#ifndef SEEN_LINE_SNAPPER_H #define SEEN_LINE_SNAPPER_H /** * \file src/line-snapper.h * \brief Superclass for snappers to horizontal and vertical lines. * * Authors: * Carl Hetherington <inkscape@carlh.net> * * Released under GNU GPL, read the file 'COPYING' for more information. */ #include "snapper.h" namespace Inkscape { class LineSnapper : public Snapper { public: LineSnapper(SPNamedView const *nv, NR::Coord const d); protected: typedef std::list<std::pair<NR::Point, NR::Point> > LineList; //first point is a vector normal to the line //second point is a point on the line private: void _doFreeSnap(SnappedConstraints &sc, Inkscape::Snapper::PointType const &t, NR::Point const &p, bool const &first_point, std::vector<NR::Point> &points_to_snap, std::list<SPItem const *> const &it) const; void _doConstrainedSnap(SnappedConstraints &sc, Inkscape::Snapper::PointType const &t, NR::Point const &p, bool const &first_point, std::vector<NR::Point> &points_to_snap, ConstraintLine const &c, std::list<SPItem const *> const &it) const; /** * \param p Point that we are trying to snap. * \return List of lines that we should try snapping to. */ virtual LineList _getSnapLines(NR::Point const &p) const = 0; 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; }; } #endif /* !SEEN_LINE_SNAPPER_H */