src/select-context.cpp

   1 /*
   2  * Selection and transformation context
   3  *
   4  * Authors:
   5  *   Lauris Kaplinski <lauris@kaplinski.com>
   6  *   bulia byak <buliabyak@users.sf.net>
   7  *   Abhishek Sharma
   8  *   Jon A. Cruz <jon@joncruz.org>
   9  *
  10  * Copyright (C) 2010      authors
  11  * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  12  * Copyright (C) 1999-2005 Authors
  13  *
  14  * Released under GNU GPL, read the file 'COPYING' for more information
  15  */
  16
  17 #ifdef HAVE_CONFIG_H
  18 # include "config.h"
  19 #endif
  20 #include <cstring>
  21 #include <string>
  22 #include <gdk/gdkkeysyms.h>
  23 #include "macros.h"
  24 #include "rubberband.h"
  25 #include "document.h"
  26 #include "selection.h"
  27 #include "seltrans-handles.h"
  28 #include "sp-cursor.h"
  29 #include "pixmaps/cursor-select-m.xpm"
  30 #include "pixmaps/cursor-select-d.xpm"
  31 #include "pixmaps/handles.xpm"
  32 #include <glibmm/i18n.h>
  33
  34 #include "select-context.h"
  35 #include "selection-chemistry.h"
  36 #include "desktop.h"
  37 #include "desktop-handles.h"
  38 #include "sp-root.h"
  39 #include "preferences.h"
  40 #include "tools-switch.h"
  41 #include "message-stack.h"
  42 #include "selection-describer.h"
  43 #include "seltrans.h"
  44 #include "box3d.h"
  45 #include "display/sp-canvas.h"
  46 #include "display/nr-arena-item.h"
  47
  48 using Inkscape::DocumentUndo;
  49
  50 static void sp_select_context_class_init(SPSelectContextClass *klass);
  51 static void sp_select_context_init(SPSelectContext *select_context);
  52 static void sp_select_context_dispose(GObject *object);
  53
  54 static void sp_select_context_setup(SPEventContext *ec);
  55 static void sp_select_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
  56 static gint sp_select_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  57 static gint sp_select_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  58
  59 static SPEventContextClass *parent_class;
  60
  61 static GdkCursor *CursorSelectMouseover = NULL;
  62 static GdkCursor *CursorSelectDragging = NULL;
  63 GdkPixbuf *handles[13];
  64
  65 static gint rb_escaped = 0; // if non-zero, rubberband was canceled by esc, so the next button release should not deselect
  66 static gint drag_escaped = 0; // if non-zero, drag was canceled by esc
  67
  68 static gint xp = 0, yp = 0; // where drag started
  69 static gint tolerance = 0;
  70 static bool within_tolerance = false;
  71
  72 GtkType
  73 sp_select_context_get_type(void)
  74 {
  75     static GType type = 0;
  76     if (!type) {
  77         GTypeInfo info = {
  78             sizeof(SPSelectContextClass),
  79             NULL, NULL,
  80             (GClassInitFunc) sp_select_context_class_init,
  81             NULL, NULL,
  82             sizeof(SPSelectContext),
  83             4,
  84             (GInstanceInitFunc) sp_select_context_init,
  85             NULL,   /* value_table */
  86         };
  87         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPSelectContext", &info, (GTypeFlags)0);
  88     }
  89     return type;
  90 }
  91
  92 static void
  93 sp_select_context_class_init(SPSelectContextClass *klass)
  94 {
  95     GObjectClass *object_class = (GObjectClass *) klass;
  96     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  97
  98     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  99
 100     object_class->dispose = sp_select_context_dispose;
 101
 102     event_context_class->setup = sp_select_context_setup;
 103     event_context_class->set = sp_select_context_set;
 104     event_context_class->root_handler = sp_select_context_root_handler;
 105     event_context_class->item_handler = sp_select_context_item_handler;
 106 }
 107
 108 static void
 109 sp_select_context_init(SPSelectContext *sc)
 110 {
 111     sc->dragging = FALSE;
 112     sc->moved = FALSE;
 113     sc->button_press_shift = false;
 114     sc->button_press_ctrl = false;
 115     sc->button_press_alt = false;
 116     sc->cycling_items = NULL;
 117     sc->cycling_items_selected_before = NULL;
 118     sc->cycling_cur_item = NULL;
 119     sc->_seltrans = NULL;
 120     sc->_describer = NULL;
 121
 122     // cursors in select context
 123     CursorSelectMouseover = sp_cursor_new_from_xpm(cursor_select_m_xpm , 1, 1);
 124     CursorSelectDragging = sp_cursor_new_from_xpm(cursor_select_d_xpm , 1, 1);
 125     // selection handles
 126     handles[0]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_nw_xpm);
 127     handles[1]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_ne_xpm);
 128     handles[2]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_h_xpm);
 129     handles[3]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_v_xpm);
 130     handles[4]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_nw_xpm);
 131     handles[5]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_n_xpm);
 132     handles[6]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_ne_xpm);
 133     handles[7]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_e_xpm);
 134     handles[8]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_se_xpm);
 135     handles[9]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_s_xpm);
 136     handles[10] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_sw_xpm);
 137     handles[11] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_w_xpm);
 138     handles[12] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_center_xpm);
 139 }
 140
 141 static void
 142 sp_select_context_dispose(GObject *object)
 143 {
 144     SPSelectContext *sc = SP_SELECT_CONTEXT(object);
 145     SPEventContext * ec = SP_EVENT_CONTEXT (object);
 146
 147     ec->enableGrDrag(false);
 148
 149     if (sc->grabbed) {
 150         sp_canvas_item_ungrab(sc->grabbed, GDK_CURRENT_TIME);
 151         sc->grabbed = NULL;
 152     }
 153
 154     delete sc->_seltrans;
 155     sc->_seltrans = NULL;
 156     delete sc->_describer;
 157     sc->_describer = NULL;
 158
 159     if (CursorSelectDragging) {
 160         gdk_cursor_unref (CursorSelectDragging);
 161         CursorSelectDragging = NULL;
 162     }
 163     if (CursorSelectMouseover) {
 164         gdk_cursor_unref (CursorSelectMouseover);
 165         CursorSelectMouseover = NULL;
 166     }
 167
 168     G_OBJECT_CLASS(parent_class)->dispose(object);
 169 }
 170
 171 static void
 172 sp_select_context_setup(SPEventContext *ec)
 173 {
 174     SPSelectContext *select_context = SP_SELECT_CONTEXT(ec);
 175
 176     if (((SPEventContextClass *) parent_class)->setup) {
 177         ((SPEventContextClass *) parent_class)->setup(ec);
 178     }
 179
 180     SPDesktop *desktop = ec->desktop;
 181
 182     select_context->_describer = new Inkscape::SelectionDescriber(
 183                 desktop->selection,
 184                 desktop->messageStack(),
 185                 _("Click selection to toggle scale/rotation handles"),
 186                 _("No objects selected. Click, Shift+click, Alt+scroll mouse on top of objects, or drag around objects to select.")
 187         );
 188
 189     select_context->_seltrans = new Inkscape::SelTrans(desktop);
 190
 191     sp_event_context_read(ec, "show");
 192     sp_event_context_read(ec, "transform");
 193
 194     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 195     if (prefs->getBool("/tools/select/gradientdrag")) {
 196         ec->enableGrDrag();
 197     }
 198 }
 199
 200 static void
 201 sp_select_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val)
 202 {
 203     SPSelectContext *sc = SP_SELECT_CONTEXT(ec);
 204     Glib::ustring path = val->getEntryName();
 205
 206     if (path == "show") {
 207         if (val->getString() == "outline") {
 208             sc->_seltrans->setShow(Inkscape::SelTrans::SHOW_OUTLINE);
 209         } else {
 210             sc->_seltrans->setShow(Inkscape::SelTrans::SHOW_CONTENT);
 211         }
 212     }
 213 }
 214
 215 static bool
 216 sp_select_context_abort(SPEventContext *event_context)
 217 {
 218     SPDesktop *desktop = event_context->desktop;
 219     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 220     Inkscape::SelTrans *seltrans = sc->_seltrans;
 221
 222     if (sc->dragging) {
 223         if (sc->moved) { // cancel dragging an object
 224             seltrans->ungrab();
 225             sc->moved = FALSE;
 226             sc->dragging = FALSE;
 227             sp_event_context_discard_delayed_snap_event(event_context);
 228             drag_escaped = 1;
 229
 230             if (sc->item) {
 231                 // only undo if the item is still valid
 232                 if (SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))) {
 233                     DocumentUndo::undo(sp_desktop_document(desktop));
 234                 }
 235
 236                 sp_object_unref( SP_OBJECT(sc->item), NULL);
 237             } else if (sc->button_press_ctrl) {
 238                 // NOTE:  This is a workaround to a bug.
 239                 // When the ctrl key is held, sc->item is not defined
 240                 // so in this case (only), we skip the object doc check
 241                 DocumentUndo::undo(sp_desktop_document(desktop));
 242             }
 243             sc->item = NULL;
 244
 245             SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Move canceled."));
 246             return true;
 247         }
 248     } else {
 249         if (Inkscape::Rubberband::get(desktop)->is_started()) {
 250             Inkscape::Rubberband::get(desktop)->stop();
 251             rb_escaped = 1;
 252             SP_EVENT_CONTEXT(sc)->defaultMessageContext()->clear();
 253             SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selection canceled."));
 254             return true;
 255         }
 256     }
 257     return false;
 258 }
 259
 260 bool
 261 key_is_a_modifier (guint key) {
 262     return (key == GDK_Alt_L ||
 263                 key == GDK_Alt_R ||
 264                 key == GDK_Control_L ||
 265                 key == GDK_Control_R ||
 266                 key == GDK_Shift_L ||
 267                 key == GDK_Shift_R ||
 268                 key == GDK_Meta_L ||  // Meta is when you press Shift+Alt (at least on my machine)
 269             key == GDK_Meta_R);
 270 }
 271
 272 void
 273 sp_select_context_up_one_layer(SPDesktop *desktop)
 274 {
 275     /* Click in empty place, go up one level -- but don't leave a layer to root.
 276      *
 277      * (Rationale: we don't usually allow users to go to the root, since that
 278      * detracts from the layer metaphor: objects at the root level can in front
 279      * of or behind layers.  Whereas it's fine to go to the root if editing
 280      * a document that has no layers (e.g. a non-Inkscape document).)
 281      *
 282      * Once we support editing SVG "islands" (e.g. <svg> embedded in an xhtml
 283      * document), we might consider further restricting the below to disallow
 284      * leaving a layer to go to a non-layer.
 285      */
 286     SPObject *const current_layer = desktop->currentLayer();
 287     if (current_layer) {
 288         SPObject *const parent = SP_OBJECT_PARENT(current_layer);
 289         if ( parent
 290              && ( SP_OBJECT_PARENT(parent)
 291                   || !( SP_IS_GROUP(current_layer)
 292                         && ( SPGroup::LAYER
 293                              == SP_GROUP(current_layer)->layerMode() ) ) ) )
 294         {
 295             desktop->setCurrentLayer(parent);
 296             if (SP_IS_GROUP(current_layer) && SPGroup::LAYER != SP_GROUP(current_layer)->layerMode())
 297                 sp_desktop_selection(desktop)->set(current_layer);
 298         }
 299     }
 300 }
 301
 302 static gint
 303 sp_select_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 304 {
 305     gint ret = FALSE;
 306
 307     SPDesktop *desktop = event_context->desktop;
 308     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 309     Inkscape::SelTrans *seltrans = sc->_seltrans;
 310
 311     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 312     tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 313
 314     // make sure we still have valid objects to move around
 315     if (sc->item && SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))==NULL) {
 316         sp_select_context_abort(event_context);
 317     }
 318
 319     switch (event->type) {
 320         case GDK_BUTTON_PRESS:
 321             if (event->button.button == 1 && !event_context->space_panning) {
 322                 /* Left mousebutton */
 323
 324                 // save drag origin
 325                 xp = (gint) event->button.x;
 326                 yp = (gint) event->button.y;
 327                 within_tolerance = true;
 328
 329                 // remember what modifiers were on before button press
 330                 sc->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
 331                 sc->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
 332                 sc->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
 333
 334                 if (event->button.state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK)) {
 335                     // if shift or ctrl was pressed, do not move objects;
 336                     // pass the event to root handler which will perform rubberband, shift-click, ctrl-click, ctrl-drag
 337                 } else {
 338                     sc->dragging = TRUE;
 339                     sc->moved = FALSE;
 340
 341                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, CursorSelectDragging);
 342
 343                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 344
 345                     // remember the clicked item in sc->item:
 346                     if (sc->item) {
 347                         sp_object_unref(sc->item, NULL);
 348                         sc->item = NULL;
 349                     }
 350                     sc->item = sp_event_context_find_item (desktop,
 351                                               Geom::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, FALSE);
 352                     sp_object_ref(sc->item, NULL);
 353
 354                     rb_escaped = drag_escaped = 0;
 355
 356                     if (sc->grabbed) {
 357                         sp_canvas_item_ungrab(sc->grabbed, event->button.time);
 358                         sc->grabbed = NULL;
 359                     }
 360                     sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->drawing),
 361                                         GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
 362                                         GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK,
 363                                         NULL, event->button.time);
 364                     sc->grabbed = SP_CANVAS_ITEM(desktop->drawing);
 365
 366                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 367
 368                     ret = TRUE;
 369                 }
 370             } else if (event->button.button == 3) {
 371                 // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
 372                 sp_select_context_abort(event_context);
 373             }
 374             break;
 375
 376         case GDK_ENTER_NOTIFY:
 377         {
 378             if (!desktop->isWaitingCursor() && !sc->dragging) {
 379                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, CursorSelectMouseover);
 380             }
 381             break;
 382         }
 383
 384         case GDK_LEAVE_NOTIFY:
 385             if (!desktop->isWaitingCursor() && !sc->dragging)
 386                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, event_context->cursor);
 387             break;
 388
 389         case GDK_KEY_PRESS:
 390             if (get_group0_keyval (&event->key) == GDK_space) {
 391                 if (sc->dragging && sc->grabbed) {
 392                     /* stamping mode: show content mode moving */
 393                     seltrans->stamp();
 394                     ret = TRUE;
 395                 }
 396             }
 397             break;
 398
 399         default:
 400             break;
 401     }
 402
 403     if (!ret) {
 404         if (((SPEventContextClass *) parent_class)->item_handler)
 405             ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 406     }
 407
 408     return ret;
 409 }
 410
 411 static void
 412 sp_select_context_cycle_through_items(SPSelectContext *sc, Inkscape::Selection *selection, GdkEventScroll *scroll_event, bool shift_pressed) {
 413     if (!sc->cycling_cur_item)
 414         return;
 415
 416     NRArenaItem *arenaitem;
 417     SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop;
 418     SPItem *item = SP_ITEM(sc->cycling_cur_item->data);
 419
 420     // Deactivate current item
 421     if (!g_list_find(sc->cycling_items_selected_before, item) && selection->includes(item))
 422         selection->remove(item);
 423     arenaitem = item->get_arenaitem(desktop->dkey);
 424     nr_arena_item_set_opacity (arenaitem, 0.3);
 425
 426     // Find next item and activate it
 427     GList *next;
 428     if (scroll_event->direction == GDK_SCROLL_UP) {
 429         next = sc->cycling_cur_item->next;
 430         if (next == NULL)
 431             next = sc->cycling_items;
 432     } else {
 433         next = sc->cycling_cur_item->prev;
 434         if (next == NULL)
 435             next = g_list_last(sc->cycling_items);
 436     }
 437     sc->cycling_cur_item = next;
 438     item = SP_ITEM(sc->cycling_cur_item->data);
 439     arenaitem = item->get_arenaitem(desktop->dkey);
 440     nr_arena_item_set_opacity (arenaitem, 1.0);
 441
 442     if (shift_pressed)
 443         selection->add(item);
 444     else
 445         selection->set(item);
 446 }
 447
 448 static gint
 449 sp_select_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 450 {
 451     SPItem *item = NULL;
 452     SPItem *item_at_point = NULL, *group_at_point = NULL, *item_in_group = NULL;
 453     gint ret = FALSE;
 454
 455     SPDesktop *desktop = event_context->desktop;
 456     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 457     Inkscape::SelTrans *seltrans = sc->_seltrans;
 458     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 459     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 460
 461     // make sure we still have valid objects to move around
 462     if (sc->item && SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))==NULL) {
 463         sp_select_context_abort(event_context);
 464     }
 465
 466     switch (event->type) {
 467         case GDK_2BUTTON_PRESS:
 468             if (event->button.button == 1) {
 469                 if (!selection->isEmpty()) {
 470                     SPItem *clicked_item = (SPItem *) selection->itemList()->data;
 471                     if (SP_IS_GROUP(clicked_item) && !SP_IS_BOX3D(clicked_item)) { // enter group if it's not a 3D box
 472                         desktop->setCurrentLayer(reinterpret_cast<SPObject *>(clicked_item));
 473                         sp_desktop_selection(desktop)->clear();
 474                         sc->dragging = false;
 475                         sp_event_context_discard_delayed_snap_event(event_context);
 476
 477                         sp_canvas_end_forced_full_redraws(desktop->canvas);
 478                     } else { // switch tool
 479                         Geom::Point const button_pt(event->button.x, event->button.y);
 480                         Geom::Point const p(desktop->w2d(button_pt));
 481                         tools_switch_by_item (desktop, clicked_item, p);
 482                     }
 483                 } else {
 484                     sp_select_context_up_one_layer(desktop);
 485                 }
 486                 ret = TRUE;
 487             }
 488             break;
 489         case GDK_BUTTON_PRESS:
 490             if (event->button.button == 1 && !event_context->space_panning) {
 491
 492                 // save drag origin
 493                 xp = (gint) event->button.x;
 494                 yp = (gint) event->button.y;
 495                 within_tolerance = true;
 496
 497                 Geom::Point const button_pt(event->button.x, event->button.y);
 498                 Geom::Point const p(desktop->w2d(button_pt));
 499                 if (event->button.state & GDK_MOD1_MASK)
 500                     Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
 501                 Inkscape::Rubberband::get(desktop)->start(desktop, p);
 502                 if (sc->grabbed) {
 503                     sp_canvas_item_ungrab(sc->grabbed, event->button.time);
 504                     sc->grabbed = NULL;
 505                 }
 506                 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 507                                     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,
 508                                     NULL, event->button.time);
 509                 sc->grabbed = SP_CANVAS_ITEM(desktop->acetate);
 510
 511                 // remember what modifiers were on before button press
 512                 sc->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
 513                 sc->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
 514                 sc->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
 515
 516                 sc->moved = FALSE;
 517
 518                 rb_escaped = drag_escaped = 0;
 519
 520                 ret = TRUE;
 521             } else if (event->button.button == 3) {
 522                 // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
 523                 sp_select_context_abort(event_context);
 524             }
 525             break;
 526
 527         case GDK_MOTION_NOTIFY:
 528         {
 529                 tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 530                 if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
 531                 Geom::Point const motion_pt(event->motion.x, event->motion.y);
 532                 Geom::Point const p(desktop->w2d(motion_pt));
 533
 534                 if ( within_tolerance
 535                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
 536                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
 537                     break; // do not drag if we're within tolerance from origin
 538                 }
 539                 // Once the user has moved farther than tolerance from the original location
 540                 // (indicating they intend to move the object, not click), then always process the
 541                 // motion notify coordinates as given (no snapping back to origin)
 542                 within_tolerance = false;
 543
 544                 if (sc->button_press_ctrl || (sc->button_press_alt && !sc->button_press_shift && !selection->isEmpty())) {
 545                     // if it's not click and ctrl or alt was pressed (the latter with some selection
 546                     // but not with shift) we want to drag rather than rubberband
 547                         sc->dragging = TRUE;
 548                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, CursorSelectDragging);
 549
 550                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 551                 }
 552
 553                 if (sc->dragging) {
 554                     /* User has dragged fast, so we get events on root (lauris)*/
 555                     // not only that; we will end up here when ctrl-dragging as well
 556                     // and also when we started within tolerance, but trespassed tolerance outside of item
 557                     Inkscape::Rubberband::get(desktop)->stop();
 558                     SP_EVENT_CONTEXT(sc)->defaultMessageContext()->clear();
 559                     item_at_point = desktop->getItemAtPoint(Geom::Point(event->button.x, event->button.y), FALSE);
 560                     if (!item_at_point) // if no item at this point, try at the click point (bug 1012200)
 561                         item_at_point = desktop->getItemAtPoint(Geom::Point(xp, yp), FALSE);
 562                     if (item_at_point || sc->moved || sc->button_press_alt) {
 563                         // drag only if starting from an item, or if something is already grabbed, or if alt-dragging
 564                         if (!sc->moved) {
 565                             item_in_group = desktop->getItemAtPoint(Geom::Point(event->button.x, event->button.y), TRUE);
 566                             group_at_point = desktop->getGroupAtPoint(Geom::Point(event->button.x, event->button.y));
 567                             if (SP_IS_LAYER(selection->single()))
 568                                 group_at_point = SP_GROUP(selection->single());
 569
 570                             // group-at-point is meant to be topmost item if it's a group,
 571                             // not topmost group of all items at point
 572                             if (group_at_point != item_in_group &&
 573                                 !(group_at_point && item_at_point &&
 574                                   group_at_point->isAncestorOf(item_at_point)))
 575                                 group_at_point = NULL;
 576
 577                             // if neither a group nor an item (possibly in a group) at point are selected, set selection to the item at point
 578                             if ((!item_in_group || !selection->includes(item_in_group)) &&
 579                                 (!group_at_point || !selection->includes(group_at_point))
 580                                 && !sc->button_press_alt) {
 581                                 // select what is under cursor
 582                                 if (!seltrans->isEmpty()) {
 583                                     seltrans->resetState();
 584                                 }
 585                                 // when simply ctrl-dragging, we don't want to go into groups
 586                                 if (item_at_point && !selection->includes(item_at_point))
 587                                     selection->set(item_at_point);
 588                             } // otherwise, do not change selection so that dragging selected-within-group items, as well as alt-dragging, is possible
 589                             seltrans->grab(p, -1, -1, FALSE, TRUE);
 590                             sc->moved = TRUE;
 591                         }
 592                         if (!seltrans->isEmpty())
 593                             seltrans->moveTo(p, event->button.state);
 594                         desktop->scroll_to_point(p);
 595                         gobble_motion_events(GDK_BUTTON1_MASK);
 596                         ret = TRUE;
 597                     } else {
 598                         sc->dragging = FALSE;
 599                         sp_event_context_discard_delayed_snap_event(event_context);
 600                         sp_canvas_end_forced_full_redraws(desktop->canvas);
 601                     }
 602                 } else {
 603                     if (Inkscape::Rubberband::get(desktop)->is_started()) {
 604                         Inkscape::Rubberband::get(desktop)->move(p);
 605                         if (Inkscape::Rubberband::get(desktop)->getMode() == RUBBERBAND_MODE_TOUCHPATH) {
 606                             event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> objects to select them; release <b>Alt</b> to switch to rubberband selection"));
 607                         } else {
 608                             event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Drag around</b> objects to select them; press <b>Alt</b> to switch to touch selection"));
 609                         }
 610                         gobble_motion_events(GDK_BUTTON1_MASK);
 611                     }
 612                 }
 613             }
 614             break;
 615         }
 616         case GDK_BUTTON_RELEASE:
 617             xp = yp = 0;
 618             if ((event->button.button == 1) && (sc->grabbed) && !event_context->space_panning) {
 619                 if (sc->dragging) {
 620                     if (sc->moved) {
 621                         // item has been moved
 622                         seltrans->ungrab();
 623                         sc->moved = FALSE;
 624                     } else if (sc->item && !drag_escaped) {
 625                         // item has not been moved -> simply a click, do selecting
 626                         if (!selection->isEmpty()) {
 627                             if (event->button.state & GDK_SHIFT_MASK) {
 628                                 // with shift, toggle selection
 629                                 seltrans->resetState();
 630                                 selection->toggle(sc->item);
 631                             } else {
 632                                 SPObject* single = selection->single();
 633                                 // without shift, increase state (i.e. toggle scale/rotation handles)
 634                                 if (selection->includes(sc->item)) {
 635                                     seltrans->increaseState();
 636                                 } else if (SP_IS_LAYER(single) && single->isAncestorOf(sc->item)) {
 637                                     seltrans->increaseState();
 638                                 } else {
 639                                     seltrans->resetState();
 640                                     selection->set(sc->item);
 641                                 }
 642                             }
 643                         } else { // simple or shift click, no previous selection
 644                             seltrans->resetState();
 645                             selection->set(sc->item);
 646                         }
 647                     }
 648                     sc->dragging = FALSE;
 649                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, CursorSelectMouseover);
 650                     sp_event_context_discard_delayed_snap_event(event_context);
 651                     sp_canvas_end_forced_full_redraws(desktop->canvas);
 652
 653                     if (sc->item) {
 654                         sp_object_unref( SP_OBJECT(sc->item), NULL);
 655                     }
 656                     sc->item = NULL;
 657                 } else {
 658                     Inkscape::Rubberband *r = Inkscape::Rubberband::get(desktop);
 659                     if (r->is_started() && !within_tolerance) {
 660                         // this was a rubberband drag
 661                         GSList *items = NULL;
 662                         if (r->getMode() == RUBBERBAND_MODE_RECT) {
 663                             Geom::OptRect const b = r->getRectangle();
 664                             items = sp_desktop_document(desktop)->getItemsInBox(desktop->dkey, *b);
 665                         } else if (r->getMode() == RUBBERBAND_MODE_TOUCHPATH) {
 666                             items = sp_desktop_document(desktop)->getItemsAtPoints(desktop->dkey, r->getPoints());
 667                         }
 668
 669                         seltrans->resetState();
 670                         r->stop();
 671                         SP_EVENT_CONTEXT(sc)->defaultMessageContext()->clear();
 672
 673                         if (event->button.state & GDK_SHIFT_MASK) {
 674                             // with shift, add to selection
 675                             selection->addList (items);
 676                         } else {
 677                             // without shift, simply select anew
 678                             selection->setList (items);
 679                         }
 680                         g_slist_free (items);
 681                     } else { // it was just a click, or a too small rubberband
 682                         r->stop();
 683                         if (sc->button_press_shift && !rb_escaped && !drag_escaped) {
 684                             // this was a shift+click or alt+shift+click, select what was clicked upon
 685
 686                             sc->button_press_shift = false;
 687
 688                             if (sc->button_press_ctrl) {
 689                                 // go into groups, honoring Alt
 690                                 item = sp_event_context_find_item (desktop,
 691                                                    Geom::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, TRUE);
 692                                 sc->button_press_ctrl = FALSE;
 693                             } else {
 694                                 // don't go into groups, honoring Alt
 695                                 item = sp_event_context_find_item (desktop,
 696                                                    Geom::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, FALSE);
 697                             }
 698
 699                             if (item) {
 700                                 selection->toggle(item);
 701                                 item = NULL;
 702                             }
 703
 704                         } else if ((sc->button_press_ctrl || sc->button_press_alt) && !rb_escaped && !drag_escaped) { // ctrl+click, alt+click
 705
 706                             item = sp_event_context_find_item (desktop,
 707                                          Geom::Point(event->button.x, event->button.y), sc->button_press_alt, sc->button_press_ctrl);
 708
 709                             sc->button_press_ctrl = FALSE;
 710                             sc->button_press_alt = FALSE;
 711
 712                             if (item) {
 713                                 if (selection->includes(item)) {
 714                                     seltrans->increaseState();
 715                                 } else {
 716                                     seltrans->resetState();
 717                                     selection->set(item);
 718                                 }
 719                                 item = NULL;
 720                             }
 721
 722                         } else { // click without shift, simply deselect, unless with Alt or something was cancelled
 723                             if (!selection->isEmpty()) {
 724                                 if (!(rb_escaped) && !(drag_escaped) && !(event->button.state & GDK_MOD1_MASK))
 725                                     selection->clear();
 726                                 rb_escaped = 0;
 727                                 ret = TRUE;
 728                             }
 729                         }
 730                     }
 731                     ret = TRUE;
 732                 }
 733                 if (sc->grabbed) {
 734                     sp_canvas_item_ungrab(sc->grabbed, event->button.time);
 735                     sc->grabbed = NULL;
 736                 }
 737
 738                 desktop->updateNow();
 739             }
 740             if (event->button.button == 1) {
 741                 Inkscape::Rubberband::get(desktop)->stop(); // might have been started in another tool!
 742             }
 743             sc->button_press_shift = false;
 744             sc->button_press_ctrl = false;
 745             sc->button_press_alt = false;
 746             break;
 747
 748         case GDK_SCROLL:
 749         {
 750             SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 751             GdkEventScroll *scroll_event = (GdkEventScroll*) event;
 752
 753             if (scroll_event->state & GDK_MOD1_MASK) { // alt modified pressed
 754                 bool shift_pressed = scroll_event->state & GDK_SHIFT_MASK;
 755
 756                 /* Rebuild list of items underneath the mouse pointer */
 757                 Geom::Point p = desktop->d2w(desktop->point());
 758                 SPItem *item = desktop->getItemAtPoint(p, true, NULL);
 759
 760                 // Save pointer to current cycle-item so that we can find it again later, in the freshly built list
 761                 SPItem *tmp_cur_item = sc->cycling_cur_item ? SP_ITEM(sc->cycling_cur_item->data) : NULL;
 762                 g_list_free(sc->cycling_items);
 763                 sc->cycling_items = NULL;
 764                 sc->cycling_cur_item = NULL;
 765
 766                 while(item != NULL) {
 767                     sc->cycling_items = g_list_append(sc->cycling_items, item);
 768                     item = desktop->getItemAtPoint(p, true, item);
 769                 }
 770
 771                 /* Compare current item list with item list during previous scroll ... */
 772                 GList *l1, *l2;
 773                 bool item_lists_differ = false;
 774                 // Note that we can do an 'or' comparison in the loop because it is safe to call g_list_next with a NULL pointer.
 775                 for (l1 = sc->cycling_items, l2 = sc->cycling_items_cmp; l1 != NULL || l2 != NULL; l1 = g_list_next(l1), l2 = g_list_next(l2)) {
 776                     if ((l1 !=NULL && l2 == NULL) || (l1 == NULL && l2 != NULL) || (l1->data != l2->data)) {
 777                         item_lists_differ = true;
 778                         break;
 779                     }
 780                 }
 781
 782                 /* If list of items under mouse pointer hasn't changed ... */
 783                 if (!item_lists_differ) {
 784                     // ... find current item in the freshly built list and continue cycling ...
 785                     // TODO: This wouldn't be necessary if cycling_cur_item pointed to an element of cycling_items_cmp instead
 786                     sc->cycling_cur_item = g_list_find(sc->cycling_items, tmp_cur_item);
 787                     g_assert(sc->cycling_cur_item != NULL || sc->cycling_items == NULL);
 788                 } else {
 789                     // ... otherwise reset opacities for outdated items ...
 790                     NRArenaItem *arenaitem;
 791                     for(GList *l = sc->cycling_items_cmp; l != NULL; l = l->next) {
 792                         arenaitem = SP_ITEM(l->data)->get_arenaitem(desktop->dkey);
 793                         nr_arena_item_set_opacity (arenaitem, 1.0);
 794                         //if (!shift_pressed && !g_list_find(sc->cycling_items_selected_before, SP_ITEM(l->data)) && selection->includes(SP_ITEM(l->data)))
 795                         if (!g_list_find(sc->cycling_items_selected_before, SP_ITEM(l->data)) && selection->includes(SP_ITEM(l->data)))
 796                             selection->remove(SP_ITEM(l->data));
 797                     }
 798
 799                     // ... clear the lists ...
 800                     g_list_free(sc->cycling_items_cmp);
 801                     g_list_free(sc->cycling_items_selected_before);
 802                     sc->cycling_items_cmp = NULL;
 803                     sc->cycling_items_selected_before = NULL;
 804                     sc->cycling_cur_item = NULL;
 805
 806                     // ... and rebuild them with the new items.
 807                     sc->cycling_items_cmp = g_list_copy(sc->cycling_items);
 808                     SPItem *item;
 809                     for(GList *l = sc->cycling_items; l != NULL; l = l->next) {
 810                         item = SP_ITEM(l->data);
 811                         arenaitem = item->get_arenaitem(desktop->dkey);
 812                         nr_arena_item_set_opacity (arenaitem, 0.3);
 813                         if (selection->includes(item)) {
 814                             // already selected items are stored separately, too
 815                             sc->cycling_items_selected_before = g_list_append(sc->cycling_items_selected_before, item);
 816                         }
 817                     }
 818
 819                     // set the current item to the bottommost one so that the cycling step below re-starts at the top
 820                     sc->cycling_cur_item = g_list_last(sc->cycling_items);
 821                 }
 822
 823                 // Cycle through the items underneath the mouse pointer, one-by-one
 824                 sp_select_context_cycle_through_items(sc, selection, scroll_event, shift_pressed);
 825
 826                 ret = TRUE;
 827             }
 828             break;
 829         }
 830
 831         case GDK_KEY_PRESS: // keybindings for select context
 832
 833                         {
 834                         {
 835                 guint keyval = get_group0_keyval(&event->key);
 836             bool alt = ( MOD__ALT
 837                                     || (keyval == GDK_Alt_L)
 838                                     || (keyval == GDK_Alt_R)
 839                                     || (keyval == GDK_Meta_L)
 840                                     || (keyval == GDK_Meta_R));
 841
 842             if (!key_is_a_modifier (keyval)) {
 843                     event_context->defaultMessageContext()->clear();
 844             } else if (sc->grabbed || seltrans->isGrabbed()) {
 845                 if (Inkscape::Rubberband::get(desktop)->is_started()) {
 846                     // if Alt then change cursor to moving cursor:
 847                     if (alt) {
 848                         Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_TOUCHPATH);
 849                     }
 850                 } else {
 851                 // do not change the statusbar text when mousekey is down to move or transform the object,
 852                 // because the statusbar text is already updated somewhere else.
 853                    break;
 854                 }
 855             } else {
 856                     sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 857                                                 _("<b>Ctrl</b>: click to select in groups; drag to move hor/vert"),
 858                                                 _("<b>Shift</b>: click to toggle select; drag for rubberband selection"),
 859                                                 _("<b>Alt</b>: click to select under; scroll mouse-wheel to cycle-select; drag to move selected or select by touch"));
 860                     // if Alt and nonempty selection, show moving cursor ("move selected"):
 861                     if (alt && !selection->isEmpty() && !desktop->isWaitingCursor()) {
 862                         gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, CursorSelectDragging);
 863                     }
 864                     //*/
 865                     break;
 866             }
 867                         }
 868
 869             gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000); // in px
 870                         gdouble const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000);
 871                         int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 872
 873                         switch (get_group0_keyval (&event->key)) {
 874                 case GDK_Left: // move selection left
 875                 case GDK_KP_Left:
 876                 case GDK_KP_4:
 877                     if (!MOD__CTRL) { // not ctrl
 878                         gint mul = 1 + gobble_key_events(
 879                             get_group0_keyval(&event->key), 0); // with any mask
 880                         if (MOD__ALT) { // alt
 881                             if (MOD__SHIFT) sp_selection_move_screen(desktop, mul*-10, 0); // shift
 882                             else sp_selection_move_screen(desktop, mul*-1, 0); // no shift
 883                         }
 884                         else { // no alt
 885                             if (MOD__SHIFT) sp_selection_move(desktop, mul*-10*nudge, 0); // shift
 886                             else sp_selection_move(desktop, mul*-nudge, 0); // no shift
 887                         }
 888                         ret = TRUE;
 889                     }
 890                     break;
 891                 case GDK_Up: // move selection up
 892                 case GDK_KP_Up:
 893                 case GDK_KP_8:
 894                     if (!MOD__CTRL) { // not ctrl
 895                         gint mul = 1 + gobble_key_events(
 896                             get_group0_keyval(&event->key), 0); // with any mask
 897                         if (MOD__ALT) { // alt
 898                             if (MOD__SHIFT) sp_selection_move_screen(desktop, 0, mul*10); // shift
 899                             else sp_selection_move_screen(desktop, 0, mul*1); // no shift
 900                         }
 901                         else { // no alt
 902                             if (MOD__SHIFT) sp_selection_move(desktop, 0, mul*10*nudge); // shift
 903                             else sp_selection_move(desktop, 0, mul*nudge); // no shift
 904                         }
 905                         ret = TRUE;
 906                     }
 907                     break;
 908                 case GDK_Right: // move selection right
 909                 case GDK_KP_Right:
 910                 case GDK_KP_6:
 911                     if (!MOD__CTRL) { // not ctrl
 912                         gint mul = 1 + gobble_key_events(
 913                             get_group0_keyval(&event->key), 0); // with any mask
 914                         if (MOD__ALT) { // alt
 915                             if (MOD__SHIFT) sp_selection_move_screen(desktop, mul*10, 0); // shift
 916                             else sp_selection_move_screen(desktop, mul*1, 0); // no shift
 917                         }
 918                         else { // no alt
 919                             if (MOD__SHIFT) sp_selection_move(desktop, mul*10*nudge, 0); // shift
 920                             else sp_selection_move(desktop, mul*nudge, 0); // no shift
 921                         }
 922                         ret = TRUE;
 923                     }
 924                     break;
 925                 case GDK_Down: // move selection down
 926                 case GDK_KP_Down:
 927                 case GDK_KP_2:
 928                     if (!MOD__CTRL) { // not ctrl
 929                         gint mul = 1 + gobble_key_events(
 930                             get_group0_keyval(&event->key), 0); // with any mask
 931                         if (MOD__ALT) { // alt
 932                             if (MOD__SHIFT) sp_selection_move_screen(desktop, 0, mul*-10); // shift
 933                             else sp_selection_move_screen(desktop, 0, mul*-1); // no shift
 934                         }
 935                         else { // no alt
 936                             if (MOD__SHIFT) sp_selection_move(desktop, 0, mul*-10*nudge); // shift
 937                             else sp_selection_move(desktop, 0, mul*-nudge); // no shift
 938                         }
 939                         ret = TRUE;
 940                     }
 941                     break;
 942                 case GDK_Escape:
 943                     if (!sp_select_context_abort(event_context))
 944                         selection->clear();
 945                     ret = TRUE;
 946                     break;
 947
 948                 case GDK_a:
 949                 case GDK_A:
 950                     if (MOD__CTRL_ONLY) {
 951                         sp_edit_select_all(desktop);
 952                         ret = TRUE;
 953                     }
 954                     break;
 955                 case GDK_space:
 956                     /* stamping mode: show outline mode moving */
 957                     /* FIXME: Is next condition ok? (lauris) */
 958                     if (sc->dragging && sc->grabbed) {
 959                         seltrans->stamp();
 960                         ret = TRUE;
 961                     }
 962                     break;
 963                 case GDK_x:
 964                 case GDK_X:
 965                     if (MOD__ALT_ONLY) {
 966                         desktop->setToolboxFocusTo ("altx");
 967                         ret = TRUE;
 968                     }
 969                     break;
 970                 case GDK_bracketleft:
 971                     if (MOD__ALT) {
 972                         gint mul = 1 + gobble_key_events(
 973                             get_group0_keyval(&event->key), 0); // with any mask
 974                         sp_selection_rotate_screen(selection, mul*1);
 975                     } else if (MOD__CTRL) {
 976                         sp_selection_rotate(selection, 90);
 977                     } else if (snaps) {
 978                         sp_selection_rotate(selection, 180/snaps);
 979                     }
 980                     ret = TRUE;
 981                     break;
 982                 case GDK_bracketright:
 983                     if (MOD__ALT) {
 984                         gint mul = 1 + gobble_key_events(
 985                             get_group0_keyval(&event->key), 0); // with any mask
 986                         sp_selection_rotate_screen(selection, -1*mul);
 987                     } else if (MOD__CTRL) {
 988                         sp_selection_rotate(selection, -90);
 989                     } else if (snaps) {
 990                         sp_selection_rotate(selection, -180/snaps);
 991                     }
 992                     ret = TRUE;
 993                     break;
 994                 case GDK_less:
 995                 case GDK_comma:
 996                     if (MOD__ALT) {
 997                         gint mul = 1 + gobble_key_events(
 998                             get_group0_keyval(&event->key), 0); // with any mask
 999                         sp_selection_scale_screen(selection, -2*mul);
1000                     } else if (MOD__CTRL) {
1001                         sp_selection_scale_times(selection, 0.5);
1002                     } else {
1003                         gint mul = 1 + gobble_key_events(
1004                             get_group0_keyval(&event->key), 0); // with any mask
1005                         sp_selection_scale(selection, -offset*mul);
1006                     }
1007                     ret = TRUE;
1008                     break;
1009                 case GDK_greater:
1010                 case GDK_period:
1011                     if (MOD__ALT) {
1012                         gint mul = 1 + gobble_key_events(
1013                             get_group0_keyval(&event->key), 0); // with any mask
1014                         sp_selection_scale_screen(selection, 2*mul);
1015                     } else if (MOD__CTRL) {
1016                         sp_selection_scale_times(selection, 2);
1017                     } else {
1018                         gint mul = 1 + gobble_key_events(
1019                             get_group0_keyval(&event->key), 0); // with any mask
1020                         sp_selection_scale(selection, offset*mul);
1021                     }
1022                     ret = TRUE;
1023                     break;
1024                 case GDK_Return:
1025                     if (MOD__CTRL_ONLY) {
1026                         if (selection->singleItem()) {
1027                             SPItem *clicked_item = selection->singleItem();
1028                             if ( SP_IS_GROUP(clicked_item) ||
1029                                  SP_IS_BOX3D(clicked_item)) { // enter group or a 3D box
1030                                 desktop->setCurrentLayer(reinterpret_cast<SPObject *>(clicked_item));
1031                                 sp_desktop_selection(desktop)->clear();
1032                             } else {
1033                                 SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selected object is not a group. Cannot enter."));
1034                             }
1035                         }
1036                         ret = TRUE;
1037                     }
1038                     break;
1039                 case GDK_BackSpace:
1040                     if (MOD__CTRL_ONLY) {
1041                         sp_select_context_up_one_layer(desktop);
1042                         ret = TRUE;
1043                     }
1044                     break;
1045                 case GDK_s:
1046                 case GDK_S:
1047                     if (MOD__SHIFT_ONLY) {
1048                         if (!selection->isEmpty()) {
1049                             seltrans->increaseState();
1050                         }
1051                         ret = TRUE;
1052                     }
1053                     break;
1054                 case GDK_g:
1055                 case GDK_G:
1056                     if (MOD__SHIFT_ONLY) {
1057                         sp_selection_to_guides(desktop);
1058                         ret = true;
1059                     }
1060                     break;
1061                 default:
1062                     break;
1063             }
1064             break;
1065                         }
1066         case GDK_KEY_RELEASE:
1067             {
1068             guint keyval = get_group0_keyval(&event->key);
1069             if (key_is_a_modifier (keyval))
1070                 event_context->defaultMessageContext()->clear();
1071
1072             bool alt = ( MOD__ALT
1073                          || (keyval == GDK_Alt_L)
1074                          || (keyval == GDK_Alt_R)
1075                          || (keyval == GDK_Meta_L)
1076                          || (keyval == GDK_Meta_R));
1077
1078             if (Inkscape::Rubberband::get(desktop)->is_started()) {
1079                 // if Alt then change cursor to moving cursor:
1080                 if (alt) {
1081                     Inkscape::Rubberband::get(desktop)->setMode(RUBBERBAND_MODE_RECT);
1082                 }
1083             } else {
1084                 if (alt) { // TODO: Should we have a variable like is_cycling or is it harmless to run this piece of code each time?
1085                     // quit cycle-selection and reset opacities
1086                     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
1087                     NRArenaItem *arenaitem;
1088                     for (GList *l = sc->cycling_items; l != NULL; l = g_list_next(l)) {
1089                         arenaitem = SP_ITEM(l->data)->get_arenaitem(desktop->dkey);
1090                         nr_arena_item_set_opacity (arenaitem, 1.0);
1091                     }
1092                     g_list_free(sc->cycling_items);
1093                     g_list_free(sc->cycling_items_selected_before);
1094                     g_list_free(sc->cycling_items_cmp);
1095                     sc->cycling_items = NULL;
1096                     sc->cycling_items_selected_before = NULL;
1097                     sc->cycling_cur_item = NULL;
1098                     sc->cycling_items_cmp = NULL;
1099                 }
1100             }
1101
1102             }
1103             // set cursor to default.
1104             if (!desktop->isWaitingCursor()) {
1105                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, event_context->cursor);
1106             }
1107             break;
1108         default:
1109             break;
1110     }
1111
1112     if (!ret) {
1113         if (((SPEventContextClass *) parent_class)->root_handler)
1114             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1115     }
1116
1117     return ret;
1118 }
1119
1120
1121 /*
1122   Local Variables:
1123   mode:c++
1124   c-file-style:"stroustrup"
1125   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1126   indent-tabs-mode:nil
1127   fill-column:99
1128   End:
1129 */
1130 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :