// 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 statement,
// and all its terms.
//
// $Id: G4Xt.hh,v 1.4 1999/12/15 14:50:47 gunter Exp $
// GEANT4 tag $Name: geant4-02-00 $
//
//  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
