1 /*
   2  * Copyright (c) 2013, 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.AWTException;
  25 import java.awt.Color;
  26 import java.awt.Frame;
  27 import java.awt.Graphics;
  28 import java.awt.Point;
  29 import java.awt.Robot;
  30 import java.awt.Toolkit;
  31 import java.awt.Window;
  32 
  33 import sun.awt.SunToolkit;
  34 
  35 /**
  36  * @test
  37  * @bug 8001472
  38  * @summary Background of the window should not depend from the paint()/update()
  39  * @author Sergey Bylokhov
  40  */
  41 public final class BackgroundIsNotUpdated extends Window {
  42 
  43     public BackgroundIsNotUpdated(final Frame owner) {
  44         super(owner);
  45     }
  46 
  47     @Override
  48     public void paint(final Graphics ignored) {
  49         // Intentionally left blank
  50     }
  51 
  52     @Override
  53     public void update(final Graphics ignored) {
  54         // Intentionally left blank
  55     }
  56 
  57     public static void main(final String[] args) throws AWTException {
  58         final Window window = new BackgroundIsNotUpdated(null);
  59         window.setSize(300, 300);
  60         window.setLocationRelativeTo(null);
  61         window.setVisible(true);
  62         sleep();
  63         window.setBackground(Color.GREEN);
  64         sleep();
  65         final Robot robot = new Robot();
  66         robot.setAutoDelay(200);
  67         Point point = window.getLocationOnScreen();
  68         Color color = robot.getPixelColor(point.x + window.getWidth() / 2,
  69                                           point.y + window.getHeight() / 2);
  70         window.dispose();
  71         if (!color.equals(Color.GREEN)) {
  72             throw new RuntimeException(
  73                     "Expected: " + Color.GREEN + " , Actual: " + color);
  74         }
  75     }
  76 
  77     private static void sleep() {
  78         try {
  79             ((SunToolkit) Toolkit.getDefaultToolkit()).realSync();
  80             Thread.sleep(1000);
  81         } catch (InterruptedException ignored) {
  82         }
  83     }
  84 }