ucar.unidata.util
Class ListenerManager

java.lang.Object
  ucar.unidata.util.ListenerManager

public class ListenerManager
extends Object

Helper class for event listeners.

Version:

$Id: ListenerManager.java,v 1.16 2006/05/05 19:19:35 jeffmc Exp $

Author:

John Caron

Constructor Summary

ListenerManager(String listener_class, String event_class, String method_name)
Constructor.

Method Summary

void	addListener(Object l) Add a listener.
boolean	hasListeners() _more_
void	removeListener(Object l) Remove a listener.
void	sendEvent(EventObject event) Send an event to all registered listeners.
void	sendEventExcludeSource(EventObject event) Send an event to all registered listeners, except the named one.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListenerManager

public ListenerManager(String listener_class,
                       String event_class,
                       String method_name)

Constructor.

Parameters:

listener_class - the name of the EventListener class, eg "ucar.unidata.ui.UIChangeListener"

event_class - the name of the Event class, eg "ucar.unidata.ui.UIChangeEvent"

method_name - the name of the EventListener method, eg "processChange".

    This method must have the signature     public void method_name( event_class e) 

Method Detail

addListener

public void addListener(Object l)

Add a listener.

Parameters:

l - listener: must be of type "listener_class"

removeListener

public void removeListener(Object l)

Remove a listener.

Parameters:

l -

hasListeners

public boolean hasListeners()

_more_

Returns:

_more_

sendEvent

public void sendEvent(EventObject event)

Send an event to all registered listeners. If an exception is thrown, remove the Listener from the list

Parameters:

event - the event to be sent: public void method_name( event_class event)

sendEventExcludeSource

public void sendEventExcludeSource(EventObject event)

Send an event to all registered listeners, except the named one.

Parameters:

event - the event to be sent: public void method_name( event_class event)