1 #ifndef SEEN_OBJECT_SNAPPER_H
2 #define SEEN_OBJECT_SNAPPER_H
4 /**
5 * \file object-snapper.h
6 * \brief Snapping things to objects.
7 *
8 * Authors:
9 * Carl Hetherington <inkscape@carlh.net>
10 *
11 * Copyright (C) 2005 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "snapper.h"
17 #include "sp-path.h"
18 #include "splivarot.h"
20 struct SPNamedView;
21 struct SPItem;
22 struct SPObject;
24 namespace Inkscape
25 {
27 class ObjectSnapper : public Snapper
28 {
30 public:
31 ObjectSnapper(SPNamedView const *nv, NR::Coord const d);
32 ~ObjectSnapper();
34 enum DimensionToSnap {SNAP_X, SNAP_Y, SNAP_XY};
36 void setSnapToItemNode(bool s) {
37 _snap_to_itemnode = s;
38 }
40 bool getSnapToItemNode() const {
41 return _snap_to_itemnode;
42 }
44 void setSnapToItemPath(bool s) {
45 _snap_to_itempath = s;
46 }
48 bool getSnapToItemPath() const {
49 return _snap_to_itempath;
50 }
52 void setSnapToBBoxNode(bool s) {
53 _snap_to_bboxnode = s;
54 }
56 bool getSnapToBBoxNode() const {
57 return _snap_to_bboxnode;
58 }
60 void setSnapToBBoxPath(bool s) {
61 _snap_to_bboxpath = s;
62 }
64 bool getSnapToBBoxPath() const {
65 return _snap_to_bboxpath;
66 }
68 void setIncludeItemCenter(bool s) {
69 _include_item_center = s;
70 }
72 bool getIncludeItemCenter() const {
73 return _include_item_center;
74 }
76 void setStrictSnapping(bool enabled) {
77 _strict_snapping = enabled;
78 }
80 void guideSnap(SnappedConstraints &sc,
81 NR::Point const &p,
82 DimensionToSnap const snap_dim) const;
84 bool ThisSnapperMightSnap() const;
86 private:
87 //store some lists of candidates, points and paths, so we don't have to rebuild them for each point we want to snap
88 std::vector<SPItem*> *_candidates;
89 std::vector<NR::Point> *_points_to_snap_to;
90 std::vector<Path*> *_paths_to_snap_to;
91 void _doFreeSnap(SnappedConstraints &sc,
92 Inkscape::Snapper::PointType const &t,
93 NR::Point const &p,
94 bool const &first_point,
95 std::vector<NR::Point> &points_to_snap,
96 std::list<SPItem const *> const &it) const;
98 void _doConstrainedSnap(SnappedConstraints &sc,
99 Inkscape::Snapper::PointType const &t,
100 NR::Point const &p,
101 bool const &first_point,
102 std::vector<NR::Point> &points_to_snap,
103 ConstraintLine const &c,
104 std::list<SPItem const *> const &it) const;
106 void _findCandidates(SPObject* r,
107 std::list<SPItem const *> const &it,
108 bool const &first_point,
109 std::vector<NR::Point> &points_to_snap,
110 DimensionToSnap const snap_dim) const;
112 void _snapNodes(SnappedConstraints &sc,
113 Inkscape::Snapper::PointType const &t,
114 NR::Point const &p,
115 bool const &first_point,
116 DimensionToSnap const snap_dim) const;
118 void _snapPaths(SnappedConstraints &sc,
119 Inkscape::Snapper::PointType const &t,
120 NR::Point const &p,
121 bool const &first_point) const;
123 bool _snap_to_itemnode;
124 bool _snap_to_itempath;
125 bool _snap_to_bboxnode;
126 bool _snap_to_bboxpath;
128 //If enabled, then bbox corners will only snap to bboxes,
129 //and nodes will only snap to nodes and paths. We will not
130 //snap bbox corners to nodes, or nodes to bboxes.
131 //(snapping to grids and guides is not affected by this)
132 bool _strict_snapping;
133 bool _include_item_center;
134 };
136 }
138 #endif