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 nt->_last_over = NULL;
284 // TODO long term, fold ShapeEditor into MultiPathManipulator and rename MPM
285 // to something better
286 nt->shape_editor = new ShapeEditor(nt->desktop);
288 // read prefs before adding items to selection to prevent momentarily showing the outline
289 sp_event_context_read(nt, "show_handles");
290 sp_event_context_read(nt, "show_outline");
291 sp_event_context_read(nt, "live_outline");
292 sp_event_context_read(nt, "live_objects");
293 sp_event_context_read(nt, "show_path_direction");
294 sp_event_context_read(nt, "show_transform_handles");
295 sp_event_context_read(nt, "single_node_transform_handles");
296 sp_event_context_read(nt, "edit_clipping_paths");
297 sp_event_context_read(nt, "edit_masks");
299 ink_node_tool_selection_changed(nt, selection);
300 ink_node_tool_update_tip(nt, NULL);
302 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
303 if (prefs->getBool("/tools/nodes/selcue")) {
304 ec->enableSelectionCue();
305 }
306 if (prefs->getBool("/tools/nodes/gradientdrag")) {
307 ec->enableGrDrag();
308 }
310 nt->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
311 }
313 void ink_node_tool_set(SPEventContext *ec, Inkscape::Preferences::Entry *value)
314 {
315 InkNodeTool *nt = INK_NODE_TOOL(ec);
316 Glib::ustring entry_name = value->getEntryName();
318 if (entry_name == "show_handles") {
319 nt->show_handles = value->getBool(true);
320 nt->_multipath->showHandles(nt->show_handles);
321 } else if (entry_name == "show_outline") {
322 nt->show_outline = value->getBool();
323 nt->_multipath->showOutline(nt->show_outline);
324 } else if (entry_name == "live_outline") {
325 nt->live_outline = value->getBool();
326 nt->_multipath->setLiveOutline(nt->live_outline);
327 } else if (entry_name == "live_objects") {
328 nt->live_objects = value->getBool();
329 nt->_multipath->setLiveObjects(nt->live_objects);
330 } else if (entry_name == "show_path_direction") {
331 nt->show_path_direction = value->getBool();
332 nt->_multipath->showPathDirection(nt->show_path_direction);
333 } else if (entry_name == "show_transform_handles") {
334 nt->show_transform_handles = value->getBool(true);
335 nt->_selected_nodes->showTransformHandles(
336 nt->show_transform_handles, nt->single_node_transform_handles);
337 } else if (entry_name == "single_node_transform_handles") {
338 nt->single_node_transform_handles = value->getBool();
339 nt->_selected_nodes->showTransformHandles(
340 nt->show_transform_handles, nt->single_node_transform_handles);
341 } else if (entry_name == "edit_clipping_paths") {
342 nt->edit_clipping_paths = value->getBool();
343 ink_node_tool_selection_changed(nt, nt->desktop->selection);
344 } else if (entry_name == "edit_masks") {
345 nt->edit_masks = value->getBool();
346 ink_node_tool_selection_changed(nt, nt->desktop->selection);
347 } else {
348 SPEventContextClass *parent_class =
349 (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
350 if (parent_class->set)
351 parent_class->set(ec, value);
352 }
353 }
355 /** Recursively collect ShapeRecords */
356 void gather_items(InkNodeTool *nt, SPItem *base, SPObject *obj, Inkscape::UI::ShapeRole role,
357 std::set<Inkscape::UI::ShapeRecord> &s)
358 {
359 using namespace Inkscape::UI;
360 if (!obj) return;
362 if (SP_IS_PATH(obj) && obj->repr->attribute("inkscape:original-d") != NULL) {
363 ShapeRecord r;
364 r.item = static_cast<SPItem*>(obj);
365 r.edit_transform = Geom::identity(); // TODO wrong?
366 r.role = role;
367 s.insert(r);
368 } else if (role != SHAPE_ROLE_NORMAL && (SP_IS_GROUP(obj) || SP_IS_OBJECTGROUP(obj))) {
369 for (SPObject *c = obj->children; c; c = c->next) {
370 gather_items(nt, base, c, role, s);
371 }
372 } else if (SP_IS_ITEM(obj)) {
373 SPItem *item = static_cast<SPItem*>(obj);
374 ShapeRecord r;
375 r.item = item;
376 // TODO add support for objectBoundingBox
377 r.edit_transform = base ? sp_item_i2doc_affine(base) : Geom::identity();
378 r.role = role;
379 if (s.insert(r).second) {
380 // this item was encountered the first time
381 if (nt->edit_clipping_paths && item->clip_ref) {
382 gather_items(nt, item, item->clip_ref->getObject(), SHAPE_ROLE_CLIPPING_PATH, s);
383 }
384 if (nt->edit_masks && item->mask_ref) {
385 gather_items(nt, item, item->mask_ref->getObject(), SHAPE_ROLE_MASK, s);
386 }
387 }
388 }
389 }
391 void ink_node_tool_selection_changed(InkNodeTool *nt, Inkscape::Selection *sel)
392 {
393 using namespace Inkscape::UI;
395 std::set<ShapeRecord> shapes;
397 GSList const *ilist = sel->itemList();
399 for (GSList *i = const_cast<GSList*>(ilist); i; i = i->next) {
400 SPObject *obj = static_cast<SPObject*>(i->data);
401 if (SP_IS_ITEM(obj)) {
402 gather_items(nt, NULL, static_cast<SPItem*>(obj), SHAPE_ROLE_NORMAL, shapes);
403 }
404 }
406 // ugly hack: set the first editable non-path item for knotholder
407 // maybe use multiple ShapeEditors for now, to allow editing many shapes at once?
