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 }