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#ifndef F04FocusSolenoid_h
#define F04FocusSolenoid_h 1

#include "G4LogicalVolume.hh"

#include "F04SimpleSolenoid.hh"

//  F04FocusSolenoid implements a solenoid magnet with an increased 
//  cylindrical magnetic field in +/- z-direction (or half focusing)

class F04FocusSolenoid : public F04SimpleSolenoid
{
  public:

    ///  Default constructor.
    F04FocusSolenoid(G4double, G4double, G4double,
                            G4LogicalVolume*, G4ThreeVector);

    ///  Destructor.
    virtual ~F04FocusSolenoid() {}

    ///  Set F04FocusSolenoid to only half-focusing (default negative z)
    void SetHalf(G4bool h) { Half = h; }

    ///  addFieldValue() adds the field for this solenoid into field[].
    ///  point[] is in global coordinates.
    void addFieldValue(const G4double point[4], G4double field[6]) const;

  private:

  G4bool Half;

  G4double B1;
  G4double B2;

};

#endif