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     if (nc->grabbed) {
 122         sp_canvas_item_ungrab(nc->grabbed, GDK_CURRENT_TIME);
 123         nc->grabbed = NULL;
 124     }
 125
 126     nc->sel_changed_connection.disconnect();
 127     nc->sel_changed_connection.~connection();
 128
 129     delete ec->shape_editor;
 130
 131     if (nc->_node_message_context) {
 132         delete nc->_node_message_context;
 133     }
 134
 135     G_OBJECT_CLASS(parent_class)->dispose(object);
 136 }
 137
 138 static void
 139 sp_node_context_setup(SPEventContext *ec)
 140 {
 141     SPNodeContext *nc = SP_NODE_CONTEXT(ec);
 142
 143     if (((SPEventContextClass *) parent_class)->setup)
 144         ((SPEventContextClass *) parent_class)->setup(ec);
 145
 146     Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
 147     nc->sel_changed_connection.disconnect();
 148     nc->sel_changed_connection =
 149         selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_node_context_selection_changed), (gpointer)nc));
 150
 151     SPItem *item = selection->singleItem();
 152
 153     ec->shape_editor = new ShapeEditor(ec->desktop);
 154
 155     nc->rb_escaped = false;
 156
 157     nc->cursor_drag = false;
 158
 159     nc->added_node = false;
 160
 161     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 162
 163     if (item) {
 164         ec->shape_editor->set_item(item, SH_NODEPATH);
 165         ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 166     }
 167
 168     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 169     if (prefs->getBool("/tools/nodes/selcue")) {
 170         ec->enableSelectionCue();
 171     }
 172     if (prefs->getBool("/tools/nodes/gradientdrag")) {
 173         ec->enableGrDrag();
 174     }
 175
 176     ec->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
 177
 178     nc->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 179
 180     ec->shape_editor->update_statusbar();
 181 }
 182
 183 static void
 184 sp_node_context_flash_path(SPEventContext *event_context, SPItem *item, guint timeout) {
 185     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 186
 187     nc->remove_flash_counter = 3; // for some reason root_handler is called twice after each item_handler...
 188     if (nc->flashed_item != item) {
 189         // we entered a new item
 190         nc->flashed_item = item;
 191         SPDesktop *desktop = event_context->desktop;
 192         if (nc->flash_tempitem) {
 193             desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 194             nc->flash_tempitem = NULL;
 195         }
 196
 197         SPCanvasItem *canvasitem = sp_nodepath_generate_helperpath(desktop, item);
 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     SPDesktop *desktop = event_context->desktop;
 239
 240     switch (event->type) {
 241         case GDK_MOTION_NOTIFY:
 242         {
 243             // find out actual item we're over, disregarding groups
 244             SPItem *actual_item = sp_event_context_find_item (desktop,
 245                                                               Geom::Point(event->button.x, event->button.y), FALSE, TRUE);
 246             if (!actual_item)
 247                 break;
 248
 249
 250             if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
 251                 if (prefs->getBool("/tools/nodes/pathflash_unselected")) {
 252                     // do not flash if we have some path selected and a single item in selection (i.e. it
 253                     // is the same path that we're editing)
 254                     SPDesktop *desktop = event_context->desktop;
 255                     ShapeEditor* se = event_context->shape_editor;
 256                     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 257                     if (se->has_nodepath() && selection->singleItem()) {
 258                         break;
 259                     }
 260                 }
 261                 if (SP_IS_LPE_ITEM(actual_item)) {
 262                     Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(actual_item));
 263                     if (lpe && (lpe->providesOwnFlashPaths() ||
 264                                 lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH)) {
 265                         // path should be suppressed or permanent; this is handled in
 266                         // sp_node_context_selection_changed()
 267                         break;
 268                     }
 269                 }
 270                 guint timeout = prefs->getInt("/tools/nodes/pathflash_timeout", 500);
 271                 sp_node_context_flash_path(event_context, actual_item, timeout);
 272             }
 273         }
 274         break;
 275
 276         default:
 277             break;
 278     }
 279
 280     if (((SPEventContextClass *) parent_class)->item_handler)
 281         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 282
 283     return ret;
 284 }
 285
 286 static gint
 287 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 288 {
 289     SPDesktop *desktop = event_context->desktop;
 290     ShapeEditor* se = event_context->shape_editor;
 291     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 292     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 293
 294     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 295     double const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000); // in px
