MapIterator.hh

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#ifndef MAP_ITER_HH
#define MAP_ITER_HH

#include <openmodeller/om_defs.hh>

// For pair
#include <utility>

#include <openmodeller/env_io/Header.hh>
class GeoTransform;

class dllexp MapIterator {

  friend dllexp bool operator == ( const MapIterator&, const MapIterator& );
  friend dllexp bool operator != ( const MapIterator&, const MapIterator& );

public:
  // Default constructor create a Terminal object which can be used in
  // while (miter != MapIterator() {} loops.
  MapIterator();

  MapIterator( const Header& h, GeoTransform* gt );

  // Compiler generated copy constructor, assignment operator and destructor
  // are ok.
  
  // returns the current position in geo coordinates.
  // first is x, second is y.
  std::pair<Coord,Coord> operator*() const;

  // prefix operator++
  MapIterator& operator++();

  // prefix operator--
  MapIterator& operator--();

  // postfix operator++
  MapIterator operator++( int );

  // postfix operator--
  MapIterator operator--( int );

  #ifdef MPI_FOUND
  //method added for the parallel version
  void nextblock(int init);
  #endif

private:
  bool isPastBounds() const;
  // If isTerminal is true, then this MapIterator object
  // represents the terminal condition.
  bool isTerminal;

  GeoTransform *gt;
  Header h;
  int xcur;
  int ycur;
};

#endif