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 "desktop-handles.h"
24 #include "knotholder.h"
25 #include "live_effects/parameter/pointparam-knotholder.h"
26 #include "node-context.h"
27 #include "xml/node-event-vector.h"
28 #include "prefs-utils.h"
29 #include "object-edit.h"
30 #include "splivarot.h"
31 #include "style.h"
33 #include "shape-editor.h"
36 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop */*dt*/) {
37 }
39 ShapeEditorsCollective::~ShapeEditorsCollective() {
40 }
43 void ShapeEditorsCollective::update_statusbar() {
45 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
47 }
49 ShapeEditor::ShapeEditor(SPDesktop *dt) {
50 this->desktop = dt;
51 this->grab_node = -1;
52 this->nodepath = NULL;
53 this->knotholder = NULL;
54 this->hit = false;
55 }
57 ShapeEditor::~ShapeEditor() {
58 unset_item();
59 }
61 void ShapeEditor::unset_item() {
63 Inkscape::XML::Node *old_repr = NULL;
65 if (this->nodepath) {
66 old_repr = this->nodepath->repr;
67 }
69 if (!old_repr && this->knotholder) {
70 old_repr = this->knotholder->repr;
71 }
73 if (old_repr) { // remove old listener
74 sp_repr_remove_listener_by_data(old_repr, this);
75 Inkscape::GC::release(old_repr);
76 }
78 if (this->nodepath) {
79 this->grab_node = -1;
80 sp_nodepath_destroy(this->nodepath);
81 this->nodepath = NULL;
82 }
84 if (this->knotholder) {
85 delete this->knotholder;
86 this->knotholder = NULL;
87 }
88 }
90 bool ShapeEditor::has_nodepath () {
91 return (this->nodepath != NULL);
92 }
94 bool ShapeEditor::has_knotholder () {
95 return (this->knotholder != NULL);
96 }
98 bool ShapeEditor::has_local_change () {
99 if (this->nodepath)
100 return (this->nodepath->local_change != 0);
101 else if (this->knotholder)
102 return (this->knotholder->local_change != 0);
103 else
104 return false;
105 }
107 void ShapeEditor::decrement_local_change () {
108 if (this->nodepath) {
109 if (this->nodepath->local_change > 0)
110 this->nodepath->local_change--;
111 } else if (this->knotholder) {
112 this->knotholder->local_change = FALSE;
113 }
114 }
116 SPItem *ShapeEditor::get_item () {
117 SPItem *item = NULL;
118 if (this->has_nodepath()) {
119 item = this->nodepath->item;
120 } else if (this->has_knotholder()) {
121 item = SP_ITEM(this->knotholder->item);
122 }
123 return item;
124 }
126 GList *ShapeEditor::save_nodepath_selection () {
127 if (this->nodepath)
128 return ::save_nodepath_selection (this->nodepath);
129 return NULL;
130 }
132 void ShapeEditor::restore_nodepath_selection (GList *saved) {
133 if (this->nodepath && saved)
134 ::restore_nodepath_selection (this->nodepath, saved);
135 }
137 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
138 if (nodepath && name) {
139 return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
140 }
142 return false;
143 }
145 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
146 gchar const */*old_value*/, gchar const */*new_value*/,
147 bool /*is_interactive*/, gpointer data)
148 {
149 gboolean changed = FALSE;
151 g_assert(data);
152 ShapeEditor *sh = ((ShapeEditor *) data);
154 if ( sh->has_knotholder() || ( sh->has_nodepath() && sh->nodepath_edits_repr_key(name) ) )
155 {
156 changed = !sh->has_local_change();
157 sh->decrement_local_change();
158 }
160 if (changed) {
161 GList *saved = NULL;
162 if (sh->has_nodepath()) {
163 saved = sh->save_nodepath_selection();
164 }
166 sh->reset_item ();
168 if (sh->has_nodepath() && saved) {
169 sh->restore_nodepath_selection(saved);
170 g_list_free (saved);
171 }
172 }
174 sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
175 }
177 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
178 NULL, /* child_added */
179 NULL, /* child_removed */
180 shapeeditor_event_attr_changed,
181 NULL, /* content_changed */
182 NULL /* order_changed */
183 };
186 void ShapeEditor::set_item(SPItem *item) {
188 unset_item();
190 this->grab_node = -1;
192 if (item) {
193 if (SP_IS_LPE_ITEM(item)) {
194 SPLPEItem *lpeitem = SP_LPE_ITEM(item);
195 Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(lpeitem);
196 if (!(lpe && lpe->isVisible() && lpe->providesKnotholder())) {
197 // only create nodepath if the item either doesn't have an LPE
198 // or the LPE is invisible or it doesn't provide a knotholder itself
199 this->nodepath = sp_nodepath_new(desktop, item,
200 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
201 } else if (lpe && lpe->isVisible()) {
202 sp_lpe_item_add_temporary_canvasitems(lpeitem, desktop);
203 }
204 }
206 if (this->nodepath) {
207 this->nodepath->shape_editor = this;
208 }
209 this->knotholder = sp_item_knot_holder(item, desktop);
211 if (this->nodepath || this->knotholder) {
212 // setting new listener
213 Inkscape::XML::Node *repr;
214 if (this->knotholder)
215 repr = this->knotholder->repr;
216 else
217 repr = SP_OBJECT_REPR(item);
218 if (repr) {
219 Inkscape::GC::anchor(repr);
220 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
221 }
222 }
223 }
224 }
226 /** Please note that this function only works for path parameters.
227 * All other parameters probably will crash Inkscape!
228 */
229 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
230 {
231 unset_item();
233 this->grab_node = -1;
235 if (lpeobject) {
236 this->nodepath = sp_nodepath_new( desktop, lpeobject,
237 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
238 key, item);
239 if (this->nodepath) {
240 this->nodepath->shape_editor = this;
242 // setting new listener
243 Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
244 if (repr) {
245 Inkscape::GC::anchor(repr);
246 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
247 }
248 }
249 }
250 }
252 /**
253 * pass a new knotholder to ShapeEditor to manage (and delete)
254 */
255 void
256 ShapeEditor::set_knotholder(KnotHolder * knot_holder)
257 {
258 unset_item();
260 this->grab_node = -1;
262 if (knot_holder) {
263 this->knotholder = knot_holder;
264 }
265 }
268 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
269 Why not make a reload function in NodePath and in KnotHolder? */
270 void ShapeEditor::reset_item ()
271 {
272 if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
273 SPItem * item = this->nodepath->item;
274 SPObject *obj = this->nodepath->object;
275 char * key = g_strdup(this->nodepath->repr_key);
276 set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
277 g_free(key);
278 } else {
279 SPItem * item = get_item();
280 set_item(item);
281 }
282 }
284 void ShapeEditor::nodepath_destroyed () {
285 this->nodepath = NULL;
286 }
288 void ShapeEditor::update_statusbar () {
289 if (this->nodepath)
290 sp_nodepath_update_statusbar(this->nodepath);
291 }
293 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
295 if (!this->nodepath)
296 return false; // no stroke in knotholder
298 SPItem *item = get_item();
300 //Translate click point into proper coord system
301 this->curvepoint_doc = desktop->w2d(event_p);
302 this->curvepoint_doc *= from_2geom(sp_item_dt2i_affine(item));
304 sp_nodepath_ensure_livarot_path(this->nodepath);
306 NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
307 if (!position) {
308 return false;
309 }
311 NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
312 NR::Point delta = nearest - this->curvepoint_doc;
314 delta = desktop->d2w(delta);
316 double stroke_tolerance =
317 (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
318 desktop->current_zoom() *
319 SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
320 NR::expansion(from_2geom(sp_item_i2d_affine(item)))
321 : 0.0)
322 + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(from_2geom(sp_item_i2d_affine(item)));
323 bool close = (NR::L2 (delta) < stroke_tolerance);
325 if (remember && close) {
326 this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
327 this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
328 this->hit = true;
329 this->grab_t = position->t;
330 this->grab_node = position->piece;
331 }
333 return close;
334 }
336 void ShapeEditor::add_node_near_point() {
337 if (this->nodepath) {
338 sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
339 } else if (this->knotholder) {
340 // we do not add nodes in knotholder... yet
341 }
342 }
344 void ShapeEditor::select_segment_near_point(bool toggle) {
345 if (this->nodepath) {
346 sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
347 } else if (this->knotholder) {
348 // we do not select segments in knotholder... yet?
349 }
350 }
352 void ShapeEditor::cancel_hit() {
353 this->hit = false;
354 }
356 bool ShapeEditor::hits_curve() {
357 return (this->hit);
358 }
361 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
362 if (this->nodepath && !this->nodepath->straight_path) {
364 if (this->grab_node == -1) // don't know which segment to drag
365 return;
367 // We round off the extra precision in the motion coordinates provided
368 // by some input devices (like tablets). As we'll store the coordinates
369 // as integers in curvepoint_event we need to do this rounding before
370 // comparing them with the last coordinates from curvepoint_event.
371 // See bug #1593499 for details.
373 gint x = (gint) Inkscape::round(eventx);
374 gint y = (gint) Inkscape::round(eventy);
377 // The coordinates hasn't changed since the last motion event, abort
378 if (this->curvepoint_event[NR::X] == x &&
379 this->curvepoint_event[NR::Y] == y)
380 return;
382 NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
383 eventy - this->curvepoint_event[NR::Y]);
384 NR::Point const delta_dt(this->desktop->w2d(delta_w));
386 sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
387 this->curvepoint_event[NR::X] = x;
388 this->curvepoint_event[NR::Y] = y;
390 } else if (this->knotholder) {
391 // we do not drag curve in knotholder
392 }
394 }
396 void ShapeEditor::finish_drag() {
397 if (this->nodepath && this->hit) {
398 sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
399 }
400 }
402 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
403 if (this->nodepath) {
404 sp_nodepath_select_rect(this->nodepath, rect, add);
405 }
406 }
408 bool ShapeEditor::has_selection() {
409 if (this->nodepath)
410 return this->nodepath->selected;
411 return false; // so far, knotholder cannot have selection
412 }
414 void ShapeEditor::deselect() {
415 if (this->nodepath)
416 sp_nodepath_deselect(this->nodepath);
417 }
419 void ShapeEditor::add_node () {
420 sp_node_selected_add_node(this->nodepath);
421 }
423 void ShapeEditor::delete_nodes () {
424 sp_node_selected_delete(this->nodepath);
425 }
427 void ShapeEditor::delete_nodes_preserving_shape () {
428 if (this->nodepath && this->nodepath->selected) {
429 sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
430 }
431 }
433 void ShapeEditor::delete_segment () {
434 sp_node_selected_delete_segment(this->nodepath);
435 }
437 void ShapeEditor::set_node_type(int type) {
438 sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
439 }
441 void ShapeEditor::break_at_nodes() {
442 sp_node_selected_break(this->nodepath);
443 }
445 void ShapeEditor::join_nodes() {
446 sp_node_selected_join(this->nodepath);
447 }
449 void ShapeEditor::join_segments() {
450 sp_node_selected_join_segment(this->nodepath);
451 }
453 void ShapeEditor::duplicate_nodes() {
454 sp_node_selected_duplicate(this->nodepath);
455 }
457 void ShapeEditor::set_type_of_segments(NRPathcode code) {
458 sp_node_selected_set_line_type(this->nodepath, code);
459 }
461 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
462 sp_node_selected_move_screen(this->nodepath, dx, dy);
463 }
464 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
465 sp_node_selected_move(this->nodepath, dx, dy);
466 }
468 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
469 if (this->nodepath)
470 sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
471 }
473 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
474 sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
475 }
476 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
477 sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
478 }
480 void ShapeEditor::select_all (bool invert) {
481 if (this->nodepath)
482 sp_nodepath_select_all (this->nodepath, invert);
483 }
484 void ShapeEditor::select_all_from_subpath (bool invert) {
485 if (this->nodepath)
486 sp_nodepath_select_all_from_subpath (this->nodepath, invert);
487 }
488 void ShapeEditor::select_next () {
489 if (this->nodepath) {
490 sp_nodepath_select_next (this->nodepath);
491 if (this->nodepath->numSelected() >= 1) {
492 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
493 }
494 }
495 }
496 void ShapeEditor::select_prev () {
497 if (this->nodepath) {
498 sp_nodepath_select_prev (this->nodepath);
499 if (this->nodepath->numSelected() >= 1) {
500 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
501 }
502 }
503 }
505 void ShapeEditor::show_handles (bool show) {
506 if (this->nodepath && !this->nodepath->straight_path)
507 sp_nodepath_show_handles (this->nodepath, show);
508 }
510 void ShapeEditor::show_helperpath (bool show) {
511 if (this->nodepath)
512 sp_nodepath_show_helperpath (this->nodepath, show);
513 }
515 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
516 if (this->nodepath)
517 sp_nodepath_flip (this->nodepath, axis, center);
518 }
520 void ShapeEditor::distribute (NR::Dim2 axis) {
521 if (this->nodepath)
522 sp_nodepath_selected_distribute (this->nodepath, axis);
523 }
524 void ShapeEditor::align (NR::Dim2 axis) {
525 if (this->nodepath)
526 sp_nodepath_selected_align (this->nodepath, axis);
527 }
530 /*
531 Local Variables:
532 mode:c++
533 c-file-style:"stroustrup"
534 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
535 indent-tabs-mode:nil
536 fill-column:99
537 End:
538 */
539 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :