llmediaemitter.h

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#ifndef LLMEDIAEMITTER_H
#define LLMEDIAEMITTER_H

#include <list>
#include <algorithm>
#include <typeinfo>

//
template< class T >
class LLMediaEmitter
{
        public:
                LLMediaEmitter() { };
                ~LLMediaEmitter() { };

                typedef typename T::EventType EventType;
                typedef std::list< T* > ObserverContainer;
                typedef void( T::*observerMethod )( const EventType& );

                //
                bool addObserver( T* observer_in )
                {
                        if ( ! observer_in )
                                return false;

                        if ( std::find( observers.begin(), observers.end(), observer_in) != observers.end() )
                                return false;

                        observers.push_back( observer_in );

                        return true;
                };

                //
                bool remObserver( T* observer_in )
                {
                        if ( ! observer_in )
                                return false;

                        observers.remove( observer_in );
                        observers.remove( observer_in );
                        observers.remove( observer_in );



                        return true;
                };

                //
                void update( observerMethod method, const EventType& msgIn )
                {
                        typename std::list< T* >::iterator iter = observers.begin();

                        while( iter != observers.end() )
                        {
                                ( ( *iter )->*method )( msgIn );

                                ++iter;
                        };
                };

        protected:
                ObserverContainer observers;
};

#endif  // LLMEDIAEMITTER_H

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