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