Name: gm110360 Date: 08/22/2002


FULL PRODUCT VERSION :
Using 2 versions:

java version "1.3.1_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_02-b02)
Java HotSpot(TM) Client VM (build 1.3.1_02-b02, mixed mode)

java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b14)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b14, mixed mode)

FULL OPERATING SYSTEM VERSION :
Windows 2000
5.00.2195
Service Pack 2

EXTRA RELEVANT SYSTEM CONFIGURATION :
Video Card:
ASIC Type: Radeon VE
ASIC ID: 5159
Bus Type: AGP1,2,4X

Memory Size: 32M
Memory Type: DDR SGRAM / SDRAM

A DESCRIPTION OF THE PROBLEM :
My goal was to create a JMenuItem that was transparent. I
ran a code example that displayed a transparent JMenuItem
over an image. However, when you moved

the mouse up and down the selection list of the menu, the
rollover would occur (highlight and unhighlight) and
trigger a repaint. The repaint is where the

problem is, as the items would repaint incorrectly, and
transparency was lost once you rolled over an item. The
repaint would paint over top of the last

image in the buffer, so the more rolloevers you did, the
darker the image got, until transparency was lost
completely. The important point here is that I ran

this using JDK1.3.1_02.

Well, I tried to go to JDK1.4, in the hopes of it being
fixed. However, with 1.4 there is no transparency showing
up whatsoever, and the menu item is acting

as if I specified a default menu item.

So, I went and downloaded a professional product, hoping it
was a code problem, or maybe I might find a workaround. So
I checked out the "Skin Look and

Feel". If you run the Skin demo with Java 1.3, their menus
appear transparent, and animate from 0% opacity, to approx
75% opacity, and stay transparent.

Everything worked perfectly. So I assume it was my code,
which I'm going to look into. However, if you run this demo
in 1.4, there is no transparency, thus

there is no animation either. Here is the info for the skin
demo:

  Company: L2FProd.com
Product: SkinLF 1.2.2
URL: http://www.l2fprod.com/
Click on WebStart Demo to launch

In conclusion, my problem is this: Sun says 1.3 apps will
work on 1.4, but they don't. I realize Java 2D has
undergone some serious changes. But is there a

workaround for this particular problem? Is this a known
problem? If so, when will it be fixed?


REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. compile all classes in default package
2. run ThemeTest
3. rollovers menu items with mouse

EXPECTED VERSUS ACTUAL BEHAVIOR :
transparency display/repaint problems

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Note: To run properly, you need to get a JPG, and JPG file at least 200x200
pixels or so, and call it "sample.jpg", and leave it in the default directory
where the classes are.

There are 3 classes:



ThemeTest.java

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class ThemeTest extends JFrame implements ItemListener {
  JMenu menu = null;
  JMenuItem item1 = null;
  JMenuItem item2 = null;
  JMenuItem item3 = null;

  ThemeTest() {
    menu = new JMenu("MENU");
    item1 = new JMenuItem("Item 1");
    item2 = new JMenuItem("Item 2");
    item3 = new JMenuItem("Item 3");
    menu.add(item1);
    menu.add(item2);
    menu.add(item3);
    menu.addItemListener(this);
    JMenuBar bar = new JMenuBar(); bar.add(menu);
    setJMenuBar(bar);
    JLabel label = new JLabel(new ImageIcon("sample.jpg"));
    getContentPane().add(label);
    this.setSize(250, 250);
  }

  public static void main(String[] args) {
    TransparentTheme.install(); new ThemeTest().show();
  }

  public void itemStateChanged(ItemEvent e) {
    System.out.println("action");
  }
}




TransparentTheme.java

import javax.swing.UIManager;
import javax.swing.plaf.ColorUIResource;
import javax.swing.plaf.metal.DefaultMetalTheme;
import javax.swing.plaf.metal.MetalLookAndFeel;

public class TransparentTheme extends DefaultMetalTheme {
  public ColorUIResource getMenuBackground() {
    return getT(super.getMenuBackground());
  }

  public ColorUIResource getMenuSelectedBackground() {
    return getT(super.getMenuSelectedBackground());
  }

  private static ColorUIResource getT(ColorUIResource c) {
    return new TransparentColorUIResource(c);
  }

  public static void install() {
    MetalLookAndFeel.setCurrentTheme(new TransparentTheme());
    try {
      UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    }
    catch (Exception ex) {
      System.out.println("Failed loading Metal");
      System.out.println(ex);
    }
  }
}




TransparentColorUIResource.java

import java.awt.Color;
import javax.swing.plaf.ColorUIResource;

public class TransparentColorUIResource extends ColorUIResource {
  private static int MASK = 0x66ffffff;
  private int r, g, b;
  int rgba32;

  public TransparentColorUIResource(Color c) {
    super(c);
    // This is a nasty hack, but ColorUIResource has no transparency
    // option in the constructor
    r = c.getRed();
    g = c.getGreen();
    b = c.getBlue();
  }

  public int getRGB() {
    rgba32 = (0x11ffffff | (r << 16) | (g << 8) | b);
    return rgba32;
  }
}

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

Release Regression From : hopper-rc
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: 159564)
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