408 bool something_set = false;
409 for (std::set<ShapeRecord>::iterator i = shapes.begin(); i != shapes.end(); ++i) {
410 ShapeRecord const &r = *i;
411 if (SP_IS_SHAPE(r.item) ||
412 (SP_IS_PATH(r.item) && r.item->repr->attribute("inkscape:original-d") != NULL))
413 {
414 nt->shape_editor->set_item(r.item, SH_KNOTHOLDER);
415 something_set = true;
416 break;
417 }
418 }
419 if (!something_set) {
420 nt->shape_editor->unset_item(SH_KNOTHOLDER);
421 }
423 nt->_multipath->setItems(shapes);
424 ink_node_tool_update_tip(nt, NULL);
425 nt->desktop->updateNow();
426 }
428 gint ink_node_tool_root_handler(SPEventContext *event_context, GdkEvent *event)
429 {
430 /* things to handle here:
431 * 1. selection of items
432 * 2. passing events to manipulators
433 * 3. some keybindings
434 */
435 using namespace Inkscape::UI; // pull in event helpers
437 SPDesktop *desktop = event_context->desktop;
438 Inkscape::Selection *selection = desktop->selection;
439 InkNodeTool *nt = static_cast<InkNodeTool*>(event_context);
440 static Inkscape::Preferences *prefs = Inkscape::Preferences::get();
442 if (nt->_multipath->event(event)) return true;
443 if (nt->_selector->event(event)) return true;
444 if (nt->_selected_nodes->event(event)) return true;
446 switch (event->type)
447 {
448 case GDK_MOTION_NOTIFY: {
449 combine_motion_events(desktop->canvas, event->motion, 0);
450 SPItem *over_item = sp_event_context_find_item (desktop, event_point(event->button),
451 FALSE, TRUE);
452 if (over_item != nt->_last_over) {
453 nt->_last_over = over_item;
454 ink_node_tool_update_tip(nt, event);
455 }
457 // create pathflash outline
458 if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
459 if (over_item == nt->flashed_item) break;
460 if (!prefs->getBool("/tools/nodes/pathflash_selected") && selection->includes(over_item)) break;
461 if (nt->flash_tempitem) {
462 desktop->remove_temporary_canvasitem(nt->flash_tempitem);
463 nt->flash_tempitem = NULL;
464 nt->flashed_item = NULL;
465 }
466 if (!SP_IS_PATH(over_item)) break; // for now, handle only paths
468 nt->flashed_item = over_item;
469 SPCurve *c = sp_path_get_curve_for_edit(SP_PATH(over_item));
470 c->transform(sp_item_i2d_affine(over_item));
471 SPCanvasItem *flash = sp_canvas_bpath_new(sp_desktop_tempgroup(desktop), c);
472 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(flash),
473 prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff), 1.0,
474 SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
475 sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(flash), 0, SP_WIND_RULE_NONZERO);
476 nt->flash_tempitem = desktop->add_temporary_canvasitem(flash,
477 prefs->getInt("/tools/nodes/pathflash_timeout", 500));
478 c->unref();
479 }
480 } break; // do not return true, because we need to pass this event to the parent context
481 // otherwise some features cease to work
483 case GDK_KEY_PRESS:
484 switch (get_group0_keyval(&event->key))
485 {
486 case GDK_Escape: // deselect everything
487 if (nt->_selected_nodes->empty()) {
488 selection->clear();
489 } else {
490 nt->_selected_nodes->clear();
491 }
492 ink_node_tool_update_tip(nt, event);
493 return TRUE;
494 case GDK_a:
495 case GDK_A:
496 if (held_control(event->key) && held_alt(event->key)) {
497 nt->_selected_nodes->selectAll();
498 // Ctrl+A is handled in selection-chemistry.cpp via verb
499 ink_node_tool_update_tip(nt, event);
500 return TRUE;
501 }
502 break;
503 case GDK_h:
504 case GDK_H:
505 if (held_only_control(event->key)) {
506 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
507 prefs->setBool("/tools/nodes/show_handles", !nt->show_handles);
508 return TRUE;
509 }
510 break;
511 default:
512 break;
513 }
514 ink_node_tool_update_tip(nt, event);
515 break;
516 case GDK_KEY_RELEASE:
517 ink_node_tool_update_tip(nt, event);
518 break;
519 default: break;
520 }
522 SPEventContextClass *parent_class = (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
523 if (parent_class->root_handler)
524 return parent_class->root_handler(event_context, event);
525 return FALSE;
526 }
528 void ink_node_tool_update_tip(InkNodeTool *nt, GdkEvent *event)
529 {
530 using namespace Inkscape::UI;
531 if (event && (event->type == GDK_KEY_PRESS || event->type == GDK_KEY_RELEASE)) {
532 unsigned new_state = state_after_event(event);
533 if (new_state == event->key.state) return;
534 if (state_held_shift(new_state)) {
