6733718: test /java/awt/FullScreen/UninitializedDisplayModeChangeTest/ fails

Reviewed-by: igor

test/java/awt/FullScreen/UninitializedDisplayModeChangeTest/DisplayModeChanger.java

+/*
+ * Copyright 2006-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import java.awt.DisplayMode;
+import java.awt.EventQueue;
+import java.awt.Frame;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * Used by the UninitializedDisplayModeChangeTest to change the
+ * display mode.
+ */
+public class DisplayModeChanger {
+
+    public static void main(String[] args)
+        throws InterruptedException, InvocationTargetException
+    {
+        final GraphicsDevice gd =
+            GraphicsEnvironment.getLocalGraphicsEnvironment().
+                getDefaultScreenDevice();
+
+        EventQueue.invokeAndWait(new Runnable() {
+            public void run() {
+                Frame f = null;
+                if (gd.isFullScreenSupported()) {
+                    try {
+                        f = new Frame("DisplayChanger Frame");
+                        gd.setFullScreenWindow(f);
+                        if (gd.isDisplayChangeSupported()) {
+                            DisplayMode dm = findDisplayMode(gd);
+                            if (gd != null) {
+                                gd.setDisplayMode(dm);
+                            }
+                        }
+                        try {
+                            Thread.sleep(1000);
+                        } catch (InterruptedException ex) {
+                            ex.printStackTrace();
+                        }
+                        gd.setFullScreenWindow(null);
+                    } finally {
+                        if (f != null) {
+                            f.dispose();
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+    /**
+     * Finds a display mode that is different from the current display
+     * mode and is likely to cause a display change event.
+     */
+    private static DisplayMode findDisplayMode(GraphicsDevice gd) {
+        DisplayMode dms[] = gd.getDisplayModes();
+        DisplayMode currentDM = gd.getDisplayMode();
+        for (DisplayMode dm : dms) {
+            if (!dm.equals(currentDM) &&
+                 dm.getRefreshRate() == currentDM.getRefreshRate())
+            {
+                // different from the current dm and refresh rate is the same
+                // means that something else is different => more likely to
+                // cause a DM change event
+                return dm;
+            }
+        }
+        return null;
+    }
+
+}