ObserverCollection.h

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#ifndef __OBSERVERCOLLECTION_H
#define __OBSERVERCOLLECTION_H

#include <list>

template<class T>
class ObserverCollection
{
protected:
    std::list<T*> _listeners;

public:
    void addListener(T* listener)
    {
        _listeners.push_back(listener);
    }

    void removeListener(T* listener)
    {
        _listeners.remove(listener);
    }

    void notify()
    {
        for(std::list<T*>::iterator it = _listeners.begin(); it != _listeners.end(); it++)
            (*it)->update();
    }
};

#endif