Designing a framework for a game engine using C++

#include "stdafx.h"
#include <iostream>
 
using namespace std;
 
/* Component (interface) */
class Widget {
 
public: 
  virtual void draw() = 0; 
  virtual ~Widget() {}
};  
 
/* ConcreteComponent */
class TextField : public Widget {
 
private:                  
   int width, height;
 
public:
   TextField( int w, int h ){ 
      width  = w;
      height = h; 
   }
 
   void draw() { 
      cout << "TextField: " << width << ", " << height << '\n'; 
   }
};
 
/* Decorator (interface) */                                           
class Decorator : public Widget {
 
private:
   Widget* wid;       // reference to Widget
 
public:
   Decorator( Widget* w )  { 
     wid = w; 
   }
 
   void draw() { 
     wid->draw(); 
   }
 
   ~Decorator() {
     delete wid;
   }
};
 
/* ConcreteDecoratorA */
class BorderDecorator : public Decorator { 
 
public:
   BorderDecorator( Widget* w ) : Decorator( w ) { }
   void draw() { 
      Decorator::draw();    
      cout << "   BorderDecorator" << '\n'; 
   }  
};
 
/* ConcreteDecoratorB */
class ScrollDecorator : public Decorator { 
public:
   ScrollDecorator( Widget* w ) : Decorator( w ) { }
   void draw() {
      Decorator::draw(); 
      cout << "   ScrollDecorator" << '\n';
   }  
};
 
int _tmain(int argc, _TCHAR* argv[]) {
 
   Widget* aWidget = new BorderDecorator(
                     new ScrollDecorator(
                     new TextField( 80, 24 )));
   aWidget->draw();
   delete aWidget;
   return 0;
}