Name: gm110360 Date: 04/23/2004


FULL PRODUCT VERSION :
java version "1.4.2_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
I have placed a JPanel into JColorChooser using the
setPreviewPanel(JComponent) method.

Whenever the JColorChooser is resized, the JPanel gains an extra 10 pixels in height, and 26 pixels in width.

I have managed to work around this for the moment by overriding the getPreferredSize() method in the JPanel class, and making it return a constant value.

I think there is a bug in the layout class used by the JColorChooser to layout the position of the preview panel.

This problem does not occur in java 1.3.1-b24

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the supplied test code and resize the window by dragging an edge a few times.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The preview panel stays a constant size when the window is resized. At least it does in java 1.3.1-b24

ACTUAL -
The preview panel will gain an extra 10 pixels of height and 26 pixels of width each time the window is resized.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package testcolorchooser;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Frame1 extends JFrame
{
  private JPanel contentPane;
  private BorderLayout borderLayout1 = new BorderLayout();
  private JColorChooser jColorChooser1 = new JColorChooser();
  private JPanel myPreviewPanel = new JPanel();

  //Construct the frame
  public Frame1()
  {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try
    {
      jbInit();
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    contentPane.add(jColorChooser1, BorderLayout.CENTER);
    myPreviewPanel.setBackground(Color.cyan);
    myPreviewPanel.setSize(200,50);
    myPreviewPanel.setPreferredSize(new Dimension(200,50));
    jColorChooser1.setPreviewPanel(myPreviewPanel);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  //Main method
  public static void main(String[] args)
  {
    try
    {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
    Frame1 frame = new Frame1();
    frame.validate();
    //Center the window
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Override the setPreferredSize() method of the JComponent being used as a custom preview panel so that it returns a constant value

Release Regression From : 1.3.1
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Incident Review ID: 250200)
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