src/box3d-context.cpp

   1 #define __SP_3DBOX_CONTEXT_C__
   2
   3 /*
   4  * 3D box drawing context
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2007      Maximilian Albert <Anhalter42@gmx.de>
  11  * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  12  * Copyright (C) 2000-2005 authors
  13  * Copyright (C) 2000-2001 Ximian, Inc.
  14  *
  15  * Released under GNU GPL, read the file 'COPYING' for more information
  16  */
  17
  18 #include "config.h"
  19
  20 #include <gdk/gdkkeysyms.h>
  21
  22 #include "macros.h"
  23 #include "display/sp-canvas.h"
  24 #include "document.h"
  25 #include "sp-namedview.h"
  26 #include "selection.h"
  27 #include "desktop-handles.h"
  28 #include "snap.h"
  29 #include "display/curve.h"
  30 #include "desktop.h"
  31 #include "message-context.h"
  32 #include "pixmaps/cursor-3dbox.xpm"
  33 #include "box3d.h"
  34 #include "box3d-context.h"
  35 #include "sp-metrics.h"
  36 #include <glibmm/i18n.h>
  37 #include "object-edit.h"
  38 #include "xml/repr.h"
  39 #include "xml/node-event-vector.h"
  40 #include "prefs-utils.h"
  41 #include "context-fns.h"
  42
  43 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass);
  44 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context);
  45 static void sp_3dbox_context_dispose(GObject *object);
  46
  47 static void sp_3dbox_context_setup(SPEventContext *ec);
  48 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  49
  50 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  51 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  52
  53 static void sp_3dbox_drag(SP3DBoxContext &bc, guint state);
  54 static void sp_3dbox_finish(SP3DBoxContext *bc);
  55
  56 static SPEventContextClass *parent_class;
  57
  58
  59 GtkType sp_3dbox_context_get_type()
  60 {
  61     static GType type = 0;
  62     if (!type) {
  63         GTypeInfo info = {
  64             sizeof(SP3DBoxContextClass),
  65             NULL, NULL,
  66             (GClassInitFunc) sp_3dbox_context_class_init,
  67             NULL, NULL,
  68             sizeof(SP3DBoxContext),
  69             4,
  70             (GInstanceInitFunc) sp_3dbox_context_init,
  71             NULL,    /* value_table */
  72         };
  73         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SP3DBoxContext", &info, (GTypeFlags) 0);
  74     }
  75     return type;
  76 }
  77
  78 static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass)
  79 {
  80     GObjectClass *object_class = (GObjectClass *) klass;
  81     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  82
  83     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
  84
  85     object_class->dispose = sp_3dbox_context_dispose;
  86
  87     event_context_class->setup = sp_3dbox_context_setup;
  88     event_context_class->set = sp_3dbox_context_set;
  89     event_context_class->root_handler  = sp_3dbox_context_root_handler;
  90     event_context_class->item_handler  = sp_3dbox_context_item_handler;
  91 }
  92
  93 static void sp_3dbox_context_init(SP3DBoxContext *box3d_context)
  94 {
  95     SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
  96
  97     event_context->cursor_shape = cursor_3dbox_xpm;
  98     event_context->hot_x = 4;
  99     event_context->hot_y = 4;
 100     event_context->xp = 0;
 101     event_context->yp = 0;
 102     event_context->tolerance = 0;
 103     event_context->within_tolerance = false;
 104     event_context->item_to_select = NULL;
 105
 106     event_context->shape_repr = NULL;
 107     event_context->shape_knot_holder = NULL;
 108
 109     box3d_context->item = NULL;
