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// $Id$
//
/// \file errorpropagation/include/ExErrorDetectorConstruction.hh
/// \brief Definition of the ExErrorDetectorConstruction class
//

#ifndef ExErrorDetectorConstruction_hh
#define ExErrorDetectorConstruction_hh 1

#include "globals.hh"
#include "G4VUserDetectorConstruction.hh"
#include "ExErrorMagneticField.hh"

class G4Box;
class G4LogicalVolume;
class G4VPhysicalVolume;
class G4Material;
class ExErrorDetectorMessenger;
class G4UserLimits;

/// Detector construction class
///
///  Creates a simplified typical HEP detector: 
///    An air beamline ( BEAM )
///    An air central detector ( CDET )
///    A copper calorimeter, divided in four ( ECAL )
///    An aluminium calorimeter, divided in ten ( HCAL )
///    An air muon detector ( MUON )
///
/// History:
/// Created:  May 2007
/// \author   P. Arce 
//------------------------------------------------------------------------

class ExErrorDetectorConstruction : public G4VUserDetectorConstruction
{
public:
  
  ExErrorDetectorConstruction();
  ~ExErrorDetectorConstruction();
  
  virtual G4VPhysicalVolume* Construct();
  
  void SetMagField(G4double);

private:
  G4double fXBEAM;
  G4double fXCDET;
  G4double fXECAL;
  G4double fXSOLN;
  G4double fXHCAL;
  G4double fXMUON;
  G4double fNdivECAL;
  G4double fNdivHCAL;
  G4double fYZLength;
  G4double fXHalfWorldLength;


  G4UserLimits* fUserLimits;
  
  ExErrorMagneticField* fMagField;   // pointer to the magnetic field 
  
  ExErrorDetectorMessenger* fDetectorMessenger;  // pointer to the Messenger
};

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#endif
