klips/cpp/patterns/observer/observer.hpp

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2021-05-11 23:58:23 +00:00
#ifndef OBSERVER_HPP
#define OBSERVER_HPP
#include <string>
#include <list>
#include <iostream>
#include "observer.hpp"
class Observer;
class Subject {
public:
Subject(std::string name_) : name(name_) {}
virtual ~Subject() { std::cout << name << " subject destroyed\n";}
void Attach(Observer * o) { observerList.push_back(o);}
void Detach(Observer * o) { observerList.remove(o);}
void Notify();
void SendMessage(std::string message_);
inline std::string getName() const { return name;}
private:
std::list<Observer *> observerList;
std::string message, name;
};
/******************************************************************************/
// Observer
class Observer {
public:
Observer(Subject &s);
void Update(std::string &message);
void Detach();
private:
Subject &subject;
int number;
static int totalObservers;
};
#endif // OBSERVER_HPP