Java example source code file (InvalidateMustRespectValidateRoots.java)

This example Java source code file (InvalidateMustRespectValidateRoots.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, event, gui, invalidatemustrespectvalidateroots, jbutton, jframe, jrootpane, runnable, runtimeexception, swing

The InvalidateMustRespectValidateRoots.java Java example source code

/*
 * Copyright (c) 2009, 2011, 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 6852592
  @summary invalidate() must stop when it encounters a validate root
  @author anthony.petrov@sun.com
  @run main/othervm -Djava.awt.smartInvalidate=true InvalidateMustRespectValidateRoots
*/

import javax.swing.*;
import java.awt.event.*;

public class InvalidateMustRespectValidateRoots {
    private static volatile JRootPane rootPane;

    public static void main(String args[]) throws Exception {
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                // The JRootPane is a validate root. We'll check if
                // invalidate() stops on the root pane, or goes further
                // up to the frame.
                JFrame frame = new JFrame();
                final JButton button = new JButton();

                frame.add(button);

                // To enable running the test manually: use the Ctrl-Shift-F1
                // to print the component hierarchy to the console
                button.addActionListener(new ActionListener() {
                    public void actionPerformed(ActionEvent ev) {
                        if (button.isValid()) {
                            button.invalidate();
                        } else {
                            button.revalidate();
                        }
                    }
                });

                rootPane = frame.getRootPane();

                // Now the component hierarchy looks like:
                // frame
                // --> rootPane
                //     --> layered pane
                //         --> content pane
                //             --> button

                // Make all components valid first via showing the frame
                // We have to make the frame visible. Otherwise revalidate() is
                // useless (see RepaintManager.addInvalidComponent()).
                frame.pack(); // To enable running this test manually
                frame.setVisible(true);

                if (!frame.isValid()) {
                    throw new RuntimeException(
                            "setVisible(true) failed to validate the frame");
                }

                // Now invalidate the button
                button.invalidate();

                // Check if the 'valid' status is what we expect it to be
                if (rootPane.isValid()) {
                    throw new RuntimeException(
                            "invalidate() failed to invalidate the root pane");
                }

                if (!frame.isValid()) {
                    throw new RuntimeException(
                            "invalidate() invalidated the frame");
                }

                // Now validate the hierarchy again
                button.revalidate();

                // Now let the validation happen on the EDT
            }
        });

        Thread.sleep(1000);

        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                // Check if the root pane finally became valid
                if (!rootPane.isValid()) {
                    throw new RuntimeException(
                            "revalidate() failed to validate the hierarchy");
                }
            }
        });
    }
}