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#pragma once
#include "Observer.h"
#include <list>
class Subject
{
public:
Subject();
virtual ~Subject();
//--------------------------------------------------------------------------
// Description : Notify all observers of a state change
//--------------------------------------------------------------------------
void notify();
//--------------------------------------------------------------------------
// Description : Attach an observer to the subject
// Parameters : observer - the observer
//--------------------------------------------------------------------------
void attach(Observer &observer);
//--------------------------------------------------------------------------
// Description : Detach an observer from the subject
// Parameters : observer - the observer
//--------------------------------------------------------------------------
void detach(const Observer &observer);
private:
//--------------------------------------------------------------------------
// Description : Disallow assignment operator and copy constructor
//--------------------------------------------------------------------------
Subject(const Subject &rhs);
const Subject & operator=(const Subject &rhs);
std::list<Observer *> m_observer_list;
};
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