8c307da53be9fdd7ba77dc1387fdaa9967cf0963
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 void _doFreeSnap(SnappedConstraints &sc,
29 Inkscape::Snapper::PointType const &t,
30 NR::Point const &p,
31 bool const &first_point,
32 std::vector<NR::Point> &points_to_snap,
33 std::list<SPItem const *> const &it) const;
35 void _doConstrainedSnap(SnappedConstraints &sc,
36 Inkscape::Snapper::PointType const &t,
37 NR::Point const &p,
38 bool const &first_point,
39 std::vector<NR::Point> &points_to_snap,
40 ConstraintLine const &c,
41 std::list<SPItem const *> const &it) const;
43 /**
44 * \param p Point that we are trying to snap.
45 * \return List of lines that we should try snapping to.
46 */
47 virtual LineList _getSnapLines(NR::Point const &p) const = 0;
49 virtual void _addSnappedLine(SnappedConstraints &sc, NR::Point const snapped_point, NR::Coord const snapped_distance, NR::Point const normal_to_line, NR::Point const point_on_line) const = 0;
50 };
52 }
54 #endif /* !SEEN_LINE_SNAPPER_H */