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 "desktop-handles.h"
  28 #include "snap.h"
  29 #include "display/curve.h"
  30 #include "desktop.h"
  31 #include "message-context.h"
  32 #include "pixmaps/cursor-3dbox.xpm"
  33 #include "box3d.h"
  34 #include "box3d-context.h"
  35 #include "sp-metrics.h"
  36 #include <glibmm/i18n.h>
  37 #include "object-edit.h"
  38 #include "xml/repr.h"
  39 #include "xml/node-event-vector.h"
  40 #include "prefs-utils.h"
  41 #include "context-fns.h"
  42 #include "inkscape.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" // for debugging (see case GDK_P)
  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         sp_knot_holder_destroy(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         sp_knot_holder_destroy(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     SPDocument *doc = sp_desktop_document(bc->desktop);
 189     doc->persps_sel.clear();
 190     doc->persps_sel = persp3d_currently_selected_persps(ec);
 191
 192     SPItem *item = selection->singleItem();
 193     if (item) {
 194         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 195         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 196         if (shape_repr) {
 197             ec->shape_repr = shape_repr;
 198             Inkscape::GC::anchor(shape_repr);
 199             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 200         }
 201     }
 202
 203     if (doc->persps_sel.size() == 1) {
 204         // selecting a single box changes the current perspective
 205         doc->current_persp3d = *(doc->persps_sel.begin());
 206     }
 207 }
 208
 209 static void sp_box3d_context_setup(SPEventContext *ec)
 210 {
 211     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 212
 213     if (((SPEventContextClass *) parent_class)->setup) {
 214         ((SPEventContextClass *) parent_class)->setup(ec);
 215     }
 216
 217     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 218     if (item) {
 219         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 220         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 221         if (shape_repr) {
 222             ec->shape_repr = shape_repr;
 223             Inkscape::GC::anchor(shape_repr);
 224             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 225         }
 226     }
 227
 228     bc->sel_changed_connection.disconnect();
 229     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 230         sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)
 231     );
 232
 233     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 234
 235     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 236         ec->enableSelectionCue();
 237     }
 238
 239     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 240         ec->enableGrDrag();
 241     }
 242
 243     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 244 }
 245
 246 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 247 {
 248     SPDesktop *desktop = event_context->desktop;
 249
 250     gint ret = FALSE;
 251
 252     switch (event->type) {
 253     case GDK_BUTTON_PRESS:
 254         if ( event->button.button == 1 && !event_context->space_panning) {
 255             Inkscape::setup_for_drag_start(desktop, event_context, event);
 256             ret = TRUE;
 257         }
 258         break;
 259         // motion and release are always on root (why?)
 260     default:
 261         break;
 262     }
 263
 264     if (((SPEventContextClass *) parent_class)->item_handler) {
 265         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 266     }
 267
 268     return ret;
 269 }
 270
 271 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 272 {
 273     static bool dragging;
 274
 275     SPDesktop *desktop = event_context->desktop;
 276     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 277     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 278
 279     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 280     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 281     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 282
 283     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 284
 285     gint ret = FALSE;
 286     switch (event->type) {
 287     case GDK_BUTTON_PRESS:
 288         if ( event->button.button == 1  && !event_context->space_panning) {
 289             NR::Point const button_w(event->button.x,
 290                                      event->button.y);
 291
 292             // save drag origin
 293             event_context->xp = (gint) button_w[NR::X];
 294             event_context->yp = (gint) button_w[NR::Y];
 295             event_context->within_tolerance = true;
 296
 297             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 298             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);
 299
 300             dragging = true;
 301
 302             /*  */
 303             NR::Point const button_dt(desktop->w2d(button_w));
 304             bc->drag_origin = button_dt;
 305             bc->drag_ptB = button_dt;
 306             bc->drag_ptC = button_dt;
 307
 308             /* Projective preimages of clicked point under current perspective */
 309             bc->drag_origin_proj = cur_persp->tmat.preimage (button_dt, 0, Proj::Z);
 310             bc->drag_ptB_proj = bc->drag_origin_proj;
 311             bc->drag_ptC_proj = bc->drag_origin_proj;
 312             bc->drag_ptC_proj.normalize();
 313             bc->drag_ptC_proj[Proj::Z] = 0.25;
 314
 315             /* Snap center */
 316             SnapManager const &m = desktop->namedview->snap_manager;
 317             bc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE,
 318                                     button_dt, bc->item).getPoint();
 319
 320             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 321                                 ( GDK_KEY_PRESS_MASK |
 322                                   GDK_BUTTON_RELEASE_MASK       |
 323                                   GDK_POINTER_MOTION_MASK       |
 324                                   GDK_BUTTON_PRESS_MASK ),
 325                                 NULL, event->button.time);
 326             ret = TRUE;
 327         }
 328         break;
 329     case GDK_MOTION_NOTIFY:
 330         if ( dragging
 331              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 332         {
 333             if ( event_context->within_tolerance
 334                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 335                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 336                 break; // do not drag if we're within tolerance from origin
 337             }
 338             // Once the user has moved farther than tolerance from the original location
 339             // (indicating they intend to draw, not click), then always process the
 340             // motion notify coordinates as given (no snapping back to origin)
 341             event_context->within_tolerance = false;
 342
 343             NR::Point const motion_w(event->motion.x,
 344                                      event->motion.y);
 345             NR::Point motion_dt(desktop->w2d(motion_w));
 346
 347             SnapManager const &m = desktop->namedview->snap_manager;
 348             motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, bc->item).getPoint();
 349
 350             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 351
 352             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 353                 // once shift is pressed, set bc->extruded
 354                 bc->extruded = true;
 355             }
 356
 357             if (!bc->extruded) {
 358                 bc->drag_ptB = motion_dt;
 359                 bc->drag_ptC = motion_dt;
 360
 361                 bc->drag_ptB_proj = cur_persp->tmat.preimage (motion_dt, 0, Proj::Z);
 362                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 363                 bc->drag_ptC_proj.normalize();
 364                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 365             } else {
 366                 // Without Ctrl, motion of the extruded corner is constrained to the
 367                 // perspective line from drag_ptB to vanishing point Y.
 368                 if (!bc->ctrl_dragged) {
 369                     /* snapping */
 370                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 371                     bc->drag_ptC = pline.closest_to (motion_dt);
 372
 373                     bc->drag_ptB_proj.normalize();
 374                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 375                 } else {
 376                     bc->drag_ptC = motion_dt;
 377
 378                     bc->drag_ptB_proj.normalize();
 379                     bc->drag_ptC_proj = cur_persp->tmat.preimage (motion_dt, bc->drag_ptB_proj[Proj::X], Proj::X);
 380                 }
 381                 bc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, bc->drag_ptC, bc->item).getPoint();
 382                 if (bc->ctrl_dragged) {
 383                     g_print ("TODO: What should happen here?\n");
 384                     // Update bc->drag_ptB in case we are ctrl-dragging
 385                     /***
 386                     Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y, bc->_vpdrag->document->current_perspective);
 387                     Box3D::PerspectiveLine pl2 (bc->drag_ptB, Box3D::X, bc->_vpdrag->document->current_perspective);
 388                     NR::Point corner1 = pl1.meet(pl2);
 389
 390                     Box3D::PerspectiveLine pl3 (corner1, Box3D::X, bc->_vpdrag->document->current_perspective);
 391                     Box3D::PerspectiveLine pl4 (bc->drag_ptC, Box3D::Z, bc->_vpdrag->document->current_perspective);
 392                     bc->drag_ptB = pl3.meet(pl4);
 393                     ***/
 394                 }
 395             }
 396
 397             sp_box3d_drag(*bc, event->motion.state);
 398
 399             ret = TRUE;
 400         }
 401         break;
 402     case GDK_BUTTON_RELEASE:
 403         event_context->xp = event_context->yp = 0;
 404         if ( event->button.button == 1  && !event_context->space_panning) {
 405             dragging = false;
 406
 407             if (!event_context->within_tolerance) {
 408                 // we've been dragging, finish the box
 409                 sp_box3d_finish(bc);
 410             } else if (event_context->item_to_select) {
 411                 // no dragging, select clicked item if any
 412                 if (event->button.state & GDK_SHIFT_MASK) {
 413                     selection->toggle(event_context->item_to_select);
 414                 } else {
 415                     selection->set(event_context->item_to_select);
 416                 }
 417             } else {
 418                 // click in an empty space
 419                 selection->clear();
 420             }
 421
 422             event_context->item_to_select = NULL;
 423             ret = TRUE;
 424             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 425                                   event->button.time);
 426         }
 427         break;
 428     case GDK_KEY_PRESS:
 429         switch (get_group0_keyval (&event->key)) {
 430         case GDK_Alt_L:
 431         case GDK_Alt_R:
 432         case GDK_Control_L:
 433         case GDK_Control_R:
 434         case GDK_Shift_L:
 435         case GDK_Shift_R:
 436         case GDK_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
 437         case GDK_Meta_R:
 438             /***
 439             if (!dragging){
 440                 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 441                                             _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
 442                                             _("<b>Shift</b>: draw around the starting point"),
 443                                             NULL);
 444             }
 445             ***/
 446             break;
 447         case GDK_Up:
 448         case GDK_Down:
 449         case GDK_KP_Up:
 450         case GDK_KP_Down:
 451             // prevent the zoom field from activation
 452             if (!MOD__CTRL_ONLY)
 453                 ret = TRUE;
 454             break;
 455
 456         case GDK_bracketright:
 457             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 458             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 459                              _("Change perspective (angle of PLs)"));
 460             ret = true;
 461             break;
 462
 463         case GDK_bracketleft:
 464             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 465             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 466                              _("Change perspective (angle of PLs)"));
 467             ret = true;
 468             break;
 469
 470         case GDK_parenright:
 471             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 472             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 473                              _("Change perspective (angle of PLs)"));
 474             ret = true;
 475             break;
 476
 477         case GDK_parenleft:
 478             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 479             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 480                              _("Change perspective (angle of PLs)"));
 481             ret = true;
 482             break;
 483
 484         case GDK_braceright:
 485             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 486             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 487                              _("Change perspective (angle of PLs)"));
 488             ret = true;
 489             break;
 490
 491         case GDK_braceleft:
 492             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 493             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 494                              _("Change perspective (angle of PLs)"));
 495             ret = true;
 496             break;
 497
 498         case GDK_O:
 499             if (MOD__CTRL && MOD__SHIFT) {
 500                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 501                                            6, 0xff00ff00);
 502             }
 503             ret = true;
 504             break;
 505
 506         case GDK_I:
 507             if (MOD__ALT) {
 508                 persp3d_print_debugging_info_all (inkscape_active_document());
 509             } else {
 510                 persp3d_print_debugging_info (inkscape_active_document()->current_persp3d);
 511             }
 512             ret = true;
 513             break;
 514
 515         case GDK_P:
 516         {
 517             if (MOD__SHIFT && MOD__CTRL) break; // Don't catch Shift+Ctrl+P (Preferences dialog)
 518             SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(SP_ACTIVE_DOCUMENT);
 519             g_print ("=== Persp3D Objects: ==============================\n");
 520             for (SPObject *i = sp_object_first_child(SP_OBJECT(defs)); i != NULL; i = SP_OBJECT_NEXT(i) ) {
 521                 g_print ("Object encountered\n");
 522                 if (SP_IS_PERSP3D(i)) {
 523                     //g_print ("Encountered a Persp3D in defs\n");
 524                     SP_PERSP3D(i)->tmat.print();
 525                     g_print ("\n");
 526                     g_print ("Computing preimage of point (300, 400)\n");
 527                     SP_PERSP3D(i)->tmat.preimage (NR::Point (300, 400), 0, Proj::Z);
 528                     g_print ("Computing preimage of point (200, 500)\n");
 529                     SP_PERSP3D(i)->tmat.preimage (NR::Point (200, 500), 0, Proj::Z);
 530                 }
 531             }
 532             g_print ("===================================================\n");
 533
 534             ret = true;
 535             break;
 536         }
 537
 538         case GDK_V:
 539             if (bc->_vpdrag) {
 540                 bc->_vpdrag->printDraggers();
 541                 ret = true;
 542             } else {
 543                 g_print ("No VPDrag in Box3DContext.\n");
 544             }
 545             break;
 546
 547         case GDK_x:
 548             if (MOD__ALT_ONLY) {
 549                 desktop->setToolboxFocusTo ("altx-box3d");
 550                 ret = TRUE;
 551             }
 552             break;
 553         case GDK_X:
 554             if (MOD__CTRL) break; // Don't catch Ctrl+X ('cut') and Ctrl+Shift+X ('open XML editor')
 555             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::X);
 556             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 557             ret = true;
 558             break;
 559
 560         case GDK_Y:
 561         {
 562             if (MOD__CTRL) break; // Don't catch Ctrl+Y ("redo")
 563             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::Y);
 564             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 565             ret = true;
 566             break;
 567         }
 568
 569         case GDK_Z:
 570         {
 571             if (MOD__CTRL) break; // Don't catch Ctrl+Z ("undo")
 572             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::Z);
 573             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 574             ret = true;
 575             break;
 576         }
 577
 578         case GDK_Escape:
 579             sp_desktop_selection(desktop)->clear();
 580             //TODO: make dragging escapable by Esc
 581             break;
 582
 583         case GDK_space:
 584             if (dragging) {
 585                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 586                                       event->button.time);
 587                 dragging = false;
 588                 if (!event_context->within_tolerance) {
 589                     // we've been dragging, finish the box
 590                     sp_box3d_finish(bc);
 591                 }
 592                 // do not return true, so that space would work switching to selector
 593             }
 594             break;
 595
 596         default:
 597             break;
 598         }
 599         break;
 600     case GDK_KEY_RELEASE:
 601         switch (get_group0_keyval (&event->key)) {
 602         case GDK_Alt_L:
 603         case GDK_Alt_R:
 604         case GDK_Control_L:
 605         case GDK_Control_R:
 606         case GDK_Shift_L:
 607         case GDK_Shift_R:
 608         case GDK_Meta_L:  // Meta is when you press Shift+Alt
 609         case GDK_Meta_R:
 610             event_context->defaultMessageContext()->clear();
 611             break;
 612         default:
 613             break;
 614         }
 615         break;
 616     default:
 617         break;
 618     }
 619
 620     if (!ret) {
 621         if (((SPEventContextClass *) parent_class)->root_handler) {
 622             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 623         }
 624     }
 625
 626     return ret;
 627 }
 628
 629 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 630 {
 631     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 632
 633     if (!bc.item) {
 634
 635         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 636             return;
 637         }
 638
 639         /* Create object */
 640         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 641         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 642         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 643
 644         /* Set style */
 645         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 646
 647         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 648         Inkscape::GC::release(repr);
 649         /**** bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); ****/
 650         Inkscape::XML::Node *repr_side;
 651         // TODO: Incorporate this in box3d-side.cpp!
 652         for (int i = 0; i < 6; ++i) {
 653             repr_side = xml_doc->createElement("svg:path");
 654             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 655             repr->addChild(repr_side, NULL);
 656
 657             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 658
 659             guint desc = Box3D::int_to_face(i);
 660
 661             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 662             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 663             side->dir1 = Box3D::extract_first_axis_direction(plane);
 664             side->dir2 = Box3D::extract_second_axis_direction(plane);
 665             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 666
 667             /* Set style */
 668             box3d_side_apply_style(side);
 669
 670             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 671         }
 672
 673         box3d_set_z_orders(SP_BOX3D(bc.item));
 674         bc.item->updateRepr();
 675
 676         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 677         //       at this point (only after finishing the box), we must do this "manually"
 678         /**** bc._vpdrag->updateDraggers(); ****/
 679
 680         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 681     }
 682
 683     g_assert(bc.item);
 684
 685     SPBox3D *box = SP_BOX3D(bc.item);
 686
 687     box->orig_corner0 = bc.drag_origin_proj;
 688     box->orig_corner7 = bc.drag_ptC_proj;
 689
 690     box3d_check_for_swapped_coords(box);
 691
 692     /* we need to call this from here (instead of from box3d_position_set(), for example)
 693        because z-order setting must not interfere with display updates during undo/redo */
 694     box3d_set_z_orders (box);
 695
 696     box3d_position_set(box);
 697
 698     // status text
 699     //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
 700     //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
 701     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 702     //g_string_free(Ax, FALSE);
 703     //g_string_free(Ay, FALSE);
 704 }
 705
 706 static void sp_box3d_finish(Box3DContext *bc)
 707 {
 708     bc->_message_context->clear();
 709     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 710     //Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 711
 712     if ( bc->item != NULL ) {
 713         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 714
 715         SPBox3D *box = SP_BOX3D(bc->item);
 716
 717         box->orig_corner0 = bc->drag_origin_proj;
 718         box->orig_corner7 = bc->drag_ptC_proj;
 719
 720         box->updateRepr();
 721
 722         box3d_relabel_corners(box);
 723
 724         sp_canvas_end_forced_full_redraws(desktop->canvas);
 725
 726         sp_desktop_selection(desktop)->set(bc->item);
 727         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 728                          _("Create 3D box"));
 729
 730         bc->item = NULL;
 731     }
 732
 733     bc->ctrl_dragged = false;
 734     bc->extruded = false;
 735 }
 736
 737 /*
 738   Local Variables:
 739   mode:c++
 740   c-file-style:"stroustrup"
 741   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 742   indent-tabs-mode:nil
 743   fill-column:99
 744   End:
 745 */
 746 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :