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diff --git a/src/snap.h b/src/snap.h
index 49c4987898dc8ee454404a4c40dfc7de718faf14..05af0d20281fcbc043f9c4c4435b90987b0b083c 100644 (file)
--- a/src/snap.h
+++ b/src/snap.h
/**
* \file snap.h
- * \brief Various snapping methods.
+ * \brief SnapManager class.
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Frank Felfe <innerspace@iname.com>
* Carl Hetherington <inkscape@carlh.net>
+ * Diederik van Lierop <mail@diedenrezi.nl>
*
+ * Copyright (C) 2006-2007 Johan Engelen <johan@shouraizou.nl>
* Copyright (C) 2000-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2008 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <libnr/nr-coord.h>
#include <libnr/nr-dim2.h>
#include <libnr/nr-forward.h>
-#include "grid-snapper.h"
+#include <libnr/nr-scale.h>
+
#include "guide-snapper.h"
#include "object-snapper.h"
+#include "snap-preferences.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:
- bool willSnapSomething() const;
+ SnapManager(SPNamedView const *v);
- Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
- NR::Point const &p,
- SPItem const *it) const;
+ typedef std::list<const Inkscape::Snapper*> SnapperList;
- Inkscape::SnappedPoint freeSnap(Inkscape::Snapper::PointType t,
- NR::Point const &p,
- std::list<SPItem const *> const &it) const;
+ bool someSnapperMightSnap() const;
- Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
- NR::Point const &p,
- NR::Point const &c,
- SPItem const *it) const;
+ void setup(SPDesktop const *desktop, bool snapindicator = true, SPItem const *item_to_ignore = NULL, std::vector<Geom::Point> *unselected_nodes = NULL);
+ void setup(SPDesktop const *desktop, bool snapindicator, std::vector<SPItem const *> &items_to_ignore, std::vector<Geom::Point> *unselected_nodes = NULL);
+
+ // freeSnapReturnByRef() is preferred over freeSnap(), because it only returns a
+ // point if snapping has occured (by overwriting p); otherwise p is untouched
+ void freeSnapReturnByRef(Inkscape::SnapPreferences::PointType point_type,
+ Geom::Point &p,
+ bool first_point = true,
+ Geom::OptRect const &bbox_to_snap = Geom::OptRect()) const;
- Inkscape::SnappedPoint constrainedSnap(Inkscape::Snapper::PointType t,
- NR::Point const &p,
- NR::Point 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,
- NR::Point const &c,
- std::list<SPItem const *> const &it,
- NR::Point const &tr) const;
-
- Inkscape::GridSnapper grid;
- Inkscape::GuideSnapper guide;
- Inkscape::ObjectSnapper object;
+ Inkscape::SnappedPoint freeSnap(Inkscape::SnapPreferences::PointType point_type,
+ Geom::Point const &p,
+ bool first_point = true,
+ Geom::OptRect const &bbox_to_snap = Geom::OptRect() ) const;
+
+ Geom::Point multipleOfGridPitch(Geom::Point const &t) const;
+
+ // constrainedSnapReturnByRef() is preferred over constrainedSnap(), because it only returns a
+ // point, by overwriting p, if snapping has occured; otherwise p is untouched
+ void constrainedSnapReturnByRef(Inkscape::SnapPreferences::PointType point_type,
+ Geom::Point &p,
+ Inkscape::Snapper::ConstraintLine const &constraint,
+ bool first_point = true,
+ Geom::OptRect const &bbox_to_snap = Geom::OptRect()) const;
+
+ Inkscape::SnappedPoint constrainedSnap(Inkscape::SnapPreferences::PointType point_type,
+ Geom::Point const &p,
+ Inkscape::Snapper::ConstraintLine const &constraint,
+ bool first_point = true,
+ Geom::OptRect const &bbox_to_snap = Geom::OptRect()) const;
+
+ void guideSnap(Geom::Point &p, Geom::Point const &guide_normal) const;
+
+ Inkscape::SnappedPoint freeSnapTranslation(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Geom::Point const &tr) const;
+
+ Inkscape::SnappedPoint constrainedSnapTranslation(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Inkscape::Snapper::ConstraintLine const &constraint,
+ Geom::Point const &tr) const;
+
+ Inkscape::SnappedPoint freeSnapScale(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Geom::Scale const &s,
+ Geom::Point const &o) const;
+
+ Inkscape::SnappedPoint constrainedSnapScale(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Geom::Scale const &s,
+ Geom::Point const &o) const;
+
+ Inkscape::SnappedPoint constrainedSnapStretch(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Geom::Coord const &s,
+ Geom::Point const &o,
+ Geom::Dim2 d,
+ bool uniform) const;
+
+ Inkscape::SnappedPoint constrainedSnapSkew(Inkscape::SnapPreferences::PointType point_type,
+ std::vector<Geom::Point> const &p,
+ Geom::Point const &pointer,
+ Inkscape::Snapper::ConstraintLine const &constraint,
+ Geom::Point const &s, // s[0] = skew factor, s[1] = scale factor
+ Geom::Point const &o,
+ Geom::Dim2 d) const;
+
+ Inkscape::GuideSnapper guide; ///< guide snapper
+ Inkscape::ObjectSnapper object; ///< snapper to other objects
+ Inkscape::SnapPreferences snapprefs;
- typedef std::list<const Inkscape::Snapper*> SnapperList;
SnapperList getSnappers() const;
+ SnapperList getGridSnappers() const;
+
+ SPDesktop const *getDesktop() const {return _desktop;}
+ SPNamedView const *getNamedView() const {return _named_view;}
+ SPDocument *getDocument() const;
+
+protected:
+ SPNamedView const *_named_view;
+
+private:
+ enum Transformation {
+ TRANSLATION,
+ SCALE,
+ STRETCH,
+ SKEW
+ };
+
+ std::vector<SPItem const *> *_items_to_ignore;
+ SPItem const *_item_to_ignore;
+ SPDesktop const *_desktop;
+ bool _snapindicator;
+ std::vector<Geom::Point> *_unselected_nodes;
+
+ Inkscape::SnappedPoint _snapTransformed(Inkscape::SnapPreferences::PointType type,
+ std::vector<Geom::Point> const &points,
+ Geom::Point const &pointer,
+ bool constrained,
+ Inkscape::Snapper::ConstraintLine const &constraint,
+ Transformation transformation_type,
+ Geom::Point const &transformation,
+ Geom::Point const &origin,
+ Geom::Dim2 dim,
+ bool uniform) const;
+
+ Inkscape::SnappedPoint findBestSnap(Geom::Point const &p, SnappedConstraints &sc, bool constrained) const;
};
-
-/* Single point methods */
-NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
- NR::Point const &d, std::list<SPItem const *> const &it);
-NR::Coord namedview_vector_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point &req,
- NR::Point const &d, SPItem const *it);
-NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
- NR::Dim2 const dim, SPItem const *it);
-NR::Coord namedview_dim_snap(SPNamedView const *nv, Inkscape::Snapper::PointType t, NR::Point& req,
- NR::Dim2 const dim, std::list<SPItem const *> const &it);
-
-/* List of points methods */
-
-std::pair<double, bool> namedview_vector_snap_list(SPNamedView const *nv,
- Inkscape::Snapper::PointType t, const std::vector<NR::Point> &p,
- NR::Point const &norm, NR::scale const &s,
- std::list<SPItem const *> const &it
- );
-
-std::pair<double, bool> namedview_dim_snap_list_scale(SPNamedView const *nv,
- Inkscape::Snapper::PointType t, const std::vector<NR::Point> &p,
- NR::Point const &norm, double const sx,
- NR::Dim2 const dim,
- std::list<SPItem const *> const &it);
-
-NR::Coord namedview_dim_snap_list_skew(SPNamedView const *nv, Inkscape::Snapper::PointType t,
- const std::vector<NR::Point> &p,
- NR::Point const &norm, double const sx, NR::Dim2 const dim);
-
-
#endif /* !SEEN_SNAP_H */
/*