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Java example source code file (deadKeyMacOSX.java)

This example Java source code file (deadKeyMacOSX.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

accute, acute, awt, deadkeylistener, event, excessive, frame, keyadapter, override, panel, pressed, robot, runtimeexception, suntoolkit, wrong

The deadKeyMacOSX.java Java example source code

/*
 * Copyright (c) 2012, 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
 * @bug 7196547
 * @summary Dead Key implementation for KeyEvent on Mac OS X
 * @author alexandr.scherbatiy area=awt.event
 * @run main deadKeyMacOSX
 */

import java.awt.*;
import java.awt.event.*;
import java.awt.event.KeyEvent;
import sun.awt.OSInfo;
import sun.awt.SunToolkit;

public class deadKeyMacOSX {

    private static SunToolkit toolkit;
    private static volatile int state = 0;

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

        if (OSInfo.getOSType() != OSInfo.OSType.MACOSX) {
            return;
        }

        toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        Robot robot = new Robot();
        robot.setAutoDelay(50);

        createAndShowGUI();

        // Pressed keys: Alt + E + A
        // Results:  ALT + VK_DEAD_ACUTE + a with accute accent
        robot.keyPress(KeyEvent.VK_ALT);
        robot.keyPress(KeyEvent.VK_E);
        robot.keyRelease(KeyEvent.VK_E);
        robot.keyRelease(KeyEvent.VK_ALT);

        robot.keyPress(KeyEvent.VK_A);
        robot.keyRelease(KeyEvent.VK_A);

        if (state != 3) {
            throw new RuntimeException("Wrong number of key events.");
        }
    }

    static void createAndShowGUI() {
        Frame frame = new Frame();
        frame.setSize(300, 300);
        Panel panel = new Panel();
        panel.addKeyListener(new DeadKeyListener());
        frame.add(panel);
        frame.setVisible(true);
        toolkit.realSync();

        panel.requestFocusInWindow();
        toolkit.realSync();
    }

    static class DeadKeyListener extends KeyAdapter {

        @Override
        public void keyPressed(KeyEvent e) {
            int keyCode = e.getKeyCode();
            char keyChar = e.getKeyChar();

            switch (state) {
                case 0:
                    if (keyCode != KeyEvent.VK_ALT) {
                        throw new RuntimeException("Alt is not pressed.");
                    }
                    state++;
                    break;
                case 1:
                    if (keyCode != KeyEvent.VK_DEAD_ACUTE) {
                        throw new RuntimeException("Dead ACUTE is not pressed.");
                    }
                    if (keyChar != 0xB4) {
                        throw new RuntimeException("Pressed char is not dead acute.");
                    }

                    state++;
                    break;
                case 2:
                    if (keyCode != KeyEvent.VK_A) {
                        throw new RuntimeException("A is not pressed.");
                    }
                    if (keyChar != 0xE1) {
                        throw new RuntimeException("A char does not have ACCUTE accent");
                    }
                    state++;
                    break;
                default:
                    throw new RuntimeException("Excessive keyPressed event.");
            }
        }

        @Override
        public void keyTyped(KeyEvent e) {
            int keyCode = e.getKeyCode();
            char keyChar = e.getKeyChar();

            if (state == 3) {
                if (keyCode != 0) {
                    throw new RuntimeException("Key code should be undefined.");
                }
                if (keyChar != 0xE1) {
                    throw new RuntimeException("A char does not have ACCUTE accent");
                }
            } else {
                throw new RuntimeException("Wron number of keyTyped events.");
            }
        }
    }
}

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