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/*
* Copyright (c) 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
* @bug 8356594
* @key headful
* @summary Verifies if JSplitPane loses divider location when
* reopened via JOptionPane.createDialog()
* @run main TestSplitPaneResetDividerLoc
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestSplitPaneResetDividerLoc {
private static JPanel lazyPanel;
private static JSplitPane splitPane;
private static JButton openDialogButton;
private static JDialog dialog;
private static JFrame frame;
private static volatile Point point;
private static volatile Rectangle size;
private static volatile int setLoc;
private static volatile int curLoc;
private static boolean setLookAndFeel(UIManager.LookAndFeelInfo laf) {
try {
UIManager.setLookAndFeel(laf.getClassName());
return true;
} catch (UnsupportedLookAndFeelException ignored) {
System.out.println("Unsupported LAF: " + laf.getClassName());
return false;
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) throws Exception {
for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {
System.out.println("Testing LAF : " + laf.getClassName());
try {
if (!setLookAndFeel(laf)) {
continue;
}
SwingUtilities.invokeAndWait(TestSplitPaneResetDividerLoc::createAndShowUI);
Robot robot = new Robot();
robot.waitForIdle();
robot.delay(1000);
SwingUtilities.invokeAndWait(() -> {
point = openDialogButton.getLocationOnScreen();
size = openDialogButton.getBounds();
});
robot.mouseMove(point.x + size.width / 2, point.y + size.height / 2);
robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
robot.waitForIdle();
robot.delay(1000);
SwingUtilities.invokeAndWait(() -> {
int divLoc = splitPane.getDividerLocation();
splitPane.setDividerLocation(divLoc + 200);
});
robot.waitForIdle();
robot.delay(1000);
robot.keyPress(KeyEvent.VK_ESCAPE);
robot.keyRelease(KeyEvent.VK_ESCAPE);
SwingUtilities.invokeAndWait(() -> {
setLoc = splitPane.getDividerLocation();
System.out.println(setLoc);
});
robot.waitForIdle();
robot.delay(1000);
robot.mouseMove(point.x + size.width / 2, point.y + size.height / 2);
robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
robot.waitForIdle();
robot.delay(1000);
SwingUtilities.invokeAndWait(() -> {
curLoc = splitPane.getDividerLocation();
System.out.println(curLoc);
});
robot.keyPress(KeyEvent.VK_ESCAPE);
robot.keyRelease(KeyEvent.VK_ESCAPE);
if (curLoc != setLoc) {
throw new RuntimeException("Divider location is not preserved");
}
} finally {
SwingUtilities.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
lazyPanel = null;
});
}
}
}
private static void createAndShowUI() {
frame = new JFrame("JSplitPane Divider Location");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
openDialogButton = new JButton(new AbstractAction("Open Dialog") {
public void actionPerformed(ActionEvent e) {
openDialogFromOptionPane(frame);
}
});
frame.getContentPane().add(openDialogButton, BorderLayout.CENTER);
frame.setSize(400, 100);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void openDialogFromOptionPane(JFrame parent) {
if (lazyPanel == null) {
System.out.println("Creating lazy panel...");
lazyPanel = new JPanel(new BorderLayout());
JPanel left = new JPanel();
left.setBackground(Color.ORANGE);
JPanel right = new JPanel();
right.setBackground(Color.LIGHT_GRAY);
splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, left, right);
splitPane.setPreferredSize(new Dimension(400, 200));
// Set initial divider location — not preserved across dialog openings in OpenJDK 24
splitPane.setDividerLocation(120);
lazyPanel.add(splitPane, BorderLayout.CENTER);
}
JOptionPane optionPane = new JOptionPane(lazyPanel, JOptionPane.PLAIN_MESSAGE, JOptionPane.DEFAULT_OPTION);
dialog = optionPane.createDialog(parent, "SplitPane Dialog (JOptionPane)");
dialog.setModal(false);
dialog.setVisible(true);
}
}
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