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 //
 // ********************************************************************
 // * License and Disclaimer                                           *
 // *                                                                  *
 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
 // * conditions of the Geant4 Software License,  included in the file *
 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
 // * include a list of copyright holders.                             *
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 // * work  make  any representation or  warranty, express or implied, *
 // * regarding  this  software system or assume any liability for its *
 // * use.  Please see the license in the file  LICENSE  and URL above *
 // * for the full disclaimer and the limitation of liability.         *
 // *                                                                  *
 // * This  code  implementation is the result of  the  scientific and *
 // * technical work of the GEANT4 collaboration.                      *
 // * By using,  copying,  modifying or  distributing the software (or *
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 // * acceptance of all terms of the Geant4 Software license.          *
 // ********************************************************************
 //
 //
 //
 // 
 // 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 at beginning of operations.  Before you compile, set
 // appropriate environment variables (usually using "./Configure").
 // 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;    // See Note (a).
 //   visManager -> SetVerboseLevel (verbosityString);  // See Note (b).
 //   visManager -> RegisterGraphicsSystem (new myGS);  // See Note (c).
 //   visManager -> Initialize ();                      // See Note (d).
 // #endif
 //   ...
 // #ifdef G4VIS_USE
 //   G4cout << "Deleting vis manager..." << G4endl;
 //   delete visManager;
 //   G4cout << "Vis manager deleted." << G4endl;
 // #endif
 //
 // Notes:
 // (a) After instantiation, all references to this object should be as
 //     a G4VisManager.  The functions RegisterGraphicsSystems and
 //     RegisterModelFactories defined in G4VisExecutive.icc are
 //     virtual functions of G4VisManager.  They are invoked by
 //     G4VisManager::Initialise.  If you need to initialise in a
 //     separate file, see advice below.
 // (b) The verbosityString ("quiet", "errors", "warnings",
 //     "confirmations", etc. - "help /vis/verbose" to see options) can be
 //     set here or with /vis/verbose.  Alternatively, you can instantiate
 //     with a verbosity string. e.g:
 //       G4VisManager* visManager = new G4VisExecutive("quiet");
 // (c) You can register your own graphics system like this.
 // (d) Your can intialise like this with C++ code or use /vis/initialize.
 //
 // If you need to perform the instantiation and the initialisation in
 // separate files, e.g., to establish the verbosity before
 // initialisation, then the code that initialises must have access, of
 // course, to the G4VisExecutive object, but this should be as a
 // G4VisManager object, i.e., #include "G4VisManager.hh".
 // RegisterGraphicsSystems and RegisterModelFactories are (pure)
 // virtual methods of G4VisManager called from G4VisManager::Initialize.
 // First file:
 // #include "G4VisExecutive.hh"
 // ...
 //   fpVisManager = new G4VisExecutive;
 // where fpVisManager is a G4VisManager*.
 // Second file:
 // #include "G4VisManager.hh"
 // ...
 //   fpVisManager -> Initialize ();
 // where there is some mechanism for getting access to the pointer
 // fpVisManager.
 //
 // 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.)
 //
 // 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(const G4String& verbosityString = "warnings");
   G4VisExecutive(int argc, char** argv, const G4String& system = "",
                  const G4String& verbosityString = "warnings");
 
 private:
 
   void SetDefaultsByArgument(const G4String& system);
   void SetDefaultsByEnvironment();
   void SetDefaultsByFile(int argc, char** argv);
   void SetDefaultsByBatch();
   void SetDefaultsByBuildFlags();
   G4bool fSelected;
   
   void RegisterGraphicsSystems();
   void RegisterModelFactories();
 
 };
 
 #include "G4VisExecutive.icc"
 
 #endif

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