Solution to setRollOverIcon (for JButton) problem

Question

Hi all,
I've seen a lot of posts asking why setRolloverIcon() didn't work. I had the same problem, and after looking throught the SwingSet example, I found the solution.
So far, the only way that I've been able to get the rollover icon to work is through the following code:
JToolBar toolBar = new JToolBar();
JButton button = new JButton(defaultImage);
toolBar.add(button);
button.setRolloverIcon(rolloverImage);
...I don't know why, but if you set the rollover icon before you add the button to the toolbar (or whichever component you add the button to), the rollover icon doesn't work.
Hope this helps.

Answer 1

This is the class I generally use for toolbars.
* Toolbar.java
* Created on 29 September 2002, 21:01
package org.argouml.ui;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.Insets;
* @author  Bob Tarling
public class Toolbar extends JToolBar {
    /** Creates a new instance of Toolbar */
    public Toolbar(String title) {
        this.setFloatable(true);
        this.putClientProperty("JToolBar.isRollover", Boolean.TRUE);
        this.setMargin(new Insets(0,0,0,0));
    /** Creates a new instance of Toolbar */
    public Toolbar() {
        super();
        this.setFloatable(false);
        this.putClientProperty("JToolBar.isRollover", Boolean.TRUE);
        this.setMargin(new Insets(0,0,0,0));
    public Toolbar(int orientation) {
        super(orientation);
        this.setFloatable(false);
        this.putClientProperty("JToolBar.isRollover", Boolean.TRUE);
        this.setMargin(new Insets(0,0,0,0));
}