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/* EmbeddingModelSupport.java
* =========================================================================
* This file is part of the GrInvIn project - http://www.grinvin.org
*
* Copyright (C) 2005-2008 Universiteit Gent
*
* 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; either version 2 of the License, or (at
* your option) any later version.
*
* 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.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.grinvin.graphs;
import javax.swing.event.EventListenerList;
/**
* Helper class for implementations of {@link EmbeddingModel}.
* Models can delegate listener management and notification to
* an object of this class.
*/
public class EmbeddingModelSupport {
//
private EventListenerList listenerList = new EventListenerList ();
// [kc] for performance reasons
private static final Class<EmbeddingListener>
EMBEDDING_LISTENER_CLASS = EmbeddingListener.class;
// implements EmbeddingModel
public void addEmbeddingListener (EmbeddingListener l) {
listenerList.add (EMBEDDING_LISTENER_CLASS, l);
}
// implements EmbeddingModel
public void removeEmbeddingListener (EmbeddingListener l) {
listenerList.remove (EMBEDDING_LISTENER_CLASS, l);
}
/**
* Notify all listeners of the fact that coordinates of a vertex
* were changed.
*/
public void fireCoordinatesChanged (Vertex vertex) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==EMBEDDING_LISTENER_CLASS)
((EmbeddingListener)listeners[i+1]).vertexCoordinatesChanged(vertex);
}
/**
* Notify all listeners of the fact that the dimension of the embedding
* was changed.
*/
public void fireDimensionChanged (int oldDimension) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==EMBEDDING_LISTENER_CLASS)
((EmbeddingListener)listeners[i+1]).dimensionChanged(oldDimension);
}
/**
* Notify all listeners of a bulk change to this embedding.
*/
public void fireEmbeddingChanged () {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==EMBEDDING_LISTENER_CLASS)
((EmbeddingListener)listeners[i+1]).embeddingChanged ();
}
}
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