Re: Create Window (not rectangle)

From:
"mlimber" <mlimber@gmail.com>
Newsgroups:
comp.lang.c++
Date:
8 May 2006 05:13:34 -0700
Message-ID:
<1147090414.118347.91080@g10g2000cwb.googlegroups.com>
HalloUlrich wrote:

How can I create a window not as an rectangle. e.g. as a circle or
polygon.


 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.
 }

Can I use the function CreateWindow from windows-API?


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Cheers! --M

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