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 sp_knot_holder_destroy(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 SPLPEItem *lpeitem = SP_LPE_ITEM(item);
194 if (!sp_lpe_item_get_current_lpe(lpeitem) || // if returns NULL, the whole expression evaluates to true and C++ will not call the otherwise crashing 2 functions below
195 !sp_lpe_item_get_current_lpe(lpeitem)->isVisible() ||
196 !sp_lpe_item_get_current_lpe(lpeitem)->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 =
200 sp_nodepath_new(desktop, item, (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
201 }
202 if (this->nodepath) {
203 this->nodepath->shape_editor = this;
204 }
205 this->knotholder = sp_item_knot_holder(item, desktop);
207 if (this->nodepath || this->knotholder) {
208 // setting new listener
209 Inkscape::XML::Node *repr;
210 if (this->knotholder)
211 repr = this->knotholder->repr;
212 else
213 repr = SP_OBJECT_REPR(item);
214 if (repr) {
215 Inkscape::GC::anchor(repr);
216 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
217 }
218 }
219 }
220 }
222 /** Please note that this function only works for path parameters.
223 * All other parameters probably will crash Inkscape!
224 */
225 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
226 {
227 unset_item();
229 this->grab_node = -1;
231 if (lpeobject) {
232 this->nodepath = sp_nodepath_new( desktop, lpeobject,
233 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
234 key, item);
235 if (this->nodepath) {
236 this->nodepath->shape_editor = this;
238 // setting new listener
239 Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
240 if (repr) {
241 Inkscape::GC::anchor(repr);
242 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
243 }
244 }
245 }
246 }
248 /**
249 * pass a new knotholder to ShapeEditor to manage (and delete)
250 */
251 void
252 ShapeEditor::set_knotholder(SPKnotHolder * knot_holder)
253 {
254 unset_item();
256 this->grab_node = -1;
258 if (knot_holder) {
259 this->knotholder = knot_holder;
260 }
261 }
264 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
265 Why not make a reload function in NodePath and in KnotHolder? */
266 void ShapeEditor::reset_item ()
267 {
268 if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
269 SPItem * item = this->nodepath->item;
270 SPObject *obj = this->nodepath->object;
271 char * key = g_strdup(this->nodepath->repr_key);
272 set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
273 g_free(key);
274 } else {
275 SPItem * item = get_item();
276 set_item(item);
277 }
278 }
280 void ShapeEditor::nodepath_destroyed () {
281 this->nodepath = NULL;
282 }
284 void ShapeEditor::update_statusbar () {
285 if (this->nodepath)
286 sp_nodepath_update_statusbar(this->nodepath);
287 }
289 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
291 if (!this->nodepath)
292 return false; // no stroke in knotholder
294 SPItem *item = get_item();
296 //Translate click point into proper coord system
297 this->curvepoint_doc = desktop->w2d(event_p);
298 this->curvepoint_doc *= sp_item_dt2i_affine(item);
300 sp_nodepath_ensure_livarot_path(this->nodepath);
302 NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
303 if (!position) {
304 return false;
305 }
307 NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
308 NR::Point delta = nearest - this->curvepoint_doc;
310 delta = desktop->d2w(delta);
312 double stroke_tolerance =
313 (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
314 desktop->current_zoom() *
315 SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
316 NR::expansion(sp_item_i2d_affine(item))
317 : 0.0)
318 + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(sp_item_i2d_affine(item));
319 bool close = (NR::L2 (delta) < stroke_tolerance);
321 if (remember && close) {
322 this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
323 this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
324 this->hit = true;
325 this->grab_t = position->t;
326 this->grab_node = position->piece;
327 }
329 return close;
330 }
332 void ShapeEditor::add_node_near_point() {
333 if (this->nodepath) {
334 sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
335 } else if (this->knotholder) {
336 // we do not add nodes in knotholder... yet
337 }
338 }
340 void ShapeEditor::select_segment_near_point(bool toggle) {
341 if (this->nodepath) {
342 sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
343 } else if (this->knotholder) {
344 // we do not select segments in knotholder... yet?
345 }
346 }
348 void ShapeEditor::cancel_hit() {
349 this->hit = false;
350 }
352 bool ShapeEditor::hits_curve() {
353 return (this->hit);
354 }
357 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
358 if (this->nodepath && !this->nodepath->straight_path) {
360 if (this->grab_node == -1) // don't know which segment to drag
361 return;
363 // We round off the extra precision in the motion coordinates provided
364 // by some input devices (like tablets). As we'll store the coordinates
365 // as integers in curvepoint_event we need to do this rounding before
366 // comparing them with the last coordinates from curvepoint_event.
367 // See bug #1593499 for details.
369 gint x = (gint) Inkscape::round(eventx);
370 gint y = (gint) Inkscape::round(eventy);
373 // The coordinates hasn't changed since the last motion event, abort
374 if (this->curvepoint_event[NR::X] == x &&
375 this->curvepoint_event[NR::Y] == y)
376 return;
378 NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
379 eventy - this->curvepoint_event[NR::Y]);
380 NR::Point const delta_dt(this->desktop->w2d(delta_w));
382 sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
383 this->curvepoint_event[NR::X] = x;
384 this->curvepoint_event[NR::Y] = y;
386 } else if (this->knotholder) {
387 // we do not drag curve in knotholder
388 }
390 }
392 void ShapeEditor::finish_drag() {
393 if (this->nodepath && this->hit) {
394 sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
395 }
396 }
398 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
399 if (this->nodepath) {
400 sp_nodepath_select_rect(this->nodepath, rect, add);
401 }
402 }
404 bool ShapeEditor::has_selection() {
405 if (this->nodepath)
406 return this->nodepath->selected;
407 return false; // so far, knotholder cannot have selection
408 }
410 void ShapeEditor::deselect() {
411 if (this->nodepath)
412 sp_nodepath_deselect(this->nodepath);
413 }
415 void ShapeEditor::add_node () {
416 sp_node_selected_add_node(this->nodepath);
417 }
419 void ShapeEditor::delete_nodes () {
420 sp_node_selected_delete(this->nodepath);
421 }
423 void ShapeEditor::delete_nodes_preserving_shape () {
424 if (this->nodepath && this->nodepath->selected) {
425 sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
426 }
427 }
429 void ShapeEditor::delete_segment () {
430 sp_node_selected_delete_segment(this->nodepath);
431 }
433 void ShapeEditor::set_node_type(int type) {
434 sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
435 }
437 void ShapeEditor::break_at_nodes() {
438 sp_node_selected_break(this->nodepath);
439 }
441 void ShapeEditor::join_nodes() {
442 sp_node_selected_join(this->nodepath);
443 }
445 void ShapeEditor::join_segments() {
446 sp_node_selected_join_segment(this->nodepath);
447 }
449 void ShapeEditor::duplicate_nodes() {
450 sp_node_selected_duplicate(this->nodepath);
451 }
453 void ShapeEditor::set_type_of_segments(NRPathcode code) {
454 sp_node_selected_set_line_type(this->nodepath, code);
455 }
457 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
458 sp_node_selected_move_screen(this->nodepath, dx, dy);
459 }
460 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
461 sp_node_selected_move(this->nodepath, dx, dy);
462 }
464 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
465 if (this->nodepath)
466 sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
467 }
469 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
470 sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
471 }
472 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
473 sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
474 }
476 void ShapeEditor::select_all (bool invert) {
477 if (this->nodepath)
478 sp_nodepath_select_all (this->nodepath, invert);
479 }
480 void ShapeEditor::select_all_from_subpath (bool invert) {
481 if (this->nodepath)
482 sp_nodepath_select_all_from_subpath (this->nodepath, invert);
483 }
484 void ShapeEditor::select_next () {
485 if (this->nodepath) {
486 sp_nodepath_select_next (this->nodepath);
487 if (this->nodepath->numSelected() >= 1) {
488 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
489 }
490 }
491 }
492 void ShapeEditor::select_prev () {
493 if (this->nodepath) {
494 sp_nodepath_select_prev (this->nodepath);
495 if (this->nodepath->numSelected() >= 1) {
496 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
497 }
498 }
499 }
501 void ShapeEditor::show_handles (bool show) {
502 if (this->nodepath && !this->nodepath->straight_path)
503 sp_nodepath_show_handles (this->nodepath, show);
504 }
506 void ShapeEditor::show_helperpath (bool show) {
507 if (this->nodepath)
508 sp_nodepath_show_helperpath (this->nodepath, show);
509 }
511 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
512 if (this->nodepath)
513 sp_nodepath_flip (this->nodepath, axis, center);
514 }
516 void ShapeEditor::distribute (NR::Dim2 axis) {
517 if (this->nodepath)
518 sp_nodepath_selected_distribute (this->nodepath, axis);
519 }
520 void ShapeEditor::align (NR::Dim2 axis) {
521 if (this->nodepath)
522 sp_nodepath_selected_align (this->nodepath, axis);
523 }
526 /*
527 Local Variables:
528 mode:c++
529 c-file-style:"stroustrup"
530 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
531 indent-tabs-mode:nil
532 fill-column:99
533 End:
534 */
535 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :