1 /* 2 * Copyright (c) 2006, 2008, 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.DisplayMode; 25 import java.awt.EventQueue; 26 import java.awt.Frame; 27 import java.awt.GraphicsDevice; 28 import java.awt.GraphicsEnvironment; 29 import java.lang.reflect.InvocationTargetException; 30 31 /** 32 * Used by the UninitializedDisplayModeChangeTest to change the 33 * display mode. 34 */ 35 public class DisplayModeChanger { 36 main(String[] args)37 public static void main(String[] args) 38 throws InterruptedException, InvocationTargetException 39 { 40 final GraphicsDevice gd = 41 GraphicsEnvironment.getLocalGraphicsEnvironment(). 42 getDefaultScreenDevice(); 43 44 EventQueue.invokeAndWait(new Runnable() { 45 public void run() { 46 Frame f = null; 47 if (gd.isFullScreenSupported()) { 48 try { 49 f = new Frame("DisplayChanger Frame"); 50 gd.setFullScreenWindow(f); 51 if (gd.isDisplayChangeSupported()) { 52 DisplayMode dm = findDisplayMode(gd); 53 if (gd != null) { 54 gd.setDisplayMode(dm); 55 } 56 } 57 try { 58 Thread.sleep(1000); 59 } catch (InterruptedException ex) { 60 ex.printStackTrace(); 61 } 62 gd.setFullScreenWindow(null); 63 } finally { 64 if (f != null) { 65 f.dispose(); 66 } 67 } 68 } 69 } 70 }); 71 } 72 73 /** 74 * Finds a display mode that is different from the current display 75 * mode and is likely to cause a display change event. 76 */ findDisplayMode(GraphicsDevice gd)77 private static DisplayMode findDisplayMode(GraphicsDevice gd) { 78 DisplayMode dms[] = gd.getDisplayModes(); 79 DisplayMode currentDM = gd.getDisplayMode(); 80 for (DisplayMode dm : dms) { 81 if (!dm.equals(currentDM) && 82 dm.getRefreshRate() == currentDM.getRefreshRate()) 83 { 84 // different from the current dm and refresh rate is the same 85 // means that something else is different => more likely to 86 // cause a DM change event 87 return dm; 88 } 89 } 90 return null; 91 } 92 93 } 94