f6b467520e718016a01cbde04e03ec144f203b48
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 std::list<SPItem const *> const &it) const;
32 SnappedPoint _doConstrainedSnap(Inkscape::Snapper::PointType const &t,
33 NR::Point const &p,
34 ConstraintLine const &c,
35 std::list<SPItem const *> const &it) const;
37 /**
38 * \param p Point that we are trying to snap.
39 * \return List of lines that we should try snapping to.
40 */
41 virtual LineList _getSnapLines(NR::Point const &p) const = 0;
42 };
44 }
46 #endif /* !SEEN_LINE_SNAPPER_H */