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

# IFPObserver

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Interface for an object to observe other objects.

## Declaration

Source position: classesh.inc line 178

`type IFPObserver = interface`
`procedure FPOObservedChanged();` |  | Entry point for change notifications
`end;`

## Inheritance

`IFPObserver` |  | Interface for an object to observe other objects.

## Description

IFPObserver is the interface an object must implement if it wishes to receive change notifications from another object. The presence of this interface will be checked when the object registers itself using IFPObserver.FPOAttachObserver. The change notifications arrive because the FPOObservedChanged method is called by the observed object.

## See also

IFPObserved |  | Interface implemented by an object that can be observed.
FPOAttachObserver |  | Attach a new observer to the object

Documentation generated on: Feb 26 2014