Java example source code file (bug4199622.java)

This example Java source code file (bug4199622.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

actionlistener, awt, awtexception, can\'t, event, gui, interruptedexception, invocationtargetexception, jcombobox, jframe, override, reflection, robot, runnable, runtimeexception, suntoolkit, swing, test, unsupportedlookandfeelexception

The bug4199622.java Java example source code

/*
 * Copyright (c) 2013, 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 4199622
   @summary RFE: JComboBox shouldn't send ActionEvents for keyboard navigation
   @author Vladislav Karnaukhov
   @run main bug4199622
*/

import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;
import sun.awt.OSInfo;
import sun.awt.SunToolkit;

import javax.swing.*;
import javax.swing.plaf.metal.MetalLookAndFeel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.lang.reflect.InvocationTargetException;

public class bug4199622 extends JFrame implements ActionListener {

    static final int nElems = 20;
    static JComboBox<String> cb = null;

    bug4199622(LookAndFeel laf) {
        super();

        try {
            UIManager.setLookAndFeel(laf);
        } catch (UnsupportedLookAndFeelException e) {
            throw new RuntimeException("Test failed", e);
        }

        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        cb = new JComboBox<>();
        for (int i = 0; i < nElems; i++) {
            cb.addItem(String.valueOf(i + 1));
        }
        cb.addActionListener(this);
        add(cb);

        setSize(300, 300);
        pack();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (UIManager.getBoolean("ComboBox.noActionOnKeyNavigation") && cb.isPopupVisible()) {
            throw new RuntimeException("Test failed. actionPerformed generated");
        }
    }

    static Robot robot = null;
    static SunToolkit toolkit = null;

    static void doTest() {
        if (robot == null) {
            try {
                robot = new Robot();
                robot.setAutoDelay(20);
            } catch (AWTException e) {
                throw new RuntimeException("Can't create robot. Test failed", e);
            }
        }

        toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
        if (toolkit == null) {
            throw new RuntimeException("Can't get the toolkit. Test failed");
        }
        toolkit.realSync();

        doActualTest();

        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    cb.hidePopup();
                    cb.setEditable(true);
                    cb.updateUI();
                }
            });
        } catch (InterruptedException e) {
            throw new RuntimeException("Test failed", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Test failed", e);
        }

        toolkit.realSync();
        doActualTest();
    }

    static void doActualTest() {
        UIManager.put("ComboBox.noActionOnKeyNavigation", true);
        doTestUpDown();
        UIManager.put("ComboBox.noActionOnKeyNavigation", false);
        doTestUpDown();

        UIManager.put("ComboBox.noActionOnKeyNavigation", true);
        doTestPgUpDown();
        UIManager.put("ComboBox.noActionOnKeyNavigation", false);
        doTestPgUpDown();

        UIManager.put("ComboBox.noActionOnKeyNavigation", true);
        doTestHomeEnd();
        UIManager.put("ComboBox.noActionOnKeyNavigation", false);
        doTestHomeEnd();
    }

    static void doTestHomeEnd() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    cb.hidePopup();
                    cb.setSelectedIndex(0);
                }
            });
        } catch (InterruptedException e) {
            throw new RuntimeException("Test failed", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Test failed", e);
        }
        toolkit.realSync();

        robot.keyPress(KeyEvent.VK_END);
        toolkit.realSync();
        robot.keyPress(KeyEvent.VK_HOME);
        toolkit.realSync();
    }

    static void doTestUpDown() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    cb.hidePopup();
                    cb.setSelectedIndex(0);
                }
            });
        } catch (InterruptedException e) {
            throw new RuntimeException("Test failed", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Test failed", e);
        }
        toolkit.realSync();

        for (int i = 0; i < nElems; i++) {
            robot.keyPress(KeyEvent.VK_DOWN);
            toolkit.realSync();
        }

        for (int i = 0; i < nElems; i++) {
            robot.keyPress(KeyEvent.VK_UP);
            toolkit.realSync();
        }
    }

    static void doTestPgUpDown() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    cb.hidePopup();
                    cb.setSelectedIndex(0);
                }
            });
        } catch (InterruptedException e) {
            throw new RuntimeException("Test failed", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Test failed", e);
        }
        toolkit.realSync();

        int listHeight = cb.getMaximumRowCount();
        for (int i = 0; i < nElems; i += listHeight) {
            robot.keyPress(KeyEvent.VK_PAGE_DOWN);
            toolkit.realSync();
        }

        for (int i = 0; i < nElems; i += listHeight) {
            robot.keyPress(KeyEvent.VK_PAGE_UP);
            toolkit.realSync();
        }
    }

    public static void main(String[] args) {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    bug4199622 test = new bug4199622(new MetalLookAndFeel());
                    test.setVisible(true);
                }
            });
        } catch (InterruptedException e) {
            throw new RuntimeException("Test failed", e);
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Test failed", e);
        }
        doTest();

        if (OSInfo.getOSType() == OSInfo.OSType.WINDOWS) {
            try {
                SwingUtilities.invokeAndWait(new Runnable() {
                    @Override
                    public void run() {
                        bug4199622 test = new bug4199622(new WindowsLookAndFeel());
                        test.setVisible(true);
                    }
                });
            } catch (InterruptedException e) {
                throw new RuntimeException("Test failed", e);
            } catch (InvocationTargetException e) {
                throw new RuntimeException("Test failed", e);
            }
            doTest();
        }
    }
}