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  1. // 注意  以下內容通通都省略了需要delete的問題
  2.  
  3. #include <iostream>
  4. #include <vector>
  5.  
  6.  
  7. // 這可以不用看 
  8. class _Event{
  9. public:
  10.     template<typename T, typename TMemFun>
  11.     void Attach(T* obj, TMemFun mf) {_handler = new _eventHandler<T, TMemFun>(obj, mf);}
  12.     void _RaiseEvent() {_handler->f();}
  13. private:
  14.     class _eventHandlerBase;
  15. private:
  16.     _eventHandlerBase* _handler;
  17. private:
  18.     class _eventHandlerBase{
  19.     public:
  20.         virtual void f() = 0;
  21.     };
  22.  
  23.     template<typename T, typename TMemFun>
  24.     class _eventHandler : public _eventHandlerBase{
  25.     public:
  26.         _eventHandler(T* obj, TMemFun mf) : _obj(obj), _mf(mf) {}
  27.  
  28.         // overrides
  29.         void f() {(_obj->*_mf)();}
  30.     private:
  31.         T* _obj;
  32.         TMemFun _mf;
  33.     };
  34. };
  35.  
  36. // 假設出來的Happy 
  37. class Happy{
  38. public:
  39.     _Event OnSent;
  40.     _Event OnReceive;
  41.     _Event OnConnect;
  42. };
  43.  
  44. class Handler_Happy{
  45. public:
  46.     Handler_Happy(Happy* happy) : _happy(happy) {}
  47.  
  48.     // 假設處理函數都是長這樣的 
  49.     void OnSent() {std::cout << "OnSent: " << _happy << std::endl;}
  50.     void OnReceive() {std::cout << "OnReceive: " << _happy << std::endl;}
  51.     void OnConnect() {std::cout << "OnConnect: " << _happy << std::endl;}
  52.  
  53. private:
  54.     Happy *_happy;
  55. };
  56.  
  57. void test(Happy* happys[], int size_happys)
  58. {
  59.     using namespace std;
  60.     vector<Handler_Happy> handlers;
  61.  
  62.     for (int i=0; i<size_happys; i++){
  63.         handlers.push_back(Handler_Happy(happys[i]));
  64.     }
  65.  
  66.  
  67.     for (int i=0; i<size_happys; i++){
  68.         happys[i]->OnSent.Attach(&handlers[i], &Handler_Happy::OnSent);
  69.         happys[i]->OnReceive.Attach(&handlers[i], &Handler_Happy::OnReceive);
  70.         happys[i]->OnConnect.Attach(&handlers[i], &Handler_Happy::OnConnect);
  71.     }
  72. }
  73.  
  74. int main()
  75. {
  76.     Happy* happys[10];
  77.     for (int i=0; i<10; i++)
  78.         happys[i] = new Happy();
  79.  
  80.     test(happys, 10); // 假設10個 
  81.  
  82.     for (int i=0; i<10; i++)
  83.         happys[i]->OnSent._RaiseEvent();
  84.  
  85.     for (int i=0; i<10; i++)
  86.         happys[i]->OnReceive._RaiseEvent();
  87.  
  88.     for (int i=0; i<10; i++)
  89.         happys[i]->OnConnect._RaiseEvent();
  90.  
  91.     return 0;
  92. }
  93.  
Success #stdin #stdout 0.02s 2860KB
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stdin
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Standard input is empty
stdout
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OnSent: 0
OnSent: 0x99d1018
OnSent: 0x99d1028
OnSent: 0x99d1038
OnSent: 0x99d1048
OnSent: 0x99d1058
OnSent: 0x99d1068
OnSent: 0x99d1078
OnSent: 0x99d1088
OnSent: 0x99d1098
OnReceive: 0
OnReceive: 0x99d1018
OnReceive: 0x99d1028
OnReceive: 0x99d1038
OnReceive: 0x99d1048
OnReceive: 0x99d1058
OnReceive: 0x99d1068
OnReceive: 0x99d1078
OnReceive: 0x99d1088
OnReceive: 0x99d1098
OnConnect: 0
OnConnect: 0x99d1018
OnConnect: 0x99d1028
OnConnect: 0x99d1038
OnConnect: 0x99d1048
OnConnect: 0x99d1058
OnConnect: 0x99d1068
OnConnect: 0x99d1078
OnConnect: 0x99d1088
OnConnect: 0x99d1098
https://ideone.com/3m3Bf
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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