FULL PRODUCT VERSION :
Tested on:

JDK 1.6.0_07
JDK 1.6.0_05

ADDITIONAL OS VERSION INFORMATION :
Tested in Vista x64 and Windows XP.

A DESCRIPTION OF THE PROBLEM :

When creating a custom icon class (one that extends javax.swing.Icon) and adding it to a JButton, the icon is not disabled when the JButton is disabled i.e. when JButton.setEnabled(false) is called.

The exact same image when added to an ImageIcon works correctly when added to a JButton.

Code to reproduce the problem is listed below.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a class that implements Icon. Instantiate a JButton and pass in the custom icon as the displayable image.

Set the JButton to disabled by invoking JButton.setEnabled(false).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expected the disabled JButton that used the custom icon class to have the image be grayed out (per the way the ImageIcon JButton worked).

This does not occur.
ACTUAL -

The JButton that was disabled and used the custom icon class did not display the disabled icon as expected. The icon image on the disabled JButton still looked "active".

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

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

public class TestIcon extends JFrame
{
public class CustomIcon implements Icon
{
private Image mImage;

public CustomIcon(Image image)
{
mImage = image;
}

public int getIconWidth()
{
return mImage.getWidth(null);
}

public int getIconHeight()
{
return mImage.getHeight(null);
}

public void paintIcon(Component c, Graphics g, int x, int y)
{
g.drawImage(mImage, x, y, c);
}
}


public TestIcon()
{
Image image = Toolkit.getDefaultToolkit().getImage(".\\image.gif");

ImageIcon imageIcon = new ImageIcon(image);
CustomIcon customIcon = new CustomIcon(image);

JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1, 4));


JButton button = new JButton(imageIcon);
panel.add(button);

button = new JButton(imageIcon);
button.setEnabled(false);
panel.add(button);

button = new JButton(customIcon);
panel.add(button);

button = new JButton(customIcon);
button.setEnabled(false);
panel.add(button);

Container cp = this.getContentPane();
cp.add(panel);

this.pack();
this.setVisible(true);
}



public static void main(String[] args)
{
new TestIcon();
}
}


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :

Did not find a workaround to this problem.