tlp_Observer(3tulip)

Usage

#include <Observable.h>

Public Member Functions

virtual ~Observer ()
virtual void update (std::set< Observable * >::iterator begin, std::set< Observable * >::iterator end)=0
virtual void observableDestroyed (Observable *)=0

Detailed Description

The Observer pattern is a framework for handling state dependency between observer and observed object. It is described in the lecture notes and pp293-304 of Design Patterns by Gamma, Helm, Johnson, and Vlissides.

Constructor & Destructor Documentation

virtual tlp::Observer::~Observer () [inline, virtual]

Member Function Documentation

virtual void tlp::Observer::observableDestroyed (Observable *) [pure virtual] Methods called when an observable has been deleted. holdObservers and unHoldObservers function have no effects on this function.

virtual void tlp::Observer::update (std::set< Observable * >::iterator begin, std::set< Observable * >::iterator end) [pure virtual] Methods called when a change occur in the observed objects Due to the possibility to differs notificatiosn several objects can send a notify events simultaneously. The iterators given in parameter enable to iterate all these objects.