1 #define __SP_GUIDE_C__
3 /*
4 * Inkscape guideline implementation
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * Peter Moulder <pmoulder@mail.csse.monash.edu.au>
9 * Johan Engelen
10 *
11 * Copyright (C) 2000-2002 authors
12 * Copyright (C) 2004 Monash University
13 * Copyright (C) 2007 Johan Engelen
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
22 #include <algorithm>
23 #include <cstring>
24 #include <string>
25 #include "display/guideline.h"
26 #include "svg/svg.h"
27 #include "svg/stringstream.h"
28 #include "attributes.h"
29 #include "sp-guide.h"
30 #include <sp-item-notify-moveto.h>
31 #include <sp-item.h>
32 #include <sp-guide-constraint.h>
33 #include <glibmm/i18n.h>
34 #include <xml/repr.h>
35 #include <remove-last.h>
36 #include "sp-metrics.h"
37 #include "inkscape.h"
38 #include "desktop.h"
39 #include "sp-namedview.h"
40 #include <2geom/angle.h>
41 #include "document.h"
43 using std::vector;
45 enum {
46 PROP_0,
47 PROP_COLOR,
48 PROP_HICOLOR
49 };
51 static void sp_guide_class_init(SPGuideClass *gc);
52 static void sp_guide_init(SPGuide *guide);
53 static void sp_guide_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
54 static void sp_guide_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
56 static void sp_guide_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
57 static void sp_guide_release(SPObject *object);
58 static void sp_guide_set(SPObject *object, unsigned int key, const gchar *value);
60 static SPObjectClass *parent_class;
62 GType sp_guide_get_type(void)
63 {
64 static GType guide_type = 0;
66 if (!guide_type) {
67 GTypeInfo guide_info = {
68 sizeof(SPGuideClass),
69 NULL, NULL,
70 (GClassInitFunc) sp_guide_class_init,
71 NULL, NULL,
72 sizeof(SPGuide),
73 16,
74 (GInstanceInitFunc) sp_guide_init,
75 NULL, /* value_table */
76 };
77 guide_type = g_type_register_static(SP_TYPE_OBJECT, "SPGuide", &guide_info, (GTypeFlags) 0);
78 }
80 return guide_type;
81 }
83 static void sp_guide_class_init(SPGuideClass *gc)
84 {
85 GObjectClass *gobject_class = (GObjectClass *) gc;
86 SPObjectClass *sp_object_class = (SPObjectClass *) gc;
88 parent_class = (SPObjectClass*) g_type_class_ref(SP_TYPE_OBJECT);
90 gobject_class->set_property = sp_guide_set_property;
91 gobject_class->get_property = sp_guide_get_property;
93 sp_object_class->build = sp_guide_build;
94 sp_object_class->release = sp_guide_release;
95 sp_object_class->set = sp_guide_set;
97 g_object_class_install_property(gobject_class,
98 PROP_COLOR,
99 g_param_spec_uint("color", "Color", "Color",
100 0,
101 0xffffffff,
102 0xff000000,
103 (GParamFlags) G_PARAM_READWRITE));
105 g_object_class_install_property(gobject_class,
106 PROP_HICOLOR,
107 g_param_spec_uint("hicolor", "HiColor", "HiColor",
108 0,
109 0xffffffff,
110 0xff000000,
111 (GParamFlags) G_PARAM_READWRITE));
112 }
114 static void sp_guide_init(SPGuide *guide)
115 {
116 guide->normal_to_line = component_vectors[NR::Y];
117 guide->point_on_line = Geom::Point(0.,0.);
118 guide->color = 0x0000ff7f;
119 guide->hicolor = 0xff00007f;
120 }
122 static void sp_guide_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec */*pspec*/)
123 {
124 SPGuide &guide = *SP_GUIDE(object);
126 switch (prop_id) {
127 case PROP_COLOR:
128 guide.color = g_value_get_uint(value);
129 for (GSList *l = guide.views; l != NULL; l = l->next) {
130 sp_guideline_set_color(SP_GUIDELINE(l->data), guide.color);
131 }
132 break;
134 case PROP_HICOLOR:
135 guide.hicolor = g_value_get_uint(value);
136 break;
137 }
138 }
140 static void sp_guide_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec */*pspec*/)
141 {
142 SPGuide const &guide = *SP_GUIDE(object);
144 switch (prop_id) {
145 case PROP_COLOR:
146 g_value_set_uint(value, guide.color);
147 break;
148 case PROP_HICOLOR:
149 g_value_set_uint(value, guide.hicolor);
150 break;
151 }
152 }
154 static void sp_guide_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
155 {
156 if (((SPObjectClass *) (parent_class))->build) {
157 (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
158 }
160 sp_object_read_attr(object, "orientation");
161 sp_object_read_attr(object, "position");
162 }
164 static void sp_guide_release(SPObject *object)
165 {
166 SPGuide *guide = (SPGuide *) object;
168 while (guide->views) {
169 gtk_object_destroy(GTK_OBJECT(guide->views->data));
170 guide->views = g_slist_remove(guide->views, guide->views->data);
171 }
173 if (((SPObjectClass *) parent_class)->release) {
174 ((SPObjectClass *) parent_class)->release(object);
175 }
176 }
178 static void sp_guide_set(SPObject *object, unsigned int key, const gchar *value)
179 {
180 SPGuide *guide = SP_GUIDE(object);
182 switch (key) {
183 case SP_ATTR_ORIENTATION:
184 {
185 if (value && !strcmp(value, "horizontal")) {
186 /* Visual representation of a horizontal line, constrain vertically (y coordinate). */
187 guide->normal_to_line = component_vectors[NR::Y];
188 } else if (value && !strcmp(value, "vertical")) {
189 guide->normal_to_line = component_vectors[NR::X];
190 } else if (value) {
191 gchar ** strarray = g_strsplit(value, ",", 2);
192 double newx, newy;
193 unsigned int success = sp_svg_number_read_d(strarray[0], &newx);
194 success += sp_svg_number_read_d(strarray[1], &newy);
195 g_strfreev (strarray);
196 if (success == 2) {
197 Geom::Point direction(newx, newy);
198 direction.normalize();
199 guide->normal_to_line = direction;
200 } else {
201 // default to vertical line for bad arguments
202 guide->normal_to_line = component_vectors[NR::X];
203 }
204 } else {
205 // default to vertical line for bad arguments
206 guide->normal_to_line = component_vectors[NR::X];
207 }
208 sp_guide_set_normal(*guide, guide->normal_to_line.to_2geom(), false);
209 }
210 break;
211 case SP_ATTR_POSITION:
212 {
213 gchar ** strarray = g_strsplit(value, ",", 2);
214 double newx, newy;
215 unsigned int success = sp_svg_number_read_d(strarray[0], &newx);
216 success += sp_svg_number_read_d(strarray[1], &newy);
217 g_strfreev (strarray);
218 if (success == 2) {
219 guide->point_on_line = Geom::Point(newx, newy);
220 } else if (success == 1) {
221 // before 0.46 style guideline definition.
222 const gchar *attr = SP_OBJECT_REPR(object)->attribute("orientation");
223 if (attr && !strcmp(attr, "horizontal")) {
224 guide->point_on_line = Geom::Point(0, newx);
225 } else {
226 guide->point_on_line = Geom::Point(newx, 0);
227 }
228 }
230 // update position in non-committing way
231 // fixme: perhaps we need to add an update method instead, and request_update here
232 sp_guide_moveto(*guide, guide->point_on_line, false);
233 }
234 break;
235 default:
236 if (((SPObjectClass *) (parent_class))->set) {
237 ((SPObjectClass *) (parent_class))->set(object, key, value);
238 }
239 break;
240 }
241 }
243 SPGuide *
244 sp_guide_create(SPDocument *doc, Geom::Point const &pt1, Geom::Point const &pt2) {
245 SPDesktop *desktop = inkscape_active_desktop();
246 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
248 Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
250 Geom::Point n = Geom::rot90(pt2 - pt1);
252 sp_repr_set_point(repr, "position", pt1);
253 sp_repr_set_point(repr, "orientation", n);
255 SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
256 Inkscape::GC::release(repr);
258 SPGuide *guide= SP_GUIDE(doc->getObjectByRepr(repr));
259 return guide;
260 }
262 void
263 sp_guide_pt_pairs_to_guides(SPDocument *doc, std::list<std::pair<Geom::Point, Geom::Point> > &pts) {
264 for (std::list<std::pair<Geom::Point, Geom::Point> >::iterator i = pts.begin(); i != pts.end(); ++i) {
265 sp_guide_create(doc, (*i).first, (*i).second);
266 }
267 }
269 void sp_guide_show(SPGuide *guide, SPCanvasGroup *group, GCallback handler)
270 {
271 SPCanvasItem *item = sp_guideline_new(group, guide->point_on_line, guide->normal_to_line.to_2geom());
272 sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
274 g_signal_connect(G_OBJECT(item), "event", G_CALLBACK(handler), guide);
276 guide->views = g_slist_prepend(guide->views, item);
277 }
279 void sp_guide_hide(SPGuide *guide, SPCanvas *canvas)
280 {
281 g_assert(guide != NULL);
282 g_assert(SP_IS_GUIDE(guide));
283 g_assert(canvas != NULL);
284 g_assert(SP_IS_CANVAS(canvas));
286 for (GSList *l = guide->views; l != NULL; l = l->next) {
287 if (canvas == SP_CANVAS_ITEM(l->data)->canvas) {
288 gtk_object_destroy(GTK_OBJECT(l->data));
289 guide->views = g_slist_remove(guide->views, l->data);
290 return;
291 }
292 }
294 g_assert_not_reached();
295 }
297 void sp_guide_sensitize(SPGuide *guide, SPCanvas *canvas, gboolean sensitive)
298 {
299 g_assert(guide != NULL);
300 g_assert(SP_IS_GUIDE(guide));
301 g_assert(canvas != NULL);
302 g_assert(SP_IS_CANVAS(canvas));
304 for (GSList *l = guide->views; l != NULL; l = l->next) {
305 if (canvas == SP_CANVAS_ITEM(l->data)->canvas) {
306 sp_guideline_set_sensitive(SP_GUIDELINE(l->data), sensitive);
307 return;
308 }
309 }
311 g_assert_not_reached();
312 }
314 Geom::Point sp_guide_position_from_pt(SPGuide const *guide, NR::Point const &pt)
315 {
316 return -(pt.to_2geom() - guide->point_on_line);
317 }
319 double sp_guide_distance_from_pt(SPGuide const *guide, Geom::Point const &pt)
320 {
321 return dot(pt - guide->point_on_line, guide->normal_to_line);
322 }
324 /**
325 * \arg commit False indicates temporary moveto in response to motion event while dragging,
326 * true indicates a "committing" version: in response to button release event after
327 * dragging a guideline, or clicking OK in guide editing dialog.
328 */
329 void sp_guide_moveto(SPGuide const &guide, Geom::Point const point_on_line, bool const commit)
330 {
331 g_assert(SP_IS_GUIDE(&guide));
333 for (GSList *l = guide.views; l != NULL; l = l->next) {
334 sp_guideline_set_position(SP_GUIDELINE(l->data), point_on_line);
335 }
337 /* Calling sp_repr_set_point must precede calling sp_item_notify_moveto in the commit
338 case, so that the guide's new position is available for sp_item_rm_unsatisfied_cns. */
339 if (commit) {
340 sp_repr_set_point(SP_OBJECT(&guide)->repr, "position", point_on_line);
341 }
343 /* DISABLED CODE BECAUSE SPGuideAttachment IS NOT USE AT THE MOMENT (johan)
344 for (vector<SPGuideAttachment>::const_iterator i(guide.attached_items.begin()),
345 iEnd(guide.attached_items.end());
346 i != iEnd; ++i)
347 {
348 SPGuideAttachment const &att = *i;
349 sp_item_notify_moveto(*att.item, guide, att.snappoint_ix, position, commit);
350 }
351 */
352 }
354 /**
355 * \arg commit False indicates temporary moveto in response to motion event while dragging,
356 * true indicates a "committing" version: in response to button release event after
357 * dragging a guideline, or clicking OK in guide editing dialog.
358 */
359 void sp_guide_set_normal(SPGuide const &guide, Geom::Point const normal_to_line, bool const commit)
360 {
361 g_assert(SP_IS_GUIDE(&guide));
363 for (GSList *l = guide.views; l != NULL; l = l->next) {
364 sp_guideline_set_normal(SP_GUIDELINE(l->data), normal_to_line);
365 }
367 /* Calling sp_repr_set_svg_point must precede calling sp_item_notify_moveto in the commit
368 case, so that the guide's new position is available for sp_item_rm_unsatisfied_cns. */
369 if (commit) {
370 sp_repr_set_point(SP_OBJECT(&guide)->repr, "orientation", normal_to_line);
371 }
373 /* DISABLED CODE BECAUSE SPGuideAttachment IS NOT USE AT THE MOMENT (johan)
374 for (vector<SPGuideAttachment>::const_iterator i(guide.attached_items.begin()),
375 iEnd(guide.attached_items.end());
376 i != iEnd; ++i)
377 {
378 SPGuideAttachment const &att = *i;
379 sp_item_notify_moveto(*att.item, guide, att.snappoint_ix, position, commit);
380 }
381 */
382 }
384 /**
385 * Returns a human-readable description of the guideline for use in dialog boxes and status bar.
386 *
387 * The caller is responsible for freeing the string.
388 */
389 char *sp_guide_description(SPGuide const *guide)
390 {
391 using NR::X;
392 using NR::Y;
394 GString *position_string_x = SP_PX_TO_METRIC_STRING(guide->point_on_line[X], SP_ACTIVE_DESKTOP->namedview->getDefaultMetric());
395 GString *position_string_y = SP_PX_TO_METRIC_STRING(guide->point_on_line[Y], SP_ACTIVE_DESKTOP->namedview->getDefaultMetric());
397 if ( guide->normal_to_line == component_vectors[X] ) {
398 return g_strdup_printf(_("vertical, at %s"), position_string_x->str);
399 } else if ( guide->normal_to_line == component_vectors[Y] ) {
400 return g_strdup_printf(_("horizontal, at %s"), position_string_y->str);
401 } else {
402 double const radians = guide->angle();
403 double const degrees = Geom::rad_to_deg(radians);
404 int const degrees_int = (int) round(degrees);
405 return g_strdup_printf(_("at %d degrees, through (%s,%s); <b>Ctrl</b>+click to delete"), degrees_int, position_string_x->str, position_string_y->str);
406 }
408 g_string_free(position_string_x, TRUE);
409 g_string_free(position_string_y, TRUE);
410 }
412 void sp_guide_remove(SPGuide *guide)
413 {
414 g_assert(SP_IS_GUIDE(guide));
416 for (vector<SPGuideAttachment>::const_iterator i(guide->attached_items.begin()),
417 iEnd(guide->attached_items.end());
418 i != iEnd; ++i)
419 {
420 SPGuideAttachment const &att = *i;
421 remove_last(att.item->constraints, SPGuideConstraint(guide, att.snappoint_ix));
422 }
423 guide->attached_items.clear();
425 sp_repr_unparent(SP_OBJECT(guide)->repr);
426 }
428 /*
429 Local Variables:
430 mode:c++
431 c-file-style:"stroustrup"
432 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
433 indent-tabs-mode:nil
434 fill-column:99
435 End:
436 */
437 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :