Detailed Description

Inherit from this class to get notified about events from any CObservable object after subscribing to it.

The main methods in this class are:

observeBegin(): To be called to start listening at a given object.
OnEvent(): Virtual functions to be implemented in your child class to receive all the notifications.

Note that if custom (child) mrptEvent classes are used, you can tell between them in runtime with "dynamic_cast<>()".

Note: The pairs CObservable / CObserver automatically notify each other the destruction of any of them, effectively ending the subscription of events.

See also: CObservable, mrptEvent

Definition at line 34 of file CObserver.h.

#include <mrpt/system/CObserver.h>

Inheritance diagram for mrpt::system::CObserver:

Public Member Functions
	CObserver ()

virtual	~CObserver ()

void	observeBegin (CObservable &obj)
	Starts the subscription of this observer to the given object. More...

void	observeEnd (CObservable &obj)
	Ends the subscription of this observer to the given object (note that there is no need to call this method, since the destruction of the first of observer/observed will put an end to the process. More...

Protected Member Functions
virtual void	OnEvent (const mrptEvent &e)=0
	This virtual function will be called upon receive of any event after starting listening at any CObservable object. More...

Private Member Functions
void	internal_on_event (const mrptEvent &e)

Private Attributes
std::set< CObservable * >	m_subscribed

Friends
class	CObservable

Constructor & Destructor Documentation

◆ CObserver()

CObserver::CObserver ( )

default

◆ ~CObserver()

CObserver::~CObserver ( )

virtual

Definition at line 19 of file CObserver.cpp.

Member Function Documentation

◆ internal_on_event()

void CObserver::internal_on_event ( const mrptEvent & e )

private

Definition at line 47 of file CObserver.cpp.

◆ observeBegin()

void CObserver::observeBegin ( CObservable & obj )

Starts the subscription of this observer to the given object.

See also: observeEnd

Definition at line 26 of file CObserver.cpp.

References mrpt::system::CObservable::internal_observer_begin().

Referenced by CGraphSlamHandler< GRAPH_T >::initVisualization().

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◆ observeEnd()

void CObserver::observeEnd ( CObservable & obj )

Ends the subscription of this observer to the given object (note that there is no need to call this method, since the destruction of the first of observer/observed will put an end to the process.

See also: observeBegin

Definition at line 36 of file CObserver.cpp.

◆ OnEvent()

virtual void mrpt::system::CObserver::OnEvent ( const mrptEvent & e )

protectedpure virtual

This virtual function will be called upon receive of any event after starting listening at any CObservable object.

Implemented in mrpt::slam::COccupancyGridMapFeatureExtractor, mrpt::graphslam::CWindowObserver, TMyExtraRenderingStuff, MyObserver, and MyObserver.

Friends And Related Function Documentation

◆ CObservable

friend class CObservable

friend

Definition at line 36 of file CObserver.h.

Member Data Documentation

◆ m_subscribed

std::set<CObservable*> mrpt::system::CObserver::m_subscribed