java.lang.Object

edu.uci.ics.jung.visualization.util.DefaultChangeEventSupport

All Implemented Interfaces:: ChangeEventSupport

public class DefaultChangeEventSupport extends Object implements ChangeEventSupport

Basic implementation of ChangeEventSupport, using standard jdk classes

Author:: Tom Nelson - tomnelson@dev.java.net

Field Summary

Fields

Modifier and Type

Field

Description

protected ChangeEvent

changeEvent

Only one ChangeEvent is needed instance since the event's only state is the source property.

protected EventListenerList

listenerList

holds the registered listeners
Constructor Summary

Constructors

Constructor

Description

DefaultChangeEventSupport(Object eventSource)
Method Summary

Modifier and Type

Method

Description

void

addChangeListener(ChangeListener l)

void

fireStateChanged()

Notifies all listeners that have registered interest for notification on this event type.

ChangeListener[]

getChangeListeners()

Returns an array of all the ChangeListeners added with addChangeListener().

void

removeChangeListener(ChangeListener l)

Removes a ChangeListener.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- listenerList
  
  protected EventListenerList listenerList
  
  holds the registered listeners
- changeEvent
  
  protected transient ChangeEvent changeEvent
  
  Only one ChangeEvent is needed instance since the event's only state is the source property. The source of events generated is always "this".
Constructor Details
- DefaultChangeEventSupport
  
  public DefaultChangeEventSupport(Object eventSource)
Method Details
- addChangeListener
  
  public void addChangeListener(ChangeListener l)
  
  Specified by:
  
  addChangeListener in interface ChangeEventSupport
- removeChangeListener
  
  public void removeChangeListener(ChangeListener l)
  
  Description copied from interface: ChangeEventSupport
  
  Removes a ChangeListener.
  
  Specified by:
  
  removeChangeListener in interface ChangeEventSupport
  
  Parameters:
  
  l - the listener to be removed
- getChangeListeners
  
  public ChangeListener[] getChangeListeners()
  
  Description copied from interface: ChangeEventSupport
  
  Returns an array of all the ChangeListeners added with addChangeListener().
  
  Specified by:
  
  getChangeListeners in interface ChangeEventSupport
  
  Returns:
  
  all of the ChangeListeners added or an empty array if no listeners have been added
- fireStateChanged
  
  public void fireStateChanged()
  
  Notifies all listeners that have registered interest for notification on this event type. The event instance is lazily created. The primary listeners will be views that need to be repainted because of changes in this model instance
  Specified by:
  
  fireStateChanged in interface ChangeEventSupport
  
  See Also:
  
  EventListenerList

Class DefaultChangeEventSupport

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Details

listenerList

changeEvent

Constructor Details

DefaultChangeEventSupport

Method Details

addChangeListener

removeChangeListener

getChangeListeners

fireStateChanged