org.extex.interpreter.context.observer.group
Interface GroupObservable

All Known Implementing Classes:

ContextExtensionImpl, ContextImpl

public interface GroupObservable

This interface describes the possibility to register an observer for an group event.

Version:

$Revision$

Author:

Gerd Neugebauer

Method Summary

void	registerGroupObserver(GroupObserver observer) Register an observer for group change events.
void	unregisterGroupObserver(GroupObserver observer) Remove a registered observer for group change events.

Method Detail

registerGroupObserver

void registerGroupObserver(GroupObserver observer)

Register an observer for group change events. Group change events are triggered when a group is opened or closed. In this case the appropriate method in the observer is invoked.

Parameters:

observer - the observer to receive the events

unregisterGroupObserver

void unregisterGroupObserver(GroupObserver observer)

Remove a registered observer for group change events. Group change events are triggered when a group is opened or closed. In this case the appropriate method in the observer is invoked.

Parameters:

observer - the observer to receive the events