src/line-snapper.h

   1 #ifndef SEEN_LINE_SNAPPER_H
   2 #define SEEN_LINE_SNAPPER_H
   3
   4 /**
   5  *    \file src/line-snapper.h
   6  *    \brief Superclass for snappers to horizontal and vertical lines.
   7  *
   8  *    Authors:
   9  *      Carl Hetherington <inkscape@carlh.net>
  10  *
  11  *    Released under GNU GPL, read the file 'COPYING' for more information.
  12  */
  13
  14 #include "snapper.h"
  15
  16 namespace Inkscape
  17 {
  18
  19 class LineSnapper : public Snapper
  20 {
  21 public:
  22   LineSnapper(SPNamedView const *nv, NR::Coord const d);
  23
  24 protected:
  25   typedef std::list<std::pair<NR::Dim2, NR::Coord> > LineList;
  26
  27 private:
  28   SnappedPoint _doFreeSnap(Inkscape::Snapper::PointType const &t,
  29                                         NR::Point const &p,
  30                                         bool const &first_point,
  31                     std::vector<NR::Point> &points_to_snap,
  32                     std::list<SPItem const *> const &it) const;
  33
  34   SnappedPoint _doConstrainedSnap(Inkscape::Snapper::PointType const &t,
  35                                         NR::Point const &p,
  36                                         bool const &first_point,
  37                     std::vector<NR::Point> &points_to_snap,
  38                     ConstraintLine const &c,
  39                                         std::list<SPItem const *> const &it) const;
  40
  41   /**
  42    *  \param p Point that we are trying to snap.
  43    *  \return List of lines that we should try snapping to.
  44    */
  45   virtual LineList _getSnapLines(NR::Point const &p) const = 0;
  46 };
  47
  48 }
  49
  50 #endif /* !SEEN_LINE_SNAPPER_H */