 296     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); // read every time, to make prefs changes really live
 297     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 298     double const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000);
 299
 300     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
 301         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 302         nc->flash_tempitem = NULL;
 303         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
 304     } else {
 305         nc->remove_flash_counter--;
 306     }
 307
 308     gint ret = FALSE;
 309     switch (event->type) {
 310         case GDK_BUTTON_PRESS:
 311             if (event->button.button == 1 && !event_context->space_panning) {
 312                 // save drag origin
 313                 event_context->xp = (gint) event->button.x;
 314                 event_context->yp = (gint) event->button.y;
 315                 event_context->within_tolerance = true;
 316                 se->cancel_hit();
 317
 318                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 319                     if (!nc->drag) {
 320                         if (se->has_nodepath() && selection->single() /* && item_over */) {
 321                                 // save drag origin
 322                             bool over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), true);
 323                             //only dragging curves
 324                             if (over_stroke) {
 325                                 ret = TRUE;
 326                                 break;
 327                             }
 328                         }
 329                     }
 330                 }
 331                 Geom::Point const button_w(event->button.x,
 332                                          event->button.y);
 333                 Geom::Point const button_dt(desktop->w2d(button_w));
 334                 Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
 335
 336                 if (nc->grabbed) {
 337                     sp_canvas_item_ungrab(nc->grabbed, event->button.time);
 338                     nc->grabbed = NULL;
 339                 }
 340
 341                 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 342                                     GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK,
 343                                     NULL, event->button.time);
 344                                 nc->grabbed = SP_CANVAS_ITEM(desktop->acetate);
 345
 346                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 347                 desktop->updateNow();
 348                 ret = TRUE;
 349             }
 350             break;
 351         case GDK_MOTION_NOTIFY:
 352             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 353
 354                 if ( event_context->within_tolerance
 355                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 356                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 357                     break; // do not drag if we're within tolerance from origin
 358                 }
 359
 360                 // The path went away while dragging; throw away any further motion
 361                 // events until the mouse pointer is released.
 362
 363                 if (se->hits_curve() && !se->has_nodepath()) {
 364                   break;
 365                 }
 366
 367                 // Once the user has moved farther than tolerance from the original location
 368                 // (indicating they intend to move the object, not click), then always process the
 369                 // motion notify coordinates as given (no snapping back to origin)
 370                 event_context->within_tolerance = false;
 371
 372                 // Once we determine what the user is doing (dragging either a node or the
 373                 // selection rubberband), make sure we continue to perform that operation
 374                 // until the mouse pointer is lifted.
 375                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 376                     if (se->hits_curve() && se->has_nodepath()) {
 377                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 378                     } else {
 379                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 380                     }
 381                 }
 382
 383                 switch (nc->current_state) {
 384                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 385                         {
 386                             se->curve_drag (event->motion.x, event->motion.y);
 387
 388                             gobble_motion_events(GDK_BUTTON1_MASK);
 389                             break;
 390                         }
 391                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 392                         if (Inkscape::Rubberband::get(desktop)->is_started()) {
 393                             Geom::Point const motion_w(event->motion.x,
 394                                                 event->motion.y);
 395                             Geom::Point const motion_dt(desktop->w2d(motion_w));
 396                             Inkscape::Rubberband::get(desktop)->move(motion_dt);
 397                         }
 398                         break;
 399                 }
 400
 401                 nc->drag = TRUE;
 402                 ret = TRUE;
 403             } else {
 404                 if (!se->has_nodepath() || selection->singleItem() == NULL) {
 405                     break;
 406                 }
 407
 408                 bool over_stroke = false;
 409                 over_stroke = se->is_over_stroke(Geom::Point(event->motion.x, event->motion.y), false);
 410
 411                 if (nc->cursor_drag && !over_stroke) {
 412                     event_context->cursor_shape = cursor_node_xpm;
 413                     event_context->hot_x = 1;
 414                     event_context->hot_y = 1;
 415                     sp_event_context_update_cursor(event_context);
 416                     nc->cursor_drag = false;
 417                 } else if (!nc->cursor_drag && over_stroke) {
 418                     event_context->cursor_shape = cursor_node_d_xpm;
 419                     event_context->hot_x = 1;
 420                     event_context->hot_y = 1;
 421                     sp_event_context_update_cursor(event_context);
 422                     nc->cursor_drag = true;
 423                 }
 424             }
 425             break;
 426
 427         case GDK_2BUTTON_PRESS:
 428         case GDK_BUTTON_RELEASE:
 429             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 430                 // find out clicked item, disregarding groups, honoring Alt
 431                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 432                         Geom::Point(event->button.x, event->button.y),
 433                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 434
 435                 event_context->xp = event_context->yp = 0;
 436
 437                 bool over_stroke = false;
 438                 if (se->has_nodepath()) {
 439                     over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), false);
 440                 }
 441
 442                 if (item_clicked || over_stroke) {
 443                     if (over_stroke || nc->added_node) {
 444                         switch (event->type) {
 445                             case GDK_BUTTON_RELEASE:
 446                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 447                                     //add a node
 448                                     se->add_node_near_point();
 449                                 } else {
 450                                     if (nc->added_node) { // we just received double click, ignore release
 451                                         nc->added_node = false;
 452                                         break;
 453                                     }
 454                                     //select the segment
 455                                     if (event->button.state & GDK_SHIFT_MASK) {
 456                                         se->select_segment_near_point(true);
 457                                     } else {
 458                                         se->select_segment_near_point(false);
 459                                     }
 460                                     desktop->updateNow();
 461                                 }
 462                                 break;
 463                             case GDK_2BUTTON_PRESS:
 464                                 //add a node
 465                                 se->add_node_near_point();
 466                                 nc->added_node = true;
 467                                 break;
 468                             default:
 469                                 break;
 470                         }
 471                     } else if (event->button.state & GDK_SHIFT_MASK) {
 472                         selection->toggle(item_clicked);
 473                         desktop->updateNow();
 474                     } else {
 475                         selection->set(item_clicked);
 476                         desktop->updateNow();
 477                     }
 478                     Inkscape::Rubberband::get(desktop)->stop();
 479                     if (nc->grabbed) {
 480                         sp_canvas_item_ungrab(nc->grabbed, event->button.time);
 481                         nc->grabbed = NULL;
 482                     }
 483                     ret = TRUE;
 484                     break;
 485                 }
 486             }
 487             if (event->type == GDK_BUTTON_RELEASE) {
 488                 event_context->xp = event_context->yp = 0;
 489                 if (event->button.button == 1) {
 490                         Geom::OptRect b = Inkscape::Rubberband::get(desktop)->getRectangle();
 491
 492                     if (se->hits_curve() && !event_context->within_tolerance) { //drag curve
 493                         se->finish_drag();
 494                     } else if (b && !event_context->within_tolerance) { // drag to select
 495                         se->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 496                     } else {
 497                         if (!(nc->rb_escaped)) { // unless something was canceled
 498                             if (se->has_selection())
 499                                 se->deselect();
 500                             else
 501                                 sp_desktop_selection(desktop)->clear();
 502                         }
 503                     }
 504                     ret = TRUE;
 505                     Inkscape::Rubberband::get(desktop)->stop();
 506
 507                                         if (nc->grabbed) {
 508                                                 sp_canvas_item_ungrab(nc->grabbed, event->button.time);
 509                                                 nc->grabbed = NULL;
 510                                         }
 511
 512                     desktop->updateNow();
 513                     nc->rb_escaped = false;
 514                     nc->drag = FALSE;
 515                     se->cancel_hit();
 516                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 517                 }
 518             }
 519             break;
 520         case GDK_KEY_PRESS:
 521             switch (get_group0_keyval(&event->key)) {
 522                 case GDK_Insert:
 523                 case GDK_KP_Insert:
 524                     // with any modifiers
 525                     se->add_node();
 526                     ret = TRUE;
 527                     break;
 528                 case GDK_I:
 529                 case GDK_i:
 530                     // apple keyboards have no Insert
 531                     if (MOD__SHIFT_ONLY) {
 532                         se->add_node();
 533                         ret = TRUE;
 534                     }
 535                     break;
 536                 case GDK_Delete:
 537                 case GDK_KP_Delete:
 538                 case GDK_BackSpace:
 539                     if (MOD__CTRL_ONLY) {
 540                         se->delete_nodes();
 541                     } else {
 542                         se->delete_nodes_preserving_shape();
 543                     }
 544                     ret = TRUE;
 545                     break;
 546                 case GDK_C:
 547                 case GDK_c:
 548                     if (MOD__SHIFT_ONLY) {
 549                         se->set_node_type(Inkscape::NodePath::NODE_CUSP);
 550                         ret = TRUE;
 551                     }
 552                     break;
 553                 case GDK_S:
 554                 case GDK_s:
 555                     if (MOD__SHIFT_ONLY) {
 556                         se->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 557                         ret = TRUE;
 558                     }
 559                     break;
 560                 case GDK_A:
 561                 case GDK_a:
 562                     if (MOD__SHIFT_ONLY) {
 563                         se->set_node_type(Inkscape::NodePath::NODE_AUTO);
 564                         ret = TRUE;
 565                     }
 566                     break;
 567                 case GDK_Y:
 568                 case GDK_y:
 569                     if (MOD__SHIFT_ONLY) {
 570                         se->set_node_type(Inkscape::NodePath::NODE_SYMM);
 571                         ret = TRUE;
 572                     }
 573                     break;
 574                 case GDK_B:
 575                 case GDK_b:
 576                     if (MOD__SHIFT_ONLY) {
 577                         se->break_at_nodes();
 578                         ret = TRUE;
 579                     }
 580                     break;
 581                 case GDK_J:
 582                 case GDK_j:
 583                     if (MOD__SHIFT_ONLY) {
 584                         se->join_nodes();
 585                         ret = TRUE;
 586                     }
 587                     break;
 588                 case GDK_D:
 589                 case GDK_d:
 590                     if (MOD__SHIFT_ONLY) {
 591                         se->duplicate_nodes();
 592                         ret = TRUE;
 593                     }
 594                     break;
 595                 case GDK_L:
 596                 case GDK_l:
 597                     if (MOD__SHIFT_ONLY) {
 598                         se->set_type_of_segments(NR_LINETO);
 599                         ret = TRUE;
 600                     }
 601                     break;
 602                 case GDK_U:
 603                 case GDK_u:
 604                     if (MOD__SHIFT_ONLY) {
 605                         se->set_type_of_segments(NR_CURVETO);
 606                         ret = TRUE;
 607                     }
 608                     break;
 609                 case GDK_R:
 610                 case GDK_r:
 611                     if (MOD__SHIFT_ONLY) {
 612                         // FIXME: add top panel button
 613                         sp_selected_path_reverse(desktop);
 614                         ret = TRUE;
 615                     }
 616                     break;
 617                 case GDK_x:
 618                 case GDK_X:
 619                     if (MOD__ALT_ONLY) {
 620                         desktop->setToolboxFocusTo ("altx-nodes");
 621                         ret = TRUE;
 622                     }
 623                     break;
 624                 case GDK_Left: // move selection left
 625                 case GDK_KP_Left:
 626                 case GDK_KP_4:
 627                     if (!MOD__CTRL) { // not ctrl
 628                         gint mul = 1 + gobble_key_events(
 629                             get_group0_keyval(&event->key), 0); // with any mask
 630                         if (MOD__ALT) { // alt
 631                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*-10, 0); // shift
 632                             else se->move_nodes_screen(desktop, mul*-1, 0); // no shift
 633                         }
 634                         else { // no alt
 635                             if (MOD__SHIFT) se->move_nodes(mul*-10*nudge, 0); // shift
 636                             else se->move_nodes(mul*-nudge, 0); // no shift
 637                         }
 638                         ret = TRUE;
 639                     }
 640                     break;
 641                 case GDK_Up: // move selection up
 642                 case GDK_KP_Up:
 643                 case GDK_KP_8:
 644                     if (!MOD__CTRL) { // not ctrl
 645                         gint mul = 1 + gobble_key_events(
 646                             get_group0_keyval(&event->key), 0); // with any mask
 647                         if (MOD__ALT) { // alt
 648                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*10); // shift
 649                             else se->move_nodes_screen(desktop, 0, mul*1); // no shift
 650                         }
 651                         else { // no alt
 652                             if (MOD__SHIFT) se->move_nodes(0, mul*10*nudge); // shift
 653                             else se->move_nodes(0, mul*nudge); // no shift
 654                         }
 655                         ret = TRUE;
 656                     }
 657                     break;
 658                 case GDK_Right: // move selection right
 659                 case GDK_KP_Right:
 660                 case GDK_KP_6:
 661                     if (!MOD__CTRL) { // not ctrl
 662                         gint mul = 1 + gobble_key_events(
 663                             get_group0_keyval(&event->key), 0); // with any mask
 664                         if (MOD__ALT) { // alt
 665                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*10, 0); // shift
 666                             else se->move_nodes_screen(desktop, mul*1, 0); // no shift
 667                         }
 668                         else { // no alt
 669                             if (MOD__SHIFT) se->move_nodes(mul*10*nudge, 0); // shift
 670                             else se->move_nodes(mul*nudge, 0); // no shift
 671                         }
 672                         ret = TRUE;
 673                     }
 674                     break;
 675                 case GDK_Down: // move selection down
 676                 case GDK_KP_Down:
 677                 case GDK_KP_2:
 678                     if (!MOD__CTRL) { // not ctrl
 679                         gint mul = 1 + gobble_key_events(
 680                             get_group0_keyval(&event->key), 0); // with any mask
 681                         if (MOD__ALT) { // alt
 682                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*-10); // shift
 683                             else se->move_nodes_screen(desktop, 0, mul*-1); // no shift
 684                         }
 685                         else { // no alt
 686                             if (MOD__SHIFT) se->move_nodes(0, mul*-10*nudge); // shift
 687                             else se->move_nodes(0, mul*-nudge); // no shift
 688                         }
 689                         ret = TRUE;
 690                     }
 691                     break;
 692                 case GDK_Escape:
 693                 {
 694                     Geom::OptRect const b = Inkscape::Rubberband::get(desktop)->getRectangle();
 695                     if (b) {
 696                         Inkscape::Rubberband::get(desktop)->stop();
 697                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 698                         nc->rb_escaped = true;
 699                     } else {
 700                         if (se->has_selection()) {
 701                             se->deselect();
 702                         } else {
 703                             sp_desktop_selection(desktop)->clear();
 704                         }
 705                     }
 706                     ret = TRUE;
 707                     break;
 708                 }
 709
 710                 case GDK_bracketleft:
 711                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 712                         if (nc->leftctrl)
 713                             se->rotate_nodes (M_PI/snaps, -1, false);
 714                         if (nc->rightctrl)
 715                             se->rotate_nodes (M_PI/snaps, 1, false);
 716                     } else if ( MOD__ALT && !MOD__CTRL ) {
 717                         if (nc->leftalt && nc->rightalt)
 718                             se->rotate_nodes (1, 0, true);
 719                         else {
 720                             if (nc->leftalt)
 721                                 se->rotate_nodes (1, -1, true);
 722                             if (nc->rightalt)
 723                                 se->rotate_nodes (1, 1, true);
 724                         }
 725                     } else if ( snaps != 0 ) {
 726                         se->rotate_nodes (M_PI/snaps, 0, false);
 727                     }
 728                     ret = TRUE;
 729                     break;
 730                 case GDK_bracketright:
 731                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 732                         if (nc->leftctrl)
 733                             se->rotate_nodes (-M_PI/snaps, -1, false);
 734                         if (nc->rightctrl)
 735                             se->rotate_nodes (-M_PI/snaps, 1, false);
 736                     } else if ( MOD__ALT && !MOD__CTRL ) {
 737                         if (nc->leftalt && nc->rightalt)
 738                             se->rotate_nodes (-1, 0, true);
 739                         else {
 740                             if (nc->leftalt)
 741                                 se->rotate_nodes (-1, -1, true);
 742                             if (nc->rightalt)
 743                                 se->rotate_nodes (-1, 1, true);
 744                         }
 745                     } else if ( snaps != 0 ) {
 746                         se->rotate_nodes (-M_PI/snaps, 0, false);
 747                     }
 748                     ret = TRUE;
 749                     break;
 750                 case GDK_less:
 751                 case GDK_comma:
 752                     if (MOD__CTRL) {
 753                         if (nc->leftctrl)
 754                             se->scale_nodes(-offset, -1);
 755                         if (nc->rightctrl)
 756                             se->scale_nodes(-offset, 1);
 757                     } else if (MOD__ALT) {
 758                         if (nc->leftalt && nc->rightalt)
 759                             se->scale_nodes_screen (-1, 0);
 760                         else {
 761                             if (nc->leftalt)
 762                                 se->scale_nodes_screen (-1, -1);
 763                             if (nc->rightalt)
 764                                 se->scale_nodes_screen (-1, 1);
 765                         }
 766                     } else {
 767                         se->scale_nodes (-offset, 0);
 768                     }
 769                     ret = TRUE;
 770                     break;
 771                 case GDK_greater:
 772                 case GDK_period:
 773                     if (MOD__CTRL) {
 774                         if (nc->leftctrl)
 775                             se->scale_nodes (offset, -1);
 776                         if (nc->rightctrl)
 777                             se->scale_nodes (offset, 1);
 778                     } else if (MOD__ALT) {
 779                         if (nc->leftalt && nc->rightalt)
 780                             se->scale_nodes_screen (1, 0);
 781                         else {
 782                             if (nc->leftalt)
 783                                 se->scale_nodes_screen (1, -1);
 784                             if (nc->rightalt)
 785                                 se->scale_nodes_screen (1, 1);
 786                         }
 787                     } else {
 788                         se->scale_nodes (offset, 0);
 789                     }
 790                     ret = TRUE;
 791                     break;
 792
 793                 case GDK_Alt_L:
 794                     nc->leftalt = TRUE;
 795                     sp_node_context_show_modifier_tip(event_context, event);
 796                     break;
 797                 case GDK_Alt_R:
 798                     nc->rightalt = TRUE;
 799                     sp_node_context_show_modifier_tip(event_context, event);
 800                     break;
 801                 case GDK_Control_L:
 802                     nc->leftctrl = TRUE;
 803                     sp_node_context_show_modifier_tip(event_context, event);
 804                     break;
 805                 case GDK_Control_R:
 806                     nc->rightctrl = TRUE;
 807                     sp_node_context_show_modifier_tip(event_context, event);
 808                     break;
 809                 case GDK_Shift_L:
 810                 case GDK_Shift_R:
 811                 case GDK_Meta_L:
 812                 case GDK_Meta_R:
 813                     sp_node_context_show_modifier_tip(event_context, event);
 814                     break;
 815                 default:
 816                     ret = node_key(event);
 817                     break;
 818             }
 819             break;
 820         case GDK_KEY_RELEASE:
 821             switch (get_group0_keyval(&event->key)) {
 822                 case GDK_Alt_L:
 823                     nc->leftalt = FALSE;
 824                     event_context->defaultMessageContext()->clear();
 825                     break;
 826                 case GDK_Alt_R:
 827                     nc->rightalt = FALSE;
 828                     event_context->defaultMessageContext()->clear();
 829                     break;
 830                 case GDK_Control_L:
 831                     nc->leftctrl = FALSE;
 832                     event_context->defaultMessageContext()->clear();
 833                     break;
 834                 case GDK_Control_R:
 835                     nc->rightctrl = FALSE;
 836                     event_context->defaultMessageContext()->clear();
 837                     break;
 838                 case GDK_Shift_L:
 839                 case GDK_Shift_R:
 840                 case GDK_Meta_L:
 841                 case GDK_Meta_R:
 842                     event_context->defaultMessageContext()->clear();
 843                     break;
 844             }
 845             break;
 846         default:
 847             break;
 848     }
 849
 850     if (!ret) {
 851         if (((SPEventContextClass *) parent_class)->root_handler)
 852             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 853     }
 854
 855     return ret;
 856 }
 857
 858
 859 /*
 860   Local Variables:
 861   mode:c++
 862   c-file-style:"stroustrup"
 863   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 864   indent-tabs-mode:nil
 865   fill-column:99
 866   End:
 867 */
 868 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :