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 case SNAPTARGET_CONSTRAINT:
147 target_name = _("constraint");
148 break;
149 default:
150 g_warning("Snap target has not yet been defined!");
151 break;
152 }
154 gchar *source_name = _("UNDEFINED");
155 switch (p.getSource()) {
156 case SNAPSOURCE_UNDEFINED:
157 source_name = _("UNDEFINED");
158 break;
159 case SNAPSOURCE_BBOX_CORNER:
160 source_name = _("Bounding box corner");
161 break;
162 case SNAPSOURCE_BBOX_MIDPOINT:
163 source_name = _("Bounding box midpoint");
164 break;
165 case SNAPSOURCE_BBOX_EDGE_MIDPOINT:
166 source_name = _("Bounding box side midpoint");
167 break;
168 case SNAPSOURCE_NODE_SMOOTH:
169 source_name = _("Smooth node");
170 break;
171 case SNAPSOURCE_NODE_CUSP:
172 source_name = _("Cusp node");
173 break;
174 case SNAPSOURCE_LINE_MIDPOINT:
175 source_name = _("Line midpoint");
176 break;
177 case SNAPSOURCE_OBJECT_MIDPOINT:
178 source_name = _("Object midpoint");
179 break;
180 case SNAPSOURCE_ROTATION_CENTER:
181 source_name = _("Object rotation center");
182 break;
183 case SNAPSOURCE_NODE_HANDLE:
184 case SNAPSOURCE_OTHER_HANDLE:
185 source_name = _("Handle");
186 break;
187 case SNAPSOURCE_PATH_INTERSECTION:
188 source_name = _("Path intersection");
189 break;
190 case SNAPSOURCE_GUIDE:
191 source_name = _("Guide");
192 break;
193 case SNAPSOURCE_GUIDE_ORIGIN:
194 source_name = _("Guide origin");
195 break;
196 case SNAPSOURCE_CONVEX_HULL_CORNER:
197 source_name = _("Convex hull corner");
198 break;
199 case SNAPSOURCE_ELLIPSE_QUADRANT_POINT:
200 source_name = _("Quadrant point");
201 break;
202 case SNAPSOURCE_CENTER:
203 source_name = _("Center");
204 break;
205 case SNAPSOURCE_CORNER:
206 source_name = _("Corner");
207 break;
208 case SNAPSOURCE_TEXT_BASELINE:
209 source_name = _("Text baseline");
210 break;
211 default:
212 g_warning("Snap source has not yet been defined!");
213 break;
214 }
215 //std::cout << "Snapped " << source_name << " to " << target_name << std::endl;
217 remove_snapsource(); // Don't set both the source and target indicators, as these will overlap
219 // Display the snap indicator (i.e. the cross)
220 SPCanvasItem * canvasitem = NULL;
221 if (p.getTarget() == SNAPTARGET_NODE_SMOOTH || p.getTarget() == SNAPTARGET_NODE_CUSP) {
222 canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
223 SP_TYPE_CTRL,
224 "anchor", GTK_ANCHOR_CENTER,
225 "size", 10.0,
226 "stroked", TRUE,
227 "stroke_color", pre_snap ? 0x7f7f7fff : 0xff0000ff,
228 "mode", SP_KNOT_MODE_XOR,
229 "shape", SP_KNOT_SHAPE_DIAMOND,
230 NULL );
231 } else {
232 canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
233 SP_TYPE_CTRL,
234 "anchor", GTK_ANCHOR_CENTER,
235 "size", 10.0,
236 "stroked", TRUE,
237 "stroke_color", pre_snap ? 0x7f7f7fff : 0xff0000ff,
238 "mode", SP_KNOT_MODE_XOR,
239 "shape", SP_KNOT_SHAPE_CROSS,
240 NULL );
241 }
243 const int timeout_val = 1200; // TODO add preference for snap indicator timeout?
245 SP_CTRL(canvasitem)->moveto(p.getPoint());
246 _snaptarget = _desktop->add_temporary_canvasitem(canvasitem, timeout_val);
247 _snaptarget_is_presnap = pre_snap;
249 // Display the tooltip, which reveals the type of snap source and the type of snap target
250 gchar *tooltip_str = g_strconcat(source_name, _(" to "), target_name, NULL);
251 Geom::Point tooltip_pos = p.getPoint() + _desktop->w2d(Geom::Point(15, -15));
253 SPCanvasItem *canvas_tooltip = sp_canvastext_new(sp_desktop_tempgroup(_desktop), _desktop, tooltip_pos, tooltip_str);
254 if (pre_snap) {
255 SP_CANVASTEXT(canvas_tooltip)->rgba = 0x7f7f7fff;
256 }
257 g_free(tooltip_str);
259 sp_canvastext_set_anchor((SPCanvasText* )canvas_tooltip, -1, 1);
260 _snaptarget_tooltip = _desktop->add_temporary_canvasitem(canvas_tooltip, timeout_val);
262 // Display the bounding box, if we snapped to one
263 Geom::OptRect const bbox = p.getTargetBBox();
264 if (bbox) {
265 SPCanvasItem* box = sp_canvas_item_new(sp_desktop_tempgroup (_desktop),
266 SP_TYPE_CTRLRECT,
267 NULL);
269 SP_CTRLRECT(box)->setRectangle(*bbox);
270 SP_CTRLRECT(box)->setColor(pre_snap ? 0x7f7f7fff : 0xff0000ff, 0, 0);
271 SP_CTRLRECT(box)->setDashed(true);
272 sp_canvas_item_move_to_z(box, 0);
273 _snaptarget_bbox = _desktop->add_temporary_canvasitem(box, timeout_val);
274 }
275 }
276 }
278 void
279 SnapIndicator::remove_snaptarget(bool only_if_presnap)
280 {
281 if (only_if_presnap && !_snaptarget_is_presnap) {
282 return;
283 }
285 if (_snaptarget) {
286 _desktop->remove_temporary_canvasitem(_snaptarget);
287 _snaptarget = NULL;
288 _snaptarget_is_presnap = false;
289 }
291 if (_snaptarget_tooltip) {
292 _desktop->remove_temporary_canvasitem(_snaptarget_tooltip);
293 _snaptarget_tooltip = NULL;
294 }
296 if (_snaptarget_bbox) {
297 _desktop->remove_temporary_canvasitem(_snaptarget_bbox);
298 _snaptarget_bbox = NULL;
299 }
301 }
303 void
304 SnapIndicator::set_new_snapsource(Inkscape::SnapCandidatePoint const &p)
305 {
306 remove_snapsource();
308 g_assert(_desktop != NULL);
310 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
311 bool value = prefs->getBool("/options/snapindicator/value", true);
313 if (value) {
314 SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (_desktop),
315 SP_TYPE_CTRL,
316 "anchor", GTK_ANCHOR_CENTER,
317 "size", 6.0,
318 "stroked", TRUE,
319 "stroke_color", 0xff0000ff,
320 "mode", SP_KNOT_MODE_XOR,
321 "shape", SP_KNOT_SHAPE_CIRCLE,
322 NULL );
324 SP_CTRL(canvasitem)->moveto(p.getPoint());
325 _snapsource = _desktop->add_temporary_canvasitem(canvasitem, 1000);
326 }
327 }
329 void
330 SnapIndicator::remove_snapsource()
331 {
332 if (_snapsource) {
333 _desktop->remove_temporary_canvasitem(_snapsource);
334 _snapsource = NULL;
335 }
336 }
338 } //namespace Display
339 } /* namespace Inkscape */
342 /*
343 Local Variables:
344 mode:c++
345 c-file-style:"stroustrup"
346 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
347 indent-tabs-mode:nil
348 fill-column:99
349 End:
350 */
351 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 :