src/node-context.cpp

   1 #define __SP_NODE_CONTEXT_C__
   2
   3 /*
   4  * Node editing context
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * This code is in public domain
  11  */
  12
  13 #ifdef HAVE_CONFIG_H
  14 # include "config.h"
  15 #endif
  16 #include <cstring>
  17 #include <string>
  18 #include <gdk/gdkkeysyms.h>
  19 #include "macros.h"
  20 #include <glibmm/i18n.h>
  21 #include "display/sp-canvas-util.h"
  22 #include "object-edit.h"
  23 #include "sp-path.h"
  24 #include "path-chemistry.h"
  25 #include "rubberband.h"
  26 #include "desktop.h"
  27 #include "desktop-handles.h"
  28 #include "selection.h"
  29 #include "pixmaps/cursor-node.xpm"
  30 #include "message-context.h"
  31 #include "node-context.h"
  32 #include "pixmaps/cursor-node-d.xpm"
  33 #include "prefs-utils.h"
  34 #include "xml/node-event-vector.h"
  35 #include "style.h"
  36 #include "splivarot.h"
  37 #include "shape-editor.h"
  38 #include "live_effects/effect.h"
  39
  40 // needed for flash nodepath upon mouseover:
  41 #include "display/canvas-bpath.h"
  42 #include "display/curve.h"
  43
  44 static void sp_node_context_class_init(SPNodeContextClass *klass);
  45 static void sp_node_context_init(SPNodeContext *node_context);
  46 static void sp_node_context_dispose(GObject *object);
  47
  48 static void sp_node_context_setup(SPEventContext *ec);
  49 static gint sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  50 static gint sp_node_context_item_handler(SPEventContext *event_context,
  51                                          SPItem *item, GdkEvent *event);
  52
  53 static SPEventContextClass *parent_class;
  54
  55 GType
  56 sp_node_context_get_type()
  57 {
  58     static GType type = 0;
  59     if (!type) {
  60         GTypeInfo info = {
  61             sizeof(SPNodeContextClass),
  62             NULL, NULL,
  63             (GClassInitFunc) sp_node_context_class_init,
  64             NULL, NULL,
  65             sizeof(SPNodeContext),
  66             4,
  67             (GInstanceInitFunc) sp_node_context_init,
  68             NULL,    /* value_table */
  69         };
  70         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPNodeContext", &info, (GTypeFlags)0);
  71     }
  72     return type;
  73 }
  74
  75 static void
  76 sp_node_context_class_init(SPNodeContextClass *klass)
  77 {
  78     GObjectClass *object_class = (GObjectClass *) klass;
  79     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  80
  81     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  82
  83     object_class->dispose = sp_node_context_dispose;
  84
  85     event_context_class->setup = sp_node_context_setup;
  86     event_context_class->root_handler = sp_node_context_root_handler;
  87     event_context_class->item_handler = sp_node_context_item_handler;
  88 }
  89
  90 static void
  91 sp_node_context_init(SPNodeContext *node_context)
  92 {
  93     SPEventContext *event_context = SP_EVENT_CONTEXT(node_context);
  94
  95     event_context->cursor_shape = cursor_node_xpm;
  96     event_context->hot_x = 1;
  97     event_context->hot_y = 1;
  98
  99     node_context->leftalt = FALSE;
 100     node_context->rightalt = FALSE;
 101     node_context->leftctrl = FALSE;
 102     node_context->rightctrl = FALSE;
 103
 104     new (&node_context->sel_changed_connection) sigc::connection();
 105
 106     node_context->flash_tempitem = NULL;
 107     node_context->flashed_item = NULL;
 108     node_context->remove_flash_counter = 0;
 109 }
 110
 111 static void
 112 sp_node_context_dispose(GObject *object)
 113 {
 114     SPNodeContext *nc = SP_NODE_CONTEXT(object);
 115     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 116
 117     ec->enableGrDrag(false);
 118
 119     if (nc->flash_permitem) {
 120         // hack!!! (we add a temporary canvasitem with life time 1 ms)
 121         nc->flash_tempitem = nc->event_context.desktop->add_temporary_canvasitem (nc->flash_permitem, 1);
 122         nc->flash_permitem = NULL;
 123     }
 124
 125     nc->sel_changed_connection.disconnect();
 126     nc->sel_changed_connection.~connection();
 127
 128     delete nc->shape_editor;
 129
 130     if (nc->_node_message_context) {
 131         delete nc->_node_message_context;
 132     }
 133
 134     G_OBJECT_CLASS(parent_class)->dispose(object);
 135 }
 136
 137 static void
 138 sp_node_context_setup(SPEventContext *ec)
 139 {
 140     SPNodeContext *nc = SP_NODE_CONTEXT(ec);
 141
 142     if (((SPEventContextClass *) parent_class)->setup)
 143         ((SPEventContextClass *) parent_class)->setup(ec);
 144
 145     nc->sel_changed_connection.disconnect();
 146     nc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(sigc::bind(sigc::ptr_fun(&sp_node_context_selection_changed), (gpointer)nc));
 147
 148     Inkscape::Selection *selection = sp_desktop_selection(ec->desktop);
 149     SPItem *item = selection->singleItem();
 150
 151     nc->shape_editor = new ShapeEditor(ec->desktop);
 152
 153     nc->rb_escaped = false;
 154
 155     nc->cursor_drag = false;
 156
 157     nc->added_node = false;
 158
 159     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 160
 161     if (item) {
 162         nc->shape_editor->set_item(item);
 163     }
 164
 165     if (prefs_get_int_attribute("tools.nodes", "selcue", 0) != 0) {
 166         ec->enableSelectionCue();
 167     }
 168
 169     if (prefs_get_int_attribute("tools.nodes", "gradientdrag", 0) != 0) {
 170         ec->enableGrDrag();
 171     }
 172
 173     ec->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
 174
 175     nc->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 176
 177     nc->shape_editor->update_statusbar();
 178 }
 179
 180 static SPCanvasItem *
 181 sp_node_context_generate_helperpath(SPDesktop *desktop, SPPath *path) {
 182     // This should be put somewhere else under the name of "generate helperpath" or something. Because basically this is copied of code from nodepath...
 183     SPCurve *curve_new = sp_path_get_curve_for_edit(path);
 184     SPCurve *flash_curve = curve_new->copy();
 185     flash_curve->transform(from_2geom(sp_item_i2d_affine(SP_ITEM(path))));
 186     SPCanvasItem * canvasitem = sp_canvas_bpath_new(sp_desktop_tempgroup(desktop), flash_curve);
 187     // would be nice if its color could be XORed or something, now it is invisible for red stroked objects...
 188     // unless we also flash the nodes...
 189     guint32 color = prefs_get_int_attribute("tools.nodes", "highlight_color", 0xff0000ff);
 190     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(canvasitem), color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 191     sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(canvasitem), 0, SP_WIND_RULE_NONZERO);
 192     sp_canvas_item_show(canvasitem);
 193     flash_curve->unref();
 194     return canvasitem;
 195 }
 196
 197 static void
 198 sp_node_context_flash_path(SPEventContext *event_context, SPItem *item, guint timeout) {
 199     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 200
 201     nc->remove_flash_counter = 3; // for some reason root_handler is called twice after each item_handler...
 202     if (nc->flashed_item != item) {
 203         // we entered a new item
 204         nc->flashed_item = item;
 205         SPDesktop *desktop = event_context->desktop;
 206         if (nc->flash_tempitem) {
 207             desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 208             nc->flash_tempitem = NULL;
 209         }
 210
 211         if (SP_IS_PATH(item)) {
 212             SPCanvasItem *canvasitem = sp_node_context_generate_helperpath(desktop, SP_PATH(item));
 213             nc->flash_tempitem = desktop->add_temporary_canvasitem (canvasitem, timeout);
 214         }
 215     }
 216 }
 217
 218 /**
 219 \brief  Callback that processes the "changed" signal on the selection;
 220 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
 221 */
 222 void
 223 sp_node_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 224 {
 225     SPNodeContext *nc = SP_NODE_CONTEXT(data);
 226
 227     // TODO: update ShapeEditorsCollective instead
 228     nc->shape_editor->unset_item();
 229     SPItem *item = selection->singleItem();
 230     nc->shape_editor->set_item(item);
 231
 232     if (nc->flash_permitem) {
 233         // hack!!! (we add a temporary canvasitem with life time 1 ms)
 234         nc->flash_tempitem = nc->event_context.desktop->add_temporary_canvasitem (nc->flash_permitem, 1);
 235         nc->flash_permitem = NULL;
 236     }
 237     if (SP_IS_LPE_ITEM(item)) {
 238         Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 239         if (lpe && lpe->pathFlashType() == Inkscape::LivePathEffect::PERMANENT_FLASH) {
 240             if (SP_IS_PATH(item)) {
 241                 SPCanvasItem *canvasitem = sp_node_context_generate_helperpath(nc->event_context.desktop, SP_PATH(item));
 242                 nc->flash_permitem = canvasitem;
 243             }
 244         }
 245     }
 246
 247     nc->shape_editor->update_statusbar();
 248 }
 249
 250 void
 251 sp_node_context_show_modifier_tip(SPEventContext *event_context, GdkEvent *event)
 252 {
 253     sp_event_show_modifier_tip
 254         (event_context->defaultMessageContext(), event,
 255          _("<b>Ctrl</b>: toggle node type, snap handle angle, move hor/vert; <b>Ctrl+Alt</b>: move along handles"),
 256          _("<b>Shift</b>: toggle node selection, disable snapping, rotate both handles"),
 257          _("<b>Alt</b>: lock handle length; <b>Ctrl+Alt</b>: move along handles"));
 258 }
 259
 260 static gint
 261 sp_node_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 262 {
 263     gint ret = FALSE;
 264
 265     if (prefs_get_int_attribute ("tools.nodes", "pathflash_enabled", 0) == 1) {
 266         guint timeout = prefs_get_int_attribute("tools.nodes", "pathflash_timeout", 500);
 267         if (SP_IS_LPE_ITEM(item)) {
 268             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 269             if (lpe) {
 270                 if (lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH) {
 271                     // return if flash is suppressed or if we want a permanent "flash" (this is handled
 272                     // in sp_node_context_selection_changed()
 273                     return ret;
 274                 }
 275                 if (lpe->pathFlashType() == Inkscape::LivePathEffect::PERMANENT_FLASH) {
 276                     timeout = 0;
 277                 }
 278             }
 279         }
 280         sp_node_context_flash_path(event_context, item, timeout);
 281     }
 282
 283     if (((SPEventContextClass *) parent_class)->item_handler)
 284         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 285
 286     return ret;
 287 }
 288
 289 static gint
 290 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 291 {
 292     SPDesktop *desktop = event_context->desktop;
 293     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 294
 295     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 296     double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 297     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); // read every time, to make prefs changes really live
 298     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 299     double const offset = prefs_get_double_attribute_limited("options.defaultscale", "value", 2, 0, 1000);
 300
 301     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
 302         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 303         nc->flash_tempitem = NULL;
 304         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
 305     } else {
 306         nc->remove_flash_counter--;
 307     }
 308
 309     gint ret = FALSE;
 310     switch (event->type) {
 311         case GDK_BUTTON_PRESS:
 312             if (event->button.button == 1 && !event_context->space_panning) {
 313                 // save drag origin
 314                 event_context->xp = (gint) event->button.x;
 315                 event_context->yp = (gint) event->button.y;
 316                 event_context->within_tolerance = true;
 317                 nc->shape_editor->cancel_hit();
 318
 319                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 320                     if (!nc->drag) {
 321                         if (nc->shape_editor->has_nodepath() && selection->single() /* && item_over */) {
 322                             // save drag origin
 323                             bool over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), true);
 324                             //only dragging curves
 325                             if (over_stroke) {
 326                                 ret = TRUE;
 327                                 break;
 328                             }
 329                         }
 330                     }
 331                 }
 332                 NR::Point const button_w(event->button.x,
 333                                          event->button.y);
 334                 NR::Point const button_dt(desktop->w2d(button_w));
 335                 Inkscape::Rubberband::get()->start(desktop, button_dt);
 336                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 337                 desktop->updateNow();
 338                 ret = TRUE;
 339             }
 340             break;
 341         case GDK_MOTION_NOTIFY:
 342             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 343
 344                 if ( event_context->within_tolerance
 345                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 346                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 347                     break; // do not drag if we're within tolerance from origin
 348                 }
 349
 350                 // The path went away while dragging; throw away any further motion
 351                 // events until the mouse pointer is released.
 352
 353                 if (nc->shape_editor->hits_curve() && !nc->shape_editor->has_nodepath()) {
 354                   break;
 355                 }
 356
 357                 // Once the user has moved farther than tolerance from the original location
 358                 // (indicating they intend to move the object, not click), then always process the
 359                 // motion notify coordinates as given (no snapping back to origin)
 360                 event_context->within_tolerance = false;
 361
 362                 // Once we determine what the user is doing (dragging either a node or the
 363                 // selection rubberband), make sure we continue to perform that operation
 364                 // until the mouse pointer is lifted.
 365                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 366                     if (nc->shape_editor->hits_curve() && nc->shape_editor->has_nodepath()) {
 367                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 368                     } else {
 369                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 370                     }
 371                 }
 372
 373                 switch (nc->current_state) {
 374                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 375                         {
 376                             nc->shape_editor->curve_drag (event->motion.x, event->motion.y);
 377
 378                             gobble_motion_events(GDK_BUTTON1_MASK);
 379                             break;
 380                         }
 381                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 382                         if (Inkscape::Rubberband::get()->is_started()) {
 383                             NR::Point const motion_w(event->motion.x,
 384                                                 event->motion.y);
 385                             NR::Point const motion_dt(desktop->w2d(motion_w));
 386                             Inkscape::Rubberband::get()->move(motion_dt);
 387                         }
 388                         break;
 389                 }
 390
 391                 nc->drag = TRUE;
 392                 ret = TRUE;
 393             } else {
 394                 if (!nc->shape_editor->has_nodepath() || selection->singleItem() == NULL) {
 395                     break;
 396                 }
 397
 398                 bool over_stroke = false;
 399                 over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->motion.x, event->motion.y), false);
 400
 401                 if (nc->cursor_drag && !over_stroke) {
 402                     event_context->cursor_shape = cursor_node_xpm;
 403                     event_context->hot_x = 1;
 404                     event_context->hot_y = 1;
 405                     sp_event_context_update_cursor(event_context);
 406                     nc->cursor_drag = false;
 407                 } else if (!nc->cursor_drag && over_stroke) {
 408                     event_context->cursor_shape = cursor_node_d_xpm;
 409                     event_context->hot_x = 1;
 410                     event_context->hot_y = 1;
 411                     sp_event_context_update_cursor(event_context);
 412                     nc->cursor_drag = true;
 413                 }
 414             }
 415             break;
 416
 417         case GDK_2BUTTON_PRESS:
 418         case GDK_BUTTON_RELEASE:
 419             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 420                 // find out clicked item, disregarding groups, honoring Alt
 421                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 422                         NR::Point(event->button.x, event->button.y),
 423                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 424
 425                 event_context->xp = event_context->yp = 0;
 426
 427                 bool over_stroke = false;
 428                 if (nc->shape_editor->has_nodepath()) {
 429                     over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), false);
 430                 }
 431
 432                 if (item_clicked || over_stroke) {
 433                     if (over_stroke || nc->added_node) {
 434                         switch (event->type) {
 435                             case GDK_BUTTON_RELEASE:
 436                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 437                                     //add a node
 438                                     nc->shape_editor->add_node_near_point();
 439                                 } else {
 440                                     if (nc->added_node) { // we just received double click, ignore release
 441                                         nc->added_node = false;
 442                                         break;
 443                                     }
 444                                     //select the segment
 445                                     if (event->button.state & GDK_SHIFT_MASK) {
 446                                         nc->shape_editor->select_segment_near_point(true);
 447                                     } else {
 448                                         nc->shape_editor->select_segment_near_point(false);
 449                                     }
 450                                     desktop->updateNow();
 451                                 }
 452                                 break;
 453                             case GDK_2BUTTON_PRESS:
 454                                 //add a node
 455                                 nc->shape_editor->add_node_near_point();
 456                                 nc->added_node = true;
 457                                 break;
 458                             default:
 459                                 break;
 460                         }
 461                     } else if (event->button.state & GDK_SHIFT_MASK) {
 462                         selection->toggle(item_clicked);
 463                         desktop->updateNow();
 464                     } else {
 465                         selection->set(item_clicked);
 466                         desktop->updateNow();
 467                     }
 468                     Inkscape::Rubberband::get()->stop();
 469                     ret = TRUE;
 470                     break;
 471                 }
 472             }
 473             if (event->type == GDK_BUTTON_RELEASE) {
 474                 event_context->xp = event_context->yp = 0;
 475                 if (event->button.button == 1) {
 476                     NR::Maybe<NR::Rect> b = Inkscape::Rubberband::get()->getRectangle();
 477
 478                     if (nc->shape_editor->hits_curve() && !event_context->within_tolerance) { //drag curve
 479                         nc->shape_editor->finish_drag();
 480                     } else if (b && !event_context->within_tolerance) { // drag to select
 481                         nc->shape_editor->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 482                     } else {
 483                         if (!(nc->rb_escaped)) { // unless something was cancelled
 484                             if (nc->shape_editor->has_selection())
 485                                 nc->shape_editor->deselect();
 486                             else
 487                                 sp_desktop_selection(desktop)->clear();
 488                         }
 489                     }
 490                     ret = TRUE;
 491                     Inkscape::Rubberband::get()->stop();
 492                     desktop->updateNow();
 493                     nc->rb_escaped = false;
 494                     nc->drag = FALSE;
 495                     nc->shape_editor->cancel_hit();
 496                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 497                 }
 498             }
 499             break;
 500         case GDK_KEY_PRESS:
 501             switch (get_group0_keyval(&event->key)) {
 502                 case GDK_Insert:
 503                 case GDK_KP_Insert:
 504                     // with any modifiers
 505                     nc->shape_editor->add_node();
 506                     ret = TRUE;
 507                     break;
 508                 case GDK_Delete:
 509                 case GDK_KP_Delete:
 510                 case GDK_BackSpace:
 511                     if (MOD__CTRL_ONLY) {
 512                         nc->shape_editor->delete_nodes();
 513                     } else {
 514                         nc->shape_editor->delete_nodes_preserving_shape();
 515                     }
 516                     ret = TRUE;
 517                     break;
 518                 case GDK_C:
 519                 case GDK_c:
 520                     if (MOD__SHIFT_ONLY) {
 521                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_CUSP);
 522                         ret = TRUE;
 523                     }
 524                     break;
 525                 case GDK_S:
 526                 case GDK_s:
 527                     if (MOD__SHIFT_ONLY) {
 528                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 529                         ret = TRUE;
 530                     }
 531                     break;
 532                 case GDK_Y:
 533                 case GDK_y:
 534                     if (MOD__SHIFT_ONLY) {
 535                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SYMM);
 536                         ret = TRUE;
 537                     }
 538                     break;
 539                 case GDK_B:
 540                 case GDK_b:
 541                     if (MOD__SHIFT_ONLY) {
 542                         nc->shape_editor->break_at_nodes();
 543                         ret = TRUE;
 544                     }
 545                     break;
 546                 case GDK_J:
 547                 case GDK_j:
 548                     if (MOD__SHIFT_ONLY) {
 549                         nc->shape_editor->join_nodes();
 550                         ret = TRUE;
 551                     }
 552                     break;
 553                 case GDK_D:
 554                 case GDK_d:
 555                     if (MOD__SHIFT_ONLY) {
 556                         nc->shape_editor->duplicate_nodes();
 557                         ret = TRUE;
 558                     }
 559                     break;
 560                 case GDK_L:
 561                 case GDK_l:
 562                     if (MOD__SHIFT_ONLY) {
 563                         nc->shape_editor->set_type_of_segments(NR_LINETO);
 564                         ret = TRUE;
 565                     }
 566                     break;
 567                 case GDK_U:
 568                 case GDK_u:
 569                     if (MOD__SHIFT_ONLY) {
 570                         nc->shape_editor->set_type_of_segments(NR_CURVETO);
 571                         ret = TRUE;
 572                     }
 573                     break;
 574                 case GDK_R:
 575                 case GDK_r:
 576                     if (MOD__SHIFT_ONLY) {
 577                         // FIXME: add top panel button
 578                         sp_selected_path_reverse();
 579                         ret = TRUE;
 580                     }
 581                     break;
 582                 case GDK_x:
 583                 case GDK_X:
 584                     if (MOD__ALT_ONLY) {
 585                         desktop->setToolboxFocusTo ("altx-nodes");
 586                         ret = TRUE;
 587                     }
 588                     break;
 589                 case GDK_Left: // move selection left
 590                 case GDK_KP_Left:
 591                 case GDK_KP_4:
 592                     if (!MOD__CTRL) { // not ctrl
 593                         gint mul = 1 + gobble_key_events(
 594                             get_group0_keyval(&event->key), 0); // with any mask
 595                         if (MOD__ALT) { // alt
 596                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*-10, 0); // shift
 597                             else nc->shape_editor->move_nodes_screen(mul*-1, 0); // no shift
 598                         }
 599                         else { // no alt
 600                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*-10*nudge, 0); // shift
 601                             else nc->shape_editor->move_nodes(mul*-nudge, 0); // no shift
 602                         }
 603                         ret = TRUE;
 604                     }
 605                     break;
 606                 case GDK_Up: // move selection up
 607                 case GDK_KP_Up:
 608                 case GDK_KP_8:
 609                     if (!MOD__CTRL) { // not ctrl
 610                         gint mul = 1 + gobble_key_events(
 611                             get_group0_keyval(&event->key), 0); // with any mask
 612                         if (MOD__ALT) { // alt
 613                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*10); // shift
 614                             else nc->shape_editor->move_nodes_screen(0, mul*1); // no shift
 615                         }
 616                         else { // no alt
 617                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*10*nudge); // shift
 618                             else nc->shape_editor->move_nodes(0, mul*nudge); // no shift
 619                         }
 620                         ret = TRUE;
 621                     }
 622                     break;
 623                 case GDK_Right: // move selection right
 624                 case GDK_KP_Right:
 625                 case GDK_KP_6:
 626                     if (!MOD__CTRL) { // not ctrl
 627                         gint mul = 1 + gobble_key_events(
 628                             get_group0_keyval(&event->key), 0); // with any mask
 629                         if (MOD__ALT) { // alt
 630                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*10, 0); // shift
 631                             else nc->shape_editor->move_nodes_screen(mul*1, 0); // no shift
 632                         }
 633                         else { // no alt
 634                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*10*nudge, 0); // shift
 635                             else nc->shape_editor->move_nodes(mul*nudge, 0); // no shift
 636                         }
 637                         ret = TRUE;
 638                     }
 639                     break;
 640                 case GDK_Down: // move selection down
 641                 case GDK_KP_Down:
 642                 case GDK_KP_2:
 643                     if (!MOD__CTRL) { // not ctrl
 644                         gint mul = 1 + gobble_key_events(
 645                             get_group0_keyval(&event->key), 0); // with any mask
 646                         if (MOD__ALT) { // alt
 647                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*-10); // shift
 648                             else nc->shape_editor->move_nodes_screen(0, mul*-1); // no shift
 649                         }
 650                         else { // no alt
 651                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*-10*nudge); // shift
 652                             else nc->shape_editor->move_nodes(0, mul*-nudge); // no shift
 653                         }
 654                         ret = TRUE;
 655                     }
 656                     break;
 657                 case GDK_Escape:
 658                 {
 659                     NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 660                     if (b) {
 661                         Inkscape::Rubberband::get()->stop();
 662                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 663                         nc->rb_escaped = true;
 664                     } else {
 665                         if (nc->shape_editor->has_selection()) {
 666                             nc->shape_editor->deselect();
 667                         } else {
 668                             sp_desktop_selection(desktop)->clear();
 669                         }
 670                     }
 671                     ret = TRUE;
 672                     break;
 673                 }
 674
 675                 case GDK_bracketleft:
 676                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 677                         if (nc->leftctrl)
 678                             nc->shape_editor->rotate_nodes (M_PI/snaps, -1, false);
 679                         if (nc->rightctrl)
 680                             nc->shape_editor->rotate_nodes (M_PI/snaps, 1, false);
 681                     } else if ( MOD__ALT && !MOD__CTRL ) {
 682                         if (nc->leftalt && nc->rightalt)
 683                             nc->shape_editor->rotate_nodes (1, 0, true);
 684                         else {
 685                             if (nc->leftalt)
 686                                 nc->shape_editor->rotate_nodes (1, -1, true);
 687                             if (nc->rightalt)
 688                                 nc->shape_editor->rotate_nodes (1, 1, true);
 689                         }
 690                     } else if ( snaps != 0 ) {
 691                         nc->shape_editor->rotate_nodes (M_PI/snaps, 0, false);
 692                     }
 693                     ret = TRUE;
 694                     break;
 695                 case GDK_bracketright:
 696                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 697                         if (nc->leftctrl)
 698                             nc->shape_editor->rotate_nodes (-M_PI/snaps, -1, false);
 699                         if (nc->rightctrl)
 700                             nc->shape_editor->rotate_nodes (-M_PI/snaps, 1, false);
 701                     } else if ( MOD__ALT && !MOD__CTRL ) {
 702                         if (nc->leftalt && nc->rightalt)
 703                             nc->shape_editor->rotate_nodes (-1, 0, true);
 704                         else {
 705                             if (nc->leftalt)
 706                                 nc->shape_editor->rotate_nodes (-1, -1, true);
 707                             if (nc->rightalt)
 708                                 nc->shape_editor->rotate_nodes (-1, 1, true);
 709                         }
 710                     } else if ( snaps != 0 ) {
 711                         nc->shape_editor->rotate_nodes (-M_PI/snaps, 0, false);
 712                     }
 713                     ret = TRUE;
 714                     break;
 715                 case GDK_less:
 716                 case GDK_comma:
 717                     if (MOD__CTRL) {
 718                         if (nc->leftctrl)
 719                             nc->shape_editor->scale_nodes(-offset, -1);
 720                         if (nc->rightctrl)
 721                             nc->shape_editor->scale_nodes(-offset, 1);
 722                     } else if (MOD__ALT) {
 723                         if (nc->leftalt && nc->rightalt)
 724                             nc->shape_editor->scale_nodes_screen (-1, 0);
 725                         else {
 726                             if (nc->leftalt)
 727                                 nc->shape_editor->scale_nodes_screen (-1, -1);
 728                             if (nc->rightalt)
 729                                 nc->shape_editor->scale_nodes_screen (-1, 1);
 730                         }
 731                     } else {
 732                         nc->shape_editor->scale_nodes (-offset, 0);
 733                     }
 734                     ret = TRUE;
 735                     break;
 736                 case GDK_greater:
 737                 case GDK_period:
 738                     if (MOD__CTRL) {
 739                         if (nc->leftctrl)
 740                             nc->shape_editor->scale_nodes (offset, -1);
 741                         if (nc->rightctrl)
 742                             nc->shape_editor->scale_nodes (offset, 1);
 743                     } else if (MOD__ALT) {
 744                         if (nc->leftalt && nc->rightalt)
 745                             nc->shape_editor->scale_nodes_screen (1, 0);
 746                         else {
 747                             if (nc->leftalt)
 748                                 nc->shape_editor->scale_nodes_screen (1, -1);
 749                             if (nc->rightalt)
 750                                 nc->shape_editor->scale_nodes_screen (1, 1);
 751                         }
 752                     } else {
 753                         nc->shape_editor->scale_nodes (offset, 0);
 754                     }
 755                     ret = TRUE;
 756                     break;
 757
 758                 case GDK_Alt_L:
 759                     nc->leftalt = TRUE;
 760                     sp_node_context_show_modifier_tip(event_context, event);
 761                     break;
 762                 case GDK_Alt_R:
 763                     nc->rightalt = TRUE;
 764                     sp_node_context_show_modifier_tip(event_context, event);
 765                     break;
 766                 case GDK_Control_L:
 767                     nc->leftctrl = TRUE;
 768                     sp_node_context_show_modifier_tip(event_context, event);
 769                     break;
 770                 case GDK_Control_R:
 771                     nc->rightctrl = TRUE;
 772                     sp_node_context_show_modifier_tip(event_context, event);
 773                     break;
 774                 case GDK_Shift_L:
 775                 case GDK_Shift_R:
 776                 case GDK_Meta_L:
 777                 case GDK_Meta_R:
 778                     sp_node_context_show_modifier_tip(event_context, event);
 779                     break;
 780                 default:
 781                     ret = node_key(event);
 782                     break;
 783             }
 784             break;
 785         case GDK_KEY_RELEASE:
 786             switch (get_group0_keyval(&event->key)) {
 787                 case GDK_Alt_L:
 788                     nc->leftalt = FALSE;
 789                     event_context->defaultMessageContext()->clear();
 790                     break;
 791                 case GDK_Alt_R:
 792                     nc->rightalt = FALSE;
 793                     event_context->defaultMessageContext()->clear();
 794                     break;
 795                 case GDK_Control_L:
 796                     nc->leftctrl = FALSE;
 797                     event_context->defaultMessageContext()->clear();
 798                     break;
 799                 case GDK_Control_R:
 800                     nc->rightctrl = FALSE;
 801                     event_context->defaultMessageContext()->clear();
 802                     break;
 803                 case GDK_Shift_L:
 804                 case GDK_Shift_R:
 805                 case GDK_Meta_L:
 806                 case GDK_Meta_R:
 807                     event_context->defaultMessageContext()->clear();
 808                     break;
 809             }
 810             break;
 811         default:
 812             break;
 813     }
 814
 815     if (!ret) {
 816         if (((SPEventContextClass *) parent_class)->root_handler)
 817             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 818     }
 819
 820     return ret;
 821 }
 822
 823
 824 /*
 825   Local Variables:
 826   mode:c++
 827   c-file-style:"stroustrup"
 828   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 829   indent-tabs-mode:nil
 830   fill-column:99
 831   End:
 832 */
 833 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :