[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Classes' (#rtl)


Operation which is reported to an observer


Source position: classesh.inc line 160

type TFPObservedOperation = (



The observed object has changed.



The observed object is being freed.



An item is added to the observed object (generally a list).



An item is deleted from the observed object (generally a list).



Custom event.



TFPObservedOperation enumerates the possible operations that can be reported to an observer. Which of these operations is reported depends on the implementation of the observed object.

See also



Interface implemented by an object that can be observed.



Interface for an object to observe other objects.

Documentation generated on: Jun 22 2020