/**
* Created on Dec 30, 2010
*
* Copyright 2010 Vuze, Inc. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License only.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.gudy.azureus2.ui.swt;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.gudy.azureus2.core3.util.AERunnable;
/**
* Delayed {@link Listener} that denies more triggers while one is pending
*
* @author TuxPaper
* @created Dec 30, 2010
*
*/
public abstract class DelayedListenerMultiCombiner
implements Listener
{
Object lock = new Object();
private boolean pending = false;
public final void handleEvent(final Event event) {
synchronized (lock) {
if (pending) {
return;
}
pending = true;
}
Utils.execSWTThreadLater(0, new AERunnable() {
public void runSupport() {
try {
handleDelayedEvent(event);
} finally {
synchronized (lock) {
pending = false;
}
}
}
});
}
public abstract void handleDelayedEvent(Event firstEvent);
}