Model binding

TStandardCanvasModelSelection implements the MCanvasSelection GetCanvasRepresentation and Invalidate functions to bind itself to a standard canvas model. The Invalidate function sends a TStandardCanvasSelectionNotification, which has a model interest, a copy of the selection, and the changed area.

The following code fragment shows the TStandardCanvasSelectionNotification class constructor and accessor functions.

      TStandardCanvasSelectionNotification(   const TModelInterest&, 
    
                 const TStandardCanvasModelSelection&,
    
   const TGArea );
  
  virtual const TStandardCanvasModelSelection* GetSelection() const;
  virtual TGArea GetArea() const;
  virtual GetArea( TGArea& ) const;
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