Java example source code file (bug6694823.java)

This example Java source code file (bug6694823.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, dimension, exception, gui, insets, jframe, jmenuitem, jpanel, jpopupmenu, menuitem, point, runnable, runtimeexception, security, securityexception, string, suntoolkit, swing

The bug6694823.java Java example source code

/*
 * Copyright (c) 2008, 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.
 */

/*
 * @test
 * @bug 6694823
 * @summary Checks that popup menu cannot be partially hidden
 * by the task bar in applets.
 * @author Mikhail Lapshin
 * @run main bug6694823
 */

import javax.swing.*;
import java.awt.*;
import sun.awt.SunToolkit;
import java.security.Permission;
import sun.security.util.SecurityConstants;

public class bug6694823 {
    private static JFrame frame;
    private static JPopupMenu popup;
    private static SunToolkit toolkit;
    private static Insets screenInsets;

    public static void main(String[] args) throws Exception {
        toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                createGui();
            }
        });

        toolkit.realSync();

        // Get screen insets
        screenInsets = toolkit.getScreenInsets(frame.getGraphicsConfiguration());
        if (screenInsets.bottom == 0) {
            // This test is only for configurations with taskbar on the bottom
            return;
        }

        System.setSecurityManager(new SecurityManager(){

            private String allowsAlwaysOnTopPermission = SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION.getName();

            @Override
            public void checkPermission(Permission perm) {
                if (allowsAlwaysOnTopPermission.equals(perm.getName())) {
                    throw new SecurityException();
                }
            }

        });

        // Show popup as if from an applet
        // The popup shouldn't overlap the task bar. It should be shifted up.
        checkPopup();

    }

    private static void createGui() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setUndecorated(true);

        popup = new JPopupMenu("Menu");
        for (int i = 0; i < 7; i++) {
            popup.add(new JMenuItem("MenuItem"));
        }
        JPanel panel = new JPanel();
        panel.setComponentPopupMenu(popup);
        frame.add(panel);

        frame.setSize(200, 200);
    }

    private static void checkPopup() throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                // Place frame just above the task bar
                Dimension screenSize = toolkit.getScreenSize();
                frame.setLocation(screenSize.width / 2,
                        screenSize.height - frame.getHeight() - screenInsets.bottom);
                frame.setVisible(true);
            }
        });

        // Ensure frame is visible
        toolkit.realSync();

        final Point point = new Point();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                // Place popup over the task bar
                point.x = 0;
                point.y = frame.getHeight() - popup.getPreferredSize().height + screenInsets.bottom;
                popup.show(frame, point.x, point.y);
            }
        });

        // Ensure popup is visible
        toolkit.realSync();

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {
                Point frameLoc = frame.getLocationOnScreen();
                if (popup.getLocationOnScreen().equals(new Point(frameLoc.x, frameLoc.y + point.y))) {
                    throw new RuntimeException("Popup is not shifted");
                }
                popup.setVisible(false);
                frame.dispose();
            }
        });
    }
}