Code

Fix #338838, in which zooming and panning with the middle mouse button made Inkscape...
[inkscape.git] / src / node-context.cpp
1 #define __SP_NODE_CONTEXT_C__
3 /*
4  * Node editing context
5  *
6  * Authors:
7  *   Lauris Kaplinski <lauris@kaplinski.com>
8  *   bulia byak <buliabyak@users.sf.net>
9  *
10  * This code is in public domain
11  */
13 #ifdef HAVE_CONFIG_H
14 # include "config.h"
15 #endif
16 #include <cstring>
17 #include <string>
18 #include <gdk/gdkkeysyms.h>
19 #include "macros.h"
20 #include <glibmm/i18n.h>
21 #include "display/sp-canvas-util.h"
22 #include "object-edit.h"
23 #include "sp-path.h"
24 #include "path-chemistry.h"
25 #include "rubberband.h"
26 #include "desktop.h"
27 #include "desktop-handles.h"
28 #include "selection.h"
29 #include "pixmaps/cursor-node.xpm"
30 #include "message-context.h"
31 #include "node-context.h"
32 #include "pixmaps/cursor-node-d.xpm"
33 #include "preferences.h"
34 #include "xml/node-event-vector.h"
35 #include "style.h"
36 #include "splivarot.h"
37 #include "shape-editor.h"
38 #include "live_effects/effect.h"
40 #include "sp-lpe-item.h"
42 // needed for flash nodepath upon mouseover:
43 #include "display/canvas-bpath.h"
44 #include "display/curve.h"
46 static void sp_node_context_class_init(SPNodeContextClass *klass);
47 static void sp_node_context_init(SPNodeContext *node_context);
48 static void sp_node_context_dispose(GObject *object);
50 static void sp_node_context_setup(SPEventContext *ec);
51 static gint sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event);
52 static gint sp_node_context_item_handler(SPEventContext *event_context,
53                                          SPItem *item, GdkEvent *event);
55 static SPEventContextClass *parent_class;
57 GType
58 sp_node_context_get_type()
59 {
60     static GType type = 0;
61     if (!type) {
62         GTypeInfo info = {
63             sizeof(SPNodeContextClass),
64             NULL, NULL,
65             (GClassInitFunc) sp_node_context_class_init,
66             NULL, NULL,
67             sizeof(SPNodeContext),
68             4,
69             (GInstanceInitFunc) sp_node_context_init,
70             NULL,    /* value_table */
71         };
72         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPNodeContext", &info, (GTypeFlags)0);
73     }
74     return type;
75 }
77 static void
78 sp_node_context_class_init(SPNodeContextClass *klass)
79 {
80     GObjectClass *object_class = (GObjectClass *) klass;
81     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
83     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
85     object_class->dispose = sp_node_context_dispose;
87     event_context_class->setup = sp_node_context_setup;
88     event_context_class->root_handler = sp_node_context_root_handler;
89     event_context_class->item_handler = sp_node_context_item_handler;
90 }
92 static void
93 sp_node_context_init(SPNodeContext *node_context)
94 {
95     SPEventContext *event_context = SP_EVENT_CONTEXT(node_context);
97     event_context->cursor_shape = cursor_node_xpm;
98     event_context->hot_x = 1;
99     event_context->hot_y = 1;
101     node_context->leftalt = FALSE;
102     node_context->rightalt = FALSE;
103     node_context->leftctrl = FALSE;
104     node_context->rightctrl = FALSE;
106     new (&node_context->sel_changed_connection) sigc::connection();
108     node_context->flash_tempitem = NULL;
109     node_context->flashed_item = NULL;
110     node_context->remove_flash_counter = 0;
113 static void
114 sp_node_context_dispose(GObject *object)
116         SPNodeContext *nc = SP_NODE_CONTEXT(object);
117     SPEventContext *ec = SP_EVENT_CONTEXT(object);
119     ec->enableGrDrag(false);
121     nc->sel_changed_connection.disconnect();
122     nc->sel_changed_connection.~connection();
124     delete ec->shape_editor;
126     if (nc->_node_message_context) {
127         delete nc->_node_message_context;
128     }
130     G_OBJECT_CLASS(parent_class)->dispose(object);
133 static void
134 sp_node_context_setup(SPEventContext *ec)
136     SPNodeContext *nc = SP_NODE_CONTEXT(ec);
138     if (((SPEventContextClass *) parent_class)->setup)
139         ((SPEventContextClass *) parent_class)->setup(ec);
141     Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
142     nc->sel_changed_connection.disconnect();
143     nc->sel_changed_connection =
144         selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_node_context_selection_changed), (gpointer)nc));
146     SPItem *item = selection->singleItem();
148     ec->shape_editor = new ShapeEditor(ec->desktop);
150     nc->rb_escaped = false;
152     nc->cursor_drag = false;
154     nc->added_node = false;
156     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
158     if (item) {
159         ec->shape_editor->set_item(item, SH_NODEPATH);
160         ec->shape_editor->set_item(item, SH_KNOTHOLDER);
161     }
163     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
164     if (prefs->getBool("/tools/nodes/selcue")) {
165         ec->enableSelectionCue();
166     }
167     if (prefs->getBool("/tools/nodes/gradientdrag")) {
168         ec->enableGrDrag();
169     }
171     ec->desktop->emitToolSubselectionChanged(NULL); // sets the coord entry fields to inactive
173     nc->_node_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
175     ec->shape_editor->update_statusbar();
178 static void
179 sp_node_context_flash_path(SPEventContext *event_context, SPItem *item, guint timeout) {
180     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
182     nc->remove_flash_counter = 3; // for some reason root_handler is called twice after each item_handler...
