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/* GraphModelSupport.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 GraphModel}.
* Models can delegate listener management and notification to
* an object of this class.
*/
public class GraphModelSupport {
//
private EventListenerList listenerList = new EventListenerList ();
// [kc] for performance reasons
private static final Class<GraphListener>
GRAPH_LISTENER_CLASS = GraphListener.class;
// implements GraphModel
public void addGraphListener (GraphListener l) {
listenerList.add (GRAPH_LISTENER_CLASS, l);
}
// implements GraphModel
public void removeGraphListener (GraphListener l) {
listenerList.remove (GRAPH_LISTENER_CLASS, l);
}
/**
* Notify all listeners of the fact that a vertex was added
* to this graph.
*/
protected void fireVertexAdded (Vertex vertex) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).vertexAdded (vertex);
}
/**
* Notify all listeners of the fact that an edge was added
* to this graph.
*/
protected void fireEdgeAdded (Edge edge) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).edgeAdded (edge);
}
/**
* Notify all listeners of the fact that a vertex was removed
* from this graph.
*/
protected void fireVertexRemoved (Vertex vertex) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).vertexRemoved (vertex);
}
/**
* Notify all listeners of the fact that a vertex was restored
* to this graph.
*/
protected void fireVertexRestored (Vertex vertex) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).vertexRestored (vertex);
}
/**
* Notify all listeners of the fact that an edge was removed
* from this graph.
*/
protected void fireEdgeRemoved (Edge edge) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).edgeRemoved (edge);
}
/**
* Notify all listeners of the fact that an edge was restored
* to this graph.
*/
protected void fireEdgeRestored (Edge edge) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).edgeRestored (edge);
}
/**
* Notify all listeners of the fact that vertex information
* was changed.
*/
protected void fireVertexChanged (Vertex vertex) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).vertexChanged (vertex);
}
/**
* Notify all listeners of the fact that edge information
* was changed.
*/
protected void fireEdgeChanged (Edge edge) {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).edgeChanged (edge);
}
/**
* Notify all listeners of a bulk change to this graph.
*/
protected void fireGraphChanged () {
Object[] listeners = listenerList.getListenerList ();
for (int i = listeners.length-2; i>=0; i-=2)
if (listeners[i]==GRAPH_LISTENER_CLASS)
((GraphListener)listeners[i+1]).graphChanged ();
}
}
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