RobotWheelTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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import java.awt.Button;
import java.awt.Frame;
import java.awt.Rectangle;
import java.awt.Robot;
import jdk.testlibrary.OSInfo;

/*
 * @test 1.2 98/08/05
 * @key headful
 * @bug 4373478 8079255
 * @summary Test mouse wheel functionality of Robot
 * @author bchristi: area=Robot
 * @library ../../../../lib/testlibrary
 * @build jdk.testlibrary.OSInfo
 * @run main RobotWheelTest
 */
public class RobotWheelTest {

    private static final int NUMTESTS = 20;
    private static volatile int wheelRotation;

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

        Frame frame = null;
        try {
            int wheelSign = OSInfo.getOSType().equals(OSInfo.OSType.MACOSX) ? -1 : 1;

            frame = new Frame();
            frame.setSize(200, 200);
            Button button = new Button("WheelButton");
            button.addMouseWheelListener(e -> wheelRotation = e.getWheelRotation());
            frame.add(button);
            frame.setVisible(true);

            Robot robot = new Robot();
            robot.setAutoDelay(100);
            robot.waitForIdle();

            Rectangle bounds = frame.getBounds();
            int centerX = bounds.x + bounds.width / 2;
            int centerY = bounds.y + bounds.height / 2;
            robot.mouseMove(centerX, centerY);
            robot.waitForIdle();

            for (int i = -NUMTESTS; i <= NUMTESTS; i++) {
                if (i == 0) {
                    continue;
                }
                robot.mouseWheel(i);
                robot.waitForIdle();
                if (i != wheelSign * wheelRotation) {
                    throw new RuntimeException("wheelRotation = " + wheelRotation
                            + ", expected value = " + i);
                }
            }
        } finally {
            if (frame != null) {
                frame.dispose();
            }
        }
    }
}