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     SPDesktop *desktop = event_context->desktop;
 234
 235     switch (event->type) {
 236         case GDK_MOTION_NOTIFY:
 237         {
 238             // find out actual item we're over, disregarding groups
 239             SPItem *actual_item = sp_event_context_find_item (desktop,
 240                                                               Geom::Point(event->button.x, event->button.y), FALSE, TRUE);
 241             if (!actual_item)
 242                 break;
 243
 244
 245             if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
 246                 if (prefs->getBool("/tools/nodes/pathflash_unselected")) {
 247                     // do not flash if we have some path selected and a single item in selection (i.e. it
 248                     // is the same path that we're editing)
 249                     SPDesktop *desktop = event_context->desktop;
 250                     ShapeEditor* se = event_context->shape_editor;
 251                     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 252                     if (se->has_nodepath() && selection->singleItem()) {
 253                         break;
 254                     }
 255                 }
 256                 if (SP_IS_LPE_ITEM(actual_item)) {
 257                     Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(actual_item));
 258                     if (lpe && (lpe->providesOwnFlashPaths() ||
 259                                 lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH)) {
 260                         // path should be suppressed or permanent; this is handled in
 261                         // sp_node_context_selection_changed()
 262                         break;
 263                     }
 264                 }
 265                 guint timeout = prefs->getInt("/tools/nodes/pathflash_timeout", 500);
 266                 sp_node_context_flash_path(event_context, actual_item, timeout);
 267             }
 268         }
 269         break;
 270
 271         default:
 272             break;
 273     }
 274
 275     if (((SPEventContextClass *) parent_class)->item_handler)
 276         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 277
 278     return ret;
 279 }
 280
 281 static gint
 282 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 283 {
 284     SPDesktop *desktop = event_context->desktop;
 285     ShapeEditor* se = event_context->shape_editor;
 286     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 287     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 288
 289     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 290     double const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000); // in px
 291     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); // read every time, to make prefs changes really live
 292     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 293     double const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000);
 294
 295     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
 296         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 297         nc->flash_tempitem = NULL;
 298         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
 299     } else {
 300         nc->remove_flash_counter--;
 301     }
 302
 303     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
 304
 305     gint ret = FALSE;
 306     switch (event->type) {
 307         case GDK_BUTTON_PRESS:
 308             if (event->button.button == 1 && !event_context->space_panning) {
 309                 // save drag origin
 310                 event_context->xp = (gint) event->button.x;
 311                 event_context->yp = (gint) event->button.y;
 312                 event_context->within_tolerance = true;
 313                 se->cancel_hit();
 314
 315                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 316                     if (!nc->drag) {
 317                         if (se->has_nodepath() && selection->single() /* && item_over */) {
 318                                 // save drag origin
 319                             bool over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), true);
 320                             //only dragging curves
 321                             if (over_stroke) {
 322                                 ret = TRUE;
 323                                 break;
 324                             }
 325                         }
 326                     }
 327                 }
 328                 Geom::Point const button_w(event->button.x,
 329                                          event->button.y);
 330                 Geom::Point const button_dt(desktop->w2d(button_w));
 331                 Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
 332                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 333                 desktop->updateNow();
 334                 ret = TRUE;
 335             }
 336             break;
 337         case GDK_MOTION_NOTIFY:
 338             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 339
 340                 if ( event_context->within_tolerance
 341                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 342                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 343                     break; // do not drag if we're within tolerance from origin
 344                 }
 345
 346                 // The path went away while dragging; throw away any further motion
 347                 // events until the mouse pointer is released.
 348
 349                 if (se->hits_curve() && !se->has_nodepath()) {
 350                   break;
 351                 }
 352
 353                 // Once the user has moved farther than tolerance from the original location
 354                 // (indicating they intend to move the object, not click), then always process the
 355                 // motion notify coordinates as given (no snapping back to origin)
 356                 event_context->within_tolerance = false;
 357
 358                 // Once we determine what the user is doing (dragging either a node or the
 359                 // selection rubberband), make sure we continue to perform that operation
 360                 // until the mouse pointer is lifted.
 361                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 362                     if (se->hits_curve() && se->has_nodepath()) {
 363                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 364                     } else {
 365                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 366                     }
 367                 }
 368
 369                 switch (nc->current_state) {
 370                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 371                         {
 372                             se->curve_drag (event->motion.x, event->motion.y);
 373
 374                             gobble_motion_events(GDK_BUTTON1_MASK);
 375                             break;
 376                         }
 377                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 378                         if (Inkscape::Rubberband::get(desktop)->is_started()) {
 379                             Geom::Point const motion_w(event->motion.x,
 380                                                 event->motion.y);
 381                             Geom::Point const motion_dt(desktop->w2d(motion_w));
 382                             Inkscape::Rubberband::get(desktop)->move(motion_dt);
 383                         }
 384                         break;
 385                 }
 386
 387                 nc->drag = TRUE;
 388                 ret = TRUE;
 389             } else {
 390                 if (!se->has_nodepath() || selection->singleItem() == NULL) {
 391                     break;
 392                 }
 393
 394                 bool over_stroke = false;
 395                 over_stroke = se->is_over_stroke(Geom::Point(event->motion.x, event->motion.y), false);
 396
 397                 if (nc->cursor_drag && !over_stroke) {
 398                     event_context->cursor_shape = cursor_node_xpm;
 399                     event_context->hot_x = 1;
 400                     event_context->hot_y = 1;
 401                     sp_event_context_update_cursor(event_context);
 402                     nc->cursor_drag = false;
 403                 } else if (!nc->cursor_drag && over_stroke) {
 404                     event_context->cursor_shape = cursor_node_d_xpm;
 405                     event_context->hot_x = 1;
 406                     event_context->hot_y = 1;
 407                     sp_event_context_update_cursor(event_context);
 408                     nc->cursor_drag = true;
 409                 }
 410             }
 411             break;
 412
 413         case GDK_2BUTTON_PRESS:
 414         case GDK_BUTTON_RELEASE:
 415             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 416                 // find out clicked item, disregarding groups, honoring Alt
 417                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 418                         Geom::Point(event->button.x, event->button.y),
 419                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 420
 421                 event_context->xp = event_context->yp = 0;
 422
 423                 bool over_stroke = false;
 424                 if (se->has_nodepath()) {
 425                     over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), false);
 426                 }
 427
 428                 if (item_clicked || over_stroke) {
 429                     if (over_stroke || nc->added_node) {
 430                         switch (event->type) {
 431                             case GDK_BUTTON_RELEASE:
 432                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 433                                     //add a node
 434                                     se->add_node_near_point();
 435                                 } else {
 436                                     if (nc->added_node) { // we just received double click, ignore release
 437                                         nc->added_node = false;
 438                                         break;
 439                                     }
 440                                     //select the segment
 441                                     if (event->button.state & GDK_SHIFT_MASK) {
 442                                         se->select_segment_near_point(true);
 443                                     } else {
 444                                         se->select_segment_near_point(false);
 445                                     }
 446                                     desktop->updateNow();
 447                                 }
 448                                 break;
 449                             case GDK_2BUTTON_PRESS:
 450                                 //add a node
 451                                 se->add_node_near_point();
 452                                 nc->added_node = true;
 453                                 break;
 454                             default:
 455                                 break;
 456                         }
 457                     } else if (event->button.state & GDK_SHIFT_MASK) {
 458                         selection->toggle(item_clicked);
 459                         desktop->updateNow();
 460                     } else {
 461                         selection->set(item_clicked);
 462                         desktop->updateNow();
 463                     }
 464                     Inkscape::Rubberband::get(desktop)->stop();
 465                     ret = TRUE;
 466                     break;
 467                 }
 468             }
 469             if (event->type == GDK_BUTTON_RELEASE) {
 470                 event_context->xp = event_context->yp = 0;
 471                 if (event->button.button == 1) {
 472                         Geom::OptRect b = Inkscape::Rubberband::get(desktop)->getRectangle();
 473
 474                     if (se->hits_curve() && !event_context->within_tolerance) { //drag curve
 475                         se->finish_drag();
 476                     } else if (b && !event_context->within_tolerance) { // drag to select
 477                         se->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 478                     } else {
 479                         if (!(nc->rb_escaped)) { // unless something was canceled
 480                             if (se->has_selection())
 481                                 se->deselect();
 482                             else
 483                                 sp_desktop_selection(desktop)->clear();
 484                         }
 485                     }
 486                     ret = TRUE;
 487                     Inkscape::Rubberband::get(desktop)->stop();
 488                     desktop->updateNow();
 489                     nc->rb_escaped = false;
 490                     nc->drag = FALSE;
 491                     se->cancel_hit();
 492                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 493                 }
 494             }
 495             break;
 496         case GDK_KEY_PRESS:
 497             switch (get_group0_keyval(&event->key)) {
 498                 case GDK_Insert:
 499                 case GDK_KP_Insert:
 500                     // with any modifiers
 501                     se->add_node();
 502                     ret = TRUE;
 503                     break;
 504                 case GDK_I:
 505                 case GDK_i:
 506                     // apple keyboards have no Insert
 507                     if (MOD__SHIFT_ONLY) {
 508                         se->add_node();
 509                         ret = TRUE;
 510                     }
 511                     break;
 512                 case GDK_Delete:
 513                 case GDK_KP_Delete:
 514                 case GDK_BackSpace:
 515                     if (MOD__CTRL_ONLY) {
 516                         se->delete_nodes();
 517                     } else {
 518                         se->delete_nodes_preserving_shape();
 519                     }
 520                     ret = TRUE;
 521                     break;
 522                 case GDK_C:
 523                 case GDK_c:
 524                     if (MOD__SHIFT_ONLY) {
 525                         se->set_node_type(Inkscape::NodePath::NODE_CUSP);
 526                         ret = TRUE;
 527                     }
 528                     break;
 529                 case GDK_S:
 530                 case GDK_s:
 531                     if (MOD__SHIFT_ONLY) {
 532                         se->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 533                         ret = TRUE;
 534                     }
 535                     break;
 536                 case GDK_A:
 537                 case GDK_a:
 538                     if (MOD__SHIFT_ONLY) {
 539                         se->set_node_type(Inkscape::NodePath::NODE_AUTO);
 540                         ret = TRUE;
 541                     }
 542                     break;
 543                 case GDK_Y:
 544                 case GDK_y:
 545                     if (MOD__SHIFT_ONLY) {
 546                         se->set_node_type(Inkscape::NodePath::NODE_SYMM);
 547                         ret = TRUE;
 548                     }
 549                     break;
 550                 case GDK_B:
 551                 case GDK_b:
 552                     if (MOD__SHIFT_ONLY) {
 553                         se->break_at_nodes();
 554                         ret = TRUE;
 555                     }
 556                     break;
 557                 case GDK_J:
 558                 case GDK_j:
 559                     if (MOD__SHIFT_ONLY) {
 560                         se->join_nodes();
 561                         ret = TRUE;
 562                     }
 563                     break;
 564                 case GDK_D:
 565                 case GDK_d:
 566                     if (MOD__SHIFT_ONLY) {
 567                         se->duplicate_nodes();
 568                         ret = TRUE;
 569                     }
 570                     break;
 571                 case GDK_L:
 572                 case GDK_l:
 573                     if (MOD__SHIFT_ONLY) {
 574                         se->set_type_of_segments(NR_LINETO);
 575                         ret = TRUE;
 576                     }
 577                     break;
 578                 case GDK_U:
 579                 case GDK_u:
 580                     if (MOD__SHIFT_ONLY) {
 581                         se->set_type_of_segments(NR_CURVETO);
 582                         ret = TRUE;
 583                     }
 584                     break;
 585                 case GDK_R:
 586                 case GDK_r:
 587                     if (MOD__SHIFT_ONLY) {
 588                         // FIXME: add top panel button
 589                         sp_selected_path_reverse(desktop);
 590                         ret = TRUE;
 591                     }
 592                     break;
 593                 case GDK_x:
 594                 case GDK_X:
 595                     if (MOD__ALT_ONLY) {
 596                         desktop->setToolboxFocusTo ("altx-nodes");
 597                         ret = TRUE;
 598                     }
 599                     break;
 600                 case GDK_Left: // move selection left
 601                 case GDK_KP_Left:
 602                 case GDK_KP_4:
 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, mul*-10, 0); // shift
 608                             else se->move_nodes_screen(desktop, mul*-1, 0); // no shift
 609                         }
 610                         else { // no alt
 611                             if (MOD__SHIFT) se->move_nodes(mul*-10*nudge, 0); // shift
 612                             else se->move_nodes(mul*-nudge, 0); // no shift
 613                         }
 614                         ret = TRUE;
 615                     }
 616                     break;
 617                 case GDK_Up: // move selection up
 618                 case GDK_KP_Up:
 619                 case GDK_KP_8:
 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, 0, mul*10); // shift
 625                             else se->move_nodes_screen(desktop, 0, mul*1); // no shift
 626                         }
 627                         else { // no alt
 628                             if (MOD__SHIFT) se->move_nodes(0, mul*10*nudge); // shift
 629                             else se->move_nodes(0, mul*nudge); // no shift
 630                         }
 631                         ret = TRUE;
 632                     }
 633                     break;
 634                 case GDK_Right: // move selection right
 635                 case GDK_KP_Right:
 636                 case GDK_KP_6:
 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, mul*10, 0); // shift
 642                             else se->move_nodes_screen(desktop, mul*1, 0); // no shift
 643                         }
 644                         else { // no alt
 645                             if (MOD__SHIFT) se->move_nodes(mul*10*nudge, 0); // shift
 646                             else se->move_nodes(mul*nudge, 0); // no shift
 647                         }
 648                         ret = TRUE;
 649                     }
 650                     break;
 651                 case GDK_Down: // move selection down
 652                 case GDK_KP_Down:
 653                 case GDK_KP_2:
 654                     if (!MOD__CTRL) { // not ctrl
 655                         gint mul = 1 + gobble_key_events(
 656                             get_group0_keyval(&event->key), 0); // with any mask
 657                         if (MOD__ALT) { // alt
 658                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*-10); // shift
 659                             else se->move_nodes_screen(desktop, 0, mul*-1); // no shift
 660                         }
 661                         else { // no alt
 662                             if (MOD__SHIFT) se->move_nodes(0, mul*-10*nudge); // shift
 663                             else se->move_nodes(0, mul*-nudge); // no shift
 664                         }
 665                         ret = TRUE;
 666                     }
 667                     break;
 668                 case GDK_Escape:
 669                 {
 670                     Geom::OptRect const b = Inkscape::Rubberband::get(desktop)->getRectangle();
 671                     if (b) {
 672                         Inkscape::Rubberband::get(desktop)->stop();
 673                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 674                         nc->rb_escaped = true;
 675                     } else {
 676                         if (se->has_selection()) {
 677                             se->deselect();
 678                         } else {
 679                             sp_desktop_selection(desktop)->clear();
 680                         }
 681                     }
 682                     ret = TRUE;
 683                     break;
 684                 }
 685
 686                 case GDK_bracketleft:
 687                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 688                         if (nc->leftctrl)
 689                             se->rotate_nodes (M_PI/snaps, -1, false);
 690                         if (nc->rightctrl)
 691                             se->rotate_nodes (M_PI/snaps, 1, false);
 692                     } else if ( MOD__ALT && !MOD__CTRL ) {
 693                         if (nc->leftalt && nc->rightalt)
 694                             se->rotate_nodes (1, 0, true);
 695                         else {
 696                             if (nc->leftalt)
 697                                 se->rotate_nodes (1, -1, true);
 698                             if (nc->rightalt)
 699                                 se->rotate_nodes (1, 1, true);
 700                         }
 701                     } else if ( snaps != 0 ) {
 702                         se->rotate_nodes (M_PI/snaps, 0, false);
 703                     }
 704                     ret = TRUE;
 705                     break;
 706                 case GDK_bracketright:
 707                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 708                         if (nc->leftctrl)
 709                             se->rotate_nodes (-M_PI/snaps, -1, false);
 710                         if (nc->rightctrl)
 711                             se->rotate_nodes (-M_PI/snaps, 1, false);
 712                     } else if ( MOD__ALT && !MOD__CTRL ) {
 713                         if (nc->leftalt && nc->rightalt)
 714                             se->rotate_nodes (-1, 0, true);
 715                         else {
 716                             if (nc->leftalt)
 717                                 se->rotate_nodes (-1, -1, true);
 718                             if (nc->rightalt)
 719                                 se->rotate_nodes (-1, 1, true);
 720                         }
 721                     } else if ( snaps != 0 ) {
 722                         se->rotate_nodes (-M_PI/snaps, 0, false);
 723                     }
 724                     ret = TRUE;
 725                     break;
 726                 case GDK_less:
 727                 case GDK_comma:
 728                     if (MOD__CTRL) {
 729                         if (nc->leftctrl)
 730                             se->scale_nodes(-offset, -1);
 731                         if (nc->rightctrl)
 732                             se->scale_nodes(-offset, 1);
 733                     } else if (MOD__ALT) {
 734                         if (nc->leftalt && nc->rightalt)
 735                             se->scale_nodes_screen (-1, 0);
 736                         else {
 737                             if (nc->leftalt)
 738                                 se->scale_nodes_screen (-1, -1);
 739                             if (nc->rightalt)
 740                                 se->scale_nodes_screen (-1, 1);
 741                         }
 742                     } else {
 743                         se->scale_nodes (-offset, 0);
 744                     }
 745                     ret = TRUE;
 746                     break;
 747                 case GDK_greater:
 748                 case GDK_period:
 749                     if (MOD__CTRL) {
 750                         if (nc->leftctrl)
 751                             se->scale_nodes (offset, -1);
 752                         if (nc->rightctrl)
 753                             se->scale_nodes (offset, 1);
 754                     } else if (MOD__ALT) {
 755                         if (nc->leftalt && nc->rightalt)
 756                             se->scale_nodes_screen (1, 0);
 757                         else {
 758                             if (nc->leftalt)
 759                                 se->scale_nodes_screen (1, -1);
 760                             if (nc->rightalt)
 761                                 se->scale_nodes_screen (1, 1);
 762                         }
 763                     } else {
 764                         se->scale_nodes (offset, 0);
 765                     }
 766                     ret = TRUE;
 767                     break;
 768
 769                 case GDK_Alt_L:
 770                     nc->leftalt = TRUE;
 771                     sp_node_context_show_modifier_tip(event_context, event);
 772                     break;
 773                 case GDK_Alt_R:
 774                     nc->rightalt = TRUE;
 775                     sp_node_context_show_modifier_tip(event_context, event);
 776                     break;
 777                 case GDK_Control_L:
 778                     nc->leftctrl = TRUE;
 779                     sp_node_context_show_modifier_tip(event_context, event);
 780                     break;
 781                 case GDK_Control_R:
 782                     nc->rightctrl = TRUE;
 783                     sp_node_context_show_modifier_tip(event_context, event);
 784                     break;
 785                 case GDK_Shift_L:
 786                 case GDK_Shift_R:
 787                 case GDK_Meta_L:
 788                 case GDK_Meta_R:
 789                     sp_node_context_show_modifier_tip(event_context, event);
 790                     break;
 791                 default:
 792                     ret = node_key(event);
 793                     break;
 794             }
 795             break;
 796         case GDK_KEY_RELEASE:
 797             switch (get_group0_keyval(&event->key)) {
 798                 case GDK_Alt_L:
 799                     nc->leftalt = FALSE;
 800                     event_context->defaultMessageContext()->clear();
 801                     break;
 802                 case GDK_Alt_R:
 803                     nc->rightalt = FALSE;
 804                     event_context->defaultMessageContext()->clear();
 805                     break;
 806                 case GDK_Control_L:
 807                     nc->leftctrl = FALSE;
 808                     event_context->defaultMessageContext()->clear();
 809                     break;
 810                 case GDK_Control_R:
 811                     nc->rightctrl = FALSE;
 812                     event_context->defaultMessageContext()->clear();
 813                     break;
 814                 case GDK_Shift_L:
 815                 case GDK_Shift_R:
 816                 case GDK_Meta_L:
 817                 case GDK_Meta_R:
 818                     event_context->defaultMessageContext()->clear();
 819                     break;
 820             }
 821             break;
 822         default:
 823             break;
 824     }
 825
 826     if (!ret) {
 827         if (((SPEventContextClass *) parent_class)->root_handler)
 828             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 829     }
 830
 831     return ret;
 832 }
 833
 834
 835 /*
 836   Local Variables:
 837   mode:c++
 838   c-file-style:"stroustrup"
 839   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 840   indent-tabs-mode:nil
 841   fill-column:99
 842   End:
 843 */
 844 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :