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 /* create a default perspective in document defs if none is present
 210    (can happen after 'vacuum defs' or when a pre-0.46 file is opened) */
 211 static void sp_box3d_context_check_for_persp_in_defs(SPDocument *document) {
 212     SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(document);
 213
 214     bool has_persp = false;
 215     for (SPObject *child = sp_object_first_child(defs); child != NULL; child = SP_OBJECT_NEXT(child) ) {
 216         if (SP_IS_PERSP3D(child)) {
 217             has_persp = true;
 218             break;
 219         }
 220     }
 221
 222     if (!has_persp) {
 223         document->current_persp3d = persp3d_create_xml_element (document);
 224     }
 225 }
 226
 227 static void sp_box3d_context_setup(SPEventContext *ec)
 228 {
 229     Box3DContext *bc = SP_BOX3D_CONTEXT(ec);
 230
 231     if (((SPEventContextClass *) parent_class)->setup) {
 232         ((SPEventContextClass *) parent_class)->setup(ec);
 233     }
 234
 235     sp_box3d_context_check_for_persp_in_defs(sp_desktop_document (ec->desktop));
 236
 237     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 238     if (item) {
 239         ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);
 240         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 241         if (shape_repr) {
 242             ec->shape_repr = shape_repr;
 243             Inkscape::GC::anchor(shape_repr);
 244             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 245         }
 246     }
 247
 248     bc->sel_changed_connection.disconnect();
 249     bc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 250         sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)
 251     );
 252
 253     bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));
 254
 255     if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {
 256         ec->enableSelectionCue();
 257     }
 258
 259     if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {
 260         ec->enableGrDrag();
 261     }
 262
 263     bc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 264 }
 265
 266 static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
 267 {
 268     SPDesktop *desktop = event_context->desktop;
 269
 270     gint ret = FALSE;
 271
 272     switch (event->type) {
 273     case GDK_BUTTON_PRESS:
 274         if ( event->button.button == 1 && !event_context->space_panning) {
 275             Inkscape::setup_for_drag_start(desktop, event_context, event);
 276             ret = TRUE;
 277         }
 278         break;
 279         // motion and release are always on root (why?)
 280     default:
 281         break;
 282     }
 283
 284     if (((SPEventContextClass *) parent_class)->item_handler) {
 285         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
 286     }
 287
 288     return ret;
 289 }
 290
 291 static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 292 {
 293     static bool dragging;
 294
 295     SPDesktop *desktop = event_context->desktop;
 296     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 297     int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12);
 298
 299     Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);
 300     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 301     Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 302
 303     event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 304
 305     gint ret = FALSE;
 306     switch (event->type) {
 307     case GDK_BUTTON_PRESS:
 308         if ( event->button.button == 1  && !event_context->space_panning) {
 309             NR::Point const button_w(event->button.x,
 310                                      event->button.y);
 311
 312             // save drag origin
 313             event_context->xp = (gint) button_w[NR::X];
 314             event_context->yp = (gint) button_w[NR::Y];
 315             event_context->within_tolerance = true;
 316
 317             // remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt
 318             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);
 319
 320             dragging = true;
 321
 322             /*  */
 323             NR::Point const button_dt(desktop->w2d(button_w));
 324             bc->drag_origin = button_dt;
 325             bc->drag_ptB = button_dt;
 326             bc->drag_ptC = button_dt;
 327
 328             /* Projective preimages of clicked point under current perspective */
 329             bc->drag_origin_proj = cur_persp->tmat.preimage (button_dt, 0, Proj::Z);
 330             bc->drag_ptB_proj = bc->drag_origin_proj;
 331             bc->drag_ptC_proj = bc->drag_origin_proj;
 332             bc->drag_ptC_proj.normalize();
 333             bc->drag_ptC_proj[Proj::Z] = 0.25;
 334
 335             /* Snap center */
 336             SnapManager const &m = desktop->namedview->snap_manager;
 337             bc->center = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE,
 338                                     button_dt, bc->item).getPoint();
 339
 340             sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 341                                 ( GDK_KEY_PRESS_MASK |
 342                                   GDK_BUTTON_RELEASE_MASK       |
 343                                   GDK_POINTER_MOTION_MASK       |
 344                                   GDK_BUTTON_PRESS_MASK ),
 345                                 NULL, event->button.time);
 346             ret = TRUE;
 347         }
 348         break;
 349     case GDK_MOTION_NOTIFY:
 350         if ( dragging
 351              && ( event->motion.state & GDK_BUTTON1_MASK )  && !event_context->space_panning)
 352         {
 353             if ( event_context->within_tolerance
 354                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
 355                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
 356                 break; // do not drag if we're within tolerance from origin
 357             }
 358             // Once the user has moved farther than tolerance from the original location
 359             // (indicating they intend to draw, not click), then always process the
 360             // motion notify coordinates as given (no snapping back to origin)
 361             event_context->within_tolerance = false;
 362
 363             NR::Point const motion_w(event->motion.x,
 364                                      event->motion.y);
 365             NR::Point motion_dt(desktop->w2d(motion_w));
 366
 367             SnapManager const &m = desktop->namedview->snap_manager;
 368             motion_dt = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, motion_dt, bc->item).getPoint();
 369
 370             bc->ctrl_dragged  = event->motion.state & GDK_CONTROL_MASK;
 371
 372             if (event->motion.state & GDK_SHIFT_MASK && !bc->extruded && bc->item) {
 373                 // once shift is pressed, set bc->extruded
 374                 bc->extruded = true;
 375             }
 376
 377             if (!bc->extruded) {
 378                 bc->drag_ptB = motion_dt;
 379                 bc->drag_ptC = motion_dt;
 380
 381                 bc->drag_ptB_proj = cur_persp->tmat.preimage (motion_dt, 0, Proj::Z);
 382                 bc->drag_ptC_proj = bc->drag_ptB_proj;
 383                 bc->drag_ptC_proj.normalize();
 384                 bc->drag_ptC_proj[Proj::Z] = 0.25;
 385             } else {
 386                 // Without Ctrl, motion of the extruded corner is constrained to the
 387                 // perspective line from drag_ptB to vanishing point Y.
 388                 if (!bc->ctrl_dragged) {
 389                     /* snapping */
 390                     Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, SP_ACTIVE_DOCUMENT->current_persp3d);
 391                     bc->drag_ptC = pline.closest_to (motion_dt);
 392
 393                     bc->drag_ptB_proj.normalize();
 394                     bc->drag_ptC_proj = cur_persp->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);
 395                 } else {
 396                     bc->drag_ptC = motion_dt;
 397
 398                     bc->drag_ptB_proj.normalize();
 399                     bc->drag_ptC_proj = cur_persp->tmat.preimage (motion_dt, bc->drag_ptB_proj[Proj::X], Proj::X);
 400                 }
 401                 bc->drag_ptC = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, bc->drag_ptC, bc->item).getPoint();
 402                 if (bc->ctrl_dragged) {
 403                     g_print ("TODO: What should happen here?\n");
 404                     // Update bc->drag_ptB in case we are ctrl-dragging
 405                     /***
 406                     Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y, bc->_vpdrag->document->current_perspective);
 407                     Box3D::PerspectiveLine pl2 (bc->drag_ptB, Box3D::X, bc->_vpdrag->document->current_perspective);
 408                     NR::Point corner1 = pl1.meet(pl2);
 409
 410                     Box3D::PerspectiveLine pl3 (corner1, Box3D::X, bc->_vpdrag->document->current_perspective);
 411                     Box3D::PerspectiveLine pl4 (bc->drag_ptC, Box3D::Z, bc->_vpdrag->document->current_perspective);
 412                     bc->drag_ptB = pl3.meet(pl4);
 413                     ***/
 414                 }
 415             }
 416
 417             sp_box3d_drag(*bc, event->motion.state);
 418
 419             ret = TRUE;
 420         }
 421         break;
 422     case GDK_BUTTON_RELEASE:
 423         event_context->xp = event_context->yp = 0;
 424         if ( event->button.button == 1  && !event_context->space_panning) {
 425             dragging = false;
 426
 427             if (!event_context->within_tolerance) {
 428                 // we've been dragging, finish the box
 429                 sp_box3d_finish(bc);
 430             } else if (event_context->item_to_select) {
 431                 // no dragging, select clicked item if any
 432                 if (event->button.state & GDK_SHIFT_MASK) {
 433                     selection->toggle(event_context->item_to_select);
 434                 } else {
 435                     selection->set(event_context->item_to_select);
 436                 }
 437             } else {
 438                 // click in an empty space
 439                 selection->clear();
 440             }
 441
 442             event_context->item_to_select = NULL;
 443             ret = TRUE;
 444             sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 445                                   event->button.time);
 446         }
 447         break;
 448     case GDK_KEY_PRESS:
 449         switch (get_group0_keyval (&event->key)) {
 450         case GDK_Alt_L:
 451         case GDK_Alt_R:
 452         case GDK_Control_L:
 453         case GDK_Control_R:
 454         case GDK_Shift_L:
 455         case GDK_Shift_R:
 456         case GDK_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
 457         case GDK_Meta_R:
 458             /***
 459             if (!dragging){
 460                 sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
 461                                             _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
 462                                             _("<b>Shift</b>: draw around the starting point"),
 463                                             NULL);
 464             }
 465             ***/
 466             break;
 467         case GDK_Up:
 468         case GDK_Down:
 469         case GDK_KP_Up:
 470         case GDK_KP_Down:
 471             // prevent the zoom field from activation
 472             if (!MOD__CTRL_ONLY)
 473                 ret = TRUE;
 474             break;
 475
 476         case GDK_bracketright:
 477             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, -180/snaps, MOD__ALT);
 478             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 479                              _("Change perspective (angle of PLs)"));
 480             ret = true;
 481             break;
 482
 483         case GDK_bracketleft:
 484             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::X, 180/snaps, MOD__ALT);
 485             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 486                              _("Change perspective (angle of PLs)"));
 487             ret = true;
 488             break;
 489
 490         case GDK_parenright:
 491             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, -180/snaps, MOD__ALT);
 492             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 493                              _("Change perspective (angle of PLs)"));
 494             ret = true;
 495             break;
 496
 497         case GDK_parenleft:
 498             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Y, 180/snaps, MOD__ALT);
 499             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 500                              _("Change perspective (angle of PLs)"));
 501             ret = true;
 502             break;
 503
 504         case GDK_braceright:
 505             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, -180/snaps, MOD__ALT);
 506             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 507                              _("Change perspective (angle of PLs)"));
 508             ret = true;
 509             break;
 510
 511         case GDK_braceleft:
 512             persp3d_rotate_VP (inkscape_active_document()->current_persp3d, Proj::Z, 180/snaps, MOD__ALT);
 513             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 514                              _("Change perspective (angle of PLs)"));
 515             ret = true;
 516             break;
 517
 518         case GDK_O:
 519             if (MOD__CTRL && MOD__SHIFT) {
 520                 Box3D::create_canvas_point(persp3d_get_VP(inkscape_active_document()->current_persp3d, Proj::W).affine(),
 521                                            6, 0xff00ff00);
 522             }
 523             ret = true;
 524             break;
 525
 526         case GDK_I:
 527             if (MOD__ALT) {
 528                 persp3d_print_debugging_info_all (inkscape_active_document());
 529             } else {
 530                 persp3d_print_debugging_info (inkscape_active_document()->current_persp3d);
 531             }
 532             ret = true;
 533             break;
 534
 535         case GDK_P:
 536         {
 537             if (MOD__SHIFT && MOD__CTRL) break; // Don't catch Shift+Ctrl+P (Preferences dialog)
 538             SPDefs *defs = (SPDefs *) SP_DOCUMENT_DEFS(SP_ACTIVE_DOCUMENT);
 539             g_print ("=== Persp3D Objects: ==============================\n");
 540             for (SPObject *i = sp_object_first_child(SP_OBJECT(defs)); i != NULL; i = SP_OBJECT_NEXT(i) ) {
 541                 g_print ("Object encountered\n");
 542                 if (SP_IS_PERSP3D(i)) {
 543                     //g_print ("Encountered a Persp3D in defs\n");
 544                     SP_PERSP3D(i)->tmat.print();
 545                     g_print ("\n");
 546                     g_print ("Computing preimage of point (300, 400)\n");
 547                     SP_PERSP3D(i)->tmat.preimage (NR::Point (300, 400), 0, Proj::Z);
 548                     g_print ("Computing preimage of point (200, 500)\n");
 549                     SP_PERSP3D(i)->tmat.preimage (NR::Point (200, 500), 0, Proj::Z);
 550                 }
 551             }
 552             g_print ("===================================================\n");
 553
 554             ret = true;
 555             break;
 556         }
 557
 558         case GDK_V:
 559             if (bc->_vpdrag) {
 560                 bc->_vpdrag->printDraggers();
 561                 ret = true;
 562             } else {
 563                 g_print ("No VPDrag in Box3DContext.\n");
 564             }
 565             break;
 566
 567         case GDK_x:
 568             if (MOD__ALT_ONLY) {
 569                 desktop->setToolboxFocusTo ("altx-box3d");
 570                 ret = TRUE;
 571             }
 572             break;
 573         case GDK_X:
 574             if (MOD__CTRL) break; // Don't catch Ctrl+X ('cut') and Ctrl+Shift+X ('open XML editor')
 575             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::X);
 576             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 577             ret = true;
 578             break;
 579
 580         case GDK_Y:
 581         {
 582             if (MOD__CTRL) break; // Don't catch Ctrl+Y ("redo")
 583             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::Y);
 584             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 585             ret = true;
 586             break;
 587         }
 588
 589         case GDK_Z:
 590         {
 591             if (MOD__CTRL) break; // Don't catch Ctrl+Z ("undo")
 592             persp3d_toggle_VPs(persp3d_currently_selected_persps(event_context), Proj::Z);
 593             bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?
 594             ret = true;
 595             break;
 596         }
 597
 598         case GDK_Escape:
 599             sp_desktop_selection(desktop)->clear();
 600             //TODO: make dragging escapable by Esc
 601             break;
 602
 603         case GDK_space:
 604             if (dragging) {
 605                 sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
 606                                       event->button.time);
 607                 dragging = false;
 608                 if (!event_context->within_tolerance) {
 609                     // we've been dragging, finish the box
 610                     sp_box3d_finish(bc);
 611                 }
 612                 // do not return true, so that space would work switching to selector
 613             }
 614             break;
 615
 616         default:
 617             break;
 618         }
 619         break;
 620     case GDK_KEY_RELEASE:
 621         switch (get_group0_keyval (&event->key)) {
 622         case GDK_Alt_L:
 623         case GDK_Alt_R:
 624         case GDK_Control_L:
 625         case GDK_Control_R:
 626         case GDK_Shift_L:
 627         case GDK_Shift_R:
 628         case GDK_Meta_L:  // Meta is when you press Shift+Alt
 629         case GDK_Meta_R:
 630             event_context->defaultMessageContext()->clear();
 631             break;
 632         default:
 633             break;
 634         }
 635         break;
 636     default:
 637         break;
 638     }
 639
 640     if (!ret) {
 641         if (((SPEventContextClass *) parent_class)->root_handler) {
 642             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 643         }
 644     }
 645
 646     return ret;
 647 }
 648
 649 static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
 650 {
 651     SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;
 652
 653     if (!bc.item) {
 654
 655         if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
 656             return;
 657         }
 658
 659         /* Create object */
 660         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
 661         Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
 662         repr->setAttribute("sodipodi:type", "inkscape:box3d");
 663
 664         /* Set style */
 665         sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);
 666
 667         bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
 668         Inkscape::GC::release(repr);
 669         /**** bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); ****/
 670         Inkscape::XML::Node *repr_side;
 671         // TODO: Incorporate this in box3d-side.cpp!
 672         for (int i = 0; i < 6; ++i) {
 673             repr_side = xml_doc->createElement("svg:path");
 674             repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
 675             repr->addChild(repr_side, NULL);
 676
 677             Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));
 678
 679             guint desc = Box3D::int_to_face(i);
 680
 681             Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
 682             plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
 683             side->dir1 = Box3D::extract_first_axis_direction(plane);
 684             side->dir2 = Box3D::extract_second_axis_direction(plane);
 685             side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
 686
 687             /* Set style */
 688             box3d_side_apply_style(side);
 689
 690             SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
 691         }
 692
 693         box3d_set_z_orders(SP_BOX3D(bc.item));
 694         bc.item->updateRepr();
 695
 696         // TODO: It would be nice to show the VPs during dragging, but since there is no selection
 697         //       at this point (only after finishing the box), we must do this "manually"
 698         /**** bc._vpdrag->updateDraggers(); ****/
 699
 700         sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
 701     }
 702
 703     g_assert(bc.item);
 704
 705     SPBox3D *box = SP_BOX3D(bc.item);
 706
 707     box->orig_corner0 = bc.drag_origin_proj;
 708     box->orig_corner7 = bc.drag_ptC_proj;
 709
 710     box3d_check_for_swapped_coords(box);
 711
 712     /* we need to call this from here (instead of from box3d_position_set(), for example)
 713        because z-order setting must not interfere with display updates during undo/redo */
 714     box3d_set_z_orders (box);
 715
 716     box3d_position_set(box);
 717
 718     // status text
 719     //GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());
 720     //GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());
 721     bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
 722     //g_string_free(Ax, FALSE);
 723     //g_string_free(Ay, FALSE);
 724 }
 725
 726 static void sp_box3d_finish(Box3DContext *bc)
 727 {
 728     bc->_message_context->clear();
 729     g_assert (SP_ACTIVE_DOCUMENT->current_persp3d);
 730     //Persp3D *cur_persp = SP_ACTIVE_DOCUMENT->current_persp3d;
 731
 732     if ( bc->item != NULL ) {
 733         SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);
 734
 735         SPBox3D *box = SP_BOX3D(bc->item);
 736
 737         box->orig_corner0 = bc->drag_origin_proj;
 738         box->orig_corner7 = bc->drag_ptC_proj;
 739
 740         box->updateRepr();
 741
 742         box3d_relabel_corners(box);
 743
 744         sp_canvas_end_forced_full_redraws(desktop->canvas);
 745
 746         sp_desktop_selection(desktop)->set(bc->item);
 747         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,
 748                          _("Create 3D box"));
 749
 750         bc->item = NULL;
 751     }
 752
 753     bc->ctrl_dragged = false;
 754     bc->extruded = false;
 755 }
 756
 757 /*
 758   Local Variables:
 759   mode:c++
 760   c-file-style:"stroustrup"
 761   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 762   indent-tabs-mode:nil
 763   fill-column:99
 764   End:
 765 */
 766 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :