//
// ********************************************************************
// * DISCLAIMER                                                       *
// *                                                                  *
// * The following disclaimer summarizes all the specific disclaimers *
// * of contributors to this software. The specific disclaimers,which *
// * govern, are listed with their locations in:                      *
// *   http://cern.ch/geant4/license                                  *
// *                                                                  *
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// *                                                                  *
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// * GEANT4 collaboration.                                            *
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//
//
// $Id: G4VRTScanner.hh,v 1.1 2003/09/18 11:14:03 johna Exp $
// GEANT4 tag $Name: geant4-07-00-cand-01 $
//
//

#ifndef G4VRTScanner_H
#define G4VRTScanner_H 1

// class description:
//
// G4VRTScanner
// Interface class for provider of a sequence of window coordinates.

#include "globals.hh"

class G4VRTScanner {

public: // with description

  virtual void Initialize(G4int nRow, G4int nColumn) = 0;
  // Intialises scanner for window with nRow rows and nColumn columns.

  virtual G4bool Coords(G4int& iRow, G4int& iColumn) = 0;
  // Supplies coordinate (iRow,iColumn) and returns false when the
  // sequence has finished, i.e., on the call *after* suplying the
  // last valid coordinate.

};

#endif