groupview.h

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/**
 * \file groupview.h <gre/groupview.h>
 * \brief GRE::GROUPVIEW class definitions
 *
 * \if NODOC
 * $Id: groupview.h_v 1.6 2005/09/14 21:51:28 mju Exp $
 *
 * $Log: groupview.h_v $
 * Revision 1.6  2005/09/14 21:51:28  mju
 * Add rendertype_ActiveElems.
 *
 * Revision 1.5  2005/07/19 17:06:54  mju
 * Add rendertype_Matte.
 *
 * Revision 1.4  2005/04/29 17:49:21  mju
 * Support rendertarget.
 *
 * Revision 1.3  2005/04/22 17:35:39  mju
 * Use renderbuffer class.
 *
 * Revision 1.2  2005/03/22 22:00:13  mju
 * Add resetRendered.
 *
 * Revision 1.1  2005/02/25 20:30:54  mju
 * Initial revision
 *
 * \endif
**/

#ifndef  INC_GRE_GROUPVIEW_H
#define  INC_GRE_GROUPVIEW_H

#ifndef  INC_GRE_BASE_H
   #include <gre/base.h>
#endif

#ifndef  INC_MI32_RENDERBUFFER_H
   #include <mi32/renderbuffer.h>
#endif


namespace GRE {

//===================================================================================================================

//! Container for layer information retained for each view.
class GROUPVIEW {
   public:

      //! Rendering buffer types.
      enum RENDERTYPE {
         RENDERTYPE_Group =      0,
         RENDERTYPE_ActiveElems,
         RENDERTYPE_Matte,
         RENDERTYPE_Overlay,
         RENDERTYPE_COUNT
         };

      //! Constructor.
      GROUPVIEW (
         GRE_GROUP *group,
         GRE_VIEW *view
         );

      ~GROUPVIEW ();

      //! Check if existing renderings are still valid.
      void CheckRendered (
         );

      //! Compute all transformations.
      ERRVALUE ComputeTrans (
         );

      //! Draw all 'active' elements to overlay buffer.
      ERRVALUE DrawActiveOverlay (
         );

      //! Get 3D viewpoint.
      const GRE_VIEWPOINT3D* Get3dViewPoint (
         ) const { return (m_pViewPoint3D); }

      //! Get device rectangle used for rendering.
      //! This is a nominal rectangle based on layer extents and may not account for
      //! symbology and marginalia.  Returned rectangle may not be suitable for clipping
      //! during drawing, but will be suitable for selection of source object elements.
      const LRECT2D& GetDeviceRectUsed (
         ) const { return (m_CurDevRectUsed); }

      //! Get associated GRE_GROUP.
      GRE_GROUP* GetGroup (
         ) const { return (m_group); }

      //! Get rendering buffer for specified rendering type (const).
      const RENDERBUFFER& GetRenderBuffer (
         RENDERTYPE RenderType                           //!< Rendering type
         ) const { return (m_RenderBuffer[RenderType]); }

      //! Get rendering buffer for specified rendering type (non-const).
      RENDERBUFFER& GetRenderBuffer (
         RENDERTYPE RenderType                           //!< Rendering type
         ) { return (m_RenderBuffer[RenderType]); }

      //! Get rotation angle.
      double GetRotationAngle (
         ) const { return (m_RotationAngle); }

      //! Get rotation cosine.
      double GetRotationCos (
         ) const { return (m_RotationCos); }

      //! Get rotation sine.
      double GetRotationSin (
         ) const { return (m_RotationSin); }

      //! Get associated GRE_VIEW.
      GRE_VIEW* GetView (
         ) const { return (m_view); }

      //! Determine if drawing in 3D.
      bool Is3D (
         ) const { return (m_Is3D); }

      //! Determine if drawing 3D in stereo.
      bool Is3dStereo (
         ) const;

      //! Determine if group overlaps view device display area.
      bool IsGroupOverlappedDevice (
         ) const { return (m_GroupOverlapsDevice); }

      //! Reset rendered status so redraws.
      void ResetRendered (
         GRE::RENDERTARGET target = GRE::RENDERTARGET_GroupAll
         );

   private:
      #ifndef GENERATING_DOXYGEN_OUTPUT
      GRE_GROUP *m_group;
      GRE_VIEW *m_view;
      RENDERBUFFER m_RenderBuffer[RENDERTYPE_COUNT];
      GRE_VIEWPOINT3D *m_pViewPoint3D;          // 3D viewpoint
      DRECT2D m_NewTgtRectFull;                 // New full rectangle in target device coordinates, based on transformation
      DRECT2D m_CurTgtRectFull;                 // Current full rectangle in target device coordinates used by layer
      LRECT2D m_NewDevRectUsed;                 // New clipped rectangle on device used, based on transformation
      LRECT2D m_CurDevRectUsed;                 // Current clipped rectangle on device used
      double m_RotationAngle;                   // Rotation angle
      double m_RotationCos;                     // Rotation angle cosine
      double m_RotationSin;                     // Rotation angle sine
      bool m_Is3D;                              // Set if drawing in 3D
      bool m_GroupOverlapsDevice;

      GROUPVIEW (const GROUPVIEW&);
      GROUPVIEW& operator= (const GROUPVIEW&);

      #endif // GENERATING_DOXYGEN_OUTPUT
   };

//===================================================================================================================

}  // End namespace GRE

#endif   // INC_GRE_GROUPVIEW_H

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