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 #include "shape-editor.h"
  51
  52 static void sp_box3d_context_class_init(Box3DContextClass *klass);
  53 static void sp_box3d_context_init(Box3DContext *box3d_context);
  54 static void sp_box3d_context_dispose(GObject *object);
  55
  56 static void sp_box3d_context_setup(SPEventContext *ec);
  57 static void sp_box3d_context_finish(SPEventContext *ec);
  58
  59 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  60 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  61
  62 static void sp_box3d_drag(Box3DContext &bc, guint state);
  63 static void sp_box3d_finish(Box3DContext *bc);
  64
  65 static SPEventContextClass *parent_class;
  66
  67 GtkType sp_box3d_context_get_type()
  68 {
  69     static GType type = 0;
  70     if (!type) {
  71         GTypeInfo info = {
  72             sizeof(Box3DContextClass),
  73             NULL, NULL,
  74             (GClassInitFunc) sp_box3d_context_class_init,
  75             NULL, NULL,
  76             sizeof(Box3DContext),
  77             4,
  78             (GInstanceInitFunc) sp_box3d_context_init,
  79             NULL,    /* value_table */
  80         };
  81         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "Box3DContext", &info, (GTypeFlags) 0);
  82     }
  83     return type;
  84 }
  85
  86 static void sp_box3d_context_class_init(Box3DContextClass *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_box3d_context_dispose;
  94
  95     event_context_class->setup = sp_box3d_context_setup;
  96     event_context_class->finish = sp_box3d_context_finish;
  97     event_context_class->root_handler  = sp_box3d_context_root_handler;
  98     event_context_class->item_handler  = sp_box3d_context_item_handler;
  99 }
 100
 101 static void sp_box3d_context_init(Box3DContext *box3d_context)
 102 {
 103     SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
 104
 105     event_context->cursor_shape = cursor_3dbox_xpm;
 106     event_context->hot_x = 4;
 107     event_context->hot_y = 4;
 108     event_context->xp = 0;
 109     event_context->yp = 0;
 110     event_context->tolerance = 0;
 111     event_context->within_tolerance = false;
 112     event_context->item_to_select = 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_finish(SPEventContext *ec)
 125 {
 126         Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 127         SPDesktop *desktop = ec->desktop;
 128
 129         sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME);
 130         sp_box3d_finish(bc);
 131     bc->sel_changed_connection.disconnect();
 132
 133     if (((SPEventContextClass *) parent_class)->finish) {
 134                 ((SPEventContextClass *) parent_class)->finish(ec);
 135         }
 136 }
 137
 138
 139 static void sp_box3d_context_dispose(GObject *object)
 140 {
 141     Box3DContext *bc = SP_BOX3D_CONTEXT(object);
 142     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 143
 144     ec->enableGrDrag(false);
 145
 146     delete (bc->_vpdrag);
 147     bc->_vpdrag = NULL;
 148
 149     bc->sel_changed_connection.disconnect();
 150     bc->sel_changed_connection.~connection();
 151
 152     delete ec->shape_editor;
 153     ec->shape_editor = NULL;
 154
 155     /* fixme: This is necessary because we do not grab */
 156     if (bc->item) {
 157         sp_box3d_finish(bc);
 158     }
 159
 160     if (bc->_message_context) {
 161         delete bc->_message_context;
 162     }
 163
 164     G_OBJECT_CLASS(parent_class)->dispose(object);
 165 }
 166
 167 /**
 168 \brief  Callback that processes the "changed" signal on the selection;
 169 destroys old and creates new knotholder
 170 */
 171 static void sp_box3d_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 172 {
 173     Box3DContext *bc = SP_BOX3D_CONTEXT(data);
 174     SPEventContext *ec = SP_EVENT_CONTEXT(bc);
 175
 176     ec->shape_editor->unset_item(SH_KNOTHOLDER);
 177     SPItem *item = selection->singleItem();
 178     ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 179
 180     if (selection->perspList().size() == 1) {
 181         // selecting a single box changes the current perspective
 182         ec->desktop->doc()->current_persp3d = selection->perspList().front();
 183     }
 184 }
 185
 186 /* create a default perspective in document defs if none is present
 187    (can happen after 'vacuum defs' or when a pre-0.46 file is opened) */
 188 static void sp_box3d_context_check_for_persp_in_defs(SPDocument *document) {
 189     SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
 190
 191     bool has_persp = false;
 192     for (SPObject *child = sp_object_first_child(defs); child != NULL; child = SP_OBJECT_NEXT(child) ) {
 193         if (SP_IS_PERSP3D(child)) {
 194             has_persp = true;
 195             break;
 196         }
 197     }
 198
 199     if (!has_persp) {
 200         document->current_persp3d = persp3d_create_xml_element (document);
 201     }
 202 }
 203
 204 static void sp_box3d_context_setup(SPEventContext *ec)
 205 {
 206     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 207
 208     if (((SPEventContextClass *) parent_class)->setup) {
 209         ((SPEventContextClass *) parent_class)->setup(ec);
 210     }
 211
 212     sp_box3d_context_check_for_persp_in_defs(sp_desktop_document (ec->desktop));
 213
 214     ec->shape_editor = new ShapeEditor(ec->desktop);
 215
 216     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 217     if (item) {
 218         ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 219     }
 220
 221     bc->sel_changed_connection.disconnect();
 222     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 223         sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)
 224     );
 225
 226     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 227     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 228
 229     if (prefs->getBool("/tools/shapes/selcue")) {
 230         ec->enableSelectionCue();
 231     }
 232
 233     if (prefs->getBool("/tools/shapes/gradientdrag")) {
 234         ec->enableGrDrag();
 235     }
 236
 237     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 238 }
 239
 240 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 241 {
 242     SPDesktop *desktop = event_context->desktop;
 243
 244     gint ret = FALSE;
 245
 246     switch (event->type) {
 247     case GDK_BUTTON_PRESS:
 248         if ( event->button.button == 1 && !event_context->space_panning) {
 249             Inkscape::setup_for_drag_start(desktop, event_context, event);
 250             ret = TRUE;
 251         }
 252         break;
 253         // motion and release are always on root (why?)
 254     default:
 255         break;
 256     }
 257
 258     if (((SPEventContextClass *) parent_class)->item_handler) {
 259         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 260     }
 261
 262     return ret;
 263 }
 264
 265 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 266 {
 267     static bool dragging;
 268
 269     SPDesktop *desktop = event_context->desktop;
 270     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 271     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 272     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 273
 274     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 275     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 276     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 277
 278     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 279
 280     gint ret = FALSE;
 281     switch (event->type) {
 282     case GDK_BUTTON_PRESS:
 283         if ( event->button.button == 1  && !event_context->space_panning) {
 284             Geom::Point const button_w(event->button.x,
 285                                        event->button.y);
 286
 287             // save drag origin
 288             event_context->xp = (gint) button_w[Geom::X];
 289             event_context->yp = (gint) button_w[Geom::Y];
 290             event_context->within_tolerance = true;
 291
 292             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 293             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);
 294
 295             dragging = true;
 296
 297             /*  */
 298             Geom::Point button_dt(desktop->w2d(button_w));
 299             bc->drag_origin = from_2geom(button_dt);
 300             bc->drag_ptB = from_2geom(button_dt);
 301             bc->drag_ptC = from_2geom(button_dt);
 302
 303             /* Projective preimages of clicked point under current perspective */
 304             bc->drag_origin_proj = cur_persp->tmat.preimage (from_2geom(button_dt), 0, Proj::Z);
 305             bc->drag_ptB_proj = bc->drag_origin_proj;
 306             bc->drag_ptC_proj = bc->drag_origin_proj;
 307             bc->drag_ptC_proj.normalize();
 308             bc->drag_ptC_proj[Proj::Z] = 0.25;
 309
 310             /* Snap center */
 311             SnapManager &m = desktop->namedview->snap_manager;
 312             m.setup(desktop, true, bc->item);
 313             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, button_dt, Inkscape::SNAPSOURCE_HANDLE);
 314             bc->center = from_2geom(button_dt);
 315
 316             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 317                                 ( GDK_KEY_PRESS_MASK |
 318                                   GDK_BUTTON_RELEASE_MASK       |
 319                                   GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK       |
 320                                   GDK_BUTTON_PRESS_MASK ),
 321                                 NULL, event->button.time);
 322             ret = TRUE;
 323         }
 324         break;
 325     case GDK_MOTION_NOTIFY:
 326         if ( dragging
 327              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 328         {
 329             if ( event_context->within_tolerance
 330                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 331                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 332                 break; // do not drag if we're within tolerance from origin
 333             }
 334             // Once the user has moved farther than tolerance from the original location
 335             // (indicating they intend to draw, not click), then always process the
 336             // motion notify coordinates as given (no snapping back to origin)
 337             event_context->within_tolerance = false;
 338
 339             Geom::Point const motion_w(event->motion.x,
 340                                        event->motion.y);
 341             Geom::Point motion_dt(desktop->w2d(motion_w));
 342
 343             SnapManager &m = desktop->namedview->snap_manager;
 344             m.setup(desktop, true, bc->item);
 345             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, motion_dt, Inkscape::SNAPSOURCE_HANDLE);
 346
 347             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 348
 349             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 350                 // once shift is pressed, set bc->extruded
 351                 bc->extruded = true;
 352             }
 353
 354             if (!bc->extruded) {
 355                 bc->drag_ptB = from_2geom(motion_dt);
 356                 bc->drag_ptC = from_2geom(motion_dt);
 357
 358                 bc->drag_ptB_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), 0, Proj::Z);
 359                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 360                 bc->drag_ptC_proj.normalize();
 361                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 362             } else {
 363                 // Without Ctrl, motion of the extruded corner is constrained to the
 364                 // perspective line from drag_ptB to vanishing point Y.
 365                 if (!bc->ctrl_dragged) {
 366                     /* snapping */
 367                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 368                     bc->drag_ptC = pline.closest_to (from_2geom(motion_dt));
 369
 370                     bc->drag_ptB_proj.normalize();
 371                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 372                 } else {
 373                     bc->drag_ptC = from_2geom(motion_dt);
 374
 375                     bc->drag_ptB_proj.normalize();
 376                     bc->drag_ptC_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), bc->drag_ptB_proj[Proj::X], Proj::X);
 377                 }
 378                 Geom::Point pt2g = to_2geom(bc->drag_ptC);
 379                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g, Inkscape::SNAPSOURCE_HANDLE);
 380                 bc->drag_ptC = from_2geom(pt2g);
 381             }
 382
 383             sp_box3d_drag(*bc, event->motion.state);
 384
 385             ret = TRUE;
 386         }
 387         break;
 388     case GDK_BUTTON_RELEASE:
 389         event_context->xp = event_context->yp = 0;
 390         if ( event->button.button == 1  && !event_context->space_panning) {
 391             dragging = false;
 392             sp_event_context_discard_delayed_snap_event(event_context);
 393
 394             if (!event_context->within_tolerance) {
 395                 // we've been dragging, finish the box
 396                 sp_box3d_finish(bc);
 397             } else if (event_context->item_to_select) {
 398                 // no dragging, select clicked item if any
 399                 if (event->button.state & GDK_SHIFT_MASK) {
 400                     selection->toggle(event_context->item_to_select);
 401                 } else {
 402                     selection->set(event_context->item_to_select);
 403                 }
 404             } else {
 405                 // click in an empty space
 406                 selection->clear();
 407             }
 408
 409             event_context->item_to_select = NULL;
 410             ret = TRUE;
 411             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 412                                   event->button.time);
 413         }
 414         break;
 415     case GDK_KEY_PRESS:
 416         switch (get_group0_keyval (&event->key)) {
 417         case GDK_Up:
 418         case GDK_Down:
 419         case GDK_KP_Up:
 420         case GDK_KP_Down:
 421             // prevent the zoom field from activation
 422             if (!MOD__CTRL_ONLY)
 423                 ret = TRUE;
 424             break;
 425
 426         case GDK_bracketright:
 427             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 428             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 429                              _("Change perspective (angle of PLs)"));
 430             ret = true;
 431             break;
 432
 433         case GDK_bracketleft:
 434             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 435             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 436                              _("Change perspective (angle of PLs)"));
 437             ret = true;
 438             break;
 439
 440         case GDK_parenright:
 441             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 442             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 443                              _("Change perspective (angle of PLs)"));
 444             ret = true;
 445             break;
 446
 447         case GDK_parenleft:
 448             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 449             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 450                              _("Change perspective (angle of PLs)"));
 451             ret = true;
 452             break;
 453
 454         case GDK_braceright:
 455             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 456             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 457                              _("Change perspective (angle of PLs)"));
 458             ret = true;
 459             break;
 460
 461         case GDK_braceleft:
 462             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 463             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 464                              _("Change perspective (angle of PLs)"));
 465             ret = true;
 466             break;
 467
 468         /* TODO: what is this???
 469         case GDK_O:
 470             if (MOD__CTRL && MOD__SHIFT) {
 471                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 472                                            6, 0xff00ff00);
 473             }
 474             ret = true;
 475             break;
 476         */
 477
 478         case GDK_g:
 479         case GDK_G:
 480             if (MOD__SHIFT_ONLY) {
 481                 sp_selection_to_guides(desktop);
 482                 ret = true;
 483             }
 484             break;
 485
 486         case GDK_x:
 487         case GDK_X:
 488             if (MOD__ALT_ONLY) {
 489                 desktop->setToolboxFocusTo ("altx-box3d");
 490                 ret = TRUE;
 491             }
 492             if (MOD__SHIFT_ONLY) {
 493                 persp3d_toggle_VPs(selection->perspList(), Proj::X);
 494                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 495                 ret = true;
 496             }
 497             break;
 498
 499         case GDK_y:
 500         case GDK_Y:
 501             if (MOD__SHIFT_ONLY) {
 502                 persp3d_toggle_VPs(selection->perspList(), Proj::Y);
 503                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 504                 ret = true;
 505             }
 506             break;
 507
 508         case GDK_z:
 509         case GDK_Z:
 510             if (MOD__SHIFT_ONLY) {
 511                 persp3d_toggle_VPs(selection->perspList(), Proj::Z);
 512                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 513                 ret = true;
 514             }
 515             break;
 516
 517         case GDK_Escape:
 518             sp_desktop_selection(desktop)->clear();
 519             //TODO: make dragging escapable by Esc
 520             break;
 521
 522         case GDK_space:
 523             if (dragging) {
 524                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 525                                       event->button.time);
 526                 dragging = false;
 527                 sp_event_context_discard_delayed_snap_event(event_context);
 528                 if (!event_context->within_tolerance) {
 529                     // we've been dragging, finish the box
 530                     sp_box3d_finish(bc);
 531                 }
 532                 // do not return true, so that space would work switching to selector
 533             }
 534             break;
 535
 536         default:
 537             break;
 538         }
 539         break;
 540     default:
 541         break;
 542     }
 543
 544     if (!ret) {
 545         if (((SPEventContextClass *) parent_class)->root_handler) {
 546             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 547         }
 548     }
 549
 550     return ret;
 551 }
 552
 553 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 554 {
 555     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 556
 557     if (!bc.item) {
 558
 559         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 560             return;
 561         }
 562
 563         /* Create object */
 564         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 565         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 566         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 567
 568         /* Set style */
 569         sp_desktop_apply_style_tool (desktop, repr, "/tools/shapes/3dbox", false);
 570
 571         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 572         Inkscape::GC::release(repr);
 573         Inkscape::XML::Node *repr_side;
 574         // TODO: Incorporate this in box3d-side.cpp!
 575         for (int i = 0; i < 6; ++i) {
 576             repr_side = xml_doc->createElement("svg:path");
 577             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 578             repr->addChild(repr_side, NULL);
 579
 580             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 581
 582             guint desc = Box3D::int_to_face(i);
 583
 584             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 585             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 586             side->dir1 = Box3D::extract_first_axis_direction(plane);
 587             side->dir2 = Box3D::extract_second_axis_direction(plane);
 588             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 589
 590             /* Set style */
 591             box3d_side_apply_style(side);
 592
 593             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 594         }
 595
 596         box3d_set_z_orders(SP_BOX3D(bc.item));
 597         bc.item->updateRepr();
 598
 599         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 600         //       at this point (only after finishing the box), we must do this "manually"
 601         /**** bc._vpdrag->updateDraggers(); ****/
 602
 603         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 604     }
 605
 606     g_assert(bc.item);
 607
 608     SPBox3D *box = SP_BOX3D(bc.item);
 609
 610     box->orig_corner0 = bc.drag_origin_proj;
 611     box->orig_corner7 = bc.drag_ptC_proj;
 612
 613     box3d_check_for_swapped_coords(box);
 614
 615     /* we need to call this from here (instead of from box3d_position_set(), for example)
 616        because z-order setting must not interfere with display updates during undo/redo */
 617     box3d_set_z_orders (box);
 618
 619     box3d_position_set(box);
 620
 621     // status text
 622     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 623 }
 624
 625 static void sp_box3d_finish(Box3DContext *bc)
 626 {
 627     bc->_message_context->clear();
 628     bc->ctrl_dragged = false;
 629     bc->extruded = false;
 630
 631     if ( bc->item != NULL ) {
 632         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 633         SPDocument *doc = sp_desktop_document(desktop);
 634         if (!doc || !doc->current_persp3d)
 635             return;
 636
 637         SPBox3D *box = SP_BOX3D(bc->item);
 638
 639         box->orig_corner0 = bc->drag_origin_proj;
 640         box->orig_corner7 = bc->drag_ptC_proj;
 641
 642         box->updateRepr();
 643
 644         box3d_relabel_corners(box);
 645
 646         sp_canvas_end_forced_full_redraws(desktop->canvas);
 647
 648         sp_desktop_selection(desktop)->set(bc->item);
 649         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 650                          _("Create 3D box"));
 651
 652         bc->item = NULL;
 653     }
 654 }
 655
 656 void sp_box3d_context_update_lines(SPEventContext *ec) {
 657     /*  update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
 658     if (SP_IS_BOX3D_CONTEXT (ec)) {
 659         Box3DContext *bc = SP_BOX3D_CONTEXT (ec);
 660         bc->_vpdrag->updateLines();
 661     }
 662 }
 663
 664 /*
 665   Local Variables:
 666   mode:c++
 667   c-file-style:"stroustrup"
 668   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 669   indent-tabs-mode:nil
 670   fill-column:99
 671   End:
 672 */
 673 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :