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 //    sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
 133
 134     if (((SPEventContextClass *) parent_class)->finish) {
 135         ((SPEventContextClass *) parent_class)->finish(ec);
 136     }
 137 }
 138
 139
 140 static void sp_box3d_context_dispose(GObject *object)
 141 {
 142     Box3DContext *bc = SP_BOX3D_CONTEXT(object);
 143     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 144
 145     ec->enableGrDrag(false);
 146
 147     delete (bc->_vpdrag);
 148     bc->_vpdrag = NULL;
 149
 150     bc->sel_changed_connection.disconnect();
 151     bc->sel_changed_connection.~connection();
 152
 153     delete ec->shape_editor;
 154     ec->shape_editor = NULL;
 155
 156     /* fixme: This is necessary because we do not grab */
 157     if (bc->item) {
 158         sp_box3d_finish(bc);
 159     }
 160
 161     if (bc->_message_context) {
 162         delete bc->_message_context;
 163     }
 164
 165     G_OBJECT_CLASS(parent_class)->dispose(object);
 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     ec->shape_editor->unset_item(SH_KNOTHOLDER);
 178     SPItem *item = selection->singleItem();
 179     ec->shape_editor->set_item(item, SH_KNOTHOLDER);
 180
 181     if (selection->perspList().size() == 1) {
 182         // selecting a single box changes the current perspective
 183         ec->desktop->doc()->setCurrentPersp3D(selection->perspList().front());
 184     }
 185 }
 186
 187 /* Create a default perspective in document defs if none is present (which can happen, among other
 188  * circumstances, after 'vacuum defs' or when a pre-0.46 file is opened).
 189  */
 190 static void sp_box3d_context_ensure_persp_in_defs(SPDocument *document) {
 191     SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
 192
 193     bool has_persp = false;
 194     for (SPObject *child = sp_object_first_child(defs); child != NULL; child = SP_OBJECT_NEXT(child) ) {
 195         if (SP_IS_PERSP3D(child)) {
 196             has_persp = true;
 197             break;
 198         }
 199     }
 200
 201     if (!has_persp) {
 202         document->setCurrentPersp3D(persp3d_create_xml_element (document));
 203     }
 204 }
 205
 206 static void sp_box3d_context_setup(SPEventContext *ec)
 207 {
 208     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 209
 210     if (((SPEventContextClass *) parent_class)->setup) {
 211         ((SPEventContextClass *) parent_class)->setup(ec);
 212     }
 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     SPDocument *document = sp_desktop_document (desktop);
 271     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 272     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 273     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
 274
 275     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 276     Persp3D *cur_persp = document->getCurrentPersp3D();
 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             // This can happen after saving when the last remaining perspective was purged and must be recreated.
 304             if (!cur_persp) {
 305                 sp_box3d_context_ensure_persp_in_defs(document);
 306                 cur_persp = document->getCurrentPersp3D();
 307             }
 308
 309             /* Projective preimages of clicked point under current perspective */
 310             bc->drag_origin_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(button_dt), 0, Proj::Z);
 311             bc->drag_ptB_proj = bc->drag_origin_proj;
 312             bc->drag_ptC_proj = bc->drag_origin_proj;
 313             bc->drag_ptC_proj.normalize();
 314             bc->drag_ptC_proj[Proj::Z] = 0.25;
 315
 316             /* Snap center */
 317             SnapManager &m = desktop->namedview->snap_manager;
 318             m.setup(desktop, true, bc->item);
 319             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, button_dt, Inkscape::SNAPSOURCE_HANDLE);
 320             bc->center = from_2geom(button_dt);
 321
 322             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 323                                 ( GDK_KEY_PRESS_MASK |
 324                                   GDK_BUTTON_RELEASE_MASK       |
 325                                   GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK       |
 326                                   GDK_BUTTON_PRESS_MASK ),
 327                                 NULL, event->button.time);
 328             ret = TRUE;
 329         }
 330         break;
 331     case GDK_MOTION_NOTIFY:
 332         if ( dragging
 333              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 334         {
 335             if ( event_context->within_tolerance
 336                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 337                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 338                 break; // do not drag if we're within tolerance from origin
 339             }
 340             // Once the user has moved farther than tolerance from the original location
 341             // (indicating they intend to draw, not click), then always process the
 342             // motion notify coordinates as given (no snapping back to origin)
 343             event_context->within_tolerance = false;
 344
 345             Geom::Point const motion_w(event->motion.x,
 346                                        event->motion.y);
 347             Geom::Point motion_dt(desktop->w2d(motion_w));
 348
 349             SnapManager &m = desktop->namedview->snap_manager;
 350             m.setup(desktop, true, bc->item);
 351             m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, motion_dt, Inkscape::SNAPSOURCE_HANDLE);
 352
 353             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 354
 355             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 356                 // once shift is pressed, set bc->extruded
 357                 bc->extruded = true;
 358             }
 359
 360             if (!bc->extruded) {
 361                 bc->drag_ptB = from_2geom(motion_dt);
 362                 bc->drag_ptC = from_2geom(motion_dt);
 363
 364                 bc->drag_ptB_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(motion_dt), 0, Proj::Z);
 365                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 366                 bc->drag_ptC_proj.normalize();
 367                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 368             } else {
 369                 // Without Ctrl, motion of the extruded corner is constrained to the
 370                 // perspective line from drag_ptB to vanishing point Y.
 371                 if (!bc->ctrl_dragged) {
 372                     /* snapping */
 373                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, document->getCurrentPersp3D());
 374                     bc->drag_ptC = pline.closest_to (from_2geom(motion_dt));
 375
 376                     bc->drag_ptB_proj.normalize();
 377                     bc->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 378                 } else {
 379                     bc->drag_ptC = from_2geom(motion_dt);
 380
 381                     bc->drag_ptB_proj.normalize();
 382                     bc->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(motion_dt), bc->drag_ptB_proj[Proj::X], Proj::X);
 383                 }
 384                 Geom::Point pt2g = to_2geom(bc->drag_ptC);
 385                 m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g, Inkscape::SNAPSOURCE_HANDLE);
 386                 bc->drag_ptC = from_2geom(pt2g);
 387             }
 388
 389             sp_box3d_drag(*bc, event->motion.state);
 390
 391             ret = TRUE;
 392         }
 393         break;
 394     case GDK_BUTTON_RELEASE:
 395         event_context->xp = event_context->yp = 0;
 396         if ( event->button.button == 1  && !event_context->space_panning) {
 397             dragging = false;
 398             sp_event_context_discard_delayed_snap_event(event_context);
 399
 400             if (!event_context->within_tolerance) {
 401                 // we've been dragging, finish the box
 402                 sp_box3d_finish(bc);
 403             } else if (event_context->item_to_select) {
 404                 // no dragging, select clicked item if any
 405                 if (event->button.state & GDK_SHIFT_MASK) {
 406                     selection->toggle(event_context->item_to_select);
 407                 } else {
 408                     selection->set(event_context->item_to_select);
 409                 }
 410             } else {
 411                 // click in an empty space
 412                 selection->clear();
 413             }
 414
 415             event_context->item_to_select = NULL;
 416             ret = TRUE;
 417             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 418                                   event->button.time);
 419         }
 420         break;
 421     case GDK_KEY_PRESS:
 422         switch (get_group0_keyval (&event->key)) {
 423         case GDK_Up:
 424         case GDK_Down:
 425         case GDK_KP_Up:
 426         case GDK_KP_Down:
 427             // prevent the zoom field from activation
 428             if (!MOD__CTRL_ONLY)
 429                 ret = TRUE;
 430             break;
 431
 432         case GDK_bracketright:
 433             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::X, -180/snaps, MOD__ALT);
 434             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 435                              _("Change perspective (angle of PLs)"));
 436             ret = true;
 437             break;
 438
 439         case GDK_bracketleft:
 440             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::X, 180/snaps, MOD__ALT);
 441             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 442                              _("Change perspective (angle of PLs)"));
 443             ret = true;
 444             break;
 445
 446         case GDK_parenright:
 447             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Y, -180/snaps, MOD__ALT);
 448             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 449                              _("Change perspective (angle of PLs)"));
 450             ret = true;
 451             break;
 452
 453         case GDK_parenleft:
 454             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Y, 180/snaps, MOD__ALT);
 455             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 456                              _("Change perspective (angle of PLs)"));
 457             ret = true;
 458             break;
 459
 460         case GDK_braceright:
 461             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Z, -180/snaps, MOD__ALT);
 462             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 463                              _("Change perspective (angle of PLs)"));
 464             ret = true;
 465             break;
 466
 467         case GDK_braceleft:
 468             persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Z, 180/snaps, MOD__ALT);
 469             sp_document_done(document, SP_VERB_CONTEXT_3DBOX,
 470                              _("Change perspective (angle of PLs)"));
 471             ret = true;
 472             break;
 473
 474         /* TODO: what is this???
 475         case GDK_O:
 476             if (MOD__CTRL && MOD__SHIFT) {
 477                 Box3D::create_canvas_point(persp3d_get_VP(document()->getCurrentPersp3D(), Proj::W).affine(),
 478                                            6, 0xff00ff00);
 479             }
 480             ret = true;
 481             break;
 482         */
 483
 484         case GDK_g:
 485         case GDK_G:
 486             if (MOD__SHIFT_ONLY) {
 487                 sp_selection_to_guides(desktop);
 488                 ret = true;
 489             }
 490             break;
 491
 492         case GDK_p:
 493         case GDK_P:
 494             if (MOD__SHIFT_ONLY) {
 495                 if (document->getCurrentPersp3D()) {
 496                     persp3d_print_debugging_info (document->getCurrentPersp3D());
 497                 }
 498                 ret = true;
 499             }
 500             break;
 501
 502         case GDK_x:
 503         case GDK_X:
 504             if (MOD__ALT_ONLY) {
 505                 desktop->setToolboxFocusTo ("altx-box3d");
 506                 ret = TRUE;
 507             }
 508             if (MOD__SHIFT_ONLY) {
 509                 persp3d_toggle_VPs(selection->perspList(), Proj::X);
 510                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 511                 ret = true;
 512             }
 513             break;
 514
 515         case GDK_y:
 516         case GDK_Y:
 517             if (MOD__SHIFT_ONLY) {
 518                 persp3d_toggle_VPs(selection->perspList(), Proj::Y);
 519                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 520                 ret = true;
 521             }
 522             break;
 523
 524         case GDK_z:
 525         case GDK_Z:
 526             if (MOD__SHIFT_ONLY) {
 527                 persp3d_toggle_VPs(selection->perspList(), Proj::Z);
 528                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 529                 ret = true;
 530             }
 531             break;
 532
 533         case GDK_Escape:
 534             sp_desktop_selection(desktop)->clear();
 535             //TODO: make dragging escapable by Esc
 536             break;
 537
 538         case GDK_space:
 539             if (dragging) {
 540                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 541                                       event->button.time);
 542                 dragging = false;
 543                 sp_event_context_discard_delayed_snap_event(event_context);
 544                 if (!event_context->within_tolerance) {
 545                     // we've been dragging, finish the box
 546                     sp_box3d_finish(bc);
 547                 }
 548                 // do not return true, so that space would work switching to selector
 549             }
 550             break;
 551
 552         default:
 553             break;
 554         }
 555         break;
 556     default:
 557         break;
 558     }
 559
 560     if (!ret) {
 561         if (((SPEventContextClass *) parent_class)->root_handler) {
 562             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 563         }
 564     }
 565
 566     return ret;
 567 }
 568
 569 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 570 {
 571     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 572
 573     if (!bc.item) {
 574
 575         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 576             return;
 577         }
 578
 579         /* Create object */
 580         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 581         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 582         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 583
 584         /* Set style */
 585         sp_desktop_apply_style_tool (desktop, repr, "/tools/shapes/3dbox", false);
 586
 587         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 588         Inkscape::GC::release(repr);
 589         Inkscape::XML::Node *repr_side;
 590         // TODO: Incorporate this in box3d-side.cpp!
 591         for (int i = 0; i < 6; ++i) {
 592             repr_side = xml_doc->createElement("svg:path");
 593             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 594             repr->addChild(repr_side, NULL);
 595
 596             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 597
 598             guint desc = Box3D::int_to_face(i);
 599
 600             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 601             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 602             side->dir1 = Box3D::extract_first_axis_direction(plane);
 603             side->dir2 = Box3D::extract_second_axis_direction(plane);
 604             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 605
 606             /* Set style */
 607             box3d_side_apply_style(side);
 608
 609             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 610         }
 611
 612         box3d_set_z_orders(SP_BOX3D(bc.item));
 613         bc.item->updateRepr();
 614
 615         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 616         //       at this point (only after finishing the box), we must do this "manually"
 617         /* bc._vpdrag->updateDraggers(); */
 618
 619         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 620     }
 621
 622     g_assert(bc.item);
 623
 624     SPBox3D *box = SP_BOX3D(bc.item);
 625
 626     box->orig_corner0 = bc.drag_origin_proj;
 627     box->orig_corner7 = bc.drag_ptC_proj;
 628
 629     box3d_check_for_swapped_coords(box);
 630
 631     /* we need to call this from here (instead of from box3d_position_set(), for example)
 632        because z-order setting must not interfere with display updates during undo/redo */
 633     box3d_set_z_orders (box);
 634
 635     box3d_position_set(box);
 636
 637     // status text
 638     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 639 }
 640
 641 static void sp_box3d_finish(Box3DContext *bc)
 642 {
 643     bc->_message_context->clear();
 644     bc->ctrl_dragged = false;
 645     bc->extruded = false;
 646
 647     if ( bc->item != NULL ) {
 648         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 649         SPDocument *doc = sp_desktop_document(desktop);
 650         if (!doc || !doc->getCurrentPersp3D())
 651             return;
 652
 653         SPBox3D *box = SP_BOX3D(bc->item);
 654
 655         box->orig_corner0 = bc->drag_origin_proj;
 656         box->orig_corner7 = bc->drag_ptC_proj;
 657
 658         box->updateRepr();
 659
 660         box3d_relabel_corners(box);
 661
 662         sp_canvas_end_forced_full_redraws(desktop->canvas);
 663
 664         sp_desktop_selection(desktop)->set(bc->item);
 665         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 666                          _("Create 3D box"));
 667
 668         bc->item = NULL;
 669     }
 670 }
 671
 672 void sp_box3d_context_update_lines(SPEventContext *ec) {
 673     /*  update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
 674     if (SP_IS_BOX3D_CONTEXT (ec)) {
 675         Box3DContext *bc = SP_BOX3D_CONTEXT (ec);
 676         bc->_vpdrag->updateLines();
 677     }
 678 }
 679
 680 /*
 681   Local Variables:
 682   mode:c++
 683   c-file-style:"stroustrup"
 684   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 685   indent-tabs-mode:nil
 686   fill-column:99
 687   End:
 688 */
 689 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :