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// $Id: XrayFluoPrimaryGeneratorAction.hh
// GEANT4 tag $Name:  xray_fluo-V03-02-00
//
// Author: Elena Guardincerri (Elena.Guardincerri@ge.infn.it)
//
// History:
// -----------
//  28 Nov 2001  Elena Guardincerri   Created
//
// -------------------------------------------------------------------


#ifndef XrayFluoPrimaryGeneratorAction_h
#define XrayFluoPrimaryGeneratorAction_h 1

#include "G4VUserPrimaryGeneratorAction.hh"
#include "globals.hh"
#include "G4DataVector.hh"
#include "G4ThreeVector.hh"
#include <vector>

class G4ParticleGun;
class G4Event;
class XrayFluoDetectorConstruction;
class XrayFluoPrimaryGeneratorMessenger;
class XrayFluoRunAction;

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....

class XrayFluoPrimaryGeneratorAction : public G4VUserPrimaryGeneratorAction
{
  public:

    XrayFluoPrimaryGeneratorAction(XrayFluoDetectorConstruction*); 
   
   ~XrayFluoPrimaryGeneratorAction();

  public:
  void GeneratePrimaries(G4Event*);

  //method to set a random impact point on the sample
  void SetRndmFlag(G4String val) { rndmFlag = val;}

  //method to choose a circular non-point source
  void SetRndmVert (G4String val) { beam = val;}

  //set the flag for shooting particles according to certain spectra 
  void SetSpectrum (G4String val) { spectrum= val  ;}

 //set the flag for shooting particles from an isotropic source
  void SetIsoVert  (G4String val) { isoVert = val  ;}

  //load data created in previous runs 
  void ActivatePhaseSpace(G4String);

  //load Raileigh scattered photon from previously loaded data
  void SetRayleighFlag (G4bool);


private:
//pointer a to G4 service class
  G4ParticleGun*                particleGun;	  

  //pointer to the geometry
  XrayFluoDetectorConstruction*    XrayFluoDetector;  
  
  //messenger of this class
  XrayFluoPrimaryGeneratorMessenger* gunMessenger; 

  XrayFluoRunAction*  runManager;
  
  //flag for a random impact point 
  G4String                      rndmFlag;   
  
  //flag for a circular non-point source
  G4String                      beam;

 //flag  for shooting particles according to certain spectra 
  G4String                      spectrum;

 //flag  for shooting particles from an isotropic source
  G4String                      isoVert;

  //flag for the use of phase-space created with a previous run
  G4bool phaseSpaceGunFlag;

  // the flag to load  particle coming from Rayleigh scattering
  G4bool rayleighFlag; 

  // data for storage of phase space previously  created
  std::vector<G4double>* particleEnergies;
  std::vector<G4String>* particleTypes;

  G4ThreeVector detectorPosition;



};

#endif