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 <gdk/gdkkeysyms.h>
  17 #include "macros.h"
  18 #include <glibmm/i18n.h>
  19 #include "display/sp-canvas-util.h"
  20 #include "object-edit.h"
  21 #include "sp-path.h"
  22 #include "path-chemistry.h"
  23 #include "rubberband.h"
  24 #include "desktop.h"
  25 #include "desktop-handles.h"
  26 #include "selection.h"
  27 #include "pixmaps/cursor-node.xpm"
  28 #include "message-context.h"
  29 #include "node-context.h"
  30 #include "pixmaps/cursor-node-d.xpm"
  31 #include "prefs-utils.h"
  32 #include "xml/node-event-vector.h"
  33 #include "style.h"
  34 #include "splivarot.h"
  35 #include "shape-editor.h"
  36
  37 static void sp_node_context_class_init(SPNodeContextClass *klass);
  38 static void sp_node_context_init(SPNodeContext *node_context);
  39 static void sp_node_context_dispose(GObject *object);
  40
  41 static void sp_node_context_setup(SPEventContext *ec);
  42 static gint sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  43 static gint sp_node_context_item_handler(SPEventContext *event_context,
  44                                          SPItem *item, GdkEvent *event);
  45
  46 static SPEventContextClass *parent_class;
  47
  48 GType
  49 sp_node_context_get_type()
  50 {
  51     static GType type = 0;
  52     if (!type) {
  53         GTypeInfo info = {
  54             sizeof(SPNodeContextClass),
  55             NULL, NULL,
  56             (GClassInitFunc) sp_node_context_class_init,
  57             NULL, NULL,
  58             sizeof(SPNodeContext),
  59             4,
  60             (GInstanceInitFunc) sp_node_context_init,
  61             NULL,    /* value_table */
  62         };
  63         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPNodeContext", &info, (GTypeFlags)0);
  64     }
  65     return type;
  66 }
  67
  68 static void
  69 sp_node_context_class_init(SPNodeContextClass *klass)
  70 {
  71     GObjectClass *object_class = (GObjectClass *) klass;
  72     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  73
  74     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  75
  76     object_class->dispose = sp_node_context_dispose;
  77
  78     event_context_class->setup = sp_node_context_setup;
  79     event_context_class->root_handler = sp_node_context_root_handler;
  80     event_context_class->item_handler = sp_node_context_item_handler;
  81 }
  82
  83 static void
  84 sp_node_context_init(SPNodeContext *node_context)
  85 {
  86     SPEventContext *event_context = SP_EVENT_CONTEXT(node_context);
  87
  88     event_context->cursor_shape = cursor_node_xpm;
  89     event_context->hot_x = 1;
  90     event_context->hot_y = 1;
  91
  92     node_context->leftalt = FALSE;
  93     node_context->rightalt = FALSE;
  94     node_context->leftctrl = FALSE;
  95     node_context->rightctrl = FALSE;
  96
  97     new (&node_context->sel_changed_connection) sigc::connection();
  98 }
  99
 100 static void
 101 sp_node_context_dispose(GObject *object)
 102 {
 103     SPNodeContext *nc = SP_NODE_CONTEXT(object);
 104     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 105
 106     ec->enableGrDrag(false);
 107
 108     nc->sel_changed_connection.disconnect();
 109     nc->sel_changed_connection.~connection();
 110
 111     delete nc->shape_editor;
 112
 113     if (nc->_node_message_context) {
 114         delete nc->_node_message_context;
 115     }
 116
 117     G_OBJECT_CLASS(parent_class)->dispose(object);
 118 }
 119
 120 static void
 121 sp_node_context_setup(SPEventContext *ec)
 122 {
 123     SPNodeContext *nc = SP_NODE_CONTEXT(ec);
 124
 125     if (((SPEventContextClass *) parent_class)->setup)
 126         ((SPEventContextClass *) parent_class)->setup(ec);
 127
 128     nc->sel_changed_connection.disconnect();
 129     nc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(sigc::bind(sigc::ptr_fun(&sp_node_context_selection_changed), (gpointer)nc));
 130
 131     Inkscape::Selection *selection = sp_desktop_selection(ec->desktop);
 132     SPItem *item = selection->singleItem();
 133
 134     nc->shape_editor = new ShapeEditor(ec->desktop);
 135
 136     nc->rb_escaped = false;
 137
 138     nc->cursor_drag = false;
 139
 140     nc->added_node = false;
 141
 142     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 143
 144     if (item) {
 145         nc->shape_editor->set_item(item);
 146     }
 147
 148     if (prefs_get_int_attribute("tools.nodes", "selcue", 0) != 0) {
 149         ec->enableSelectionCue();
 150     }
 151
 152     if (prefs_get_int_attribute("tools.nodes", "gradientdrag", 0) != 0) {
 153         ec->enableGrDrag();
 154     }
 155
 156     ec->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
 157
 158     nc->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 159
 160     nc->shape_editor->update_statusbar();
 161 }
 162
 163 /**
 164 \brief  Callback that processes the "changed" signal on the selection;
