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