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//
// $Id: G4VisExecutive.hh,v 1.6 2006/06/29 21:28:50 gunter Exp $
// GEANT4 tag $Name:  $
//
// 
// John Allison 2nd February 2005 (based on MyVisManager, 24th January 1998).
//
// Class description
//
// Concrete Visualization Manager that implements the virtual
// functions RegisterGraphicsSystems and RegisterModelFactories.  This
// is executed when you Initialise() or Initialize() the vis manager.
// It exploits C-pre-processor variables G4VIS_USE_DAWN, etc., which
// are set by the GNUmakefiles if environment variables of the same
// name are set.
//
// Include this file and write code to instantiate G4VisExecutive just
// once as beginning of operations.  Before you compile, set
// appropriate environment variables.  If you change your environment
// you must force recompilation (the make files will not detect the
// need to do this).  Typically, your main program file will contain:
//
// #ifdef G4VIS_USE
// #include "G4VisExecutive.hh"
// #endif
// ...
// int main() {
//   ...
// #ifdef G4VIS_USE
//   // Instantiate and initialise Visualization Manager.
//   G4VisManager* visManager = new G4VisExecutive;
//   //  visManager -> SetVerboseLevel (verbosityString);
//   //  visManager -> RegisterGraphicsSystem (new G4XXX);
//   visManager -> Initialize ();
// #endif
//   ...
// #ifdef G4VIS_USE
//   G4cout << "Deleting vis manager..." << G4endl;
//   delete visManager;
//   G4cout << "Vis manager deleted." << G4endl;
// #endif
//
// The implementation is included as an .icc file because - for those
//   graphics systems that need external libraries - only those
//   systems that have been selected by the flags may be instantiated
//   without causing unresolved references (only the user knows which
//   libraries are available on his/her computer).  It also ensures
//   that libraries can be linked in the right order, without circular
//   dependencies.  (Note that some graphics systems, notable those
//   that write files for off-line viewing, do not suffer these
//   restrictions and are always registered.)  Additional graphics
//   systems, XXX say, can be individually registered before
//   invocation of Initialise() with RegisterGraphicsSystem(new XXX).
//
// Alternatively, you can implement an empty function here and just
//   register the systems you want in your main(), e.g.:
//   G4VisManager* visManager = new G4VisExecutive;
//   visManager -> RegisterGraphicsSystem (new MyGraphicsSystem);
//
// See class description of G4VisManager for more details.

#ifndef G4VISEXECUTIVE_HH
#define G4VISEXECUTIVE_HH

#include "G4VisManager.hh"

class G4VisExecutive: public G4VisManager {

public: // With description

  G4VisExecutive ();

private:

  void RegisterGraphicsSystems();
  void RegisterModelFactories();

};

#include "G4VisExecutive.icc"

#endif
