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/*
* Copyright (c) 2010, 2016, 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 6424157
@author Artem Ananiev: area=eventqueue
@run main PreserveDispatchThread
*/
import java.awt.*;
import java.awt.event.*;
public class PreserveDispatchThread {
private static volatile Frame f;
private static volatile Dialog d;
private static volatile boolean isEDT = true;
public static void main(String[] args) throws Exception {
f = new Frame("F");
f.setSize(320, 340);
f.setLocationRelativeTo(null);
f.setVisible(true);
try {
test1();
if (!isEDT) {
throw new RuntimeException("Test FAILED (test1): event dispatch thread is changed");
}
test2();
if (!isEDT) {
throw new RuntimeException("Test FAILED (test2): event dispatch thread is changed");
}
test3();
if (!isEDT) {
throw new RuntimeException("Test FAILED (test3): event dispatch thread is changed");
}
} finally {
if (d != null) {
d.dispose();
}
f.dispose();
}
}
/*
* Tests that push/pop doesn't change the dispatch thread if
* called on EDT.
*/
private static void test1() throws Exception {
EventQueue.invokeAndWait(new Runnable() {
@Override
public void run() {
TestEventQueue teq = new TestEventQueue();
EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
try {
seq.push(teq);
d = new TestDialog();
d.setVisible(true);
checkEDT();
} finally {
teq.pop();
}
checkEDT();
}
});
}
/*
* Tests that push/pop doesn't change the dispatch thread if
* called on the main thread.
*/
private static void test2() throws Exception {
TestEventQueue teq = new TestEventQueue();
EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
try {
seq.push(teq);
EventQueue.invokeAndWait(new Runnable() {
@Override
public void run() {
checkEDT();
d = new TestDialog();
d.setVisible(true);
checkEDT();
}
});
} finally {
teq.pop();
}
}
private static final Object test3Lock = new Object();
private static boolean test3Sync = false;
/*
* A complex test: several nested invokeLater() are called and
* in every runnable a check for EDT is performed. At the ent
* of the test we wait for all the runnables to be processed
* and the dialog is disposed; otherwise the last EDT check can
* be later than this method returns and the whole test is passed.
*/
private static void test3() throws Exception {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
d = new Dialog(f, true);
d.setSize(240, 180);
d.setLocationRelativeTo(f);
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
d.setVisible(true);
checkEDT();
}
});
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TestEventQueue teq = new TestEventQueue();
EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
try {
seq.push(teq);
checkEDT();
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
d.dispose();
checkEDT();
synchronized (test3Lock) {
test3Sync = true;
test3Lock.notify();
}
}
});
} finally {
teq.pop();
}
checkEDT();
}
});
checkEDT();
}
});
synchronized (test3Lock) {
while (!test3Sync) {
try {
test3Lock.wait();
} catch (InterruptedException ie) {
break;
}
}
}
// Make sure all the nested invokeLater/invokeAndWait are processed
EventQueue.invokeAndWait(new Runnable() {
@Override
public void run() {
}
});
}
private static void checkEDT() {
isEDT = isEDT && EventQueue.isDispatchThread();
}
private static class TestEventQueue extends EventQueue {
public TestEventQueue() {
super();
}
public void pop() {
super.pop();
}
}
private static class TestDialog extends Dialog {
private volatile boolean dialogShown = false;
private volatile boolean paintCalled = false;
public TestDialog() {
super(f, true);
setSize(240, 180);
setLocationRelativeTo(f);
addComponentListener(new ComponentAdapter() {
@Override
public void componentShown(ComponentEvent e) {
if (paintCalled) {
dispose();
}
dialogShown = true;
}
});
}
@Override
public void paint(Graphics g) {
if (dialogShown) {
dispose();
}
paintCalled = true;
}
}
}
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