{"userinput_xy",USERINPUT_XY,0},
		6922	{"vector",ARROW,0},
		6923	{"vectors",ARROWS,0},
		6924	{"verticalline",VLINE,0},
		6925	{"verticallines",VLINES,0},
		6926	{"video",VIDEO,0},
		6927	{"vline",VLINE,0},
		6928	{"vlines",VLINES,0},
		6929	{"xaxis",X_AXIS_STRINGS,0},
		6930	{"xaxistext",X_AXIS_STRINGS,0},
		6931	{"xaxistextup",X_AXIS_STRINGS_UP,0},
		6932	{"xaxisup",X_AXIS_STRINGS_UP,0},
		6933	{"xerrorbars",XERRORBARS,0},
		6934	{"xlabel",XLABEL,0},
		6935	{"xlogbase",XLOGBASE,0},
		6936	{"xlogscale",XLOGSCALE,0},
		6937	{"xoffset",XOFFSET,0},
		6938	{"xrange",XRANGE,0},
		6939	{"xsnaptogrid",XSNAPTOGRID,0},
		6940	{"xunit",XUNIT,0},
		6941	{"xylogscale",XYLOGSCALE,0},
		6942	{"xyoffset",XYOFFSET,0},
		6943	{"yaxis",Y_AXIS_STRINGS,0},
		6944	{"yaxistext",Y_AXIS_STRINGS,0},
		6945	{"yerrorbars",YERRORBARS,0},
		6946	{"ylabel",YLABEL,0},
		6947	{"ylogbase",YLOGBASE,0},
		6948	{"ylogscale",YLOGSCALE,0},
		6949	{"yoffset",YOFFSET,0},
		6950	{"yrange",YRANGE,0},
		6951	{"ysnaptogrid",YSNAPTOGRID,0},
		6952	{"yunit",YUNIT,0},
		6953	{"zoom",ZOOM,0}
		6954	};
7614	schaersvoo	6955
18552	bpr	6956	while(((c = getc(infile)) != EOF)&&(c!='\n')&&(c!=',')&&(c!='=')&&(c!='\r')&&(c!='\t')){
		6957	if( i == 0 && (c == ' ') ){ continue; /* white spaces or tabs allowed before first command identifier */
		6958	}else{
		6959	if( c == ' ' ){
		6960	break;
		6961	}else{
		6962	temp[i] = c;
		6963	if(i > MAX_INT - 2){canvas_error("command string too long !");}
		6964	i++;
		6965	}
		6966	}
		6967	if(temp[0] == '#'){ break; }
		6968	}
		6969	if (c == '\n' \|\| c == '\r' \|\| c == '\t' ){ line_number++; }
		6970	if (c == EOF) {finished=1;return 0;}
7614	schaersvoo	6971
18552	bpr	6972	temp[i]='\0';
		6973	if(strstr(temp,"dash") !=0 && strlen(temp) > 4 && strstr(temp,"dashtype") == 0 ){
		6974	/* 4/2024 adapt to Flydraw's dashing syntax for all objects with prefix "dash" */
		6975	use_dashed = TRUE;int idx=0;int p;
		6976	for( p = 4; p < strlen(temp); p++){temp[idx] = temp[p];idx++;}
		6977	input_type = (char*)my_newmem(idx); snprintf(input_type,idx+1,"%s",temp);
		6978	}else{
		6979	input_type=(char*)my_newmem(strlen(temp));
		6980	snprintf(input_type,sizeof(temp),"%s",temp);
		6981	}
18572	bpr	6982	/* fprintf(stdout,"input_type = %s no_reset = %d <br>",input_type,no_reset);*/
18589	bpr	6983
		6984	left=0; right=sizeof(table)/sizeof(struct commande);
		6985	while (left<right){
		6986	milieu = (left+right)/2;
		6987	delta = strcmp(input_type, table[milieu].nom);
		6988	if (delta == 0){
		6989	free(input_type);
		6990	if (table[milieu].special==usefilled) use_filled=TRUE;
		6991	if (table[milieu].special==usedashed) use_dashed=TRUE;
		6992	return table[milieu].res;
		6993	}
		6994	if (delta<0) right=milieu; else left=milieu+1;
18552	bpr	6995	}
		6996	free(input_type);
18562	bpr	6997	ungetc(c,infile);
		6998	return 0;
7614	schaersvoo	6999	}

Subversion Repositories wimsdev

(root)/trunk/wims/src/Misc/canvasdraw/canvasdraw.c – Rev 18609