org.openide.util

Class ChangeSupport

java.lang.Object

org.openide.util.ChangeSupport

public final class ChangeSupport
extends Object

A simple equivalent of PropertyChangeSupport for ChangeListeners. This class is not serializable.

Since:

7.8

Constructor Summary

Constructors

Constructor and Description
ChangeSupport(Object source) Creates a new ChangeSupport

Method Summary

Modifier and Type	Method and Description
void	addChangeListener(ChangeListener listener) Adds a ChangeListener to the listener list.
void	fireChange() Fires a change event to all registered listeners.
boolean	hasListeners() Checks if there are any listeners registered to thisChangeSupport.
void	removeChangeListener(ChangeListener listener) Removes a ChangeListener from the listener list.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChangeSupport

public ChangeSupport(Object source)

Creates a new ChangeSupport

Parameters:

source - the instance to be given as the source for events.

Method Detail

addChangeListener

public void addChangeListener(ChangeListener listener)

Adds a ChangeListener to the listener list. The same listener object may be added more than once, and will be called as many times as it is added. If listener is null, no exception is thrown and no action is taken.

Parameters:

listener - the ChangeListener to be added.

removeChangeListener

public void removeChangeListener(ChangeListener listener)

Removes a ChangeListener from the listener list. If listener was added more than once, it will be notified one less time after being removed. If listener is null, or was never added, no exception is thrown and no action is taken.

Parameters:

listener - the ChangeListener to be removed.

fireChange

public void fireChange()

Fires a change event to all registered listeners.

hasListeners

public boolean hasListeners()

Checks if there are any listeners registered to thisChangeSupport.

Returns:

true if there are one or more listeners for the given property, false otherwise.