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 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
 136     if (nodepath && name) {
 137         return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
 138     }
 139
 140     return false;
 141 }
 142
 143 static void shapeeditor_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
 144                                            gchar const *old_value, gchar const *new_value,
 145                                            bool is_interactive, gpointer data)
 146 {
 147     gboolean changed = FALSE;
 148
 149     g_assert(data);
 150     ShapeEditor *sh = ((ShapeEditor *) data);
 151
 152     if ( sh->has_knotholder() || ( sh->has_nodepath() && sh->nodepath_edits_repr_key(name) ) )
 153     {
 154         changed = !sh->has_local_change();
 155         sh->decrement_local_change();
 156     }
 157
 158     if (changed) {
 159         GList *saved = NULL;
 160         if (sh->has_nodepath()) {
 161             saved = sh->save_nodepath_selection();
 162         }
 163
 164         sh->reset_item ();
 165
 166         if (sh->has_nodepath() && saved) {
 167             sh->restore_nodepath_selection(saved);
 168             g_list_free (saved);
 169         }
 170     }
 171
 172     sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
 173 }
 174
 175 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
 176     NULL, /* child_added */
 177     NULL, /* child_removed */
 178     shapeeditor_event_attr_changed,
 179     NULL, /* content_changed */
 180     NULL  /* order_changed */
 181 };
 182
 183
 184 void ShapeEditor::set_item(SPItem *item) {
 185
 186     unset_item();
 187
 188     this->grab_node = -1;
 189
 190     if (item) {
 191         this->nodepath = sp_nodepath_new(desktop, item, (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
 192         if (this->nodepath) {
 193             this->nodepath->shape_editor = this;
 194         }
 195         this->knotholder = sp_item_knot_holder(item, desktop);
 196
 197         if (this->nodepath || this->knotholder) {
 198             // setting new listener
 199             Inkscape::XML::Node *repr;
 200             if (this->knotholder)
 201                 repr = this->knotholder->repr;
 202             else
 203                 repr = SP_OBJECT_REPR(item);
 204             if (repr) {
 205                 Inkscape::GC::anchor(repr);
 206                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 207             }
 208         }
 209     }
 210 }
 211
 212 /** Please note that this function only works for path parameters.
 213 *  All other parameters probably will crash Inkscape!
 214 *  Fortunately, there are no other on-canvas edittable objects at this moment :)
 215 */
 216 void ShapeEditor::set_item_livepatheffect_parameter(SPItem *item, SPObject *lpeobject, const char * key) {
 217
 218     unset_item();
 219
 220     this->grab_node = -1;
 221
 222     if (lpeobject) {
 223         this->knotholder = NULL; // it's a path, no special knotholder needed.
 224         this->nodepath = sp_nodepath_new( desktop, lpeobject,
 225                                           (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
 226                                           key, item);
 227         if (this->nodepath) {
 228             this->nodepath->shape_editor = this;
 229
 230             // setting new listener
 231             Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
 232             if (repr) {
 233                 Inkscape::GC::anchor(repr);
 234                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 235             }
 236         }
 237     }
 238 }
 239
 240 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
 241    Why not make a reload function in NodePath and in KnotHolder? */
 242 void ShapeEditor::reset_item ()
 243 {
 244     if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
 245         SPItem * item = this->nodepath->item;
 246         SPObject *obj = this->nodepath->object;
 247         char * key = g_strdup(this->nodepath->repr_key);
 248         set_item_livepatheffect_parameter(item, obj, key);
 249         g_free(key);
 250     } else {
 251         SPItem * item = get_item();
 252         set_item(item);
 253     }
 254 }
 255
 256 void ShapeEditor::nodepath_destroyed () {
 257     this->nodepath = NULL;
 258 }
 259
 260 void ShapeEditor::update_statusbar () {
 261     if (this->nodepath)
 262         sp_nodepath_update_statusbar(this->nodepath);
 263 }
 264
 265 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
 266
 267     if (!this->nodepath)
 268         return false; // no stroke in knotholder
 269
 270     SPItem *item = get_item();
 271
 272     //Translate click point into proper coord system
 273     this->curvepoint_doc = desktop->w2d(event_p);
 274     this->curvepoint_doc *= sp_item_dt2i_affine(item);
 275
 276     sp_nodepath_ensure_livarot_path(this->nodepath);
 277
 278     NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
 279     if (!position) {
 280         return false;
 281     }
 282
 283     NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
 284     NR::Point delta = nearest - this->curvepoint_doc;
 285
 286     delta = desktop->d2w(delta);
 287
 288     double stroke_tolerance =
 289         ( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
 290          desktop->current_zoom() *
 291          SP_OBJECT_STYLE (item)->stroke_width.computed *
 292          sp_item_i2d_affine (item).expansion() * 0.5
 293          : 0.0)
 294         + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); //(double) SP_EVENT_CONTEXT(nc)->tolerance;
 295
 296     bool close = (NR::L2 (delta) < stroke_tolerance);
 297
 298     if (remember && close) {
 299         this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
 300         this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
 301         this->hit = true;
 302         this->grab_t = position->t;
 303         this->grab_node = position->piece;
 304     }
 305
 306     return close;
 307 }
 308
 309 void ShapeEditor::add_node_near_point() {
 310     if (this->nodepath) {
 311         sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
 312     } else if (this->knotholder) {
 313         // we do not add nodes in knotholder... yet
 314     }
 315 }
 316
 317 void ShapeEditor::select_segment_near_point(bool toggle) {
 318     if (this->nodepath) {
 319         sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
 320     } else if (this->knotholder) {
 321         // we do not select segments in knotholder... yet?
