test/jdk/java/awt/Robot/RobotScrollTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 *
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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/*
 * @test
 * @bug 4374578
 * @summary Test robot wheel scrolling of Text
 * @requires (os.family == "Windows") | (os.family == "linux")
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual RobotScrollTest
*/

import java.awt.Frame;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.TextArea;

public class RobotScrollTest {

    static TextArea ta;
    static Robot robot;

    private static final String INSTRUCTIONS = """
         0. DON'T TOUCH ANYTHING!
         1. This test is for Windows and Linux only.
         2. Just sit back, and watch the Robot move the mouse to the TextArea.
         3. Once the pointer is on the text area, the Robot will use the mouse wheel
            to scroll the text.
            If the text scrolled, press PASS, else, press FAIL.""";

    public static void main(String[] args) throws Exception {
        robot = new Robot();
        robot.setAutoDelay(100);
        PassFailJFrame passFail = new PassFailJFrame(INSTRUCTIONS);
        createTestUI();
        passFail.awaitAndCheck();
    }

    private static void createTestUI() {
        Frame f = new Frame("RobotScrollTest");
        ta = new TextArea();
        for (int i = 0; i < 100; i++) {
            ta.append(i + "\n");
        }
        f.add(ta);
        f.setLocation(0, 400);
        f.pack();
        PassFailJFrame.addTestWindow(f);
        PassFailJFrame.positionTestWindow(f, PassFailJFrame.Position.HORIZONTAL);
        f.setVisible(true);
        doTest();
    }

    private static void doTest() {
        robot.waitForIdle();
        robot.delay(1000);
        // get loc of TextArea
        Point taAt = ta.getLocationOnScreen();
        // get bounds of button
        Rectangle bounds = ta.getBounds();

        // move mouse to middle of button
        robot.mouseMove(taAt.x + bounds.width / 2,
                        taAt.y + bounds.height / 2);

        // rotate wheel a few times
        for (int j = 1; j < 8; j++) {
            for (int k = 0; k < 5; k++) {
                robot.mouseWheel(j);
            }

            for (int k = 0; k < 5; k++) {
                robot.mouseWheel(-1 * j);
            }
        }
    }

}