Name: jk109818 Date: 03/06/2002


FULL PRODUCT VERSION :
java version "1.4.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-rc-b91)
Java HotSpot(TM) Client VM (build 1.4.0-rc-b91, mixed mode)

FULL OPERATING SYSTEM VERSION : W2000 SP2




A DESCRIPTION OF THE PROBLEM :
When you add a Mouse Listener to a JComboBox (e.g. for a
popup Window),
everything works fine with Windows Look and Feel.
In Metal Look and Feel, the mouse listener ignored.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile with UIManager Metal/Windows
2. right click on components
3. No popup on Metal JComboBox, but one on Windows

EXPECTED VERSUS ACTUAL BEHAVIOR :
Mouse Listener should work on Metal

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/**
 * Mouse Listener on JComboBox bug:
 * Java 1.4.0 RC
 * When you add a Mouse Listener to a JComboBox (e.g. for a popup Window),
 * everything works fine with Windows Look and Feel.
 * In Metal Look and Feel, the mouse listener is ignored
 *
 * Testcase:
 * - emable or disable setting the Look and Feel in the main method
 * - compile and run java SwingBug.class
 * - right-click on the different components
 * - if Windows, you get a popup window on the top ComboBox and on the label
 * - if Metal, you get the a popup window only on the label
 */

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

public class SwingBug extends JFrame implements MouseListener, ActionListener
{
public static void main(String[] args)
{
try {
UIManager.setLookAndFeel
(UIManager.getSystemLookAndFeelClassName());
System.out.println(UIManager.getLookAndFeel().toString
());
} catch (Exception e) {}
new SwingBug();
}

private JComboBox jComboBox1 = new JComboBox();
private JComboBox jComboBox2 = new JComboBox();
private JPopupMenu jPopupMenu1 = new JPopupMenu();
private JMenuItem jMenuItem1 = new JMenuItem();
private JMenuItem jMenuItem2 = new JMenuItem();
private JLabel jLabel1 = new JLabel();

public SwingBug()
{
System.out.println(java.util.Locale.US);
try
{
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
jbInit();
pack();
show();
}
catch(Exception e)
{
e.printStackTrace();
}
}
private void jbInit() throws Exception
{
jComboBox1.addItem("one");
jComboBox1.addItem("two");
jComboBox1.addItem("three");
jComboBox2.addItem("X one");
jComboBox2.addItem("X two");
jComboBox2.addItem("X three");
jMenuItem1.setText("PopUpMenu1");
jMenuItem2.setText("PopUpMenu2");
jLabel1.setText("jLabel1");

this.getContentPane().add(jComboBox1, BorderLayout.NORTH);
this.getContentPane().add(jComboBox2, BorderLayout.SOUTH);
this.getContentPane().add(jLabel1, BorderLayout.CENTER);
jPopupMenu1.add(jMenuItem1);
jPopupMenu1.add(jMenuItem2);
//
jLabel1.addMouseListener(this);
jComboBox1.addMouseListener(this);
}

public void mouseClicked(MouseEvent e)
{
System.out.println ("mouseClicked on " + e.getSource().getClass
().toString());
if (SwingUtilities.isRightMouseButton(e))
jPopupMenu1.show((Component)e.getSource(), e.getX(),
e.getY());
}
public void mousePressed(MouseEvent e)
{
// System.out.println ("mousePressed on " + e.getSource().getClass
().toString());
}
public void mouseReleased(MouseEvent e)
{
// System.out.println ("mouseReleased on " + e.getSource().getClass
().toString());
}
public void mouseEntered(MouseEvent e)
{
// System.out.println ("mouseEntered on " + e.getSource().getClass
().toString());
}
public void mouseExited(MouseEvent e)
{
// System.out.println ("mouseExited on " + e.getSource().getClass
().toString());
}
public void actionPerformed(ActionEvent e)
{
System.out.println ("actionPerformed from " + e.getSource
().getClass().toString());
}

} // SwingBug


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

CUSTOMER WORKAROUND :
Trying to find it in UI Delegate. Not found yet.
(Review ID: 139091)
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