src/select-context.cpp

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