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