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"
93 #include "desktop-style.h"
95 // TODO those includes are only for node tool quick zoom. Remove them after fixing it.
96 #include "ui/tool/node-tool.h"
97 #include "ui/tool/control-point-selection.h"
99 #include "display/sp-canvas.h"
101 namespace Inkscape { namespace XML { class Node; }}
103 // Callback declarations
104 static void _onSelectionChanged (Inkscape::Selection *selection, SPDesktop *desktop);
105 static gint _arena_handler (SPCanvasArena *arena, NRArenaItem *ai, GdkEvent *event, SPDesktop *desktop);
106 static void _layer_activated(SPObject *layer, SPDesktop *desktop);
107 static void _layer_deactivated(SPObject *layer, SPDesktop *desktop);
108 static void _layer_hierarchy_changed(SPObject *top, SPObject *bottom, SPDesktop *desktop);
109 static void _reconstruction_start(SPDesktop * desktop);
110 static void _reconstruction_finish(SPDesktop * desktop);
111 static void _namedview_modified (SPObject *obj, guint flags, SPDesktop *desktop);
113 /**
114 * Return new desktop object.
115 * \pre namedview != NULL.
116 * \pre canvas != NULL.
117 */
118 SPDesktop::SPDesktop() :
119 _dlg_mgr( 0 ),
120 namedview( 0 ),
121 canvas( 0 ),
122 selection( 0 ),
123 event_context( 0 ),
124 layer_manager( 0 ),
125 event_log( 0 ),
126 temporary_item_list( 0 ),
127 snapindicator( 0 ),
128 acetate( 0 ),
129 main( 0 ),
130 gridgroup( 0 ),
131 guides( 0 ),
132 drawing( 0 ),
133 sketch( 0 ),
134 controls( 0 ),
135 tempgroup ( 0 ),
136 table( 0 ),
137 page( 0 ),
138 page_border( 0 ),
139 current( 0 ),
140 _focusMode(false),
141 zooms_past( 0 ),
142 zooms_future( 0 ),
143 dkey( 0 ),
144 number( 0 ),
145 window_state(0),
146 interaction_disabled_counter( 0 ),
147 waiting_cursor( false ),
148 guides_active( false ),
149 gr_item( 0 ),
150 gr_point_type( 0 ),
151 gr_point_i( 0 ),
152 gr_fill_or_stroke( true ),
153 _layer_hierarchy( 0 ),
154 _reconstruction_old_layer_id( 0 ),
155 _display_mode(Inkscape::RENDERMODE_NORMAL),
156 _widget( 0 ),
157 _inkscape( 0 ),
158 _guides_message_context( 0 ),
159 _active( false ),
160 _w2d(),
161 _d2w(),
162 _doc2dt( Geom::Scale(1, -1) ),
163 grids_visible( false )
164 {
165 _d2w.setIdentity();
166 _w2d.setIdentity();
168 selection = Inkscape::GC::release( new Inkscape::Selection(this) );
169 }
171 void
172 SPDesktop::init (SPNamedView *nv, SPCanvas *aCanvas, Inkscape::UI::View::EditWidgetInterface *widget)
173 {
174 _widget = widget;
176 // Temporary workaround for link order issues:
177 Inkscape::DeviceManager::getManager().getDevices();
178 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
180 _guides_message_context = new Inkscape::MessageContext(const_cast<Inkscape::MessageStack*>(messageStack()));
182 current = prefs->getStyle("/desktop/style");
184 namedview = nv;
185 canvas = aCanvas;
187 SPDocument *document = SP_OBJECT_DOCUMENT (namedview);
188 /* Kill flicker */
189 document->ensure_up_to_date ();
191 /* Setup Dialog Manager */
192 _dlg_mgr = &Inkscape::UI::Dialog::DialogManager::getInstance();
194 dkey = SPItem::display_key_new (1);
196 /* Connect document */
197 setDocument (document);
199 number = namedview->getViewCount();
202 /* Setup Canvas */
203 g_object_set_data (G_OBJECT (canvas), "SPDesktop", this);
205 SPCanvasGroup *root = sp_canvas_root (canvas);
207 /* Setup adminstrative layers */
208 acetate = sp_canvas_item_new (root, GNOME_TYPE_CANVAS_ACETATE, NULL);
209 g_signal_connect (G_OBJECT (acetate), "event", G_CALLBACK (sp_desktop_root_handler), this);
210 main = (SPCanvasGroup *) sp_canvas_item_new (root, SP_TYPE_CANVAS_GROUP, NULL);
211 g_signal_connect (G_OBJECT (main), "event", G_CALLBACK (sp_desktop_root_handler), this);
213 table = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
214 SP_CTRLRECT(table)->setRectangle(Geom::Rect(Geom::Point(-80000, -80000), Geom::Point(80000, 80000)));
215 SP_CTRLRECT(table)->setColor(0x00000000, true, 0x00000000);
216 sp_canvas_item_move_to_z (table, 0);
218 page = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
219 ((CtrlRect *) page)->setColor(0x00000000, FALSE, 0x00000000);
220 page_border = sp_canvas_item_new (main, SP_TYPE_CTRLRECT, NULL);
222 drawing = sp_canvas_item_new (main, SP_TYPE_CANVAS_ARENA, NULL);
223 g_signal_connect (G_OBJECT (drawing), "arena_event", G_CALLBACK (_arena_handler), this);
225 SP_CANVAS_ARENA (drawing)->arena->delta = prefs->getDouble("/options/cursortolerance/value", 1.0); // default is 1 px
227 if (prefs->getBool("/options/startmode/outline")) {
228 // Start in outline mode
229 setDisplayModeOutline();
230 } else {
231 // Start in normal mode, default
232 setDisplayModeNormal();
233 }
235 // The order in which these canvas items are added determines the z-order. It's therefore
236 // important to add the tempgroup (which will contain the snapindicator) before adding the
237 // controls. Only this way one will be able to quickly (before the snap indicator has
238 // disappeared) reselect a node after snapping it. If the z-order is wrong however, this
239 // will not work (the snap indicator is on top of the node handler; is the snapindicator
240 // being selected? or does it intercept some of the events that should have gone to the
241 // node handler? see bug https://bugs.launchpad.net/inkscape/+bug/414142)
242 gridgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
243 guides = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
244 sketch = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
245 tempgroup = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
246 controls = (SPCanvasGroup *) sp_canvas_item_new (main, SP_TYPE_CANVAS_GROUP, NULL);
248 /* Push select tool to the bottom of stack */
249 /** \todo
250 * FIXME: this is the only call to this. Everything else seems to just
251 * call "set" instead of "push". Can we assume that there is only one
252 * context ever?
253 */
254 push_event_context (SP_TYPE_SELECT_CONTEXT, "/tools/select", SP_EVENT_CONTEXT_STATIC);
256 // display rect and zoom are now handled in sp_desktop_widget_realize()
258 Geom::Rect const d(Geom::Point(0.0, 0.0),
259 Geom::Point(document->getWidth(), document->getHeight()));
261 SP_CTRLRECT(page)->setRectangle(d);
262 SP_CTRLRECT(page_border)->setRectangle(d);
264 /* the following sets the page shadow on the canvas
265 It was originally set to 5, which is really cheesy!
266 It now is an attribute in the document's namedview. If a value of
267 0 is used, then the constructor for a shadow is not initialized.
268 */
270 if ( namedview->pageshadow != 0 && namedview->showpageshadow ) {
271 SP_CTRLRECT(page_border)->setShadow(namedview->pageshadow, 0x3f3f3fff);
272 }
275 /* Connect event for page resize */
276 _doc2dt[5] = document->getHeight ();
277 sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (drawing), _doc2dt);
279 _modified_connection = namedview->connectModified(sigc::bind<2>(sigc::ptr_fun(&_namedview_modified), this));
281 NRArenaItem *ai = SP_ITEM (sp_document_root (document))->invoke_show (
282 SP_CANVAS_ARENA (drawing)->arena,
283 dkey,
284 SP_ITEM_SHOW_DISPLAY);
285 if (ai) {
286 nr_arena_item_add_child (SP_CANVAS_ARENA (drawing)->root, ai, NULL);
287 }
289 namedview->show(this);
290 /* Ugly hack */
291 activate_guides (true);
292 /* Ugly hack */
293 _namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);
295 /* Set up notification of rebuilding the document, this allows
296 for saving object related settings in the document. */
297 _reconstruction_start_connection =
298 document->connectReconstructionStart(sigc::bind(sigc::ptr_fun(_reconstruction_start), this));
299 _reconstruction_finish_connection =
300 document->connectReconstructionFinish(sigc::bind(sigc::ptr_fun(_reconstruction_finish), this));
301 _reconstruction_old_layer_id = NULL;
303 // ?
304 // sp_active_desktop_set (desktop);
305 _inkscape = INKSCAPE;
307 _activate_connection = _activate_signal.connect(
308 sigc::bind(
309 sigc::ptr_fun(_onActivate),
310 this
311 )
312 );
313 _deactivate_connection = _deactivate_signal.connect(
314 sigc::bind(
315 sigc::ptr_fun(_onDeactivate),
316 this
317 )
318 );
320 _sel_modified_connection = selection->connectModified(
321 sigc::bind(
322 sigc::ptr_fun(&_onSelectionModified),
323 this
324 )
325 );
326 _sel_changed_connection = selection->connectChanged(
327 sigc::bind(
328 sigc::ptr_fun(&_onSelectionChanged),
329 this
330 )
331 );
334 /* setup LayerManager */
335 // (Setting up after the connections are all in place, as it may use some of them)
336 layer_manager = new Inkscape::LayerManager( this );
338 showGrids(namedview->grids_visible, false);
340 temporary_item_list = new Inkscape::Display::TemporaryItemList( this );
341 snapindicator = new Inkscape::Display::SnapIndicator ( this );
342 }
345 void SPDesktop::destroy()
346 {
347 if (snapindicator) {
348 delete snapindicator;
349 snapindicator = NULL;
350 }
351 if (temporary_item_list) {
352 delete temporary_item_list;
353 temporary_item_list = NULL;
354 }
356 if (selection) {
357 delete selection;
358 selection = NULL;
359 }
361 namedview->hide(this);
363 _activate_connection.disconnect();
364 _deactivate_connection.disconnect();
365 _sel_modified_connection.disconnect();
366 _sel_changed_connection.disconnect();
367 _modified_connection.disconnect();
368 _commit_connection.disconnect();
369 _reconstruction_start_connection.disconnect();
370 _reconstruction_finish_connection.disconnect();
372 g_signal_handlers_disconnect_by_func(G_OBJECT (acetate), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);
373 g_signal_handlers_disconnect_by_func(G_OBJECT (main), (gpointer) G_CALLBACK(sp_desktop_root_handler), this);
374 g_signal_handlers_disconnect_by_func(G_OBJECT (drawing), (gpointer) G_CALLBACK(_arena_handler), this);
376 while (event_context) {
377 SPEventContext *ec = event_context;
378 event_context = ec->next;
379 sp_event_context_finish (ec);
380 g_object_unref (G_OBJECT (ec));
381 }
383 if (_layer_hierarchy) {
384 delete _layer_hierarchy;
385 // _layer_hierarchy = NULL; //this should be here, but commented to find other bug somewhere else.
386 }
388 if (layer_manager) {
389 delete layer_manager;
390 layer_manager = NULL;
391 }
393 if (_inkscape) {
394 _inkscape = NULL;
395 }
397 if (drawing) {
398 SP_ITEM (sp_document_root (doc()))->invoke_hide (dkey);
399 drawing = NULL;
400 }
402 delete _guides_message_context;
403 _guides_message_context = NULL;
405 g_list_free (zooms_past);
406 g_list_free (zooms_future);
407 }
409 SPDesktop::~SPDesktop() {}
411 //--------------------------------------------------------------------
412 /* Public methods */
415 /* These methods help for temporarily showing things on-canvas.
416 * The *only* valid use of the TemporaryItem* that you get from add_temporary_canvasitem
417 * is when you want to prematurely remove the item from the canvas, by calling
418 * desktop->remove_temporary_canvasitem(tempitem).
419 */
420 /** Note that lifetime is measured in milliseconds
421 * One should *not* keep a reference to the SPCanvasItem, the temporary item code will
422 * delete the object for you and the reference will become invalid without you knowing it.
423 * It is perfectly safe to ignore the returned pointer: the object is deleted by itself, so don't delete it elsewhere!
424 * The *only* valid use of the returned TemporaryItem* is as argument for SPDesktop::remove_temporary_canvasitem,
425 * because the object might be deleted already without you knowing it.
426 * move_to_bottom = true by default so the item does not interfere with handling of other items on the canvas like nodes.
427 */
428 Inkscape::Display::TemporaryItem *
429 SPDesktop::add_temporary_canvasitem (SPCanvasItem *item, guint lifetime, bool move_to_bottom)
430 {
431 if (move_to_bottom) {
432 sp_canvas_item_move_to_z(item, 0);
433 }
435 return temporary_item_list->add_item(item, lifetime);
436 }
438 /** It is perfectly safe to call this function while the object has already been deleted due to a timeout.
439 */
440 void
441 SPDesktop::remove_temporary_canvasitem (Inkscape::Display::TemporaryItem * tempitem)
442 {
443 // check for non-null temporary_item_list, because during destruction of desktop, some destructor might try to access this list!
444 if (tempitem && temporary_item_list) {
445 temporary_item_list->delete_item(tempitem);
446 }
447 }
449 void SPDesktop::_setDisplayMode(Inkscape::RenderMode mode) {
450 SP_CANVAS_ARENA (drawing)->arena->rendermode = mode;
451 canvas->rendermode = mode;
452 _display_mode = mode;
453 sp_canvas_item_affine_absolute (SP_CANVAS_ITEM (main), _d2w); // redraw
454 _widget->setTitle(SP_DOCUMENT_NAME(sp_desktop_document(this)));
455 }
457 void SPDesktop::displayModeToggle() {
458 switch (_display_mode) {
459 case Inkscape::RENDERMODE_NORMAL:
460 _setDisplayMode(Inkscape::RENDERMODE_NO_FILTERS);
461 break;
462 case Inkscape::RENDERMODE_NO_FILTERS:
463 _setDisplayMode(Inkscape::RENDERMODE_OUTLINE);
464 break;
465 case Inkscape::RENDERMODE_OUTLINE:
466 _setDisplayMode(Inkscape::RENDERMODE_PRINT_COLORS_PREVIEW);
467 break;
468 case Inkscape::RENDERMODE_PRINT_COLORS_PREVIEW:
469 default:
470 _setDisplayMode(Inkscape::RENDERMODE_NORMAL);
471 }
472 }
474 /**
475 * Returns current root (=bottom) layer.
476 */
477 SPObject *SPDesktop::currentRoot() const
478 {
479 return _layer_hierarchy ? _layer_hierarchy->top() : NULL;
480 }
482 /**
483 * Returns current top layer.
484 */
485 SPObject *SPDesktop::currentLayer() const
486 {
487 return _layer_hierarchy ? _layer_hierarchy->bottom() : NULL;
488 }
490 /**
491 * Sets the current layer of the desktop.
492 *
493 * Make \a object the top layer.
494 */
495 void SPDesktop::setCurrentLayer(SPObject *object) {
496 g_return_if_fail(SP_IS_GROUP(object));
497 g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );
498 // printf("Set Layer to ID: %s\n", SP_OBJECT_ID(object));
499 _layer_hierarchy->setBottom(object);
500 }
502 void SPDesktop::toggleLayerSolo(SPObject *object) {
503 g_return_if_fail(SP_IS_GROUP(object));
504 g_return_if_fail( currentRoot() == object || (currentRoot() && currentRoot()->isAncestorOf(object)) );
506 bool othersShowing = false;
507 std::vector<SPObject*> layers;
508 for ( SPObject* obj = Inkscape::next_layer(currentRoot(), object); obj; obj = Inkscape::next_layer(currentRoot(), obj) ) {
509 layers.push_back(obj);
510 othersShowing |= !SP_ITEM(obj)->isHidden();
511 }
512 for ( SPObject* obj = Inkscape::previous_layer(currentRoot(), object); obj; obj = Inkscape::previous_layer(currentRoot(), obj) ) {
513 layers.push_back(obj);
514 othersShowing |= !SP_ITEM(obj)->isHidden();
515 }
518 if ( SP_ITEM(object)->isHidden() ) {
519 SP_ITEM(object)->setHidden(false);
520 }
522 for ( std::vector<SPObject*>::iterator it = layers.begin(); it != layers.end(); ++it ) {
523 SP_ITEM(*it)->setHidden(othersShowing);
524 }
525 }
527 /**
528 * Return layer that contains \a object.
529 */
530 SPObject *SPDesktop::layerForObject(SPObject *object) {
531 g_return_val_if_fail(object != NULL, NULL);
533 SPObject *root=currentRoot();
534 object = SP_OBJECT_PARENT(object);
535 while ( object && object != root && !isLayer(object) ) {
536 object = SP_OBJECT_PARENT(object);
537 }
538 return object;
539 }
541 /**
542 * True if object is a layer.
543 */
544 bool SPDesktop::isLayer(SPObject *object) const {
545 return ( SP_IS_GROUP(object)
546 && ( SP_GROUP(object)->effectiveLayerMode(this->dkey)
547 == SPGroup::LAYER ) );
548 }
550 /**
551 * True if desktop viewport fully contains \a item's bbox.
552 */
553 bool SPDesktop::isWithinViewport (SPItem *item) const
554 {
555 Geom::Rect const viewport = get_display_area();
556 Geom::OptRect const bbox = item->getBboxDesktop();
557 if (bbox) {
558 return viewport.contains(*bbox);
559 } else {
560 return true;
561 }
562 }
564 ///
565 bool SPDesktop::itemIsHidden(SPItem const *item) const {
566 return item->isHidden(this->dkey);
567 }
569 /**
570 * Set activate property of desktop; emit signal if changed.
571 */
572 void
573 SPDesktop::set_active (bool new_active)
574 {
575 if (new_active != _active) {
576 _active = new_active;
577 if (new_active) {
578 _activate_signal.emit();
579 } else {
580 _deactivate_signal.emit();
581 }
582 }
583 }
585 /**
586 * Set activate status of current desktop's named view.
587 */
588 void
589 SPDesktop::activate_guides(bool activate)
590 {
591 guides_active = activate;
592 namedview->activateGuides(this, activate);
593 }
595 /**
596 * Make desktop switch documents.
597 */
598 void
599 SPDesktop::change_document (SPDocument *theDocument)
600 {
601 g_return_if_fail (theDocument != NULL);
603 /* unselect everything before switching documents */
604 selection->clear();
606 setDocument (theDocument);
608 /* update the rulers, connect the desktop widget's signal to the new namedview etc.
609 (this can probably be done in a better way) */
610 Gtk::Window *parent = this->getToplevel();
611 g_assert(parent != NULL);
612 SPDesktopWidget *dtw = (SPDesktopWidget *) parent->get_data("desktopwidget");
613 if (dtw) {
614 dtw->desktop = this;
615 }
616 dtw->updateNamedview();
618 _namedview_modified (namedview, SP_OBJECT_MODIFIED_FLAG, this);
619 _document_replaced_signal.emit (this, theDocument);
620 }
622 /**
623 * Make desktop switch event contexts.
624 */
625 void
626 SPDesktop::set_event_context (GtkType type, const gchar *config)
627 {
628 SPEventContext *ec;
629 while (event_context) {
630 ec = event_context;
631 sp_event_context_deactivate (ec);
632 // we have to keep event_context valid during destruction - otherwise writing
633 // destructors is next to impossible
634 SPEventContext *next = ec->next;
635 sp_event_context_finish (ec);
636 g_object_unref (G_OBJECT (ec));
637 event_context = next;
638 }
640 ec = sp_event_context_new (type, this, config, SP_EVENT_CONTEXT_STATIC);
641 ec->next = event_context;
642 event_context = ec;
643 sp_event_context_activate (ec);
644 _event_context_changed_signal.emit (this, ec);
645 }
647 /**
648 * Push event context onto desktop's context stack.
649 */
650 void
651 SPDesktop::push_event_context (GtkType type, const gchar *config, unsigned int key)
652 {
653 SPEventContext *ref, *ec;
655 if (event_context && event_context->key == key) return;
656 ref = event_context;
657 while (ref && ref->next && ref->next->key != key) ref = ref->next;
658 if (ref && ref->next) {
659 ec = ref->next;
660 ref->next = ec->next;
661 sp_event_context_finish (ec);
662 g_object_unref (G_OBJECT (ec));
663 }
665 if (event_context) sp_event_context_deactivate (event_context);
666 ec = sp_event_context_new (type, this, config, key);
667 ec->next = event_context;
668 event_context = ec;
669 sp_event_context_activate (ec);
670 _event_context_changed_signal.emit (this, ec);
671 }
673 /**
674 * Sets the coordinate status to a given point
675 */
676 void
677 SPDesktop::set_coordinate_status (Geom::Point p) {
678 _widget->setCoordinateStatus(p);
679 }
681 /**
682 * \see sp_document_item_from_list_at_point_bottom()
683 */
684 SPItem *
685 SPDesktop::item_from_list_at_point_bottom (const GSList *list, Geom::Point const p) const
686 {
687 g_return_val_if_fail (doc() != NULL, NULL);
688 return SPDocument::item_from_list_at_point_bottom (dkey, SP_GROUP (doc()->root), list, p);
689 }
691 /**
692 * \see sp_document_item_at_point()
693 */
694 SPItem *
695 SPDesktop::item_at_point (Geom::Point const p, bool into_groups, SPItem *upto) const
696 {
697 g_return_val_if_fail (doc() != NULL, NULL);
698 return doc()->item_at_point ( dkey, p, into_groups, upto);
699 }
701 /**
702 * \see sp_document_group_at_point()
703 */
704 SPItem *
705 SPDesktop::group_at_point (Geom::Point const p) const
706 {
707 g_return_val_if_fail (doc() != NULL, NULL);
708 return doc()->group_at_point (dkey, p);
709 }
711 /**
712 * \brief Returns the mouse point in document coordinates; if mouse is
713 * outside the canvas, returns the center of canvas viewpoint
714 */
715 Geom::Point
716 SPDesktop::point() const
717 {
718 Geom::Point p = _widget->getPointer();
719 Geom::Point pw = sp_canvas_window_to_world (canvas, p);
720 p = w2d(pw);
722 Geom::Rect const r = canvas->getViewbox();
724 Geom::Point r0 = w2d(r.min());
725 Geom::Point r1 = w2d(r.max());
727 if (p[Geom::X] >= r0[Geom::X] &&
728 p[Geom::X] <= r1[Geom::X] &&
729 p[Geom::Y] >= r1[Geom::Y] &&
730 p[Geom::Y] <= r0[Geom::Y])
731 {
732 return p;
733 } else {
734 return (r0 + r1) / 2;
735 }
736 }
738 /**
739 * Put current zoom data in history list.
740 */
741 void
742 SPDesktop::push_current_zoom (GList **history)
743 {
744 Geom::Rect const area = get_display_area();
746 NRRect *old_zoom = g_new(NRRect, 1);
747 old_zoom->x0 = area.min()[Geom::X];
748 old_zoom->x1 = area.max()[Geom::X];
749 old_zoom->y0 = area.min()[Geom::Y];
750 old_zoom->y1 = area.max()[Geom::Y];
751 if ( *history == NULL
752 || !( ( ((NRRect *) ((*history)->data))->x0 == old_zoom->x0 ) &&
753 ( ((NRRect *) ((*history)->data))->x1 == old_zoom->x1 ) &&
754 ( ((NRRect *) ((*history)->data))->y0 == old_zoom->y0 ) &&
755 ( ((NRRect *) ((*history)->data))->y1 == old_zoom->y1 ) ) )
756 {
757 *history = g_list_prepend (*history, old_zoom);
758 }
759 }
761 /**
762 * Set viewbox (x0, x1, y0 and y1 are in document pixels. Border is in screen pixels).
763 */
764 void
765 SPDesktop::set_display_area (double x0, double y0, double x1, double y1, double border, bool log)
766 {
767 g_assert(_widget);
769 // save the zoom
770 if (log) {
771 push_current_zoom(&zooms_past);
772 // if we do a logged zoom, our zoom-forward list is invalidated, so delete it
773 g_list_free (zooms_future);
774 zooms_future = NULL;
775 }
777 double const cx = 0.5 * (x0 + x1);
778 double const cy = 0.5 * (y0 + y1);
780 // FIXME: This 2geom idiom doesn't allow us to declare dbox const
781 Geom::Rect viewbox = canvas->getViewbox();
782 viewbox.expandBy(-border);
784 double scale = _d2w.descrim();
785 double newscale;
786 if (((x1 - x0) * viewbox.dimensions()[Geom::Y]) > ((y1 - y0) * viewbox.dimensions()[Geom::X])) {
787 newscale = viewbox.dimensions()[Geom::X] / (x1 - x0);
788 } else {
789 newscale = viewbox.dimensions()[Geom::Y] / (y1 - y0);
790 }
792 newscale = CLAMP(newscale, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX); // unit: 'screen pixels' per 'document pixels'
794 int clear = FALSE;
795 if (!NR_DF_TEST_CLOSE (newscale, scale, 1e-4 * scale)) {
796 // zoom changed - set new zoom factors
797 _d2w = Geom::Scale(newscale, -newscale);
798 _w2d = Geom::Scale(1/newscale, 1/-newscale);
799 sp_canvas_item_affine_absolute(SP_CANVAS_ITEM(main), _d2w);
800 clear = TRUE;
801 signal_zoom_changed.emit(_d2w.descrim());
802 }
804 /* Calculate top left corner (in document pixels) */
805 x0 = cx - 0.5 * viewbox.dimensions()[Geom::X] / newscale;
806 y1 = cy + 0.5 * viewbox.dimensions()[Geom::Y] / newscale;
808 /* Scroll */
809 sp_canvas_scroll_to (canvas, x0 * newscale - border, y1 * -newscale - border, clear);
811 /* update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */
812 sp_box3d_context_update_lines(event_context);
814 _widget->updateRulers();
815 _widget->updateScrollbars(_d2w.descrim());
816 _widget->updateZoom();
817 }
819 void SPDesktop::set_display_area(Geom::Rect const &a, Geom::Coord b, bool log)
820 {
821 set_display_area(a.min()[Geom::X], a.min()[Geom::Y], a.max()[Geom::X], a.max()[Geom::Y], b, log);
822 }
824 /**
825 * Return viewbox dimensions.
826 */
827 Geom::Rect SPDesktop::get_display_area() const
828 {
829 Geom::Rect const viewbox = canvas->getViewbox();
831 double const scale = _d2w[0];
833 return Geom::Rect(Geom::Point(viewbox.min()[Geom::X] / scale, viewbox.max()[Geom::Y] / -scale),
834 Geom::Point(viewbox.max()[Geom::X] / scale, viewbox.min()[Geom::Y] / -scale));
835 }
837 /**
838 * Revert back to previous zoom if possible.
839 */
840 void
841 SPDesktop::prev_zoom()
842 {
843 if (zooms_past == NULL) {
844 messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No previous zoom."));
845 return;
846 }
848 // push current zoom into forward zooms list
849 push_current_zoom (&zooms_future);
851 // restore previous zoom
852 set_display_area (((NRRect *) zooms_past->data)->x0,
853 ((NRRect *) zooms_past->data)->y0,
854 ((NRRect *) zooms_past->data)->x1,
855 ((NRRect *) zooms_past->data)->y1,
856 0, false);
858 // remove the just-added zoom from the past zooms list
859 zooms_past = g_list_remove (zooms_past, ((NRRect *) zooms_past->data));
860 }
862 /**
863 * Set zoom to next in list.
864 */
865 void
866 SPDesktop::next_zoom()
867 {
868 if (zooms_future == NULL) {
869 this->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("No next zoom."));
870 return;
871 }
873 // push current zoom into past zooms list
874 push_current_zoom (&zooms_past);
876 // restore next zoom
877 set_display_area (((NRRect *) zooms_future->data)->x0,
878 ((NRRect *) zooms_future->data)->y0,
879 ((NRRect *) zooms_future->data)->x1,
880 ((NRRect *) zooms_future->data)->y1,
881 0, false);
883 // remove the just-used zoom from the zooms_future list
884 zooms_future = g_list_remove (zooms_future, ((NRRect *) zooms_future->data));
885 }
887 /** \brief Performs a quick zoom into what the user is working on
888 \param enable Whether we're going in or out of quick zoom
890 */
891 void
892 SPDesktop::zoom_quick (bool enable)
893 {
894 if (enable == _quick_zoom_enabled) {
895 return;
896 }
898 if (enable == true) {
899 _quick_zoom_stored_area = get_display_area();
900 bool zoomed = false;
902 // TODO This needs to migrate into the node tool, but currently the design
903 // of this method is sufficiently wrong to prevent this.
904 if (!zoomed && INK_IS_NODE_TOOL(event_context)) {
905 InkNodeTool *nt = static_cast<InkNodeTool*>(event_context);
906 if (!nt->_selected_nodes->empty()) {
907 Geom::Rect nodes = *nt->_selected_nodes->bounds();
908 double area = nodes.area();
909 // do not zoom if a single cusp node is selected aand the bounds
910 // have zero area.
911 if (!Geom::are_near(area, 0) && area * 2.0 < _quick_zoom_stored_area.area()) {
912 set_display_area(nodes, true);
913 zoomed = true;
914 }
915 }
916 }
918 if (!zoomed) {
919 Geom::OptRect const d = selection->bounds();
920 if (d && d->area() * 2.0 < _quick_zoom_stored_area.area()) {
921 set_display_area(*d, true);
922 zoomed = true;
923 }
924 }
926 if (!zoomed) {
927 zoom_relative(_quick_zoom_stored_area.midpoint()[Geom::X], _quick_zoom_stored_area.midpoint()[Geom::Y], 2.0);
928 zoomed = true;
929 }
930 } else {
931 set_display_area(_quick_zoom_stored_area, false);
932 }
934 _quick_zoom_enabled = enable;
935 return;
936 }
938 /**
939 * Zoom to point with absolute zoom factor.
940 */
941 void
942 SPDesktop::zoom_absolute_keep_point (double cx, double cy, double px, double py, double zoom)
943 {
944 zoom = CLAMP (zoom, SP_DESKTOP_ZOOM_MIN, SP_DESKTOP_ZOOM_MAX);
946 // maximum or minimum zoom reached, but there's no exact equality because of rounding errors;
947 // this check prevents "sliding" when trying to zoom in at maximum zoom;
948 /// \todo someone please fix calculations properly and remove this hack
949 if (fabs(_d2w.descrim() - zoom) < 0.0001*zoom && (fabs(SP_DESKTOP_ZOOM_MAX - zoom) < 0.01 || fabs(SP_DESKTOP_ZOOM_MIN - zoom) < 0.000001))
950 return;
952 Geom::Rect const viewbox = canvas->getViewbox();
954 double const width2 = viewbox.dimensions()[Geom::X] / zoom;
955 double const height2 = viewbox.dimensions()[Geom::Y] / zoom;
957 set_display_area(cx - px * width2,
958 cy - py * height2,
959 cx + (1 - px) * width2,
960 cy + (1 - py) * height2,
961 0.0);
962 }
964 /**
965 * Apply the desktop's current style or the tool style to the object.
966 */
967 void SPDesktop::applyCurrentOrToolStyle(SPObject *obj, Glib::ustring const &tool_path, bool with_text)
968 {
969 SPCSSAttr *css_current = sp_desktop_get_style(this, with_text);
970 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
972 if (prefs->getBool(tool_path + "/usecurrent") && css_current) {
973 sp_repr_css_set(obj->getRepr(), css_current, "style");
974 } else {
975 SPCSSAttr *css = prefs->getInheritedStyle(tool_path + "/style");
976 sp_repr_css_set(obj->getRepr(), css, "style");
977 sp_repr_css_attr_unref(css);
978 }
979 if (css_current) {
980 sp_repr_css_attr_unref(css_current);
981 }
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(doc()->getWidth(), doc()->getHeight()));
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 (doc()->getWidth() < 1.0) {
1057 return;
1058 }
1060 Geom::Rect d(Geom::Point(0, a.midpoint()[Geom::Y]),
1061 Geom::Point(doc()->getWidth(), 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 = docitem->getBboxDesktop();
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::toggleSnapGlobal()
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 (sp_document_root (this->doc()))->invoke_hide (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 (sp_document_root (doc))->invoke_show (
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(desktop->currentLayer()->getId());
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 /* Show/hide page background */
1703 if (nv->pagecolor & 0xff) {
1704 sp_canvas_item_show (desktop->table);
1705 ((CtrlRect *) desktop->table)->setColor(0x00000000, true, nv->pagecolor);
1706 sp_canvas_item_move_to_z (desktop->table, 0);
1707 } else {
1708 sp_canvas_item_hide (desktop->table);
1709 }
1711 /* Show/hide page border */
1712 if (nv->showborder) {
1713 // show
1714 sp_canvas_item_show (desktop->page_border);
1715 // set color and shadow
1716 ((CtrlRect *) desktop->page_border)->setColor(nv->bordercolor, false, 0x00000000);
1717 if (nv->pageshadow) {
1718 ((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);
1719 }
1720 // place in the z-order stack
1721 if (nv->borderlayer == SP_BORDER_LAYER_BOTTOM) {
1722 sp_canvas_item_move_to_z (desktop->page_border, 2);
1723 } else {
1724 int order = sp_canvas_item_order (desktop->page_border);
1725 int morder = sp_canvas_item_order (desktop->drawing);
1726 if (morder > order) sp_canvas_item_raise (desktop->page_border,
1727 morder - order);
1728 }
1729 } else {
1730 sp_canvas_item_hide (desktop->page_border);
1731 if (nv->pageshadow) {
1732 ((CtrlRect *) desktop->page)->setShadow(0, 0x00000000);
1733 }
1734 }
1736 /* Show/hide page shadow */
1737 if (nv->showpageshadow && nv->pageshadow) {
1738 ((CtrlRect *) desktop->page_border)->setShadow(nv->pageshadow, nv->bordercolor);
1739 } else {
1740 ((CtrlRect *) desktop->page_border)->setShadow(0, 0x00000000);
1741 }
1743 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1744 if (SP_RGBA32_A_U(nv->pagecolor) < 128 ||
1745 (SP_RGBA32_R_U(nv->pagecolor) +
1746 SP_RGBA32_G_U(nv->pagecolor) +
1747 SP_RGBA32_B_U(nv->pagecolor)) >= 384) {
1748 // the background color is light or transparent, use black outline
1749 SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/onlight", 0xff);
1750 } else { // use white outline
1751 SP_CANVAS_ARENA (desktop->drawing)->arena->outlinecolor = prefs->getInt("/options/wireframecolors/ondark", 0xffffffff);
1752 }
1753 }
1754 }
1756 Geom::Matrix SPDesktop::w2d() const
1757 {
1758 return _w2d;
1759 }
1761 Geom::Point SPDesktop::w2d(Geom::Point const &p) const
1762 {
1763 return p * _w2d;
1764 }
1766 Geom::Point SPDesktop::d2w(Geom::Point const &p) const
1767 {
1768 return p * _d2w;
1769 }
1771 Geom::Matrix SPDesktop::doc2dt() const
1772 {
1773 return _doc2dt;
1774 }
1776 Geom::Matrix SPDesktop::dt2doc() const
1777 {
1778 // doc2dt is its own inverse
1779 return _doc2dt;
1780 }
1782 Geom::Point SPDesktop::doc2dt(Geom::Point const &p) const
1783 {
1784 return p * _doc2dt;
1785 }
1787 Geom::Point SPDesktop::dt2doc(Geom::Point const &p) const
1788 {
1789 return p * dt2doc();
1790 }
1793 /*
1794 * Pop event context from desktop's context stack. Never used.
1795 */
1796 // void
1797 // SPDesktop::pop_event_context (unsigned int key)
1798 // {
1799 // SPEventContext *ec = NULL;
1800 //
1801 // if (event_context && event_context->key == key) {
1802 // g_return_if_fail (event_context);
1803 // g_return_if_fail (event_context->next);
1804 // ec = event_context;
1805 // sp_event_context_deactivate (ec);
1806 // event_context = ec->next;
1807 // sp_event_context_activate (event_context);
1808 // _event_context_changed_signal.emit (this, ec);
1809 // }
1810 //
1811 // SPEventContext *ref = event_context;
1812 // while (ref && ref->next && ref->next->key != key)
1813 // ref = ref->next;
1814 //
1815 // if (ref && ref->next) {
1816 // ec = ref->next;
1817 // ref->next = ec->next;
1818 // }
1819 //
1820 // if (ec) {
1821 // sp_event_context_finish (ec);
1822 // g_object_unref (G_OBJECT (ec));
1823 // }
1824 // }
1826 /*
1827 Local Variables:
1828 mode:c++
1829 c-file-style:"stroustrup"
1830 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1831 indent-tabs-mode:nil
1832 fill-column:99
1833 End:
1834 */
1835 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :