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//
// G4VTrackingManager
//
// Class description:
//
// Interface class for implementing a custom tracking manager that is
// specialized for stepping one or a small number of particle types.
//
// Original author: Jonas Hahnfeld, 2021

#ifndef G4VTrackingManager_hh
#define G4VTrackingManager_hh 1

class G4ParticleDefinition;
class G4Track;

////////////////////////
class G4VTrackingManager
////////////////////////
{
 public:
  virtual ~G4VTrackingManager() = default;

  // Messaged by the Particle definition whenever cross-section tables have
  // to be rebuilt (i.e. if new materials have been defined).
  virtual void BuildPhysicsTable(const G4ParticleDefinition&) {}

  // Messaged by the Particle definition whenever cross-section tables have
  // to be prepared for rebuild (i.e. if new materials have been defined).
  virtual void PreparePhysicsTable(const G4ParticleDefinition&) {}

  // Invoking this function, a G4Track given by the argument will be
  // handed over to this tracking manager. It may be tracked immediately
  // or processing may be deferred to a later time, at the latest when
  // calling FlushEvent().
  virtual void HandOverOneTrack(G4Track* aTrack) = 0;

  // Signal that all tracks in the current event have been finished and
  // this manager should process all tracks that may have been deferred.
  // When called via this method, the tracking manager may stack new
  // secondaries which will be tracked afterwards.
  virtual void FlushEvent() {}
};

#endif