src/select-context.cpp

   1 #define __SP_SELECT_CONTEXT_C__
   2
   3 /*
   4  * Selection and transformation context
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9   *
  10  * Copyright (C) 1999-2005 authors
  11  *
  12  * Released under GNU GPL, read the file 'COPYING' for more information
  13  */
  14
  15 #ifdef HAVE_CONFIG_H
  16 # include "config.h"
  17 #endif
  18 #include <gdk/gdkkeysyms.h>
  19 #include "macros.h"
  20 #include "rubberband.h"
  21 #include "document.h"
  22 #include "selection.h"
  23 #include "seltrans-handles.h"
  24 #include "sp-cursor.h"
  25 //#include "pixmaps/cursor-select-m.xpm" // These aren't used
  26 //#include "pixmaps/cursor-select-d.xpm"
  27 #include "pixmaps/handles.xpm"
  28 #include <glibmm/i18n.h>
  29
  30 #include "select-context.h"
  31 #include "selection-chemistry.h"
  32 #include "desktop.h"
  33 #include "desktop-handles.h"
  34 #include "sp-root.h"
  35 #include "prefs-utils.h"
  36 #include "tools-switch.h"
  37 #include "message-stack.h"
  38 #include "selection-describer.h"
  39 #include "seltrans.h"
  40
  41 static void sp_select_context_class_init(SPSelectContextClass *klass);
  42 static void sp_select_context_init(SPSelectContext *select_context);
  43 static void sp_select_context_dispose(GObject *object);
  44
  45 static void sp_select_context_setup(SPEventContext *ec);
  46 static void sp_select_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  47 static gint sp_select_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  48 static gint sp_select_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  49
  50 static SPEventContextClass *parent_class;
  51
  52 static GdkCursor *CursorSelectMouseover = NULL;
  53 static GdkCursor *CursorSelectDragging = NULL;
  54 GdkPixbuf *handles[13];
  55
  56 static gint rb_escaped = 0; // if non-zero, rubberband was canceled by esc, so the next button release should not deselect
  57 static gint drag_escaped = 0; // if non-zero, drag was canceled by esc
  58
  59 static gint xp = 0, yp = 0; // where drag started
  60 static gint tolerance = 0;
  61 static bool within_tolerance = false;
  62
  63 GtkType
  64 sp_select_context_get_type(void)
  65 {
  66     static GType type = 0;
  67     if (!type) {
  68         GTypeInfo info = {
  69             sizeof(SPSelectContextClass),
  70             NULL, NULL,
  71             (GClassInitFunc) sp_select_context_class_init,
  72             NULL, NULL,
  73             sizeof(SPSelectContext),
  74             4,
  75             (GInstanceInitFunc) sp_select_context_init,
  76             NULL,   /* value_table */
  77         };
  78         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPSelectContext", &info, (GTypeFlags)0);
  79     }
  80     return type;
  81 }
  82
  83 static void
  84 sp_select_context_class_init(SPSelectContextClass *klass)
  85 {
  86     GObjectClass *object_class = (GObjectClass *) klass;
  87     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  88
  89     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  90
  91     object_class->dispose = sp_select_context_dispose;
  92
  93     event_context_class->setup = sp_select_context_setup;
  94     event_context_class->set = sp_select_context_set;
  95     event_context_class->root_handler = sp_select_context_root_handler;
  96     event_context_class->item_handler = sp_select_context_item_handler;
  97
  98     // cursors in select context
  99 //    CursorSelectMouseover = sp_cursor_new_from_xpm(cursor_select_m_xpm , 1, 1);
 100 //    CursorSelectDragging = sp_cursor_new_from_xpm(cursor_select_d_xpm , 1, 1);
 101     // selection handles
 102     handles[0]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_nw_xpm);
 103     handles[1]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_ne_xpm);
 104     handles[2]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_h_xpm);
 105     handles[3]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_scale_v_xpm);
 106     handles[4]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_nw_xpm);
