de.dante.extex.interpreter.context.observer.group
Interface GroupObservable

All Known Implementing Classes:

ContextImpl

public interface GroupObservable

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

Version:

$Revision: 1.2 $

Author:

Gerd Neugebauer

registerGroupObserver

public 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

public 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