 165 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
 166 */
 167 void
 168 sp_node_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 169 {
 170     SPNodeContext *nc = SP_NODE_CONTEXT(data);
 171
 172     // TODO: update ShapeEditorsCollective instead
 173     nc->shape_editor->unset_item();
 174     SPItem *item = selection->singleItem();
 175     nc->shape_editor->set_item(item);
 176
 177     nc->shape_editor->update_statusbar();
 178 }
 179
 180 void
 181 sp_node_context_show_modifier_tip(SPEventContext *event_context, GdkEvent *event)
 182 {
 183     sp_event_show_modifier_tip
 184         (event_context->defaultMessageContext(), event,
 185          _("<b>Ctrl</b>: toggle node type, snap handle angle, move hor/vert; <b>Ctrl+Alt</b>: move along handles"),
 186          _("<b>Shift</b>: toggle node selection, disable snapping, rotate both handles"),
 187          _("<b>Alt</b>: lock handle length; <b>Ctrl+Alt</b>: move along handles"));
 188 }
 189
 190
 191 static gint
 192 sp_node_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 193 {
 194     gint ret = FALSE;
 195
 196     if (((SPEventContextClass *) parent_class)->item_handler)
 197         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 198
 199     return ret;
 200 }
 201
 202 static gint
 203 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 204 {
 205     SPDesktop *desktop = event_context->desktop;
 206     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 207
 208     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
 209     double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 210     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); // read every time, to make prefs changes really live
 211     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 212     double const offset = prefs_get_double_attribute_limited("options.defaultscale", "value", 2, 0, 1000);
 213
 214     gint ret = FALSE;
 215     switch (event->type) {
 216         case GDK_BUTTON_PRESS:
 217             if (event->button.button == 1 && !event_context->space_panning) {
 218                 // save drag origin
 219                 event_context->xp = (gint) event->button.x;
 220                 event_context->yp = (gint) event->button.y;
 221                 event_context->within_tolerance = true;
 222                 nc->shape_editor->cancel_hit();
 223
 224                 if (!(event->button.state & GDK_SHIFT_MASK)) {
 225                     if (!nc->drag) {
 226                         if (nc->shape_editor->has_nodepath() && selection->single() /* && item_over */) {
 227                             // save drag origin
 228                             bool over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), true);
 229                             //only dragging curves
 230                             if (over_stroke) {
 231                                 ret = TRUE;
 232                                 break;
 233                             }
 234                         }
 235                     }
 236                 }
 237                 NR::Point const button_w(event->button.x,
 238                                          event->button.y);
 239                 NR::Point const button_dt(desktop->w2d(button_w));
 240                 Inkscape::Rubberband::get()->start(desktop, button_dt);
 241                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 242                 desktop->updateNow();
 243                 ret = TRUE;
 244             }
 245             break;
 246         case GDK_MOTION_NOTIFY:
 247             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 248
 249                 if ( event_context->within_tolerance
 250                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 251                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 252                     break; // do not drag if we're within tolerance from origin
 253                 }
 254
 255                 // The path went away while dragging; throw away any further motion
 256                 // events until the mouse pointer is released.
 257
 258                 if (nc->shape_editor->hits_curve() && !nc->shape_editor->has_nodepath()) {
 259                   break;
 260                 }
 261
 262                 // Once the user has moved farther than tolerance from the original location
 263                 // (indicating they intend to move the object, not click), then always process the
 264                 // motion notify coordinates as given (no snapping back to origin)
 265                 event_context->within_tolerance = false;
 266
 267                 // Once we determine what the user is doing (dragging either a node or the
 268                 // selection rubberband), make sure we continue to perform that operation
 269                 // until the mouse pointer is lifted.
 270                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
 271                     if (nc->shape_editor->hits_curve() && nc->shape_editor->has_nodepath()) {
 272                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
 273                     } else {
 274                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
 275                     }
 276                 }
 277
 278                 switch (nc->current_state) {
 279                     case SP_NODE_CONTEXT_NODE_DRAGGING:
 280                         {
 281                             nc->shape_editor->curve_drag (event->motion.x, event->motion.y);
 282
 283                             gobble_motion_events(GDK_BUTTON1_MASK);
 284                             break;
 285                         }
 286                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
 287                         if (Inkscape::Rubberband::get()->is_started()) {
 288                             NR::Point const motion_w(event->motion.x,
 289                                                 event->motion.y);
 290                             NR::Point const motion_dt(desktop->w2d(motion_w));
 291                             Inkscape::Rubberband::get()->move(motion_dt);
 292                         }
 293                         break;
 294                 }
 295
 296                 nc->drag = TRUE;
 297                 ret = TRUE;
 298             } else {
 299                 if (!nc->shape_editor->has_nodepath() || selection->singleItem() == NULL) {
 300                     break;
 301                 }
 302
 303                 bool over_stroke = false;
 304                 over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->motion.x, event->motion.y), false);
 305
 306                 if (nc->cursor_drag && !over_stroke) {
 307                     event_context->cursor_shape = cursor_node_xpm;
 308                     event_context->hot_x = 1;
 309                     event_context->hot_y = 1;
 310                     sp_event_context_update_cursor(event_context);
 311                     nc->cursor_drag = false;
 312                 } else if (!nc->cursor_drag && over_stroke) {
 313                     event_context->cursor_shape = cursor_node_d_xpm;
 314                     event_context->hot_x = 1;
 315                     event_context->hot_y = 1;
 316                     sp_event_context_update_cursor(event_context);
 317                     nc->cursor_drag = true;
 318                 }
 319             }
 320             break;
 321
 322         case GDK_2BUTTON_PRESS:
 323         case GDK_BUTTON_RELEASE:
 324             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
 325                 // find out clicked item, disregarding groups, honoring Alt
 326                 SPItem *item_clicked = sp_event_context_find_item (desktop,
 327                         NR::Point(event->button.x, event->button.y),
 328                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
 329
 330                 event_context->xp = event_context->yp = 0;
 331
 332                 bool over_stroke = false;
 333                 if (nc->shape_editor->has_nodepath()) {
 334                     over_stroke = nc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), false);
 335                 }
 336
 337                 if (item_clicked || over_stroke) {
 338                     if (over_stroke || nc->added_node) {
 339                         switch (event->type) {
 340                             case GDK_BUTTON_RELEASE:
 341                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
 342                                     //add a node
 343                                     nc->shape_editor->add_node_near_point();
 344                                 } else {
 345                                     if (nc->added_node) { // we just received double click, ignore release
 346                                         nc->added_node = false;
 347                                         break;
 348                                     }
 349                                     //select the segment
 350                                     if (event->button.state & GDK_SHIFT_MASK) {
 351                                         nc->shape_editor->select_segment_near_point(true);
 352                                     } else {
 353                                         nc->shape_editor->select_segment_near_point(false);
 354                                     }
 355                                     desktop->updateNow();
 356                                 }
 357                                 break;
 358                             case GDK_2BUTTON_PRESS:
 359                                 //add a node
 360                                 nc->shape_editor->add_node_near_point();
 361                                 nc->added_node = true;
 362                                 break;
 363                             default:
 364                                 break;
 365                         }
 366                     } else if (event->button.state & GDK_SHIFT_MASK) {
 367                         selection->toggle(item_clicked);
 368                         desktop->updateNow();
 369                     } else {
 370                         selection->set(item_clicked);
 371                         desktop->updateNow();
 372                     }
 373                     Inkscape::Rubberband::get()->stop();
 374                     ret = TRUE;
 375                     break;
 376                 }
 377             }
 378             if (event->type == GDK_BUTTON_RELEASE) {
 379                 event_context->xp = event_context->yp = 0;
 380                 if (event->button.button == 1) {
 381                     NR::Maybe<NR::Rect> b = Inkscape::Rubberband::get()->getRectangle();
 382
 383                     if (nc->shape_editor->hits_curve() && !event_context->within_tolerance) { //drag curve
 384                         nc->shape_editor->finish_drag();
 385                     } else if (b && !event_context->within_tolerance) { // drag to select
 386                         nc->shape_editor->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
 387                     } else {
 388                         if (!(nc->rb_escaped)) { // unless something was cancelled
 389                             if (nc->shape_editor->has_selection())
 390                                 nc->shape_editor->deselect();
 391                             else
 392                                 sp_desktop_selection(desktop)->clear();
 393                         }
 394                     }
 395                     ret = TRUE;
 396                     Inkscape::Rubberband::get()->stop();
 397                     desktop->updateNow();
 398                     nc->rb_escaped = false;
 399                     nc->drag = FALSE;
 400                     nc->shape_editor->cancel_hit();
 401                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 402                 }
 403             }
 404             break;
 405         case GDK_KEY_PRESS:
 406             switch (get_group0_keyval(&event->key)) {
 407                 case GDK_Insert:
 408                 case GDK_KP_Insert:
 409                     // with any modifiers
 410                     nc->shape_editor->add_node();
 411                     ret = TRUE;
 412                     break;
 413                 case GDK_Delete:
 414                 case GDK_KP_Delete:
 415                 case GDK_BackSpace:
 416                     if (MOD__CTRL_ONLY) {
 417                         nc->shape_editor->delete_nodes();
 418                     } else {
 419                         nc->shape_editor->delete_nodes_preserving_shape();
 420                     }
 421                     ret = TRUE;
 422                     break;
 423                 case GDK_C:
 424                 case GDK_c:
 425                     if (MOD__SHIFT_ONLY) {
 426                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_CUSP);
 427                         ret = TRUE;
 428                     }
 429                     break;
 430                 case GDK_S:
 431                 case GDK_s:
 432                     if (MOD__SHIFT_ONLY) {
 433                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
 434                         ret = TRUE;
 435                     }
 436                     break;
 437                 case GDK_Y:
 438                 case GDK_y:
 439                     if (MOD__SHIFT_ONLY) {
 440                         nc->shape_editor->set_node_type(Inkscape::NodePath::NODE_SYMM);
 441                         ret = TRUE;
 442                     }
 443                     break;
 444                 case GDK_B:
 445                 case GDK_b:
 446                     if (MOD__SHIFT_ONLY) {
 447                         nc->shape_editor->break_at_nodes();
 448                         ret = TRUE;
 449                     }
 450                     break;
 451                 case GDK_J:
 452                 case GDK_j:
 453                     if (MOD__SHIFT_ONLY) {
 454                         nc->shape_editor->join_nodes();
 455                         ret = TRUE;
 456                     }
 457                     break;
 458                 case GDK_D:
 459                 case GDK_d:
 460                     if (MOD__SHIFT_ONLY) {
 461                         nc->shape_editor->duplicate_nodes();
 462                         ret = TRUE;
 463                     }
 464                     break;
 465                 case GDK_L:
 466                 case GDK_l:
 467                     if (MOD__SHIFT_ONLY) {
 468                         nc->shape_editor->set_type_of_segments(NR_LINETO);
 469                         ret = TRUE;
 470                     }
 471                     break;
 472                 case GDK_U:
 473                 case GDK_u:
 474                     if (MOD__SHIFT_ONLY) {
 475                         nc->shape_editor->set_type_of_segments(NR_CURVETO);
 476                         ret = TRUE;
 477                     }
 478                     break;
 479                 case GDK_R:
 480                 case GDK_r:
 481                     if (MOD__SHIFT_ONLY) {
 482                         // FIXME: add top panel button
 483                         sp_selected_path_reverse();
 484                         ret = TRUE;
 485                     }
 486                     break;
 487                 case GDK_x:
 488                 case GDK_X:
 489                     if (MOD__ALT_ONLY) {
 490                         desktop->setToolboxFocusTo ("altx-nodes");
 491                         ret = TRUE;
 492                     }
 493                     break;
 494                 case GDK_Left: // move selection left
 495                 case GDK_KP_Left:
 496                 case GDK_KP_4:
 497                     if (!MOD__CTRL) { // not ctrl
 498                         gint mul = 1 + gobble_key_events(
 499                             get_group0_keyval(&event->key), 0); // with any mask
 500                         if (MOD__ALT) { // alt
 501                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*-10, 0); // shift
 502                             else nc->shape_editor->move_nodes_screen(mul*-1, 0); // no shift
 503                         }
 504                         else { // no alt
 505                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*-10*nudge, 0); // shift
 506                             else nc->shape_editor->move_nodes(mul*-nudge, 0); // no shift
 507                         }
 508                         ret = TRUE;
 509                     }
 510                     break;
 511                 case GDK_Up: // move selection up
 512                 case GDK_KP_Up:
 513                 case GDK_KP_8:
 514                     if (!MOD__CTRL) { // not ctrl
 515                         gint mul = 1 + gobble_key_events(
 516                             get_group0_keyval(&event->key), 0); // with any mask
 517                         if (MOD__ALT) { // alt
 518                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*10); // shift
 519                             else nc->shape_editor->move_nodes_screen(0, mul*1); // no shift
 520                         }
 521                         else { // no alt
 522                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*10*nudge); // shift
 523                             else nc->shape_editor->move_nodes(0, mul*nudge); // no shift
 524                         }
 525                         ret = TRUE;
 526                     }
 527                     break;
 528                 case GDK_Right: // move selection right
 529                 case GDK_KP_Right:
 530                 case GDK_KP_6:
 531                     if (!MOD__CTRL) { // not ctrl
 532                         gint mul = 1 + gobble_key_events(
 533                             get_group0_keyval(&event->key), 0); // with any mask
 534                         if (MOD__ALT) { // alt
 535                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(mul*10, 0); // shift
 536                             else nc->shape_editor->move_nodes_screen(mul*1, 0); // no shift
 537                         }
 538                         else { // no alt
 539                             if (MOD__SHIFT) nc->shape_editor->move_nodes(mul*10*nudge, 0); // shift
 540                             else nc->shape_editor->move_nodes(mul*nudge, 0); // no shift
 541                         }
 542                         ret = TRUE;
 543                     }
 544                     break;
 545                 case GDK_Down: // move selection down
 546                 case GDK_KP_Down:
 547                 case GDK_KP_2:
 548                     if (!MOD__CTRL) { // not ctrl
 549                         gint mul = 1 + gobble_key_events(
 550                             get_group0_keyval(&event->key), 0); // with any mask
 551                         if (MOD__ALT) { // alt
 552                             if (MOD__SHIFT) nc->shape_editor->move_nodes_screen(0, mul*-10); // shift
 553                             else nc->shape_editor->move_nodes_screen(0, mul*-1); // no shift
 554                         }
 555                         else { // no alt
 556                             if (MOD__SHIFT) nc->shape_editor->move_nodes(0, mul*-10*nudge); // shift
 557                             else nc->shape_editor->move_nodes(0, mul*-nudge); // no shift
 558                         }
 559                         ret = TRUE;
 560                     }
 561                     break;
 562                 case GDK_Escape:
 563                 {
 564                     NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 565                     if (b) {
 566                         Inkscape::Rubberband::get()->stop();
 567                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
 568                         nc->rb_escaped = true;
 569                     } else {
 570                         if (nc->shape_editor->has_selection()) {
 571                             nc->shape_editor->deselect();
 572                         } else {
 573                             sp_desktop_selection(desktop)->clear();
 574                         }
 575                     }
 576                     ret = TRUE;
 577                     break;
 578                 }
 579
 580                 case GDK_bracketleft:
 581                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 582                         if (nc->leftctrl)
 583                             nc->shape_editor->rotate_nodes (M_PI/snaps, -1, false);
 584                         if (nc->rightctrl)
 585                             nc->shape_editor->rotate_nodes (M_PI/snaps, 1, false);
 586                     } else if ( MOD__ALT && !MOD__CTRL ) {
 587                         if (nc->leftalt && nc->rightalt)
 588                             nc->shape_editor->rotate_nodes (1, 0, true);
 589                         else {
 590                             if (nc->leftalt)
 591                                 nc->shape_editor->rotate_nodes (1, -1, true);
 592                             if (nc->rightalt)
 593                                 nc->shape_editor->rotate_nodes (1, 1, true);
 594                         }
 595                     } else if ( snaps != 0 ) {
 596                         nc->shape_editor->rotate_nodes (M_PI/snaps, 0, false);
 597                     }
 598                     ret = TRUE;
 599                     break;
 600                 case GDK_bracketright:
 601                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
 602                         if (nc->leftctrl)
 603                             nc->shape_editor->rotate_nodes (-M_PI/snaps, -1, false);
 604                         if (nc->rightctrl)
 605                             nc->shape_editor->rotate_nodes (-M_PI/snaps, 1, false);
 606                     } else if ( MOD__ALT && !MOD__CTRL ) {
 607                         if (nc->leftalt && nc->rightalt)
 608                             nc->shape_editor->rotate_nodes (-1, 0, true);
 609                         else {
 610                             if (nc->leftalt)
 611                                 nc->shape_editor->rotate_nodes (-1, -1, true);
 612                             if (nc->rightalt)
 613                                 nc->shape_editor->rotate_nodes (-1, 1, true);
 614                         }
 615                     } else if ( snaps != 0 ) {
 616                         nc->shape_editor->rotate_nodes (-M_PI/snaps, 0, false);
 617                     }
 618                     ret = TRUE;
 619                     break;
 620                 case GDK_less:
 621                 case GDK_comma:
 622                     if (MOD__CTRL) {
 623                         if (nc->leftctrl)
 624                             nc->shape_editor->scale_nodes(-offset, -1);
 625                         if (nc->rightctrl)
 626                             nc->shape_editor->scale_nodes(-offset, 1);
 627                     } else if (MOD__ALT) {
 628                         if (nc->leftalt && nc->rightalt)
 629                             nc->shape_editor->scale_nodes_screen (-1, 0);
 630                         else {
 631                             if (nc->leftalt)
 632                                 nc->shape_editor->scale_nodes_screen (-1, -1);
 633                             if (nc->rightalt)
 634                                 nc->shape_editor->scale_nodes_screen (-1, 1);
 635                         }
 636                     } else {
 637                         nc->shape_editor->scale_nodes (-offset, 0);
 638                     }
 639                     ret = TRUE;
 640                     break;
 641                 case GDK_greater:
 642                 case GDK_period:
 643                     if (MOD__CTRL) {
 644                         if (nc->leftctrl)
 645                             nc->shape_editor->scale_nodes (offset, -1);
 646                         if (nc->rightctrl)
 647                             nc->shape_editor->scale_nodes (offset, 1);
 648                     } else if (MOD__ALT) {
 649                         if (nc->leftalt && nc->rightalt)
 650                             nc->shape_editor->scale_nodes_screen (1, 0);
 651                         else {
 652                             if (nc->leftalt)
 653                                 nc->shape_editor->scale_nodes_screen (1, -1);
 654                             if (nc->rightalt)
 655                                 nc->shape_editor->scale_nodes_screen (1, 1);
 656                         }
 657                     } else {
 658                         nc->shape_editor->scale_nodes (offset, 0);
 659                     }
 660                     ret = TRUE;
 661                     break;
 662
 663                 case GDK_Alt_L:
 664                     nc->leftalt = TRUE;
 665                     sp_node_context_show_modifier_tip(event_context, event);
 666                     break;
 667                 case GDK_Alt_R:
 668                     nc->rightalt = TRUE;
 669                     sp_node_context_show_modifier_tip(event_context, event);
 670                     break;
 671                 case GDK_Control_L:
 672                     nc->leftctrl = TRUE;
 673                     sp_node_context_show_modifier_tip(event_context, event);
 674                     break;
 675                 case GDK_Control_R:
 676                     nc->rightctrl = TRUE;
 677                     sp_node_context_show_modifier_tip(event_context, event);
 678                     break;
 679                 case GDK_Shift_L:
 680                 case GDK_Shift_R:
 681                 case GDK_Meta_L:
 682                 case GDK_Meta_R:
 683                     sp_node_context_show_modifier_tip(event_context, event);
 684                     break;
 685                 default:
 686                     ret = node_key(event);
 687                     break;
 688             }
 689             break;
 690         case GDK_KEY_RELEASE:
 691             switch (get_group0_keyval(&event->key)) {
 692                 case GDK_Alt_L:
 693                     nc->leftalt = FALSE;
 694                     event_context->defaultMessageContext()->clear();
 695                     break;
 696                 case GDK_Alt_R:
 697                     nc->rightalt = FALSE;
 698                     event_context->defaultMessageContext()->clear();
 699                     break;
 700                 case GDK_Control_L:
 701                     nc->leftctrl = FALSE;
 702                     event_context->defaultMessageContext()->clear();
 703                     break;
 704                 case GDK_Control_R:
 705                     nc->rightctrl = FALSE;
 706                     event_context->defaultMessageContext()->clear();
 707                     break;
 708                 case GDK_Shift_L:
 709                 case GDK_Shift_R:
 710                 case GDK_Meta_L:
 711                 case GDK_Meta_R:
 712                     event_context->defaultMessageContext()->clear();
 713                     break;
 714             }
 715             break;
 716         default:
 717             break;
 718     }
 719
 720     if (!ret) {
 721         if (((SPEventContextClass *) parent_class)->root_handler)
 722             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 723     }
 724
 725     return ret;
 726 }
 727
 728
 729 /*
 730   Local Variables:
 731   mode:c++
 732   c-file-style:"stroustrup"
 733   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 734   indent-tabs-mode:nil
 735   fill-column:99
 736   End:
 737 */
 738 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :