//
// ********************************************************************
// * DISCLAIMER                                                       *
// *                                                                  *
// * The following disclaimer summarizes all the specific disclaimers *
// * of contributors to this software. The specific disclaimers,which *
// * govern, are listed with their locations in:                      *
// *   http://cern.ch/geant4/license                                  *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.                                                             *
// *                                                                  *
// * This  code  implementation is the  intellectual property  of the *
// * GEANT4 collaboration.                                            *
// * By copying,  distributing  or modifying the Program (or any work *
// * based  on  the Program)  you indicate  your  acceptance of  this *
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// ********************************************************************
//
//
// $Id: G4Xt.hh,v 1.5 2001/07/11 10:01:22 gunter Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
//  To unify X11 event treatment between 
// G4/interfaces Xt sessions and G4/visualizations Xt drivers.
// G.Barrand

#ifndef G4XT_HH
#define G4XT_HH

#if defined(G4INTY_BUILD_XT) || defined(G4INTY_USE_XT)

#include <X11/Intrinsic.h>

#include "G4VInteractorManager.hh"

// Class description :
//
//  G4Xt : a singleton to handle GUI sessions and visualization 
// drivers built over Xt. It permits to have one Xt main loop for 
// the whole application. The Xt toolkit is inited in the 
// constructor. It is done once for the whole application.
//
// Class description - end :

class G4Xt : public G4VInteractorManager {
public:
  static G4Xt* getInstance();
  static G4Xt* getInstance(int,char**,char*);
  void PutStringInResourceDatabase(char*);
  G4bool Inited();
  void* GetEvent();
  void FlushAndWaitExecution();
  virtual ~G4Xt();                     
private:
  G4Xt (int,char**,char*);                     
  static G4Xt* instance; // Pointer to single instance.
};

#endif //HAS_XT

#endif