092ce7d872e48da70dca6dd3aad1d83e5f9fbbbd
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 and a set of nodes that can potentially
66 * be selected. There can be more than one selection. Performs actions that require no
67 * knowledge about the path, only about the nodes, like dragging and transforms. It is not
68 * specific to nodes and can accomodate any control point derived from SelectableControlPoint.
69 * Transforms nodes in response to transform handle events.
70 * - TransformHandleSet: displays nodeset transform handles and emits transform events. The aim
71 * is to eventually use a common class for object and control point transforms.
72 * - SelectableControlPoint: base for any type of selectable point. It can belong to only one
73 * selection.
74 *
75 * @par Plans for the future
76 * @par
77 * - MultiPathManipulator should become a generic shape editor that manages all active manipulator,
78 * more or less like the old ShapeEditor.
79 * - Knotholder should be rewritten into one manipulator class per shape, using the control point
80 * classes. Interesting features like dragging rectangle sides could be added along the way.
81 * - Better handling of clip and mask editing, particularly in response to undo.
82 * - High level refactoring of the event context hierarchy. All aspects of tools, like toolbox
83 * controls, icons, event handling should be collected in one class, though each aspect
84 * of a tool might be in an separate class for better modularity. The long term goal is to allow
85 * tools to be defined in extensions or shared library plugins.
86 */
88 namespace {
89 SPCanvasGroup *create_control_group(SPDesktop *d);
90 void ink_node_tool_class_init(InkNodeToolClass *klass);
91 void ink_node_tool_init(InkNodeTool *node_context);
92 void ink_node_tool_dispose(GObject *object);
94 void ink_node_tool_setup(SPEventContext *ec);
95 gint ink_node_tool_root_handler(SPEventContext *event_context, GdkEvent *event);
96 gint ink_node_tool_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
97 void ink_node_tool_set(SPEventContext *ec, Inkscape::Preferences::Entry *value);
99 void ink_node_tool_update_tip(InkNodeTool *nt, GdkEvent *event);
100 void ink_node_tool_selection_changed(InkNodeTool *nt, Inkscape::Selection *sel);
101 void ink_node_tool_select_area(InkNodeTool *nt, Geom::Rect const &, GdkEventButton *);
102 void ink_node_tool_select_point(InkNodeTool *nt, Geom::Point const &, GdkEventButton *);
103 void ink_node_tool_mouseover_changed(InkNodeTool *nt, Inkscape::UI::ControlPoint *p);
104 } // anonymous namespace
106 GType ink_node_tool_get_type()
107 {
108 static GType type = 0;
109 if (!type) {
110 GTypeInfo info = {
111 sizeof(InkNodeToolClass),
112 NULL, NULL,
113 (GClassInitFunc) ink_node_tool_class_init,
114 NULL, NULL,
115 sizeof(InkNodeTool),
116 4,
117 (GInstanceInitFunc) ink_node_tool_init,
118 NULL, /* value_table */
119 };
120 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "InkNodeTool", &info, (GTypeFlags)0);
121 }
122 return type;
123 }
125 namespace {
127 SPCanvasGroup *create_control_group(SPDesktop *d)
128 {
129 return reinterpret_cast<SPCanvasGroup*>(sp_canvas_item_new(
130 sp_desktop_controls(d), SP_TYPE_CANVAS_GROUP, NULL));
131 }
133 void destroy_group(SPCanvasGroup *g)
134 {
135 gtk_object_destroy(GTK_OBJECT(g));
136 }
138 void ink_node_tool_class_init(InkNodeToolClass *klass)
139 {
140 GObjectClass *object_class = (GObjectClass *) klass;
141 SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
143 object_class->dispose = ink_node_tool_dispose;
145 event_context_class->setup = ink_node_tool_setup;
146 event_context_class->set = ink_node_tool_set;
147 event_context_class->root_handler = ink_node_tool_root_handler;
148 event_context_class->item_handler = ink_node_tool_item_handler;
149 }
151 void ink_node_tool_init(InkNodeTool *nt)
152 {
153 SPEventContext *event_context = SP_EVENT_CONTEXT(nt);
155 event_context->cursor_shape = cursor_node_xpm;
156 event_context->hot_x = 1;
157 event_context->hot_y = 1;
159 new (&nt->_selection_changed_connection) sigc::connection();
160 new (&nt->_selection_modified_connection) sigc::connection();
161 new (&nt->_mouseover_changed_connection) sigc::connection();
162 //new (&nt->_mgroup) Inkscape::UI::ManipulatorGroup(nt->desktop);
163 new (&nt->_selected_nodes) CSelPtr();
164 new (&nt->_multipath) MultiPathPtr();
165 new (&nt->_selector) SelectorPtr();
166 new (&nt->_path_data) PathSharedDataPtr();
167 }
169 void ink_node_tool_dispose(GObject *object)
170 {
171 InkNodeTool *nt = INK_NODE_TOOL(object);
173 nt->enableGrDrag(false);
175 nt->_selection_changed_connection.disconnect();
176 nt->_selection_modified_connection.disconnect();
177 nt->_mouseover_changed_connection.disconnect();
178 nt->_multipath.~MultiPathPtr();
179 nt->_selected_nodes.~CSelPtr();
180 nt->_selector.~SelectorPtr();
182 Inkscape::UI::PathSharedData &data = *nt->_path_data;
183 destroy_group(data.node_data.node_group);
184 destroy_group(data.node_data.handle_group);
185 destroy_group(data.node_data.handle_line_group);
186 destroy_group(data.outline_group);
187 destroy_group(data.dragpoint_group);
188 destroy_group(nt->_transform_handle_group);
190 nt->_path_data.~PathSharedDataPtr();
191 nt->_selection_changed_connection.~connection();
192 nt->_selection_modified_connection.~connection();
193 nt->_mouseover_changed_connection.~connection();
195 if (nt->_node_message_context) {
196 delete nt->_node_message_context;
197 }
198 if (nt->shape_editor) {
199 nt->shape_editor->unset_item(SH_KNOTHOLDER);
200 delete nt->shape_editor;
201 }
203 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL)))->dispose(object);
204 }
206 void ink_node_tool_setup(SPEventContext *ec)
207 {
208 InkNodeTool *nt = INK_NODE_TOOL(ec);
210 SPEventContextClass *parent = (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
211 if (parent->setup) parent->setup(ec);
213 nt->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
215 nt->_path_data.reset(new Inkscape::UI::PathSharedData());
216 Inkscape::UI::PathSharedData &data = *nt->_path_data;
217 data.node_data.desktop = nt->desktop;
219 // selector has to be created here, so that its hidden control point is on the bottom
220 nt->_selector.reset(new Inkscape::UI::Selector(nt->desktop));
222 // Prepare canvas groups for controls. This guarantees correct z-order, so that
223 // for example a dragpoint won't obscure a node
224 data.outline_group = create_control_group(nt->desktop);
225 data.node_data.handle_line_group = create_control_group(nt->desktop);
226 data.dragpoint_group = create_control_group(nt->desktop);
227 nt->_transform_handle_group = create_control_group(nt->desktop);
228 data.node_data.node_group = create_control_group(nt->desktop);
229 data.node_data.handle_group = create_control_group(nt->desktop);
231 Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
232 nt->_selection_changed_connection.disconnect();
233 nt->_selection_changed_connection =
234 selection->connectChanged(
235 sigc::bind<0>(
236 sigc::ptr_fun(&ink_node_tool_selection_changed),
237 nt));
238 /*nt->_selection_modified_connection.disconnect();
239 nt->_selection_modified_connection =
240 selection->connectModified(
241 sigc::hide(sigc::bind<0>(
242 sigc::ptr_fun(&ink_node_tool_selection_modified),
243 nt)));*/
244 nt->_mouseover_changed_connection.disconnect();
245 nt->_mouseover_changed_connection =
246 Inkscape::UI::ControlPoint::signal_mouseover_change.connect(
247 sigc::bind<0>(
248 sigc::ptr_fun(&ink_node_tool_mouseover_changed),
249 nt));
251 nt->_selected_nodes.reset(
252 new Inkscape::UI::ControlPointSelection(nt->desktop, nt->_transform_handle_group));
253 data.node_data.selection = nt->_selected_nodes.get();
254 nt->_multipath.reset(new Inkscape::UI::MultiPathManipulator(data,
255 nt->_selection_changed_connection));
257 nt->_selector->signal_point.connect(
258 sigc::bind<0>(
259 sigc::ptr_fun(&ink_node_tool_select_point),
260 nt));
261 nt->_selector->signal_area.connect(
262 sigc::bind<0>(
263 sigc::ptr_fun(&ink_node_tool_select_area),
264 nt));
266 nt->_multipath->signal_coords_changed.connect(
267 sigc::bind(
268 sigc::mem_fun(*nt->desktop, &SPDesktop::emitToolSubselectionChanged),
269 (void*) 0));
270 nt->_selected_nodes->signal_point_changed.connect(
271 sigc::hide( sigc::hide(
272 sigc::bind(
273 sigc::bind(
274 sigc::ptr_fun(ink_node_tool_update_tip),
275 (GdkEvent*)0),
276 nt))));
278 nt->cursor_drag = false;
279 nt->show_transform_handles = true;
280 nt->single_node_transform_handles = false;
281 nt->flash_tempitem = NULL;
282 nt->flashed_item = NULL;
283 // TODO remove this!
284 nt->shape_editor = new ShapeEditor(nt->desktop);
286 // read prefs before adding items to selection to prevent momentarily showing the outline
287 sp_event_context_read(nt, "show_handles");
288 sp_event_context_read(nt, "show_outline");
289 sp_event_context_read(nt, "show_path_direction");
290 sp_event_context_read(nt, "show_transform_handles");
291 sp_event_context_read(nt, "single_node_transform_handles");
292 sp_event_context_read(nt, "edit_clipping_paths");
293 sp_event_context_read(nt, "edit_masks");
295 ink_node_tool_selection_changed(nt, selection);
296 ink_node_tool_update_tip(nt, NULL);
298 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
299 if (prefs->getBool("/tools/nodes/selcue")) {
300 ec->enableSelectionCue();
301 }
302 if (prefs->getBool("/tools/nodes/gradientdrag")) {
303 ec->enableGrDrag();
304 }
306 nt->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
307 }
309 void ink_node_tool_set(SPEventContext *ec, Inkscape::Preferences::Entry *value)
310 {
311 InkNodeTool *nt = INK_NODE_TOOL(ec);
312 Glib::ustring entry_name = value->getEntryName();
314 if (entry_name == "show_handles") {
315 nt->_multipath->showHandles(value->getBool(true));
316 } else if (entry_name == "show_outline") {
317 nt->show_outline = value->getBool();
318 nt->_multipath->showOutline(nt->show_outline);
319 } else if (entry_name == "show_path_direction") {
320 nt->show_path_direction = value->getBool();
321 nt->_multipath->showPathDirection(nt->show_path_direction);
322 } else if (entry_name == "show_transform_handles") {
323 nt->show_transform_handles = value->getBool(true);
324 nt->_selected_nodes->showTransformHandles(
325 nt->show_transform_handles, nt->single_node_transform_handles);
326 } else if (entry_name == "single_node_transform_handles") {
327 nt->single_node_transform_handles = value->getBool();
328 nt->_selected_nodes->showTransformHandles(
329 nt->show_transform_handles, nt->single_node_transform_handles);
330 } else if (entry_name == "edit_clipping_paths") {
331 nt->edit_clipping_paths = value->getBool();
332 ink_node_tool_selection_changed(nt, nt->desktop->selection);
333 } else if (entry_name == "edit_masks") {
334 nt->edit_masks = value->getBool();
335 ink_node_tool_selection_changed(nt, nt->desktop->selection);
336 } else {
337 SPEventContextClass *parent_class =
338 (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
339 if (parent_class->set)
340 parent_class->set(ec, value);
341 }
342 }
344 /** Recursively collect ShapeRecords */
345 void gather_items(InkNodeTool *nt, SPItem *base, SPObject *obj, Inkscape::UI::ShapeRole role,
346 std::set<Inkscape::UI::ShapeRecord> &s)
347 {
348 using namespace Inkscape::UI;
349 if (!obj) return;
351 if (SP_IS_PATH(obj) && obj->repr->attribute("inkscape:original-d") != NULL) {
352 ShapeRecord r;
353 r.item = static_cast<SPItem*>(obj);
354 r.edit_transform = Geom::identity(); // TODO wrong?
355 r.role = SHAPE_ROLE_LPE_PARAM;
356 s.insert(r);
357 } else if (role != SHAPE_ROLE_NORMAL && (SP_IS_GROUP(obj) || SP_IS_OBJECTGROUP(obj))) {
358 for (SPObject *c = obj->children; c; c = c->next) {
359 gather_items(nt, base, c, role, s);
360 }
361 } else if (SP_IS_ITEM(obj)) {
362 SPItem *item = static_cast<SPItem*>(obj);
363 ShapeRecord r;
364 r.item = item;
365 // TODO add support for objectBoundingBox
366 r.edit_transform = base ? sp_item_i2doc_affine(base) : Geom::identity();
367 r.role = role;
368 if (s.insert(r).second) {
369 // this item was encountered the first time
370 if (nt->edit_clipping_paths && item->clip_ref) {
371 gather_items(nt, item, item->clip_ref->getObject(), SHAPE_ROLE_CLIPPING_PATH, s);
372 }
373 if (nt->edit_masks && item->mask_ref) {
374 gather_items(nt, item, item->mask_ref->getObject(), SHAPE_ROLE_MASK, s);
375 }
376 }
377 }
378 }
380 struct IsPath {
381 bool operator()(SPItem *i) const { return SP_IS_PATH(i); }
382 };
384 void ink_node_tool_selection_changed(InkNodeTool *nt, Inkscape::Selection *sel)
385 {
386 using namespace Inkscape::UI;
388 std::set<ShapeRecord> shapes;
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->_selected_nodes->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 if (!held_shift(*event)) nt->_selected_nodes->clear();
558 nt->_selected_nodes->selectArea(sel);
559 }
560 }
561 void ink_node_tool_select_point(InkNodeTool *nt, Geom::Point const &/*sel*/, GdkEventButton *event)
562 {
563 using namespace Inkscape::UI; // pull in event helpers
564 if (!event) return;
565 if (event->button != 1) return;
567 Inkscape::Selection *selection = nt->desktop->selection;
569 SPItem *item_clicked = sp_event_context_find_item (nt->desktop, event_point(*event),
570 (event->state & GDK_MOD1_MASK) && !(event->state & GDK_CONTROL_MASK), TRUE);
572 if (item_clicked == NULL) { // nothing under cursor
573 // if no Shift, deselect
574 if (!(event->state & GDK_SHIFT_MASK)) {
575 selection->clear();
576 }
577 } else {
578 if (held_shift(*event)) {
579 selection->toggle(item_clicked);
580 } else {
581 selection->set(item_clicked);
582 }
583 nt->desktop->updateNow();
584 }
585 }
587 void ink_node_tool_mouseover_changed(InkNodeTool *nt, Inkscape::UI::ControlPoint *p)
588 {
589 using Inkscape::UI::CurveDragPoint;
590 CurveDragPoint *cdp = dynamic_cast<CurveDragPoint*>(p);
591 if (cdp && !nt->cursor_drag) {
592 nt->cursor_shape = cursor_node_d_xpm;
593 nt->hot_x = 1;
594 nt->hot_y = 1;
595 sp_event_context_update_cursor(nt);
596 nt->cursor_drag = true;
597 } else if (!cdp && nt->cursor_drag) {
598 nt->cursor_shape = cursor_node_xpm;
599 nt->hot_x = 1;
600 nt->hot_y = 1;
601 sp_event_context_update_cursor(nt);
602 nt->cursor_drag = false;
603 }
604 }
606 } // anonymous namespace
608 /*
609 Local Variables:
610 mode:c++
611 c-file-style:"stroustrup"
612 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
613 indent-tabs-mode:nil
614 fill-column:99
615 End:
616 */
617 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :