| # PFObserver.h
Version: | 3.1.3
Includes: | <Cocoa/Cocoa.h> <PFAssistive/PFUIElement.h>
## Introduction PFObserver.h supports observing changes to UI elements in running applications in real time as changes occur. ##### Discussion The accessibility API implements the concept of an "observer," an object based on Core Foundation's CFTypeRef class that registers to observe a user interface element on the screen in a running application and issues accessibility notifications when changes occur. PFObserver.h implements this same concept in its PFObserver class. ## Classes `PFObserver` A concrete class representing an observer that may be registered to observe changes to UI elements in a running application. ## Protocols `PFObserverDelegate` A formal protocol declaring delegate messages sent by PFObserver. © 2003-2011 Bill Cheeseman. Used by permission. All rights reserved. Last Updated: Sunday, October 16, 2011