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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3653 | schaersvoo | 1 | /* jm.evers 10/2009 |
| 2 | |||
| 3 | This is just a copy of Parametric.java ; added a param "showAll" |
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| 4 | <param name="showAll" value="0/no"> will show the graph and no input controls |
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| 5 | Any other values will revert to Parametric.java behaviour. |
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| 6 | |||
| 7 | The evalues used to generate the parametric figure are however |
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| 8 | still easy to be read by pupils looking at the page source... |
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| 9 | |||
| 10 | example: |
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| 11 | <html> |
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| 12 | <body> |
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| 13 | <applet archive="./jcm.jar" code="SilentParametric.class" width="640" height="360"> |
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| 14 | <param name="showAll" value="no"><!-- yes will give user inputs --> |
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| 15 | <param name="FrameTitle" value="Parametric Curves"> |
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| 16 | <param name="UseGrid" value="yes"> |
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| 17 | <param name="Limits" value="-1.5,1.5,-1.5,1.5"> |
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| 18 | <param name="UseMouseZoom" value="no"> |
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| 19 | <param name="UsePanner" value="no"> |
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| 20 | <param name="UseFunctionInput" value="no"> |
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| 21 | <param name="UseParamInputs" value="no"> |
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| 22 | <param name="UseRestoreButton" value="yes"> |
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| 23 | <param name="UseEqualizeButton" value="yes"> |
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| 24 | <param name="SetLimitsButton" value="yes"> |
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| 25 | <param name="UseZoomButtons" value="yes"> |
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| 26 | |||
| 27 | <param name="LoopStyle" value="2"><!-- 0,1,2 0=once,1=restart,2=back and forth--> |
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| 28 | <param name="File" value="http://localhost/test.data"> |
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| 29 | <!-- |
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| 30 | or define functions through params: |
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| 31 | <param name="Function" value="sin(1/2*t)"> |
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| 32 | <param name="Function2" value="sin(2*t)"> |
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| 33 | --> |
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| 34 | <param name="FunctionLabel" value="x(t)"> |
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| 35 | <param name="FunctionLabel2" value="y(t)"> |
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| 36 | <param name="TracerIntervals" value="150"> |
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| 37 | <param name="ParameterMin" value="0"> |
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| 38 | <param name="ParameterMax" value="2*pi/(1/2)"> |
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| 39 | <param name="PanelBackground" value="255 235 245"> |
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| 40 | <param name="UseComputeButton" value="no"> |
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| 41 | <param name="TwoLimitsColumns" value="no"> |
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| 42 | <param name="UseLimitsPanel" value="no"> |
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| 43 | <param namr="Insets" value="no"> |
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| 44 | <param name="BackgroundColor" value="255 235 245"> |
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| 45 | </applet> |
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| 46 | </body> |
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| 47 | </html> |
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| 48 | */ |
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| 49 | |||
| 50 | /************************************************************************* |
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| 51 | * * |
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| 52 | * This source code file, and compiled classes derived from it, can * |
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| 53 | * be used and distributed without restriction, including for commercial * |
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| 54 | * use. (Attribution is not required but is appreciated.) * |
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| 55 | * * |
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| 56 | * David J. Eck * |
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| 57 | * Department of Mathematics and Computer Science * |
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| 58 | * Hobart and William Smith Colleges * |
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| 59 | * Geneva, New York 14456, USA * |
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| 60 | * Email: eck@hws.edu WWW: http://math.hws.edu/eck/ * |
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| 61 | * * |
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| 62 | *************************************************************************/ |
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| 63 | |||
| 64 | |||
| 65 | // The ParametricCurve applet is a configurable applet that displays a parametric |
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| 66 | // curve defined by two functions of a parameter t. There can be a "Tracer" button |
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| 67 | // on the applet. When the user clicks this button, a crosshair is moved along |
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| 68 | // the curve from beginning to end. |
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| 69 | |||
| 70 | import java.awt.*; |
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| 71 | import java.applet.Applet; |
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| 72 | import java.util.StringTokenizer; |
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| 73 | import java.util.Hashtable; |
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| 74 | import edu.hws.jcm.draw.*; |
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| 75 | import edu.hws.jcm.data.*; |
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| 76 | import edu.hws.jcm.functions.*; |
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| 77 | import edu.hws.jcm.awt.*; |
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| 78 | import java.net.*; |
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| 79 | import java.io.*; |
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| 80 | |||
| 81 | |||
| 82 | public class SilentParametric extends GenericGraphApplet { |
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| 83 | |||
| 84 | // Declare some private variables that are created in one method in |
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| 85 | // this class and used in a second method. |
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| 86 | |||
| 87 | private Function xFunc,yFunc; // The functions that are graphed. |
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| 88 | private ParametricCurve graph; // The graph of the function. |
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| 89 | private Animator tracer; // for tracing the curve by moving a crosshair along it |
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| 90 | private Crosshair crosshair; // Crosshair used for tracing the graph |
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| 91 | private VariableInput tMin,tMax; // for inputting limits on t |
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| 92 | private VariableInput tIntervals; // for inutting the number of intervals into which the t-range is divided |
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| 93 | private ExpressionInput functionInput2; // for inputting yFunc; xFunc is input in functionInput |
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| 94 | public String tMaxString="2"; |
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| 95 | public String tMinString="-2"; |
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| 96 | |||
| 97 | protected void setUpParameterDefaults() { |
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| 98 | parameterDefaults = new Hashtable(); |
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| 99 | parameterDefaults.put("TwoLimitsColumns", "yes"); |
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| 100 | parameterDefaults.put("Variable","t"); |
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| 101 | parameterDefaults.put("XName","x"); // we need this so that xmin and xmax boxes are labeled correctly; |
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| 102 | // without it, the name would come from the variable name, t, instead of x |
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| 103 | parameterDefaults.put("FunctionLabel", " " + getParameter("XName") + "(" + getParameter("Variable") + ") = "); |
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| 104 | parameterDefaults.put("FunctionLabel2", " " + getParameter("YName","y") + "(" + getParameter("Variable") + ") = "); |
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| 105 | } |
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| 106 | |||
| 107 | protected void setUpCanvas() { // Override this to add more stuff to the canvas. |
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| 108 | |||
| 109 | super.setUpCanvas(); // Do the common setup: Add the axes and |
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| 110 | |||
| 111 | // When setUpCanvas is called, the function inputs already exist, if they are |
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| 112 | // to be used, since they are created in setUpBopttomPanel(), which is called |
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| 113 | // before setUpCanvas(). If functionInput exists, add a graph of the functions |
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| 114 | // from functionInput and functionInput2 to the canvas. If not, create a graph |
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| 115 | // of the functions specified by the parameters named "Function" and "Function2". |
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| 116 | |||
| 117 | if (functionInput != null) { |
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| 118 | xFunc = functionInput.getFunction(xVar); |
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| 119 | yFunc = functionInput2.getFunction(xVar); |
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| 120 | } |
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| 121 | else { |
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| 122 | String xFuncDef = " cos(" + xVar.getName() + ") + cos(3*" + xVar.getName() + ")"; |
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| 123 | String yFuncDef = " sin(4*" + xVar.getName() + ") - sin(2*" + xVar.getName() + ")"; |
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| 124 | String file = getParameter("File"); |
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| 125 | // jm.evers begin |
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| 126 | if(file != null){ |
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| 127 | //System.out.println("fetching data from "+file); |
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| 128 | String newdata=""; |
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| 129 | try{ newdata = load(file); |
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| 130 | // scheme: function1,function2,min,max |
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| 131 | StringTokenizer t = new StringTokenizer(newdata, ","); |
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| 132 | if(t.countTokens() != 4) {System.out.println("scheme is: function1,function2,min,max");} |
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| 133 | else { |
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| 134 | xFuncDef = t.nextToken(); |
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| 135 | yFuncDef = t.nextToken(); |
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| 136 | tMinString = t.nextToken(); |
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| 137 | tMaxString = t.nextToken(); |
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| 138 | } |
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| 139 | } catch(Exception e){System.out.println("Could not read data from "+file);} |
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| 140 | } |
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| 141 | else |
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| 142 | { |
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| 143 | xFuncDef = getParameter("Function", xFuncDef); |
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| 144 | yFuncDef = getParameter("Function2", yFuncDef); |
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| 145 | } |
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| 146 | // jm.evers end |
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| 147 | Function f = new SimpleFunction( parser.parse(xFuncDef), xVar ); |
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| 148 | xFunc = new WrapperFunction(f); |
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| 149 | f = new SimpleFunction( parser.parse(yFuncDef), xVar ); |
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| 150 | yFunc = new WrapperFunction(f); |
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| 151 | } |
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| 152 | graph = new ParametricCurve(xFunc,yFunc); |
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| 153 | Color color = getColorParam("CurveColor"); |
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| 154 | if (color != null) |
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| 155 | graph.setColor(color); |
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| 156 | |||
| 157 | // if inputs are desired to control the parameter on the curve, set them up here |
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| 158 | |||
| 159 | if ("no".equalsIgnoreCase(getParameter("UseParamInputs","yes"))) { |
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| 160 | tMin = new VariableInput(xVar.getName() + "Start",tMinString); |
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| 161 | tMax = new VariableInput(xVar.getName() + "End",tMaxString); |
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| 162 | tIntervals = new VariableInput("Intervals", getParameter("Intervals","500")); |
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| 163 | tIntervals.setInputStyle(VariableInput.INTEGER); |
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| 164 | tIntervals.setMin(1); |
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| 165 | tIntervals.setMax(5000); |
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| 166 | tMin.setOnUserAction(mainController); |
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| 167 | tMax.setOnUserAction(mainController); |
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| 168 | tIntervals.setOnUserAction(mainController); |
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| 169 | graph.setTMin(tMin); |
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| 170 | graph.setTMax(tMax); |
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| 171 | graph.setIntervals(tIntervals); |
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| 172 | // jm.evers begin |
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| 173 | String s = getParameter("showAll"); |
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| 174 | boolean showAll=true; |
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| 175 | if(s.equalsIgnoreCase("no") || s.equalsIgnoreCase("0")){showAll=false;} |
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| 176 | // jm.evers end |
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| 177 | if(showAll){ |
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| 178 | if (limitsPanel != null) { |
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| 179 | // componets will be added to limitsPanel in setUpLimitsPanel() |
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| 180 | mainController.add(tMin); // This is not done automatically, since they are in a limits panel |
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| 181 | mainController.add(tMax); |
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| 182 | mainController.add(tIntervals); |
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| 183 | } |
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| 184 | else { |
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| 185 | JCMPanel ap = new JCMPanel(9,0); |
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| 186 | ap.setBackground(getColorParam("PanelBackground", Color.lightGray)); |
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| 187 | ap.add(new Label(tMin.getName())); |
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| 188 | ap.add(tMin); |
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| 189 | ap.add(new Label()); |
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| 190 | ap.add(new Label(tMax.getName())); |
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| 191 | ap.add(tMax); |
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| 192 | ap.add(new Label()); |
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| 193 | ap.add(new Label(tIntervals.getName())); |
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| 194 | ap.add(tIntervals); |
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| 195 | ap.add(new Label()); |
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| 196 | mainPanel.add(ap,BorderLayout.EAST); |
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| 197 | } |
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| 198 | } |
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| 199 | } |
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| 200 | else { |
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| 201 | try { |
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| 202 | graph.setTMin( new Constant((new Double(tMinString)).doubleValue()) ); |
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| 203 | graph.setTMax( new Constant((new Double(tMaxString)).doubleValue()) ); |
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| 204 | graph.setIntervals( new Constant((new Double(getParameter("Intervals","500"))).doubleValue()) ); |
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| 205 | } |
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| 206 | catch (NumberFormatException e) { |
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| 207 | } |
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| 208 | } |
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| 209 | |||
| 210 | // If the applet is configured to have a tracer button, create it and add the crosshair to the canvas |
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| 211 | |||
| 212 | if (! "no".equalsIgnoreCase( getParameter("UseTracer","yes") ) ) { |
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| 213 | tracer = new Animator(); |
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| 214 | String loopstyle=getParameter("LoopStyle"); |
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| 215 | if(loopstyle != null){ |
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| 216 | if(loopstyle.equals("0")){tracer.setLoopStyle(0);} |
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| 217 | else |
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| 218 | if(loopstyle.equals("1")){tracer.setLoopStyle(1);} |
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| 219 | else |
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| 220 | if(loopstyle.equals("2")){tracer.setLoopStyle(2);} |
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| 221 | else |
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| 222 | tracer.setLoopStyle(2); |
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| 223 | } |
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| 224 | tracer.setMin(graph.getTMin()); |
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| 225 | tracer.setMax(graph.getTMax()); |
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| 226 | tracer.setUndefinedWhenNotRunning(true); |
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| 227 | tracer.setStartButtonName("Trace Curve!"); |
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| 228 | double[] d = getNumericParam("TracerIntervals"); |
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| 229 | int ints; |
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| 230 | if (d == null || d.length != 1) |
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| 231 | ints = 100; |
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| 232 | else |
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| 233 | ints = (int)Math.round(d[0]); |
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| 234 | if (ints <= 0) |
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| 235 | tracer.setIntervals(graph.getIntervals()); |
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| 236 | else |
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| 237 | tracer.setIntervals(ints); |
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| 238 | Variable v = tracer.getValueAsVariable(); |
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| 239 | crosshair = new Crosshair( new ValueMath(xFunc,v), new ValueMath(yFunc,v) ); |
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| 240 | crosshair.setLineWidth(3); |
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| 241 | crosshair.setColor(getColorParam("CrosshairColor",Color.gray)); |
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| 242 | canvas.add(crosshair); |
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| 243 | |||
| 244 | if (inputPanel != null) { |
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| 245 | inputPanel.add(tracer,BorderLayout.WEST); |
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| 246 | } |
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| 247 | else if (limitsPanel == null) { |
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| 248 | Panel p = new Panel(); |
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| 249 | p.add(tracer); |
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| 250 | mainPanel.add(p,BorderLayout.SOUTH); |
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| 251 | } |
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| 252 | // if inputPanel is null but limitsPanel is not null, the tracer will be |
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| 253 | // added to the limit control panel in setUpLimitsPanel() |
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| 254 | } |
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| 255 | |||
| 256 | canvas.add(graph); // Finally, add the graph to the canvas. |
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| 257 | |||
| 258 | } // end setUpCanvas() |
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| 259 | |||
| 260 | |||
| 261 | protected void setUpLimitsPanel() { |
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| 262 | super.setUpLimitsPanel(); |
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| 263 | if (limitsPanel != null && tMin != null) { // add parameter inputs to limits panel |
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| 264 | limitsPanel.addComponentPair(tMin,tMax); |
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| 265 | limitsPanel.addComponent(tIntervals); |
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| 266 | } |
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| 267 | if (inputPanel == null && tracer != null && limitsPanel != null) { |
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| 268 | limitsPanel.addComponent(tracer); |
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| 269 | } |
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| 270 | } |
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| 271 | |||
| 272 | |||
| 273 | protected void setUpBottomPanel() { // override this to make a panel containing inputs for two functions |
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| 274 | if ( ! "no".equalsIgnoreCase(getParameter("UseFunctionInput", "yes")) ) { |
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| 275 | |||
| 276 | inputPanel = new JCMPanel(); |
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| 277 | inputPanel.setBackground( getColorParam("PanelBackground", Color.lightGray) ); |
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| 278 | Panel in = new JCMPanel(2,1); |
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| 279 | inputPanel.add(in,BorderLayout.CENTER); |
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| 280 | |||
| 281 | if ( ! "no".equalsIgnoreCase(getParameter("UseComputeButton", "yes")) ) { |
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| 282 | String cname = getParameter("ComputeButtonName", "New Functions"); |
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| 283 | computeButton = new Button(cname); |
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| 284 | inputPanel.add(computeButton, BorderLayout.EAST); |
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| 285 | computeButton.addActionListener(this); |
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| 286 | } |
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| 287 | |||
| 288 | String varName = getParameter("Variable"); |
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| 289 | String def = getParameter("Function"); |
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| 290 | if (def == null) |
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| 291 | def = "cos(" + varName + ") + cos(3*" + varName + ")"; |
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| 292 | functionInput = new ExpressionInput(def,parser); |
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| 293 | String label = getParameter("FunctionLabel"); |
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| 294 | if ("none".equalsIgnoreCase(label)) |
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| 295 | in.add(functionInput); |
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| 296 | else { |
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| 297 | Panel p = new JCMPanel(); |
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| 298 | p.add(functionInput,BorderLayout.CENTER); |
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| 299 | p.add( new Label(label), BorderLayout.WEST ); |
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| 300 | in.add(p); |
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| 301 | } |
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| 302 | |||
| 303 | def = getParameter("Function2"); |
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| 304 | if (def == null) |
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| 305 | def = "sin(4*" + varName + ") - sin(2*" + varName + ")"; |
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| 306 | functionInput2 = new ExpressionInput(def,parser); |
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| 307 | label = getParameter("FunctionLabel2"); |
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| 308 | if ("none".equalsIgnoreCase(label)) |
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| 309 | in.add(functionInput2); |
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| 310 | else { |
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| 311 | Panel p = new JCMPanel(); |
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| 312 | p.add(functionInput2,BorderLayout.CENTER); |
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| 313 | p.add( new Label(label), BorderLayout.WEST ); |
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| 314 | in.add(p); |
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| 315 | } |
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| 316 | |||
| 317 | mainPanel.add(inputPanel, BorderLayout.SOUTH); |
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| 318 | functionInput.setOnUserAction(mainController); |
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| 319 | functionInput2.setOnUserAction(mainController); |
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| 320 | } |
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| 321 | } |
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| 322 | |||
| 323 | |||
| 324 | protected void setUpMainPanel() { // Override to set up controller for tracer, if there is one |
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| 325 | |||
| 326 | super.setUpMainPanel(); // Do the common setup |
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| 327 | |||
| 328 | if ( tracer == null ) { |
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| 329 | return; // If the applet is not configured to use a trace button, there is nothing to do. |
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| 330 | } |
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| 331 | |||
| 332 | Controller traceController = new Controller(); // A controler that will only recompute the crosshair position |
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| 333 | traceController.add(tracer); |
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| 334 | traceController.add(crosshair); |
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| 335 | tracer.setOnChange(traceController); |
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| 336 | |||
| 337 | } // end setUpMainPanel() |
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| 338 | |||
| 339 | protected void doLoadExample(String example) { |
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| 340 | // This method is called when the user loads an example from the |
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| 341 | // example menu (if there is one). It overrides an empty method |
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| 342 | // in GenericGraphApplet. |
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| 343 | // For the Parametric applet, the example string should contain |
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| 344 | // two expression that defines the curve to be graphed, separated |
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| 345 | // by a semicolon. This can optionally |
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| 346 | // be followed by another semicolon and a list of four to seven numbers. |
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| 347 | // The first four numbers give the x- and y-limits to be used for the |
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| 348 | // example. If they are not present, then -5,5,-5,5 is used. The |
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| 349 | // next three numbers specify the minimum value for the parameter, the |
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| 350 | // maximum value, and the number of intervals into which the range of |
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| 351 | // parameter values is divided. |
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| 352 | |||
| 353 | if (tracer != null) |
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| 354 | tracer.stop(); |
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| 355 | |||
| 356 | int pos = example.indexOf(";"); |
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| 357 | if (pos == -1) |
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| 358 | return; // illegal example -- must have two functions |
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| 359 | String example2 = example.substring(pos+1); |
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| 360 | example = example.substring(0,pos); |
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| 361 | pos = example2.indexOf(";"); |
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| 362 | |||
| 363 | |||
| 364 | double[] limits = { -5,5,-5,5 }; // x- and y-limits to use |
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| 365 | |||
| 366 | if (pos > 0) { |
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| 367 | // Get limits from example2 text. |
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| 368 | String nums = example2.substring(pos+1); |
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| 369 | example2 = example2.substring(0,pos); |
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| 370 | StringTokenizer toks = new StringTokenizer(nums, " ,"); |
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| 371 | if (toks.countTokens() >= 4) { |
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| 372 | for (int i = 0; i < 4; i++) { |
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| 373 | try { |
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| 374 | Double d = new Double(toks.nextToken()); |
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| 375 | limits[i] = d.doubleValue(); |
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| 376 | } |
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| 377 | catch (NumberFormatException e) { |
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| 378 | } |
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| 379 | } |
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| 380 | } |
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| 381 | if (toks.hasMoreTokens()) { |
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| 382 | try { |
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| 383 | double d = (new Double(toks.nextToken())).doubleValue(); |
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| 384 | if (tMin == null) { |
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| 385 | graph.setTMin(new Constant(d)); |
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| 386 | if (tracer != null) |
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| 387 | tracer.setMin(d); |
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| 388 | } |
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| 389 | else |
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| 390 | tMin.setVal(d); |
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| 391 | } |
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| 392 | catch (NumberFormatException e) { |
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| 393 | } |
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| 394 | } |
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| 395 | if (toks.hasMoreTokens()) { |
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| 396 | try { |
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| 397 | double d = (new Double(toks.nextToken())).doubleValue(); |
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| 398 | if (tMax == null) { |
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| 399 | graph.setTMax(new Constant(d)); |
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| 400 | if (tracer != null) |
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| 401 | tracer.setMax(d); |
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| 402 | } |
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| 403 | else |
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| 404 | tMax.setVal(d); |
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| 405 | } |
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| 406 | catch (NumberFormatException e) { |
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| 407 | } |
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| 408 | } |
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| 409 | if (toks.hasMoreTokens()) { |
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| 410 | try { |
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| 411 | int d = (int)Math.round((new Double(toks.nextToken())).doubleValue()); |
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| 412 | if (tIntervals == null) { |
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| 413 | if (tracer != null && tracer.getIntervals() == graph.getIntervals()) |
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| 414 | tracer.setIntervals(d); |
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| 415 | graph.setIntervals(new Constant(d)); |
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| 416 | } |
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| 417 | else |
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| 418 | tIntervals.setVal(d); |
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| 419 | } |
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| 420 | catch (NumberFormatException e) { |
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| 421 | } |
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| 422 | } |
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| 423 | } |
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| 424 | |||
| 425 | // Set up the example data and recompute everything. |
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| 426 | |||
| 427 | if (functionInput != null) { |
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| 428 | // If there is a function input box, put the example text in it. |
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| 429 | functionInput.setText(example); |
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| 430 | functionInput2.setText(example2); |
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| 431 | } |
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| 432 | else { |
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| 433 | // If there is no user input, set the function in the graph directly. |
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| 434 | try { |
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| 435 | Function f = new SimpleFunction( parser.parse(example), xVar ); |
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| 436 | ((WrapperFunction)xFunc).setFunction(f); |
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| 437 | Function g = new SimpleFunction( parser.parse(example2), xVar ); |
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| 438 | ((WrapperFunction)yFunc).setFunction(g); |
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| 439 | } |
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| 440 | catch (ParseError e) { |
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| 441 | // There should't be parse error's in the Web-page |
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| 442 | // author's examples! If there are, the function |
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| 443 | // just won't change. |
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| 444 | } |
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| 445 | } |
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| 446 | CoordinateRect coords = canvas.getCoordinateRect(0); |
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| 447 | coords.setLimits(limits); |
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| 448 | coords.setRestoreBuffer(); |
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| 449 | mainController.compute(); |
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| 450 | |||
| 451 | } // end doLoadExample() |
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| 452 | |||
| 453 | |||
| 454 | public void stop() { // stop animator when applet is stopped |
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| 455 | if (tracer != null) |
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| 456 | tracer.stop(); |
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| 457 | super.stop(); |
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| 458 | } |
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| 459 | |||
| 460 | |||
| 461 | // jm.evers; handy functions, not invented here :( |
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| 462 | public static byte [] loadURL(URL url) throws IOException { |
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| 463 | int bufSize = 1024 * 2; |
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| 464 | byte [] buf = new byte[bufSize]; |
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| 465 | ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
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| 466 | BufferedInputStream in = new BufferedInputStream(url.openStream()); |
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| 467 | int n; |
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| 468 | while ((n = in.read(buf)) > 0){ |
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| 469 | bout.write(buf, 0, n); |
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| 470 | } |
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| 471 | try { in.close(); } catch (Exception ignored) { } |
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| 472 | return bout.toByteArray(); |
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| 473 | } |
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| 474 | |||
| 475 | public static String loadFile(String fname) throws IOException { |
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| 476 | byte[] bytes = loadURL(new URL("file:" + fname)); |
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| 477 | return new String(bytes); |
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| 478 | } |
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| 479 | |||
| 480 | public static String load(String fileOrURL) throws IOException { |
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| 481 | try { |
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| 482 | URL url = new URL(fileOrURL); |
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| 483 | return new String(loadURL(url));} |
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| 484 | catch (Exception e) { return loadFile(fileOrURL);} |
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| 485 | } |
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| 486 | } |
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| 487 | // end class Parametric |