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/*
* Copyright (c) 2003, 2023, 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 4924516
@summary Verifies that SHOWING_CHANGED event is propagated to \
HierarchyListeners then toolkit enabled
@key headful
*/
import java.awt.AWTEvent;
import java.awt.EventQueue;
import java.awt.Toolkit;
import java.awt.event.AWTEventListener;
import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class ShowingChangedEventTest
implements AWTEventListener, HierarchyListener{
private boolean eventRegisteredOnButton = false;
private final JFrame frame = new JFrame("ShowingChangedEventTest");
private final JPanel panel = new JPanel();
private final JButton button = new JButton();
public static void main(String[] args) throws Exception {
EventQueue.invokeAndWait(() -> {
ShowingChangedEventTest showingChangedEventTest
= new ShowingChangedEventTest();
try {
showingChangedEventTest.start();
} finally {
showingChangedEventTest.frame.dispose();
}
});
}
public void start () {
frame.getContentPane().add(panel);
panel.add(button);
frame.pack();
frame.setVisible(true);
Toolkit.getDefaultToolkit()
.addAWTEventListener(this, AWTEvent.HIERARCHY_EVENT_MASK);
button.addHierarchyListener(this);
panel.setVisible(false);
if (!eventRegisteredOnButton){
throw new RuntimeException("Event wasn't registered on Button.");
}
}
@Override
public void eventDispatched(AWTEvent awtevt) {
if (awtevt instanceof HierarchyEvent) {
HierarchyEvent hevt = (HierarchyEvent) awtevt;
if (hevt != null && (hevt.getChangeFlags()
& HierarchyEvent.SHOWING_CHANGED) != 0) {
System.out.println("Hierarchy event was received on Toolkit. "
+ "SHOWING_CHANGED for "
+ hevt.getChanged().getClass().getName());
}
}
}
@Override
public void hierarchyChanged(HierarchyEvent e) {
if ((HierarchyEvent.SHOWING_CHANGED & e.getChangeFlags()) != 0) {
System.out.println("Hierarchy event was received on Button. "
+ "SHOWING_CHANGED for "
+ e.getChanged().getClass().getName());
}
eventRegisteredOnButton = true;
}
}
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