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Thread: Help with pie chart

  1. #1
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    Question Help with pie chart

    How to draw multiple pie charts according to DArray, and how to compute scale factor for 400*300?
    Last edited by Wise girl; June 1st, 2012 at 03:41 AM.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Help with pie chart

    What packages and classes are you trying to use for your project? Have you done a Google search for packages that will do pie charts?
    Last edited by Norm; June 1st, 2012 at 09:57 AM. Reason: removed comment about location
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Help with pie chart

    Thead moved to Java Theory & Questions

  4. #4
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    Default Re: Help with pie chart

    I use Guiapp class and plot button that plot the charts of Drawing Canvas class( which draw the pies)

    Is this code correct:
    String cmd = "arc" x + " " + y + " " + theta + " " + color;

  5. #5
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    Default Re: Help with pie chart

    Is this code correct:
    Does it compile? Does it create a String?
    What do you want to resultant String to contain?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Help with pie chart

    I want it to contain the DArray of cols and rows that is in the file text

  7. #7
    Super Moderator Norm's Avatar
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    Default Re: Help with pie chart

    What will the String: cmd be used for?

    What is DArray? Is it a java package you are using? I've never seen any reference to it and can only suggest that you rread the doc that comes with the package.
    If you don't understand my answer, don't ignore it, ask a question.

  8. #8
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    Default Re: Help with pie chart

    That what I have in DrawingCanvas class,but I do not how to do PlotButtonAction class that plots the pie charts.

    public class DrawingCanvas extends JPanel {

    int width;
    int height;
    ActionContainer acRef = null;

    DrawingCanvas(int width, int height, ActionContainer acRef) {
    this.acRef = acRef;
    this.width = width;
    this.height = height;
    }

    public DrawingCanvas(BorderLayout borderLayout) {

    }

    private void execute(String actionLine, Graphics g) {
    System.out.println("action=" + actionLine);

    String array[] = actionLine.split(" ");
    /*Color cArray[] = {
    Color.red,
    Color.white,
    Color.blue,
    Color.green,
    Color.black
    };*/
    int xCenter = getWidth()/ 2;
    int yCenter = getHeight()/ 2;
    int radius = (int) (Math.min(getWidth(), getHeight()) * 0.4);
    int x1 = xCenter - radius;
    int y1 = yCenter - radius;
    int x2 = xCenter - radius;
    int y2 = yCenter - radius;
    int x3 = xCenter - radius;
    int y3 = yCenter - radius;


    DArray[] slices= null;
    double total = 0.0D;
    for (int i=0; i<slices.length; i++) {
    total += slices[i].value;
    }


    double curValue = 0.0D;
    int startAngle = 0;
    for (int i=0; i<slices.length; i++) {

    startAngle = (int)(curValue * 360 / total);
    int arcAngle = (int)(slices[i].value * 360 / total);


    if (i == slices.length-1) {
    arcAngle = 360 - startAngle;
    }


    /*if (array[0].equals("arc")) {
    int x1 = Integer.parseInt(array[1]);
    int y1 = Integer.parseInt(array[2]);
    int x2 = Integer.parseInt(array[3]);
    int y2 = Integer.parseInt(array[4]);
    int colorIndex = Integer.parseInt(array[5]);
    Color c = cArray[colorIndex];
    g.setColor(c);*/
    g.setColor(slices[i].color);
    g.fillArc(x1,y1,width, height, startAngle, arcAngle);
    g.fillArc(x2,y2,width, height, startAngle, arcAngle);
    g.fillArc(x3,y3,width, height, startAngle, arcAngle);
    }

    }

    protected void paintComponent(Graphics g) {
    super.paintComponent(g);

    while( ! acRef.empty() ) {
    String action = acRef.pop();
    execute(action, g);
    }
    }
    }

  9. #9
    Super Moderator Norm's Avatar
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    Default Re: Help with pie chart

    Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting


    The posted code won't compile because it is missing the import statements.
    If you don't understand my answer, don't ignore it, ask a question.

  10. #10
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    Default Re: Help with pie chart

    import java.awt.BorderLayout;
    import java.awt.Color;
    import java.awt.Component;
    import java.awt.Graphics;
    import javax.swing.JPanel;

  11. #11
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    Default Re: Help with pie chart

    Do you have any idea about how to do PlotButton construction action?

  12. #12
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    Default Re: Help with pie chart

    Please Edit your post and wrap your code with[code=java]<YOUR CODE HERE>[/code] to get highlighting

    I don't know anything about a PlotButton.
    Last edited by Norm; June 2nd, 2012 at 07:36 PM.
    If you don't understand my answer, don't ignore it, ask a question.

  13. #13
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    Default Re: Help with pie chart

    Thank you a lot.

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