//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
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// ********************************************************************
//
//
//
//
// Andrew Walkden  7th February 1997
// Class G4OpenGLStoredViewer : Encapsulates the `storedness' of
//                              an OpenGL viewer, for inheritance by
//                              derived (X, Xm...) classes.

#if defined (G4VIS_BUILD_OPENGL_DRIVER) || defined (G4VIS_USE_OPENGL)

#ifndef G4OPENGLSTOREDVIEWER_HH
#define G4OPENGLSTOREDVIEWER_HH

#include "G4OpenGLViewer.hh"

class G4OpenGLStoredSceneHandler;
class G4Colour;
class G4Text;
class G4Circle;

class G4OpenGLStoredViewer: virtual public G4OpenGLViewer {
  
public:
  G4OpenGLStoredViewer (G4OpenGLStoredSceneHandler& scene);
  virtual ~G4OpenGLStoredViewer ();
  
protected:
  void KernelVisitDecision ();
  virtual G4bool CompareForKernelVisit(G4ViewParameters&);
  
  void DrawDisplayLists ();

  virtual void DisplayTimePOColourModification
  (G4Colour&, size_t /*currentPOListIndex*/) {}

  void AddPrimitiveForASingleFrame(const G4Text& text);
  void AddPrimitiveForASingleFrame(const G4Circle& circle);

  G4OpenGLStoredSceneHandler& fG4OpenGLStoredSceneHandler;

  G4ViewParameters fLastVP;  // Memory for making kernel visit decisions.
  
  // Two virtual functions to return sub-class selection.
  virtual G4bool POSelected(size_t) {return true;}
  virtual G4bool TOSelected(size_t) {return true;}
  
  G4bool fDepthTestEnable;
  G4Colour fOldDisplayListColor;
};

#endif

#endif
