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 "prefs-utils.h"
  42 #include "context-fns.h"
  43 #include "inkscape.h"
  44 #include "desktop-style.h"
  45 #include "transf_mat_3x4.h"
  46 #include "perspective-line.h"
  47 #include "persp3d.h"
  48 #include "box3d-side.h"
  49 #include "document-private.h"
  50 #include "line-geometry.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
  58 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  59 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  60
  61 static void sp_box3d_drag(Box3DContext &bc, guint state);
  62 static void sp_box3d_finish(Box3DContext *bc);
  63
  64 static SPEventContextClass *parent_class;
  65
  66 GtkType sp_box3d_context_get_type()
  67 {
  68     static GType type = 0;
  69     if (!type) {
  70         GTypeInfo info = {
  71             sizeof(Box3DContextClass),
  72             NULL, NULL,
  73             (GClassInitFunc) sp_box3d_context_class_init,
  74             NULL, NULL,
  75             sizeof(Box3DContext),
  76             4,
  77             (GInstanceInitFunc) sp_box3d_context_init,
  78             NULL,    /* value_table */
  79         };
  80         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "Box3DContext", &info, (GTypeFlags) 0);
  81     }
  82     return type;
  83 }
  84
  85 static void sp_box3d_context_class_init(Box3DContextClass *klass)
  86 {
  87     GObjectClass *object_class = (GObjectClass *) klass;
  88     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
  89
  90     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
  91
  92     object_class->dispose = sp_box3d_context_dispose;
  93
  94     event_context_class->setup = sp_box3d_context_setup;
  95     event_context_class->root_handler  = sp_box3d_context_root_handler;
  96     event_context_class->item_handler  = sp_box3d_context_item_handler;
  97 }
  98
  99 static void sp_box3d_context_init(Box3DContext *box3d_context)
 100 {
 101     SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);
 102
 103     event_context->cursor_shape = cursor_3dbox_xpm;
 104     event_context->hot_x = 4;
 105     event_context->hot_y = 4;
 106     event_context->xp = 0;
 107     event_context->yp = 0;
 108     event_context->tolerance = 0;
 109     event_context->within_tolerance = false;
 110     event_context->item_to_select = NULL;
 111
 112     event_context->shape_repr = NULL;
 113     event_context->shape_knot_holder = NULL;
 114
 115     box3d_context->item = NULL;
 116
 117     box3d_context->ctrl_dragged = false;
 118     box3d_context->extruded = false;
 119
 120     box3d_context->_vpdrag = NULL;
 121
 122     new (&box3d_context->sel_changed_connection) sigc::connection();
 123 }
 124
 125 static void sp_box3d_context_dispose(GObject *object)
 126 {
 127     Box3DContext *bc = SP_BOX3D_CONTEXT(object);
 128     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 129
 130     ec->enableGrDrag(false);
 131
 132     delete (bc->_vpdrag);
 133     bc->_vpdrag = NULL;
 134
 135     bc->sel_changed_connection.disconnect();
 136     bc->sel_changed_connection.~connection();
 137
 138     /* fixme: This is necessary because we do not grab */
 139     if (bc->item) {
 140         sp_box3d_finish(bc);
 141     }
 142
 143     if (ec->shape_knot_holder) {
 144         sp_knot_holder_destroy(ec->shape_knot_holder);
 145         ec->shape_knot_holder = NULL;
 146     }
 147
 148     if (ec->shape_repr) { // remove old listener
 149         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 150         Inkscape::GC::release(ec->shape_repr);
 151         ec->shape_repr = 0;
 152     }
 153
 154     if (bc->_message_context) {
 155         delete bc->_message_context;
 156     }
 157
 158     G_OBJECT_CLASS(parent_class)->dispose(object);
 159 }
 160
 161 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 162     NULL, /* child_added */
 163     NULL, /* child_removed */
 164     ec_shape_event_attr_changed,
 165     NULL, /* content_changed */
 166     NULL  /* order_changed */
 167 };
 168
 169 /**
 170 \brief  Callback that processes the "changed" signal on the selection;
 171 destroys old and creates new knotholder
 172 */
 173 static void sp_box3d_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 174 {
 175     Box3DContext *bc = SP_BOX3D_CONTEXT(data);
 176     SPEventContext *ec = SP_EVENT_CONTEXT(bc);
 177
 178     if (ec->shape_knot_holder) { // destroy knotholder
 179         sp_knot_holder_destroy(ec->shape_knot_holder);
 180         ec->shape_knot_holder = NULL;
 181     }
 182
 183     if (ec->shape_repr) { // remove old listener
 184         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 185         Inkscape::GC::release(ec->shape_repr);
 186         ec->shape_repr = 0;
 187     }
 188
 189     SPItem *item = selection->singleItem();
 190     if (item) {
 191         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 192         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 193         if (shape_repr) {
 194             ec->shape_repr = shape_repr;
 195             Inkscape::GC::anchor(shape_repr);
 196             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 197         }
 198     }
 199
 200     if (selection->perspList().size() == 1) {
 201         // selecting a single box changes the current perspective
 202         ec->desktop->doc()->current_persp3d = selection->perspList().front();
 203     }
 204 }
 205
 206 /* create a default perspective in document defs if none is present
 207    (can happen after 'vacuum defs' or when a pre-0.46 file is opened) */
 208 static void sp_box3d_context_check_for_persp_in_defs(SPDocument *document) {
 209     SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
 210
 211     bool has_persp = false;
 212     for (SPObject *child = sp_object_first_child(defs); child != NULL; child = SP_OBJECT_NEXT(child) ) {
 213         if (SP_IS_PERSP3D(child)) {
 214             has_persp = true;
 215             break;
 216         }
 217     }
 218
 219     if (!has_persp) {
 220         document->current_persp3d = persp3d_create_xml_element (document);
 221     }
 222 }
 223
 224 static void sp_box3d_context_setup(SPEventContext *ec)
 225 {
 226     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 227
 228     if (((SPEventContextClass *) parent_class)->setup) {
 229         ((SPEventContextClass *) parent_class)->setup(ec);
 230     }
 231
 232     sp_box3d_context_check_for_persp_in_defs(sp_desktop_document (ec->desktop));
 233
 234     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 235     if (item) {
 236         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 237         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 238         if (shape_repr) {
 239             ec->shape_repr = shape_repr;
 240             Inkscape::GC::anchor(shape_repr);
 241             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 242         }
 243     }
 244
 245     bc->sel_changed_connection.disconnect();
 246     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 247         sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)
 248     );
 249
 250     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 251
 252     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 253         ec->enableSelectionCue();
 254     }
 255
 256     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 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     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 295
 296     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 297     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 298     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 299
 300     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 301
 302     gint ret = FALSE;
 303     switch (event->type) {
 304     case GDK_BUTTON_PRESS:
 305         if ( event->button.button == 1  && !event_context->space_panning) {
 306             NR::Point const button_w(event->button.x,
 307                                      event->button.y);
 308
 309             // save drag origin
 310             event_context->xp = (gint) button_w[NR::X];
 311             event_context->yp = (gint) button_w[NR::Y];
 312             event_context->within_tolerance = true;
 313
 314             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 315             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);
 316
 317             dragging = true;
 318
 319             /*  */
 320             NR::Point const button_dt(desktop->w2d(button_w));
 321             bc->drag_origin = button_dt;
 322             bc->drag_ptB = button_dt;
 323             bc->drag_ptC = button_dt;
 324
 325             /* Projective preimages of clicked point under current perspective */
 326             bc->drag_origin_proj = cur_persp->tmat.preimage (button_dt, 0, Proj::Z);
 327             bc->drag_ptB_proj = bc->drag_origin_proj;
 328             bc->drag_ptC_proj = bc->drag_origin_proj;
 329             bc->drag_ptC_proj.normalize();
 330             bc->drag_ptC_proj[Proj::Z] = 0.25;
 331
 332             /* Snap center */
 333             SnapManager const &m = desktop->namedview->snap_manager;
 334             bc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE,
 335                                     button_dt, bc->item).getPoint();
 336
 337             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 338                                 ( GDK_KEY_PRESS_MASK |
 339                                   GDK_BUTTON_RELEASE_MASK       |
 340                                   GDK_POINTER_MOTION_MASK       |
 341                                   GDK_BUTTON_PRESS_MASK ),
 342                                 NULL, event->button.time);
 343             ret = TRUE;
 344         }
 345         break;
 346     case GDK_MOTION_NOTIFY:
 347         if ( dragging
 348              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 349         {
 350             if ( event_context->within_tolerance
 351                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 352                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 353                 break; // do not drag if we're within tolerance from origin
 354             }
 355             // Once the user has moved farther than tolerance from the original location
 356             // (indicating they intend to draw, not click), then always process the
 357             // motion notify coordinates as given (no snapping back to origin)
 358             event_context->within_tolerance = false;
 359
 360             NR::Point const motion_w(event->motion.x,
 361                                      event->motion.y);
 362             NR::Point motion_dt(desktop->w2d(motion_w));
 363
 364             SnapManager const &m = desktop->namedview->snap_manager;
 365             motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, bc->item).getPoint();
 366
 367             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 368
 369             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 370                 // once shift is pressed, set bc->extruded
 371                 bc->extruded = true;
 372             }
 373
 374             if (!bc->extruded) {
 375                 bc->drag_ptB = motion_dt;
 376                 bc->drag_ptC = motion_dt;
 377
 378                 bc->drag_ptB_proj = cur_persp->tmat.preimage (motion_dt, 0, Proj::Z);
 379                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 380                 bc->drag_ptC_proj.normalize();
 381                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 382             } else {
 383                 // Without Ctrl, motion of the extruded corner is constrained to the
 384                 // perspective line from drag_ptB to vanishing point Y.
 385                 if (!bc->ctrl_dragged) {
 386                     /* snapping */
 387                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 388                     bc->drag_ptC = pline.closest_to (motion_dt);
 389
 390                     bc->drag_ptB_proj.normalize();
 391                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 392                 } else {
 393                     bc->drag_ptC = motion_dt;
 394
 395                     bc->drag_ptB_proj.normalize();
 396                     bc->drag_ptC_proj = cur_persp->tmat.preimage (motion_dt, bc->drag_ptB_proj[Proj::X], Proj::X);
 397                 }
 398                 bc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, bc->drag_ptC, bc->item).getPoint();
 399             }
 400
 401             sp_box3d_drag(*bc, event->motion.state);
 402
 403             ret = TRUE;
 404         }
 405         break;
 406     case GDK_BUTTON_RELEASE:
 407         event_context->xp = event_context->yp = 0;
 408         if ( event->button.button == 1  && !event_context->space_panning) {
 409             dragging = false;
 410
 411             if (!event_context->within_tolerance) {
 412                 // we've been dragging, finish the box
 413                 sp_box3d_finish(bc);
 414             } else if (event_context->item_to_select) {
 415                 // no dragging, select clicked item if any
 416                 if (event->button.state & GDK_SHIFT_MASK) {
 417                     selection->toggle(event_context->item_to_select);
 418                 } else {
 419                     selection->set(event_context->item_to_select);
 420                 }
 421             } else {
 422                 // click in an empty space
 423                 selection->clear();
 424             }
 425
 426             event_context->item_to_select = NULL;
 427             ret = TRUE;
 428             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 429                                   event->button.time);
 430         }
 431         break;
 432     case GDK_KEY_PRESS:
 433         switch (get_group0_keyval (&event->key)) {
 434         case GDK_Up:
 435         case GDK_Down:
 436         case GDK_KP_Up:
 437         case GDK_KP_Down:
 438             // prevent the zoom field from activation
 439             if (!MOD__CTRL_ONLY)
 440                 ret = TRUE;
 441             break;
 442
 443         case GDK_bracketright:
 444             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 445             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 446                              _("Change perspective (angle of PLs)"));
 447             ret = true;
 448             break;
 449
 450         case GDK_bracketleft:
 451             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 452             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 453                              _("Change perspective (angle of PLs)"));
 454             ret = true;
 455             break;
 456
 457         case GDK_parenright:
 458             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 459             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 460                              _("Change perspective (angle of PLs)"));
 461             ret = true;
 462             break;
 463
 464         case GDK_parenleft:
 465             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 466             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 467                              _("Change perspective (angle of PLs)"));
 468             ret = true;
 469             break;
 470
 471         case GDK_braceright:
 472             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 473             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 474                              _("Change perspective (angle of PLs)"));
 475             ret = true;
 476             break;
 477
 478         case GDK_braceleft:
 479             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 480             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 481                              _("Change perspective (angle of PLs)"));
 482             ret = true;
 483             break;
 484
 485         case GDK_O:
 486             if (MOD__CTRL && MOD__SHIFT) {
 487                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 488                                            6, 0xff00ff00);
 489             }
 490             ret = true;
 491             break;
 492
 493         case GDK_g:
 494         case GDK_G:
 495             if (MOD__SHIFT_ONLY) {
 496                 sp_selection_to_guides();
 497                 ret = true;
 498             }
 499             break;
 500
 501         case GDK_x:
 502         case GDK_X:
 503             if (MOD__ALT_ONLY) {
 504                 desktop->setToolboxFocusTo ("altx-box3d");
 505                 ret = TRUE;
 506             }
 507             if (MOD__SHIFT_ONLY) {
 508                 persp3d_toggle_VPs(selection->perspList(), Proj::X);
 509                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 510                 ret = true;
 511             }
 512             break;
 513
 514         case GDK_y:
 515         case GDK_Y:
 516             if (MOD__SHIFT_ONLY) {
 517                 persp3d_toggle_VPs(selection->perspList(), Proj::Y);
 518                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 519                 ret = true;
 520             }
 521             break;
 522
 523         case GDK_z:
 524         case GDK_Z:
 525             if (MOD__SHIFT_ONLY) {
 526                 persp3d_toggle_VPs(selection->perspList(), Proj::Z);
 527                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 528                 ret = true;
 529             }
 530             break;
 531
 532         case GDK_Escape:
 533             sp_desktop_selection(desktop)->clear();
 534             //TODO: make dragging escapable by Esc
 535             break;
 536
 537         case GDK_space:
 538             if (dragging) {
 539                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 540                                       event->button.time);
 541                 dragging = false;
 542                 if (!event_context->within_tolerance) {
 543                     // we've been dragging, finish the box
 544                     sp_box3d_finish(bc);
 545                 }
 546                 // do not return true, so that space would work switching to selector
 547             }
 548             break;
 549
 550         default:
 551             break;
 552         }
 553         break;
 554     default:
 555         break;
 556     }
 557
 558     if (!ret) {
 559         if (((SPEventContextClass *) parent_class)->root_handler) {
 560             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 561         }
 562     }
 563
 564     return ret;
 565 }
 566
 567 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 568 {
 569     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 570
 571     if (!bc.item) {
 572
 573         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 574             return;
 575         }
 576
 577         /* Create object */
 578         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 579         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 580         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 581
 582         /* Set style */
 583         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 584
 585         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 586         Inkscape::GC::release(repr);
 587         Inkscape::XML::Node *repr_side;
 588         // TODO: Incorporate this in box3d-side.cpp!
 589         for (int i = 0; i < 6; ++i) {
 590             repr_side = xml_doc->createElement("svg:path");
 591             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 592             repr->addChild(repr_side, NULL);
 593
 594             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 595
 596             guint desc = Box3D::int_to_face(i);
 597
 598             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 599             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 600             side->dir1 = Box3D::extract_first_axis_direction(plane);
 601             side->dir2 = Box3D::extract_second_axis_direction(plane);
 602             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 603
 604             /* Set style */
 605             box3d_side_apply_style(side);
 606
 607             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 608         }
 609
 610         box3d_set_z_orders(SP_BOX3D(bc.item));
 611         bc.item->updateRepr();
 612
 613         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 614         //       at this point (only after finishing the box), we must do this "manually"
 615         /**** bc._vpdrag->updateDraggers(); ****/
 616
 617         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 618     }
 619
 620     g_assert(bc.item);
 621
 622     SPBox3D *box = SP_BOX3D(bc.item);
 623
 624     box->orig_corner0 = bc.drag_origin_proj;
 625     box->orig_corner7 = bc.drag_ptC_proj;
 626
 627     box3d_check_for_swapped_coords(box);
 628
 629     /* we need to call this from here (instead of from box3d_position_set(), for example)
 630        because z-order setting must not interfere with display updates during undo/redo */
 631     box3d_set_z_orders (box);
 632
 633     box3d_position_set(box);
 634
 635     // status text
 636     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 637 }
 638
 639 static void sp_box3d_finish(Box3DContext *bc)
 640 {
 641     bc->_message_context->clear();
 642     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 643
 644     if ( bc->item != NULL ) {
 645         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 646
 647         SPBox3D *box = SP_BOX3D(bc->item);
 648
 649         box->orig_corner0 = bc->drag_origin_proj;
 650         box->orig_corner7 = bc->drag_ptC_proj;
 651
 652         box->updateRepr();
 653
 654         box3d_relabel_corners(box);
 655
 656         sp_canvas_end_forced_full_redraws(desktop->canvas);
 657
 658         sp_desktop_selection(desktop)->set(bc->item);
 659         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 660                          _("Create 3D box"));
 661
 662         bc->item = NULL;
 663     }
 664
 665     bc->ctrl_dragged = false;
 666     bc->extruded = false;
 667 }
 668
 669 void sp_box3d_context_update_lines(SPEventContext *ec) {
 670     /*  update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
 671     if (SP_IS_BOX3D_CONTEXT (ec)) {
 672         Box3DContext *bc = SP_BOX3D_CONTEXT (ec);
 673         bc->_vpdrag->updateLines();
 674     }
 675 }
 676
 677 /*
 678   Local Variables:
 679   mode:c++
 680   c-file-style:"stroustrup"
 681   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 682   indent-tabs-mode:nil
 683   fill-column:99
 684   End:
 685 */
 686 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :