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  1. #include <vector>
  2. #include <iostream>
  3. class BaseWindow;
  4. class Button
  5. {
  6. public:
  7.             typedef void (BaseWindow::*BehaviorPtr)(Button *);
  8.  
  9. private:            
  10.     BaseWindow* parent;
  11.     BehaviorPtr behavior;
  12.  
  13. public:
  14.             Button(BaseWindow* parent);
  15.             template <typename T> void SetBehavior(T behavior)
  16.             {
  17.                         this->behavior = static_cast<BehaviorPtr>(behavior);
  18.             }
  19.             void Clicked(/*coords*/)
  20.             {
  21.                         if(1)
  22.                         {
  23.                                     (parent->*behavior)(this);
  24.                         }
  25.             }
  26. };
  27. class BaseWindow
  28. {
  29.             std::vector<Button*> Buttons;
  30. public:
  31.             void WindowClicked(/*coords*/)
  32.             {
  33.                     for (std::vector<Button*>::iterator it = Buttons.begin(); it != Buttons.end(); ++it) 
  34.                     {
  35.                                 (*it)->Clicked(/*coords*/);
  36.                     }
  37.             }
  38.             void AddButton(Button* butt)
  39.             {
  40.                             Buttons.push_back(butt);
  41.             }
  42. };
  43. Button::Button(BaseWindow* parent) : parent(parent), behavior()
  44. {
  45.     parent->AddButton(this);
  46. }
  47.  
  48. class UserWindow:public BaseWindow
  49. {
  50.             Button MyButton1, MyButton2;
  51. public:
  52.             void FunctionForButton1(Button* butt){ std::cout<< "Say Hello, my sweet first button" << std::endl;}
  53.             void FunctionForButton2(Button* butt){ std::cout<< "Ha ha ha!!!" << std::endl;}
  54.             UserWindow():MyButton1(this), MyButton2(this)
  55.             {
  56.                         MyButton1.SetBehavior(&UserWindow::FunctionForButton1);
  57.                         MyButton2.SetBehavior(&UserWindow::FunctionForButton2);
  58.             }
  59. };
  60. int main()
  61. {
  62.     UserWindow w;
  63.     w.WindowClicked();
  64. }
  65.  
Success #stdin #stdout 0s 15240KB
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Say Hello, my sweet first button
Ha ha ha!!!
https://ideone.com/zM6rLA
language:
C++14 (clang 8.0)
created:
7 years ago
visibility:
public

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