src/box3d-context.cpp

   1 #define __SP_BOX3D_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 "selection-chemistry.h"
  28 #include "desktop-handles.h"
  29 #include "snap.h"
  30 #include "display/curve.h"
  31 #include "desktop.h"
  32 #include "message-context.h"
  33 #include "pixmaps/cursor-3dbox.xpm"
  34 #include "box3d.h"
  35 #include "box3d-context.h"
  36 #include "sp-metrics.h"
  37 #include <glibmm/i18n.h>
  38 #include "object-edit.h"
  39 #include "xml/repr.h"
  40 #include "xml/node-event-vector.h"
  41 #include "preferences.h"
  42 #include "context-fns.h"
  43 #include "desktop-style.h"
  44 #include "transf_mat_3x4.h"
  45 #include "perspective-line.h"
  46 #include "persp3d.h"
  47 #include "box3d-side.h"
  48 #include "document-private.h"
  49 #include "line-geometry.h"
  50
  51 static void sp_box3d_context_class_init(Box3DContextClass *klass);
  52 static void sp_box3d_context_init(Box3DContext *box3d_context);
  53 static void sp_box3d_context_dispose(GObject *object);
  54
  55 static void sp_box3d_context_setup(SPEventContext *ec);
  56
  57 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  58 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  59
  60 static void sp_box3d_drag(Box3DContext &bc, guint state);
  61 static void sp_box3d_finish(Box3DContext *bc);
  62
  63 static SPEventContextClass *parent_class;
  64
  65 GtkType sp_box3d_context_get_type()
  66 {
  67     static GType type = 0;
  68     if (!type) {
  69         GTypeInfo info = {
  70             sizeof(Box3DContextClass),
  71             NULL, NULL,
  72             (GClassInitFunc) sp_box3d_context_class_init,
  73             NULL, NULL,
  74             sizeof(Box3DContext),
  75             4,
  76             (GInstanceInitFunc) sp_box3d_context_init,
  77             NULL,    /* value_table */
  78         };
  79         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "Box3DContext", &info, (GTypeFlags) 0);
  80     }
  81     return type;
  82 }
  83
  84 static void sp_box3d_context_class_init(Box3DContextClass *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_box3d_context_dispose;
  92
  93     event_context_class->setup = sp_box3d_context_setup;
  94     event_context_class->root_handler  = sp_box3d_context_root_handler;
  95     event_context_class->item_handler  = sp_box3d_context_item_handler;
  96 }
  97
  98 static void sp_box3d_context_init(Box3DContext *box3d_context)
  99 {
 100     SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
 101
 102     event_context->cursor_shape = cursor_3dbox_xpm;
 103     event_context->hot_x = 4;
 104     event_context->hot_y = 4;
 105     event_context->xp = 0;
 106     event_context->yp = 0;
 107     event_context->tolerance = 0;
 108     event_context->within_tolerance = false;
 109     event_context->item_to_select = NULL;
 110
 111     event_context->shape_repr = NULL;
 112     event_context->shape_knot_holder = NULL;
 113
 114     box3d_context->item = NULL;
 115
 116     box3d_context->ctrl_dragged = false;
 117     box3d_context->extruded = false;
 118
 119     box3d_context->_vpdrag = NULL;
 120
 121     new (&box3d_context->sel_changed_connection) sigc::connection();
 122 }
 123
 124 static void sp_box3d_context_dispose(GObject *object)
 125 {
 126     Box3DContext *bc = SP_BOX3D_CONTEXT(object);
 127     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 128
 129     ec->enableGrDrag(false);
 130
 131     delete (bc->_vpdrag);
 132     bc->_vpdrag = NULL;
 133
 134     bc->sel_changed_connection.disconnect();
 135     bc->sel_changed_connection.~connection();
 136
 137     /* fixme: This is necessary because we do not grab */
 138     if (bc->item) {
 139         sp_box3d_finish(bc);
 140     }
 141
 142     if (ec->shape_knot_holder) {
 143         delete ec->shape_knot_holder;
 144         ec->shape_knot_holder = NULL;
 145     }
 146
 147     if (ec->shape_repr) { // remove old listener
 148         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 149         Inkscape::GC::release(ec->shape_repr);
 150         ec->shape_repr = 0;
 151     }
 152
 153     if (bc->_message_context) {
 154         delete bc->_message_context;
 155     }
 156
 157     G_OBJECT_CLASS(parent_class)->dispose(object);
 158 }
 159
 160 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 161     NULL, /* child_added */
 162     NULL, /* child_removed */
 163     ec_shape_event_attr_changed,
 164     NULL, /* content_changed */
 165     NULL  /* order_changed */
 166 };
 167
 168 /**
 169 \brief  Callback that processes the "changed" signal on the selection;
 170 destroys old and creates new knotholder
 171 */
 172 static void sp_box3d_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 173 {
 174     Box3DContext *bc = SP_BOX3D_CONTEXT(data);
 175     SPEventContext *ec = SP_EVENT_CONTEXT(bc);
 176
 177     if (ec->shape_knot_holder) { // destroy knotholder
 178         delete ec->shape_knot_holder;
 179         ec->shape_knot_holder = NULL;
 180     }
 181
 182     if (ec->shape_repr) { // remove old listener
 183         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 184         Inkscape::GC::release(ec->shape_repr);
 185         ec->shape_repr = 0;
 186     }
 187
 188     SPItem *item = selection->singleItem();
 189     if (item) {
 190         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 191         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 192         if (shape_repr) {
 193             ec->shape_repr = shape_repr;
 194             Inkscape::GC::anchor(shape_repr);
 195             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 196         }
 197     }
 198
 199     if (selection->perspList().size() == 1) {
 200         // selecting a single box changes the current perspective
 201         ec->desktop->doc()->current_persp3d = selection->perspList().front();
 202     }
 203 }
 204
 205 /* create a default perspective in document defs if none is present
 206    (can happen after 'vacuum defs' or when a pre-0.46 file is opened) */
 207 static void sp_box3d_context_check_for_persp_in_defs(SPDocument *document) {
 208     SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
 209
 210     bool has_persp = false;
 211     for (SPObject *child = sp_object_first_child(defs); child != NULL; child = SP_OBJECT_NEXT(child) ) {
 212         if (SP_IS_PERSP3D(child)) {
 213             has_persp = true;
 214             break;
 215         }
 216     }
 217
 218     if (!has_persp) {
 219         document->current_persp3d = persp3d_create_xml_element (document);
 220     }
 221 }
 222
 223 static void sp_box3d_context_setup(SPEventContext *ec)
 224 {
 225     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 226
 227     if (((SPEventContextClass *) parent_class)->setup) {
 228         ((SPEventContextClass *) parent_class)->setup(ec);
 229     }
 230
 231     sp_box3d_context_check_for_persp_in_defs(sp_desktop_document (ec->desktop));
 232
 233     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 234     if (item) {
 235         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 236         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 237         if (shape_repr) {
 238             ec->shape_repr = shape_repr;
 239             Inkscape::GC::anchor(shape_repr);
 240             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 241         }
 242     }
 243
 244     bc->sel_changed_connection.disconnect();
 245     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 246         sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)
 247     );
 248
 249     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 250     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 251
 252     if (prefs->getBool("/tools/shapes/selcue")) {
 253         ec->enableSelectionCue();
 254     }
 255
 256     if (prefs->getBool("/tools/shapes/gradientdrag")) {
 257         ec->enableGrDrag();
 258     }
 259
 260     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 261 }
 262
 263 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 264 {
 265     SPDesktop *desktop = event_context->desktop;
 266
 267     gint ret = FALSE;
 268
 269     switch (event->type) {
 270     case GDK_BUTTON_PRESS:
 271         if ( event->button.button == 1 && !event_context->space_panning) {
 272             Inkscape::setup_for_drag_start(desktop, event_context, event);
 273             ret = TRUE;
 274         }
 275         break;
 276         // motion and release are always on root (why?)
 277     default:
 278         break;
 279     }
 280
 281     if (((SPEventContextClass *) parent_class)->item_handler) {
 282         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 283     }
 284
 285     return ret;
 286 }
 287
 288 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 289 {
 290     static bool dragging;
 291
 292     SPDesktop *desktop = event_context->desktop;
 293     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 294     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 295     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 296
 297     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 298     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 299     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 300
 301     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 302
 303     gint ret = FALSE;
 304     switch (event->type) {
 305     case GDK_BUTTON_PRESS:
 306         if ( event->button.button == 1  && !event_context->space_panning) {
 307             Geom::Point const button_w(event->button.x,
 308                                        event->button.y);
 309
 310             // save drag origin
 311             event_context->xp = (gint) button_w[Geom::X];
 312             event_context->yp = (gint) button_w[Geom::Y];
 313             event_context->within_tolerance = true;
 314
 315             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 316             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);
 317
 318             dragging = true;
 319
 320             /*  */
 321             Geom::Point button_dt(desktop->w2d(button_w));
 322             bc->drag_origin = from_2geom(button_dt);
 323             bc->drag_ptB = from_2geom(button_dt);
 324             bc->drag_ptC = from_2geom(button_dt);
 325
 326             /* Projective preimages of clicked point under current perspective */
 327             bc->drag_origin_proj = cur_persp->tmat.preimage (from_2geom(button_dt), 0, Proj::Z);
 328             bc->drag_ptB_proj = bc->drag_origin_proj;
 329             bc->drag_ptC_proj = bc->drag_origin_proj;
 330             bc->drag_ptC_proj.normalize();
 331             bc->drag_ptC_proj[Proj::Z] = 0.25;
 332
 333             /* Snap center */
 334             SnapManager &m = desktop->namedview->snap_manager;
 335             m.setup(desktop, true, bc->item);
 336             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, button_dt);
 337             bc->center = from_2geom(button_dt);
 338
 339             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 340                                 ( GDK_KEY_PRESS_MASK |
 341                                   GDK_BUTTON_RELEASE_MASK       |
 342                                   GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK       |
 343                                   GDK_BUTTON_PRESS_MASK ),
 344                                 NULL, event->button.time);
 345             ret = TRUE;
 346         }
 347         break;
 348     case GDK_MOTION_NOTIFY:
 349         if ( dragging
 350              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 351         {
 352             if ( event_context->within_tolerance
 353                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 354                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 355                 break; // do not drag if we're within tolerance from origin
 356             }
 357             // Once the user has moved farther than tolerance from the original location
 358             // (indicating they intend to draw, not click), then always process the
 359             // motion notify coordinates as given (no snapping back to origin)
 360             event_context->within_tolerance = false;
 361
 362             Geom::Point const motion_w(event->motion.x,
 363                                        event->motion.y);
 364             Geom::Point motion_dt(desktop->w2d(motion_w));
 365
 366             SnapManager &m = desktop->namedview->snap_manager;
 367             m.setup(desktop, true, bc->item);
 368             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, motion_dt);
 369
 370             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 371
 372             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 373                 // once shift is pressed, set bc->extruded
 374                 bc->extruded = true;
 375             }
 376
 377             if (!bc->extruded) {
 378                 bc->drag_ptB = from_2geom(motion_dt);
 379                 bc->drag_ptC = from_2geom(motion_dt);
 380
 381                 bc->drag_ptB_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), 0, Proj::Z);
 382                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 383                 bc->drag_ptC_proj.normalize();
 384                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 385             } else {
 386                 // Without Ctrl, motion of the extruded corner is constrained to the
 387                 // perspective line from drag_ptB to vanishing point Y.
 388                 if (!bc->ctrl_dragged) {
 389                     /* snapping */
 390                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 391                     bc->drag_ptC = pline.closest_to (from_2geom(motion_dt));
 392
 393                     bc->drag_ptB_proj.normalize();
 394                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 395                 } else {
 396                     bc->drag_ptC = from_2geom(motion_dt);
 397
 398                     bc->drag_ptB_proj.normalize();
 399                     bc->drag_ptC_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), bc->drag_ptB_proj[Proj::X], Proj::X);
 400                 }
 401                 Geom::Point pt2g = to_2geom(bc->drag_ptC);
 402                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g);
 403                 bc->drag_ptC = from_2geom(pt2g);
 404             }
 405
 406             sp_box3d_drag(*bc, event->motion.state);
 407
 408             ret = TRUE;
 409         }
 410         break;
 411     case GDK_BUTTON_RELEASE:
 412         event_context->xp = event_context->yp = 0;
 413         if ( event->button.button == 1  && !event_context->space_panning) {
 414             dragging = false;
 415
 416             if (!event_context->within_tolerance) {
 417                 // we've been dragging, finish the box
 418                 sp_box3d_finish(bc);
 419             } else if (event_context->item_to_select) {
 420                 // no dragging, select clicked item if any
 421                 if (event->button.state & GDK_SHIFT_MASK) {
 422                     selection->toggle(event_context->item_to_select);
 423                 } else {
 424                     selection->set(event_context->item_to_select);
 425                 }
 426             } else {
 427                 // click in an empty space
 428                 selection->clear();
 429             }
 430
 431             event_context->item_to_select = NULL;
 432             ret = TRUE;
 433             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 434                                   event->button.time);
 435         }
 436         break;
 437     case GDK_KEY_PRESS:
 438         switch (get_group0_keyval (&event->key)) {
 439         case GDK_Up:
 440         case GDK_Down:
 441         case GDK_KP_Up:
 442         case GDK_KP_Down:
 443             // prevent the zoom field from activation
 444             if (!MOD__CTRL_ONLY)
 445                 ret = TRUE;
 446             break;
 447
 448         case GDK_bracketright:
 449             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 450             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 451                              _("Change perspective (angle of PLs)"));
 452             ret = true;
 453             break;
 454
 455         case GDK_bracketleft:
 456             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 457             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 458                              _("Change perspective (angle of PLs)"));
 459             ret = true;
 460             break;
 461
 462         case GDK_parenright:
 463             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 464             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 465                              _("Change perspective (angle of PLs)"));
 466             ret = true;
 467             break;
 468
 469         case GDK_parenleft:
 470             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 471             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 472                              _("Change perspective (angle of PLs)"));
 473             ret = true;
 474             break;
 475
 476         case GDK_braceright:
 477             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 478             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 479                              _("Change perspective (angle of PLs)"));
 480             ret = true;
 481             break;
 482
 483         case GDK_braceleft:
 484             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 485             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 486                              _("Change perspective (angle of PLs)"));
 487             ret = true;
 488             break;
 489
 490         case GDK_O:
 491             if (MOD__CTRL && MOD__SHIFT) {
 492                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 493                                            6, 0xff00ff00);
 494             }
 495             ret = true;
 496             break;
 497
 498         case GDK_g:
 499         case GDK_G:
 500             if (MOD__SHIFT_ONLY) {
 501                 sp_selection_to_guides(desktop);
 502                 ret = true;
 503             }
 504             break;
 505
 506         case GDK_x:
 507         case GDK_X:
 508             if (MOD__ALT_ONLY) {
 509                 desktop->setToolboxFocusTo ("altx-box3d");
 510                 ret = TRUE;
 511             }
 512             if (MOD__SHIFT_ONLY) {
 513                 persp3d_toggle_VPs(selection->perspList(), Proj::X);
 514                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 515                 ret = true;
 516             }
 517             break;
 518
 519         case GDK_y:
 520         case GDK_Y:
 521             if (MOD__SHIFT_ONLY) {
 522                 persp3d_toggle_VPs(selection->perspList(), Proj::Y);
 523                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 524                 ret = true;
 525             }
 526             break;
 527
 528         case GDK_z:
 529         case GDK_Z:
 530             if (MOD__SHIFT_ONLY) {
 531                 persp3d_toggle_VPs(selection->perspList(), Proj::Z);
 532                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 533                 ret = true;
 534             }
 535             break;
 536
 537         case GDK_Escape:
 538             sp_desktop_selection(desktop)->clear();
 539             //TODO: make dragging escapable by Esc
 540             break;
 541
 542         case GDK_space:
 543             if (dragging) {
 544                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 545                                       event->button.time);
 546                 dragging = false;
 547                 if (!event_context->within_tolerance) {
 548                     // we've been dragging, finish the box
 549                     sp_box3d_finish(bc);
 550                 }
 551                 // do not return true, so that space would work switching to selector
 552             }
 553             break;
 554
 555         default:
 556             break;
 557         }
 558         break;
 559     default:
 560         break;
 561     }
 562
 563     if (!ret) {
 564         if (((SPEventContextClass *) parent_class)->root_handler) {
 565             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 566         }
 567     }
 568
 569     return ret;
 570 }
 571
 572 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 573 {
 574     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 575
 576     if (!bc.item) {
 577
 578         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 579             return;
 580         }
 581
 582         /* Create object */
 583         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 584         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 585         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 586
 587         /* Set style */
 588         sp_desktop_apply_style_tool (desktop, repr, "/tools/shapes/3dbox", false);
 589
 590         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 591         Inkscape::GC::release(repr);
 592         Inkscape::XML::Node *repr_side;
 593         // TODO: Incorporate this in box3d-side.cpp!
 594         for (int i = 0; i < 6; ++i) {
 595             repr_side = xml_doc->createElement("svg:path");
 596             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 597             repr->addChild(repr_side, NULL);
 598
 599             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 600
 601             guint desc = Box3D::int_to_face(i);
 602
 603             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 604             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 605             side->dir1 = Box3D::extract_first_axis_direction(plane);
 606             side->dir2 = Box3D::extract_second_axis_direction(plane);
 607             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 608
 609             /* Set style */
 610             box3d_side_apply_style(side);
 611
 612             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 613         }
 614
 615         box3d_set_z_orders(SP_BOX3D(bc.item));
 616         bc.item->updateRepr();
 617
 618         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 619         //       at this point (only after finishing the box), we must do this "manually"
 620         /**** bc._vpdrag->updateDraggers(); ****/
 621
 622         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 623     }
 624
 625     g_assert(bc.item);
 626
 627     SPBox3D *box = SP_BOX3D(bc.item);
 628
 629     box->orig_corner0 = bc.drag_origin_proj;
 630     box->orig_corner7 = bc.drag_ptC_proj;
 631
 632     box3d_check_for_swapped_coords(box);
 633
 634     /* we need to call this from here (instead of from box3d_position_set(), for example)
 635        because z-order setting must not interfere with display updates during undo/redo */
 636     box3d_set_z_orders (box);
 637
 638     box3d_position_set(box);
 639
 640     // status text
 641     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 642 }
 643
 644 static void sp_box3d_finish(Box3DContext *bc)
 645 {
 646     bc->_message_context->clear();
 647     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 648
 649     if ( bc->item != NULL ) {
 650         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 651
 652         SPBox3D *box = SP_BOX3D(bc->item);
 653
 654         box->orig_corner0 = bc->drag_origin_proj;
 655         box->orig_corner7 = bc->drag_ptC_proj;
 656
 657         box->updateRepr();
 658
 659         box3d_relabel_corners(box);
 660
 661         sp_canvas_end_forced_full_redraws(desktop->canvas);
 662
 663         sp_desktop_selection(desktop)->set(bc->item);
 664         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 665                          _("Create 3D box"));
 666
 667         bc->item = NULL;
 668     }
 669
 670     bc->ctrl_dragged = false;
 671     bc->extruded = false;
 672 }
 673
 674 void sp_box3d_context_update_lines(SPEventContext *ec) {
 675     /*  update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
 676     if (SP_IS_BOX3D_CONTEXT (ec)) {
 677         Box3DContext *bc = SP_BOX3D_CONTEXT (ec);
 678         bc->_vpdrag->updateLines();
 679     }
 680 }
 681
 682 /*
 683   Local Variables:
 684   mode:c++
 685   c-file-style:"stroustrup"
 686   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 687   indent-tabs-mode:nil
 688   fill-column:99
 689   End:
 690 */
 691 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :