Name: gm110360 Date: 05/23/2002


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)

FULL OPERATING SYSTEM VERSION :
Microsoft Windows 2000 [Version

5.00.2195]

A DESCRIPTION OF THE PROBLEM :
setBackground for JTabbedPane instances seems to have no effect.

setOpaque( true ) also has no effect. Both of
these routines worked

correctly in Java 1.3.1 but now fail.


REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Run code at bottom in Java 1.3.1
2. Run code at bottom in Java 1.4
3.

EXPECTED VERSUS ACTUAL BEHAVIOR :
I expect that the JTabbedPane should be transparent when I perform

setOpaque( false ).

I think this has something to do with
JTabbedPane
now providing background across it's contentPanes, but
the ability to
make them transparent should be supported.

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
// Have a ball!
import java.awt.*;
import javax.swing.*;

public class Main {
  public

static void main( String argv[] ) {
    JFrame frame = new JFrame( "Background frame" );

    
JPanel
panel = new JPanel( new BorderLayout());
    panel.setBackground( Color.yellow );
    

panel.setPreferredSize( new Dimension( 200, 200 ) );

    JButton opaqueButton = new
JButton(
"opaque button" );
    opaqueButton.setBackground( Color.white );
    

opaqueButton.setOpaque( true );

    JButton transparentButton = new JButton(
"transparent
button" );
    transparentButton.setBackground( Color.white );
    

transparentButton.setOpaque( false );

    JTabbedPane transparentTabbedPane = new

JTabbedPane();
    transparentTabbedPane.setPreferredSize( new Dimension( 100, 100 ) );
    

transparentTabbedPane.setBackground( Color.green );
    

transparentTabbedPane.setOpaque( false );

    JTabbedPane opaqueTabbedPane = new

JTabbedPane();
    opaqueTabbedPane.setPreferredSize( new Dimension( 100, 100 ) );
    

opaqueTabbedPane.setBackground( Color.green );
    opaqueTabbedPane.setOpaque( true

);

    panel.add( opaqueButton, "North" );
    panel.add( transparentButton, "South" );
    

panel.add( transparentTabbedPane, "East" );
    panel.add( opaqueTabbedPane, "West" );
    

frame.getContentPane().add( "Center", panel );
    frame.pack();
    frame.show();
  
}
}

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

CUSTOMER WORKAROUND :
No obvious workarounds

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: 145189)
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