Name: jk109818 Date: 10/15/2002


FULL PRODUCT VERSION :

The problem described in my bug report still exists in:
JRE 1.3.1_03
JRE 1.3.1_04
JRE 1.3.1_05

It does NOT exist in:
JRE 1.3.1
JRE 1.3.1_02
AND
JRE 1.4.0
JRE 1.4.0_01
JRE 1.4.1-beta
JRE 1.4.1

FULL OPERATING SYSTEM VERSION :
Microsoft Windows 2000 [Version 5.00.2195]
Service Pack 2

ADDITIONAL OPERATING SYSTEMS :
Microsoft Windows NT 4.0 SP6


EXTRA RELEVANT SYSTEM CONFIGURATION :
Microsoft Internet Explorer 5.50.4807.2300IS


A DESCRIPTION OF THE PROBLEM :
Scenario 1:
Start the demo-applet with Test.html in Internet Explorer .
In IE choose menu item "File - New - Window" --> a new
Browser window appears and a new instance of the applet is
started in the same VM as the first applet instance.
Press the button "Open Dialog" in one of the applets. A
small dialog with only a "Close" button appears. This dialog
is not modal, its parent is a Frame which has been returned
by "JOptionPane.getFrameForComponent(this);". So it always
stays in front of its parent applet.
Now click to the other applet to move focus to that applet.
The dialog just opened before disappears.
The console output shows that the dialog receives a
"WindowClosing"-Event, but what is this event caused by ?
This seems to be an error.

Scenario 2:
Start the demo-applet with Test.html in Internet Explorer .
Press the button "Open Dialog" in the applet. A small dialog
with only a "Close" button appears.
In IE choose menu item "File - New - Window" --> a new
Browser window appears and a new instance of the applet is
started in the same VM as the first applet instance.
Simulaneously the dialog just opened before disappears.
The console output shows that the dialog receives a
"WindowClosing"-Event, but what is this event caused by ?
This seems to be an error.


The closing of the dialog does not appear if its parent is
null. But in this case the dialog can get behind the
original applet window which makes it rather useless to us.


Background information to our "real world" applet and why
this is important for us:
We have implemented a rather large applet which has to run
in multiple instances simultaneously, because it provides a
UI to different kind of data each. There are dialogs in the
applet which must be modal. But ordinary modal dialogs are
blocking not only to their parent applet but to all applets
running in the same VM. We need them to be blocking only
to their parent applet. so we created a workaround which
uses nonmodal dialogs and do the blocking by explicit
synchronisation of threads (wait, notify) and a glass pane
mechanism similar to the one described in JDC Tech Tips
December 20, 2001 . This works reliable up to JRE 1.3.1_02
and even with JRE 1.4 but NOT with JRE 1.3.1_03. The
reason for the malfunction is the unwanted closing of
dialogs by just moving focus to an other applet instance. It
could be reproduced with the above small test applet.
If this JRE 1.3.1_03 behaviour makes its way into coming
releases of the JRE we have a serious problem, because we
cannot deliver our already existing solution for that issue
of modal dialogs to our customer any longer.

REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.Start the demo-applet with Test.html in Internet Explorer
2.In IE choose menu item "File - New - Window" --> a new
Browser window appears and a new instance of the applet is
started in the same VM as the first applet instance.
3.Press the button "Open Dialog" in one of the applets. A
small dialog with only a "Close" button appears.
4.Now click to the other applet to move focus to that
applet.

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected:
The dialog should not be closed when moving focus to the
other applet.

Actual:
The dialog is closed when moving focus to the other applet.

This bug can be reproduced always.

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

// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XXXXXXXXXXXXX NEW FILE FOLLOWING XXXXXXXXXXXXXXX
// XXXXXXXXXXXXX Name: Test.java XXXXXXXXXXXXXXX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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

//-----------------------------------------------

public class Test extends JApplet
implements ActionListener
{

    private Container contPane;

//-----------------------------------------------

    public void start()
    {

    }

//-----------------------------------------------

    public void stop()
    {

    }

//-----------------------------------------------

    public void destroy()
    {

    }

//-----------------------------------------------

    public void init()
    {

        contPane = getContentPane();
        contPane.setLayout(new BorderLayout());
        contPane.add("Center",new JLabel("press button to open a dialog"));
        JButton buOpen = new JButton("Open Dialog");
        buOpen.addActionListener(this);
        contPane.add("South",buOpen);
    }

//-----------------------------------------------
    
    public void actionPerformed(ActionEvent ae)
    {

        Frame oOwnerFrame = JOptionPane.getFrameForComponent(this);

        System.out.println("OwnerFrame=" + oOwnerFrame);
        
        NotModDlg oDlg = new NotModDlg(oOwnerFrame, contPane);
        oDlg.show();

    }

//-----------------------------------------------

}


// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XXXXXXXXXXXXX NEW FILE FOLLOWING XXXXXXXXXXXXXXX
// XXXXXXXXXXXXX Name: NotModDlg.java XXXXXXXXXXXXXXX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

import java.awt.*;
import java.awt.event.*;
import java.util.*;

import javax.swing.*;
import javax.swing.event.*;


public class NotModDlg
implements ActionListener
{


    private Container parentContPane = null;

    private JDialog dialog = null;

    private WindowListener oDlgWinListener = null;

    private final boolean SYSOUT_TRC = true;


    public NotModDlg(Frame owner, Container parContPane)
    {
        parentContPane = parContPane;

// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
        dialog = new JDialog(owner, false);
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

        Container contPane = dialog.getContentPane();
        contPane.setLayout(new BorderLayout());
        JButton buClose = new JButton("Close");
        buClose.addActionListener(this);
// dialog.setSize(100,50);
        contPane.add(buClose);


        dialog.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);

        oDlgWinListener = new WindowAdapter() {
            public void windowClosing(WindowEvent e)
            {
                if (SYSOUT_TRC)
                {
                    System.out.println("WindowAdapter windowClosing");
                    System.out.println("WindowEvent e=" + e);
                    System.out.println("WindowEvent dialog=" + dialog);
                    System.out.println("WindowEvent window=" + e.getWindow() + "
 paramString=" + e.paramString());
                }

            }
        };
        dialog.addWindowListener(oDlgWinListener);
        
        dialog.setLocationRelativeTo(parentContPane);
        dialog.pack();
    
    }

    public void actionPerformed(ActionEvent ae)
    {
        doDispose();
    }


    public void show()
    {
        dialog.show();
    }


public void doDispose()
{

        if ((dialog != null) && (oDlgWinListener != null))
        {
            dialog.removeWindowListener(oDlgWinListener);
        }
        oDlgWinListener = null;

dialog.dispose();

dialog = null;
    }

}

// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
// XXXXXXXXXXXXX NEW FILE FOLLOWING XXXXXXXXXXXXXXX
// XXXXXXXXXXXXX Name: Test.html XXXXXXXXXXXXXXX
// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

<HTML>
<HEAD>
<TITLE> Test </TITLE>
</HEAD>
<BODY>

<!--"CONVERTED_APPLET"-->
<!-- CONVERTER VERSION 1.1 -->
<OBJECT ID="Test"
classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 100%
HEIGHT = 100%
codebase="../JavaPlugin/j2re-1_3_1-win-i.exe#Version=1,3,1,0">
<PARAM NAME = CODE VALUE = "Test.class" >
<PARAM NAME = ARCHIVE VALUE = "" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.3"
java_CODE = "Test.class"
java_ARCHIVE = ""
WIDTH = 100%
HEIGHT = 100%
pluginspage="../JavaPlugin/jplug.html">
<NOEMBED>
</COMMENT>

</NOEMBED>
</EMBED>
</OBJECT>

<!--
<APPLET CODE = "Test.class" ARCHIVE = "" WIDTH = 90% HEIGHT = 90% >


</APPLET>
-->
<!--"END_CONVERTED_APPLET"-->


</BODY>

</HTML>

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

CUSTOMER WORKAROUND :
Do not use JRE 1.3.1_03.
Works with 1.3.1_02 and even 1.4.0.
(Review ID: 153509)
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###@###.### 10/26/04 10:30 GMT