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Java example source code file (bug7004134.java)

This example Java source code file (bug7004134.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, component, event, exception, field, gui, html\-formatted, jframe, jlabel, mouseevent, popup, reflection, runnable, runtimeexception, suntoolkit, swing, thread, threadgroup, tooltipmanager

The bug7004134.java Java example source code

/*
 * Copyright (c) 2010, 2011, 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 7004134
   @summary JLabel containing a ToolTipText does no longer show ToolTip after browser refresh
   @author Pavel Porvatov
*/

import sun.awt.SunToolkit;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.lang.reflect.Field;

public class bug7004134 {
    private static volatile JFrame frame;

    private static volatile JLabel label;

    private static volatile int toolTipWidth;

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                label = new JLabel("A JLabel used as object for an HTML-formatted tooltip");
                label.setToolTipText("<html>An HTML-formatted ToolTip");

                frame = new JFrame();

                frame.add(label);
                frame.pack();
                frame.setVisible(true);
            }
        });

        ((SunToolkit) SunToolkit.getDefaultToolkit()).realSync();

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                ToolTipManager toolTipManager = ToolTipManager.sharedInstance();

                toolTipManager.setInitialDelay(0);
                toolTipManager.mouseMoved(new MouseEvent(label, 0, 0, 0, 0, 0, 0, false));
            }
        });

        Thread.sleep(500);

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                toolTipWidth = getTipWindow().getWidth();

                frame.dispose();
            }
        });

        Thread thread = new Thread(new ThreadGroup("Some ThreadGroup"), new Runnable() {
            public void run() {
                SunToolkit.createNewAppContext();

                try {
                    SwingUtilities.invokeAndWait(new Runnable() {
                        public void run() {
                            frame = new JFrame();

                            frame.add(label);
                            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                            frame.pack();
                            frame.setVisible(true);
                        }
                    });

                    ((SunToolkit) SunToolkit.getDefaultToolkit()).realSync();

                    SwingUtilities.invokeAndWait(new Runnable() {
                        public void run() {
                            ToolTipManager toolTipManager = ToolTipManager.sharedInstance();

                            toolTipManager.setInitialDelay(0);
                            toolTipManager.mouseMoved(new MouseEvent(label, 0, 0, 0, 0, 0, 0, false));
                        }
                    });

                    Thread.sleep(500);

                    SwingUtilities.invokeAndWait(new Runnable() {
                        public void run() {
                            int newToolTipWidth = getTipWindow().getWidth();

                            frame.dispose();

                            if (toolTipWidth != newToolTipWidth) {
                                throw new RuntimeException("Tooltip width is different. Initial: " + toolTipWidth +
                                        ", new: " + newToolTipWidth);
                            }
                        }
                    });
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }

            }
        });

        thread.start();
        thread.join();
    }

    private static Component getTipWindow() {
        try {
            Field tipWindowField = ToolTipManager.class.getDeclaredField("tipWindow");

            tipWindowField.setAccessible(true);

            Popup value = (Popup) tipWindowField.get(ToolTipManager.sharedInstance());

            Field componentField = Popup.class.getDeclaredField("component");

            componentField.setAccessible(true);

            return (Component) componentField.get(value);
        } catch (Exception e) {
            throw new RuntimeException("getToolTipComponent failed", e);
        }
    }
}

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