mets::subject< observed_subject > Class Template Reference

template class for subjects (cfr. Observer Design Pattern). More...

#include <observer.hh>

Collaboration diagram for mets::subject< observed_subject >:

[legend]

List of all members.

Public Member Functions
virtual void	attach (observer< observed_subject > &o)
	Attach a new observer to this subject.
virtual void	detach (observer< observed_subject > &o)
	Detach a new observer to this subject.
virtual void	notify ()
	Notify all attached observers.
Protected Attributes
std::set< observer < observed_subject > * >	observers_m

---

Detailed Description

template<typename observed_subject>
class mets::subject< observed_subject >

template class for subjects (cfr. Observer Design Pattern).

You must declare the subject of the observations with:

class my_observed_sbj : public subject<my_observed_sbj>

Than you should call notify() manually or automatically from every method that changes the subject status.

Only attached observers (cfr. attach() and detach() methods) will be notified.

---

Member Function Documentation

template<typename observed_subject>

void mets::subject< observed_subject >::attach

(

observer< observed_subject< observed_subject > > &

o

)

[inline, virtual]

Attach a new observer to this subject.

Parameters:

o,:

a new observer for this subject. if the observer was already present nothing happens.

template<typename observed_subject>

void mets::subject< observed_subject >::detach

(

observer< observed_subject< observed_subject > > &

o

)

[inline, virtual]

Detach a new observer to this subject.

Parameters:

o,:

observer to detach from this subject. if the observer "o" was not present nothing happens.

template<typename observed_subject >

void mets::subject< observed_subject >::notify

(

)

[inline, virtual]

Notify all attached observers.

When this method is called every observed_subject::update method is called and "this" subject is passed as a param.

---

The documentation for this class was generated from the following file:

• metslib/observer.hh