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/*
* Copyright (c) 2016, 2025, 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 8074883
* @summary Tab key should move to focused button in a button group
* @run main ButtonGroupFocusTest
*/
import java.awt.AWTEvent;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.KeyboardFocusManager;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.concurrent.CountDownLatch;
import javax.imageio.ImageIO;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;
import static java.awt.KeyboardFocusManager.getCurrentKeyboardFocusManager;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
public final class ButtonGroupFocusTest {
private static JRadioButton button1;
private static JRadioButton button2;
private static JRadioButton button3;
private static JRadioButton button4;
private static JRadioButton button5;
private static final CountDownLatch button2FocusLatch = new CountDownLatch(1);
private static final CountDownLatch button3FocusLatch = new CountDownLatch(1);
private static final CountDownLatch button4FocusLatch = new CountDownLatch(1);
private static final CountDownLatch button2FocusLatch2 = new CountDownLatch(2);
private static final long FOCUS_TIMEOUT = 4;
private static JFrame frame;
public static void main(String[] args) throws Exception {
final Robot robot = new Robot();
SwingUtilities.invokeAndWait(() -> {
frame = new JFrame("ButtonGroupFocusTest");
Container contentPane = frame.getContentPane();
contentPane.setLayout(new FlowLayout());
button1 = new JRadioButton("Button 1");
contentPane.add(button1);
button2 = new JRadioButton("Button 2");
contentPane.add(button2);
button3 = new JRadioButton("Button 3");
contentPane.add(button3);
button4 = new JRadioButton("Button 4");
contentPane.add(button4);
button5 = new JRadioButton("Button 5");
contentPane.add(button5);
ButtonGroup group = new ButtonGroup();
group.add(button1);
group.add(button2);
group.add(button3);
group = new ButtonGroup();
group.add(button4);
group.add(button5);
button2.addFocusListener(new LatchFocusListener(button2FocusLatch));
button3.addFocusListener(new LatchFocusListener(button3FocusLatch));
button4.addFocusListener(new LatchFocusListener(button4FocusLatch));
button2.addFocusListener(new LatchFocusListener(button2FocusLatch2));
button2.setSelected(true);
// Debugging aid: log focus owner changes...
KeyboardFocusManager focusManager = getCurrentKeyboardFocusManager();
focusManager.addPropertyChangeListener("focusOwner",
e -> System.out.println(e.getPropertyName()
+ "\n\t" + e.getOldValue()
+ "\n\t" + e.getNewValue()));
// ...and dispatched key events
Toolkit.getDefaultToolkit().addAWTEventListener(
e -> System.out.println("Dispatched " + e),
AWTEvent.KEY_EVENT_MASK);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
});
try {
if (!button2FocusLatch.await(FOCUS_TIMEOUT, SECONDS)) {
throw new RuntimeException("Button 2 should get focus "
+ "after activation");
}
robot.waitForIdle();
robot.delay(200);
System.out.println("\n\n*** Tab 1st");
robot.keyPress(KeyEvent.VK_TAB);
robot.keyRelease(KeyEvent.VK_TAB);
if (!button4FocusLatch.await(FOCUS_TIMEOUT, SECONDS)) {
throw new RuntimeException("Button 4 should get focus");
}
robot.waitForIdle();
robot.delay(200);
if (button2FocusLatch2.await(1, MILLISECONDS)) {
throw new RuntimeException("Focus moved back to Button 2");
}
SwingUtilities.invokeAndWait(() -> button3.setSelected(true));
robot.waitForIdle();
robot.delay(200);
System.out.println("\n\n*** Tab 2nd");
robot.keyPress(KeyEvent.VK_TAB);
robot.keyRelease(KeyEvent.VK_TAB);
if (!button3FocusLatch.await(FOCUS_TIMEOUT, SECONDS)) {
throw new RuntimeException("Selected Button 3 should get focus");
}
} catch (Exception e) {
BufferedImage image = robot.createScreenCapture(getFrameBounds());
ImageIO.write(image, "png",
new File("image.png"));
SwingUtilities.invokeAndWait(() ->
System.err.println("Current focus owner: "
+ getCurrentKeyboardFocusManager()
.getFocusOwner()));
throw e;
} finally {
SwingUtilities.invokeAndWait(frame::dispose);
}
}
private static Rectangle getFrameBounds() throws Exception {
Rectangle[] bounds = new Rectangle[1];
SwingUtilities.invokeAndWait(() -> bounds[0] = frame.getBounds());
return bounds[0];
}
private static final class LatchFocusListener extends FocusAdapter {
private final CountDownLatch focusGainedLatch;
private LatchFocusListener(CountDownLatch focusGainedLatch) {
this.focusGainedLatch = focusGainedLatch;
}
@Override
public void focusGained(FocusEvent e) {
focusGainedLatch.countDown();
}
}
}
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