 107     handles[5]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_n_xpm);
 108     handles[6]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_ne_xpm);
 109     handles[7]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_e_xpm);
 110     handles[8]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_se_xpm);
 111     handles[9]  = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_s_xpm);
 112     handles[10] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_sw_xpm);
 113     handles[11] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_rotate_w_xpm);
 114     handles[12] = gdk_pixbuf_new_from_xpm_data((gchar const **)handle_center_xpm);
 115
 116 }
 117
 118 static void
 119 sp_select_context_init(SPSelectContext *sc)
 120 {
 121     sc->dragging = FALSE;
 122     sc->moved = FALSE;
 123     sc->button_press_shift = false;
 124     sc->button_press_ctrl = false;
 125     sc->button_press_alt = false;
 126     sc->_seltrans = NULL;
 127     sc->_describer = NULL;
 128 }
 129
 130 static void
 131 sp_select_context_dispose(GObject *object)
 132 {
 133     SPSelectContext *sc = SP_SELECT_CONTEXT(object);
 134     SPEventContext * ec = SP_EVENT_CONTEXT (object);
 135
 136     ec->enableGrDrag(false);
 137
 138     if (sc->grabbed) {
 139         sp_canvas_item_ungrab(sc->grabbed, GDK_CURRENT_TIME);
 140         sc->grabbed = NULL;
 141     }
 142
 143     delete sc->_seltrans;
 144     sc->_seltrans = NULL;
 145     delete sc->_describer;
 146     sc->_describer = NULL;
 147
 148     if (CursorSelectDragging) {
 149         gdk_cursor_unref (CursorSelectDragging);
 150         CursorSelectDragging = NULL;
 151     }
 152     if (CursorSelectMouseover) {
 153         gdk_cursor_unref (CursorSelectMouseover);
 154         CursorSelectMouseover = NULL;
 155     }
 156
 157     G_OBJECT_CLASS(parent_class)->dispose(object);
 158 }
 159
 160 static void
 161 sp_select_context_setup(SPEventContext *ec)
 162 {
 163     SPSelectContext *select_context = SP_SELECT_CONTEXT(ec);
 164
 165     if (((SPEventContextClass *) parent_class)->setup) {
 166         ((SPEventContextClass *) parent_class)->setup(ec);
 167     }
 168
 169     SPDesktop *desktop = ec->desktop;
 170
 171     select_context->_describer = new Inkscape::SelectionDescriber(desktop->selection, desktop->messageStack());
 172
 173     select_context->_seltrans = new Inkscape::SelTrans(desktop);
 174
 175     sp_event_context_read(ec, "show");
 176     sp_event_context_read(ec, "transform");
 177
 178     if (prefs_get_int_attribute("tools.select", "gradientdrag", 0) != 0) {
 179         ec->enableGrDrag();
 180     }
 181 }
 182
 183 static void
 184 sp_select_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 185 {
 186     SPSelectContext *sc = SP_SELECT_CONTEXT(ec);
 187
 188     if (!strcmp(key, "show")) {
 189         if (val && !strcmp(val, "outline")) {
 190             sc->_seltrans->setShow(Inkscape::SelTrans::SHOW_OUTLINE);
 191         } else {
 192             sc->_seltrans->setShow(Inkscape::SelTrans::SHOW_CONTENT);
 193         }
 194     }
 195 }
 196
 197 static bool
 198 sp_select_context_abort(SPEventContext *event_context)
 199 {
 200     SPDesktop *desktop = event_context->desktop;
 201     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 202     Inkscape::SelTrans *seltrans = sc->_seltrans;
 203
 204     if (sc->dragging) {
 205         if (sc->moved) { // cancel dragging an object
 206             seltrans->ungrab();
 207             sc->moved = FALSE;
 208             sc->dragging = FALSE;
 209             drag_escaped = 1;
 210
 211             if (sc->item) {
 212                 // only undo if the item is still valid
 213                 if (SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))) {
 214                     sp_document_undo(sp_desktop_document(desktop));
 215                 }
 216
 217                 sp_object_unref( SP_OBJECT(sc->item), NULL);
 218             } else if (sc->button_press_ctrl) {
 219                 // NOTE:  This is a workaround to a bug.
 220                 // When the ctrl key is held, sc->item is not defined
 221                 // so in this case (only), we skip the object doc check
 222                 sp_document_undo(sp_desktop_document(desktop));
 223             }
 224             sc->item = NULL;
 225
 226             SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Move canceled."));
 227             return true;
 228         }
 229     } else {
 230         NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 231         if (b != NR::Nothing()) {
 232             Inkscape::Rubberband::get()->stop();
 233             rb_escaped = 1;
 234             SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selection canceled."));
 235             return true;
 236         }
 237     }
 238     return false;
 239 }
 240
 241 bool
 242 key_is_a_modifier (guint key) {
 243     return (key == GDK_Alt_L ||
 244                 key == GDK_Alt_R ||
 245                 key == GDK_Control_L ||
 246                 key == GDK_Control_R ||
 247                 key == GDK_Shift_L ||
 248                 key == GDK_Shift_R ||
 249                 key == GDK_Meta_L ||  // Meta is when you press Shift+Alt (at least on my machine)
 250             key == GDK_Meta_R);
 251 }
 252
 253 void
 254 sp_select_context_up_one_layer(SPDesktop *desktop)
 255 {
 256     /* Click in empty place, go up one level -- but don't leave a layer to root.
 257      *
 258      * (Rationale: we don't usually allow users to go to the root, since that
 259      * detracts from the layer metaphor: objects at the root level can in front
 260      * of or behind layers.  Whereas it's fine to go to the root if editing
 261      * a document that has no layers (e.g. a non-Inkscape document).)
 262      *
 263      * Once we support editing SVG "islands" (e.g. <svg> embedded in an xhtml
 264      * document), we might consider further restricting the below to disallow
 265      * leaving a layer to go to a non-layer.
 266      */
 267     SPObject *const current_layer = desktop->currentLayer();
 268     if (current_layer) {
 269         SPObject *const parent = SP_OBJECT_PARENT(current_layer);
 270         if ( parent
 271              && ( SP_OBJECT_PARENT(parent)
 272                   || !( SP_IS_GROUP(current_layer)
 273                         && ( SPGroup::LAYER
 274                              == SP_GROUP(current_layer)->layerMode() ) ) ) )
 275         {
 276             desktop->setCurrentLayer(parent);
 277             if (SP_IS_GROUP(current_layer) && SPGroup::LAYER != SP_GROUP(current_layer)->layerMode())
 278                 sp_desktop_selection(desktop)->set(current_layer);
 279         }
 280     }
 281 }
 282
 283 static gint
 284 sp_select_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 285 {
 286     gint ret = FALSE;
 287
 288     SPDesktop *desktop = event_context->desktop;
 289     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 290     Inkscape::SelTrans *seltrans = sc->_seltrans;
 291
 292     tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 293
 294     // make sure we still have valid objects to move around
 295     if (sc->item && SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))==NULL) {
 296         sp_select_context_abort(event_context);
 297     }
 298
 299     switch (event->type) {
 300         case GDK_BUTTON_PRESS:
 301             if (event->button.button == 1) {
 302                 /* Left mousebutton */
 303
 304                 // save drag origin
 305                 xp = (gint) event->button.x;
 306                 yp = (gint) event->button.y;
 307                 within_tolerance = true;
 308
 309                 // remember what modifiers were on before button press
 310                 sc->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
 311                 sc->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
 312                 sc->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
 313
 314                 if (event->button.state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK)) {
 315                     // if shift or ctrl was pressed, do not move objects;
 316                     // pass the event to root handler which will perform rubberband, shift-click, ctrl-click, ctrl-drag
 317                 } else {
 318                     sc->dragging = TRUE;
 319                     sc->moved = FALSE;
 320
 321                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 322
 323                     // remember the clicked item in sc->item:
 324                     sc->item = sp_event_context_find_item (desktop,
 325                                               NR::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, FALSE);
 326                     sp_object_ref(sc->item, NULL);
 327
 328                     rb_escaped = drag_escaped = 0;
 329
 330                     sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->drawing),
 331                                         GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
 332                                         GDK_POINTER_MOTION_MASK,
 333                                         NULL, event->button.time);
 334                     sc->grabbed = SP_CANVAS_ITEM(desktop->drawing);
 335
 336                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 337
 338                     ret = TRUE;
 339                 }
 340             } else if (event->button.button == 3) {
 341                 // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
 342                 sp_select_context_abort(event_context);
 343             }
 344             break;
 345
 346         case GDK_ENTER_NOTIFY:
 347         {
 348             GdkCursor *cursor = gdk_cursor_new(GDK_FLEUR);
 349             gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, cursor);
 350             gdk_cursor_destroy(cursor);
 351             break;
 352         }
 353
 354         case GDK_LEAVE_NOTIFY:
 355             gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, event_context->cursor);
 356             break;
 357
 358         case GDK_KEY_PRESS:
 359             if (get_group0_keyval (&event->key) == GDK_space) {
 360                 if (sc->dragging && sc->grabbed) {
 361                     /* stamping mode: show content mode moving */
 362                     seltrans->stamp();
 363                     ret = TRUE;
 364                 }
 365             }
 366             break;
 367
 368         default:
 369             break;
 370     }
 371
 372     if (!ret) {
 373         if (((SPEventContextClass *) parent_class)->item_handler)
 374             ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 375     }
 376
 377     return ret;
 378 }
 379
 380 static gint
 381 sp_select_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 382 {
 383     SPItem *item = NULL;
 384     SPItem *item_at_point = NULL, *group_at_point = NULL, *item_in_group = NULL;
 385     gint ret = FALSE;
 386
 387     SPDesktop *desktop = event_context->desktop;
 388     SPSelectContext *sc = SP_SELECT_CONTEXT(event_context);
 389     Inkscape::SelTrans *seltrans = sc->_seltrans;
 390     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 391     gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 392     gdouble const offset = prefs_get_double_attribute_limited("options.defaultscale", "value", 2, 0, 1000);
 393     tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 394     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 395
 396     // make sure we still have valid objects to move around
 397     if (sc->item && SP_OBJECT_DOCUMENT( SP_OBJECT(sc->item))==NULL) {
 398         sp_select_context_abort(event_context);
 399     }
 400
 401     switch (event->type) {
 402         case GDK_2BUTTON_PRESS:
 403             if (event->button.button == 1) {
 404                 if (!selection->isEmpty()) {
 405                     SPItem *clicked_item = (SPItem *) selection->itemList()->data;
 406                     if (SP_IS_GROUP (clicked_item)) { // enter group
 407                         desktop->setCurrentLayer(reinterpret_cast<SPObject *>(clicked_item));
 408                         sp_desktop_selection(desktop)->clear();
 409                         sc->dragging = false;
 410
 411                         sp_canvas_end_forced_full_redraws(desktop->canvas);
 412                     } else { // switch tool
 413                         tools_switch_by_item (desktop, clicked_item);
 414                     }
 415                 } else {
 416                     sp_select_context_up_one_layer(desktop);
 417                 }
 418                 ret = TRUE;
 419             }
 420             break;
 421         case GDK_BUTTON_PRESS:
 422             if (event->button.button == 1) {
 423
 424                 // save drag origin
 425                 xp = (gint) event->button.x;
 426                 yp = (gint) event->button.y;
 427                 within_tolerance = true;
 428
 429                 NR::Point const button_pt(event->button.x, event->button.y);
 430                 NR::Point const p(desktop->w2d(button_pt));
 431                 Inkscape::Rubberband::get()->start(desktop, p);
 432                 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 433                                     GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK,
 434                                     NULL, event->button.time);
 435                 sc->grabbed = SP_CANVAS_ITEM(desktop->acetate);
 436
 437                 // remember what modifiers were on before button press
 438                 sc->button_press_shift = (event->button.state & GDK_SHIFT_MASK) ? true : false;
 439                 sc->button_press_ctrl = (event->button.state & GDK_CONTROL_MASK) ? true : false;
 440                 sc->button_press_alt = (event->button.state & GDK_MOD1_MASK) ? true : false;
 441
 442                 sc->moved = FALSE;
 443
 444                 rb_escaped = drag_escaped = 0;
 445
 446                 ret = TRUE;
 447             } else if (event->button.button == 3) {
 448                 // right click; do not eat it so that right-click menu can appear, but cancel dragging & rubberband
 449                 sp_select_context_abort(event_context);
 450             }
 451             break;
 452
 453         case GDK_MOTION_NOTIFY:
 454             if (event->motion.state & GDK_BUTTON1_MASK) {
 455                 NR::Point const motion_pt(event->motion.x, event->motion.y);
 456                 NR::Point const p(desktop->w2d(motion_pt));
 457
 458                 if ( within_tolerance
 459                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
 460                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
 461                     break; // do not drag if we're within tolerance from origin
 462                 }
 463                 // Once the user has moved farther than tolerance from the original location
 464                 // (indicating they intend to move the object, not click), then always process the
 465                 // motion notify coordinates as given (no snapping back to origin)
 466                 within_tolerance = false;
 467
 468                 if (sc->button_press_ctrl || sc->button_press_alt) {
 469                     // if ctrl or alt was pressed and it's not click, we want to drag rather than rubberband
 470                     sc->dragging = TRUE;
 471
 472                     sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 473                 }
 474
 475                 if (sc->dragging) {
 476                     /* User has dragged fast, so we get events on root (lauris)*/
 477                     // not only that; we will end up here when ctrl-dragging as well
 478                     // and also when we started within tolerance, but trespassed tolerance outside of item
 479                     Inkscape::Rubberband::get()->stop();
 480                     item_at_point = desktop->item_at_point(NR::Point(event->button.x, event->button.y), FALSE);
 481                     if (!item_at_point) // if no item at this point, try at the click point (bug 1012200)
 482                         item_at_point = desktop->item_at_point(NR::Point(xp, yp), FALSE);
 483                     if (item_at_point || sc->moved || sc->button_press_alt) {
 484                         // drag only if starting from an item, or if something is already grabbed, or if alt-dragging
 485                         if (!sc->moved) {
 486                             item_in_group = desktop->item_at_point(NR::Point(event->button.x, event->button.y), TRUE);
 487                             group_at_point = desktop->group_at_point(NR::Point(event->button.x, event->button.y));
 488                             // if neither a group nor an item (possibly in a group) at point are selected, set selection to the item at point
 489                             if ((!item_in_group || !selection->includes(item_in_group)) &&
 490                                 (!group_at_point || !selection->includes(group_at_point))
 491                                 && !sc->button_press_alt) {
 492                                 // select what is under cursor
 493                                 if (!seltrans->isEmpty()) {
 494                                     seltrans->resetState();
 495                                 }
 496                                 // when simply ctrl-dragging, we don't want to go into groups
 497                                 if (item_at_point && !selection->includes(item_at_point))
 498                                     selection->set(item_at_point);
 499                             } // otherwise, do not change selection so that dragging selected-within-group items, as well as alt-dragging, is possible
 500                             seltrans->grab(p, -1, -1, FALSE);
 501                             sc->moved = TRUE;
 502                         }
 503                         if (!seltrans->isEmpty())
 504                             seltrans->moveTo(p, event->button.state);
 505                         if (desktop->scroll_to_point(&p))
 506                             // unfortunately in complex drawings, gobbling results in losing grab of the object, for some mysterious reason
 507                             ; //gobble_motion_events(GDK_BUTTON1_MASK);
 508                         ret = TRUE;
 509                     } else {
 510                         sc->dragging = FALSE;
 511
 512                         sp_canvas_end_forced_full_redraws(desktop->canvas);
 513                     }
 514                 } else {
 515                     Inkscape::Rubberband::get()->move(p);
 516                     gobble_motion_events(GDK_BUTTON1_MASK);
 517                 }
 518             }
 519             break;
 520         case GDK_BUTTON_RELEASE:
 521             xp = yp = 0;
 522             if ((event->button.button == 1) && (sc->grabbed)) {
 523                 if (sc->dragging) {
 524                     if (sc->moved) {
 525                         // item has been moved
 526                         seltrans->ungrab();
 527                         sc->moved = FALSE;
 528                     } else if (sc->item && !drag_escaped) {
 529                         // item has not been moved -> simply a click, do selecting
 530                         if (!selection->isEmpty()) {
 531                             if (event->button.state & GDK_SHIFT_MASK) {
 532                                 // with shift, toggle selection
 533                                 seltrans->resetState();
 534                                 selection->toggle(sc->item);
 535                             } else {
 536                                 // without shift, increase state (i.e. toggle scale/rotation handles)
 537                                 if (selection->includes(sc->item)) {
 538                                     seltrans->increaseState();
 539                                 } else {
 540                                     seltrans->resetState();
 541                                     selection->set(sc->item);
 542                                 }
 543                             }
 544                         } else { // simple or shift click, no previous selection
 545                             seltrans->resetState();
 546                             selection->set(sc->item);
 547                         }
 548                     }
 549                     sc->dragging = FALSE;
 550
 551                     sp_canvas_end_forced_full_redraws(desktop->canvas);
 552
 553                     if (sc->item) {
 554                         sp_object_unref( SP_OBJECT(sc->item), NULL);
 555                     }
 556                     sc->item = NULL;
 557                 } else {
 558                     NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 559                     if (b != NR::Nothing() && !within_tolerance) {
 560                         // this was a rubberband drag
 561                         Inkscape::Rubberband::get()->stop();
 562                         seltrans->resetState();
 563                         // find out affected items:
 564                         GSList *items = sp_document_items_in_box(sp_desktop_document(desktop), desktop->dkey, b.assume());
 565                         if (event->button.state & GDK_SHIFT_MASK) {
 566                             // with shift, add to selection
 567                             selection->addList (items);
 568                         } else {
 569                             // without shift, simply select anew
 570                             selection->setList (items);
 571                         }
 572                         g_slist_free (items);
 573                     } else { // it was just a click, or a too small rubberband
 574                         Inkscape::Rubberband::get()->stop();
 575                         if (sc->button_press_shift && !rb_escaped && !drag_escaped) {
 576                             // this was a shift-click, select what was clicked upon
 577
 578                             sc->button_press_shift = false;
 579
 580                             if (sc->button_press_ctrl) {
 581                                 // go into groups, honoring Alt
 582                                 item = sp_event_context_find_item (desktop,
 583                                                    NR::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, TRUE);
 584                                 sc->button_press_ctrl = FALSE;
 585                             } else {
 586                                 // don't go into groups, honoring Alt
 587                                 item = sp_event_context_find_item (desktop,
 588                                                    NR::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, FALSE);
 589                             }
 590
 591                             if (item) {
 592                                 selection->toggle(item);
 593                                 item = NULL;
 594                             }
 595
 596                         } else if (sc->button_press_ctrl && !rb_escaped && !drag_escaped) { // ctrl-click
 597
 598                             sc->button_press_ctrl = FALSE;
 599
 600                             item = sp_event_context_find_item (desktop,
 601                                          NR::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, TRUE);
 602
 603                             if (item) {
 604                                 if (selection->includes(item)) {
 605                                     seltrans->increaseState();
 606                                 } else {
 607                                     seltrans->resetState();
 608                                     selection->set(item);
 609                                 }
 610                                 item = NULL;
 611                             }
 612
 613                         } else { // click without shift, simply deselect, unless with Alt or something was cancelled
 614                             if (!selection->isEmpty()) {
 615                                 if (!(rb_escaped) && !(drag_escaped) && !(event->button.state & GDK_MOD1_MASK))
 616                                     selection->clear();
 617                                 rb_escaped = 0;
 618                                 ret = TRUE;
 619                             }
 620                         }
 621                     }
 622                     ret = TRUE;
 623                 }
 624                 if (sc->grabbed) {
 625                     sp_canvas_item_ungrab(sc->grabbed, event->button.time);
 626                     sc->grabbed = NULL;
 627                 }
 628
 629                 desktop->updateNow();
 630             }
 631             sc->button_press_shift = false;
 632             sc->button_press_ctrl = false;
 633             sc->button_press_alt = false;
 634             break;
 635
 636         case GDK_KEY_PRESS: // keybindings for select context
 637
 638             if (!key_is_a_modifier (get_group0_keyval (&event->key))) {
 639                     event_context->defaultMessageContext()->clear();
 640             } else if (sc->grabbed || seltrans->isGrabbed()) {
 641                 // do not change the statusbar text when mousekey is down to move or transform the object,
 642                 // because the statusbar text is already updated somewhere else.
 643                    break;
 644             } else {
 645                     sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 646                                                 _("<b>Ctrl</b>: select in groups, move hor/vert"),
 647                                                 _("<b>Shift</b>: toggle select, force rubberband, disable snapping"),
 648                                                 _("<b>Alt</b>: select under, move selected"));
 649                     // if Alt then change cursor to moving cursor:
 650                     guint keyval = get_group0_keyval(&event->key);
 651                     bool alt = ( MOD__ALT
 652                                     || (keyval == GDK_Alt_L)
 653                                     || (keyval == GDK_Alt_R)
 654                                     || (keyval == GDK_Meta_L)
 655                                     || (keyval == GDK_Meta_R));
 656                     if (alt) {
 657                         GdkCursor *cursor = gdk_cursor_new(GDK_FLEUR);
 658                         gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, cursor);
 659                         gdk_cursor_destroy(cursor);
 660                     }
 661                     //*/
 662                     break;
 663             }
 664
 665             switch (get_group0_keyval (&event->key)) {
 666                 case GDK_Left: // move selection left
 667                 case GDK_KP_Left:
 668                 case GDK_KP_4:
 669                     if (!MOD__CTRL) { // not ctrl
 670                         if (MOD__ALT) { // alt
 671                             if (MOD__SHIFT) sp_selection_move_screen(-10, 0); // shift
 672                             else sp_selection_move_screen(-1, 0); // no shift
 673                         }
 674                         else { // no alt
 675                             if (MOD__SHIFT) sp_selection_move(-10*nudge, 0); // shift
 676                             else sp_selection_move(-nudge, 0); // no shift
 677                         }
 678                         ret = TRUE;
 679                     }
 680                     break;
 681                 case GDK_Up: // move selection up
 682                 case GDK_KP_Up:
 683                 case GDK_KP_8:
 684                     if (!MOD__CTRL) { // not ctrl
 685                         if (MOD__ALT) { // alt
 686                             if (MOD__SHIFT) sp_selection_move_screen(0, 10); // shift
 687                             else sp_selection_move_screen(0, 1); // no shift
 688                         }
 689                         else { // no alt
 690                             if (MOD__SHIFT) sp_selection_move(0, 10*nudge); // shift
 691                             else sp_selection_move(0, nudge); // no shift
 692                         }
 693                         ret = TRUE;
 694                     }
 695                     break;
 696                 case GDK_Right: // move selection right
 697                 case GDK_KP_Right:
 698                 case GDK_KP_6:
 699                     if (!MOD__CTRL) { // not ctrl
 700                         if (MOD__ALT) { // alt
 701                             if (MOD__SHIFT) sp_selection_move_screen(10, 0); // shift
 702                             else sp_selection_move_screen(1, 0); // no shift
 703                         }
 704                         else { // no alt
 705                             if (MOD__SHIFT) sp_selection_move(10*nudge, 0); // shift
 706                             else sp_selection_move(nudge, 0); // no shift
 707                         }
 708                         ret = TRUE;
 709                     }
 710                     break;
 711                 case GDK_Down: // move selection down
 712                 case GDK_KP_Down:
 713                 case GDK_KP_2:
 714                     if (!MOD__CTRL) { // not ctrl
 715                         if (MOD__ALT) { // alt
 716                             if (MOD__SHIFT) sp_selection_move_screen(0, -10); // shift
 717                             else sp_selection_move_screen(0, -1); // no shift
 718                         }
 719                         else { // no alt
 720                             if (MOD__SHIFT) sp_selection_move(0, -10*nudge); // shift
 721                             else sp_selection_move(0, -nudge); // no shift
 722                         }
 723                         ret = TRUE;
 724                     }
 725                     break;
 726                 case GDK_Escape:
 727                     if (!sp_select_context_abort(event_context))
 728                         selection->clear();
 729                     ret = TRUE;
 730                     break;
 731                 case GDK_a:
 732                 case GDK_A:
 733                     if (MOD__CTRL_ONLY) {
 734                         sp_edit_select_all();
 735                         ret = TRUE;
 736                     }
 737                     break;
 738                 case GDK_Tab: // Tab - cycle selection forward
 739                     if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
 740                         sp_selection_item_next();
 741                         ret = TRUE;
 742                     }
 743                     break;
 744                 case GDK_ISO_Left_Tab: // Shift Tab - cycle selection backward
 745                     if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
 746                         sp_selection_item_prev();
 747                         ret = TRUE;
 748                     }
 749                     break;
 750                 case GDK_space:
 751                     /* stamping mode: show outline mode moving */
 752                     /* FIXME: Is next condition ok? (lauris) */
 753                     if (sc->dragging && sc->grabbed) {
 754                         seltrans->stamp();
 755                         ret = TRUE;
 756                     }
 757                     break;
 758                 case GDK_x:
 759                 case GDK_X:
 760                     if (MOD__ALT_ONLY) {
 761                         desktop->setToolboxFocusTo ("altx");
 762                         ret = TRUE;
 763                     }
 764                     break;
 765                 case GDK_bracketleft:
 766                     if (MOD__ALT) {
 767                         sp_selection_rotate_screen(selection, 1);
 768                     } else if (MOD__CTRL) {
 769                         sp_selection_rotate(selection, 90);
 770                     } else if (snaps) {
 771                         sp_selection_rotate(selection, 180/snaps);
 772                     }
 773                     ret = TRUE;
 774                     break;
 775                 case GDK_bracketright:
 776                     if (MOD__ALT) {
 777                         sp_selection_rotate_screen(selection, -1);
 778                     } else if (MOD__CTRL) {
 779                         sp_selection_rotate(selection, -90);
 780                     } else if (snaps) {
 781                         sp_selection_rotate(selection, -180/snaps);
 782                     }
 783                     ret = TRUE;
 784                     break;
 785                 case GDK_less:
 786                 case GDK_comma:
 787                     if (MOD__ALT) {
 788                         sp_selection_scale_screen(selection, -2);
 789                     } else if (MOD__CTRL) {
 790                         sp_selection_scale_times(selection, 0.5);
 791                     } else {
 792                         sp_selection_scale(selection, -offset);
 793                     }
 794                     ret = TRUE;
 795                     break;
 796                 case GDK_greater:
 797                 case GDK_period:
 798                     if (MOD__ALT) {
 799                         sp_selection_scale_screen(selection, 2);
 800                     } else if (MOD__CTRL) {
 801                         sp_selection_scale_times(selection, 2);
 802                     } else {
 803                         sp_selection_scale(selection, offset);
 804                     }
 805                     ret = TRUE;
 806                     break;
 807                 case GDK_Return:
 808                     if (MOD__CTRL_ONLY) {
 809                         if (selection->singleItem()) {
 810                             SPItem *clicked_item = selection->singleItem();
 811                             if (SP_IS_GROUP (clicked_item)) { // enter group
 812                                 desktop->setCurrentLayer(reinterpret_cast<SPObject *>(clicked_item));
 813                                 sp_desktop_selection(desktop)->clear();
 814                             } else {
 815                                 SP_EVENT_CONTEXT(sc)->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Selected object is not a group. Cannot enter."));
 816                             }
 817                         }
 818                         ret = TRUE;
 819                     }
 820                     break;
 821                 case GDK_BackSpace:
 822                     if (MOD__CTRL_ONLY) {
 823                         sp_select_context_up_one_layer(desktop);
 824                         ret = TRUE;
 825                     }
 826                     break;
 827                 default:
 828                     break;
 829             }
 830             break;
 831         case GDK_KEY_RELEASE:
 832             if (key_is_a_modifier (get_group0_keyval (&event->key)))
 833                 event_context->defaultMessageContext()->clear();
 834                 // set cursor to default.
 835                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, event_context->cursor);
 836             break;
 837         default:
 838             break;
 839     }
 840
 841     if (!ret) {
 842         if (((SPEventContextClass *) parent_class)->root_handler)
 843             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 844     }
 845
 846     return ret;
 847 }
 848
 849
 850 /*
 851   Local Variables:
 852   mode:c++
 853   c-file-style:"stroustrup"
 854   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 855   indent-tabs-mode:nil
 856   fill-column:99
 857   End:
 858 */
 859 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :