org.jdrawing
Class AbstractDrawingModel

java.lang.Object
  org.jdrawing.AbstractDrawingModel

All Implemented Interfaces:

DrawingModel

Direct Known Subclasses:

DefaultDrawingModel, GraphicsModel, LayeredDrawingModel

public abstract class AbstractDrawingModel

extends java.lang.Object

implements DrawingModel

This abstract class provides default implementations for most of the methods in the DrawingModel interface. It takes care of the management of listeners and provides some conveniences for generating DrawingModelEvents and dispatching them to the listeners

Constructor Summary

AbstractDrawingModel()

Method Summary

void	addDrawingModelListener(DrawingModelListener listener) Adds a listener which will be notified about changes in this model.
protected void	fireElementsAdded(java.lang.Object[] elements) Notifies all listeners that elements have been inserted.
protected void	fireElementsChanged(java.lang.Object[] elements) Notifies all listeners that elements have been changed.
protected void	fireElementsRemoved(java.lang.Object[] elements) Notifies all listeners that elements have been removed.
protected void	fireModelChanged() Notifies all listeners that the model has changed.
DrawingModelListener[]	getDrawingModelListeners() Returns an array of all the drawing model listeners registered on this model.
void	removeDrawingModelListener(DrawingModelListener listener) Removes a listener from the list that is notified about changes in this model.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jdrawing.DrawingModel

elements, sortElements

Constructor Detail

AbstractDrawingModel

public AbstractDrawingModel()

Method Detail

addDrawingModelListener

public void addDrawingModelListener(DrawingModelListener listener)

Description copied from interface: DrawingModel

Adds a listener which will be notified about changes in this model.

Specified by:

addDrawingModelListener in interface DrawingModel

Parameters:

listener - the DrawingModelListener

removeDrawingModelListener

public void removeDrawingModelListener(DrawingModelListener listener)

Description copied from interface: DrawingModel

Removes a listener from the list that is notified about changes in this model. If the listener is not in list or is null, this method does nothing.

Specified by:

removeDrawingModelListener in interface DrawingModel

Parameters:

listener - the DrawingModelListener

getDrawingModelListeners

public DrawingModelListener[] getDrawingModelListeners()

Returns an array of all the drawing model listeners registered on this model.

Returns:

all of this model's DrawingModelListeners or an empty array if no drawing model listeners are currently registered

fireElementsAdded

protected void fireElementsAdded(java.lang.Object[] elements)

Notifies all listeners that elements have been inserted.

Parameters:

elements - an array of Object containing inserted elements

Throws:

java.lang.IllegalArgumentException - if elements is null

fireElementsRemoved

protected void fireElementsRemoved(java.lang.Object[] elements)

Notifies all listeners that elements have been removed.

Parameters:

elements - an array of Object containing removed elements

Throws:

java.lang.IllegalArgumentException - if elements is null

fireElementsChanged

protected void fireElementsChanged(java.lang.Object[] elements)

Notifies all listeners that elements have been changed.

Parameters:

elements - an array of Object containing changed elements

Throws:

java.lang.IllegalArgumentException - if elements is null

fireModelChanged

protected void fireModelChanged()

Notifies all listeners that the model has changed.