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