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