Name: gm110360 Date: 11/20/2003


FULL PRODUCT VERSION :
java version "1.4.2_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_02-b03)
Java HotSpot(TM) Client VM (build 1.4.2_02-b03, mixed mode)

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

EXTRA RELEVANT SYSTEM CONFIGURATION :
Service Pack 4

A DESCRIPTION OF THE PROBLEM :
My Application uses modal dialogs with JComboBox on it.
Mouse inputs are blocked if such a modal dialog is opened for within a modal dialog and the popup of the combo box reaches outside the top dialog.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
* start the test application and use the mouse only (!!no keyboard!!)
* press button "open dialog 1"
* press button "open dialog 2"
* open popup of the combobox
* select "entry c"
* close "dialog 2"
* close "dialog 1"
* press button "open dialog 1"
* press button "open dialog 2"
* open popup of the combobox
* try to select "entry a"

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
"entry a" can be selected with a mouse click
ACTUAL -
the popup is blocked for mouse events

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ComboTest extends JFrame {
  public static void main(String[] args) {
    new ComboTest();
  }
  public ComboTest() {
    JButton b = new JButton("open dialog 1");
    b.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        openDialog1();
      }
    });
    this.getContentPane().add(b);
    this.setSize(new Dimension(200, 150));
    this.setTitle("main frame");
    this.setVisible(true);
  }
  JDialog dlg1 = null, dlg2 = null;
  void openDialog1() {
    if (dlg1 == null) {
      dlg1 = new JDialog(this,true);
      JButton b = new JButton("open dialog 2");
      b.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          openDialog2();
        }
      });
      dlg1.getContentPane().add(b);
      dlg1.setLocation(10, 10);
      dlg1.setSize(new Dimension(180, 130));
      dlg1.setTitle("dialog 1");
    }
    dlg1.setVisible(true);
  }
  void openDialog2() {
    if (dlg2 == null) {
      dlg2 = new JDialog(this,true);
      JComboBox cb = new JComboBox(new String[] {"entry a", "entry b", "entry c"});
      dlg2.getContentPane().add(cb);
      dlg2.setLocation(20, 20);
      dlg2.setSize(new Dimension(150, 50));
      dlg2.setTitle("dialog 2");
    }
    dlg2.setVisible(true);
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
The blocking does not appear if the popup fits into the dialog.
If possible use JComboBox.setMaximumRowCount() to shorten the list.

Release Regression From : 1.3.1_09
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: 224892)
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