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.EventQueue;
  25 import java.awt.GraphicsEnvironment;
  26 import java.awt.Toolkit;
  27 import java.lang.reflect.Method;
  28 import java.util.concurrent.CountDownLatch;
  29 
  30 import javax.swing.JButton;
  31 import javax.swing.JFrame;
  32 
  33 import sun.awt.DisplayChangedListener;
  34 import sun.awt.SunToolkit;
  35 
  36 /**
  37  * @test
  38  * @key headful
  39  * @bug 8207070
  40  * @modules java.desktop/sun.java2d
  41  *          java.desktop/sun.awt
  42  */
  43 public final class DisplayChangesException {
  44 
  45     private static boolean fail;
  46     private static CountDownLatch go = new CountDownLatch(1);
  47 
  48     static final class TestThread extends Thread {
  49 
  50         private JFrame frame;
  51 
  52         private TestThread(ThreadGroup tg, String threadName) {
  53             super(tg, threadName);
  54         }
  55 
  56         public void run() {
  57             try {
  58                 test();
  59             } catch (final Exception e) {
  60                 throw new RuntimeException(e);
  61             }
  62         }
  63 
  64         private void test() throws Exception {
  65             SunToolkit.createNewAppContext();
  66             EventQueue.invokeAndWait(() -> {
  67                 frame = new JFrame();
  68                 final JButton b = new JButton();
  69                 b.addPropertyChangeListener(evt -> {
  70                     if (!SunToolkit.isDispatchThreadForAppContext(b)) {
  71                         System.err.println("Wrong thread:" + currentThread());
  72                         fail = true;
  73                     }
  74                 });
  75                 frame.add(b);
  76                 frame.setSize(100, 100);
  77                 frame.setLocationRelativeTo(null);
  78                 frame.pack();
  79             });
  80             go.await();
  81             EventQueue.invokeAndWait(() -> {
  82                 frame.dispose();
  83             });
  84         }
  85     }
  86 
  87     public static void main(final String[] args) throws Exception {
  88         ThreadGroup tg0 = new ThreadGroup("ThreadGroup0");
  89         ThreadGroup tg1 = new ThreadGroup("ThreadGroup1");
  90 
  91         TestThread t0 = new TestThread(tg0, "TestThread 0");
  92         TestThread t1 = new TestThread(tg1, "TestThread 1");
  93 
  94         t0.start();
  95         t1.start();
  96         Thread.sleep(1500); // Cannot use Robot.waitForIdle
  97         testToolkit();
  98         Thread.sleep(1500);
  99         testGE();
 100         Thread.sleep(1500);
 101         go.countDown();
 102 
 103         if (fail) {
 104             throw new RuntimeException();
 105         }
 106     }
 107 
 108     private static void testGE() {
 109         Object ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 110         if (!(ge instanceof DisplayChangedListener)) {
 111             return;
 112         }
 113         ((DisplayChangedListener) ge).displayChanged();
 114     }
 115 
 116     private static void testToolkit() {
 117         final Class toolkit;
 118         try {
 119             toolkit = Class.forName("sun.awt.windows.WToolkit");
 120         } catch (final ClassNotFoundException ignored) {
 121             return;
 122         }
 123         try {
 124             final Method displayChanged = toolkit.getMethod("displayChanged");
 125             displayChanged.invoke(Toolkit.getDefaultToolkit());
 126         } catch (final Exception e) {
 127             e.printStackTrace();
 128             fail = true;
 129         }
 130     }
 131 }