diva.graph
Class AbstractGraphModel

java.lang.Object
  diva.graph.AbstractGraphModel

All Implemented Interfaces:

GraphModel

Direct Known Subclasses:

ModularGraphModel

public abstract class AbstractGraphModel
extends java.lang.Object
implements GraphModel

An abstract implementation of the GraphModel interface that provides the basic event notification system

Version:

$Id: AbstractGraphModel.java,v 1.20 2005/10/24 19:09:04 cxh Exp $

Author:

Steve Neuendorffer

Accepted Rating:

Red

Field Summary

protected GraphEventMulticaster

_graphListeners The list of graph listeners.

Constructor Summary

AbstractGraphModel()

Method Summary

void	addGraphListener(GraphListener l) Add a graph listener to the model.
void	dispatchGraphEvent(GraphEvent e) Send an graph event to all of the graph listeners.
void	removeGraphListener(GraphListener l) Remove the given listener from this graph model.
void	setDispatchEnabled(boolean val) Turn on/off all event dispatches from this graph model, for use in an inner-loop algorithm.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface diva.graph.GraphModel

containsNode, getHead, getNodeCount, getParent, getProperty, getRoot, getSemanticObject, getTail, inEdges, isComposite, isDirected, isEdge, isNode, nodes, nodesAfterEdges, nodesBeforeEdges, outEdges, setProperty, setSemanticObject

Field Detail

_graphListeners

protected GraphEventMulticaster _graphListeners

The list of graph listeners.

Constructor Detail

AbstractGraphModel

public AbstractGraphModel()

Method Detail

addGraphListener

public void addGraphListener(GraphListener l)

Add a graph listener to the model. Graph listeners are notified with a GraphEvent any time the graph is modified.

Specified by:

addGraphListener in interface GraphModel

dispatchGraphEvent

public void dispatchGraphEvent(GraphEvent e)

Send an graph event to all of the graph listeners. This allows manual control of sending graph graph events, or allows the user to send a STRUCTURE_CHANGED after some inner-loop operations.

This method furthermore ensures that all graph events are dispatched in the event thread.

Specified by:

dispatchGraphEvent in interface GraphModel

See Also:

setDispatchEnabled(boolean)

removeGraphListener

public void removeGraphListener(GraphListener l)

Remove the given listener from this graph model. The listener will no longer be notified of changes to the graph.

Specified by:

removeGraphListener in interface GraphModel

setDispatchEnabled

public void setDispatchEnabled(boolean val)

Turn on/off all event dispatches from this graph model, for use in an inner-loop algorithm. When turning dispatch back on again, if the client has made changes that listeners should know about, he should create an appropriate STRUCTURE_CHANGED and dispatch it using the dispatchGraphEvent() method.

Specified by:

setDispatchEnabled in interface GraphModel

See Also:

dispatchGraphEvent(GraphEvent)