//
// ********************************************************************
// * 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: G4VStateDependent.hh,v 1.3 2001/07/11 10:00:53 gunter Exp $
// GEANT4 tag $Name: geant4-07-00-cand-01 $
//
// 
// ------------------------------------------------------------
//      GEANT 4 class header file 
//
//
//      ---------------- G4VStateDependent ----------------
//
// Authors: G.Cosmo, M.Asai - November 1996
//
// ------------------------------------------------------------
//
// Class description:
//
// Abstract base class of all classes which need to be notified when
// the state of Geant4 changes. The concrete class object derived from
// this base class will be automatically registered to G4StateManager
// and the virtual method Notify() will be invoked when the state changes.

// ------------------------------------------------------------

#ifndef G4VStateDependent_h
#define G4VStateDependent_h 1

#include "globals.hh"
#include "G4ApplicationState.hh"

class G4VStateDependent
{

public:

  G4VStateDependent(G4bool bottom=false);
  virtual ~G4VStateDependent();
  G4int operator==(const G4VStateDependent &right) const;
  G4int operator!=(const G4VStateDependent &right) const;

public: // with description

  virtual G4bool Notify(G4ApplicationState requestedState) = 0;
    // Pure virtual method which will be invoked by G4StateManager.
    // In case state change must not be allowed by some reason of the
    // concrete class, false should be returned. But this scheme is
    // NOT recommended to use. All command which are state sensitive
    // MUST assign available state(s).

private:

  G4VStateDependent(const G4VStateDependent &right);
  G4VStateDependent& operator=(const G4VStateDependent &right);

};

#endif