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 * Diederik van Lierop <mail@diedenrezi.nl>
11 *
12 * Copyright (C) 2005 - 2007 Authors
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include "snapper.h"
18 #include "sp-path.h"
19 #include "splivarot.h"
21 struct SPNamedView;
22 struct SPItem;
23 struct SPObject;
25 namespace Inkscape
26 {
28 class ObjectSnapper : public Snapper
29 {
31 public:
32 ObjectSnapper(SPNamedView const *nv, NR::Coord const d);
33 ~ObjectSnapper();
35 enum DimensionToSnap {
36 GUIDE_TRANSL_SNAP_X, // For snapping a vertical guide (normal in the X-direction) to objects,
37 GUIDE_TRANSL_SNAP_Y, // For snapping a horizontal guide (normal in the Y-direction) to objects
38 ANGLED_GUIDE_TRANSL_SNAP, // For snapping an angled guide, while translating it accross the desktop
39 ANGLED_GUIDE_ROT_SNAP, // For snapping an angled guide, while rotating it around some pivot point
40 TRANSL_SNAP_XY}; // All other cases; for snapping to objects, other than guides
42 void setSnapToItemNode(bool s) {
43 _snap_to_itemnode = s;
44 }
46 bool getSnapToItemNode() const {
47 return _snap_to_itemnode;
48 }
50 void setSnapToItemPath(bool s) {
51 _snap_to_itempath = s;
52 }
54 bool getSnapToItemPath() const {
55 return _snap_to_itempath;
56 }
58 void setSnapToBBoxNode(bool s) {
59 _snap_to_bboxnode = s;
60 }
62 bool getSnapToBBoxNode() const {
63 return _snap_to_bboxnode;
64 }
66 void setSnapToBBoxPath(bool s) {
67 _snap_to_bboxpath = s;
68 }
70 bool getSnapToBBoxPath() const {
71 return _snap_to_bboxpath;
72 }
74 void setIncludeItemCenter(bool s) {
75 _include_item_center = s;
76 }
78 bool getIncludeItemCenter() const {
79 return _include_item_center;
80 }
82 void setStrictSnapping(bool enabled) {
83 _strict_snapping = enabled;
84 }
86 void guideSnap(SnappedConstraints &sc,
87 NR::Point const &p,
88 NR::Point const &guide_normal) const;
90 bool ThisSnapperMightSnap() const;
92 private:
93 //store some lists of candidates, points and paths, so we don't have to rebuild them for each point we want to snap
94 std::vector<SPItem*> *_candidates;
95 std::vector<NR::Point> *_points_to_snap_to;
96 std::vector<NArtBpath*> *_bpaths_to_snap_to;
97 std::vector<Path*> *_paths_to_snap_to;
98 void _doFreeSnap(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 std::list<SPItem const *> const &it) const;
105 void _doConstrainedSnap(SnappedConstraints &sc,
106 Inkscape::Snapper::PointType const &t,
107 NR::Point const &p,
108 bool const &first_point,
109 std::vector<NR::Point> &points_to_snap,
110 ConstraintLine const &c,
111 std::list<SPItem const *> const &it) const;
113 void _findCandidates(SPObject* r,
114 std::list<SPItem const *> const &it,
115 bool const &first_point,
116 std::vector<NR::Point> &points_to_snap,
117 DimensionToSnap const snap_dim) const;
119 void _snapNodes(SnappedConstraints &sc,
120 Inkscape::Snapper::PointType const &t,
121 NR::Point const &p,
122 bool const &first_point) const;
124 void _snapTranslatingGuideToNodes(SnappedConstraints &sc,
125 Inkscape::Snapper::PointType const &t,
126 NR::Point const &p,
127 NR::Point const &guide_normal) const;
129 void _collectNodes(Inkscape::Snapper::PointType const &t,
130 bool const &first_point) const;
132 void _snapPaths(SnappedConstraints &sc,
133 Inkscape::Snapper::PointType const &t,
134 NR::Point const &p,
135 bool const &first_point) const;
137 void _snapPathsConstrained(SnappedConstraints &sc,
138 Inkscape::Snapper::PointType const &t,
139 NR::Point const &p,
140 bool const &first_point,
141 ConstraintLine const &c) const;
143 void _collectPaths(Inkscape::Snapper::PointType const &t,
144 bool const &first_point) const;
145 void _clear_paths() const;
147 bool _snap_to_itemnode;
148 bool _snap_to_itempath;
149 bool _snap_to_bboxnode;
150 bool _snap_to_bboxpath;
152 //If enabled, then bbox corners will only snap to bboxes,
153 //and nodes will only snap to nodes and paths. We will not
154 //snap bbox corners to nodes, or nodes to bboxes.
155 //(snapping to grids and guides is not affected by this)
156 bool _strict_snapping;
157 bool _include_item_center;
158 };
160 }
162 #endif