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#ifndef EVENT_INCLUDED
#define EVENT_INCLUDED
#pragma once
#include <list>
namespace GUI
{
template<class A, class B>
class EventListener
{
private:
EventListener(const EventListener&);
EventListener& operator =(const EventListener&);
public:
EventListener() {}
virtual ~EventListener() {}
virtual void notify(A arg1, B arg2) = 0;
};
template<class A>
class EventListener<A, void>
{
private:
EventListener(const EventListener&);
EventListener& operator =(const EventListener&);
public:
EventListener() {}
virtual ~EventListener() {}
virtual void notify(A arg) = 0;
};
template<>
class EventListener<void, void>
{
private:
EventListener(const EventListener&);
EventListener& operator =(const EventListener&);
public:
EventListener() {}
virtual ~EventListener() {}
virtual void notify() = 0;
};
template<class T, class A, class B = void>
class EventListenDelegate
: public EventListener<A, B>
{
private:
EventListenDelegate(const EventListenDelegate&);
EventListenDelegate& operator =(const EventListenDelegate&);
typedef void (T::*method_ptr)(A, B);
method_ptr _method;
T& _obj;
public:
EventListenDelegate(T& object, method_ptr method)
: _obj(object), _method(method)
{
}
void notify(A arg1, B arg2)
{
(_obj.*_method)(arg1, arg2);
}
};
template<class T, class A>
class EventListenDelegate<T, A, void>
: public EventListener<A, void>
{
private:
EventListenDelegate(const EventListenDelegate&);
EventListenDelegate& operator =(const EventListenDelegate&);
typedef void (T::*method_ptr)(A);
method_ptr _method;
T& _obj;
public:
EventListenDelegate(T& object, method_ptr method)
: _obj(object), _method(method)
{
}
void notify(A arg)
{
(_obj.*_method)(arg);
}
};
template<class T>
class EventListenDelegate<T, void, void>
: public EventListener<void, void>
{
private:
EventListenDelegate(const EventListenDelegate&);
EventListenDelegate& operator =(const EventListenDelegate&);
typedef void (T::*method_ptr)();
method_ptr _method;
T& _obj;
public:
EventListenDelegate(T& object, method_ptr method)
: _obj(object), _method(method)
{
}
void notify()
{
(_obj.*_method)();
}
};
template<class A, class B = void>
class Event
{
public:
typedef EventListener<A, B> listener_type;
private:
Event(const Event&);
Event& operator =(const Event&);
typedef std::list<listener_type*> listener_list;
listener_list listeners;
public:
Event() {}
~Event() {}
void addListener(listener_type* listener) { listeners.push_back(listener); }
void removeListener(listener_type* listener) { listeners.remove(listener); }
Event& operator +=(listener_type* listener) { addListener(listener); return *this; }
Event& operator -=(listener_type* listener) { removeListener(listener); return *this; }
void raise(A arg1, B arg2)
{
for (listener_list::iterator it = listeners.begin(); it != listeners.end(); ++it)
(*it)->notify(arg1, arg2);
}
};
template<class A>
class Event<A, void>
{
public:
typedef EventListener<A, void> listener_type;
private:
Event(const Event&);
Event& operator =(const Event&);
typedef std::list<listener_type*> listener_list;
listener_list listeners;
public:
Event() {}
~Event() {}
void addListener(listener_type* listener) { listeners.push_back(listener); }
void removeListener(listener_type* listener) { listeners.remove(listener); }
Event& operator +=(listener_type* listener) { addListener(listener); return *this; }
Event& operator -=(listener_type* listener) { removeListener(listener); return *this; }
void raise(A arg)
{
for (listener_list::iterator it = listeners.begin(); it != listeners.end(); ++it)
(*it)->notify(arg);
}
};
template<>
class Event<void, void>
{
public:
typedef EventListener<void, void> listener_type;
private:
Event(const Event&);
Event& operator =(const Event&);
typedef std::list<listener_type*> listener_list;
listener_list listeners;
public:
Event() {}
~Event() {}
void addListener(listener_type* listener) { listeners.push_back(listener); }
void removeListener(listener_type* listener) { listeners.remove(listener); }
Event& operator +=(listener_type* listener) { addListener(listener); return *this; }
Event& operator -=(listener_type* listener) { removeListener(listener); return *this; }
void raise()
{
for (listener_list::iterator it = listeners.begin(); it != listeners.end(); ++it)
(*it)->notify();
}
};
}
#endif // EVENT_INCLUDED
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