1 #ifndef SEEN_LINE_SNAPPER_H
2 #define SEEN_LINE_SNAPPER_H
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 */
14 #include "snapper.h"
16 namespace Inkscape
17 {
19 class LineSnapper : public Snapper
20 {
21 public:
22 LineSnapper(SPNamedView const *nv, NR::Coord const d);
24 protected:
25 typedef std::list<std::pair<NR::Dim2, NR::Coord> > LineList;
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;
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;
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 };
48 }
50 #endif /* !SEEN_LINE_SNAPPER_H */