/*

 * 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 javax.swing.*;

import java.awt.*;

public class ScrollBarThumbVisibleTest

{

    private static JFrame frame;

    private static Point point;

    private static JScrollBar bar;

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

        for (UIManager.LookAndFeelInfo info : UIManager

                .getInstalledLookAndFeels()) {

            if ("Nimbus".equals(info.getName())) {

                try {

                    UIManager.setLookAndFeel(info.getClassName());

                } catch (Exception ex) {

                }

                break;

            }

        }

        try {

            SwingUtilities.invokeAndWait(new Runnable() {

                public void run() {

                    frame = new JFrame();

                    frame.setUndecorated(true);

                    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                    setup(frame);

                }

            });

            final Robot robot = new Robot();

            robot.delay(200);

            robot.waitForIdle();

            SwingUtilities.invokeAndWait(new Runnable() {

                @Override

                public void run() {

                    point = bar.getLocationOnScreen();

                }

            });

            Color color1 = robot.getPixelColor(point.x + 48, point.y + 55);

            Color color2 = robot.getPixelColor(point.x + 48, point.y + 125);

            System.out.println(color1);

            System.out.println(color2);

           if (color1.equals(color2)) {

                throw new RuntimeException("Thump is not visible");

            }

        } finally {

            SwingUtilities.invokeAndWait(new Runnable() {

                @Override

                public void run() {

                }

            });

        }

        System.out.println("ok");

    }

    static void setup(JFrame frame) {

        bar = new JScrollBar(Adjustable.VERTICAL, 500, 0, 0, 1000);

        frame.getContentPane().add(bar);

        frame.setSize(50, 250);

        frame.setLocation(100, 100);

        frame.setVisible(true);

    }

}