735ddf87ef61c97a8f2f4a3ca7d227ea7e59a59c
1 /** @file
2 * @brief New node tool - implementation
3 */
4 /* Authors:
5 * Krzysztof KosiĆski <tweenk@gmail.com>
6 *
7 * Copyright (C) 2009 Authors
8 * Released under GNU GPL, read the file 'COPYING' for more information
9 */
11 #include <glib.h>
12 #include <glib/gi18n.h>
13 #include "desktop.h"
14 #include "desktop-handles.h"
15 #include "display/canvas-bpath.h"
16 #include "display/curve.h"
17 #include "display/sp-canvas.h"
18 #include "document.h"
19 #include "live_effects/lpeobject.h"
20 #include "message-context.h"
21 #include "selection.h"
22 #include "shape-editor.h" // temporary!
23 #include "sp-clippath.h"
24 #include "sp-item-group.h"
25 #include "sp-mask.h"
26 #include "sp-object-group.h"
27 #include "sp-path.h"
28 #include "ui/tool/node-tool.h"
29 #include "ui/tool/control-point-selection.h"
30 #include "ui/tool/curve-drag-point.h"
31 #include "ui/tool/event-utils.h"
32 #include "ui/tool/manipulator.h"
33 #include "ui/tool/multi-path-manipulator.h"
34 #include "ui/tool/path-manipulator.h"
35 #include "ui/tool/selector.h"
36 #include "ui/tool/shape-record.h"
38 #include "pixmaps/cursor-node.xpm"
39 #include "pixmaps/cursor-node-d.xpm"
41 /** @struct InkNodeTool
42 *
43 * Node tool event context.
44 *
45 * @par Architectural overview of the tool
46 * @par
47 * Here's a breakdown of what each object does.
48 * - Handle: shows a handle and keeps the node type constraint (smooth / symmetric) by updating
49 * the other handle's position when dragged. Its move() method cannot violate the constraints.
50 * - Node: keeps node type constraints for auto nodes and smooth nodes at ends of linear segments.
51 * Its move() method cannot violate constraints. Handles linear grow and dispatches spatial grow
52 * to MultiPathManipulator. Keeps a reference to its NodeList.
53 * - NodeList: exposes an iterator-based interface to nodes. It is possible to obtain an iterator
54 * to a node from the node. Keeps a reference to its SubpathList.
55 * - SubpathList: list of NodeLists that represents an editable pathvector. Keeps a reference
56 * to its PathManipulator.
57 * - PathManipulator: performs most of the single-path actions like reverse subpaths,
58 * delete segment, shift selection, etc. Keeps a reference to MultiPathManipulator.
59 * - MultiPathManipulator: performs additional operations for actions that are not per-path,
60 * for example node joins and segment joins. Tracks the control transforms for PMs that edit
61 * clipping paths and masks. It is more or less equivalent to ShapeEditor and in the future
62 * it might handle all shapes. Handles XML commit of actions that affect all paths or
63 * the node selection and removes PathManipulators that have no nodes left after e.g. node
64 * deletes.
65 * - ControlPointSelection: keeps track of node selection. Performs actions that require no
66 * knowledge about the path, only about the nodes, like dragging and transforms. It is not
67 * specific to nodes and can accomodate any control point derived from SelectableControlPoint.
68 * Transforms nodes in response to transform handle events.
69 * - TransformHandleSet: displays nodeset transform handles and emits transform events. The aim
70 * is to eventually use a common class for object and control point transforms.
71 *
72 * @par Plans for the future
73 * @par
74 * - MultiPathManipulator should become a generic shape editor that manages all active manipulator,
75 * more or less like the old ShapeEditor.
76 * - Knotholder should be rewritten into one manipulator class per shape, using the control point
77 * classes. Interesting features like dragging rectangle sides could be added along the way.
78 * - Better handling of clip and mask editing, particularly in response to undo.
79 * - High level refactoring of the event context hierarchy. All aspects of tools, like toolbox
80 * controls, icons, event handling should be collected in one class, though each aspect
81 * of a tool might be in an separate class for better modularity. The long term goal is to allow
82 * tools to be defined in extensions or shared library plugins.
