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 "prefs-utils.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     // TODO: should this be here?
 125     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 126     if (item && SP_IS_LPE_ITEM(item)) {
 127         sp_lpe_item_remove_temporary_canvasitems(SP_LPE_ITEM(item), ec->desktop);
 128     }
 129
 130     delete nc->shape_editor;
 131
 132     if (nc->_node_message_context) {
 133         delete nc->_node_message_context;
 134     }
 135
 136     G_OBJECT_CLASS(parent_class)->dispose(object);
 137 }
 138
 139 static void
 140 sp_node_context_setup(SPEventContext *ec)
 141 {
 142     SPNodeContext *nc = SP_NODE_CONTEXT(ec);
 143
 144     if (((SPEventContextClass *) parent_class)->setup)
 145         ((SPEventContextClass *) parent_class)->setup(ec);
 146
 147     Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
 148     nc->sel_changed_connection.disconnect();
 149     nc->sel_changed_connection =
 150         selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_node_context_selection_changed), (gpointer)nc));
 151
 152     SPItem *item = selection->singleItem();
 153
 154     nc->shape_editor = new ShapeEditor(ec->desktop);
 155
 156     nc->rb_escaped = false;
 157
 158     nc->cursor_drag = false;
 159
 160     nc->added_node = false;
 161
 162     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 163
 164     if (item) {
 165         nc->shape_editor->set_item(item);
 166     }
 167
 168     if (prefs_get_int_attribute("tools.nodes", "selcue", 0) != 0) {
 169         ec->enableSelectionCue();
 170     }
 171
 172     if (prefs_get_int_attribute("tools.nodes", "gradientdrag", 0) != 0) {
 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     nc->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         if (SP_IS_PATH(item)) {
 198             SPCanvasItem *canvasitem = sp_nodepath_generate_helperpath(desktop, SP_PATH(item));
 199             nc->flash_tempitem = desktop->add_temporary_canvasitem (canvasitem, timeout);
 200         }
 201     }
 202 }
 203
 204 /**
 205 \brief  Callback that processes the "changed" signal on the selection;
 206 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
 207 */
 208 void
 209 sp_node_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 210 {
 211     SPNodeContext *nc = SP_NODE_CONTEXT(data);
 212
 213     // TODO: update ShapeEditorsCollective instead
 214     nc->shape_editor->unset_item();
 215     SPItem *item = selection->singleItem();
 216     nc->shape_editor->set_item(item);
 217     nc->shape_editor->update_statusbar();
 218 }
 219
 220 void
 221 sp_node_context_show_modifier_tip(SPEventContext *event_context, GdkEvent *event)
 222 {
 223     sp_event_show_modifier_tip
 224         (event_context->defaultMessageContext(), event,
 225          _("<b>Ctrl</b>: toggle node type, snap handle angle, move hor/vert; <b>Ctrl+Alt</b>: move along handles"),
 226          _("<b>Shift</b>: toggle node selection, disable snapping, rotate both handles"),
 227          _("<b>Alt</b>: lock handle length; <b>Ctrl+Alt</b>: move along handles"));
 228 }
 229
 230 static gint
 231 sp_node_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 232 {
 233     gint ret = FALSE;
 234
 235     if (prefs_get_int_attribute ("tools.nodes", "pathflash_enabled", 0) == 1) {
 236         guint timeout = prefs_get_int_attribute("tools.nodes", "pathflash_timeout", 500);
 237         if (SP_IS_LPE_ITEM(item)) {
 238             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 239             if (lpe) {
 240                 if (lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH) {
 241                     // suppressed and permanent flashes for LPE items are handled in
 242                     // sp_node_context_selection_changed()
 243                     return ret;
 244                 }
 245                 if (lpe->pathFlashType() == Inkscape::LivePathEffect::PERMANENT_FLASH) {
 246                     timeout = 0;
 247                 }
 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     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 264
 265     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 266     double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 267     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); // read every time, to make prefs changes really live
 268     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 269     double const offset = prefs_get_double_attribute_limited("options.defaultscale", "value", 2, 0, 1000);
 270
 271     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
 272         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
 273         nc->flash_tempitem = NULL;
 274         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
 275     } else {
 276         nc->remove_flash_counter--;
 277     }
 278
 279     gint ret = FALSE;
 280     switch (event->type) {
 281         case GDK_BUTTON_PRESS:
 282             if (event->button.button == 1 && !event_context->space_panning) {
 283                 // save drag origin
 284                 event_context->xp = (gint) event->button.x;
 285                 event_context->yp = (gint) event->button.y;
 286                 event_context->within_tolerance = true;
 287                 nc->shape_editor->cancel_hit();
 288
 289                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 290                     if (!nc->drag) {
 291                         if (nc->shape_editor->has_nodepath() && selection->single() /* && item_over */) {
 292                             // save drag origin
 293                             bool over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), true);
 294                             //only dragging curves
 295                             if (over_stroke) {
 296                                 ret = TRUE;
 297                                 break;
 298                             }
 299                         }
 300                     }
 301                 }
 302                 NR::Point const button_w(event->button.x,
 303                                          event->button.y);
 304                 NR::Point const button_dt(desktop->w2d(button_w));
 305                 Inkscape::Rubberband::get()->start(desktop, button_dt);
 306                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 307                 desktop->updateNow();
 308                 ret = TRUE;
 309             }
 310             break;
 311         case GDK_MOTION_NOTIFY:
 312             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 313
 314                 if ( event_context->within_tolerance
 315                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 316                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 317                     break; // do not drag if we're within tolerance from origin
 318                 }
 319
 320                 // The path went away while dragging; throw away any further motion
 321                 // events until the mouse pointer is released.
 322
 323                 if (nc->shape_editor->hits_curve() && !nc->shape_editor->has_nodepath()) {
 324                   break;
 325                 }
 326
 327                 // Once the user has moved farther than tolerance from the original location
 328                 // (indicating they intend to move the object, not click), then always process the
 329                 // motion notify coordinates as given (no snapping back to origin)
 330                 event_context->within_tolerance = false;
 331
 332                 // Once we determine what the user is doing (dragging either a node or the
 333                 // selection rubberband), make sure we continue to perform that operation
 334                 // until the mouse pointer is lifted.
 335                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 336                     if (nc->shape_editor->hits_curve() && nc->shape_editor->has_nodepath()) {
 337                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 338                     } else {
 339                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 340                     }
 341                 }
 342
 343                 switch (nc->current_state) {
 344                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 345                         {
 346                             nc->shape_editor->curve_drag (event->motion.x, event->motion.y);
 347
 348                             gobble_motion_events(GDK_BUTTON1_MASK);
 349                             break;
 350                         }
 351                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 352                         if (Inkscape::Rubberband::get()->is_started()) {
 353                             NR::Point const motion_w(event->motion.x,
 354                                                 event->motion.y);
 355                             NR::Point const motion_dt(desktop->w2d(motion_w));
 356                             Inkscape::Rubberband::get()->move(motion_dt);
 357                         }
 358                         break;
 359                 }
 360
 361                 nc->drag = TRUE;
 362                 ret = TRUE;
 363             } else {
 364                 if (!nc->shape_editor->has_nodepath() || selection->singleItem() == NULL) {
 365                     break;
 366                 }
 367
 368                 bool over_stroke = false;
 369                 over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->motion.x, event->motion.y), false);
 370
 371                 if (nc->cursor_drag && !over_stroke) {
 372                     event_context->cursor_shape = cursor_node_xpm;
 373                     event_context->hot_x = 1;
 374                     event_context->hot_y = 1;
 375                     sp_event_context_update_cursor(event_context);
 376                     nc->cursor_drag = false;
 377                 } else if (!nc->cursor_drag && over_stroke) {
 378                     event_context->cursor_shape = cursor_node_d_xpm;
 379                     event_context->hot_x = 1;
 380                     event_context->hot_y = 1;
 381                     sp_event_context_update_cursor(event_context);
 382                     nc->cursor_drag = true;
 383                 }
 384             }
 385             break;
 386
 387         case GDK_2BUTTON_PRESS:
 388         case GDK_BUTTON_RELEASE:
 389             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 390                 // find out clicked item, disregarding groups, honoring Alt
 391                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 392                         NR::Point(event->button.x, event->button.y),
 393                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 394
 395                 event_context->xp = event_context->yp = 0;
 396
 397                 bool over_stroke = false;
 398                 if (nc->shape_editor->has_nodepath()) {
 399                     over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), false);
 400                 }
 401
 402                 if (item_clicked || over_stroke) {
 403                     if (over_stroke || nc->added_node) {
 404                         switch (event->type) {
 405                             case GDK_BUTTON_RELEASE:
 406                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 407                                     //add a node
 408                                     nc->shape_editor->add_node_near_point();
 409                                 } else {
 410                                     if (nc->added_node) { // we just received double click, ignore release
 411                                         nc->added_node = false;
 412                                         break;
 413                                     }
 414                                     //select the segment
 415                                     if (event->button.state & GDK_SHIFT_MASK) {
 416                                         nc->shape_editor->select_segment_near_point(true);
 417                                     } else {
 418                                         nc->shape_editor->select_segment_near_point(false);
 419                                     }
 420                                     desktop->updateNow();
 421                                 }
 422                                 break;
 423                             case GDK_2BUTTON_PRESS:
 424                                 //add a node
 425                                 nc->shape_editor->add_node_near_point();
 426                                 nc->added_node = true;
 427                                 break;
 428                             default:
 429                                 break;
 430                         }
 431                     } else if (event->button.state & GDK_SHIFT_MASK) {
 432                         selection->toggle(item_clicked);
 433                         desktop->updateNow();
 434                     } else {
 435                         selection->set(item_clicked);
 436                         desktop->updateNow();
 437                     }
 438                     Inkscape::Rubberband::get()->stop();
 439                     ret = TRUE;
 440                     break;
 441                 }
 442             }
 443             if (event->type == GDK_BUTTON_RELEASE) {
 444                 event_context->xp = event_context->yp = 0;
 445                 if (event->button.button == 1) {
 446                     NR::Maybe<NR::Rect> b = Inkscape::Rubberband::get()->getRectangle();
 447
 448                     if (nc->shape_editor->hits_curve() && !event_context->within_tolerance) { //drag curve
 449                         nc->shape_editor->finish_drag();
 450                     } else if (b && !event_context->within_tolerance) { // drag to select
 451                         nc->shape_editor->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 452                     } else {
 453                         if (!(nc->rb_escaped)) { // unless something was cancelled
 454                             if (nc->shape_editor->has_selection())
 455                                 nc->shape_editor->deselect();
 456                             else
 457                                 sp_desktop_selection(desktop)->clear();
 458                         }
 459                     }
 460                     ret = TRUE;
 461                     Inkscape::Rubberband::get()->stop();
 462                     desktop->updateNow();
 463                     nc->rb_escaped = false;
 464                     nc->drag = FALSE;
 465                     nc->shape_editor->cancel_hit();
 466                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 467                 }
 468             }
 469             break;
 470         case GDK_KEY_PRESS:
 471             switch (get_group0_keyval(&event->key)) {
 472                 case GDK_Insert:
 473                 case GDK_KP_Insert:
 474                     // with any modifiers
 475                     nc->shape_editor->add_node();
 476                     ret = TRUE;
 477                     break;
 478                 case GDK_Delete:
 479                 case GDK_KP_Delete:
 480                 case GDK_BackSpace:
 481                     if (MOD__CTRL_ONLY) {
 482                         nc->shape_editor->delete_nodes();
 483                     } else {
 484                         nc->shape_editor->delete_nodes_preserving_shape();
 485                     }
 486                     ret = TRUE;
 487                     break;
 488                 case GDK_C:
 489                 case GDK_c:
 490                     if (MOD__SHIFT_ONLY) {
 491                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_CUSP);
 492                         ret = TRUE;
 493                     }
 494                     break;
 495                 case GDK_S:
 496                 case GDK_s:
 497                     if (MOD__SHIFT_ONLY) {
 498                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 499                         ret = TRUE;
 500                     }
 501                     break;
 502                 case GDK_Y:
 503                 case GDK_y:
 504                     if (MOD__SHIFT_ONLY) {
 505                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SYMM);
 506                         ret = TRUE;
 507                     }
 508                     break;
 509                 case GDK_B:
 510                 case GDK_b:
 511                     if (MOD__SHIFT_ONLY) {
 512                         nc->shape_editor->break_at_nodes();
 513                         ret = TRUE;
 514                     }
 515                     break;
 516                 case GDK_J:
 517                 case GDK_j:
 518                     if (MOD__SHIFT_ONLY) {
 519                         nc->shape_editor->join_nodes();
 520                         ret = TRUE;
 521                     }
 522                     break;
 523                 case GDK_D:
 524                 case GDK_d:
 525                     if (MOD__SHIFT_ONLY) {
 526                         nc->shape_editor->duplicate_nodes();
 527                         ret = TRUE;
 528                     }
 529                     break;
 530                 case GDK_L:
 531                 case GDK_l:
 532                     if (MOD__SHIFT_ONLY) {
 533                         nc->shape_editor->set_type_of_segments(NR_LINETO);
 534                         ret = TRUE;
 535                     }
 536                     break;
 537                 case GDK_U:
 538                 case GDK_u:
 539                     if (MOD__SHIFT_ONLY) {
 540                         nc->shape_editor->set_type_of_segments(NR_CURVETO);
 541                         ret = TRUE;
 542                     }
 543                     break;
 544                 case GDK_R:
 545                 case GDK_r:
 546                     if (MOD__SHIFT_ONLY) {
 547                         // FIXME: add top panel button
 548                         sp_selected_path_reverse();
 549                         ret = TRUE;
 550                     }
 551                     break;
 552                 case GDK_x:
 553                 case GDK_X:
 554                     if (MOD__ALT_ONLY) {
 555                         desktop->setToolboxFocusTo ("altx-nodes");
 556                         ret = TRUE;
 557                     }
 558                     break;
 559                 case GDK_Left: // move selection left
 560                 case GDK_KP_Left:
 561                 case GDK_KP_4:
 562                     if (!MOD__CTRL) { // not ctrl
 563                         gint mul = 1 + gobble_key_events(
 564                             get_group0_keyval(&event->key), 0); // with any mask
 565                         if (MOD__ALT) { // alt
 566                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*-10, 0); // shift
 567                             else nc->shape_editor->move_nodes_screen(mul*-1, 0); // no shift
 568                         }
 569                         else { // no alt
 570                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*-10*nudge, 0); // shift
 571                             else nc->shape_editor->move_nodes(mul*-nudge, 0); // no shift
 572                         }
 573                         ret = TRUE;
 574                     }
 575                     break;
 576                 case GDK_Up: // move selection up
 577                 case GDK_KP_Up:
 578                 case GDK_KP_8:
 579                     if (!MOD__CTRL) { // not ctrl
 580                         gint mul = 1 + gobble_key_events(
 581                             get_group0_keyval(&event->key), 0); // with any mask
 582                         if (MOD__ALT) { // alt
 583                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*10); // shift
 584                             else nc->shape_editor->move_nodes_screen(0, mul*1); // no shift
 585                         }
 586                         else { // no alt
 587                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*10*nudge); // shift
 588                             else nc->shape_editor->move_nodes(0, mul*nudge); // no shift
 589                         }
 590                         ret = TRUE;
 591                     }
 592                     break;
 593                 case GDK_Right: // move selection right
 594                 case GDK_KP_Right:
 595                 case GDK_KP_6:
 596                     if (!MOD__CTRL) { // not ctrl
 597                         gint mul = 1 + gobble_key_events(
 598                             get_group0_keyval(&event->key), 0); // with any mask
 599                         if (MOD__ALT) { // alt
 600                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*10, 0); // shift
 601                             else nc->shape_editor->move_nodes_screen(mul*1, 0); // no shift
 602                         }
 603                         else { // no alt
 604                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*10*nudge, 0); // shift
 605                             else nc->shape_editor->move_nodes(mul*nudge, 0); // no shift
 606                         }
 607                         ret = TRUE;
 608                     }
 609                     break;
 610                 case GDK_Down: // move selection down
 611                 case GDK_KP_Down:
 612                 case GDK_KP_2:
 613                     if (!MOD__CTRL) { // not ctrl
 614                         gint mul = 1 + gobble_key_events(
 615                             get_group0_keyval(&event->key), 0); // with any mask
 616                         if (MOD__ALT) { // alt
 617                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*-10); // shift
 618                             else nc->shape_editor->move_nodes_screen(0, mul*-1); // no shift
 619                         }
 620                         else { // no alt
 621                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*-10*nudge); // shift
 622                             else nc->shape_editor->move_nodes(0, mul*-nudge); // no shift
 623                         }
 624                         ret = TRUE;
 625                     }
 626                     break;
 627                 case GDK_Escape:
 628                 {
 629                     NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 630                     if (b) {
 631                         Inkscape::Rubberband::get()->stop();
 632                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 633                         nc->rb_escaped = true;
 634                     } else {
 635                         if (nc->shape_editor->has_selection()) {
 636                             nc->shape_editor->deselect();
 637                         } else {
 638                             sp_desktop_selection(desktop)->clear();
 639                         }
 640                     }
 641                     ret = TRUE;
 642                     break;
 643                 }
 644
 645                 case GDK_bracketleft:
 646                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 647                         if (nc->leftctrl)
 648                             nc->shape_editor->rotate_nodes (M_PI/snaps, -1, false);
 649                         if (nc->rightctrl)
 650                             nc->shape_editor->rotate_nodes (M_PI/snaps, 1, false);
 651                     } else if ( MOD__ALT && !MOD__CTRL ) {
 652                         if (nc->leftalt && nc->rightalt)
 653                             nc->shape_editor->rotate_nodes (1, 0, true);
 654                         else {
 655                             if (nc->leftalt)
 656                                 nc->shape_editor->rotate_nodes (1, -1, true);
 657                             if (nc->rightalt)
 658                                 nc->shape_editor->rotate_nodes (1, 1, true);
 659                         }
 660                     } else if ( snaps != 0 ) {
 661                         nc->shape_editor->rotate_nodes (M_PI/snaps, 0, false);
 662                     }
 663                     ret = TRUE;
 664                     break;
 665                 case GDK_bracketright:
 666                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 667                         if (nc->leftctrl)
 668                             nc->shape_editor->rotate_nodes (-M_PI/snaps, -1, false);
 669                         if (nc->rightctrl)
 670                             nc->shape_editor->rotate_nodes (-M_PI/snaps, 1, false);
 671                     } else if ( MOD__ALT && !MOD__CTRL ) {
 672                         if (nc->leftalt && nc->rightalt)
 673                             nc->shape_editor->rotate_nodes (-1, 0, true);
 674                         else {
 675                             if (nc->leftalt)
 676                                 nc->shape_editor->rotate_nodes (-1, -1, true);
 677                             if (nc->rightalt)
 678                                 nc->shape_editor->rotate_nodes (-1, 1, true);
 679                         }
 680                     } else if ( snaps != 0 ) {
 681                         nc->shape_editor->rotate_nodes (-M_PI/snaps, 0, false);
 682                     }
 683                     ret = TRUE;
 684                     break;
 685                 case GDK_less:
 686                 case GDK_comma:
 687                     if (MOD__CTRL) {
 688                         if (nc->leftctrl)
 689                             nc->shape_editor->scale_nodes(-offset, -1);
 690                         if (nc->rightctrl)
 691                             nc->shape_editor->scale_nodes(-offset, 1);
 692                     } else if (MOD__ALT) {
 693                         if (nc->leftalt && nc->rightalt)
 694                             nc->shape_editor->scale_nodes_screen (-1, 0);
 695                         else {
 696                             if (nc->leftalt)
 697                                 nc->shape_editor->scale_nodes_screen (-1, -1);
 698                             if (nc->rightalt)
 699                                 nc->shape_editor->scale_nodes_screen (-1, 1);
 700                         }
 701                     } else {
 702                         nc->shape_editor->scale_nodes (-offset, 0);
 703                     }
 704                     ret = TRUE;
 705                     break;
 706                 case GDK_greater:
 707                 case GDK_period:
 708                     if (MOD__CTRL) {
 709                         if (nc->leftctrl)
 710                             nc->shape_editor->scale_nodes (offset, -1);
 711                         if (nc->rightctrl)
 712                             nc->shape_editor->scale_nodes (offset, 1);
 713                     } else if (MOD__ALT) {
 714                         if (nc->leftalt && nc->rightalt)
 715                             nc->shape_editor->scale_nodes_screen (1, 0);
 716                         else {
 717                             if (nc->leftalt)
 718                                 nc->shape_editor->scale_nodes_screen (1, -1);
 719                             if (nc->rightalt)
 720                                 nc->shape_editor->scale_nodes_screen (1, 1);
 721                         }
 722                     } else {
 723                         nc->shape_editor->scale_nodes (offset, 0);
 724                     }
 725                     ret = TRUE;
 726                     break;
 727
 728                 case GDK_Alt_L:
 729                     nc->leftalt = TRUE;
 730                     sp_node_context_show_modifier_tip(event_context, event);
 731                     break;
 732                 case GDK_Alt_R:
 733                     nc->rightalt = TRUE;
 734                     sp_node_context_show_modifier_tip(event_context, event);
 735                     break;
 736                 case GDK_Control_L:
 737                     nc->leftctrl = TRUE;
 738                     sp_node_context_show_modifier_tip(event_context, event);
 739                     break;
 740                 case GDK_Control_R:
 741                     nc->rightctrl = TRUE;
 742                     sp_node_context_show_modifier_tip(event_context, event);
 743                     break;
 744                 case GDK_Shift_L:
 745                 case GDK_Shift_R:
 746                 case GDK_Meta_L:
 747                 case GDK_Meta_R:
 748                     sp_node_context_show_modifier_tip(event_context, event);
 749                     break;
 750                 default:
 751                     ret = node_key(event);
 752                     break;
 753             }
 754             break;
 755         case GDK_KEY_RELEASE:
 756             switch (get_group0_keyval(&event->key)) {
 757                 case GDK_Alt_L:
 758                     nc->leftalt = FALSE;
 759                     event_context->defaultMessageContext()->clear();
 760                     break;
 761                 case GDK_Alt_R:
 762                     nc->rightalt = FALSE;
 763                     event_context->defaultMessageContext()->clear();
 764                     break;
 765                 case GDK_Control_L:
 766                     nc->leftctrl = FALSE;
 767                     event_context->defaultMessageContext()->clear();
 768                     break;
 769                 case GDK_Control_R:
 770                     nc->rightctrl = FALSE;
 771                     event_context->defaultMessageContext()->clear();
 772                     break;
 773                 case GDK_Shift_L:
 774                 case GDK_Shift_R:
 775                 case GDK_Meta_L:
 776                 case GDK_Meta_R:
 777                     event_context->defaultMessageContext()->clear();
 778                     break;
 779             }
 780             break;
 781         default:
 782             break;
 783     }
 784
 785     if (!ret) {
 786         if (((SPEventContextClass *) parent_class)->root_handler)
 787             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 788     }
 789
 790     return ret;
 791 }
 792
 793
 794 /*
 795   Local Variables:
 796   mode:c++
 797   c-file-style:"stroustrup"
 798   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 799   indent-tabs-mode:nil
 800   fill-column:99
 801   End:
 802 */
 803 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :