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| #include <cstdlib>
class Button;
class Window
{
public:
void AddButton(Button* b)
{
// ajout du bouton dans la fenêtre, qui est son gestionnaire
// (affichage, gestion events, desallocation, etc)
}
};
class Button
{
public:
Button(Window* owner, int x, int y)
{
owner->AddButton(this);
owner_ = owner;
callback_ = NULL;
}
void SetCallback(void (Window::*callback)(Button*))
{
callback_ = callback;
}
void OnClick()
{
if (callback_ != NULL)
{
(owner_->*callback_)(this);
}
}
private:
void (Window::*callback_)(Button*);
Window* owner_;
};
class MyWin: public Window
{
public:
MyWin()
{
typedef void (Window::*HACK)(Button*);
button_ = new Button(this, 42, 42);
button_->SetCallback((HACK) &MyWin::Hey); // ne compile pas, sauf si cast !
}
void Hey(Button* emitter)
{
// le code de la callback
}
private:
Button* button_;
};
int main()
{
MyWin pouet;
} |
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