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