JFrame help
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Thread: JFrame help

  1. #1
    Join Date
    Aug 2009
    Posts
    3

    JFrame help

    Below is the code to generate the random color,size and position of rectangles in a JFrame. my question is how can i make sure that the rectangle drawn is entirely
    inside the JFrame? Asume the frame is 500x500


    class DrawPanel extends JPanel {

    public void paintComponent(Graphics g){

    Graphics2D g2 = (Graphics2D) g;

    int r = (int) (Math.random() * 250);
    int gr = (int) (Math.random() * 250);
    int b = (int) (Math.random() * 250);

    g.setColor(new Color(r,gr,b));

    int ht = (int) ((Math.random() * 120) + 10);
    int width = (int) ((Math.random() * 120) + 10);
    int x = (int) ((Math.random() * 40) + 10);
    int y = (int) ((Math.random() * 40) + 10);

    g.fillRect(x,y,ht,width);

  2. #2
    Join Date
    May 2006
    Location
    UK
    Posts
    4,474

    Re: JFrame help

    There are a few ways of tackling this, a simple way is to generate the x and y points first and then generate the width and height with maximum values of the frame size minus the location ie max rect width = frame width - x and max rect height = frame height - y
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