public interface DrawingObservable
Modifier and Type | Method and Description |
---|---|
void |
addDrawingObserver(Observer observer)
Adds a new
Observer . |
void |
deleteDrawingObserver(Observer observer)
Deletes a registered drawing
Observer from the list of registered
ones. |
void |
deleteDrawingObservers()
Deletes all the registered drawing
Observer objects. |
void addDrawingObserver(Observer observer)
Observer
.observer
- the Observer
to addvoid deleteDrawingObserver(Observer observer)
Observer
from the list of registered
ones.observer
- to delete from the registered onesvoid deleteDrawingObservers()
Observer
objects.