std C++ slot signal机制

#include <iostream> #include <vector> #include <functional> #include <algorithm> using namespace std; class A{ public: void Clicked(int id) { cout << "A::Clicked" << endl; } }; class B{ public: void Clicked(int id) { cout << "B::Clicked" << endl; } }; class SlotBase{ public: virtual void OnSignal(int id) = 0; }; template<class T> class Slot : public SlotBase{ public: typedef void (T::*MemberFuncType)(int); Slot(T* obj, MemberFuncType func) :obj_(obj), func_(func) { } virtual void OnSignal(int id) { (obj_->*func_)(id); } private: T* obj_; MemberFuncType func_; }; template<class T> SlotBase* MakeSlot(T * p, void (T::*func)(int)) { return new Slot<T>( p, func ) ; } class Signal { public: virtual ~Signal() { std::for_each(slots_.begin(), slots_.end(), SignalDelete()); } struct SignalDelete: public unary_function<SlotBase*, void> { public: void operator()(SlotBase*& slot) const { delete slot; } }; struct SignalAction: public binary_function<SlotBase*, int, void> { public: void operator()(SlotBase*& slot, const int& i) const { slot->OnSignal(i); } }; void signal(int id) { std::for_each(slots_.begin(), slots_.end(), bind2nd(SignalAction(), id)); } void connect( SlotBase* s) { slots_.push_back(s); } protected: vector< SlotBase* > slots_; }; int _tmain(int argc, _TCHAR* argv[]) { A a; B b; Signal signal; signal.connect(MakeSlot(&a, &A::Clicked)); signal.connect(MakeSlot(&b, &B::Clicked)); signal.signal(1); return 0; }