src/shape-editor.cpp

   1 #define __SHAPE_EDITOR_CPP__
   2
   3 /*
   4  * Inkscape::ShapeEditor
   5  *
   6  * Authors:
   7  *   bulia byak <buliabyak@users.sf.net>
   8  *
   9  */
  10
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include <glibmm/i18n.h>
  16
  17 #include "sp-object.h"
  18 #include "sp-item.h"
  19 #include "live_effects/lpeobject.h"
  20 #include "selection.h"
  21 #include "desktop.h"
  22 #include "desktop-handles.h"
  23 #include "knotholder.h"
  24 #include "node-context.h"
  25 #include "xml/node-event-vector.h"
  26 #include "prefs-utils.h"
  27 #include "object-edit.h"
  28 #include "splivarot.h"
  29 #include "style.h"
  30
  31 #include "shape-editor.h"
  32
  33
  34 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop *dt) {
  35 }
  36
  37 ShapeEditorsCollective::~ShapeEditorsCollective() {
  38 }
  39
  40
  41 void ShapeEditorsCollective::update_statusbar() {
  42
  43 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
  44
  45 }
  46
  47 ShapeEditor::ShapeEditor(SPDesktop *dt) {
  48     this->desktop = dt;
  49     this->grab_node = -1;
  50     this->nodepath = NULL;
  51     this->knotholder = NULL;
  52     this->hit = false;
  53 }
  54
  55 ShapeEditor::~ShapeEditor() {
  56     unset_item();
  57 }
  58
  59 void ShapeEditor::unset_item() {
  60
  61     Inkscape::XML::Node *old_repr = NULL;
  62
  63     if (this->nodepath) {
  64         old_repr = this->nodepath->repr;
  65     }
  66
  67     if (!old_repr && this->knotholder) {
  68         old_repr = this->knotholder->repr;
  69     }
  70
  71     if (old_repr) { // remove old listener
  72         sp_repr_remove_listener_by_data(old_repr, this);
  73         Inkscape::GC::release(old_repr);
  74     }
  75
  76     if (this->nodepath) {
  77         this->grab_node = -1;
  78         sp_nodepath_destroy(this->nodepath);
  79         this->nodepath = NULL;
  80     }
  81
  82     if (this->knotholder) {
  83         sp_knot_holder_destroy(this->knotholder);
  84         this->knotholder = NULL;
  85     }
  86 }
  87
  88 bool ShapeEditor::has_nodepath () {
  89     return (this->nodepath != NULL);
  90 }
  91
  92 bool ShapeEditor::has_knotholder () {
  93     return (this->knotholder != NULL);
  94 }
  95
  96 bool ShapeEditor::has_local_change () {
  97     if (this->nodepath)
  98         return (this->nodepath->local_change != 0);
  99     else if (this->knotholder)
 100         return (this->knotholder->local_change != 0);
 101     else
 102         return false;
 103 }
 104
 105 void ShapeEditor::decrement_local_change () {
 106     if (this->nodepath) {
 107         if (this->nodepath->local_change > 0)
 108             this->nodepath->local_change--;
 109     } else if (this->knotholder) {
 110         this->knotholder->local_change = FALSE;
 111     }
 112 }
 113
 114 SPItem *ShapeEditor::get_item () {
 115     SPItem *item = NULL;
 116     if (this->has_nodepath()) {
 117         item = this->nodepath->item;
 118     } else if (this->has_knotholder()) {
 119         item = SP_ITEM(this->knotholder->item);
 120     }
 121     return item;
 122 }
 123
 124 GList *ShapeEditor::save_nodepath_selection () {
 125     if (this->nodepath)
 126         return ::save_nodepath_selection (this->nodepath);
 127     return NULL;
 128 }
 129
 130 void ShapeEditor::restore_nodepath_selection (GList *saved) {
 131     if (this->nodepath && saved)
 132         ::restore_nodepath_selection (this->nodepath, saved);
 133 }
 134
 135
 136 static void shapeeditor_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 137                                            gchar const *old_value, gchar const *new_value,
 138                                            bool is_interactive, gpointer data)
 139 {
 140     gboolean changed = FALSE;
 141
 142     g_assert(data);
 143     ShapeEditor *sh = ((ShapeEditor *) data);
 144
 145     if ( ((sh->has_nodepath())
 146          && (!strcmp(name, "d") || !strcmp(name, "sodipodi:nodetypes")))  // With paths, we only need to act if one of the path-affecting attributes has changed.
 147          || sh->has_knotholder())
 148     {
 149         changed = !sh->has_local_change();
 150         sh->decrement_local_change();
 151     }
 152
 153     if (changed) {
 154         GList *saved = NULL;
 155         if (sh->has_nodepath()) {
 156             saved = sh->save_nodepath_selection();
 157         }
 158
 159         sh->reset_item ();
 160
 161         if (sh->has_nodepath() && saved) {
 162             sh->restore_nodepath_selection(saved);
 163             g_list_free (saved);
 164         }
 165     }
 166
 167     sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
 168 }
 169
 170 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
 171     NULL, /* child_added */
 172     NULL, /* child_removed */
 173     shapeeditor_event_attr_changed,
 174     NULL, /* content_changed */
 175     NULL  /* order_changed */
 176 };
 177
 178
 179 void ShapeEditor::set_item(SPItem *item) {
 180
 181     unset_item();
 182
 183     this->grab_node = -1;
 184
 185     if (item) {
 186         this->nodepath = sp_nodepath_new(desktop, item, (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
 187         if (this->nodepath) {
 188             this->nodepath->shape_editor = this;
 189         }
 190         this->knotholder = sp_item_knot_holder(item, desktop);
 191
 192         if (this->nodepath || this->knotholder) {
 193             // setting new listener
 194             Inkscape::XML::Node *repr;
 195             if (this->knotholder)
 196                 repr = this->knotholder->repr;
 197             else
 198                 repr = SP_OBJECT_REPR(item);
 199             if (repr) {
 200                 Inkscape::GC::anchor(repr);
 201                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 202             }
 203         }
 204     }
 205 }
 206
 207 /** Please note that this function only works for path parameters.
 208 *  All other parameters probably will crash Inkscape!
 209 *  Fortunately, there are no other on-canvas edittable objects at this moment :)
 210 */
 211 void ShapeEditor::set_item_livepatheffect_parameter(SPItem *item, SPObject *lpeobject, const char * key) {
 212
 213     unset_item();
 214
 215     this->grab_node = -1;
 216
 217     if (lpeobject) {
 218         this->knotholder = NULL; // it's a path, no special knotholder needed.
 219         this->nodepath = sp_nodepath_new( desktop, lpeobject,
 220                                           (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
 221                                           key, item);
 222         if (this->nodepath) {
 223             this->nodepath->shape_editor = this;
 224
 225             // setting new listener
 226             Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
 227             if (repr) {
 228                 Inkscape::GC::anchor(repr);
 229                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 230             }
 231         }
 232     }
 233 }
 234
 235 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
 236    Why not make a reload function in NodePath and in KnotHolder? */
 237 void ShapeEditor::reset_item ()
 238 {
 239     if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
 240         SPItem * item = this->nodepath->item;
 241         SPObject *obj = this->nodepath->object;
 242         char * key = g_strdup(this->nodepath->repr_key);
 243         set_item_livepatheffect_parameter(item, obj, key);
 244         g_free(key);
 245     } else {
 246         SPItem * item = get_item();
 247         set_item(item);
 248     }
 249 }
 250
 251 void ShapeEditor::nodepath_destroyed () {
 252     this->nodepath = NULL;
 253 }
 254
 255 void ShapeEditor::update_statusbar () {
 256     if (this->nodepath)
 257         sp_nodepath_update_statusbar(this->nodepath);
 258 }
 259
 260 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
 261
 262     if (!this->nodepath)
 263         return false; // no stroke in knotholder
 264
 265     SPItem *item = get_item();
 266
 267     //Translate click point into proper coord system
 268     this->curvepoint_doc = desktop->w2d(event_p);
 269     this->curvepoint_doc *= sp_item_dt2i_affine(item);
 270
 271     sp_nodepath_ensure_livarot_path(this->nodepath);
 272
 273     NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
 274     if (!position) {
 275         return false;
 276     }
 277
 278     NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
 279     NR::Point delta = nearest - this->curvepoint_doc;
 280
 281     delta = desktop->d2w(delta);
 282
 283     double stroke_tolerance =
 284         ( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
 285          desktop->current_zoom() *
 286          SP_OBJECT_STYLE (item)->stroke_width.computed *
 287          sp_item_i2d_affine (item).expansion() * 0.5
 288          : 0.0)
 289         + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); //(double) SP_EVENT_CONTEXT(nc)->tolerance;
 290
 291     bool close = (NR::L2 (delta) < stroke_tolerance);
 292
 293     if (remember && close) {
 294         this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
 295         this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
 296         this->hit = true;
 297         this->grab_t = position->t;
 298         this->grab_node = position->piece;
 299     }
 300
 301     return close;
 302 }
 303
 304 void ShapeEditor::add_node_near_point() {
 305     if (this->nodepath) {
 306         sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
 307     } else if (this->knotholder) {
 308         // we do not add nodes in knotholder... yet
 309     }
 310 }
 311
 312 void ShapeEditor::select_segment_near_point(bool toggle) {
 313     if (this->nodepath) {
 314         sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
 315     } else if (this->knotholder) {
 316         // we do not select segments in knotholder... yet?
 317     }
 318 }
 319
 320 void ShapeEditor::cancel_hit() {
 321     this->hit = false;
 322 }
 323
 324 bool ShapeEditor::hits_curve() {
 325     return (this->hit);
 326 }
 327
 328
 329 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
 330     if (this->nodepath && !this->nodepath->straight_path) {
 331
 332         if (this->grab_node == -1) // don't know which segment to drag
 333             return;
 334
 335         // We round off the extra precision in the motion coordinates provided
 336         // by some input devices (like tablets). As we'll store the coordinates
 337         // as integers in curvepoint_event we need to do this rounding before
 338         // comparing them with the last coordinates from curvepoint_event.
 339         // See bug #1593499 for details.
 340
 341         gint x = (gint) Inkscape::round(eventx);
 342         gint y = (gint) Inkscape::round(eventy);
 343
 344
 345         // The coordinates hasn't changed since the last motion event, abort
 346         if (this->curvepoint_event[NR::X] == x &&
 347             this->curvepoint_event[NR::Y] == y)
 348             return;
 349
 350         NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
 351                                 eventy - this->curvepoint_event[NR::Y]);
 352         NR::Point const delta_dt(this->desktop->w2d(delta_w));
 353
 354         sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
 355         this->curvepoint_event[NR::X] = x;
 356         this->curvepoint_event[NR::Y] = y;
 357
 358     } else if (this->knotholder) {
 359         // we do not drag curve in knotholder
 360     }
 361
 362 }
 363
 364 void ShapeEditor::finish_drag() {
 365     if (this->nodepath && this->hit) {
 366         sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
 367     }
 368 }
 369
 370 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
 371     if (this->nodepath) {
 372         sp_nodepath_select_rect(this->nodepath, rect, add);
 373     }
 374 }
 375
 376 bool ShapeEditor::has_selection() {
 377     if (this->nodepath)
 378         return this->nodepath->selected;
 379     return false; //  so far, knotholder cannot have selection
 380 }
 381
 382 void ShapeEditor::deselect() {
 383     if (this->nodepath)
 384         sp_nodepath_deselect(this->nodepath);
 385 }
 386
 387 void ShapeEditor::add_node () {
 388     sp_node_selected_add_node(this->nodepath);
 389 }
 390
 391 void ShapeEditor::delete_nodes () {
 392     sp_node_selected_delete(this->nodepath);
 393 }
 394
 395 void ShapeEditor::delete_nodes_preserving_shape () {
 396     if (this->nodepath && this->nodepath->selected) {
 397         sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
 398     }
 399 }
 400
 401 void ShapeEditor::delete_segment () {
 402     sp_node_selected_delete_segment(this->nodepath);
 403 }
 404
 405 void ShapeEditor::set_node_type(int type) {
 406     sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
 407 }
 408
 409 void ShapeEditor::break_at_nodes() {
 410     sp_node_selected_break(this->nodepath);
 411 }
 412
 413 void ShapeEditor::join_nodes() {
 414     sp_node_selected_join(this->nodepath);
 415 }
 416
 417 void ShapeEditor::join_segments() {
 418     sp_node_selected_join_segment(this->nodepath);
 419 }
 420
 421 void ShapeEditor::duplicate_nodes() {
 422     sp_node_selected_duplicate(this->nodepath);
 423 }
 424
 425 void ShapeEditor::set_type_of_segments(NRPathcode code) {
 426     sp_node_selected_set_line_type(this->nodepath, code);
 427 }
 428
 429 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
 430     sp_node_selected_move_screen(this->nodepath, dx, dy);
 431 }
 432 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
 433     sp_node_selected_move(this->nodepath, dx, dy);
 434 }
 435
 436 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
 437     if (this->nodepath)
 438         sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
 439 }
 440
 441 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
 442     sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
 443 }
 444 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
 445     sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
 446 }
 447
 448 void ShapeEditor::select_all (bool invert) {
 449     if (this->nodepath)
 450         sp_nodepath_select_all (this->nodepath, invert);
 451 }
 452 void ShapeEditor::select_all_from_subpath (bool invert) {
 453     if (this->nodepath)
 454         sp_nodepath_select_all_from_subpath (this->nodepath, invert);
 455 }
 456 void ShapeEditor::select_next () {
 457     if (this->nodepath) {
 458         sp_nodepath_select_next (this->nodepath);
 459         if (this->nodepath->numSelected() >= 1) {
 460             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 461         }
 462     }
 463 }
 464 void ShapeEditor::select_prev () {
 465     if (this->nodepath) {
 466         sp_nodepath_select_prev (this->nodepath);
 467         if (this->nodepath->numSelected() >= 1) {
 468             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 469         }
 470     }
 471 }
 472
 473 void ShapeEditor::show_handles (bool show) {
 474     if (this->nodepath)
 475         sp_nodepath_show_handles (this->nodepath, show);
 476 }
 477
 478
 479 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
 480     if (this->nodepath)
 481         sp_nodepath_flip (this->nodepath, axis, center);
 482 }
 483
 484 void ShapeEditor::distribute (NR::Dim2 axis) {
 485     if (this->nodepath)
 486         sp_nodepath_selected_distribute (this->nodepath, axis);
 487 }
 488 void ShapeEditor::align (NR::Dim2 axis) {
 489     if (this->nodepath)
 490         sp_nodepath_selected_align (this->nodepath, axis);
 491 }
 492
 493
 494 /*
 495   Local Variables:
 496   mode:c++
 497   c-file-style:"stroustrup"
 498   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 499   indent-tabs-mode:nil
 500   fill-column:99
 501   End:
 502 */
 503 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :