1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.awt.*;
  25 import java.lang.reflect.Method;
  26 import java.util.concurrent.CountDownLatch;
  27 
  28 import javax.swing.JButton;
  29 import javax.swing.JFrame;
  30 
  31 import sun.awt.DisplayChangedListener;
  32 import sun.awt.SunToolkit;
  33 
  34 /**
  35  * @test
  36  * @key headful 
  37  * @bug 8207070
  38  * @modules java.desktop/sun.java2d
  39  *          java.desktop/sun.awt
  40  */
  41 public final class DisplayChangesException {
  42 
  43     private static boolean fail;
  44     private static CountDownLatch go = new CountDownLatch(1);
  45 
  46     static final class TestThread extends Thread {
  47 
  48         private JFrame frame;
  49 
  50         private TestThread(ThreadGroup tg, String threadName) {
  51             super(tg, threadName);
  52         }
  53 
  54         public void run() {
  55             try {
  56                 test();
  57             } catch (final Exception e) {
  58                 throw new RuntimeException(e);
  59             }
  60         }
  61 
  62         private void test() throws Exception {
  63             SunToolkit.createNewAppContext();
  64             EventQueue.invokeAndWait(() -> {
  65                 frame = new JFrame();
  66                 final JButton b = new JButton();
  67                 b.addPropertyChangeListener(evt -> {
  68                     if (!SunToolkit.isDispatchThreadForAppContext(b)) {
  69                         System.err.println("Wrong thread:" + currentThread());
  70                         fail = true;
  71                     }
  72                 });
  73                 frame.add(b);
  74                 frame.setSize(100, 100);
  75                 frame.setLocationRelativeTo(null);
  76                 frame.pack();
  77             });
  78             go.await();
  79             EventQueue.invokeAndWait(() -> {
  80                 frame.dispose();
  81             });
  82         }
  83     }
  84 
  85     public static void main(final String[] args) throws Exception {
  86         ThreadGroup tg0 = new ThreadGroup("ThreadGroup0");
  87         ThreadGroup tg1 = new ThreadGroup("ThreadGroup1");
  88 
  89         TestThread t0 = new TestThread(tg0, "TestThread 0");
  90         TestThread t1 = new TestThread(tg1, "TestThread 1");
  91 
  92         t0.start();
  93         t1.start();
  94         Thread.sleep(1500); // Cannot use Robot.waitForIdle
  95         testToolkit();
  96         Thread.sleep(1500);
  97         testGE();
  98         Thread.sleep(1500);
  99         go.countDown();
 100 
 101         if (fail) {
 102             throw new RuntimeException();
 103         }
 104     }
 105 
 106     private static void testGE() {
 107         Object ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 108         if (!(ge instanceof DisplayChangedListener)) {
 109             return;
 110         }
 111         ((DisplayChangedListener) ge).displayChanged();
 112     }
 113 
 114     private static void testToolkit() {
 115         final Class toolkit;
 116         try {
 117             toolkit = Class.forName("sun.awt.windows.WToolkit");
 118         } catch (final ClassNotFoundException ignored) {
 119             return;
 120         }
 121         try {
 122             final Method displayChanged = toolkit.getMethod("displayChanged");
 123             displayChanged.invoke(Toolkit.getDefaultToolkit());
 124         } catch (final Exception e) {
 125             e.printStackTrace();
 126             fail = true;
 127         }
 128     }
 129 }
 130