 110
 111     box3d_context->ctrl_dragged = false;
 112     box3d_context->extruded = false;
 113
 114     box3d_context->_vpdrag = NULL;
 115
 116     new (&box3d_context->sel_changed_connection) sigc::connection();
 117 }
 118
 119 static void sp_3dbox_context_dispose(GObject *object)
 120 {
 121     SP3DBoxContext *bc = SP_3DBOX_CONTEXT(object);
 122     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 123
 124     ec->enableGrDrag(false);
 125
 126     delete (bc->_vpdrag);
 127     bc->_vpdrag = NULL;
 128
 129     bc->sel_changed_connection.disconnect();
 130     bc->sel_changed_connection.~connection();
 131
 132     /* fixme: This is necessary because we do not grab */
 133     if (bc->item) {
 134         sp_3dbox_finish(bc);
 135     }
 136
 137     if (ec->shape_knot_holder) {
 138         sp_knot_holder_destroy(ec->shape_knot_holder);
 139         ec->shape_knot_holder = NULL;
 140     }
 141
 142     if (ec->shape_repr) { // remove old listener
 143         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 144         Inkscape::GC::release(ec->shape_repr);
 145         ec->shape_repr = 0;
 146     }
 147
 148     if (bc->_message_context) {
 149         delete bc->_message_context;
 150     }
 151
 152     G_OBJECT_CLASS(parent_class)->dispose(object);
 153 }
 154
 155 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 156     NULL, /* child_added */
 157     NULL, /* child_removed */
 158     ec_shape_event_attr_changed,
 159     NULL, /* content_changed */
 160     NULL  /* order_changed */
 161 };
 162
 163 /**
 164 \brief  Callback that processes the "changed" signal on the selection;
 165 destroys old and creates new knotholder
 166 */
 167 void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 168 {
 169     SP3DBoxContext *bc = SP_3DBOX_CONTEXT(data);
 170     SPEventContext *ec = SP_EVENT_CONTEXT(bc);
 171
 172     if (ec->shape_knot_holder) { // destroy knotholder
 173         sp_knot_holder_destroy(ec->shape_knot_holder);
 174         ec->shape_knot_holder = NULL;
 175     }
 176
 177     if (ec->shape_repr) { // remove old listener
 178         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 179         Inkscape::GC::release(ec->shape_repr);
 180         ec->shape_repr = 0;
 181     }
 182
 183     SPItem *item = selection->singleItem();
 184     if (item) {
 185         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 186         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 187         if (shape_repr) {
 188             ec->shape_repr = shape_repr;
 189             Inkscape::GC::anchor(shape_repr);
 190             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 191         }
 192         if (SP_IS_3DBOX (item)) {
 193             bc->_vpdrag->document->current_perspective = bc->_vpdrag->document->get_persp_of_box (SP_3DBOX (item));
 194         }
 195     } else {
 196         /* If several boxes sharing the same perspective are selected,
 197            we can still set the current selection accordingly */
 198         std::set<Box3D::Perspective3D *> perspectives;
 199         for (GSList *i = (GSList *) selection->itemList(); i != NULL; i = i->next) {
 200             if (SP_IS_3DBOX (i->data)) {
 201                 perspectives.insert (bc->_vpdrag->document->get_persp_of_box (SP_3DBOX (i->data)));
 202             }
 203         }
 204         if (perspectives.size() == 1) {
 205             bc->_vpdrag->document->current_perspective = *(perspectives.begin());
 206         }
 207         // TODO: What to do if several boxes with different perspectives are selected?
 208     }
 209 }
 210
 211 static void sp_3dbox_context_setup(SPEventContext *ec)
 212 {
 213     SP3DBoxContext *bc = SP_3DBOX_CONTEXT(ec);
 214
 215     if (((SPEventContextClass *) parent_class)->setup) {
 216         ((SPEventContextClass *) parent_class)->setup(ec);
 217     }
 218
 219     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 220     if (item) {
 221         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 222         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 223         if (shape_repr) {
 224             ec->shape_repr = shape_repr;
 225             Inkscape::GC::anchor(shape_repr);
 226             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 227         }
 228     }
 229
 230     bc->sel_changed_connection.disconnect();
 231     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 232         sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)bc)
 233     );
 234
 235     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 236
 237     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 238         ec->enableSelectionCue();
 239     }
 240
 241     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 242         ec->enableGrDrag();
 243     }
 244
 245     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 246 }
 247
 248 static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 249 {
 250     //SP3DBoxContext *bc = SP_3DBOX_CONTEXT(ec);
 251
 252     /* fixme: Proper error handling for non-numeric data.  Use a locale-independent function like
 253      * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
 254     /**
 255     if ( strcmp(key, "rx") == 0 ) {
 256         bc->rx = ( val
 257                          ? g_ascii_strtod (val, NULL)
 258                          : 0.0 );
 259     } else if ( strcmp(key, "ry") == 0 ) {
 260         bc->ry = ( val
 261                          ? g_ascii_strtod (val, NULL)
 262                          : 0.0 );
 263     }
 264     **/
 265 }
 266
 267 static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 268 {
 269     SPDesktop *desktop = event_context->desktop;
 270
 271     gint ret = FALSE;
 272
 273     switch (event->type) {
 274     case GDK_BUTTON_PRESS:
 275         if ( event->button.button == 1 && !event_context->space_panning) {
 276             Inkscape::setup_for_drag_start(desktop, event_context, event);
 277             ret = TRUE;
 278         }
 279         break;
 280         // motion and release are always on root (why?)
 281     default:
 282         break;
 283     }
 284
 285     if (((SPEventContextClass *) parent_class)->item_handler) {
 286         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 287     }
 288
 289     return ret;
 290 }
 291
 292 static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 293 {
 294     static bool dragging;
 295
 296     SPDesktop *desktop = event_context->desktop;
 297     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 298     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 299
 300     SP3DBoxContext *bc = SP_3DBOX_CONTEXT(event_context);
 301
 302     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 303
 304     gint ret = FALSE;
 305     switch (event->type) {
 306     case GDK_BUTTON_PRESS:
 307         if ( event->button.button == 1  && !event_context->space_panning) {
 308             NR::Point const button_w(event->button.x,
 309                                      event->button.y);
 310
 311             // save drag origin
 312             event_context->xp = (gint) button_w[NR::X];
 313             event_context->yp = (gint) button_w[NR::Y];
 314             event_context->within_tolerance = true;
 315
 316             // remember clicked item, disregarding groups, honoring Alt
 317             event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, event->button.state & GDK_CONTROL_MASK);
 318
 319             dragging = true;
 320
 321             /* Position center */
 322             NR::Point const button_dt(desktop->w2d(button_w));
 323             bc->drag_origin = button_dt;
 324             bc->drag_ptB = button_dt;
 325             bc->drag_ptC = button_dt;
 326
 327             /* Snap center */
 328             SnapManager const &m = desktop->namedview->snap_manager;
 329             bc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE,
 330                                     button_dt, bc->item).getPoint();
 331
 332             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 333                                 ( GDK_KEY_PRESS_MASK |
 334                                   GDK_BUTTON_RELEASE_MASK       |
 335                                   GDK_POINTER_MOTION_MASK       |
 336                                   GDK_BUTTON_PRESS_MASK ),
 337                                 NULL, event->button.time);
 338             ret = TRUE;
 339         }
 340         break;
 341     case GDK_MOTION_NOTIFY:
 342         if ( dragging
 343              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 344         {
 345             if ( event_context->within_tolerance
 346                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 347                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 348                 break; // do not drag if we're within tolerance from origin
 349             }
 350             // Once the user has moved farther than tolerance from the original location
 351             // (indicating they intend to draw, not click), then always process the
 352             // motion notify coordinates as given (no snapping back to origin)
 353             event_context->within_tolerance = false;
 354
 355             NR::Point const motion_w(event->motion.x,
 356                                      event->motion.y);
 357             NR::Point motion_dt(desktop->w2d(motion_w));
 358
 359             SnapManager const &m = desktop->namedview->snap_manager;
 360             motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, bc->item).getPoint();
 361
 362             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 363
 364             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 365                 /* once shift is pressed, set bc->extruded (no need to create further faces;
 366                    all of them are already created in sp_3dbox_init); since we made the rear face
 367                    invisible in the beginning to avoid "flashing", we must set its correct style now */
 368                 bc->extruded = true;
 369                 SP_3DBOX (bc->item)->faces[5]->set_style (NULL, true);
 370             }
 371
 372             if (!bc->extruded) {
 373                 bc->drag_ptB = motion_dt;
 374                 bc->drag_ptC = motion_dt;
 375             } else {
 376                 // Without Ctrl, motion of the extruded corner is constrained to the
 377                 // perspective line from drag_ptB to vanishing point Y.
 378                 if (!bc->ctrl_dragged) {
 379                         bc->drag_ptC = Box3D::perspective_line_snap (bc->drag_ptB, Box3D::Z, motion_dt, bc->_vpdrag->document->current_perspective);
 380                 } else {
 381                     bc->drag_ptC = motion_dt;
 382                 }
 383                 bc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, bc->drag_ptC, bc->item).getPoint();
 384                 if (bc->ctrl_dragged) {
 385                         Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y, bc->_vpdrag->document->current_perspective);
 386                         Box3D::PerspectiveLine pl2 (bc->drag_ptB, Box3D::X, bc->_vpdrag->document->current_perspective);
 387                         NR::Point corner1 = pl1.meet(pl2);
 388
 389                         Box3D::PerspectiveLine pl3 (corner1, Box3D::X, bc->_vpdrag->document->current_perspective);
 390                         Box3D::PerspectiveLine pl4 (bc->drag_ptC, Box3D::Z, bc->_vpdrag->document->current_perspective);
 391                         bc->drag_ptB = pl3.meet(pl4);
 392                 }
 393             }
 394
 395
 396             sp_3dbox_drag(*bc, event->motion.state);
 397
 398             ret = TRUE;
 399         }
 400         break;
 401     case GDK_BUTTON_RELEASE:
 402         event_context->xp = event_context->yp = 0;
 403         if ( event->button.button == 1  && !event_context->space_panning) {
 404             dragging = false;
 405
 406             if (!event_context->within_tolerance) {
 407                 // we've been dragging, finish the box
 408                 sp_3dbox_finish(bc);
 409             } else if (event_context->item_to_select) {
 410                 // no dragging, select clicked item if any
 411                 if (event->button.state & GDK_SHIFT_MASK) {
 412                     selection->toggle(event_context->item_to_select);
 413                 } else {
 414                     selection->set(event_context->item_to_select);
 415                 }
 416             } else {
 417                 // click in an empty space
 418                 selection->clear();
 419             }
 420
 421             event_context->item_to_select = NULL;
 422             ret = TRUE;
 423             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 424                                   event->button.time);
 425         }
 426         break;
 427     case GDK_KEY_PRESS:
 428         switch (get_group0_keyval (&event->key)) {
 429         case GDK_Alt_L:
 430         case GDK_Alt_R:
 431         case GDK_Control_L:
 432         case GDK_Control_R:
 433         case GDK_Shift_L:
 434         case GDK_Shift_R:
 435         case GDK_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
 436         case GDK_Meta_R:
 437             /***
 438             if (!dragging){
 439                 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 440                                             _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
 441                                             _("<b>Shift</b>: draw around the starting point"),
 442                                             NULL);
 443             }
 444             ***/
 445             break;
 446         case GDK_Up:
 447         case GDK_Down:
 448         case GDK_KP_Up:
 449         case GDK_KP_Down:
 450             // prevent the zoom field from activation
 451             if (!MOD__CTRL_ONLY)
 452                 ret = TRUE;
 453             break;
 454
 455         case GDK_bracketright:
 456             inkscape_active_document()->current_perspective->rotate (Box3D::X, -180/snaps, MOD__ALT);
 457             ret = true;
 458             break;
 459
 460         case GDK_bracketleft:
 461             inkscape_active_document()->current_perspective->rotate (Box3D::X, 180/snaps, MOD__ALT);
 462             ret = true;
 463             break;
 464
 465         case GDK_parenright:
 466             inkscape_active_document()->current_perspective->rotate (Box3D::Y, -180/snaps, MOD__ALT);
 467             ret = true;
 468             break;
 469
 470         case GDK_parenleft:
 471             inkscape_active_document()->current_perspective->rotate (Box3D::Y, 180/snaps, MOD__ALT);
 472             ret = true;
 473             break;
 474
 475         case GDK_braceright:
 476             inkscape_active_document()->current_perspective->rotate (Box3D::Z, -180/snaps, MOD__ALT);
 477             ret = true;
 478             break;
 479
 480         case GDK_braceleft:
 481             inkscape_active_document()->current_perspective->rotate (Box3D::Z, 180/snaps, MOD__ALT);
 482             ret = true;
 483             break;
 484
 485         case GDK_I:
 486             Box3D::Perspective3D::print_debugging_info();
 487             ret = true;
 488             break;
 489
 490         case GDK_L:
 491             if (MOD__CTRL) break; // Don't catch Shift+Ctrl+L (Layers dialog)
 492             bc->_vpdrag->show_lines = !bc->_vpdrag->show_lines;
 493             bc->_vpdrag->updateLines();
 494             ret = true;
 495             break;
 496
 497         case GDK_A:
 498             if (MOD__CTRL) break; // Don't catch Ctrl+A ("select all")
 499             if (bc->_vpdrag->show_lines) {
 500                 bc->_vpdrag->front_or_rear_lines = bc->_vpdrag->front_or_rear_lines ^ 0x2; // toggle rear PLs
 501             }
 502             bc->_vpdrag->updateLines();
 503             ret = true;
 504             break;
 505
 506         case GDK_X:
 507         {
 508             if (MOD__CTRL) break; // Don't catch Ctrl+X ('cut') and Ctrl+Shift+X ('open XML editor')
 509             Inkscape::Selection *selection = sp_desktop_selection (inkscape_active_desktop());
 510             for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
 511                 if (!SP_IS_3DBOX (i->data)) continue;
 512                 sp_3dbox_switch_front_face (SP_3DBOX (i->data), Box3D::X);
 513              }
 514             bc->_vpdrag->updateLines();
 515             ret = true;
 516             break;
 517         }
 518
 519         case GDK_Y:
 520         {
 521             if (MOD__CTRL) break; // Don't catch Ctrl+Y ("redo")
 522             Inkscape::Selection *selection = sp_desktop_selection (inkscape_active_desktop());
 523             for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
 524                 if (!SP_IS_3DBOX (i->data)) continue;
 525                 sp_3dbox_switch_front_face (SP_3DBOX (i->data), Box3D::Y);
 526             }
 527             bc->_vpdrag->updateLines();
 528             ret = true;
 529             break;
 530         }
 531
 532         case GDK_Z:
 533         {
 534             if (MOD__CTRL) break; // Don't catch Ctrl+Z ("undo")
 535             Inkscape::Selection *selection = sp_desktop_selection (inkscape_active_desktop());
 536             for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
 537                 if (!SP_IS_3DBOX (i->data)) continue;
 538                 sp_3dbox_switch_front_face (SP_3DBOX (i->data), Box3D::Z);
 539             }
 540             bc->_vpdrag->updateLines();
 541             ret = true;
 542             break;
 543         }
 544
 545         case GDK_Escape:
 546             sp_desktop_selection(desktop)->clear();
 547             //TODO: make dragging escapable by Esc
 548             break;
 549
 550         case GDK_space:
 551             if (dragging) {
 552                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 553                                       event->button.time);
 554                 dragging = false;
 555                 if (!event_context->within_tolerance) {
 556                     // we've been dragging, finish the box
 557                     sp_3dbox_finish(bc);
 558                 }
 559                 // do not return true, so that space would work switching to selector
 560             }
 561             break;
 562
 563         default:
 564             break;
 565         }
 566         break;
 567     case GDK_KEY_RELEASE:
 568         switch (get_group0_keyval (&event->key)) {
 569         case GDK_Alt_L:
 570         case GDK_Alt_R:
 571         case GDK_Control_L:
 572         case GDK_Control_R:
 573         case GDK_Shift_L:
 574         case GDK_Shift_R:
 575         case GDK_Meta_L:  // Meta is when you press Shift+Alt
 576         case GDK_Meta_R:
 577             event_context->defaultMessageContext()->clear();
 578             break;
 579         default:
 580             break;
 581         }
 582         break;
 583     default:
 584         break;
 585     }
 586
 587     if (!ret) {
 588         if (((SPEventContextClass *) parent_class)->root_handler) {
 589             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 590         }
 591     }
 592
 593     return ret;
 594 }
 595
 596 static void sp_3dbox_drag(SP3DBoxContext &bc, guint state)
 597 {
 598     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 599
 600     if (!bc.item) {
 601
 602         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 603             return;
 604         }
 605
 606         /* Create object */
 607         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 608         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 609         repr->setAttribute("sodipodi:type", "inkscape:3dbox");
 610
 611         /* Set style */
 612         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 613
 614         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 615         Inkscape::GC::release(repr);
 616         bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());
 617
 618         /* Hook paths to the faces of the box (applies last used style if necessary) */
 619         for (int i = 0; i < 6; ++i) {
 620             SP_3DBOX(bc.item)->faces[i]->hook_path_to_3dbox();
 621         }
 622         // make rear face invisible in the beginning to avoid "flashing"
 623         SP_3DBOX (bc.item)->faces[5]->set_style (NULL, false);
 624
 625         bc.item->updateRepr();
 626         sp_3dbox_set_z_orders_in_the_first_place (SP_3DBOX (bc.item));
 627
 628         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 629         //       at this point (only after finishing the box), we must do this "manually"
 630         bc._vpdrag->updateDraggers();
 631
 632         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 633     }
 634
 635     // FIXME: remove these extra points
 636     NR::Point pt = bc.drag_ptB;
 637     NR::Point shift_pt = bc.drag_ptC;
 638
 639     NR::Rect r;
 640     if (!(state & GDK_SHIFT_MASK)) {
 641         r = Inkscape::snap_rectangular_box(desktop, bc.item, pt, bc.center, state);
 642     } else {
 643         r = Inkscape::snap_rectangular_box(desktop, bc.item, shift_pt, bc.center, state);
 644     }
 645
 646     SPEventContext *ec = SP_EVENT_CONTEXT(&bc);
 647     NR::Point origin_w(ec->xp, ec->yp);
 648     NR::Point origin(desktop->w2d(origin_w));
 649     sp_3dbox_position_set(bc);
 650     sp_3dbox_set_z_orders_in_the_first_place (SP_3DBOX (bc.item));
 651
 652     // status text
 653     //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
 654     //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
 655     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 656     //g_string_free(Ax, FALSE);
 657     //g_string_free(Ay, FALSE);
 658 }
 659
 660 static void sp_3dbox_finish(SP3DBoxContext *bc)
 661 {
 662     bc->_message_context->clear();
 663
 664     if ( bc->item != NULL ) {
 665         SPDesktop * desktop;
 666
 667         desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 668
 669         SP_OBJECT(bc->item)->updateRepr();
 670         sp_3dbox_set_ratios(SP_3DBOX(bc->item));
 671
 672         sp_canvas_end_forced_full_redraws(desktop->canvas);
 673
 674         sp_desktop_selection(desktop)->set(bc->item);
 675         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 676                          _("Create 3D box"));
 677
 678         bc->item = NULL;
 679     }
 680
 681     bc->ctrl_dragged = false;
 682     bc->extruded = false;
 683 }
 684
 685 /*
 686   Local Variables:
 687   mode:c++
 688   c-file-style:"stroustrup"
 689   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 690   indent-tabs-mode:nil
 691   fill-column:99
 692   End:
 693 */
 694 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :