IFPObserved interface
Interface implemented by an object that can be observed.
Declaration
IFPObserved = classDescription
IFPObserved is an interface which can be implemented in objects that must be observable.
Objects that wish to observe the object can register themselves with the
FPOAttachObserver call, and must be detached using the
FPODetachObserver call.
This interface is not reference counted, so care must be taken that the
ooFree message is sent with FPONotifyObservers
when the object is freed.
See also
Methods
FPOAttachObserver | Attach a new observer to the object. | |
FPODetachObserver | Remove an observer from the list of observers. | |
FPONotifyObservers | Notify all observers. |
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.