Name: gm110360 Date: 05/30/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)


Linux lin1 2.2.16 #5 Tue Jan 29 21:24:43 CET 2002 i586
unknown
SuSE Linux 7.0
libc-2.1.3-141





A DESCRIPTION OF THE PROBLEM :
The default button functionality does not work reliably. If
I have got a container containing only a JButton instance
all works satisfactoryly. If I add a add a JTextArea
instance to the south of the container all works still
satisfactoryly. But if I add a add the JTextArea instance to
the north of the container instead of to the south the
default button functionality does not work any more. A
workaround is given by reacting on the windowActivated event
of the related WindowListener.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile the attached source code
2. Call the program by inputting >java TestDefaultButton 1
   This will display the container with fitted out only
with a JButton instance. Push the <Return> key: The
Window disappears.
3. Call the program by inputting >java TestDefaultButton 2
   This will display the container with fitted
out addtionally with a JTextArea instance at
south of container. Push the <Return> key: The
Window disappears.
4. Call the program by inputting >java TestDefaultButton 3
   This will display the container with fitted
out addtionally with a JTextArea instance at
north of the container instead of the south. Push the
<Return> key: The Window does not disappear; a beep
sounds.
5. Call the program by inputting >java TestDefaultButton 4
   This will display the container with fitted
out addtionally with a JTextArea instance at
north of the container instead of the south. But now
the WindowListener is active. Push the
<Return> key: The Window disappears.

EXPECTED VERSUS ACTUAL BEHAVIOR :
see above 'Steps to Reproduce'


ERROR MESSAGES/STACK TRACES THAT OCCUR :
None; a beep sounds.

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;


public class TestDefaultButton extends JFrame implements ActionListener
{
    private JButton button;
    
    public TestDefaultButton( String test_case )
        {
            super( "TestDefaultButton" );
            Container container = getContentPane();
            container.setLayout( new BorderLayout() );
            
            button = new JButton( "Quit" );
            button.addActionListener( this );
            container.add( button, BorderLayout.CENTER );
            getRootPane().setDefaultButton( button );

            String text =
                "the second line will be 40 chars long\n" +
                "0123456789012345678901234567890123456789\n" +
                "3\n4\n5\n6\n7\n8\n9\n10\n";
            if( ! test_case.equals( "1" ) )
            {
                JTextArea text_area = new JTextArea( text );
                text_area.setEditable( false );
                if( test_case.equals( "2" ) )
                    container.add( text_area, BorderLayout.SOUTH );
                else
                    container.add( text_area, BorderLayout.NORTH );
            }
                
            if( test_case.equals( "4" ) )
                addWindowListener( new WindowAdapter() {
                        public void windowActivated( WindowEvent event )
                            { button.requestFocus(); } } );

            pack();
            setLocation( 200, 200 );
            setVisible( true );
        }

    public void actionPerformed( ActionEvent event )
        {
            setVisible( false );
            removeAll();
            dispose();
        }


    public static void main( String[] args )
        {
            if( args.length != 1 )
                System.out.println( "You must call the program as follows\n" +
                                    " 'java TestDefaultButton 1' or\n" +
                                    " 'java TestDefaultButton 2' or\n" +
                                    " 'java TestDefaultButton 3' or\n" +
                                    " 'java TestDefaultButton 4'" );
            else
                new TestDefaultButton( args[0] );
        }
    
}

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

CUSTOMER WORKAROUND :
see source code 'if( test_case.equals( "4" ) )' and
following lines.
The windowActivated WindowEvent of the WindowListener is
used to request focus for the default button.

Release Regression From : 1.3.1_03
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Review ID: 147248)
======================================================================