1 /*

     2  * Copyright (c) 2014, 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.Component;

    27 import java.awt.Frame;

    28 import java.awt.Graphics;

    29 import java.awt.Label;

    30 import java.awt.Point;

    31 import java.awt.Robot;

    32 import java.awt.Toolkit;

    33 

    34 import sun.awt.SunToolkit;

    35 

    36 /**

    37  * @test

    38  * @bug 7157680

    39  * @author Sergey Bylokhov

    40  */

    41 public final class PaintNativeOnUpdate extends Label {

    42 

    43     private boolean fullUpdate = true;

    44 

    45     public static void main(final String[] args) throws AWTException {

    46         final Frame frame = new Frame();

    47         final Component label = new PaintNativeOnUpdate();

    48         frame.setBackground(Color.RED);

    49         frame.add(label);

    50         frame.setSize(300, 300);

    51         frame.setUndecorated(true);

    52         frame.setLocationRelativeTo(null);

    53         frame.setVisible(true);

    54         sleep();

    55         label.repaint();// first paint

    56         sleep();

    57         label.repaint();// incremental paint

    58         sleep();

    59 

    60         Robot robot = new Robot();

    61         robot.setAutoDelay(50);

    62         Point point = label.getLocationOnScreen();

    63         Color color = robot.getPixelColor(point.x + label.getWidth() / 2,

    64                                           point.y + label.getHeight() / 2);

    65         if (!color.equals(Color.GREEN)) {

    66             System.err.println("Expected color = " + Color.GREEN);

    67             System.err.println("Actual color = " + color);

    68             throw new RuntimeException();

    69         }

    70         frame.dispose();

    71     }

    72 

    73     @Override

    74     public void update(final Graphics g) {

    75         if (fullUpdate) {

    76             //full paint

    77             g.setColor(Color.GREEN);

    78             g.fillRect(0, 0, getWidth(), getHeight());

    79             fullUpdate = false;

    80         } else {

    81             // Do nothing

    82             // incremental paint

    83         }

    84     }

    85 

    86     @Override

    87     public void paint(final Graphics g) {

    88         // Do nothing

    89     }

    90 

    91     private static void sleep() {

    92         try {

    93             ((SunToolkit) (Toolkit.getDefaultToolkit())).realSync();

    94             Thread.sleep(1000);

    95         } catch (InterruptedException ignored) {

    96         }

    97     }

    98 }