ItemEventTest.java

/*
 * Copyright (c) 2016, 2016, 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.
 */

/*
 * @test
 * @key headful
 * @bug 8033936 8172510
 * @summary Verify that correct ItemEvent is received while selection &
 *          deselection of multi select List items.
 */

import java.awt.AWTException;
import java.awt.Event;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.List;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.KeyEvent;
import java.awt.event.InputEvent;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

public class ItemEventTest extends Frame
{
    List list;
    final String expectedSelectionOrder;
    StringBuilder actualSelectionOrder;
    Robot robot;

    public ItemEventTest()
    {
        try {
            robot = new Robot();
        } catch(AWTException e) {
            throw new RuntimeException(e.getMessage());
        }
        expectedSelectionOrder = "01230123";

        list = new List(4, true);
        list.add("0");
        list.add("1");
        list.add("2");
        list.add("3");

        add(list);
        setSize(400,400);
        setLayout(new FlowLayout());
        pack();
        setVisible(true);
        robot.waitForIdle();
    }

    @Override
    public boolean handleEvent(Event e) {
        if (e.target instanceof List) {
            if (e.id == Event.LIST_DESELECT || e.id == Event.LIST_SELECT) {
                actualSelectionOrder.append(e.arg);
            }
        }
        return true;
    }

    void testHandleEvent() {
        // When no ItemListener is added to List, parent's handleEvent is
        // called with ItemEvent.
        performTest();
    }

    void testItemListener() {
        list.addItemListener(new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent ie) {
                actualSelectionOrder.append(ie.getItem());
            }
        });
        performTest();
    }

    void performTest() {
        actualSelectionOrder = new StringBuilder();
        Point loc = list.getLocationOnScreen();
        Rectangle rect = list.getBounds();
        int dY = rect.height / list.getItemCount();
        loc = new Point(loc.x + 10, loc.y + 5);

        String osName = System.getProperty("os.name");
        boolean isMac = osName.contains("Mac") || osName.contains("mac");
        if(isMac) {
            robot.keyPress(KeyEvent.VK_META);
            robot.waitForIdle();
        }

        // First loop to select & Second loop to deselect the list items.
        for (int j = 0; j < 2; ++j) {
            for (int i = 0; i < list.getItemCount(); ++i) {
                robot.mouseMove(loc.x, loc.y + i * dY);
                robot.waitForIdle();
                robot.mousePress(InputEvent.BUTTON1_MASK);
                robot.waitForIdle();
                robot.mouseRelease(InputEvent.BUTTON1_MASK);
                robot.waitForIdle();
            }
        }

        if(isMac) {
            robot.keyRelease(KeyEvent.VK_META);
        }

        if (!expectedSelectionOrder.equals(actualSelectionOrder.toString())) {
            dispose();
            throw new RuntimeException("ItemEvent for selection & deselection"
                + " of multi select List's item is not correct"
                + " Expected : " + expectedSelectionOrder
                + " Actual : " + actualSelectionOrder);
        }
    }

    public static void main(String args[]) {
       ItemEventTest test = new ItemEventTest();
       test.testHandleEvent();
       test.testItemListener();
       test.dispose();
    }
}