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#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);
void freeSnap(SnappedConstraints &sc,
Inkscape::Snapper::PointType const &t,
NR::Point const &p,
bool const &first_point,
boost::optional<NR::Rect> const &bbox_to_snap,
std::vector<SPItem const *> const *it,
std::vector<NR::Point> *unselected_nodes) const;
void constrainedSnap(SnappedConstraints &sc,
Inkscape::Snapper::PointType const &t,
NR::Point const &p,
bool const &first_point,
boost::optional<NR::Rect> const &bbox_to_snap,
ConstraintLine const &c,
std::vector<SPItem const *> const *it) const;
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:
/**
* \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 */
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