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 "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
 251     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 252         ec->enableSelectionCue();
 253     }
 254
 255     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 256         ec->enableGrDrag();
 257     }
 258
 259     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 260 }
 261
 262 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 263 {
 264     SPDesktop *desktop = event_context->desktop;
 265
 266     gint ret = FALSE;
 267
 268     switch (event->type) {
 269     case GDK_BUTTON_PRESS:
 270         if ( event->button.button == 1 && !event_context->space_panning) {
 271             Inkscape::setup_for_drag_start(desktop, event_context, event);
 272             ret = TRUE;
 273         }
 274         break;
 275         // motion and release are always on root (why?)
 276     default:
 277         break;
 278     }
 279
 280     if (((SPEventContextClass *) parent_class)->item_handler) {
 281         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 282     }
 283
 284     return ret;
 285 }
 286
 287 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 288 {
 289     static bool dragging;
 290
 291     SPDesktop *desktop = event_context->desktop;
 292     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 293     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 294
 295     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 296     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 297     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 298
 299     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 300
 301     gint ret = FALSE;
 302     switch (event->type) {
 303     case GDK_BUTTON_PRESS:
 304         if ( event->button.button == 1  && !event_context->space_panning) {
 305             NR::Point const button_w(event->button.x,
 306                                      event->button.y);
 307
 308             // save drag origin
 309             event_context->xp = (gint) button_w[NR::X];
 310             event_context->yp = (gint) button_w[NR::Y];
 311             event_context->within_tolerance = true;
 312
 313             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 314             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);
 315
 316             dragging = true;
 317
 318             /*  */
 319             Geom::Point button_dt(desktop->w2d(button_w));
 320             bc->drag_origin = from_2geom(button_dt);
 321             bc->drag_ptB = from_2geom(button_dt);
 322             bc->drag_ptC = from_2geom(button_dt);
 323
 324             /* Projective preimages of clicked point under current perspective */
 325             bc->drag_origin_proj = cur_persp->tmat.preimage (from_2geom(button_dt), 0, Proj::Z);
 326             bc->drag_ptB_proj = bc->drag_origin_proj;
 327             bc->drag_ptC_proj = bc->drag_origin_proj;
 328             bc->drag_ptC_proj.normalize();
 329             bc->drag_ptC_proj[Proj::Z] = 0.25;
 330
 331             /* Snap center */
 332             SnapManager &m = desktop->namedview->snap_manager;
 333             m.setup(desktop, true, bc->item);
 334             m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, button_dt);
 335             bc->center = from_2geom(button_dt);
 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 | GDK_POINTER_MOTION_HINT_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             Geom::Point motion_dt(to_2geom(desktop->w2d(motion_w)));
 363
 364             SnapManager &m = desktop->namedview->snap_manager;
 365             m.setup(desktop, true, bc->item);
 366             m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt);
 367
 368             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 369
 370             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 371                 // once shift is pressed, set bc->extruded
 372                 bc->extruded = true;
 373             }
 374
 375             if (!bc->extruded) {
 376                 bc->drag_ptB = from_2geom(motion_dt);
 377                 bc->drag_ptC = from_2geom(motion_dt);
 378
 379                 bc->drag_ptB_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), 0, Proj::Z);
 380                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 381                 bc->drag_ptC_proj.normalize();
 382                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 383             } else {
 384                 // Without Ctrl, motion of the extruded corner is constrained to the
 385                 // perspective line from drag_ptB to vanishing point Y.
 386                 if (!bc->ctrl_dragged) {
 387                     /* snapping */
 388                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 389                     bc->drag_ptC = pline.closest_to (from_2geom(motion_dt));
 390
 391                     bc->drag_ptB_proj.normalize();
 392                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 393                 } else {
 394                     bc->drag_ptC = from_2geom(motion_dt);
 395
 396                     bc->drag_ptB_proj.normalize();
 397                     bc->drag_ptC_proj = cur_persp->tmat.preimage (from_2geom(motion_dt), bc->drag_ptB_proj[Proj::X], Proj::X);
 398                 }
 399                 Geom::Point pt2g = to_2geom(bc->drag_ptC);
 400                 m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, pt2g);
 401                 bc->drag_ptC = from_2geom(pt2g);
 402             }
 403
 404             sp_box3d_drag(*bc, event->motion.state);
 405
 406             ret = TRUE;
 407         }
 408         break;
 409     case GDK_BUTTON_RELEASE:
 410         event_context->xp = event_context->yp = 0;
 411         if ( event->button.button == 1  && !event_context->space_panning) {
 412             dragging = false;
 413
 414             if (!event_context->within_tolerance) {
 415                 // we've been dragging, finish the box
 416                 sp_box3d_finish(bc);
 417             } else if (event_context->item_to_select) {
 418                 // no dragging, select clicked item if any
 419                 if (event->button.state & GDK_SHIFT_MASK) {
 420                     selection->toggle(event_context->item_to_select);
 421                 } else {
 422                     selection->set(event_context->item_to_select);
 423                 }
 424             } else {
 425                 // click in an empty space
 426                 selection->clear();
 427             }
 428
 429             event_context->item_to_select = NULL;
 430             ret = TRUE;
 431             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 432                                   event->button.time);
 433         }
 434         break;
 435     case GDK_KEY_PRESS:
 436         switch (get_group0_keyval (&event->key)) {
 437         case GDK_Up:
 438         case GDK_Down:
 439         case GDK_KP_Up:
 440         case GDK_KP_Down:
 441             // prevent the zoom field from activation
 442             if (!MOD__CTRL_ONLY)
 443                 ret = TRUE;
 444             break;
 445
 446         case GDK_bracketright:
 447             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 448             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 449                              _("Change perspective (angle of PLs)"));
 450             ret = true;
 451             break;
 452
 453         case GDK_bracketleft:
 454             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 455             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 456                              _("Change perspective (angle of PLs)"));
 457             ret = true;
 458             break;
 459
 460         case GDK_parenright:
 461             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 462             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 463                              _("Change perspective (angle of PLs)"));
 464             ret = true;
 465             break;
 466
 467         case GDK_parenleft:
 468             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 469             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 470                              _("Change perspective (angle of PLs)"));
 471             ret = true;
 472             break;
 473
 474         case GDK_braceright:
 475             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 476             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 477                              _("Change perspective (angle of PLs)"));
 478             ret = true;
 479             break;
 480
 481         case GDK_braceleft:
 482             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 483             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 484                              _("Change perspective (angle of PLs)"));
 485             ret = true;
 486             break;
 487
 488         case GDK_O:
 489             if (MOD__CTRL && MOD__SHIFT) {
 490                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 491                                            6, 0xff00ff00);
 492             }
 493             ret = true;
 494             break;
 495
 496         case GDK_g:
 497         case GDK_G:
 498             if (MOD__SHIFT_ONLY) {
 499                 sp_selection_to_guides(desktop);
 500                 ret = true;
 501             }
 502             break;
 503
 504         case GDK_x:
 505         case GDK_X:
 506             if (MOD__ALT_ONLY) {
 507                 desktop->setToolboxFocusTo ("altx-box3d");
 508                 ret = TRUE;
 509             }
 510             if (MOD__SHIFT_ONLY) {
 511                 persp3d_toggle_VPs(selection->perspList(), Proj::X);
 512                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 513                 ret = true;
 514             }
 515             break;
 516
 517         case GDK_y:
 518         case GDK_Y:
 519             if (MOD__SHIFT_ONLY) {
 520                 persp3d_toggle_VPs(selection->perspList(), Proj::Y);
 521                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 522                 ret = true;
 523             }
 524             break;
 525
 526         case GDK_z:
 527         case GDK_Z:
 528             if (MOD__SHIFT_ONLY) {
 529                 persp3d_toggle_VPs(selection->perspList(), Proj::Z);
 530                 bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 531                 ret = true;
 532             }
 533             break;
 534
 535         case GDK_Escape:
 536             sp_desktop_selection(desktop)->clear();
 537             //TODO: make dragging escapable by Esc
 538             break;
 539
 540         case GDK_space:
 541             if (dragging) {
 542                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 543                                       event->button.time);
 544                 dragging = false;
 545                 if (!event_context->within_tolerance) {
 546                     // we've been dragging, finish the box
 547                     sp_box3d_finish(bc);
 548                 }
 549                 // do not return true, so that space would work switching to selector
 550             }
 551             break;
 552
 553         default:
 554             break;
 555         }
 556         break;
 557     default:
 558         break;
 559     }
 560
 561     if (!ret) {
 562         if (((SPEventContextClass *) parent_class)->root_handler) {
 563             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 564         }
 565     }
 566
 567     return ret;
 568 }
 569
 570 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 571 {
 572     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 573
 574     if (!bc.item) {
 575
 576         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 577             return;
 578         }
 579
 580         /* Create object */
 581         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 582         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 583         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 584
 585         /* Set style */
 586         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 587
 588         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 589         Inkscape::GC::release(repr);
 590         Inkscape::XML::Node *repr_side;
 591         // TODO: Incorporate this in box3d-side.cpp!
 592         for (int i = 0; i < 6; ++i) {
 593             repr_side = xml_doc->createElement("svg:path");
 594             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 595             repr->addChild(repr_side, NULL);
 596
 597             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 598
 599             guint desc = Box3D::int_to_face(i);
 600
 601             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 602             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 603             side->dir1 = Box3D::extract_first_axis_direction(plane);
 604             side->dir2 = Box3D::extract_second_axis_direction(plane);
 605             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 606
 607             /* Set style */
 608             box3d_side_apply_style(side);
 609
 610             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 611         }
 612
 613         box3d_set_z_orders(SP_BOX3D(bc.item));
 614         bc.item->updateRepr();
 615
 616         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 617         //       at this point (only after finishing the box), we must do this "manually"
 618         /**** bc._vpdrag->updateDraggers(); ****/
 619
 620         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 621     }
 622
 623     g_assert(bc.item);
 624
 625     SPBox3D *box = SP_BOX3D(bc.item);
 626
 627     box->orig_corner0 = bc.drag_origin_proj;
 628     box->orig_corner7 = bc.drag_ptC_proj;
 629
 630     box3d_check_for_swapped_coords(box);
 631
 632     /* we need to call this from here (instead of from box3d_position_set(), for example)
 633        because z-order setting must not interfere with display updates during undo/redo */
 634     box3d_set_z_orders (box);
 635
 636     box3d_position_set(box);
 637
 638     // status text
 639     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 640 }
 641
 642 static void sp_box3d_finish(Box3DContext *bc)
 643 {
 644     bc->_message_context->clear();
 645     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 646
 647     if ( bc->item != NULL ) {
 648         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 649
 650         SPBox3D *box = SP_BOX3D(bc->item);
 651
 652         box->orig_corner0 = bc->drag_origin_proj;
 653         box->orig_corner7 = bc->drag_ptC_proj;
 654
 655         box->updateRepr();
 656
 657         box3d_relabel_corners(box);
 658
 659         sp_canvas_end_forced_full_redraws(desktop->canvas);
 660
 661         sp_desktop_selection(desktop)->set(bc->item);
 662         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 663                          _("Create 3D box"));
 664
 665         bc->item = NULL;
 666     }
 667
 668     bc->ctrl_dragged = false;
 669     bc->extruded = false;
 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 :