kcl.waterloo.observable

Interface GJObservableInterface

All Superinterfaces:

java.util.EventListener, java.beans.PropertyChangeListener

All Known Subinterfaces:

GJDataVectorInterface<T>, GJGraphInterface, GJPlotInterface

All Known Implementing Classes:

GJAbstractDataVector, GJAbstractGraph, GJAbstractGraph0, GJAbstractGraph1, GJAbstractGraphContainer, GJAbstractObservable, GJAbstractPlot, GJAbstractPlotModelImpl, GJAbstractPolarPlot, GJBar, GJBigDecimalDataVector, GJBox, GJCloud, GJComponentPlot, GJContour, GJDataModel, GJDoubleDataVector, GJErrorBar, GJFastLine, GJFeather, GJFloatDataVector, GJGraph, GJGraphContainer, GJLine, GJPathPlot, GJPie, GJPolarBar, GJPolarLine, GJPolarScatter, GJPolarStem, GJPrimitiveDoubleDataVector, GJQuiver, GJScatter, GJStairs, GJStem

public interface GJObservableInterface
extends java.beans.PropertyChangeListener

GJObservableInterface: Components can implement the interface directly or extend the GJAbstractObservable class.

Listeners can be added using the addPropertyChangeListener methods and are registered in a PropertyChangeSupport instance stored as a property of the GJAbstractObservable superclass instance.

A list of linked objects is maintained in an internal ArrayList. Objects in the list can be modified in propertyChange methods of classes that implement the interface.

Method Summary

Modifier and Type	Method and Description
void	addPropertyChangeListener(java.beans.PropertyChangeListener listener) Adds a property change listener.
void	addPropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener) See java.beans.PropertyChangeSupport
void	firePropertyChange(java.beans.PropertyChangeEvent pce)
java.beans.PropertyChangeListener[]	getPropertyChangeListeners() See java.beans.PropertyChangeSupport
java.beans.PropertyChangeListener[]	getPropertyChangeListeners(java.lang.String propertyName) See java.beans.PropertyChangeSupport
boolean	hasListeners(java.lang.String propertyName) Returns true if this instance has installed listeners.
boolean	hasSelfListener() Returns true if the implementing instance is a listener.
void	removePropertyChangeListener(java.beans.PropertyChangeListener listener) See java.beans.PropertyChangeSupport
void	removePropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener) See java.beans.PropertyChangeSupport

Methods inherited from interface java.beans.PropertyChangeListener

propertyChange

Method Detail

addPropertyChangeListener

void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

Adds a property change listener. Note that addPropertyChangeListener might be called from a super-constructor with some L&Fs so addPropertyChangeListener should test for null PropertyChangeSupport and initialize it if needed.

Parameters:

listener - - the object that listens.

addPropertyChangeListener

void addPropertyChangeListener(java.lang.String propertyName,
                               java.beans.PropertyChangeListener listener)

See java.beans.PropertyChangeSupport

Parameters:

propertyName -

listener -

getPropertyChangeListeners

java.beans.PropertyChangeListener[] getPropertyChangeListeners()

See java.beans.PropertyChangeSupport

Returns:

a PropertyChangeListener[]

getPropertyChangeListeners

java.beans.PropertyChangeListener[] getPropertyChangeListeners(java.lang.String propertyName)

See java.beans.PropertyChangeSupport

Parameters:

propertyName -

Returns:

a PropertyChangeListener[]

removePropertyChangeListener

void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

See java.beans.PropertyChangeSupport

Parameters:

listener -

removePropertyChangeListener

void removePropertyChangeListener(java.lang.String propertyName,
                                  java.beans.PropertyChangeListener listener)

See java.beans.PropertyChangeSupport

Parameters:

propertyName -

listener -

hasListeners

boolean hasListeners(java.lang.String propertyName)

Returns true if this instance has installed listeners. See java.beans.PropertyChangeSupport

Parameters:

propertyName -

Returns:

the flag

hasSelfListener

boolean hasSelfListener()

Returns true if the implementing instance is a listener.

Returns:

true/false

firePropertyChange

void firePropertyChange(java.beans.PropertyChangeEvent pce)