/*
* Copyright (c) 2012, grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.jowidgets.spi.impl.bridge.swt.awt.common.awt;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Set;
import javax.swing.JPanel;
import org.jowidgets.util.Assert;
class PeerObservablePanel extends JPanel {
private static final long serialVersionUID = 8389471995812491758L;
private final Set<IPeerListener> peerListeners;
PeerObservablePanel() {
this.peerListeners = new LinkedHashSet<IPeerListener>();
}
@Override
public void addNotify() {
super.addNotify();
fireAfterPeerAdd();
}
@Override
public void removeNotify() {
fireBeforePeerRemove();
super.removeNotify();
}
void addPeerListener(final IPeerListener listener) {
Assert.paramNotNull(listener, "listener");
peerListeners.add(listener);
}
void removePeerListener(final IPeerListener listener) {
Assert.paramNotNull(listener, "listener");
peerListeners.remove(listener);
}
private void fireAfterPeerAdd() {
for (final IPeerListener peerListener : new LinkedList<IPeerListener>(peerListeners)) {
peerListener.afterPeerAdd();
}
}
private void fireBeforePeerRemove() {
for (final IPeerListener peerListener : new LinkedList<IPeerListener>(peerListeners)) {
peerListener.beforePeerRemove();
}
}
interface IPeerListener {
void afterPeerAdd();
void beforePeerRemove();
}
}