40 lines
856 B
C++
40 lines
856 B
C++
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#include "observer.hpp"
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void Subject::Notify()
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{
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for (const auto &o : observerList) { o->Update(message);}
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}
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void Subject::SendMessage(std::string message_)
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{
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message = message_;
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Notify();
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}
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/******************************************************************************/
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// Observer
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int Observer::totalObservers = 0;
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Observer::Observer(Subject &s) : subject(s) {
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std::cout << "Observer " << ++totalObservers << " is subscribed to "
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<< s.getName() << "\n";
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s.Attach(this);
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number = totalObservers;
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}
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void Observer::Update(std::string &message)
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{
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std::cout << "Observer " << number << " has message from "
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<< subject.getName() << ": " << message;
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}
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void Observer::Detach()
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{
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std::cout << "Observer " << number << " has detached from "
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<< subject.getName() << std::endl;
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subject.Detach(this);
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}
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