/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
Gephi 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Gephi. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.ui.components.SplineEditor.equation;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.LinkedList;
import java.util.List;
public abstract class AbstractEquation implements Equation {
protected List<PropertyChangeListener> listeners;
protected AbstractEquation() {
this.listeners = new LinkedList<PropertyChangeListener>();
}
public void addPropertyChangeListener(PropertyChangeListener listener) {
if (listener != null && !listeners.contains(listener)) {
listeners.add(listener);
}
}
public void removePropertyChangeListener(PropertyChangeListener listener) {
if (listener != null) {
listeners.remove(listener);
}
}
protected void firePropertyChange(String propertyName,
double oldValue,
double newValue) {
PropertyChangeEvent changeEvent = new PropertyChangeEvent(this,
propertyName,
oldValue,
newValue);
for (PropertyChangeListener listener : listeners) {
listener.propertyChange(changeEvent);
}
}
}