#include <iostream>
#include "EventDistributor.h"

int main(void)
{

    EventDistributor ed;
    EventDistributor::EventUser eu ( &ed );

    return 0;
}

/*
 * @author xxx
 */

#ifndef EVENTDISTRIBUTOR_H_
#define EVENTDISTRIBUTOR_H_

#include <set>
#include <boost/foreach.hpp>

class EventDistributor
{

public:

	class EventUser
	{
	public:
		EventUser( EventDistributor *_distributor )
		: m_distributor( _distributor )
		{
			m_distributor->addeventuser( this );
		}

		virtual ~EventUser()
		{
			m_distributor->unregister( this );
		}

		// Call this method to trigger all EventUsers.
		void trigAll()
		{
			m_distributor->trigAll();
		}

		virtual void trigger();

	protected:
		EventDistributor* m_distributor;
	};

	EventDistributor()
	{}

	void addeventuser( EventUser *_eus )
	{
		m_users.insert( _eus );
	}

	void unregister( EventUser *_eus )
	{
		m_users.erase( _eus );
	}

	void trigAll()
	{
		BOOST_FOREACH(EventUser* user, m_users)
		{
			user->trigger();
		}
	}

protected:
	std::set<EventUser*> m_users;

};

#endif /* EVENTDISTRIBUTOR_H_ */

/tmp/cpp>g++ main.cpp 
/tmp/ccwtukDZ.o: In function `EventDistributor::EventUser::EventUser(EventDistributor*)':
main.cpp:(.text._ZN16EventDistributor9EventUserC2EPS_[_ZN16EventDistributor9EventUserC5EPS_]+0x17): undefined reference to `vtable for EventDistributor::EventUser'
/tmp/ccwtukDZ.o: In function `EventDistributor::EventUser::~EventUser()':
main.cpp:(.text._ZN16EventDistributor9EventUserD2Ev[_ZN16EventDistributor9EventUserD5Ev]+0x13): undefined reference to `vtable for EventDistributor::EventUser'

virtual void trigger();