1 #ifndef __SELTRANS_H__
2 #define __SELTRANS_H__
4 /*
5 * Helper object for transforming selected items
6 *
7 * Author:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 * Carl Hetherington <inkscape@carlh.net>
10 *
11 * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
12 * Copyright (C) 1999-2002 Lauris Kaplinski
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include <sigc++/sigc++.h>
18 #include <libnr/nr-point.h>
19 #include <libnr/nr-matrix.h>
20 #include <libnr/nr-rect.h>
21 #include "knot.h"
22 #include "forward.h"
23 #include "selcue.h"
24 #include "message-context.h"
25 #include <vector>
27 struct SPKnot;
28 class SPDesktop;
29 class SPCanvasItem;
30 class SPSelTransHandle;
32 namespace Inkscape
33 {
35 namespace XML
36 {
37 class Node;
38 }
40 class SelTrans
41 {
42 public:
43 SelTrans(SPDesktop *desktop);
44 ~SelTrans();
46 Inkscape::MessageContext &messageContext() {
47 return _message_context;
48 }
50 void increaseState();
51 void resetState();
52 void setCenter(NR::Point const &p);
53 void grab(NR::Point const &p, gdouble x, gdouble y, bool show_handles);
54 void transform(NR::Matrix const &rel_affine, NR::Point const &norm);
55 void ungrab();
56 void stamp();
57 void moveTo(NR::Point const &xy, guint state);
58 void stretch(SPSelTransHandle const &handle, NR::Point &pt, guint state);
59 void scale(NR::Point &pt, guint state);
60 void skew(SPSelTransHandle const &handle, NR::Point &pt, guint state);
61 void rotate(NR::Point &pt, guint state);
62 gboolean scaleRequest(NR::Point &pt, guint state);
63 gboolean stretchRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state);
64 gboolean skewRequest(SPSelTransHandle const &handle, NR::Point &pt, guint state);
65 gboolean rotateRequest(NR::Point &pt, guint state);
66 gboolean centerRequest(NR::Point &pt, guint state);
68 gboolean handleRequest(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle);
69 void handleGrab(SPKnot *knot, guint state, SPSelTransHandle const &handle);
70 void handleClick(SPKnot *knot, guint state, SPSelTransHandle const &handle);
71 void handleNewEvent(SPKnot *knot, NR::Point *position, guint state, SPSelTransHandle const &handle);
73 enum Show
74 {
75 SHOW_CONTENT,
76 SHOW_OUTLINE
77 };
79 void setShow(Show s) {
80 _show = s;
81 }
82 bool isEmpty() {
83 return _empty;
84 }
85 bool isGrabbed() {
86 return _grabbed;
87 }
88 bool centerIsVisible() {
89 return ( _chandle && SP_KNOT_IS_VISIBLE (_chandle) );
90 }
92 private:
93 void _updateHandles();
94 void _updateVolatileState();
95 void _selChanged(Inkscape::Selection *selection);
96 void _selModified(Inkscape::Selection *selection, guint flags);
97 void _showHandles(SPKnot *knot[], SPSelTransHandle const handle[], gint num,
98 gchar const *even_tip, gchar const *odd_tip);
100 enum State {
101 STATE_SCALE,
102 STATE_ROTATE
103 };
105 SPDesktop *_desktop;
107 std::vector<std::pair<SPItem *, NR::Matrix> > _items;
108 std::vector<std::pair<SPItem *, NR::Point> > _items_centers;
110 std::vector<NR::Point> _snap_points;
111 std::vector<NR::Point> _bbox_points;
113 Inkscape::SelCue _selcue;
115 Inkscape::Selection *_selection;
116 State _state;
117 Show _show;
119 bool _grabbed;
120 bool _show_handles;
121 bool _empty;
122 bool _changed;
124 SPItem::BBoxType _snap_bbox_type;
126 NR::Maybe<NR::Rect> _bbox;
127 NR::Maybe<NR::Rect> _approximate_bbox;
128 gdouble _strokewidth;
129 NR::Matrix _current;
130 NR::Point _opposite; ///< opposite point to where a scale is taking place
132 NR::Point _opposite_for_specpoints;
133 NR::Point _opposite_for_bboxpoints;
134 NR::Point _origin_for_specpoints;
135 NR::Point _origin_for_bboxpoints;
137 NR::Maybe<NR::Point> _center;
138 bool _center_is_set; ///< we've already set _center, no need to reread it from items
140 SPKnot *_shandle[8];
141 SPKnot *_rhandle[8];
142 SPKnot *_chandle;
143 SPCanvasItem *_norm;
144 SPCanvasItem *_grip;
145 SPCanvasItem *_l[4];
146 guint _sel_changed_id;
147 guint _sel_modified_id;
148 GSList *_stamp_cache;
150 NR::Point _origin; ///< position of origin for transforms
151 NR::Point _point; ///< original position of the knot being used for the current transform
152 Inkscape::MessageContext _message_context;
153 SigC::Connection _sel_changed_connection;
154 SigC::Connection _sel_modified_connection;
155 };
157 }
159 #endif
162 /*
163 Local Variables:
164 mode:c++
165 c-file-style:"stroustrup"
166 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
167 indent-tabs-mode:nil
168 fill-column:99
169 End:
170 */
171 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :