1 /** \file
2 * Provides a class that shows a temporary indicator on the canvas of where the snap was, and what kind of snap
3 *
4 * Authors:
5 * Johan Engelen
6 * Diederik van Lierop
7 *
8 * Copyright (C) Johan Engelen 2009 <j.b.c.engelen@utwente.nl>
9 * Copyright (C) Diederik van Lierop 2010 <mail@diedenrezi.nl>
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include "display/snap-indicator.h"
16 #include "desktop.h"
17 #include "desktop-handles.h"
18 #include "display/sodipodi-ctrl.h"
19 #include "display/sodipodi-ctrlrect.h"
20 #include "display/canvas-text.h"
21 #include "display/sp-canvas-util.h"
22 #include "knot.h"
23 #include "preferences.h"
24 #include <glibmm/i18n.h>
26 namespace Inkscape {
27 namespace Display {
29 SnapIndicator::SnapIndicator(SPDesktop * desktop)
30 : _snaptarget(NULL),
31 _snaptarget_tooltip(NULL),
32 _snaptarget_bbox(NULL),
33 _snapsource(NULL),
34 _snaptarget_is_presnap(false),
35 _desktop(desktop)
36 {
37 }
39 SnapIndicator::~SnapIndicator()
40 {
41 // remove item that might be present
42 remove_snaptarget();
43 remove_snapsource();
44 }
46 void
47 SnapIndicator::set_new_snaptarget(Inkscape::SnappedPoint const &p, bool pre_snap)
48 {
49 remove_snaptarget(); //only display one snaptarget at a time
51 g_assert(_desktop != NULL);
53 if (!p.getSnapped()) {
54 g_warning("No snapping took place, so no snap target will be displayed");
55 return; // If we haven't snapped, then it is of no use to draw a snapindicator
56 }
58 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
59 bool value = prefs->getBool("/options/snapindicator/value", true);
61 if (value) {
62 // TRANSLATORS: undefined target for snapping
63 gchar *target_name = _("UNDEFINED");
64 switch (p.getTarget()) {
65 case SNAPTARGET_UNDEFINED:
66 target_name = _("UNDEFINED");
67 break;
68 case SNAPTARGET_GRID:
69 target_name = _("grid line");
70 break;
71 case SNAPTARGET_GRID_INTERSECTION:
72 target_name = _("grid intersection");
73 break;
74 case SNAPTARGET_GUIDE:
75 target_name = _("guide");
76 break;
77 case SNAPTARGET_GUIDE_INTERSECTION:
78 target_name = _("guide intersection");
79 break;
80 case SNAPTARGET_GUIDE_ORIGIN:
81 target_name = _("guide origin");
82 break;
83 case SNAPTARGET_GRID_GUIDE_INTERSECTION:
84 target_name = _("grid-guide intersection");
85 break;
86 case SNAPTARGET_NODE_CUSP:
87 target_name = _("cusp node");
88 break;
89 case SNAPTARGET_NODE_SMOOTH:
90 target_name = _("smooth node");
91 break;
92 case SNAPTARGET_PATH:
93 target_name = _("path");
94 break;
95 case SNAPTARGET_PATH_INTERSECTION:
96 target_name = _("path intersection");
97 break;
98 case SNAPTARGET_BBOX_CORNER:
99 target_name = _("bounding box corner");
100 break;
101 case SNAPTARGET_BBOX_EDGE:
102 target_name = _("bounding box side");
103 break;
104 case SNAPTARGET_PAGE_BORDER:
105 target_name = _("page border");
106 break;
107 case SNAPTARGET_LINE_MIDPOINT:
108 target_name = _("line midpoint");
109 break;
110 case SNAPTARGET_OBJECT_MIDPOINT:
111 target_name = _("object midpoint");
112 break;
113 case SNAPTARGET_ROTATION_CENTER:
114 target_name = _("object rotation center");
115 break;
116 case SNAPTARGET_HANDLE:
117 target_name = _("handle");
118 break;
119 case SNAPTARGET_BBOX_EDGE_MIDPOINT:
120 target_name = _("bounding box side midpoint");
121 break;
122 case SNAPTARGET_BBOX_MIDPOINT:
123 target_name = _("bounding box midpoint");
124 break;
125 case SNAPTARGET_PAGE_CORNER:
126 target_name = _("page corner");
127 break;
128 case SNAPTARGET_CONVEX_HULL_CORNER:
129 target_name = _("convex hull corner");
130 break;
131 case SNAPTARGET_ELLIPSE_QUADRANT_POINT:
132 target_name = _("quadrant point");
133 break;
134 case SNAPTARGET_CENTER:
135 target_name = _("center");
136 break;
137 case SNAPTARGET_CORNER:
138 target_name = _("corner");
139 break;
140 case SNAPTARGET_TEXT_BASELINE:
141 target_name = _("text baseline");
142 break;
143 case SNAPTARGET_CONSTRAINED_ANGLE:
144 target_name = _("constrained angle");
145 break;
146 default:
147 g_warning("Snap target has not yet been defined!");
148 break;
149 }
151 gchar *source_name = _("UNDEFINED");
152 switch (p.getSource()) {
153 case SNAPSOURCE_UNDEFINED:
154 source_name = _("UNDEFINED");
155 break;
156 case SNAPSOURCE_BBOX_CORNER:
157 source_name = _("Bounding box corner");
158 break;
159 case SNAPSOURCE_BBOX_MIDPOINT:
160 source_name = _("Bounding box midpoint");
161 break;
162 case SNAPSOURCE_BBOX_EDGE_MIDPOINT:
163 source_name = _("Bounding box side midpoint");
164 break;
165 case SNAPSOURCE_NODE_SMOOTH:
166 source_name = _("Smooth node");
167 break;
168 case SNAPSOURCE_NODE_CUSP:
169 source_name = _("Cusp node");
170 break;
171 case SNAPSOURCE_LINE_MIDPOINT:
172 source_name = _("Line midpoint");
173 break;
174 case SNAPSOURCE_OBJECT_MIDPOINT:
175 source_name = _("Object midpoint");
176 break;
177 case SNAPSOURCE_ROTATION_CENTER:
178 source_name = _("Object rotation center");
179 break;
180 case SNAPSOURCE_NODE_HANDLE:
181 case SNAPSOURCE_OTHER_HANDLE:
182 source_name = _("Handle");
183 break;
184 case SNAPSOURCE_PATH_INTERSECTION:
185 source_name = _("Path intersection");
186 break;
187 case SNAPSOURCE_GUIDE:
188 source_name = _("Guide");
189 break;
190 case SNAPSOURCE_GUIDE_ORIGIN:
191 source_name = _("Guide origin");
192 break;
193 case SNAPSOURCE_CONVEX_HULL_CORNER:
194 source_name = _("Convex hull corner");
195 break;
196 case SNAPSOURCE_ELLIPSE_QUADRANT_POINT:
197 source_name = _("Quadrant point");
198 break;
199 case SNAPSOURCE_CENTER:
200 source_name = _("Center");
201 break;
202 case SNAPSOURCE_CORNER:
203 source_name = _("Corner");
204 break;
205 case SNAPSOURCE_TEXT_BASELINE:
206 source_name = _("Text baseline");
207 break;
208 default:
209 g_warning("Snap source has not yet been defined!");
210 break;
211 }
212 //std::cout << "Snapped " << source_name << " to " << target_name << std::endl;
214 remove_snapsource(); // Don't set both the source and target indicators, as these will overlap
216 // Display the snap indicator (i.e. the cross)
217 SPCanvasItem * canvasitem = NULL;
218 if (p.getTarget() == SNAPTARGET_NODE_SMOOTH || p.getTarget() == SNAPTARGET_NODE_CUSP) {
219 canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
220 SP_TYPE_CTRL,
221 "anchor", GTK_ANCHOR_CENTER,
222 "size", 10.0,
223 "stroked", TRUE,
224 "stroke_color", pre_snap ? 0x7f7f7fff : 0xff0000ff,
225 "mode", SP_KNOT_MODE_XOR,
226 "shape", SP_KNOT_SHAPE_DIAMOND,
227 NULL );
228 } else {
229 canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
230 SP_TYPE_CTRL,
231 "anchor", GTK_ANCHOR_CENTER,
232 "size", 10.0,
233 "stroked", TRUE,
234 "stroke_color", pre_snap ? 0x7f7f7fff : 0xff0000ff,
235 "mode", SP_KNOT_MODE_XOR,
236 "shape", SP_KNOT_SHAPE_CROSS,
237 NULL );
238 }
240 const int timeout_val = 1200; // TODO add preference for snap indicator timeout?
242 SP_CTRL(canvasitem)->moveto(p.getPoint());
243 _snaptarget = _desktop->add_temporary_canvasitem(canvasitem, timeout_val);
244 _snaptarget_is_presnap = pre_snap;
246 // Display the tooltip, which reveals the type of snap source and the type of snap target
247 gchar *tooltip_str = g_strconcat(source_name, _(" to "), target_name, NULL);
248 Geom::Point tooltip_pos = p.getPoint() + _desktop->w2d(Geom::Point(15, -15));
250 SPCanvasItem *canvas_tooltip = sp_canvastext_new(sp_desktop_tempgroup(_desktop), _desktop, tooltip_pos, tooltip_str);
251 if (pre_snap) {
252 SP_CANVASTEXT(canvas_tooltip)->rgba = 0x7f7f7fff;
253 }
254 g_free(tooltip_str);
256 sp_canvastext_set_anchor((SPCanvasText* )canvas_tooltip, -1, 1);
257 _snaptarget_tooltip = _desktop->add_temporary_canvasitem(canvas_tooltip, timeout_val);
259 // Display the bounding box, if we snapped to one
260 Geom::OptRect const bbox = p.getTargetBBox();
261 if (bbox) {
262 SPCanvasItem* box = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
263 SP_TYPE_CTRLRECT,
264 NULL);
266 SP_CTRLRECT(box)->setRectangle(*bbox);
267 SP_CTRLRECT(box)->setColor(pre_snap ? 0x7f7f7fff : 0xff0000ff, 0, 0);
268 SP_CTRLRECT(box)->setDashed(true);
269 sp_canvas_item_move_to_z(box, 0);
270 _snaptarget_bbox = _desktop->add_temporary_canvasitem(box, timeout_val);
271 }
272 }
273 }
275 void
276 SnapIndicator::remove_snaptarget(bool only_if_presnap)
277 {
278 if (only_if_presnap && !_snaptarget_is_presnap) {
279 return;
280 }
282 if (_snaptarget) {
283 _desktop->remove_temporary_canvasitem(_snaptarget);
284 _snaptarget = NULL;
285 _snaptarget_is_presnap = false;
286 }
288 if (_snaptarget_tooltip) {
289 _desktop->remove_temporary_canvasitem(_snaptarget_tooltip);
290 _snaptarget_tooltip = NULL;
291 }
293 if (_snaptarget_bbox) {
294 _desktop->remove_temporary_canvasitem(_snaptarget_bbox);
295 _snaptarget_bbox = NULL;
296 }
298 }
300 void
301 SnapIndicator::set_new_snapsource(Inkscape::SnapCandidatePoint const &p)
302 {
303 remove_snapsource();
305 g_assert(_desktop != NULL);
307 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
308 bool value = prefs->getBool("/options/snapindicator/value", true);
310 if (value) {
311 SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (_desktop),
312 SP_TYPE_CTRL,
313 "anchor", GTK_ANCHOR_CENTER,
314 "size", 6.0,
315 "stroked", TRUE,
316 "stroke_color", 0xff0000ff,
317 "mode", SP_KNOT_MODE_XOR,
318 "shape", SP_KNOT_SHAPE_CIRCLE,
319 NULL );
321 SP_CTRL(canvasitem)->moveto(p.getPoint());
322 _snapsource = _desktop->add_temporary_canvasitem(canvasitem, 1000);
323 }
324 }
326 void
327 SnapIndicator::remove_snapsource()
328 {
329 if (_snapsource) {
330 _desktop->remove_temporary_canvasitem(_snapsource);
331 _snapsource = NULL;
332 }
333 }
335 } //namespace Display
336 } /* namespace Inkscape */
339 /*
340 Local Variables:
341 mode:c++
342 c-file-style:"stroustrup"
343 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
344 indent-tabs-mode:nil
345 fill-column:99
346 End:
347 */
348 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 :