Re: Create Window (not rectangle)

HalloUlrich wrote:


 class Shape
 {
 public:
   virtual void Draw() = 0;
   // ...
 };

 class Circle : public Shape
 {
 public:
   virtual void Draw() { /*...*/ }
   // ...
 };

 class Polygon : public Shape
 {
 public:
   virtual void Draw() { /*...*/ }
   // ...
 };

 class Window
 {
 public:
   Window( std::auto_ptr<Shape> windowShape )
     : windowShape_( windowShape )
   {}

   virtual void Draw() { /*... use windowShape_ ... */ }

   // ...

 private:
   std::tr1::scoped_ptr<Shape> windowShape_;
 };

 std::auto_ptr<Window> CreateCircularWindow()
 {
   std::auto_ptr<Shape> windowShape( new Circle( /*...*/ ) );
   return std::auto_ptr<Window>( new Window( windowShape ) );
 }

 void Foo()
 {
   std::auto_ptr<Window> window( CreateCircularWindow() );
   // ... Now a circular window has been created. Q.E.D.
 }


Unlike the standard C++ question above, this is off-topic here. See the
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to get an answer to your question:

http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.9

Cheers! --M