1 /*
   2  * Copyright (c) 2013, 2016, 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  * @key headful
  38  * @bug 8001472
  39  * @summary Background of the window should not depend from the paint()/update()
  40  * @author Sergey Bylokhov
  41  */
  42 public final class BackgroundIsNotUpdated extends Window {
  43 
  44     public BackgroundIsNotUpdated(final Frame owner) {
  45         super(owner);
  46     }
  47 
  48     @Override
  49     public void paint(final Graphics ignored) {
  50         // Intentionally left blank
  51     }
  52 
  53     @Override
  54     public void update(final Graphics ignored) {
  55         // Intentionally left blank
  56     }
  57 
  58     public static void main(final String[] args) throws AWTException {
  59         final Window window = new BackgroundIsNotUpdated(null);
  60         window.setSize(300, 300);
  61         window.setLocationRelativeTo(null);
  62         window.setVisible(true);
  63         sleep();
  64         window.setBackground(Color.GREEN);
  65         sleep();
  66         final Robot robot = new Robot();
  67         robot.setAutoDelay(200);
  68         Point point = window.getLocationOnScreen();
  69         Color color = robot.getPixelColor(point.x + window.getWidth() / 2,
  70                                           point.y + window.getHeight() / 2);
  71         window.dispose();
  72         if (!color.equals(Color.GREEN)) {
  73             throw new RuntimeException(
  74                     "Expected: " + Color.GREEN + " , Actual: " + color);
  75         }
  76     }
  77 
  78     private static void sleep() {
  79         try {
  80             ((SunToolkit) Toolkit.getDefaultToolkit()).realSync();
  81             Thread.sleep(1000);
  82         } catch (InterruptedException ignored) {
  83         }
  84     }
  85 }