G4VStateDependent.hh

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//
// G4VStateDependent
//
// 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.
 
// Authors: G.Cosmo, M.Asai - November 1996
// --------------------------------------------------------------------
#ifndef G4VStateDependent_hh
#define G4VStateDependent_hh 1
 
#include "G4ApplicationState.hh"
#include "G4Types.hh"
 
class G4Event;
class G4Run;
 
class G4VStateDependent
{
 public:
  explicit G4VStateDependent(G4bool bottom = false);
  virtual ~G4VStateDependent();
  G4bool operator==(const G4VStateDependent& right) const;
  G4bool operator!=(const G4VStateDependent& right) const;
 
  virtual G4bool Notify(G4ApplicationState requestedState) = 0;
  // Pure virtual method which will be invoked by G4StateManager.
  // In case a state change must not be allowed by some reason of the
  // concrete class, false should be returned. But this scheme use is
  // NOT recommended. All commands which are state sensitive MUST assign
  // available state(s).
 
  virtual void NotifyDeletion(const G4Event*) {}
  virtual void NotifyDeletion(const G4Run*) {}
 
 private:
  G4VStateDependent(const G4VStateDependent& right);
  G4VStateDependent& operator=(const G4VStateDependent& right);
};
 
#endif