Java example source code file (bug7156657.java)

This example Java source code file (bug7156657.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, boolean, bufferedimage, callable, exception, graphics2d, gui, image, jframe, jpanel, jpopupmenu, override, rectangle, robot, runnable, suntoolkit, swing, threading, threads, transparentmenuitem

The bug7156657.java Java example source code

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import com.sun.awt.AWTUtilities;
import sun.awt.SunToolkit;

import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.concurrent.Callable;

/* @test
   @bug 7156657
   @summary Version 7 doesn't support translucent popup menus against a translucent window
   @library ../../regtesthelpers
   @author Pavel Porvatov
*/
public class bug7156657 {
    private static JFrame lowerFrame;

    private static JFrame frame;

    private static JPopupMenu popupMenu;

    public static void main(String[] args) throws Exception {
        final Robot robot = new Robot();
        final SunToolkit toolkit = ((SunToolkit) Toolkit.getDefaultToolkit());

        Boolean skipTest = Util.invokeOnEDT(new Callable<Boolean>() {
            @Override
            public Boolean call() throws Exception {
                frame = createFrame();

                if (!AWTUtilities.isTranslucencyCapable(frame.getGraphicsConfiguration())) {
                    System.out.println("Translucency is not supported, the test skipped");

                    return true;
                }

                lowerFrame = createFrame();
                lowerFrame.getContentPane().setBackground(Color.RED);
                lowerFrame.setVisible(true);

                popupMenu = new JPopupMenu();
                popupMenu.setOpaque(false);
                popupMenu.add(new TransparentMenuItem("1111"));
                popupMenu.add(new TransparentMenuItem("2222"));
                popupMenu.add(new TransparentMenuItem("3333"));

                AWTUtilities.setWindowOpaque(frame, false);
                JPanel pnContent = new JPanel();
                pnContent.setBackground(new Color(255, 255, 255, 128));
                frame.add(pnContent);
                frame.setVisible(true);

                return false;
            }
        });

        if (skipTest) {
            return;
        }

        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                popupMenu.show(frame, 0, 0);
            }
        });

        toolkit.realSync();

        Rectangle popupRectangle = Util.invokeOnEDT(new Callable<Rectangle>() {
            @Override
            public Rectangle call() throws Exception {
                return popupMenu.getBounds();
            }
        });

        BufferedImage redBackgroundCapture = robot.createScreenCapture(popupRectangle);

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                lowerFrame.getContentPane().setBackground(Color.GREEN);
            }
        });

        toolkit.realSync();

        BufferedImage greenBackgroundCapture = robot.createScreenCapture(popupRectangle);

        if (Util.compareBufferedImages(redBackgroundCapture, greenBackgroundCapture)) {
            throw new RuntimeException("The test failed");
        }

        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                popupMenu.setVisible(false);
                frame.dispose();
                lowerFrame.dispose();
            }
        });

        System.out.println("The test passed");
    }


    private static JFrame createFrame() {
        JFrame result = new JFrame();

        result.setLocation(0, 0);
        result.setSize(400, 300);
        result.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        result.setUndecorated(true);

        return result;
    }

    private static class TransparentMenuItem extends JMenuItem {
        public TransparentMenuItem(String text) {
            super(text);
            setOpaque(false);
        }

        @Override
        public void paint(Graphics g) {
            Graphics2D g2 = (Graphics2D) g.create();
            g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f));
            super.paint(g2);
            g2.dispose();
        }
    }
}