 322     }
 323 }
 324
 325 void ShapeEditor::cancel_hit() {
 326     this->hit = false;
 327 }
 328
 329 bool ShapeEditor::hits_curve() {
 330     return (this->hit);
 331 }
 332
 333
 334 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
 335     if (this->nodepath && !this->nodepath->straight_path) {
 336
 337         if (this->grab_node == -1) // don't know which segment to drag
 338             return;
 339
 340         // We round off the extra precision in the motion coordinates provided
 341         // by some input devices (like tablets). As we'll store the coordinates
 342         // as integers in curvepoint_event we need to do this rounding before
 343         // comparing them with the last coordinates from curvepoint_event.
 344         // See bug #1593499 for details.
 345
 346         gint x = (gint) Inkscape::round(eventx);
 347         gint y = (gint) Inkscape::round(eventy);
 348
 349
 350         // The coordinates hasn't changed since the last motion event, abort
 351         if (this->curvepoint_event[NR::X] == x &&
 352             this->curvepoint_event[NR::Y] == y)
 353             return;
 354
 355         NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
 356                                 eventy - this->curvepoint_event[NR::Y]);
 357         NR::Point const delta_dt(this->desktop->w2d(delta_w));
 358
 359         sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
 360         this->curvepoint_event[NR::X] = x;
 361         this->curvepoint_event[NR::Y] = y;
 362
 363     } else if (this->knotholder) {
 364         // we do not drag curve in knotholder
 365     }
 366
 367 }
 368
 369 void ShapeEditor::finish_drag() {
 370     if (this->nodepath && this->hit) {
 371         sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
 372     }
 373 }
 374
 375 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
 376     if (this->nodepath) {
 377         sp_nodepath_select_rect(this->nodepath, rect, add);
 378     }
 379 }
 380
 381 bool ShapeEditor::has_selection() {
 382     if (this->nodepath)
 383         return this->nodepath->selected;
 384     return false; //  so far, knotholder cannot have selection
 385 }
 386
 387 void ShapeEditor::deselect() {
 388     if (this->nodepath)
 389         sp_nodepath_deselect(this->nodepath);
 390 }
 391
 392 void ShapeEditor::add_node () {
 393     sp_node_selected_add_node(this->nodepath);
 394 }
 395
 396 void ShapeEditor::delete_nodes () {
 397     sp_node_selected_delete(this->nodepath);
 398 }
 399
 400 void ShapeEditor::delete_nodes_preserving_shape () {
 401     if (this->nodepath && this->nodepath->selected) {
 402         sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
 403     }
 404 }
 405
 406 void ShapeEditor::delete_segment () {
 407     sp_node_selected_delete_segment(this->nodepath);
 408 }
 409
 410 void ShapeEditor::set_node_type(int type) {
 411     sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
 412 }
 413
 414 void ShapeEditor::break_at_nodes() {
 415     sp_node_selected_break(this->nodepath);
 416 }
 417
 418 void ShapeEditor::join_nodes() {
 419     sp_node_selected_join(this->nodepath);
 420 }
 421
 422 void ShapeEditor::join_segments() {
 423     sp_node_selected_join_segment(this->nodepath);
 424 }
 425
 426 void ShapeEditor::duplicate_nodes() {
 427     sp_node_selected_duplicate(this->nodepath);
 428 }
 429
 430 void ShapeEditor::set_type_of_segments(NRPathcode code) {
 431     sp_node_selected_set_line_type(this->nodepath, code);
 432 }
 433
 434 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
 435     sp_node_selected_move_screen(this->nodepath, dx, dy);
 436 }
 437 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
 438     sp_node_selected_move(this->nodepath, dx, dy);
 439 }
 440
 441 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
 442     if (this->nodepath)
 443         sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
 444 }
 445
 446 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
 447     sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
 448 }
 449 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
 450     sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
 451 }
 452
 453 void ShapeEditor::select_all (bool invert) {
 454     if (this->nodepath)
 455         sp_nodepath_select_all (this->nodepath, invert);
 456 }
 457 void ShapeEditor::select_all_from_subpath (bool invert) {
 458     if (this->nodepath)
 459         sp_nodepath_select_all_from_subpath (this->nodepath, invert);
 460 }
 461 void ShapeEditor::select_next () {
 462     if (this->nodepath) {
 463         sp_nodepath_select_next (this->nodepath);
 464         if (this->nodepath->numSelected() >= 1) {
 465             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 466         }
 467     }
 468 }
 469 void ShapeEditor::select_prev () {
 470     if (this->nodepath) {
 471         sp_nodepath_select_prev (this->nodepath);
 472         if (this->nodepath->numSelected() >= 1) {
 473             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 474         }
 475     }
 476 }
 477
 478 void ShapeEditor::show_handles (bool show) {
 479     if (this->nodepath)
 480         sp_nodepath_show_handles (this->nodepath, show);
 481 }
 482
 483
 484 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
 485     if (this->nodepath)
 486         sp_nodepath_flip (this->nodepath, axis, center);
 487 }
 488
 489 void ShapeEditor::distribute (NR::Dim2 axis) {
 490     if (this->nodepath)
 491         sp_nodepath_selected_distribute (this->nodepath, axis);
 492 }
 493 void ShapeEditor::align (NR::Dim2 axis) {
 494     if (this->nodepath)
 495         sp_nodepath_selected_align (this->nodepath, axis);
 496 }
 497
 498
 499 /*
 500   Local Variables:
 501   mode:c++
 502   c-file-style:"stroustrup"
 503   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 504   indent-tabs-mode:nil
 505   fill-column:99
 506   End:
 507 */
 508 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :