/*******************************************************************************
* Copyright (c) 2005, 2014 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Simon Scholz <simon.scholz@vogella.com> - Bug 444829
*******************************************************************************/
package org.eclipse.jface.databinding.conformance.util;
import java.util.List;
import org.eclipse.core.databinding.observable.IObservablesListener;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.IValueChangeListener;
import org.eclipse.core.databinding.observable.value.ValueChangeEvent;
/**
* Listener for tracking the firing of ValueChangeEvents.
*/
public class ValueChangeEventTracker implements IValueChangeListener {
public int count;
public ValueChangeEvent event;
public final List<IObservablesListener> queue;
public ValueChangeEventTracker() {
this(null);
}
public ValueChangeEventTracker(List<IObservablesListener> queue) {
this.queue = queue;
}
@Override
public void handleValueChange(ValueChangeEvent event) {
count++;
this.event = event;
if (queue != null) {
queue.add(this);
}
}
/**
* Convenience method to register a new listener.
*
* @param observable
* @return tracker
*/
public static ValueChangeEventTracker observe(IObservableValue observable) {
ValueChangeEventTracker tracker = new ValueChangeEventTracker();
observable.addValueChangeListener(tracker);
return tracker;
}
}