535 if (nt->_last_over) {
536 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE,
537 C_("Node tool tip", "<b>Shift:</b> drag to add nodes to the selection, "
538 "click to toggle object selection"));
539 } else {
540 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE,
541 C_("Node tool tip", "<b>Shift:</b> drag to add nodes to the selection"));
542 }
543 return;
544 }
545 }
546 unsigned sz = nt->_selected_nodes->size();
547 unsigned total = nt->_selected_nodes->allPoints().size();
548 if (sz != 0) {
549 if (nt->_last_over) {
550 char *dyntip = g_strdup_printf(C_("Node tool tip",
551 "<b>%u of %u nodes</b> selected. "
552 "Drag to select nodes, click to edit only this object (more: Shift)"), sz, total);
553 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, dyntip);
554 g_free(dyntip);
555 } else {
556 char *dyntip = g_strdup_printf(C_("Node tool tip",
557 "<b>%u of %u nodes</b> selected. "
558 "Drag to select nodes, click clear the selection"), sz, total);
559 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, dyntip);
560 g_free(dyntip);
561 }
562 } else if (!nt->_multipath->empty()) {
563 if (nt->_last_over) {
564 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, C_("Node tool tip",
565 "Drag to select nodes, click to edit only this object"));
566 } else {
567 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, C_("Node tool tip",
568 "Drag to select nodes, click to clear the selection"));
569 }
570 } else {
571 if (nt->_last_over) {
572 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, C_("Node tool tip",
573 "Drag to select objects to edit, click to edit this object (more: Shift)"));
574 } else {
575 nt->_node_message_context->set(Inkscape::NORMAL_MESSAGE, C_("Node tool tip",
576 "Drag to select objects to edit"));
577 }
578 }
579 }
581 gint ink_node_tool_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
582 {
583 SPEventContextClass *parent_class =
584 (SPEventContextClass *) g_type_class_peek(g_type_parent(INK_TYPE_NODE_TOOL));
585 if (parent_class->item_handler)
586 return parent_class->item_handler(event_context, item, event);
587 return FALSE;
588 }
590 void ink_node_tool_select_area(InkNodeTool *nt, Geom::Rect const &sel, GdkEventButton *event)
591 {
592 using namespace Inkscape::UI;
593 if (nt->_multipath->empty()) {
594 // if multipath is empty, select rubberbanded items rather than nodes
595 Inkscape::Selection *selection = nt->desktop->selection;
596 GSList *items = sp_document_items_in_box(
597 sp_desktop_document(nt->desktop), nt->desktop->dkey, sel);
598 selection->setList(items);
599 g_slist_free(items);
600 } else {
601 if (!held_shift(*event)) nt->_selected_nodes->clear();
602 nt->_selected_nodes->selectArea(sel);
603 }
604 }
605 void ink_node_tool_select_point(InkNodeTool *nt, Geom::Point const &/*sel*/, GdkEventButton *event)
606 {
607 using namespace Inkscape::UI; // pull in event helpers
608 if (!event) return;
609 if (event->button != 1) return;
611 Inkscape::Selection *selection = nt->desktop->selection;
613 SPItem *item_clicked = sp_event_context_find_item (nt->desktop, event_point(*event),
614 (event->state & GDK_MOD1_MASK) && !(event->state & GDK_CONTROL_MASK), TRUE);
616 if (item_clicked == NULL) { // nothing under cursor
617 // if no Shift, deselect
618 if (!(event->state & GDK_SHIFT_MASK)) {
619 selection->clear();
620 }
621 } else {
622 if (held_shift(*event)) {
623 selection->toggle(item_clicked);
624 } else {
625 selection->set(item_clicked);
626 }
627 nt->desktop->updateNow();
628 }
629 }
631 void ink_node_tool_mouseover_changed(InkNodeTool *nt, Inkscape::UI::ControlPoint *p)
632 {
633 using Inkscape::UI::CurveDragPoint;
634 CurveDragPoint *cdp = dynamic_cast<CurveDragPoint*>(p);
635 if (cdp && !nt->cursor_drag) {
636 nt->cursor_shape = cursor_node_d_xpm;
637 nt->hot_x = 1;
638 nt->hot_y = 1;
639 sp_event_context_update_cursor(nt);
640 nt->cursor_drag = true;
641 } else if (!cdp && nt->cursor_drag) {
642 nt->cursor_shape = cursor_node_xpm;
643 nt->hot_x = 1;
644 nt->hot_y = 1;
645 sp_event_context_update_cursor(nt);
646 nt->cursor_drag = false;
647 }
648 }
650 } // anonymous namespace
652 /*
653 Local Variables:
654 mode:c++
655 c-file-style:"stroustrup"
656 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
657 indent-tabs-mode:nil
658 fill-column:99
659 End:
660 */
661 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :