gre/viewpos.h

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#ifndef  INC_GRE_VIEWPOS_H
#define  INC_GRE_VIEWPOS_H

#ifndef INC_GRE_VIEWPLACE_H
   #include <gre/viewplace.h>
#endif

#ifndef INC_MI32_TRANS2DAFFINE_H
   #include <mi32/trans2daffine.h>
#endif

namespace GRE {
//===================================================================================================================

class VIEWPOS {
   public:
   
      VIEWPOS ();

      ~VIEWPOS ();

      const DPOINT2D& GetCenterPoint (
         ) const { return (m_ViewPlace.GetPoint()); }

      const SPATREF::COORDREFSYS& GetCenterCRS (
         ) const { return (m_ViewPlace.GetCoordRefSys()); }

      double GetMapScale (
         ) const { return (m_ViewPlace.GetSize()); }

      const VIEWPLACE& GetPlace (
         ) const { return (m_ViewPlace); }

      const TRANS2D_AFFINE& GetTransViewDevice (
         ) const { return (m_TransViewToDevice); }

      const DPOINT2D& GetZoom (
         ) const { return (m_Zoom); }

      void ScaleZoom (
         double scale
         ) { m_Zoom *= scale; }

      void SetCenterPoint (
         const SPATREF::COORDREFSYS& CenterCRS,
         const DPOINT2D& CenterPoint
         ) { m_ViewPlace.SetPoint(CenterCRS,CenterPoint); }

      void SetCenterPoint (
         const DPOINT2D& CenterPoint
         ) { m_ViewPlace.SetPoint(CenterPoint); }

      void SetMapScale (
         double MapScale
         ) { m_ViewPlace.SetSize(MapScale); }

      void SetPlace (
         const VIEWPLACE& ViewPlace
         ) { m_ViewPlace = ViewPlace; }

      void SetTransViewDevice (
         const TRANS2D_AFFINE& TransViewDevice
         ) { m_TransViewToDevice = TransViewDevice; }

      void SetZoom (
         double zoom
         ) { m_Zoom.x = m_Zoom.y = zoom; }

      void SetZoom (
         const DPOINT2D& zoom
         ) { m_Zoom = zoom; }

      void ValidateZoom (
         bool AllowDifferXY
         );

   private:
      #ifndef GENERATING_DOXYGEN_OUTPUT
      VIEWPLACE m_ViewPlace;
      TRANS2D_AFFINE m_TransViewToDevice;    // Transformation between view and device
      DPOINT2D m_Zoom;                       // Zoom factor, full view = 1.0
      #endif // GENERATING_DOXYGEN_OUTPUT
   };

//===================================================================================================================
}  // End namespace GRE

#endif   // INC_GRE_VIEWPOS_H

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