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