83 */
85 namespace {
86 SPCanvasGroup *create_control_group(SPDesktop *d);
87 void ink_node_tool_class_init(InkNodeToolClass *klass);
88 void ink_node_tool_init(InkNodeTool *node_context);
89 void ink_node_tool_dispose(GObject *object);
91 void ink_node_tool_setup(SPEventContext *ec);
92 gint ink_node_tool_root_handler(SPEventContext *event_context, GdkEvent *event);
93 gint ink_node_tool_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
94 void ink_node_tool_set(SPEventContext *ec, Inkscape::Preferences::Entry *value);
96 void ink_node_tool_update_tip(InkNodeTool *nt, GdkEvent *event);
97 void ink_node_tool_selection_changed(InkNodeTool *nt, Inkscape::Selection *sel);
98 void ink_node_tool_select_area(InkNodeTool *nt, Geom::Rect const &, GdkEventButton *);
99 void ink_node_tool_select_point(InkNodeTool *nt, Geom::Point const &, GdkEventButton *);
100 void ink_node_tool_mouseover_changed(InkNodeTool *nt, Inkscape::UI::ControlPoint *p);
101 } // anonymous namespace
103 GType ink_node_tool_get_type()
104 {
105 static GType type = 0;
106 if (!type) {
107 GTypeInfo info = {
108 sizeof(InkNodeToolClass),
109 NULL, NULL,
110 (GClassInitFunc) ink_node_tool_class_init,
111 NULL, NULL,
112 sizeof(InkNodeTool),
113 4,
114 (GInstanceInitFunc) ink_node_tool_init,
115 NULL, /* value_table */
116 };
117 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "InkNodeTool", &info, (GTypeFlags)0);
118 }
119 return type;
120 }
122 namespace {
124 SPCanvasGroup *create_control_group(SPDesktop *d)
125 {
126 return reinterpret_cast<SPCanvasGroup*>(sp_canvas_item_new(
127 sp_desktop_controls(d), SP_TYPE_CANVAS_GROUP, NULL));
128 }
130 void destroy_group(SPCanvasGroup *g)
131 {
132 gtk_object_destroy(GTK_OBJECT(g));
133 }
135 void ink_node_tool_class_init(InkNodeToolClass *klass)
136 {
137 GObjectClass *object_class = (GObjectClass *) klass;
138 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
140 object_class->dispose = ink_node_tool_dispose;
142 event_context_class->setup = ink_node_tool_setup;
143 event_context_class->set = ink_node_tool_set;
144 event_context_class->root_handler = ink_node_tool_root_handler;
145 event_context_class->item_handler = ink_node_tool_item_handler;
146 }
148 void ink_node_tool_init(InkNodeTool *nt)
149 {
150 SPEventContext *event_context = SP_EVENT_CONTEXT(nt);
152 event_context->cursor_shape = cursor_node_xpm;
153 event_context->hot_x = 1;
154 event_context->hot_y = 1;
156 new (&nt->_selection_changed_connection) sigc::connection();
157 new (&nt->_selection_modified_connection) sigc::connection();
158 new (&nt->_mouseover_changed_connection) sigc::connection();
159 //new (&nt->_mgroup) Inkscape::UI::ManipulatorGroup(nt->desktop);
160 new (&nt->_selected_nodes) CSelPtr();
161 new (&nt->_multipath) MultiPathPtr();
162 new (&nt->_selector) SelectorPtr();
163 new (&nt->_path_data) PathSharedDataPtr();
164 }
166 void ink_node_tool_dispose(GObject *object)
167 {
168 InkNodeTool *nt = INK_NODE_TOOL(object);
170 nt->enableGrDrag(false);
172 nt->_selection_changed_connection.disconnect();
173 nt->_selection_modified_connection.disconnect();
174 nt->_mouseover_changed_connection.disconnect();
175 nt->_multipath.~MultiPathPtr();
176 nt->_selected_nodes.~CSelPtr();
177 nt->_selector.~SelectorPtr();
179 Inkscape::UI::PathSharedData &data = *nt->_path_data;
180 destroy_group(data.node_data.node_group);
181 destroy_group(data.node_data.handle_group);
182 destroy_group(data.node_data.handle_line_group);
183 destroy_group(data.outline_group);
