4999eb7cfa984d22724ce5b6377798d9a18dd3dd
1 #define __SHAPE_EDITOR_CPP__
3 /*
4 * Inkscape::ShapeEditor
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 */
11 #ifdef HAVE_CONFIG_H
12 #include "config.h"
13 #endif
15 #include <string.h>
16 #include <glibmm/i18n.h>
18 #include "sp-object.h"
19 #include "sp-item.h"
20 #include "live_effects/lpeobject.h"
21 #include "selection.h"
22 #include "desktop.h"
23 #include "document.h"
24 #include "desktop-handles.h"
25 #include "knotholder.h"
26 #include "live_effects/parameter/point.h"
27 #include "nodepath.h"
28 #include "xml/node-event-vector.h"
29 #include "preferences.h"
30 #include "object-edit.h"
31 #include "style.h"
32 #include "display/curve.h"
33 #include <2geom/pathvector.h>
35 #include "shape-editor.h"
38 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop */*dt*/) {
39 }
41 ShapeEditorsCollective::~ShapeEditorsCollective() {
42 }
45 void ShapeEditorsCollective::update_statusbar() {
47 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
49 }
51 ShapeEditor::ShapeEditor(SPDesktop *dt) {
52 this->desktop = dt;
53 this->grab_node = -1;
54 this->nodepath = NULL;
55 this->knotholder = NULL;
56 this->hit = false;
57 this->knotholder_listener_attached_for = NULL;
58 this->nodepath_listener_attached_for = NULL;
59 }
61 ShapeEditor::~ShapeEditor() {
62 unset_item(SH_KNOTHOLDER);
63 unset_item(SH_NODEPATH);
64 }
66 void ShapeEditor::unset_item(SubType type, bool keep_knotholder) {
67 Inkscape::XML::Node *old_repr = NULL;
69 switch (type) {
70 case SH_NODEPATH:
71 if (this->nodepath) {
72 old_repr = this->nodepath->repr;
73 if (old_repr && old_repr == nodepath_listener_attached_for) {
74 sp_repr_remove_listener_by_data(old_repr, this);
75 Inkscape::GC::release(old_repr);
76 nodepath_listener_attached_for = NULL;
77 }
79 this->grab_node = -1;
80 delete this->nodepath;
81 this->nodepath = NULL;
82 }
83 break;
84 case SH_KNOTHOLDER:
85 if (this->knotholder) {
86 old_repr = this->knotholder->repr;
87 if (old_repr && old_repr == knotholder_listener_attached_for) {
88 sp_repr_remove_listener_by_data(old_repr, this);
89 Inkscape::GC::release(old_repr);
90 knotholder_listener_attached_for = NULL;
91 }
93 if (!keep_knotholder) {
94 delete this->knotholder;
95 this->knotholder = NULL;
96 }
97 }
98 break;
99 }
100 }
102 bool ShapeEditor::has_nodepath () {
103 return (this->nodepath != NULL);
104 }
106 bool ShapeEditor::has_knotholder () {
107 return (this->knotholder != NULL);
108 }
110 void ShapeEditor::update_knotholder () {
111 if (this->knotholder)
112 this->knotholder->update_knots();
113 }
115 bool ShapeEditor::has_local_change (SubType type) {
116 switch (type) {
117 case SH_NODEPATH:
118 return (this->nodepath && this->nodepath->local_change);
119 case SH_KNOTHOLDER:
120 return (this->knotholder && this->knotholder->local_change != 0);
121 default:
122 g_assert_not_reached();
123 }
124 }
126 void ShapeEditor::decrement_local_change (SubType type) {
127 switch (type) {
128 case SH_NODEPATH:
129 if (this->nodepath && this->nodepath->local_change > 0) {
130 this->nodepath->local_change--;
131 }
132 break;
133 case SH_KNOTHOLDER:
134 if (this->knotholder) {
135 this->knotholder->local_change = FALSE;
136 }
137 break;
138 default:
139 g_assert_not_reached();
140 }
141 }
143 const SPItem *ShapeEditor::get_item (SubType type) {
144 const SPItem *item = NULL;
145 switch (type) {
146 case SH_NODEPATH:
147 if (this->has_nodepath()) {
148 item = this->nodepath->item;
149 }
150 break;
151 case SH_KNOTHOLDER:
152 if (this->has_knotholder()) {
153 item = this->knotholder->getItem();
154 }
155 break;
156 }
157 return item;
158 }
160 GList *ShapeEditor::save_nodepath_selection () {
161 if (this->nodepath)
162 return ::save_nodepath_selection (this->nodepath);
163 return NULL;
164 }
166 void ShapeEditor::restore_nodepath_selection (GList *saved) {
167 if (this->nodepath && saved)
168 ::restore_nodepath_selection (this->nodepath, saved);
169 }
171 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
172 if (nodepath && name) {
173 return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
174 }
176 return false;
177 }
180 void ShapeEditor::shapeeditor_event_attr_changed(gchar const *name)
181 {
182 gboolean changed_np = FALSE;
183 gboolean changed_kh = FALSE;
185 if (has_nodepath() && nodepath_edits_repr_key(name))
186 {
187 changed_np = !has_local_change(SH_NODEPATH);
188 decrement_local_change(SH_NODEPATH);
189 }
191 if (changed_np) {
192 GList *saved = NULL;
193 if (has_nodepath()) {
194 saved = save_nodepath_selection();
195 }
197 reset_item(SH_NODEPATH);
199 if (has_nodepath() && saved) {
200 restore_nodepath_selection(saved);
201 g_list_free (saved);
202 }
203 }
205 if (has_knotholder())
206 {
207 changed_kh = !has_local_change(SH_KNOTHOLDER);
208 decrement_local_change(SH_KNOTHOLDER);
209 if (changed_kh) {
210 // this can happen if an LPEItem's knotholder handle was dragged, in which case we want
211 // to keep the knotholder; in all other cases (e.g., if the LPE itself changes) we delete it
212 reset_item(SH_KNOTHOLDER, !strcmp(name, "d"));
213 }
214 }
216 update_statusbar(); //TODO: get_container()->update_statusbar();
217 }
220 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
221 gchar const */*old_value*/, gchar const */*new_value*/,
222 bool /*is_interactive*/, gpointer data)
223 {
224 g_assert(data);
225 ShapeEditor *sh = ((ShapeEditor *) data);
227 sh->shapeeditor_event_attr_changed(name);
228 }
230 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
231 NULL, /* child_added */
232 NULL, /* child_removed */
233 shapeeditor_event_attr_changed,
234 NULL, /* content_changed */
235 NULL /* order_changed */
236 };
239 void ShapeEditor::set_item(SPItem *item, SubType type, bool keep_knotholder) {
240 // this happens (and should only happen) when for an LPEItem having both knotholder and
241 // nodepath the knotholder is adapted; in this case we don't want to delete the knotholder
242 // since this freezes the handles
243 unset_item(type, keep_knotholder);
245 this->grab_node = -1;
247 if (item) {
248 Inkscape::XML::Node *repr;
249 switch(type) {
250 case SH_NODEPATH:
251 if (SP_IS_LPE_ITEM(item)) {
252 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
253 this->nodepath = sp_nodepath_new(desktop, item, (prefs->getBool("/tools/nodes/show_handles", true)));
254 }
255 if (this->nodepath) {
256 this->nodepath->shape_editor = this;
258 // setting new listener
259 repr = SP_OBJECT_REPR(item);
260 if (repr != nodepath_listener_attached_for) {
261 Inkscape::GC::anchor(repr);
262 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
263 nodepath_listener_attached_for = repr;
264 }
265 }
266 break;
268 case SH_KNOTHOLDER:
269 if (!this->knotholder) {
270 // only recreate knotholder if none is present
271 this->knotholder = sp_item_knot_holder(item, desktop);
272 }
273 if (this->knotholder) {
274 this->knotholder->update_knots();
275 // setting new listener
276 repr = this->knotholder->repr;
277 if (repr != knotholder_listener_attached_for) {
278 Inkscape::GC::anchor(repr);
279 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
280 knotholder_listener_attached_for = repr;
281 }
282 }
283 break;
284 }
285 }
286 }
288 /** Please note that this function only works for path parameters.
289 * All other parameters probably will crash Inkscape!
290 */
291 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, LivePathEffectObject *lpeobject, const char * key)
292 {
293 unset_item(SH_NODEPATH);
295 this->grab_node = -1;
297 if (lpeobject) {
298 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
299 this->nodepath = sp_nodepath_new( desktop, lpeobject,
300 (prefs->getInt("/tools/nodes/show_handles", true)),
301 key, item);
302 if (this->nodepath) {
303 this->nodepath->shape_editor = this;
305 // setting new listener
306 Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
307 if (repr && repr != nodepath_listener_attached_for) {
308 Inkscape::GC::anchor(repr);
309 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
310 nodepath_listener_attached_for = repr;
311 }
312 }
313 }
314 }
317 /** FIXME: This thing is only called when the item needs to be updated in response to repr change.
318 Why not make a reload function in NodePath and in KnotHolder? */
319 void ShapeEditor::reset_item (SubType type, bool keep_knotholder)
320 {
321 switch (type) {
322 case SH_NODEPATH:
323 if ( (nodepath) && (IS_LIVEPATHEFFECT(nodepath->object)) ) {
324 char * key = g_strdup(nodepath->repr_key);
325 set_item_lpe_path_parameter(nodepath->item, LIVEPATHEFFECT(nodepath->object), key); // the above checks for nodepath, so it is indeed a path that we are editing
326 g_free(key);
327 } else {
328 SPObject *obj = sp_desktop_document(desktop)->getObjectByRepr(nodepath_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
329 set_item(SP_ITEM(obj), SH_NODEPATH);
330 }
331 break;
332 case SH_KNOTHOLDER:
333 if ( knotholder ) {
334 SPObject *obj = sp_desktop_document(desktop)->getObjectByRepr(knotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
335 set_item(SP_ITEM(obj), SH_KNOTHOLDER, keep_knotholder);
336 }
337 break;
338 }
339 }
341 void ShapeEditor::nodepath_destroyed () {
342 this->nodepath = NULL;
343 }
345 void ShapeEditor::update_statusbar () {
346 if (this->nodepath)
347 sp_nodepath_update_statusbar(this->nodepath);
348 }
350 bool ShapeEditor::is_over_stroke (Geom::Point event_p, bool remember) {
351 if (!this->nodepath)
352 return false; // no stroke in knotholder
354 const SPItem *item = get_item(SH_NODEPATH);
356 if (!item || !SP_IS_ITEM(item))
357 return false;
359 //Translate click point into proper coord system
360 this->curvepoint_doc = desktop->w2d(event_p);
361 this->curvepoint_doc *= sp_item_dt2i_affine(item);
363 SPCurve *curve = this->nodepath->curve; // not sure if np->curve is always up to date...
364 Geom::PathVector const &pathv = curve->get_pathvector();
365 boost::optional<Geom::PathVectorPosition> pvpos = Geom::nearestPoint(pathv, this->curvepoint_doc);
366 if (!pvpos) {
367 g_print("Warning! Possible error?\n");
368 return false;
369 }
371 Geom::Point nearest = pathv[pvpos->path_nr].pointAt(pvpos->t);
372 Geom::Point delta = nearest - this->curvepoint_doc;
374 delta = desktop->d2w(delta);
376 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
377 double stroke_tolerance =
378 (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
379 desktop->current_zoom() *
380 SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
381 to_2geom(sp_item_i2d_affine(item)).descrim()
382 : 0.0)
383 + prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100)) / to_2geom(sp_item_i2d_affine(item)).descrim();
384 bool close = (Geom::L2 (delta) < stroke_tolerance);
386 if (remember && close) {
387 // calculate index for nodepath's representation.
388 double int_part;
389 double t = std::modf(pvpos->t, &int_part);
390 unsigned int segment_index = (unsigned int)int_part + 1;
391 for (unsigned int i = 0; i < pvpos->path_nr; ++i) {
392 segment_index += pathv[i].size() + 1;
393 if (pathv[i].closed())
394 segment_index += 1;
395 }
397 this->curvepoint_event[Geom::X] = (gint) event_p [Geom::X];
398 this->curvepoint_event[Geom::Y] = (gint) event_p [Geom::Y];
399 this->hit = true;
400 this->grab_t = t;
401 this->grab_node = segment_index;
402 }
404 return close;
405 }
407 void ShapeEditor::add_node_near_point() {
408 if (this->nodepath) {
409 sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
410 } else if (this->knotholder) {
411 // we do not add nodes in knotholder... yet
412 }
413 }
415 void ShapeEditor::select_segment_near_point(bool toggle) {
416 if (this->nodepath) {
417 sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
418 }
419 if (this->knotholder) {
420 // we do not select segments in knotholder... yet?
421 }
422 }
424 void ShapeEditor::cancel_hit() {
425 this->hit = false;
426 }
428 bool ShapeEditor::hits_curve() {
429 return (this->hit);
430 }
433 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
434 if (this->nodepath && !this->nodepath->straight_path) {
436 if (this->grab_node == -1) // don't know which segment to drag
437 return;
439 // We round off the extra precision in the motion coordinates provided
440 // by some input devices (like tablets). As we'll store the coordinates
441 // as integers in curvepoint_event we need to do this rounding before
442 // comparing them with the last coordinates from curvepoint_event.
443 // See bug #1593499 for details.
445 gint x = (gint) Inkscape::round(eventx);
446 gint y = (gint) Inkscape::round(eventy);
449 // The coordinates hasn't changed since the last motion event, abort
450 if (this->curvepoint_event[Geom::X] == x &&
451 this->curvepoint_event[Geom::Y] == y)
452 return;
454 Geom::Point const delta_w(eventx - this->curvepoint_event[Geom::X],
455 eventy - this->curvepoint_event[Geom::Y]);
456 Geom::Point const delta_dt(this->desktop->w2d(delta_w));
458 sp_nodepath_curve_drag (this->nodepath, this->grab_node, this->grab_t, delta_dt);
459 this->curvepoint_event[Geom::X] = x;
460 this->curvepoint_event[Geom::Y] = y;
462 }
463 if (this->knotholder) {
464 // we do not drag curve in knotholder
465 }
467 }
469 void ShapeEditor::finish_drag() {
470 if (this->nodepath && this->hit) {
471 sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
472 }
473 }
475 void ShapeEditor::select_rect(Geom::Rect const &rect, bool add) {
476 if (this->nodepath) {
477 sp_nodepath_select_rect(this->nodepath, rect, add);
478 }
479 }
481 bool ShapeEditor::has_selection() {
482 if (this->nodepath)
483 return this->nodepath->selected;
484 return false; // so far, knotholder cannot have selection
485 }
487 void ShapeEditor::deselect() {
488 if (this->nodepath)
489 sp_nodepath_deselect(this->nodepath);
490 }
492 void ShapeEditor::add_node () {
493 sp_node_selected_add_node(this->nodepath);
494 }
496 void ShapeEditor::delete_nodes () {
497 sp_node_selected_delete(this->nodepath);
498 }
500 void ShapeEditor::delete_nodes_preserving_shape () {
501 if (this->nodepath && this->nodepath->selected) {
502 sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
503 }
504 }
506 void ShapeEditor::delete_segment () {
507 sp_node_selected_delete_segment(this->nodepath);
508 }
510 void ShapeEditor::set_node_type(int type) {
511 sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
512 }
514 void ShapeEditor::break_at_nodes() {
515 sp_node_selected_break(this->nodepath);
516 }
518 void ShapeEditor::join_nodes() {
519 sp_node_selected_join(this->nodepath);
520 }
522 void ShapeEditor::join_segments() {
523 sp_node_selected_join_segment(this->nodepath);
524 }
526 void ShapeEditor::duplicate_nodes() {
527 sp_node_selected_duplicate(this->nodepath);
528 }
530 void ShapeEditor::set_type_of_segments(NRPathcode code) {
531 sp_node_selected_set_line_type(this->nodepath, code);
532 }
534 void ShapeEditor::move_nodes_screen(SPDesktop *desktop, gdouble dx, gdouble dy) {
535 sp_node_selected_move_screen(desktop, this->nodepath, dx, dy);
536 }
537 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
538 sp_node_selected_move(this->nodepath, dx, dy);
539 }
541 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
542 if (this->nodepath)
543 sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
544 }
546 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
547 sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
548 }
549 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
550 sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
551 }
553 void ShapeEditor::select_all (bool invert) {
554 if (this->nodepath)
555 sp_nodepath_select_all (this->nodepath, invert);
556 }
557 void ShapeEditor::select_all_from_subpath (bool invert) {
558 if (this->nodepath)
559 sp_nodepath_select_all_from_subpath (this->nodepath, invert);
560 }
561 void ShapeEditor::select_next () {
562 if (this->nodepath) {
563 sp_nodepath_select_next (this->nodepath);
564 if (this->nodepath->numSelected() >= 1) {
565 this->desktop->scroll_to_point(this->nodepath->singleSelectedCoords(), 1.0);
566 }
567 }
568 }
569 void ShapeEditor::select_prev () {
570 if (this->nodepath) {
571 sp_nodepath_select_prev (this->nodepath);
572 if (this->nodepath->numSelected() >= 1) {
573 this->desktop->scroll_to_point(this->nodepath->singleSelectedCoords(), 1.0);
574 }
575 }
576 }
578 void ShapeEditor::show_handles (bool show) {
579 if (this->nodepath && !this->nodepath->straight_path)
580 sp_nodepath_show_handles (this->nodepath, show);
581 }
583 void ShapeEditor::show_helperpath (bool show) {
584 if (this->nodepath)
585 sp_nodepath_show_helperpath (this->nodepath, show);
586 }
588 void ShapeEditor::flip (Geom::Dim2 axis, boost::optional<Geom::Point> center) {
589 if (this->nodepath)
590 sp_nodepath_flip (this->nodepath, axis, center);
591 }
593 void ShapeEditor::distribute (Geom::Dim2 axis) {
594 if (this->nodepath)
595 sp_nodepath_selected_distribute (this->nodepath, axis);
596 }
597 void ShapeEditor::align (Geom::Dim2 axis) {
598 if (this->nodepath)
599 sp_nodepath_selected_align (this->nodepath, axis);
600 }
603 /*
604 Local Variables:
605 mode:c++
606 c-file-style:"stroustrup"
607 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
608 indent-tabs-mode:nil
609 fill-column:99
610 End:
611 */
612 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :