1 #define __SP_DESKTOP_C__
3 /** \file
4 * Editable view implementation
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * MenTaLguY <mental@rydia.net>
9 * bulia byak <buliabyak@users.sf.net>
10 * Ralf Stephan <ralf@ark.in-berlin.de>
11 * John Bintz <jcoswell@coswellproductions.org>
12 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
13 *
14 * Copyright (C) 2007 Jon A. Cruz
15 * Copyright (C) 2006-2008 Johan Engelen
16 * Copyright (C) 2006 John Bintz
17 * Copyright (C) 2004 MenTaLguY
18 * Copyright (C) 1999-2002 Lauris Kaplinski
19 * Copyright (C) 2000-2001 Ximian, Inc.
20 *
21 * Released under GNU GPL, read the file 'COPYING' for more information
22 */
24 /** \class SPDesktop
25 * SPDesktop is a subclass of View, implementing an editable document
26 * canvas. It is extensively used by many UI controls that need certain
27 * visual representations of their own.
28 *
29 * SPDesktop provides a certain set of SPCanvasItems, serving as GUI
30 * layers of different control objects. The one containing the whole
31 * document is the drawing layer. In addition to it, there are grid,
32 * guide, sketch and control layers. The sketch layer is used for
33 * temporary drawing objects, before the real objects in document are
34 * created. The control layer contains editing knots, rubberband and
35 * similar non-document UI objects.
36 *
37 * Each SPDesktop is associated with a SPNamedView node of the document
38 * tree. Currently, all desktops are created from a single main named
39 * view, but in the future there may be support for different ones.
40 * SPNamedView serves as an in-document container for desktop-related
41 * data, like grid and guideline placement, snapping options and so on.
42 *
43 * Associated with each SPDesktop are the two most important editing
44 * related objects - SPSelection and SPEventContext.
45 *
46 * Sodipodi keeps track of the active desktop and invokes notification
47 * signals whenever it changes. UI elements can use these to update their
48 * display to the selection of the currently active editing window.
49 * (Lauris Kaplinski)
50 */
52 #ifdef HAVE_CONFIG_H
53 # include "config.h"
54 #endif
56 #include <glibmm/i18n.h>
57 #include <sigc++/functors/mem_fun.h>
58 #include <gtkmm.h>
60 #include <2geom/rect.h>
61 #include "macros.h"
62 #include "inkscape-private.h"
63 #include "desktop.h"
64 #include "desktop-events.h"
65 #include "desktop-handles.h"
66 #include "document.h"
67 #include "message-stack.h"
68 #include "selection.h"
69 #include "select-context.h"
70 #include "sp-namedview.h"
71 #include "color.h"
72 #include "sp-item-group.h"
73 #include "preferences.h"
74 #include "object-hierarchy.h"
75 #include "helper/units.h"
76 #include "display/canvas-arena.h"
77 #include "display/nr-arena.h"
78 #include "display/gnome-canvas-acetate.h"
79 #include "display/sodipodi-ctrlrect.h"
80 #include "display/sp-canvas-util.h"
81 #include "display/canvas-temporary-item-list.h"
82 #include "display/snap-indicator.h"
83 #include "ui/dialog/dialog-manager.h"
84 #include "xml/repr.h"
85 #include "message-context.h"
86 #include "device-manager.h"
87 #include "layer-fns.h"
88 #include "layer-manager.h"
89 #include "event-log.h"
90 #include "display/canvas-grid.h"
91 #include "widgets/desktop-widget.h"
92 #include "box3d-context.h"
94 #include "display/sp-canvas.h"
96 namespace Inkscape { namespace XML { class Node; }}
98 // Callback declarations
99 static void _onSelectionChanged (Inkscape::Selection *selection, SPDesktop *desktop);
100 static gint _arena_handler (SPCanvasArena *arena, NRArenaItem *ai, GdkEvent *event, SPDesktop *desktop);
101 static void _layer_activated(SPObject *layer, SPDesktop *desktop);
102 static void _layer_deactivated(SPObject *layer, SPDesktop *desktop);
103 static void _layer_hierarchy_changed(SPObject *top, SPObject *bottom, SPDesktop *desktop);
104 static void _reconstruction_start(SPDesktop * desktop);
105 static void _reconstruction_finish(SPDesktop * desktop);
106 static void _namedview_modified (SPObject *obj, guint flags, SPDesktop *desktop);
107 static void _update_snap_distances (SPDesktop *desktop);
109 /**
110 * Return new desktop object.
111 * \pre namedview != NULL.
112 * \pre canvas != NULL.
113 */
114 SPDesktop::SPDesktop() :
115 _dlg_mgr( 0 ),
116 namedview( 0 ),
117 canvas( 0 ),
118 selection( 0 ),
119 event_context( 0 ),
120 layer_manager( 0 ),
121 event_log( 0 ),
122 temporary_item_list( 0 ),
123 snapindicator( 0 ),
124 acetate( 0 ),
125 main( 0 ),
126 gridgroup( 0 ),
127 guides( 0 ),
128 drawing( 0 ),
129 sketch( 0 ),
130 controls( 0 ),
131 tempgroup ( 0 ),
132 table( 0 ),
133 page( 0 ),
134 page_border( 0 ),
135 current( 0 ),
136 _focusMode(false),
137 zooms_past( 0 ),
138 zooms_future( 0 ),
139 dkey( 0 ),
140 number( 0 ),
141 window_state(0),
142 interaction_disabled_counter( 0 ),
143 waiting_cursor( false ),
144 guides_active( false ),
145 gr_item( 0 ),
146 gr_point_type( 0 ),
147 gr_point_i( 0 ),
148 gr_fill_or_stroke( true ),
149 _layer_hierarchy( 0 ),
150 _reconstruction_old_layer_id( 0 ),
151 _display_mode(Inkscape::RENDERMODE_NORMAL),
152 _saved_display_mode(Inkscape::RENDERMODE_NORMAL),
153 _widget( 0 ),
154 _inkscape( 0 ),
155 _guides_message_context( 0 ),
156 _active( false ),
157 _w2d(),
158 _d2w(),
159 _doc2dt( Geom::Scale(1, -1) ),
160 grids_visible( false )
161 {
162 _d2w.setIdentity();
163 _w2d.setIdentity();
165 selection = Inkscape::GC::release( new Inkscape::Selection(this) );
166 }
168 void
169 SPDesktop::init (SPNamedView *nv, SPCanvas *aCanvas)
170 {
171 // Temporary workaround for link order issues:
172 Inkscape::DeviceManager::getManager().getDevices();
173 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
175 _guides_message_context = new Inkscape::MessageContext(const_cast<Inkscape::MessageStack*>(messageStack()));
177 current = prefs->getStyle("/desktop/style");
179 namedview = nv;
180 canvas = aCanvas;
182 SPDocument *document = SP_OBJECT_DOCUMENT (namedview);
183 /* Kill flicker */
184 sp_document_ensure_up_to_date (document);
186 /* Setup Dialog Manager */
187 _dlg_mgr = &Inkscape::UI::Dialog::DialogManager::getInstance();
189 dkey = sp_item_display_key_new (1);
191 /* Connect document */
192 setDocument (document);
194 number = namedview->getViewCount();
197 /* Setup Canvas */
198 g_object_set_data (G_OBJECT (canvas), "SPDesktop", this);
200 SPCanvasGroup *root = sp_canvas_root (canvas);
202 /* Setup adminstrative layers */
203 acetate = sp_canvas_item_new (root, GNOME_TYPE_CANVAS_ACETATE, NULL);
204 g_signal_connect (G_OBJECT (acetate), "event", G_CALLBACK (sp_desktop_root_handler), this);
205 main = (SPCanvasGroup *) sp_canvas_item_new (root, SP_TYPE_CANVAS_GROUP, NULL);
206 g_signal_connect (G_OBJECT (main), "event", G_CALLBACK (sp_desktop_root_handler), this);
208 table = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
209 SP_CTRLRECT(table)->setRectangle(Geom::Rect(Geom::Point(-80000, -80000), Geom::Point(80000, 80000)));
210 SP_CTRLRECT(table)->setColor(0x00000000, true, 0x00000000);
211 sp_canvas_item_move_to_z (table, 0);
213 page = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
214 ((CtrlRect *) page)->setColor(0x00000000, FALSE, 0x00000000);
215 page_border = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
217 drawing = sp_canvas_item_new (main, SP_TYPE_CANVAS_ARENA, NULL);
218 g_signal_connect (G_OBJECT (drawing), "arena_event", G_CALLBACK (_arena_handler), this);
220 SP_CANVAS_ARENA (drawing)->arena->delta = prefs->getDouble("/options/cursortolerance/value", 1.0); // default is 1 px
222 if (prefs->getBool("/options/startmode/outline")) {
223 // Start in outline mode
224 setDisplayModeOutline();
225 } else {
226 // Start in normal mode, default
227 setDisplayModeNormal();
228 }
230 gridgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
231 guides = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
232 sketch = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
233 controls = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
234 tempgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
236 /* Push select tool to the bottom of stack */
237 /** \todo
238 * FIXME: this is the only call to this. Everything else seems to just
239 * call "set" instead of "push". Can we assume that there is only one
240 * context ever?
241 */
242 push_event_context (SP_TYPE_SELECT_CONTEXT, "/tools/select", SP_EVENT_CONTEXT_STATIC);
244 // display rect and zoom are now handled in sp_desktop_widget_realize()
246 Geom::Rect const d(Geom::Point(0.0, 0.0),
247 Geom::Point(sp_document_width(document), sp_document_height(document)));
249 SP_CTRLRECT(page)->setRectangle(d);
250 SP_CTRLRECT(page_border)->setRectangle(d);
252 /* the following sets the page shadow on the canvas
253 It was originally set to 5, which is really cheesy!
254 It now is an attribute in the document's namedview. If a value of
255 0 is used, then the constructor for a shadow is not initialized.
256 */
258 if ( namedview->pageshadow != 0 && namedview->showpageshadow ) {
259 SP_CTRLRECT(page_border)->setShadow(namedview->pageshadow, 0x3f3f3fff);
260 }
263 /* Connect event for page resize */
264 _doc2dt[5] = sp_document_height (document);
265 sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (drawing), _doc2dt);
267 _modified_connection = namedview->connectModified(sigc::bind<2>(sigc::ptr_fun(&_namedview_modified), this));
269 NRArenaItem *ai = sp_item_invoke_show (SP_ITEM (sp_document_root (document)),
270 SP_CANVAS_ARENA (drawing)->arena,
271 dkey,
272 SP_ITEM_SHOW_DISPLAY);
273 if (ai) {
274 nr_arena_item_add_child (SP_CANVAS_ARENA (drawing)->root, ai, NULL);
275 }
277 namedview->show(this);
278 /* Ugly hack */
279 activate_guides (true);
280 /* Ugly hack */
281 _namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);
283 /* Set up notification of rebuilding the document, this allows
284 for saving object related settings in the document. */
285 _reconstruction_start_connection =
286 document->connectReconstructionStart(sigc::bind(sigc::ptr_fun(_reconstruction_start), this));
287 _reconstruction_finish_connection =
288 document->connectReconstructionFinish(sigc::bind(sigc::ptr_fun(_reconstruction_finish), this));
289 _reconstruction_old_layer_id = NULL;
291 // ?
292 // sp_active_desktop_set (desktop);
293 _inkscape = INKSCAPE;
295 _activate_connection = _activate_signal.connect(
296 sigc::bind(
297 sigc::ptr_fun(_onActivate),
298 this
299 )
300 );
301 _deactivate_connection = _deactivate_signal.connect(
302 sigc::bind(
303 sigc::ptr_fun(_onDeactivate),
304 this
305 )
306 );
308 _sel_modified_connection = selection->connectModified(
309 sigc::bind(
310 sigc::ptr_fun(&_onSelectionModified),
311 this
312 )
313 );
314 _sel_changed_connection = selection->connectChanged(
315 sigc::bind(
316 sigc::ptr_fun(&_onSelectionChanged),
317 this
318 )
319 );
322 /* setup LayerManager */
323 // (Setting up after the connections are all in place, as it may use some of them)
324 layer_manager = new Inkscape::LayerManager( this );
326 showGrids(namedview->grids_visible, false);
328 temporary_item_list = new Inkscape::Display::TemporaryItemList( this );
329 snapindicator = new Inkscape::Display::SnapIndicator ( this );
330 }
333 void SPDesktop::destroy()
334 {
335 if (snapindicator) {
336 delete snapindicator;
337 snapindicator = NULL;
338 }
339 if (temporary_item_list) {
340 delete temporary_item_list;
341 temporary_item_list = NULL;
342 }
344 if (selection) {
345 delete selection;
346 selection = NULL;
347 }
349 namedview->hide(this);
351 _activate_connection.disconnect();
352 _deactivate_connection.disconnect();
353 _sel_modified_connection.disconnect();
354 _sel_changed_connection.disconnect();
355 _modified_connection.disconnect();
356 _commit_connection.disconnect();
357 _reconstruction_start_connection.disconnect();
358 _reconstruction_finish_connection.disconnect();
360 g_signal_handlers_disconnect_by_func(G_OBJECT (acetate), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);
361 g_signal_handlers_disconnect_by_func(G_OBJECT (main), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);
362 g_signal_handlers_disconnect_by_func(G_OBJECT (drawing), (gpointer) G_CALLBACK(_arena_handler), this);
364 while (event_context) {
365 SPEventContext *ec = event_context;
366 event_context = ec->next;
367 sp_event_context_finish (ec);
368 g_object_unref (G_OBJECT (ec));
369 }
371 if (_layer_hierarchy) {
372 delete _layer_hierarchy;
373 // _layer_hierarchy = NULL; //this should be here, but commented to find other bug somewhere else.
374 }
376 if (layer_manager) {
377 delete layer_manager;
378 layer_manager = NULL;
379 }
381 if (_inkscape) {
382 _inkscape = NULL;
383 }
385 if (drawing) {
386 sp_item_invoke_hide (SP_ITEM (sp_document_root (doc())), dkey);
387 drawing = NULL;
388 }
390 delete _guides_message_context;
391 _guides_message_context = NULL;
393 g_list_free (zooms_past);
394 g_list_free (zooms_future);
395 }
397 SPDesktop::~SPDesktop() {}
399 //--------------------------------------------------------------------
400 /* Public methods */
403 /* These methods help for temporarily showing things on-canvas.
404 * The *only* valid use of the TemporaryItem* that you get from add_temporary_canvasitem
405 * is when you want to prematurely remove the item from the canvas, by calling
406 * desktop->remove_temporary_canvasitem(tempitem).
407 */
408 /** Note that lifetime is measured in milliseconds
409 * One should *not* keep a reference to the SPCanvasItem, the temporary item code will
410 * delete the object for you and the reference will become invalid without you knowing it.
411 * It is perfectly safe to ignore the returned pointer: the object is deleted by itself, so don't delete it elsewhere!
412 * The *only* valid use of the returned TemporaryItem* is as argument for SPDesktop::remove_temporary_canvasitem,
413 * because the object might be deleted already without you knowing it.
414 * move_to_bottom = true by default so the item does not interfere with handling of other items on the canvas like nodes.
415 */
416 Inkscape::Display::TemporaryItem *
417 SPDesktop::add_temporary_canvasitem (SPCanvasItem *item, guint lifetime, bool move_to_bottom)
418 {
419 if (move_to_bottom) {
420 sp_canvas_item_move_to_z(item, 0);
421 }
423 return temporary_item_list->add_item(item, lifetime);
424 }
426 /** It is perfectly safe to call this function while the object has already been deleted due to a timeout.
427 */
428 void
429 SPDesktop::remove_temporary_canvasitem (Inkscape::Display::TemporaryItem * tempitem)
430 {
431 // check for non-null temporary_item_list, because during destruction of desktop, some destructor might try to access this list!
432 if (tempitem && temporary_item_list) {
433 temporary_item_list->delete_item(tempitem);
434 }
435 }
437 void SPDesktop::_setDisplayMode(Inkscape::RenderMode mode) {
438 SP_CANVAS_ARENA (drawing)->arena->rendermode = mode;
439 canvas->rendermode = mode;
440 _display_mode = mode;
441 if (mode != Inkscape::RENDERMODE_OUTLINE) {
442 _saved_display_mode = _display_mode;
443 }
444 sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (main), _d2w); // redraw
445 _widget->setTitle(SP_DOCUMENT_NAME(sp_desktop_document(this)));
446 }
448 void SPDesktop::displayModeToggle() {
449 if (_display_mode == Inkscape::RENDERMODE_OUTLINE) {
450 _setDisplayMode(_saved_display_mode);
451 } else {
452 _setDisplayMode(Inkscape::RENDERMODE_OUTLINE);
453 }
454 }
456 /**
457 * Returns current root (=bottom) layer.
458 */
459 SPObject *SPDesktop::currentRoot() const
460 {
461 return _layer_hierarchy ? _layer_hierarchy->top() : NULL;
462 }
464 /**
465 * Returns current top layer.
466 */
467 SPObject *SPDesktop::currentLayer() const
468 {
469 return _layer_hierarchy ? _layer_hierarchy->bottom() : NULL;
470 }
472 /**
473 * Sets the current layer of the desktop.
474 *
475 * Make \a object the top layer.
476 */
477 void SPDesktop::setCurrentLayer(SPObject *object) {
478 g_return_if_fail(SP_IS_GROUP(object));
479 g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );
480 // printf("Set Layer to ID: %s\n", SP_OBJECT_ID(object));
481 _layer_hierarchy->setBottom(object);
482 }
484 void SPDesktop::toggleLayerSolo(SPObject *object) {
485 g_return_if_fail(SP_IS_GROUP(object));
486 g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );
488 bool othersShowing = false;
489 std::vector<SPObject*> layers;
490 for ( SPObject* obj = Inkscape::next_layer(currentRoot(), object); obj; obj = Inkscape::next_layer(currentRoot(), obj) ) {
491 layers.push_back(obj);
492 othersShowing |= !SP_ITEM(obj)->isHidden();
493 }
494 for ( SPObject* obj = Inkscape::previous_layer(currentRoot(), object); obj; obj = Inkscape::previous_layer(currentRoot(), obj) ) {
495 layers.push_back(obj);
496 othersShowing |= !SP_ITEM(obj)->isHidden();
497 }
500 if ( SP_ITEM(object)->isHidden() ) {
501 SP_ITEM(object)->setHidden(false);
502 }
504 for ( std::vector<SPObject*>::iterator it = layers.begin(); it != layers.end(); ++it ) {
505 SP_ITEM(*it)->setHidden(othersShowing);
506 }
507 }
509 /**
510 * Return layer that contains \a object.
511 */
512 SPObject *SPDesktop::layerForObject(SPObject *object) {
513 g_return_val_if_fail(object != NULL, NULL);
515 SPObject *root=currentRoot();
516 object = SP_OBJECT_PARENT(object);
517 while ( object && object != root && !isLayer(object) ) {
518 object = SP_OBJECT_PARENT(object);
519 }
520 return object;
521 }
523 /**
524 * True if object is a layer.
525 */
526 bool SPDesktop::isLayer(SPObject *object) const {
527 return ( SP_IS_GROUP(object)
528 && ( SP_GROUP(object)->effectiveLayerMode(this->dkey)
529 == SPGroup::LAYER ) );
530 }
532 /**
533 * True if desktop viewport fully contains \a item's bbox.
534 */
535 bool SPDesktop::isWithinViewport (SPItem *item) const
536 {
537 Geom::Rect const viewport = get_display_area();
538 Geom::OptRect const bbox = sp_item_bbox_desktop(item);
539 if (bbox) {
540 return viewport.contains(*bbox);
541 } else {
542 return true;
543 }
544 }
546 ///
547 bool SPDesktop::itemIsHidden(SPItem const *item) const {
548 return item->isHidden(this->dkey);
549 }
551 /**
552 * Set activate property of desktop; emit signal if changed.
553 */
554 void
555 SPDesktop::set_active (bool new_active)
556 {
557 if (new_active != _active) {
558 _active = new_active;
559 if (new_active) {
560 _activate_signal.emit();
561 } else {
562 _deactivate_signal.emit();
563 }
564 }
565 }
567 /**
568 * Set activate status of current desktop's named view.
569 */
570 void
571 SPDesktop::activate_guides(bool activate)
572 {
573 guides_active = activate;
574 namedview->activateGuides(this, activate);
575 }
577 /**
578 * Make desktop switch documents.
579 */
580 void
581 SPDesktop::change_document (SPDocument *theDocument)
582 {
583 g_return_if_fail (theDocument != NULL);
585 /* unselect everything before switching documents */
586 selection->clear();
588 setDocument (theDocument);
590 /* update the rulers, connect the desktop widget's signal to the new namedview etc.
591 (this can probably be done in a better way) */
592 Gtk::Window *parent = this->getToplevel();
593 g_assert(parent != NULL);
594 SPDesktopWidget *dtw = (SPDesktopWidget *) parent->get_data("desktopwidget");
595 if (dtw) dtw->desktop = this;
596 sp_desktop_widget_update_namedview(dtw);
598 _namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);
599 _document_replaced_signal.emit (this, theDocument);
600 }
602 /**
603 * Make desktop switch event contexts.
604 */
605 void
606 SPDesktop::set_event_context (GtkType type, const gchar *config)
607 {
608 SPEventContext *ec;
609 while (event_context) {
610 ec = event_context;
611 sp_event_context_deactivate (ec);
612 event_context = ec->next;
613 sp_event_context_finish (ec);
614 g_object_unref (G_OBJECT (ec));
615 }
617 ec = sp_event_context_new (type, this, config, SP_EVENT_CONTEXT_STATIC);
618 ec->next = event_context;
619 event_context = ec;
620 sp_event_context_activate (ec);
621 _event_context_changed_signal.emit (this, ec);
622 }
624 /**
625 * Push event context onto desktop's context stack.
626 */
627 void
628 SPDesktop::push_event_context (GtkType type, const gchar *config, unsigned int key)
629 {
630 SPEventContext *ref, *ec;
632 if (event_context && event_context->key == key) return;
633 ref = event_context;
634 while (ref && ref->next && ref->next->key != key) ref = ref->next;
635 if (ref && ref->next) {
636 ec = ref->next;
637 ref->next = ec->next;
638 sp_event_context_finish (ec);
639 g_object_unref (G_OBJECT (ec));
640 }
642 if (event_context) sp_event_context_deactivate (event_context);
643 ec = sp_event_context_new (type, this, config, key);
644 ec->next = event_context;
645 event_context = ec;
646 sp_event_context_activate (ec);
647 _event_context_changed_signal.emit (this, ec);
648 }
650 /**
651 * Sets the coordinate status to a given point
652 */
653 void
654 SPDesktop::set_coordinate_status (Geom::Point p) {
655 _widget->setCoordinateStatus(p);
656 }
658 /**
659 * \see sp_document_item_from_list_at_point_bottom()
660 */
661 SPItem *
662 SPDesktop::item_from_list_at_point_bottom (const GSList *list, Geom::Point const p) const
663 {
664 g_return_val_if_fail (doc() != NULL, NULL);
665 return sp_document_item_from_list_at_point_bottom (dkey, SP_GROUP (doc()->root), list, p);
666 }
668 /**
669 * \see sp_document_item_at_point()
670 */
671 SPItem *
672 SPDesktop::item_at_point (Geom::Point const p, bool into_groups, SPItem *upto) const
673 {
674 g_return_val_if_fail (doc() != NULL, NULL);
675 return sp_document_item_at_point (doc(), dkey, p, into_groups, upto);
676 }
678 /**
679 * \see sp_document_group_at_point()
680 */
681 SPItem *
682 SPDesktop::group_at_point (Geom::Point const p) const
683 {
684 g_return_val_if_fail (doc() != NULL, NULL);
685 return sp_document_group_at_point (doc(), dkey, p);
686 }
688 /**
689 * \brief Returns the mouse point in document coordinates; if mouse is
690 * outside the canvas, returns the center of canvas viewpoint
691 */
692 Geom::Point
693 SPDesktop::point() const
694 {
695 Geom::Point p = _widget->getPointer();
696 Geom::Point pw = sp_canvas_window_to_world (canvas, p);
697 p = w2d(pw);
699 Geom::Rect const r = canvas->getViewbox();
701 Geom::Point r0 = w2d(r.min());
702 Geom::Point r1 = w2d(r.max());
704 if (p[Geom::X] >= r0[Geom::X] &&
705 p[Geom::X] <= r1[Geom::X] &&
706 p[Geom::Y] >= r1[Geom::Y] &&
707 p[Geom::Y] <= r0[Geom::Y])
708 {
709 return p;
710 } else {
711 return (r0 + r1) / 2;
712 }
713 }
715 /**
716 * Put current zoom data in history list.
717 */
718 void
719 SPDesktop::push_current_zoom (GList **history)
720 {
721 Geom::Rect const area = get_display_area();
723 NRRect *old_zoom = g_new(NRRect, 1);
724 old_zoom->x0 = area.min()[Geom::X];
725 old_zoom->x1 = area.max()[Geom::X];
726 old_zoom->y0 = area.min()[Geom::Y];
727 old_zoom->y1 = area.max()[Geom::Y];
728 if ( *history == NULL
729 || !( ( ((NRRect *) ((*history)->data))->x0 == old_zoom->x0 ) &&
730 ( ((NRRect *) ((*history)->data))->x1 == old_zoom->x1 ) &&
731 ( ((NRRect *) ((*history)->data))->y0 == old_zoom->y0 ) &&
732 ( ((NRRect *) ((*history)->data))->y1 == old_zoom->y1 ) ) )
733 {
734 *history = g_list_prepend (*history, old_zoom);
735 }
736 }
738 /**
739 * Set viewbox (x0, x1, y0 and y1 are in document pixels. Border is in screen pixels).
740 */
741 void
742 SPDesktop::set_display_area (double x0, double y0, double x1, double y1, double border, bool log)
743 {
744 g_assert(_widget);
746 // save the zoom
747 if (log) {
748 push_current_zoom(&zooms_past);
749 // if we do a logged zoom, our zoom-forward list is invalidated, so delete it
750 g_list_free (zooms_future);
751 zooms_future = NULL;
752 }
754 double const cx = 0.5 * (x0 + x1);
755 double const cy = 0.5 * (y0 + y1);
757 // FIXME: This 2geom idiom doesn't allow us to declare dbox const
758 Geom::Rect viewbox = canvas->getViewbox();
759 viewbox.expandBy(-border);
761 double scale = _d2w.descrim();
762 double newscale;
763 if (((x1 - x0) * viewbox.dimensions()[Geom::Y]) > ((y1 - y0) * viewbox.dimensions()[Geom::X])) {
764 newscale = viewbox.dimensions()[Geom::X] / (x1 - x0);
765 } else {
766 newscale = viewbox.dimensions()[Geom::Y] / (y1 - y0);
767 }
769 newscale = CLAMP(newscale, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX); // unit: 'screen pixels' per 'document pixels'
771 int clear = FALSE;
772 if (!NR_DF_TEST_CLOSE (newscale, scale, 1e-4 * scale)) {
773 /* Set zoom factors */
774 _d2w = Geom::Scale(newscale, -newscale);
775 _w2d = Geom::Scale(1/newscale, 1/-newscale);
776 sp_canvas_item_affine_absolute(SP_CANVAS_ITEM(main), _d2w);
777 clear = TRUE;
778 }
780 /* Calculate top left corner (in document pixels) */
781 x0 = cx - 0.5 * viewbox.dimensions()[Geom::X] / newscale;
782 y1 = cy + 0.5 * viewbox.dimensions()[Geom::Y] / newscale;
784 /* Scroll */
785 sp_canvas_scroll_to (canvas, x0 * newscale - border, y1 * -newscale - border, clear);
787 /* update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
788 sp_box3d_context_update_lines(event_context);
790 _widget->updateRulers();
791 _widget->updateScrollbars(_d2w.descrim());
792 _widget->updateZoom();
793 }
795 void SPDesktop::set_display_area(Geom::Rect const &a, Geom::Coord b, bool log)
796 {
797 set_display_area(a.min()[Geom::X], a.min()[Geom::Y], a.max()[Geom::X], a.max()[Geom::Y], b, log);
798 }
800 /**
801 * Return viewbox dimensions.
802 */
803 Geom::Rect SPDesktop::get_display_area() const
804 {
805 Geom::Rect const viewbox = canvas->getViewbox();
807 double const scale = _d2w[0];
809 return Geom::Rect(Geom::Point(viewbox.min()[Geom::X] / scale, viewbox.max()[Geom::Y] / -scale),
810 Geom::Point(viewbox.max()[Geom::X] / scale, viewbox.min()[Geom::Y] / -scale));
811 }
813 /**
814 * Revert back to previous zoom if possible.
815 */
816 void
817 SPDesktop::prev_zoom()
818 {
819 if (zooms_past == NULL) {
820 messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No previous zoom."));
821 return;
822 }
824 // push current zoom into forward zooms list
825 push_current_zoom (&zooms_future);
827 // restore previous zoom
828 set_display_area (((NRRect *) zooms_past->data)->x0,
829 ((NRRect *) zooms_past->data)->y0,
830 ((NRRect *) zooms_past->data)->x1,
831 ((NRRect *) zooms_past->data)->y1,
832 0, false);
834 // remove the just-added zoom from the past zooms list
835 zooms_past = g_list_remove (zooms_past, ((NRRect *) zooms_past->data));
836 }
838 /**
839 * Set zoom to next in list.
840 */
841 void
842 SPDesktop::next_zoom()
843 {
844 if (zooms_future == NULL) {
845 this->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No next zoom."));
846 return;
847 }
849 // push current zoom into past zooms list
850 push_current_zoom (&zooms_past);
852 // restore next zoom
853 set_display_area (((NRRect *) zooms_future->data)->x0,
854 ((NRRect *) zooms_future->data)->y0,
855 ((NRRect *) zooms_future->data)->x1,
856 ((NRRect *) zooms_future->data)->y1,
857 0, false);
859 // remove the just-used zoom from the zooms_future list
860 zooms_future = g_list_remove (zooms_future, ((NRRect *) zooms_future->data));
861 }
863 #include "tools-switch.h"
864 #include "node-context.h"
865 #include "shape-editor.h"
866 #include "nodepath.h"
868 /** \brief Performs a quick zoom into what the user is working on
869 \param enable Whether we're going in or out of quick zoom
871 */
872 void
873 SPDesktop::zoom_quick (bool enable)
874 {
875 if (enable == _quick_zoom_enabled) {
876 return;
877 }
879 if (enable == true) {
880 _quick_zoom_stored_area = get_display_area();
881 bool zoomed = false;
883 if (!zoomed) {
884 SPItem * singleItem = selection->singleItem();
885 if (singleItem != NULL && tools_isactive(this, TOOLS_NODES)) {
886 SPNodeContext * ncontext = SP_NODE_CONTEXT(event_context);
888 Inkscape::NodePath::Path * nodepath = ncontext->shape_editor->get_nodepath();
889 // printf("I've got a nodepath, crazy\n");
891 Geom::Rect nodes;
892 bool firstnode = true;
894 if (nodepath->selected) {
895 for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
896 Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
897 for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
898 Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
899 if (node->selected) {
900 // printf("\tSelected node\n");
901 if (firstnode) {
902 nodes = Geom::Rect(node->pos, node->pos);
903 firstnode = false;
904 } else {
905 nodes.expandTo(node->pos);
906 }
908 if (node->p.other != NULL) {
909 /* Include previous node pos */
910 nodes.expandTo(node->p.other->pos);
912 /* Include previous handle */
913 if (!sp_node_side_is_line(node, &node->p)) {
914 nodes.expandTo(node->p.pos);
915 }
916 }
918 if (node->n.other != NULL) {
919 /* Include previous node pos */
920 nodes.expandTo(node->n.other->pos);
922 /* Include previous handle */
923 if (!sp_node_side_is_line(node, &node->n)) {
924 nodes.expandTo(node->n.pos);
925 }
926 }
927 }
928 }
929 }
931 if (!firstnode && nodes.area() * 2.0 < _quick_zoom_stored_area.area()) {
932 set_display_area(nodes, 10);
933 zoomed = true;
934 }
935 }
936 }
937 }
939 if (!zoomed) {
940 Geom::OptRect const d = selection->bounds();
941 if (d && d->area() * 2.0 < _quick_zoom_stored_area.area()) {
942 set_display_area(*d, 10);
943 zoomed = true;
944 }
945 }
947 if (!zoomed) {
948 zoom_relative(_quick_zoom_stored_area.midpoint()[Geom::X], _quick_zoom_stored_area.midpoint()[Geom::Y], 2.0);
949 zoomed = true;
950 }
951 } else {
952 set_display_area(_quick_zoom_stored_area, 0);
953 }
955 _quick_zoom_enabled = enable;
956 return;
957 }
959 /**
960 * Zoom to point with absolute zoom factor.
961 */
962 void
963 SPDesktop::zoom_absolute_keep_point (double cx, double cy, double px, double py, double zoom)
964 {
965 zoom = CLAMP (zoom, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX);
967 // maximum or minimum zoom reached, but there's no exact equality because of rounding errors;
968 // this check prevents "sliding" when trying to zoom in at maximum zoom;
969 /// \todo someone please fix calculations properly and remove this hack
970 if (fabs(_d2w.descrim() - zoom) < 0.0001*zoom && (fabs(SP_DESKTOP_ZOOM_MAX - zoom) < 0.01 || fabs(SP_DESKTOP_ZOOM_MIN - zoom) < 0.000001))
971 return;
973 Geom::Rect const viewbox = canvas->getViewbox();
975 double const width2 = viewbox.dimensions()[Geom::X] / zoom;
976 double const height2 = viewbox.dimensions()[Geom::Y] / zoom;
978 set_display_area(cx - px * width2,
979 cy - py * height2,
980 cx + (1 - px) * width2,
981 cy + (1 - py) * height2,
982 0.0);
983 }
985 /**
986 * Zoom to center with absolute zoom factor.
987 */
988 void
989 SPDesktop::zoom_absolute (double cx, double cy, double zoom)
990 {
991 zoom_absolute_keep_point (cx, cy, 0.5, 0.5, zoom);
992 }
994 /**
995 * Zoom to point with relative zoom factor.
996 */
997 void
998 SPDesktop::zoom_relative_keep_point (double cx, double cy, double zoom)
999 {
1000 Geom::Rect const area = get_display_area();
1002 if (cx < area.min()[Geom::X]) {
1003 cx = area.min()[Geom::X];
1004 }
1005 if (cx > area.max()[Geom::X]) {
1006 cx = area.max()[Geom::X];
1007 }
1008 if (cy < area.min()[Geom::Y]) {
1009 cy = area.min()[Geom::Y];
1010 }
1011 if (cy > area.max()[Geom::Y]) {
1012 cy = area.max()[Geom::Y];
1013 }
1015 gdouble const scale = _d2w.descrim() * zoom;
1016 double const px = (cx - area.min()[Geom::X]) / area.dimensions()[Geom::X];
1017 double const py = (cy - area.min()[Geom::Y]) / area.dimensions()[Geom::Y];
1019 zoom_absolute_keep_point(cx, cy, px, py, scale);
1020 }
1022 /**
1023 * Zoom to center with relative zoom factor.
1024 */
1025 void
1026 SPDesktop::zoom_relative (double cx, double cy, double zoom)
1027 {
1028 gdouble scale = _d2w.descrim() * zoom;
1029 zoom_absolute (cx, cy, scale);
1030 }
1032 /**
1033 * Set display area to origin and current document dimensions.
1034 */
1035 void
1036 SPDesktop::zoom_page()
1037 {
1038 Geom::Rect d(Geom::Point(0, 0),
1039 Geom::Point(sp_document_width(doc()), sp_document_height(doc())));
1041 if (d.minExtent() < 1.0) {
1042 return;
1043 }
1045 set_display_area(d, 10);
1046 }
1048 /**
1049 * Set display area to current document width.
1050 */
1051 void
1052 SPDesktop::zoom_page_width()
1053 {
1054 Geom::Rect const a = get_display_area();
1056 if (sp_document_width(doc()) < 1.0) {
1057 return;
1058 }
1060 Geom::Rect d(Geom::Point(0, a.midpoint()[Geom::Y]),
1061 Geom::Point(sp_document_width(doc()), a.midpoint()[Geom::Y]));
1063 set_display_area(d, 10);
1064 }
1066 /**
1067 * Zoom to selection.
1068 */
1069 void
1070 SPDesktop::zoom_selection()
1071 {
1072 Geom::OptRect const d = selection->bounds();
1074 if ( !d || d->minExtent() < 0.1 ) {
1075 return;
1076 }
1078 set_display_area(*d, 10);
1079 }
1081 /**
1082 * Tell widget to let zoom widget grab keyboard focus.
1083 */
1084 void
1085 SPDesktop::zoom_grab_focus()
1086 {
1087 _widget->letZoomGrabFocus();
1088 }
1090 /**
1091 * Zoom to whole drawing.
1092 */
1093 void
1094 SPDesktop::zoom_drawing()
1095 {
1096 g_return_if_fail (doc() != NULL);
1097 SPItem *docitem = SP_ITEM (sp_document_root (doc()));
1098 g_return_if_fail (docitem != NULL);
1100 Geom::OptRect d = sp_item_bbox_desktop(docitem);
1102 /* Note that the second condition here indicates that
1103 ** there are no items in the drawing.
1104 */
1105 if ( !d || d->minExtent() < 0.1 ) {
1106 return;
1107 }
1109 set_display_area(*d, 10);
1110 }
1112 /**
1113 * Scroll canvas by specific coordinate amount in svg coordinates.
1114 */
1115 void
1116 SPDesktop::scroll_world_in_svg_coords (double dx, double dy, bool is_scrolling)
1117 {
1118 double scale = _d2w.descrim();
1119 scroll_world(dx*scale, dy*scale, is_scrolling);
1120 }
1122 /**
1123 * Scroll canvas by specific coordinate amount.
1124 */
1125 void
1126 SPDesktop::scroll_world (double dx, double dy, bool is_scrolling)
1127 {
1128 g_assert(_widget);
1130 Geom::Rect const viewbox = canvas->getViewbox();
1132 sp_canvas_scroll_to(canvas, viewbox.min()[Geom::X] - dx, viewbox.min()[Geom::Y] - dy, FALSE, is_scrolling);
1134 /* update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
1135 sp_box3d_context_update_lines(event_context);
1137 _widget->updateRulers();
1138 _widget->updateScrollbars(_d2w.descrim());
1139 }
1141 bool
1142 SPDesktop::scroll_to_point (Geom::Point const &p, gdouble autoscrollspeed)
1143 {
1144 using Geom::X;
1145 using Geom::Y;
1147 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1148 gdouble autoscrolldistance = (gdouble) prefs->getIntLimited("/options/autoscrolldistance/value", 0, -1000, 10000);
1150 // autoscrolldistance is in screen pixels, but the display area is in document units
1151 autoscrolldistance /= _d2w.descrim();
1152 // FIXME: This 2geom idiom doesn't allow us to declare dbox const
1153 Geom::Rect dbox = get_display_area();
1154 dbox.expandBy(-autoscrolldistance);
1156 if (!(p[X] > dbox.min()[X] && p[X] < dbox.max()[X]) ||
1157 !(p[Y] > dbox.min()[Y] && p[Y] < dbox.max()[Y]) ) {
1159 Geom::Point const s_w( p * (Geom::Matrix)_d2w );
1161 gdouble x_to;
1162 if (p[X] < dbox.min()[X])
1163 x_to = dbox.min()[X];
1164 else if (p[X] > dbox.max()[X])
1165 x_to = dbox.max()[X];
1166 else
1167 x_to = p[X];
1169 gdouble y_to;
1170 if (p[Y] < dbox.min()[Y])
1171 y_to = dbox.min()[Y];
1172 else if (p[Y] > dbox.max()[Y])
1173 y_to = dbox.max()[Y];
1174 else
1175 y_to = p[Y];
1177 Geom::Point const d_dt(x_to, y_to);
1178 Geom::Point const d_w( d_dt * _d2w );
1179 Geom::Point const moved_w( d_w - s_w );
1181 if (autoscrollspeed == 0)
1182 autoscrollspeed = prefs->getDoubleLimited("/options/autoscrollspeed/value", 1, 0, 10);
1184 if (autoscrollspeed != 0)
1185 scroll_world (autoscrollspeed * moved_w);
1187 return true;
1188 }
1189 return false;
1190 }
1192 bool
1193 SPDesktop::is_iconified()
1194 {
1195 return 0!=(window_state & GDK_WINDOW_STATE_ICONIFIED);
1196 }
1198 void
1199 SPDesktop::iconify()
1200 {
1201 _widget->setIconified();
1202 }
1204 bool
1205 SPDesktop::is_maximized()
1206 {
1207 return 0!=(window_state & GDK_WINDOW_STATE_MAXIMIZED);
1208 }
1210 void
1211 SPDesktop::maximize()
1212 {
1213 _widget->setMaximized();
1214 }
1216 bool
1217 SPDesktop::is_fullscreen()
1218 {
1219 return 0!=(window_state & GDK_WINDOW_STATE_FULLSCREEN);
1220 }
1222 void
1223 SPDesktop::fullscreen()
1224 {
1225 _widget->setFullscreen();
1226 }
1228 /** \brief Checks to see if the user is working in focused mode
1230 Returns the value of \c _focusMode
1231 */
1232 bool
1233 SPDesktop::is_focusMode()
1234 {
1235 return _focusMode;
1236 }
1238 /** \brief Changes whether the user is in focus mode or not
1239 \param mode Which mode the view should be in
1241 */
1242 void
1243 SPDesktop::focusMode (bool mode)
1244 {
1245 if (mode == _focusMode) { return; }
1247 _focusMode = mode;
1249 layoutWidget();
1250 //sp_desktop_widget_layout(SPDesktopWidget);
1252 return;
1253 }
1255 void
1256 SPDesktop::getWindowGeometry (gint &x, gint &y, gint &w, gint &h)
1257 {
1258 _widget->getGeometry (x, y, w, h);
1259 }
1261 void
1262 SPDesktop::setWindowPosition (Geom::Point p)
1263 {
1264 _widget->setPosition (p);
1265 }
1267 void
1268 SPDesktop::setWindowSize (gint w, gint h)
1269 {
1270 _widget->setSize (w, h);
1271 }
1273 void
1274 SPDesktop::setWindowTransient (void *p, int transient_policy)
1275 {
1276 _widget->setTransient (p, transient_policy);
1277 }
1279 Gtk::Window*
1280 SPDesktop::getToplevel( )
1281 {
1282 return _widget->getWindow();
1283 }
1285 void
1286 SPDesktop::presentWindow()
1287 {
1288 _widget->present();
1289 }
1291 bool
1292 SPDesktop::warnDialog (gchar *text)
1293 {
1294 return _widget->warnDialog (text);
1295 }
1297 void
1298 SPDesktop::toggleRulers()
1299 {
1300 _widget->toggleRulers();
1301 }
1303 void
1304 SPDesktop::toggleScrollbars()
1305 {
1306 _widget->toggleScrollbars();
1307 }
1309 void
1310 SPDesktop::layoutWidget()
1311 {
1312 _widget->layout();
1313 }
1315 void
1316 SPDesktop::destroyWidget()
1317 {
1318 _widget->destroy();
1319 }
1321 bool
1322 SPDesktop::shutdown()
1323 {
1324 return _widget->shutdown();
1325 }
1327 bool SPDesktop::onDeleteUI (GdkEventAny*)
1328 {
1329 if(shutdown())
1330 return true;
1332 destroyWidget();
1333 return false;
1334 }
1336 /**
1337 * onWindowStateEvent
1338 *
1339 * Called when the window changes its maximize/fullscreen/iconify/pinned state.
1340 * Since GTK doesn't have a way to query this state information directly, we
1341 * record it for the desktop here, and also possibly trigger a layout.
1342 */
1343 bool
1344 SPDesktop::onWindowStateEvent (GdkEventWindowState* event)
1345 {
1346 // Record the desktop window's state
1347 window_state = event->new_window_state;
1349 // Layout may differ depending on full-screen mode or not
1350 GdkWindowState changed = event->changed_mask;
1351 if (changed & (GDK_WINDOW_STATE_FULLSCREEN|GDK_WINDOW_STATE_MAXIMIZED)) {
1352 layoutWidget();
1353 }
1355 return false;
1356 }
1358 void
1359 SPDesktop::setToolboxFocusTo (gchar const *label)
1360 {
1361 _widget->setToolboxFocusTo (label);
1362 }
1364 void
1365 SPDesktop::setToolboxAdjustmentValue (gchar const* id, double val)
1366 {
1367 _widget->setToolboxAdjustmentValue (id, val);
1368 }
1370 void
1371 SPDesktop::setToolboxSelectOneValue (gchar const* id, gint val)
1372 {
1373 _widget->setToolboxSelectOneValue (id, val);
1374 }
1376 bool
1377 SPDesktop::isToolboxButtonActive (gchar const *id)
1378 {
1379 return _widget->isToolboxButtonActive (id);
1380 }
1382 void
1383 SPDesktop::emitToolSubselectionChanged(gpointer data)
1384 {
1385 _tool_subselection_changed.emit(data);
1386 inkscape_subselection_changed (this);
1387 }
1389 void
1390 SPDesktop::updateNow()
1391 {
1392 sp_canvas_update_now(canvas);
1393 }
1395 void
1396 SPDesktop::enableInteraction()
1397 {
1398 _widget->enableInteraction();
1399 }
1401 void SPDesktop::disableInteraction()
1402 {
1403 _widget->disableInteraction();
1404 }
1406 void SPDesktop::setWaitingCursor()
1407 {
1408 GdkCursor *waiting = gdk_cursor_new(GDK_WATCH);
1409 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(this))->window, waiting);
1410 gdk_cursor_unref(waiting);
1411 // GDK needs the flush for the cursor change to take effect
1412 gdk_flush();
1413 waiting_cursor = true;
1414 }
1416 void SPDesktop::clearWaitingCursor()
1417 {
1418 if (waiting_cursor)
1419 sp_event_context_update_cursor(sp_desktop_event_context(this));
1420 }
1422 void SPDesktop::toggleColorProfAdjust()
1423 {
1424 _widget->toggleColorProfAdjust();
1425 }
1427 void SPDesktop::toggleGrids()
1428 {
1429 if (namedview->grids) {
1430 if(gridgroup) {
1431 showGrids(!grids_visible);
1432 }
1433 } else {
1434 //there is no grid present at the moment. add a rectangular grid and make it visible
1435 Inkscape::XML::Node *repr = SP_OBJECT_REPR(namedview);
1436 Inkscape::CanvasGrid::writeNewGridToRepr(repr, sp_desktop_document(this), Inkscape::GRID_RECTANGULAR);
1437 showGrids(true);
1438 }
1439 }
1441 void SPDesktop::showGrids(bool show, bool dirty_document)
1442 {
1443 grids_visible = show;
1444 sp_namedview_show_grids(namedview, grids_visible, dirty_document);
1445 if (show) {
1446 sp_canvas_item_show(SP_CANVAS_ITEM(gridgroup));
1447 } else {
1448 sp_canvas_item_hide(SP_CANVAS_ITEM(gridgroup));
1449 }
1450 }
1452 void SPDesktop::toggleSnapping()
1453 {
1454 bool v = namedview->snap_manager.snapprefs.getSnapEnabledGlobally();
1455 Inkscape::XML::Node *repr = SP_OBJECT_REPR(namedview);
1456 sp_repr_set_boolean(repr, "inkscape:snap-global", !v);
1457 }
1459 //----------------------------------------------------------------------
1460 // Callback implementations. The virtual ones are connected by the view.
1462 void
1463 SPDesktop::onPositionSet (double x, double y)
1464 {
1465 _widget->viewSetPosition (Geom::Point(x,y));
1466 }
1468 void
1469 SPDesktop::onResized (double /*x*/, double /*y*/)
1470 {
1471 // Nothing called here
1472 }
1474 /**
1475 * Redraw callback; queues Gtk redraw; connected by View.
1476 */
1477 void
1478 SPDesktop::onRedrawRequested ()
1479 {
1480 if (main) {
1481 _widget->requestCanvasUpdate();
1482 }
1483 }
1485 void
1486 SPDesktop::updateCanvasNow()
1487 {
1488 _widget->requestCanvasUpdateAndWait();
1489 }
1491 /**
1492 * Associate document with desktop.
1493 */
1494 void
1495 SPDesktop::setDocument (SPDocument *doc)
1496 {
1497 if (this->doc() && doc) {
1498 namedview->hide(this);
1499 sp_item_invoke_hide (SP_ITEM (sp_document_root (this->doc())), dkey);
1500 }
1502 if (_layer_hierarchy) {
1503 _layer_hierarchy->clear();
1504 delete _layer_hierarchy;
1505 }
1506 _layer_hierarchy = new Inkscape::ObjectHierarchy(NULL);
1507 _layer_hierarchy->connectAdded(sigc::bind(sigc::ptr_fun(_layer_activated), this));
1508 _layer_hierarchy->connectRemoved(sigc::bind(sigc::ptr_fun(_layer_deactivated), this));
1509 _layer_hierarchy->connectChanged(sigc::bind(sigc::ptr_fun(_layer_hierarchy_changed), this));
1510 _layer_hierarchy->setTop(SP_DOCUMENT_ROOT(doc));
1512 /* setup EventLog */
1513 event_log = new Inkscape::EventLog(doc);
1514 doc->addUndoObserver(*event_log);
1516 _commit_connection.disconnect();
1517 _commit_connection = doc->connectCommit(sigc::mem_fun(*this, &SPDesktop::updateNow));
1519 /// \todo fixme: This condition exists to make sure the code
1520 /// inside is NOT called on initialization, only on replacement. But there
1521 /// are surely more safe methods to accomplish this.
1522 // TODO since the comment had reversed logic, check the intent of this block of code:
1523 if (drawing) {
1524 NRArenaItem *ai = 0;
1526 namedview = sp_document_namedview (doc, NULL);
1527 _modified_connection = namedview->connectModified(sigc::bind<2>(sigc::ptr_fun(&_namedview_modified), this));
1528 number = namedview->getViewCount();
1530 ai = sp_item_invoke_show (SP_ITEM (sp_document_root (doc)),
1531 SP_CANVAS_ARENA (drawing)->arena,
1532 dkey,
1533 SP_ITEM_SHOW_DISPLAY);
1534 if (ai) {
1535 nr_arena_item_add_child (SP_CANVAS_ARENA (drawing)->root, ai, NULL);
1536 }
1537 namedview->show(this);
1538 /* Ugly hack */
1539 activate_guides (true);
1540 /* Ugly hack */
1541 _namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);
1542 }
1544 _document_replaced_signal.emit (this, doc);
1546 View::setDocument (doc);
1547 }
1549 void
1550 SPDesktop::onStatusMessage
1551 (Inkscape::MessageType type, gchar const *message)
1552 {
1553 if (_widget) {
1554 _widget->setMessage(type, message);
1555 }
1556 }
1558 void
1559 SPDesktop::onDocumentURISet (gchar const* uri)
1560 {
1561 _widget->setTitle(uri);
1562 }
1564 /**
1565 * Resized callback.
1566 */
1567 void
1568 SPDesktop::onDocumentResized (gdouble width, gdouble height)
1569 {
1570 _doc2dt[5] = height;
1571 sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (drawing), _doc2dt);
1572 Geom::Rect const a(Geom::Point(0, 0), Geom::Point(width, height));
1573 SP_CTRLRECT(page)->setRectangle(a);
1574 SP_CTRLRECT(page_border)->setRectangle(a);
1575 }
1578 void
1579 SPDesktop::_onActivate (SPDesktop* dt)
1580 {
1581 if (!dt->_widget) return;
1582 dt->_widget->activateDesktop();
1583 }
1585 void
1586 SPDesktop::_onDeactivate (SPDesktop* dt)
1587 {
1588 if (!dt->_widget) return;
1589 dt->_widget->deactivateDesktop();
1590 }
1592 void
1593 SPDesktop::_onSelectionModified
1594 (Inkscape::Selection */*selection*/, guint /*flags*/, SPDesktop *dt)
1595 {
1596 if (!dt->_widget) return;
1597 dt->_widget->updateScrollbars (dt->_d2w.descrim());
1598 }
1600 static void
1601 _onSelectionChanged
1602 (Inkscape::Selection *selection, SPDesktop *desktop)
1603 {
1604 /** \todo
1605 * only change the layer for single selections, or what?
1606 * This seems reasonable -- for multiple selections there can be many
1607 * different layers involved.
1608 */
1609 SPItem *item=selection->singleItem();
1610 if (item) {
1611 SPObject *layer=desktop->layerForObject(item);
1612 if ( layer && layer != desktop->currentLayer() ) {
1613 desktop->setCurrentLayer(layer);
1614 }
1615 }
1616 }
1618 /**
1619 * Calls event handler of current event context.
1620 * \param arena Unused
1621 * \todo fixme
1622 */
1623 static gint
1624 _arena_handler (SPCanvasArena */*arena*/, NRArenaItem *ai, GdkEvent *event, SPDesktop *desktop)
1625 {
1626 if (ai) {
1627 SPItem *spi = (SPItem*)NR_ARENA_ITEM_GET_DATA (ai);
1628 return sp_event_context_item_handler (desktop->event_context, spi, event);
1629 } else {
1630 return sp_event_context_root_handler (desktop->event_context, event);
1631 }
1632 }
1634 static void
1635 _layer_activated(SPObject *layer, SPDesktop *desktop) {
1636 g_return_if_fail(SP_IS_GROUP(layer));
1637 SP_GROUP(layer)->setLayerDisplayMode(desktop->dkey, SPGroup::LAYER);
1638 }
1640 /// Callback
1641 static void
1642 _layer_deactivated(SPObject *layer, SPDesktop *desktop) {
1643 g_return_if_fail(SP_IS_GROUP(layer));
1644 SP_GROUP(layer)->setLayerDisplayMode(desktop->dkey, SPGroup::GROUP);
1645 }
1647 /// Callback
1648 static void
1649 _layer_hierarchy_changed(SPObject */*top*/, SPObject *bottom,
1650 SPDesktop *desktop)
1651 {
1652 desktop->_layer_changed_signal.emit (bottom);
1653 }
1655 /// Called when document is starting to be rebuilt.
1656 static void
1657 _reconstruction_start (SPDesktop * desktop)
1658 {
1659 // printf("Desktop, starting reconstruction\n");
1660 desktop->_reconstruction_old_layer_id = g_strdup(SP_OBJECT_ID(desktop->currentLayer()));
1661 desktop->_layer_hierarchy->setBottom(desktop->currentRoot());
1663 /*
1664 GSList const * selection_objs = desktop->selection->list();
1665 for (; selection_objs != NULL; selection_objs = selection_objs->next) {
1667 }
1668 */
1669 desktop->selection->clear();
1671 // printf("Desktop, starting reconstruction end\n");
1672 }
1674 /// Called when document rebuild is finished.
1675 static void
1676 _reconstruction_finish (SPDesktop * desktop)
1677 {
1678 // printf("Desktop, finishing reconstruction\n");
1679 if (desktop->_reconstruction_old_layer_id == NULL)
1680 return;
1682 SPObject * newLayer = SP_OBJECT_DOCUMENT(desktop->namedview)->getObjectById(desktop->_reconstruction_old_layer_id);
1683 if (newLayer != NULL)
1684 desktop->setCurrentLayer(newLayer);
1686 g_free(desktop->_reconstruction_old_layer_id);
1687 desktop->_reconstruction_old_layer_id = NULL;
1688 // printf("Desktop, finishing reconstruction end\n");
1689 return;
1690 }
1692 /**
1693 * Namedview_modified callback.
1694 */
1695 static void
1696 _namedview_modified (SPObject *obj, guint flags, SPDesktop *desktop)
1697 {
1698 SPNamedView *nv=SP_NAMEDVIEW(obj);
1700 if (flags & SP_OBJECT_MODIFIED_FLAG) {
1702 /* Recalculate snap distances */
1703 /* FIXME: why is the desktop getting involved in setting up something
1704 ** that is entirely to do with the namedview?
1705 */
1706 _update_snap_distances (desktop);
1708 /* Show/hide page background */
1709 if (nv->pagecolor & 0xff) {
1710 sp_canvas_item_show (desktop->table);
1711 ((CtrlRect *) desktop->table)->setColor(0x00000000, true, nv->pagecolor);
1712 sp_canvas_item_move_to_z (desktop->table, 0);
1713 } else {
1714 sp_canvas_item_hide (desktop->table);
1715 }
1717 /* Show/hide page border */
1718 if (nv->showborder) {
1719 // show
1720 sp_canvas_item_show (desktop->page_border);
1721 // set color and shadow
1722 ((CtrlRect *) desktop->page_border)->setColor(nv->bordercolor, false, 0x00000000);
1723 if (nv->pageshadow) {
1724 ((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);
1725 }
1726 // place in the z-order stack
1727 if (nv->borderlayer == SP_BORDER_LAYER_BOTTOM) {
1728 sp_canvas_item_move_to_z (desktop->page_border, 2);
1729 } else {
1730 int order = sp_canvas_item_order (desktop->page_border);
1731 int morder = sp_canvas_item_order (desktop->drawing);
1732 if (morder > order) sp_canvas_item_raise (desktop->page_border,
1733 morder - order);
1734 }
1735 } else {
1736 sp_canvas_item_hide (desktop->page_border);
1737 if (nv->pageshadow) {
1738 ((CtrlRect *) desktop->page)->setShadow(0, 0x00000000);
1739 }
1740 }
1742 /* Show/hide page shadow */
1743 if (nv->showpageshadow && nv->pageshadow) {
1744 ((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);
1745 } else {
1746 ((CtrlRect *) desktop->page_border)->setShadow(0, 0x00000000);
1747 }
1749 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1750 if (SP_RGBA32_A_U(nv->pagecolor) < 128 ||
1751 (SP_RGBA32_R_U(nv->pagecolor) +
1752 SP_RGBA32_G_U(nv->pagecolor) +
1753 SP_RGBA32_B_U(nv->pagecolor)) >= 384) {
1754 // the background color is light or transparent, use black outline
1755 SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/onlight", 0xff);
1756 } else { // use white outline
1757 SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/ondark", 0xffffffff);
1758 }
1759 }
1760 }
1762 /**
1763 * Callback to reset snapper's distances.
1764 */
1765 static void
1766 _update_snap_distances (SPDesktop *desktop)
1767 {
1768 SPUnit const &px = sp_unit_get_by_id(SP_UNIT_PX);
1770 SPNamedView &nv = *desktop->namedview;
1772 //tell all grid snappers
1773 for ( GSList const *l = nv.grids; l != NULL; l = l->next) {
1774 Inkscape::CanvasGrid *grid = (Inkscape::CanvasGrid*) l->data;
1775 grid->snapper->setSnapperTolerance(sp_convert_distance_full(nv.gridtolerance,
1776 *nv.gridtoleranceunit,
1777 px));
1778 }
1780 nv.snap_manager.guide.setSnapperTolerance(sp_convert_distance_full(nv.guidetolerance,
1781 *nv.guidetoleranceunit,
1782 px));
1783 nv.snap_manager.object.setSnapperTolerance(sp_convert_distance_full(nv.objecttolerance,
1784 *nv.objecttoleranceunit,
1785 px));
1786 }
1789 Geom::Matrix SPDesktop::w2d() const
1790 {
1791 return _w2d;
1792 }
1794 Geom::Point SPDesktop::w2d(Geom::Point const &p) const
1795 {
1796 return p * _w2d;
1797 }
1799 Geom::Point SPDesktop::d2w(Geom::Point const &p) const
1800 {
1801 return p * _d2w;
1802 }
1804 Geom::Matrix SPDesktop::doc2dt() const
1805 {
1806 return _doc2dt;
1807 }
1809 Geom::Point SPDesktop::doc2dt(Geom::Point const &p) const
1810 {
1811 return p * _doc2dt;
1812 }
1814 Geom::Point SPDesktop::dt2doc(Geom::Point const &p) const
1815 {
1816 return p * _doc2dt.inverse();
1817 }
1820 /**
1821 * Pop event context from desktop's context stack. Never used.
1822 */
1823 // void
1824 // SPDesktop::pop_event_context (unsigned int key)
1825 // {
1826 // SPEventContext *ec = NULL;
1827 //
1828 // if (event_context && event_context->key == key) {
1829 // g_return_if_fail (event_context);
1830 // g_return_if_fail (event_context->next);
1831 // ec = event_context;
1832 // sp_event_context_deactivate (ec);
1833 // event_context = ec->next;
1834 // sp_event_context_activate (event_context);
1835 // _event_context_changed_signal.emit (this, ec);
1836 // }
1837 //
1838 // SPEventContext *ref = event_context;
1839 // while (ref && ref->next && ref->next->key != key)
1840 // ref = ref->next;
1841 //
1842 // if (ref && ref->next) {
1843 // ec = ref->next;
1844 // ref->next = ec->next;
1845 // }
1846 //
1847 // if (ec) {
1848 // sp_event_context_finish (ec);
1849 // g_object_unref (G_OBJECT (ec));
1850 // }
1851 // }
1853 /*
1854 Local Variables:
1855 mode:c++
1856 c-file-style:"stroustrup"
1857 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1858 indent-tabs-mode:nil
1859 fill-column:99
1860 End:
1861 */
1862 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :