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| Line 180... | Line 180... | ||
| 180 | type = get_token(infile); |
180 | type = get_token(infile); |
| 181 | done = FALSE; |
181 | done = FALSE; |
| 182 | /* |
182 | /* |
| 183 | @canvasdraw |
183 | @canvasdraw |
| 184 | @will try use the same syntax as flydraw or svgdraw 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...) |
184 | @will try use the same syntax as flydraw or svgdraw 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...) |
| 185 | @General syntax <ul><li>The transparency of all objects can be controlled by command 'opacity [0-255],[0,255]'</il><li>a line based object can be controlled by command 'linewidth int'</li><li>a line based object may be dashed by using keyword 'dashed' before the object command.<br />the dashing type can be controled by command 'dashtype int,int'</li> |
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| 186 | <li>a |
185 | @General syntax <ul><li>The transparency of all objects can be controlled by command 'opacity [0-255],[0,255]'</il><li>a line based object can be controlled by command 'linewidth int'</li><li>a line based object may be dashed by using keyword 'dashed' before the object command.<br />the dashing type can be controled by command 'dashtype int,int'</li><li>a fillable object can be set fillable by starting the object command with an 'f'<br />(like frect,fcircle,ftriangle...)<br />or by using the keyword 'filled' before the object command.<br />The fill colour will be the stroke colour...(19/10/2013)<li> a draggable object can be set draggable by a preceding command 'drag x/y/xy'<br />The translation can be read by javascript:read_dragdrop();<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 zoom and will be translated in case of panning</li><li> a 'onclick object' can be set 'clickable' by the preceding keyword 'onclick'<br />not all flydraw objects can be set clickable</li><li><b>remarks using a ';' as command separator</b><br />commands with only numeric or colour arguments may be using a ';' as command separator (in stead of a new line)<br />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.<br />example:<br />size 200,200;xrange -5,5;yrange -5,5;hline 0,0,black;vline 0,0,black<br />plot red,sin(x)<br />drag xy<br />html 0,0,5,-5, € <br />lines green,2,0,2,-2,-2,2,-2,0;rectangle 1,1,4,4,purple;frectangle -1,-1,-4,-4,yellow</li></ul> |
| 187 | */ |
186 | */ |
| 188 | switch(type){ |
187 | switch(type){ |
| 189 | case END: |
188 | case END: |
| 190 | finished = 1; |
189 | finished = 1; |
| 191 | done = TRUE; |
190 | done = TRUE; |
| Line 2773... | Line 2772... | ||
| 2773 | } |
2772 | } |
| 2774 | 2773 | ||
| 2775 | char *get_color(FILE *infile , int last){ |
2774 | char *get_color(FILE *infile , int last){ |
| 2776 | int c,i = 0,is_hex = 0; |
2775 | int c,i = 0,is_hex = 0; |
| 2777 | char temp[MAX_COLOR_STRING], *string; |
2776 | char temp[MAX_COLOR_STRING], *string; |
| 2778 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',' ) |
2777 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',' ) && ( c != ';' ) ){ |
| 2779 | if( i > MAX_COLOR_STRING ){ canvas_error("colour string is too big ... ? ");} |
2778 | if( i > MAX_COLOR_STRING ){ canvas_error("colour string is too big ... ? ");} |
| 2780 | if( c == '#' ){ |
2779 | if( c == '#' ){ |
| 2781 | is_hex = 1; |
2780 | is_hex = 1; |
| 2782 | } |
2781 | } |
| 2783 | if( c != ' '){ |
2782 | if( c != ' '){ |
| 2784 | temp[i]=tolower(c); |
2783 | temp[i]=tolower(c); |
| 2785 | i++; |
2784 | i++; |
| 2786 | } |
2785 | } |
| 2787 | } |
2786 | } |
| 2788 | if( ( c == '\n' || c == EOF || c == ';' ) && last == 0){canvas_error("expecting more arguments in command");} |
2787 | if( ( c == '\n' || c == EOF || c == ';' ) && last == 0){canvas_error("expecting more arguments in command");} |
| 2789 | if( c == '\n' || c == ';'){ done = TRUE; line_number++; } |
2788 | if( c == '\n' || c == ';' ){ done = TRUE; line_number++; } |
| 2790 | if( c == EOF ){finished = 1;} |
2789 | if( c == EOF ){finished = 1;} |
| 2791 | if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");} |
2790 | if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");} |
| 2792 | temp[i]='\0'; |
2791 | temp[i]='\0'; |
| 2793 | if( strlen(temp) == 0 ){ canvas_error("expected a colorname or hexnumber, but found nothing !!");} |
2792 | if( strlen(temp) == 0 ){ canvas_error("expected a colorname or hexnumber, but found nothing !!");} |
| 2794 | if( is_hex == 1 ){ |
2793 | if( is_hex == 1 ){ |
| Line 2820... | Line 2819... | ||
| 2820 | } |
2819 | } |
| 2821 | 2820 | ||
| 2822 | char *get_string(FILE *infile,int last){ /* last = 0 : more arguments ; last=1 final argument */ |
2821 | char *get_string(FILE *infile,int last){ /* last = 0 : more arguments ; last=1 final argument */ |
| 2823 | int c,i=0; |
2822 | int c,i=0; |
| 2824 | char temp[MAX_BUFFER], *string; |
2823 | char temp[MAX_BUFFER], *string; |
| 2825 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') |
2824 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') ){ |
| 2826 | temp[i]=c; |
2825 | temp[i]=c; |
| 2827 | i++; |
2826 | i++; |
| 2828 | if(i > MAX_BUFFER){ canvas_error("string size too big...repeat command to fit string");break;} |
2827 | if(i > MAX_BUFFER){ canvas_error("string size too big...repeat command to fit string");break;} |
| 2829 | } |
2828 | } |
| 2830 | if( ( c == '\n' || c == EOF |
2829 | if( ( c == '\n' || c == EOF ) && last == 0){canvas_error("expecting more arguments in command");} |
| 2831 | if( c == '\n |
2830 | if( c == '\n') { done = TRUE; line_number++; } |
| 2832 | if( c == EOF ) { |
2831 | if( c == EOF ) { |
| 2833 | finished = 1; |
2832 | finished = 1; |
| 2834 | if( last != 1 ){ canvas_error("expected more arguments");} |
2833 | if( last != 1 ){ canvas_error("expected more arguments");} |
| 2835 | } |
2834 | } |
| 2836 | temp[i]='\0'; |
2835 | temp[i]='\0'; |
| 2837 | if( strlen(temp) == 0 ){ canvas_error("expected a word or string, but found nothing !!");} |
2836 | if( strlen(temp) == 0 ){ canvas_error("expected a word or string, but found nothing !!");} |
| 2838 | string=(char *)my_newmem(strlen(temp)); |
2837 | string=(char *)my_newmem(strlen(temp)); |
| 2839 | snprintf(string,sizeof(temp),"%s",temp); |
2838 | snprintf(string,sizeof(temp),"%s",temp); |
| 2840 | return string; |
2839 | return string; |
| 2841 | } |
2840 | } |
| 2842 | 2841 | ||
| 2843 | char *get_string_argument(FILE *infile,int last){ /* last = 0 : more arguments ; last=1 final argument */ |
2842 | char *get_string_argument(FILE *infile,int last){ /* last = 0 : more arguments ; last=1 final argument */ |
| 2844 | int c,i=0; |
2843 | int c,i=0; |
| 2845 | char temp[MAX_BUFFER], *string; |
2844 | char temp[MAX_BUFFER], *string; |
| 2846 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',' |
2845 | while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',')){ |
| 2847 | temp[i]=c; |
2846 | temp[i]=c; |
| 2848 | i++; |
2847 | i++; |
| 2849 | if(i > MAX_BUFFER){ canvas_error("string size too big...will cut it off");break;} |
2848 | if(i > MAX_BUFFER){ canvas_error("string size too big...will cut it off");break;} |
| 2850 | } |
2849 | } |
| 2851 | if( ( c == '\n' || c == EOF |
2850 | if( ( c == '\n' || c == EOF) && last == 0){canvas_error("expecting more arguments in command");} |
| 2852 | if( c == '\n |
2851 | if( c == '\n') { line_number++; } |
| 2853 | if( c == EOF ) {finished = 1;} |
2852 | if( c == EOF ) {finished = 1;} |
| 2854 | if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");} |
2853 | if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");} |
| 2855 | temp[i]='\0'; |
2854 | temp[i]='\0'; |
| 2856 | if( strlen(temp) == 0 ){ canvas_error("expected a word or string (without comma) , but found nothing !!");} |
2855 | if( strlen(temp) == 0 ){ canvas_error("expected a word or string (without comma) , but found nothing !!");} |
| 2857 | string=(char *)my_newmem(sizeof(temp)); |
2856 | string=(char *)my_newmem(sizeof(temp)); |
| Line 2969... | Line 2968... | ||
| 2969 | { |
2968 | { |
| 2970 | return y2px( dx );/* convert to pixels according yrange */ |
2969 | return y2px( dx );/* convert to pixels according yrange */ |
| 2971 | } |
2970 | } |
| 2972 | } |
2971 | } |
| 2973 | void canvas_error(char *msg){ |
2972 | void canvas_error(char *msg){ |
| 2974 | fprintf(stdout,"\n</script><hr /><span style=\"color:red\">FATAL syntax error:line %d : %s</span><hr />",line_number,msg); |
2973 | fprintf(stdout,"\n</script><hr /><span style=\"color:red\">FATAL syntax error:line %d : %s</span><hr />",line_number-1,msg); |
| 2975 | finished = 1; |
2974 | finished = 1; |
| 2976 | exit(EXIT_SUCCESS); |
2975 | exit(EXIT_SUCCESS); |
| 2977 | } |
2976 | } |
| 2978 | 2977 | ||
| 2979 | 2978 | ||