Re: Problem with GridLayout

From:
Vova Reznik <address@mail.com>
Newsgroups:
comp.lang.java.gui
Date:
Tue, 23 May 2006 18:25:57 GMT
Message-ID:
<VsIcg.13966$fb2.6654@newssvr27.news.prodigy.net>
erenay wrote:

Thanks for the answers.

I used frame.pack(); but it didn't help, the same problem goes on.
This is how the frame looks like:
http://img50.imageshack.us/img50/5034/graph1xz.jpg
graphNum was 4 and sliceNum was 6. When I change the size of the frame,
the graph adjusts itself to an appropriate size.

This is how my Graph class is like:
---------------------------------------------------------------------------------
public class Graph extends JComponent{

  public SliceVal[] slices;

  public Graph(){
   slices = new SliceVal[AProject.sliceNum];
  }

  public SliceVal[] getSliceVal(){
    return this.slices;
  }

  public void setSliceVal(SliceVal[] slices){
    this.slices = slices;
  }

  public void drawGraph(Graphics2D g, Rectangle area, SliceVal[]
slices) {
        ...
        g.setColor(...);
        g.fillArc(...);
        }
      }

  public void paint(Graphics g) {
        drawGraph((Graphics2D)g, getBounds(), slices);
  }
}
------------------------------------------------------------

Maybe the problem is with getBounds(), returning the coordinate of the
rectangle as (0,0)
I don't know. What should I do?


Check this.
- Graph needs to have preferred size.
- Don't override paint, but do paintComponent
(nothing wrong with your example)

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class TestSlices {

    private static Color colors[] = { Color.GREEN, Color.RED, Color.CYAN,
            Color.ORANGE, Color.MAGENTA, Color.BLUE };

    public static void main(String[] args) {
        JPanel pnl = new JPanel(new GridLayout(1, colors.length));
        for (int i = 0; i < 7; i++) {
            pnl.add(new Graph());
        }

        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(pnl);
        f.pack();
        f.setVisible(true);

    }

    static class Graph extends JComponent {

        Graph() {
            setPreferredSize(new Dimension(100, 100));
        }

        protected void paintComponent(Graphics g) {
            // public void paint(Graphics g) {
            int x = 0;
            int y = 0;
            int w = getWidth() / 2;
            int h = getHeight() / 2;
            int shift = 60;
            for (int i = 0, angle = 0; i < colors.length; i++, angle += shift) {
                g.setColor(colors[i]);
                g.fillArc(x, y, w, h, angle, shift);
            }
        }
    }
}

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