184 destroy_group(data.dragpoint_group);
185 destroy_group(nt->_transform_handle_group);
187 nt->_path_data.~PathSharedDataPtr();
188 nt->_selection_changed_connection.~connection();
189 nt->_selection_modified_connection.~connection();
190 nt->_mouseover_changed_connection.~connection();
192 if (nt->_node_message_context) {
193 delete nt->_node_message_context;
194 }
195 if (nt->shape_editor) {
196 nt->shape_editor->unset_item(SH_KNOTHOLDER);
197 delete nt->shape_editor;
198 }
200 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL)))->dispose(object);
201 }
203 void ink_node_tool_setup(SPEventContext *ec)
204 {
205 InkNodeTool *nt = INK_NODE_TOOL(ec);
207 SPEventContextClass *parent = (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
208 if (parent->setup) parent->setup(ec);
210 nt->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
212 nt->_path_data.reset(new Inkscape::UI::PathSharedData());
213 Inkscape::UI::PathSharedData &data = *nt->_path_data;
214 data.node_data.desktop = nt->desktop;
216 // selector has to be created here, so that its hidden control point is on the bottom
217 nt->_selector.reset(new Inkscape::UI::Selector(nt->desktop));
219 // Prepare canvas groups for controls. This guarantees correct z-order, so that
220 // for example a dragpoint won't obscure a node
221 data.outline_group = create_control_group(nt->desktop);
222 data.node_data.handle_line_group = create_control_group(nt->desktop);
223 data.dragpoint_group = create_control_group(nt->desktop);
224 nt->_transform_handle_group = create_control_group(nt->desktop);
225 data.node_data.node_group = create_control_group(nt->desktop);
226 data.node_data.handle_group = create_control_group(nt->desktop);
228 Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
229 nt->_selection_changed_connection.disconnect();
230 nt->_selection_changed_connection =
231 selection->connectChanged(
232 sigc::bind<0>(
233 sigc::ptr_fun(&ink_node_tool_selection_changed),
234 nt));
235 /*nt->_selection_modified_connection.disconnect();
236 nt->_selection_modified_connection =
237 selection->connectModified(
238 sigc::hide(sigc::bind<0>(
239 sigc::ptr_fun(&ink_node_tool_selection_modified),
240 nt)));*/
241 nt->_mouseover_changed_connection.disconnect();
242 nt->_mouseover_changed_connection =
243 Inkscape::UI::ControlPoint::signal_mouseover_change.connect(
244 sigc::bind<0>(
245 sigc::ptr_fun(&ink_node_tool_mouseover_changed),
246 nt));
248 nt->_selected_nodes.reset(
249 new Inkscape::UI::ControlPointSelection(nt->desktop, nt->_transform_handle_group));
250 data.node_data.selection = nt->_selected_nodes.get();
251 nt->_multipath.reset(new Inkscape::UI::MultiPathManipulator(data,
252 nt->_selection_changed_connection));
254 nt->_selector->signal_point.connect(
255 sigc::bind<0>(
256 sigc::ptr_fun(&ink_node_tool_select_point),
257 nt));
258 nt->_selector->signal_area.connect(
259 sigc::bind<0>(
260 sigc::ptr_fun(&ink_node_tool_select_area),
261 nt));
263 nt->_multipath->signal_coords_changed.connect(
264 sigc::bind(
265 sigc::mem_fun(*nt->desktop, &SPDesktop::emitToolSubselectionChanged),
266 (void*) 0));
267 nt->_selected_nodes->signal_point_changed.connect(
268 sigc::hide( sigc::hide(
269 sigc::bind(
270 sigc::bind(
271 sigc::ptr_fun(ink_node_tool_update_tip),
272 (GdkEvent*)0),
273 nt))));
275 nt->cursor_drag = false;
276 nt->show_transform_handles = true;
277 nt->single_node_transform_handles = false;
278 nt->flash_tempitem = NULL;
279 nt->flashed_item = NULL;
280 // TODO remove this!
281 nt->shape_editor = new ShapeEditor(nt->desktop);
283 // read prefs before adding items to selection to prevent momentarily showing the outline
284 sp_event_context_read(nt, "show_handles");
285 sp_event_context_read(nt, "show_outline");
286 sp_event_context_read(nt, "show_path_direction");
287 sp_event_context_read(nt, "show_transform_handles");
288 sp_event_context_read(nt, "single_node_transform_handles");
289 sp_event_context_read(nt, "edit_clipping_paths");
290 sp_event_context_read(nt, "edit_masks");
292 ink_node_tool_selection_changed(nt, selection);
293 ink_node_tool_update_tip(nt, NULL);
295 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
296 if (prefs->getBool("/tools/nodes/selcue")) {
297 ec->enableSelectionCue();
298 }
299 if (prefs->getBool("/tools/nodes/gradientdrag")) {
300 ec->enableGrDrag();
301 }
303 nt->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
304 }
306 void ink_node_tool_set(SPEventContext *ec, Inkscape::Preferences::Entry *value)
307 {
308 InkNodeTool *nt = INK_NODE_TOOL(ec);
309 Glib::ustring entry_name = value->getEntryName();
311 if (entry_name == "show_handles") {
312 nt->_multipath->showHandles(value->getBool(true));
313 } else if (entry_name == "show_outline") {
314 nt->show_outline = value->getBool();
315 nt->_multipath->showOutline(nt->show_outline);
316 } else if (entry_name == "show_path_direction") {
317 nt->show_path_direction = value->getBool();
318 nt->_multipath->showPathDirection(nt->show_path_direction);
319 } else if (entry_name == "show_transform_handles") {
320 nt->show_transform_handles = value->getBool(true);
321 nt->_selected_nodes->showTransformHandles(
322 nt->show_transform_handles, nt->single_node_transform_handles);
323 } else if (entry_name == "single_node_transform_handles") {
324 nt->single_node_transform_handles = value->getBool();
325 nt->_selected_nodes->showTransformHandles(
326 nt->show_transform_handles, nt->single_node_transform_handles);
327 } else if (entry_name == "edit_clipping_paths") {
328 nt->edit_clipping_paths = value->getBool();
329 ink_node_tool_selection_changed(nt, nt->desktop->selection);
330 } else if (entry_name == "edit_masks") {
331 nt->edit_masks = value->getBool();
332 ink_node_tool_selection_changed(nt, nt->desktop->selection);
333 } else {
334 SPEventContextClass *parent_class =
335 (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
336 if (parent_class->set)
337 parent_class->set(ec, value);
338 }
339 }
341 /** Recursively collect ShapeRecords */
342 void gather_items(InkNodeTool *nt, SPItem *base, SPObject *obj, Inkscape::UI::ShapeRole role,
343 std::set<Inkscape::UI::ShapeRecord> &s)
344 {
345 using namespace Inkscape::UI;
346 if (!obj) return;
348 if (SP_IS_PATH(obj) && obj->repr->attribute("inkscape:original-d") != NULL) {
349 ShapeRecord r;
350 r.item = static_cast<SPItem*>(obj);
351 r.edit_transform = Geom::identity(); // TODO wrong?
352 r.role = SHAPE_ROLE_LPE_PARAM;
353 s.insert(r);
354 } else if (role != SHAPE_ROLE_NORMAL && (SP_IS_GROUP(obj) || SP_IS_OBJECTGROUP(obj))) {
355 for (SPObject *c = obj->children; c; c = c->next) {
356 gather_items(nt, base, c, role, s);
357 }
358 } else if (SP_IS_ITEM(obj)) {
359 SPItem *item = static_cast<SPItem*>(obj);
360 ShapeRecord r;
361 r.item = item;
362 // TODO add support for objectBoundingBox
363 r.edit_transform = base ? sp_item_i2doc_affine(base) : Geom::identity();
364 r.role = role;
365 if (s.insert(r).second) {
366 // this item was encountered the first time
367 if (nt->edit_clipping_paths && item->clip_ref) {
368 gather_items(nt, item, item->clip_ref->getObject(), SHAPE_ROLE_CLIPPING_PATH, s);
369 }
370 if (nt->edit_masks && item->mask_ref) {
371 gather_items(nt, item, item->mask_ref->getObject(), SHAPE_ROLE_MASK, s);
372 }
373 }
374 }
375 }
377 struct IsPath {
378 bool operator()(SPItem *i) const { return SP_IS_PATH(i); }
379 };
381 void ink_node_tool_selection_changed(InkNodeTool *nt, Inkscape::Selection *sel)
382 {
383 using namespace Inkscape::UI;
385 std::set<ShapeRecord> shapes;
387 // TODO this is ugly!!!
388 //typedef std::map<SPItem*, std::pair<Geom::Matrix, guint32> > TransMap;
389 //typedef std::map<SPPath*, std::pair<Geom::Matrix, guint32> > PathMap;
390 GSList const *ilist = sel->itemList();
392 for (GSList *i = const_cast<GSList*>(ilist); i; i = i->next) {
393 SPObject *obj = static_cast<SPObject*>(i->data);
394 if (SP_IS_ITEM(obj)) {
395 gather_items(nt, NULL, static_cast<SPItem*>(obj), SHAPE_ROLE_NORMAL, shapes);
396 }
397 }
399 // ugly hack: set the first editable non-path item for knotholder
400 // maybe use multiple ShapeEditors for now, to allow editing many shapes at once?
401 bool something_set = false;
402 for (std::set<ShapeRecord>::iterator i = shapes.begin(); i != shapes.end(); ++i) {
403 ShapeRecord const &r = *i;
404 if (SP_IS_SHAPE(r.item) && !SP_IS_PATH(r.item)) {
405 nt->shape_editor->set_item(r.item, SH_KNOTHOLDER);
406 something_set = true;
407 break;
408 }
409 }
410 if (!something_set) {
411 nt->shape_editor->unset_item(SH_KNOTHOLDER);
412 }
414 nt->_multipath->setItems(shapes);
415 ink_node_tool_update_tip(nt, NULL);
416 nt->desktop->updateNow();
417 }
419 gint ink_node_tool_root_handler(SPEventContext *event_context, GdkEvent *event)
420 {
421 /* things to handle here:
422 * 1. selection of items
423 * 2. passing events to manipulators
424 * 3. some keybindings
425 */
426 using namespace Inkscape::UI; // pull in event helpers
428 SPDesktop *desktop = event_context->desktop;
429 Inkscape::Selection *selection = desktop->selection;
430 InkNodeTool *nt = static_cast<InkNodeTool*>(event_context);
431 static Inkscape::Preferences *prefs = Inkscape::Preferences::get();
433 if (nt->_multipath->event(event)) return true;
434 if (nt->_selector->event(event)) return true;
435 if (nt->_selected_nodes->event(event)) return true;
437 switch (event->type)
438 {
439 case GDK_MOTION_NOTIFY:
440 // create outline
441 if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
442 SPItem *over_item = sp_event_context_find_item (desktop, event_point(event->button),
443 FALSE, TRUE);
444 if (over_item == nt->flashed_item) break;
445 if (!prefs->getBool("/tools/nodes/pathflash_selected") && selection->includes(over_item)) break;
446 if (nt->flash_tempitem) {
447 desktop->remove_temporary_canvasitem(nt->flash_tempitem);
448 nt->flash_tempitem = NULL;
449 nt->flashed_item = NULL;
450 }
451 if (!SP_IS_PATH(over_item)) break; // for now, handle only paths
453 nt->flashed_item = over_item;
454 SPCurve *c = sp_path_get_curve_for_edit(SP_PATH(over_item));
455 c->transform(sp_item_i2d_affine(over_item));
456 SPCanvasItem *flash = sp_canvas_bpath_new(sp_desktop_tempgroup(desktop), c);
457 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(flash),
458 prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff), 1.0,
459 SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
460 sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(flash), 0, SP_WIND_RULE_NONZERO);
461 nt->flash_tempitem = desktop->add_temporary_canvasitem(flash,
462 prefs->getInt("/tools/nodes/pathflash_timeout", 500));
463 c->unref();
464 }
465 return true;
466 case GDK_KEY_PRESS:
467 switch (get_group0_keyval(&event->key))
468 {
469 case GDK_Escape: // deselect everything
470 if (nt->_selected_nodes->empty()) {
471 selection->clear();
472 } else {
473 nt->_selected_nodes->clear();
474 }
475 ink_node_tool_update_tip(nt, event);
476 return TRUE;
477 case GDK_a:
478 if (held_control(event->key)) {
479 if (held_alt(event->key)) {
480 nt->_multipath->selectAll();
481 } else {
482 // select all nodes in subpaths that have something selected
483 // if nothing is selected, select everything
484 nt->_multipath->selectSubpaths();
485 }
486 ink_node_tool_update_tip(nt, event);
487 return TRUE;
488 }
489 break;
490 default:
491 break;
492 }
493 ink_node_tool_update_tip(nt, event);
494 break;
495 case GDK_KEY_RELEASE:
496 ink_node_tool_update_tip(nt, event);
497 break;
498 default: break;
499 }
501 SPEventContextClass *parent_class = (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
502 if (parent_class->root_handler)
503 return parent_class->root_handler(event_context, event);
504 return FALSE;
505 }
507 void ink_node_tool_update_tip(InkNodeTool *nt, GdkEvent *event)
508 {
509 using namespace Inkscape::UI;
510 if (event && (event->type == GDK_KEY_PRESS || event->type == GDK_KEY_RELEASE)) {
511 unsigned new_state = state_after_event(event);
512 if (new_state == event->key.state) return;
513 if (state_held_shift(new_state)) {
514 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE,
515 C_("Node tool tip", "<b>Shift:</b> drag to add nodes to the selection, "
516 "click to toggle object selection"));
517 return;
518 }
519 }
520 unsigned sz = nt->_selected_nodes->size();
521 if (sz != 0) {
522 char *dyntip = g_strdup_printf(C_("Node tool tip",
523 "Selected <b>%d nodes</b>. Drag to select nodes, click to select a single object "
524 "or unselect all objects"), sz);
525 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, dyntip);
526 g_free(dyntip);
527 } else if (nt->_multipath->empty()) {
528 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE,
529 C_("Node tool tip", "Drag or click to select objects to edit"));
530 } else {
531 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE,
532 C_("Node tool tip", "Drag to select nodes, click to select an object "
533 "or clear the selection"));
534 }
535 }
537 gint ink_node_tool_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
538 {
539 SPEventContextClass *parent_class =
540 (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
541 if (parent_class->item_handler)
542 return parent_class->item_handler(event_context, item, event);
543 return FALSE;
544 }
546 void ink_node_tool_select_area(InkNodeTool *nt, Geom::Rect const &sel, GdkEventButton *event)
547 {
548 using namespace Inkscape::UI;
549 if (nt->_multipath->empty()) {
550 // if multipath is empty, select rubberbanded items rather than nodes
551 Inkscape::Selection *selection = nt->desktop->selection;
552 GSList *items = sp_document_items_in_box(
553 sp_desktop_document(nt->desktop), nt->desktop->dkey, sel);
554 selection->setList(items);
555 g_slist_free(items);
556 } else {
557 nt->_multipath->selectArea(sel, !held_shift(*event));
558 }
559 }
560 void ink_node_tool_select_point(InkNodeTool *nt, Geom::Point const &sel, GdkEventButton *event)
561 {
562 using namespace Inkscape::UI; // pull in event helpers
563 if (!event) return;
564 if (event->button != 1) return;
566 Inkscape::Selection *selection = nt->desktop->selection;
568 SPItem *item_clicked = sp_event_context_find_item (nt->desktop, event_point(*event),
569 (event->state & GDK_MOD1_MASK) && !(event->state & GDK_CONTROL_MASK), TRUE);
571 if (item_clicked == NULL) { // nothing under cursor
572 // if no Shift, deselect
573 if (!(event->state & GDK_SHIFT_MASK)) {
574 selection->clear();
575 }
576 return;
577 }
578 if (held_shift(*event)) {
579 selection->toggle(item_clicked);
580 } else {
581 selection->set(item_clicked);
582 }
583 nt->desktop->updateNow();
584 }
586 void ink_node_tool_mouseover_changed(InkNodeTool *nt, Inkscape::UI::ControlPoint *p)
587 {
588 using Inkscape::UI::CurveDragPoint;
589 CurveDragPoint *cdp = dynamic_cast<CurveDragPoint*>(p);
590 if (cdp && !nt->cursor_drag) {
591 nt->cursor_shape = cursor_node_d_xpm;
592 nt->hot_x = 1;
593 nt->hot_y = 1;
594 sp_event_context_update_cursor(nt);
595 nt->cursor_drag = true;
596 } else if (!cdp && nt->cursor_drag) {
597 nt->cursor_shape = cursor_node_xpm;
598 nt->hot_x = 1;
599 nt->hot_y = 1;
600 sp_event_context_update_cursor(nt);
601 nt->cursor_drag = false;
602 }
603 }
605 } // anonymous namespace
607 /*
608 Local Variables:
609 mode:c++
610 c-file-style:"stroustrup"
611 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
612 indent-tabs-mode:nil
613 fill-column:99
614 End:
615 */
616 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :