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 "preferences.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 ec->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     ec->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         ec->shape_editor->set_item(item, SH_NODEPATH);
 160         ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 161     }
 162
 163     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 164     if (prefs->getBool("/tools/nodes/selcue")) {
 165         ec->enableSelectionCue();
 166     }
 167     if (prefs->getBool("/tools/nodes/gradientdrag")) {
 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     ec->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 = sp_nodepath_generate_helperpath(desktop, item);
 193
 194         if (canvasitem) {
 195             nc->flash_tempitem = desktop->add_temporary_canvasitem (canvasitem, timeout);
 196         }
 197     }
 198 }
 199
 200 /**
 201 \brief  Callback that processes the "changed" signal on the selection;
 202 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
 203 */
 204 void
 205 sp_node_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 206 {
 207     SPEventContext *ec = SP_EVENT_CONTEXT(data);
 208
 209     // TODO: update ShapeEditorsCollective instead
 210     ec->shape_editor->unset_item(SH_NODEPATH);
 211     ec->shape_editor->unset_item(SH_KNOTHOLDER);
 212     SPItem *item = selection->singleItem();
 213     ec->shape_editor->set_item(item, SH_NODEPATH);
 214     ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 215     ec->shape_editor->update_statusbar();
 216 }
 217
 218 void
 219 sp_node_context_show_modifier_tip(SPEventContext *event_context, GdkEvent *event)
 220 {
 221     sp_event_show_modifier_tip
 222         (event_context->defaultMessageContext(), event,
 223          _("<b>Ctrl</b>: toggle node type, snap handle angle, move hor/vert; <b>Ctrl+Alt</b>: move along handles"),
 224          _("<b>Shift</b>: toggle node selection, disable snapping, rotate both handles"),
 225          _("<b>Alt</b>: lock handle length; <b>Ctrl+Alt</b>: move along handles"));
 226 }
 227
 228 static gint
 229 sp_node_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 230 {
 231     gint ret = FALSE;
 232     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 233
 234     if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
 235         if (prefs->getBool("/tools/nodes/pathflash_unselected")) {
 236             SPDesktop *desktop = event_context->desktop;
 237             ShapeEditor* se = event_context->shape_editor;
 238             Inkscape::Selection *selection = sp_desktop_selection (desktop);
 239             if (se->has_nodepath() && selection->singleItem()) {
 240                 return ret;
 241             }
 242         }
 243         if (SP_IS_LPE_ITEM(item)) {
 244             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 245             if (lpe && (lpe->providesOwnFlashPaths() ||
 246                         lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH)) {
 247                 // path should be suppressed or permanent; this is handled in
 248                 // sp_node_context_selection_changed()
 249                 return ret;
 250             }
 251         }
 252         guint timeout = prefs->getInt("/tools/nodes/pathflash_timeout", 500);
 253         sp_node_context_flash_path(event_context, item, timeout);
 254     }
 255
 256     if (((SPEventContextClass *) parent_class)->item_handler)
 257         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 258
 259     return ret;
 260 }
 261
 262 static gint
 263 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 264 {
 265     SPDesktop *desktop = event_context->desktop;
 266     ShapeEditor* se = event_context->shape_editor;
 267     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 268     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 269
 270     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 271     double const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000); // in px
 272     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); // read every time, to make prefs changes really live
 273     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 274     double const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000);
 275
 276     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
 277         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 278         nc->flash_tempitem = NULL;
 279         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
 280     } else {
 281         nc->remove_flash_counter--;
 282     }
 283
 284     sp_event_context_snap_window_open(event_context, false); // Just put the snap window open, bluntly. Will be closed when we have left the context
 285
 286     gint ret = FALSE;
 287     switch (event->type) {
 288         case GDK_BUTTON_PRESS:
 289             if (event->button.button == 1 && !event_context->space_panning) {
 290                 // save drag origin
 291                 event_context->xp = (gint) event->button.x;
 292                 event_context->yp = (gint) event->button.y;
 293                 event_context->within_tolerance = true;
 294                 se->cancel_hit();
 295
 296                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 297                     if (!nc->drag) {
 298                         if (se->has_nodepath() && selection->single() /* && item_over */) {
 299                                 // save drag origin
 300                             bool over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), true);
 301                             //only dragging curves
 302                             if (over_stroke) {
 303                                 ret = TRUE;
 304                                 break;
 305                             }
 306                         }
 307                     }
 308                 }
 309                 Geom::Point const button_w(event->button.x,
 310                                          event->button.y);
 311                 Geom::Point const button_dt(desktop->w2d(button_w));
 312                 Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
 313                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 314                 desktop->updateNow();
 315                 ret = TRUE;
 316             }
 317             break;
 318         case GDK_MOTION_NOTIFY:
 319             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 320
 321                 if ( event_context->within_tolerance
 322                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 323                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 324                     break; // do not drag if we're within tolerance from origin
 325                 }
 326
 327                 // The path went away while dragging; throw away any further motion
 328                 // events until the mouse pointer is released.
 329
 330                 if (se->hits_curve() && !se->has_nodepath()) {
 331                   break;
 332                 }
 333
 334                 // Once the user has moved farther than tolerance from the original location
 335                 // (indicating they intend to move the object, not click), then always process the
 336                 // motion notify coordinates as given (no snapping back to origin)
 337                 event_context->within_tolerance = false;
 338
 339                 // Once we determine what the user is doing (dragging either a node or the
 340                 // selection rubberband), make sure we continue to perform that operation
 341                 // until the mouse pointer is lifted.
 342                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 343                     if (se->hits_curve() && se->has_nodepath()) {
 344                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 345                     } else {
 346                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 347                     }
 348                 }
 349
 350                 switch (nc->current_state) {
 351                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 352                         {
 353                             se->curve_drag (event->motion.x, event->motion.y);
 354
 355                             gobble_motion_events(GDK_BUTTON1_MASK);
 356                             break;
 357                         }
 358                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 359                         if (Inkscape::Rubberband::get(desktop)->is_started()) {
 360                             Geom::Point const motion_w(event->motion.x,
 361                                                 event->motion.y);
 362                             Geom::Point const motion_dt(desktop->w2d(motion_w));
 363                             Inkscape::Rubberband::get(desktop)->move(motion_dt);
 364                         }
 365                         break;
 366                 }
 367
 368                 nc->drag = TRUE;
 369                 ret = TRUE;
 370             } else {
 371                 if (!se->has_nodepath() || selection->singleItem() == NULL) {
 372                     break;
 373                 }
 374
 375                 bool over_stroke = false;
 376                 over_stroke = se->is_over_stroke(Geom::Point(event->motion.x, event->motion.y), false);
 377
 378                 if (nc->cursor_drag && !over_stroke) {
 379                     event_context->cursor_shape = cursor_node_xpm;
 380                     event_context->hot_x = 1;
 381                     event_context->hot_y = 1;
 382                     sp_event_context_update_cursor(event_context);
 383                     nc->cursor_drag = false;
 384                 } else if (!nc->cursor_drag && over_stroke) {
 385                     event_context->cursor_shape = cursor_node_d_xpm;
 386                     event_context->hot_x = 1;
 387                     event_context->hot_y = 1;
 388                     sp_event_context_update_cursor(event_context);
 389                     nc->cursor_drag = true;
 390                 }
 391             }
 392             break;
 393
 394         case GDK_2BUTTON_PRESS:
 395         case GDK_BUTTON_RELEASE:
 396             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 397                 // find out clicked item, disregarding groups, honoring Alt
 398                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 399                         Geom::Point(event->button.x, event->button.y),
 400                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 401
 402                 event_context->xp = event_context->yp = 0;
 403
 404                 bool over_stroke = false;
 405                 if (se->has_nodepath()) {
 406                     over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), false);
 407                 }
 408
 409                 if (item_clicked || over_stroke) {
 410                     if (over_stroke || nc->added_node) {
 411                         switch (event->type) {
 412                             case GDK_BUTTON_RELEASE:
 413                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 414                                     //add a node
 415                                     se->add_node_near_point();
 416                                 } else {
 417                                     if (nc->added_node) { // we just received double click, ignore release
 418                                         nc->added_node = false;
 419                                         break;
 420                                     }
 421                                     //select the segment
 422                                     if (event->button.state & GDK_SHIFT_MASK) {
 423                                         se->select_segment_near_point(true);
 424                                     } else {
 425                                         se->select_segment_near_point(false);
 426                                     }
 427                                     desktop->updateNow();
 428                                 }
 429                                 break;
 430                             case GDK_2BUTTON_PRESS:
 431                                 //add a node
 432                                 se->add_node_near_point();
 433                                 nc->added_node = true;
 434                                 break;
 435                             default:
 436                                 break;
 437                         }
 438                     } else if (event->button.state & GDK_SHIFT_MASK) {
 439                         selection->toggle(item_clicked);
 440                         desktop->updateNow();
 441                     } else {
 442                         selection->set(item_clicked);
 443                         desktop->updateNow();
 444                     }
 445                     Inkscape::Rubberband::get(desktop)->stop();
 446                     ret = TRUE;
 447                     break;
 448                 }
 449             }
 450             if (event->type == GDK_BUTTON_RELEASE) {
 451                 event_context->xp = event_context->yp = 0;
 452                 if (event->button.button == 1) {
 453                         Geom::OptRect b = Inkscape::Rubberband::get(desktop)->getRectangle();
 454
 455                     if (se->hits_curve() && !event_context->within_tolerance) { //drag curve
 456                         se->finish_drag();
 457                     } else if (b && !event_context->within_tolerance) { // drag to select
 458                         se->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 459                     } else {
 460                         if (!(nc->rb_escaped)) { // unless something was canceled
 461                             if (se->has_selection())
 462                                 se->deselect();
 463                             else
 464                                 sp_desktop_selection(desktop)->clear();
 465                         }
 466                     }
 467                     ret = TRUE;
 468                     Inkscape::Rubberband::get(desktop)->stop();
 469                     desktop->updateNow();
 470                     nc->rb_escaped = false;
 471                     nc->drag = FALSE;
 472                     se->cancel_hit();
 473                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 474                 }
 475             }
 476             break;
 477         case GDK_KEY_PRESS:
 478             switch (get_group0_keyval(&event->key)) {
 479                 case GDK_Insert:
 480                 case GDK_KP_Insert:
 481                     // with any modifiers
 482                     se->add_node();
 483                     ret = TRUE;
 484                     break;
 485                 case GDK_I:
 486                 case GDK_i:
 487                     // apple keyboards have no Insert
 488                     if (MOD__SHIFT_ONLY) {
 489                         se->add_node();
 490                         ret = TRUE;
 491                     }
 492                     break;
 493                 case GDK_Delete:
 494                 case GDK_KP_Delete:
 495                 case GDK_BackSpace:
 496                     if (MOD__CTRL_ONLY) {
 497                         se->delete_nodes();
 498                     } else {
 499                         se->delete_nodes_preserving_shape();
 500                     }
 501                     ret = TRUE;
 502                     break;
 503                 case GDK_C:
 504                 case GDK_c:
 505                     if (MOD__SHIFT_ONLY) {
 506                         se->set_node_type(Inkscape::NodePath::NODE_CUSP);
 507                         ret = TRUE;
 508                     }
 509                     break;
 510                 case GDK_S:
 511                 case GDK_s:
 512                     if (MOD__SHIFT_ONLY) {
 513                         se->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 514                         ret = TRUE;
 515                     }
 516                     break;
 517                 case GDK_A:
 518                 case GDK_a:
 519                     if (MOD__SHIFT_ONLY) {
 520                         se->set_node_type(Inkscape::NodePath::NODE_AUTO);
 521                         ret = TRUE;
 522                     }
 523                     break;
 524                 case GDK_Y:
 525                 case GDK_y:
 526                     if (MOD__SHIFT_ONLY) {
 527                         se->set_node_type(Inkscape::NodePath::NODE_SYMM);
 528                         ret = TRUE;
 529                     }
 530                     break;
 531                 case GDK_B:
 532                 case GDK_b:
 533                     if (MOD__SHIFT_ONLY) {
 534                         se->break_at_nodes();
 535                         ret = TRUE;
 536                     }
 537                     break;
 538                 case GDK_J:
 539                 case GDK_j:
 540                     if (MOD__SHIFT_ONLY) {
 541                         se->join_nodes();
 542                         ret = TRUE;
 543                     }
 544                     break;
 545                 case GDK_D:
 546                 case GDK_d:
 547                     if (MOD__SHIFT_ONLY) {
 548                         se->duplicate_nodes();
 549                         ret = TRUE;
 550                     }
 551                     break;
 552                 case GDK_L:
 553                 case GDK_l:
 554                     if (MOD__SHIFT_ONLY) {
 555                         se->set_type_of_segments(NR_LINETO);
 556                         ret = TRUE;
 557                     }
 558                     break;
 559                 case GDK_U:
 560                 case GDK_u:
 561                     if (MOD__SHIFT_ONLY) {
 562                         se->set_type_of_segments(NR_CURVETO);
 563                         ret = TRUE;
 564                     }
 565                     break;
 566                 case GDK_R:
 567                 case GDK_r:
 568                     if (MOD__SHIFT_ONLY) {
 569                         // FIXME: add top panel button
 570                         sp_selected_path_reverse(desktop);
 571                         ret = TRUE;
 572                     }
 573                     break;
 574                 case GDK_x:
 575                 case GDK_X:
 576                     if (MOD__ALT_ONLY) {
 577                         desktop->setToolboxFocusTo ("altx-nodes");
 578                         ret = TRUE;
 579                     }
 580                     break;
 581                 case GDK_Left: // move selection left
 582                 case GDK_KP_Left:
 583                 case GDK_KP_4:
 584                     if (!MOD__CTRL) { // not ctrl
 585                         gint mul = 1 + gobble_key_events(
 586                             get_group0_keyval(&event->key), 0); // with any mask
 587                         if (MOD__ALT) { // alt
 588                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*-10, 0); // shift
 589                             else se->move_nodes_screen(desktop, mul*-1, 0); // no shift
 590                         }
 591                         else { // no alt
 592                             if (MOD__SHIFT) se->move_nodes(mul*-10*nudge, 0); // shift
 593                             else se->move_nodes(mul*-nudge, 0); // no shift
 594                         }
 595                         ret = TRUE;
 596                     }
 597                     break;
 598                 case GDK_Up: // move selection up
 599                 case GDK_KP_Up:
 600                 case GDK_KP_8:
 601                     if (!MOD__CTRL) { // not ctrl
 602                         gint mul = 1 + gobble_key_events(
 603                             get_group0_keyval(&event->key), 0); // with any mask
 604                         if (MOD__ALT) { // alt
 605                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*10); // shift
 606                             else se->move_nodes_screen(desktop, 0, mul*1); // no shift
 607                         }
 608                         else { // no alt
 609                             if (MOD__SHIFT) se->move_nodes(0, mul*10*nudge); // shift
 610                             else se->move_nodes(0, mul*nudge); // no shift
 611                         }
 612                         ret = TRUE;
 613                     }
 614                     break;
 615                 case GDK_Right: // move selection right
 616                 case GDK_KP_Right:
 617                 case GDK_KP_6:
 618                     if (!MOD__CTRL) { // not ctrl
 619                         gint mul = 1 + gobble_key_events(
 620                             get_group0_keyval(&event->key), 0); // with any mask
 621                         if (MOD__ALT) { // alt
 622                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*10, 0); // shift
 623                             else se->move_nodes_screen(desktop, mul*1, 0); // no shift
 624                         }
 625                         else { // no alt
 626                             if (MOD__SHIFT) se->move_nodes(mul*10*nudge, 0); // shift
 627                             else se->move_nodes(mul*nudge, 0); // no shift
 628                         }
 629                         ret = TRUE;
 630                     }
 631                     break;
 632                 case GDK_Down: // move selection down
 633                 case GDK_KP_Down:
 634                 case GDK_KP_2:
 635                     if (!MOD__CTRL) { // not ctrl
 636                         gint mul = 1 + gobble_key_events(
 637                             get_group0_keyval(&event->key), 0); // with any mask
 638                         if (MOD__ALT) { // alt
 639                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*-10); // shift
 640                             else se->move_nodes_screen(desktop, 0, mul*-1); // no shift
 641                         }
 642                         else { // no alt
 643                             if (MOD__SHIFT) se->move_nodes(0, mul*-10*nudge); // shift
 644                             else se->move_nodes(0, mul*-nudge); // no shift
 645                         }
 646                         ret = TRUE;
 647                     }
 648                     break;
 649                 case GDK_Escape:
 650                 {
 651                     Geom::OptRect const b = Inkscape::Rubberband::get(desktop)->getRectangle();
 652                     if (b) {
 653                         Inkscape::Rubberband::get(desktop)->stop();
 654                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 655                         nc->rb_escaped = true;
 656                     } else {
 657                         if (se->has_selection()) {
 658                             se->deselect();
 659                         } else {
 660                             sp_desktop_selection(desktop)->clear();
 661                         }
 662                     }
 663                     ret = TRUE;
 664                     break;
 665                 }
 666
 667                 case GDK_bracketleft:
 668                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 669                         if (nc->leftctrl)
 670                             se->rotate_nodes (M_PI/snaps, -1, false);
 671                         if (nc->rightctrl)
 672                             se->rotate_nodes (M_PI/snaps, 1, false);
 673                     } else if ( MOD__ALT && !MOD__CTRL ) {
 674                         if (nc->leftalt && nc->rightalt)
 675                             se->rotate_nodes (1, 0, true);
 676                         else {
 677                             if (nc->leftalt)
 678                                 se->rotate_nodes (1, -1, true);
 679                             if (nc->rightalt)
 680                                 se->rotate_nodes (1, 1, true);
 681                         }
 682                     } else if ( snaps != 0 ) {
 683                         se->rotate_nodes (M_PI/snaps, 0, false);
 684                     }
 685                     ret = TRUE;
 686                     break;
 687                 case GDK_bracketright:
 688                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 689                         if (nc->leftctrl)
 690                             se->rotate_nodes (-M_PI/snaps, -1, false);
 691                         if (nc->rightctrl)
 692                             se->rotate_nodes (-M_PI/snaps, 1, false);
 693                     } else if ( MOD__ALT && !MOD__CTRL ) {
 694                         if (nc->leftalt && nc->rightalt)
 695                             se->rotate_nodes (-1, 0, true);
 696                         else {
 697                             if (nc->leftalt)
 698                                 se->rotate_nodes (-1, -1, true);
 699                             if (nc->rightalt)
 700                                 se->rotate_nodes (-1, 1, true);
 701                         }
 702                     } else if ( snaps != 0 ) {
 703                         se->rotate_nodes (-M_PI/snaps, 0, false);
 704                     }
 705                     ret = TRUE;
 706                     break;
 707                 case GDK_less:
 708                 case GDK_comma:
 709                     if (MOD__CTRL) {
 710                         if (nc->leftctrl)
 711                             se->scale_nodes(-offset, -1);
 712                         if (nc->rightctrl)
 713                             se->scale_nodes(-offset, 1);
 714                     } else if (MOD__ALT) {
 715                         if (nc->leftalt && nc->rightalt)
 716                             se->scale_nodes_screen (-1, 0);
 717                         else {
 718                             if (nc->leftalt)
 719                                 se->scale_nodes_screen (-1, -1);
 720                             if (nc->rightalt)
 721                                 se->scale_nodes_screen (-1, 1);
 722                         }
 723                     } else {
 724                         se->scale_nodes (-offset, 0);
 725                     }
 726                     ret = TRUE;
 727                     break;
 728                 case GDK_greater:
 729                 case GDK_period:
 730                     if (MOD__CTRL) {
 731                         if (nc->leftctrl)
 732                             se->scale_nodes (offset, -1);
 733                         if (nc->rightctrl)
 734                             se->scale_nodes (offset, 1);
 735                     } else if (MOD__ALT) {
 736                         if (nc->leftalt && nc->rightalt)
 737                             se->scale_nodes_screen (1, 0);
 738                         else {
 739                             if (nc->leftalt)
 740                                 se->scale_nodes_screen (1, -1);
 741                             if (nc->rightalt)
 742                                 se->scale_nodes_screen (1, 1);
 743                         }
 744                     } else {
 745                         se->scale_nodes (offset, 0);
 746                     }
 747                     ret = TRUE;
 748                     break;
 749
 750                 case GDK_Alt_L:
 751                     nc->leftalt = TRUE;
 752                     sp_node_context_show_modifier_tip(event_context, event);
 753                     break;
 754                 case GDK_Alt_R:
 755                     nc->rightalt = TRUE;
 756                     sp_node_context_show_modifier_tip(event_context, event);
 757                     break;
 758                 case GDK_Control_L:
 759                     nc->leftctrl = TRUE;
 760                     sp_node_context_show_modifier_tip(event_context, event);
 761                     break;
 762                 case GDK_Control_R:
 763                     nc->rightctrl = TRUE;
 764                     sp_node_context_show_modifier_tip(event_context, event);
 765                     break;
 766                 case GDK_Shift_L:
 767                 case GDK_Shift_R:
 768                 case GDK_Meta_L:
 769                 case GDK_Meta_R:
 770                     sp_node_context_show_modifier_tip(event_context, event);
 771                     break;
 772                 default:
 773                     ret = node_key(event);
 774                     break;
 775             }
 776             break;
 777         case GDK_KEY_RELEASE:
 778             switch (get_group0_keyval(&event->key)) {
 779                 case GDK_Alt_L:
 780                     nc->leftalt = FALSE;
 781                     event_context->defaultMessageContext()->clear();
 782                     break;
 783                 case GDK_Alt_R:
 784                     nc->rightalt = FALSE;
 785                     event_context->defaultMessageContext()->clear();
 786                     break;
 787                 case GDK_Control_L:
 788                     nc->leftctrl = FALSE;
 789                     event_context->defaultMessageContext()->clear();
 790                     break;
 791                 case GDK_Control_R:
 792                     nc->rightctrl = FALSE;
 793                     event_context->defaultMessageContext()->clear();
 794                     break;
 795                 case GDK_Shift_L:
 796                 case GDK_Shift_R:
 797                 case GDK_Meta_L:
 798                 case GDK_Meta_R:
 799                     event_context->defaultMessageContext()->clear();
 800                     break;
 801             }
 802             break;
 803         default:
 804             break;
 805     }
 806
 807     if (!ret) {
 808         if (((SPEventContextClass *) parent_class)->root_handler)
 809             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 810     }
 811
 812     return ret;
 813 }
 814
 815
 816 /*
 817   Local Variables:
 818   mode:c++
 819   c-file-style:"stroustrup"
 820   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 821   indent-tabs-mode:nil
 822   fill-column:99
 823   End:
 824 */
 825 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :