/*

 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.awt.AWTException;

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.Point;

import java.awt.Robot;

import java.awt.Toolkit;

import java.awt.Window;

import sun.awt.SunToolkit;

/**

 * @test

 * @bug 8001472

 * @summary Background of the window should not depend from the paint()/update()

 * @author Sergey Bylokhov

 */

public final class BackgroundIsNotUpdated extends Window {

    public BackgroundIsNotUpdated(final Frame owner) {

        super(owner);

    }

    @Override

    public void paint(final Graphics ignored) {

        // Intentionally left blank

    }

    @Override

    public void update(final Graphics ignored) {

        // Intentionally left blank

    }

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

        final Window window = new BackgroundIsNotUpdated(null);

        window.setSize(300, 300);

        window.setLocationRelativeTo(null);

        window.setVisible(true);

        sleep();

        window.setBackground(Color.GREEN);

        sleep();

        final Robot robot = new Robot();

        robot.setAutoDelay(200);

        Point point = window.getLocationOnScreen();

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

                                          point.y + window.getHeight() / 2);

        window.dispose();

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

            throw new RuntimeException(

                    "Expected: " + Color.GREEN + " , Actual: " + color);

        }

    }

    private static void sleep() {

        try {

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

            Thread.sleep(1000);

        } catch (InterruptedException ignored) {

        }

    }

}