Observer Class Reference

#include <lomse_events.h>

Detailed Description

Auxiliary object responsible for keeping information about an Observable object being observed, the events to listen to and the methods that must invoke to dispatch each event. It is also responsible for doing this dispatch when requested.

Public Member Functions
virtual	~Observer ()
Observable *	target ()
void	notify (SpEventInfo pEvent)
void	remove_handler (int evtType)
int	get_observable_type ()
void	add_handler (int eventType, void(*pt2Func)(SpEventInfo event))
void	add_handler (int eventType, void *pThis, void(*pt2Func)(void *pObj, SpEventInfo event))
void	add_handler (int eventType, EventHandler *pHandler)
void	add_handler (int eventType, int childType, ImoId childId, EventHandler *pHandler)

Friends
class	EventNotifier

Constructor & Destructor Documentation

~Observer()

virtual Observer::~Observer ( )

virtual

Destructor.

Member Function Documentation

add_handler() [1/4]

void Observer::add_handler	(	int	eventType,
		void(*)(SpEventInfo event)	pt2Func
	)

Register to receive notifications from this Observer.

add_handler() [2/4]

void Observer::add_handler	(	int	eventType,
		void *	pThis,
		void(*)(void *pObj, SpEventInfo event)	pt2Func
	)

Register to receive notifications from this Observer.

add_handler() [3/4]

void Observer::add_handler	(	int	eventType,
		EventHandler *	pHandler
	)

Register to receive notifications from this Observer.

add_handler() [4/4]

void Observer::add_handler	(	int	eventType,
		int	childType,
		ImoId	childId,
		EventHandler *	pHandler
	)

Register to receive notifications from this Observer.

get_observable_type()

int Observer::get_observable_type ( )

inline

Returns the type of the observed event generator object.

notify()

void Observer::notify

(

SpEventInfo

pEvent

)

Notify the event pEvent to all registered objects observing events of the same type than pEvent type.

remove_handler()

void Observer::remove_handler

(

int

evtType

)

Remove a registered handler so that in future it will not be notified of new events.

target()

Observable* Observer::target

(

)

Returns the event generator object that is being observed by this Observer.