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#ifndef SEEN_SNAP_H
#define SEEN_SNAP_H
/**
* \file snap.h
* \brief SnapManager class.
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Frank Felfe <innerspace@iname.com>
* Carl Hetherington <inkscape@carlh.net>
*
* Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
* Copyright (C) 2000-2002 Lauris Kaplinski
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <vector>
#include <libnr/nr-coord.h>
#include <libnr/nr-dim2.h>
#include <libnr/nr-forward.h>
#include <libnr/nr-scale.h>
#include "grid-snapper.h"
#include "guide-snapper.h"
#include "object-snapper.h"
class SPNamedView;
/// Class to coordinate snapping operations
/**
* Each SPNamedView has one of these. It offers methods to snap points to whatever
* snappers are defined (e.g. grid, guides etc.). It also allows callers to snap
* points which have undergone some transformation (e.g. translation, scaling etc.)
*/
class SnapManager
{
public:
SnapManager(SPNamedView const *v);
bool willSnapSomething() const;
Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
NR::Point const &p,
SPItem const *it) const;
Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
NR::Point const &p,
std::list<SPItem const *> const &it) const;
Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
NR::Point const &p,
Inkscape::Snapper::ConstraintLine const &c,
SPItem const *it) const;
Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
NR::Point const &p,
Inkscape::Snapper::ConstraintLine const &c,
std::list<SPItem const *> const &it) const;
std::pair<NR::Point, bool> freeSnapTranslation(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
NR::Point const &tr) const;
std::pair<NR::Point, bool> constrainedSnapTranslation(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
Inkscape::Snapper::ConstraintLine const &c,
NR::Point const &tr) const;
std::pair<NR::scale, bool> freeSnapScale(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
NR::scale const &s,
NR::Point const &o) const;
std::pair<NR::scale, bool> constrainedSnapScale(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
Inkscape::Snapper::ConstraintLine const &c,
NR::scale const &s,
NR::Point const &o) const;
std::pair<NR::Coord, bool> freeSnapStretch(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
NR::Coord const &s,
NR::Point const &o,
NR::Dim2 d,
bool uniform) const;
std::pair<NR::Coord, bool> freeSnapSkew(Inkscape::Snapper::PointType t,
std::vector<NR::Point> const &p,
std::list<SPItem const *> const &it,
NR::Coord const &s,
NR::Point const &o,
NR::Dim2 d) const;
Inkscape::GridSnapper grid; ///< grid snapper
Inkscape::AxonomGridSnapper axonomgrid; ///< axonometricgrid snapper
Inkscape::GuideSnapper guide; ///< guide snapper
Inkscape::ObjectSnapper object; ///< snapper to other objects
typedef std::list<const Inkscape::Snapper*> SnapperList;
SnapperList getSnappers() const;
SnapperList gridSnappers; ///< List of grid snappers to enable multiple grids
protected:
SPNamedView const *_named_view;
private:
enum Transformation {
TRANSLATION,
SCALE,
STRETCH,
SKEW
};
std::pair<NR::Point, bool> _snapTransformed(Inkscape::Snapper::PointType type,
std::vector<NR::Point> const &points,
std::list<SPItem const *> const &ignore,
bool constrained,
Inkscape::Snapper::ConstraintLine const &constraint,
Transformation transformation_type,
NR::Point const &transformation,
NR::Point const &origin,
NR::Dim2 dim,
bool uniform) const;
};
#endif /* !SEEN_SNAP_H */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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