183     if (nc->flashed_item != item) {
184         // we entered a new item
185         nc->flashed_item = item;
186         SPDesktop *desktop = event_context->desktop;
187         if (nc->flash_tempitem) {
188             desktop->remove_temporary_canvasitem(nc->flash_tempitem);
189             nc->flash_tempitem = NULL;
190         }
192         SPCanvasItem *canvasitem = sp_nodepath_generate_helperpath(desktop, item);
194         if (canvasitem) {
195             nc->flash_tempitem = desktop->add_temporary_canvasitem (canvasitem, timeout);
196         }
197     }
200 /**
201 \brief  Callback that processes the "changed" signal on the selection;
202 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
203 */
204 void
205 sp_node_context_selection_changed(Inkscape::Selection *selection, gpointer data)
207     SPEventContext *ec = SP_EVENT_CONTEXT(data);
209     // TODO: update ShapeEditorsCollective instead
210     ec->shape_editor->unset_item(SH_NODEPATH);
211     ec->shape_editor->unset_item(SH_KNOTHOLDER);
212     SPItem *item = selection->singleItem();
213     ec->shape_editor->set_item(item, SH_NODEPATH);
214     ec->shape_editor->set_item(item, SH_KNOTHOLDER);
215     ec->shape_editor->update_statusbar();
218 void
219 sp_node_context_show_modifier_tip(SPEventContext *event_context, GdkEvent *event)
221     sp_event_show_modifier_tip
222         (event_context->defaultMessageContext(), event,
223          _("<b>Ctrl</b>: toggle node type, snap handle angle, move hor/vert; <b>Ctrl+Alt</b>: move along handles"),
224          _("<b>Shift</b>: toggle node selection, disable snapping, rotate both handles"),
225          _("<b>Alt</b>: lock handle length; <b>Ctrl+Alt</b>: move along handles"));
228 static gint
229 sp_node_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
231     gint ret = FALSE;
232     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
234     if (prefs->getBool("/tools/nodes/pathflash_enabled")) {
235         if (prefs->getBool("/tools/nodes/pathflash_unselected")) {
236             SPDesktop *desktop = event_context->desktop;
237             ShapeEditor* se = event_context->shape_editor;
238             Inkscape::Selection *selection = sp_desktop_selection (desktop);
239             if (se->has_nodepath() && selection->singleItem()) {
240                 return ret;
241             }
242         }
243         if (SP_IS_LPE_ITEM(item)) {
244             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
245             if (lpe && (lpe->providesOwnFlashPaths() ||
246                         lpe->pathFlashType() == Inkscape::LivePathEffect::SUPPRESS_FLASH)) {
247                 // path should be suppressed or permanent; this is handled in
248                 // sp_node_context_selection_changed()
249                 return ret;
250             }
251         }
252         guint timeout = prefs->getInt("/tools/nodes/pathflash_timeout", 500);
253         sp_node_context_flash_path(event_context, item, timeout);
254     }
256     if (((SPEventContextClass *) parent_class)->item_handler)
257         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
259     return ret;
262 static gint
263 sp_node_context_root_handler(SPEventContext *event_context, GdkEvent *event)
265     SPDesktop *desktop = event_context->desktop;
266     ShapeEditor* se = event_context->shape_editor;
267     Inkscape::Selection *selection = sp_desktop_selection (desktop);
268     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
270     SPNodeContext *nc = SP_NODE_CONTEXT(event_context);
271     double const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000); // in px
272     event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); // read every time, to make prefs changes really live
273     int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
274     double const offset = prefs->getDoubleLimited("/options/defaultscale/value", 2, 0, 1000);
276     if ( (nc->flash_tempitem) && (nc->remove_flash_counter <= 0) ) {
277         desktop->remove_temporary_canvasitem(nc->flash_tempitem);
278         nc->flash_tempitem = NULL;
279         nc->flashed_item = NULL; // also reset this one, so the next time the same object is hovered over it shows again the highlight
280     } else {
281         nc->remove_flash_counter--;
282     }
284     gint ret = FALSE;
285     switch (event->type) {
286         case GDK_BUTTON_PRESS:
287             if (event->button.button == 1 && !event_context->space_panning) {
288                 // save drag origin
289                 event_context->xp = (gint) event->button.x;
290                 event_context->yp = (gint) event->button.y;
291                 event_context->within_tolerance = true;
292                 se->cancel_hit();
294                 if (!(event->button.state & GDK_SHIFT_MASK)) {
295                     if (!nc->drag) {
296                         if (se->has_nodepath() && selection->single() /* && item_over */) {
297                                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
298                                 // save drag origin
299                             bool over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), true);
300                             //only dragging curves
301                             if (over_stroke) {
302                                 ret = TRUE;
303                                 break;
304                             }
305                         }
306                     }
307                 }
308                 Geom::Point const button_w(event->button.x,
309                                          event->button.y);
310                 Geom::Point const button_dt(desktop->w2d(button_w));
311                 Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
312                 nc->current_state = SP_NODE_CONTEXT_INACTIVE;
313                 desktop->updateNow();
314                 ret = TRUE;
315             }
316             break;
317         case GDK_MOTION_NOTIFY:
318             if (event->motion.state & GDK_BUTTON1_MASK && !event_context->space_panning) {
320                 if ( event_context->within_tolerance
321                      && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
322                      && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
323                     break; // do not drag if we're within tolerance from origin
324                 }
326                 // The path went away while dragging; throw away any further motion
327                 // events until the mouse pointer is released.
329                 if (se->hits_curve() && !se->has_nodepath()) {
330                   break;
331                 }
333                 // Once the user has moved farther than tolerance from the original location
334                 // (indicating they intend to move the object, not click), then always process the
335                 // motion notify coordinates as given (no snapping back to origin)
336                 event_context->within_tolerance = false;
338                 // Once we determine what the user is doing (dragging either a node or the
339                 // selection rubberband), make sure we continue to perform that operation
340                 // until the mouse pointer is lifted.
341                 if (nc->current_state == SP_NODE_CONTEXT_INACTIVE) {
342                     if (se->hits_curve() && se->has_nodepath()) {
343                         nc->current_state = SP_NODE_CONTEXT_NODE_DRAGGING;
344                     } else {
345                         nc->current_state = SP_NODE_CONTEXT_RUBBERBAND_DRAGGING;
346                     }
347                 }
349                 switch (nc->current_state) {
350                     case SP_NODE_CONTEXT_NODE_DRAGGING:
351                         {
352                             se->curve_drag (event->motion.x, event->motion.y);
354                             gobble_motion_events(GDK_BUTTON1_MASK);
355                             break;
356                         }
357                     case SP_NODE_CONTEXT_RUBBERBAND_DRAGGING:
358                         if (Inkscape::Rubberband::get(desktop)->is_started()) {
359                             Geom::Point const motion_w(event->motion.x,
360                                                 event->motion.y);
361                             Geom::Point const motion_dt(desktop->w2d(motion_w));
362                             Inkscape::Rubberband::get(desktop)->move(motion_dt);
363                         }
364                         break;
365                 }
367                 nc->drag = TRUE;
368                 ret = TRUE;
369             } else {
370                 if (!se->has_nodepath() || selection->singleItem() == NULL) {
371                     break;
372                 }
374                 bool over_stroke = false;
375                 over_stroke = se->is_over_stroke(Geom::Point(event->motion.x, event->motion.y), false);
377                 if (nc->cursor_drag && !over_stroke) {
378                     event_context->cursor_shape = cursor_node_xpm;
379                     event_context->hot_x = 1;
380                     event_context->hot_y = 1;
381                     sp_event_context_update_cursor(event_context);
382                     nc->cursor_drag = false;
383                 } else if (!nc->cursor_drag && over_stroke) {
384                     event_context->cursor_shape = cursor_node_d_xpm;
385                     event_context->hot_x = 1;
386                     event_context->hot_y = 1;
387                     sp_event_context_update_cursor(event_context);
388                     nc->cursor_drag = true;
389                 }
390             }
391             break;
393         case GDK_2BUTTON_PRESS:
394         case GDK_BUTTON_RELEASE:
395             if ( (event->button.button == 1) && (!nc->drag) && !event_context->space_panning) {
396                 // find out clicked item, disregarding groups, honoring Alt
397                 SPItem *item_clicked = sp_event_context_find_item (desktop,
398                         Geom::Point(event->button.x, event->button.y),
399                         (event->button.state & GDK_MOD1_MASK) && !(event->button.state & GDK_CONTROL_MASK), TRUE);
401                 event_context->xp = event_context->yp = 0;
403                 bool over_stroke = false;
404                 if (se->has_nodepath()) {
405                     over_stroke = se->is_over_stroke(Geom::Point(event->button.x, event->button.y), false);
406                 }
408                 if (item_clicked || over_stroke) {
409                     if (over_stroke || nc->added_node) {
410                         switch (event->type) {
411                             case GDK_BUTTON_RELEASE:
412                                 if (event->button.state & GDK_CONTROL_MASK && event->button.state & GDK_MOD1_MASK) {
413                                     //add a node
414                                     se->add_node_near_point();
415                                 } else {
416                                     if (nc->added_node) { // we just received double click, ignore release
417                                         nc->added_node = false;
418                                         break;
419                                     }
420                                     //select the segment
421                                     if (event->button.state & GDK_SHIFT_MASK) {
422                                         se->select_segment_near_point(true);
423                                     } else {
424                                         se->select_segment_near_point(false);
425                                     }
426                                     desktop->updateNow();
427                                 }
428                                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
429                                 break;
430                             case GDK_2BUTTON_PRESS:
431                                 //add a node
432                                 se->add_node_near_point();
433                                 nc->added_node = true;
434                                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
435                                 break;
436                             default:
437                                 break;
438                         }
439                     } else if (event->button.state & GDK_SHIFT_MASK) {
440                         selection->toggle(item_clicked);
441                         desktop->updateNow();
442                     } else {
443                         selection->set(item_clicked);
444                         desktop->updateNow();
445                     }
446                     Inkscape::Rubberband::get(desktop)->stop();
447                     ret = TRUE;
448                     break;
449                 }
450             }
451             if (event->type == GDK_BUTTON_RELEASE) {
452                 event_context->xp = event_context->yp = 0;
453                 if (event->button.button == 1) {
454                         Geom::OptRect b = Inkscape::Rubberband::get(desktop)->getRectangle();
456                     if (se->hits_curve() && !event_context->within_tolerance) { //drag curve
457                         se->finish_drag();
458                     } else if (b && !event_context->within_tolerance) { // drag to select
459                         se->select_rect(*b, event->button.state & GDK_SHIFT_MASK);
460                     } else {
461                         if (!(nc->rb_escaped)) { // unless something was canceled
462                             if (se->has_selection())
463                                 se->deselect();
464                             else
465                                 sp_desktop_selection(desktop)->clear();
466                         }
467                     }
468                     ret = TRUE;
469                     Inkscape::Rubberband::get(desktop)->stop();
470                     desktop->updateNow();
471                     nc->rb_escaped = false;
472                     nc->drag = FALSE;
473                     se->cancel_hit();
474                     nc->current_state = SP_NODE_CONTEXT_INACTIVE;
475                 }
476             }
477             break;
478         case GDK_KEY_PRESS:
479             switch (get_group0_keyval(&event->key)) {
480                 case GDK_Insert:
481                 case GDK_KP_Insert:
482                     // with any modifiers
483                     se->add_node();
484                     ret = TRUE;
485                     break;
486                 case GDK_I:
487                 case GDK_i:
488                     // apple keyboards have no Insert
489                     if (MOD__SHIFT_ONLY) {
490                         se->add_node();
491                         ret = TRUE;
492                     }
493                     break;
494                 case GDK_Delete:
495                 case GDK_KP_Delete:
496                 case GDK_BackSpace:
497                     if (MOD__CTRL_ONLY) {
498                         se->delete_nodes();
499                     } else {
500                         se->delete_nodes_preserving_shape();
501                     }
502                     ret = TRUE;
503                     break;
504                 case GDK_C:
505                 case GDK_c:
506                     if (MOD__SHIFT_ONLY) {
507                         se->set_node_type(Inkscape::NodePath::NODE_CUSP);
508                         ret = TRUE;
509                     }
510                     break;
511                 case GDK_S:
512                 case GDK_s:
513                     if (MOD__SHIFT_ONLY) {
514                         se->set_node_type(Inkscape::NodePath::NODE_SMOOTH);
515                         ret = TRUE;
516                     }
517                     break;
518                 case GDK_A:
519                 case GDK_a:
520                     if (MOD__SHIFT_ONLY) {
521                         se->set_node_type(Inkscape::NodePath::NODE_AUTO);
522                         ret = TRUE;
523                     }
524                     break;
525                 case GDK_Y:
526                 case GDK_y:
527                     if (MOD__SHIFT_ONLY) {
528                         se->set_node_type(Inkscape::NodePath::NODE_SYMM);
529                         ret = TRUE;
530                     }
531                     break;
532                 case GDK_B:
533                 case GDK_b:
534                     if (MOD__SHIFT_ONLY) {
535                         se->break_at_nodes();
536                         ret = TRUE;
537                     }
538                     break;
539                 case GDK_J:
540                 case GDK_j:
541                     if (MOD__SHIFT_ONLY) {
542                         se->join_nodes();
543                         ret = TRUE;
544                     }
545                     break;
546                 case GDK_D:
547                 case GDK_d:
548                     if (MOD__SHIFT_ONLY) {
549                         se->duplicate_nodes();
550                         ret = TRUE;
551                     }
552                     break;
553                 case GDK_L:
554                 case GDK_l:
555                     if (MOD__SHIFT_ONLY) {
556                         se->set_type_of_segments(NR_LINETO);
557                         ret = TRUE;
558                     }
559                     break;
560                 case GDK_U:
561                 case GDK_u:
562                     if (MOD__SHIFT_ONLY) {
563                         se->set_type_of_segments(NR_CURVETO);
564                         ret = TRUE;
565                     }
566                     break;
567                 case GDK_R:
568                 case GDK_r:
569                     if (MOD__SHIFT_ONLY) {
570                         // FIXME: add top panel button
571                         sp_selected_path_reverse(desktop);
572                         ret = TRUE;
573                     }
574                     break;
575                 case GDK_x:
576                 case GDK_X:
577                     if (MOD__ALT_ONLY) {
578                         desktop->setToolboxFocusTo ("altx-nodes");
579                         ret = TRUE;
580                     }
581                     break;
582                 case GDK_Left: // move selection left
583                 case GDK_KP_Left:
584                 case GDK_KP_4:
585                     if (!MOD__CTRL) { // not ctrl
586                         gint mul = 1 + gobble_key_events(
587                             get_group0_keyval(&event->key), 0); // with any mask
588                         if (MOD__ALT) { // alt
589                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*-10, 0); // shift
590                             else se->move_nodes_screen(desktop, mul*-1, 0); // no shift
591                         }
592                         else { // no alt
593                             if (MOD__SHIFT) se->move_nodes(mul*-10*nudge, 0); // shift
594                             else se->move_nodes(mul*-nudge, 0); // no shift
595                         }
596                         ret = TRUE;
597                     }
598                     break;
599                 case GDK_Up: // move selection up
600                 case GDK_KP_Up:
601                 case GDK_KP_8:
602                     if (!MOD__CTRL) { // not ctrl
603                         gint mul = 1 + gobble_key_events(
604                             get_group0_keyval(&event->key), 0); // with any mask
605                         if (MOD__ALT) { // alt
606                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*10); // shift
607                             else se->move_nodes_screen(desktop, 0, mul*1); // no shift
608                         }
609                         else { // no alt
610                             if (MOD__SHIFT) se->move_nodes(0, mul*10*nudge); // shift
611                             else se->move_nodes(0, mul*nudge); // no shift
612                         }
613                         ret = TRUE;
614                     }
615                     break;
616                 case GDK_Right: // move selection right
617                 case GDK_KP_Right:
618                 case GDK_KP_6:
619                     if (!MOD__CTRL) { // not ctrl
620                         gint mul = 1 + gobble_key_events(
621                             get_group0_keyval(&event->key), 0); // with any mask
622                         if (MOD__ALT) { // alt
623                             if (MOD__SHIFT) se->move_nodes_screen(desktop, mul*10, 0); // shift
624                             else se->move_nodes_screen(desktop, mul*1, 0); // no shift
625                         }
626                         else { // no alt
627                             if (MOD__SHIFT) se->move_nodes(mul*10*nudge, 0); // shift
628                             else se->move_nodes(mul*nudge, 0); // no shift
629                         }
630                         ret = TRUE;
631                     }
632                     break;
633                 case GDK_Down: // move selection down
634                 case GDK_KP_Down:
635                 case GDK_KP_2:
636                     if (!MOD__CTRL) { // not ctrl
637                         gint mul = 1 + gobble_key_events(
638                             get_group0_keyval(&event->key), 0); // with any mask
639                         if (MOD__ALT) { // alt
640                             if (MOD__SHIFT) se->move_nodes_screen(desktop, 0, mul*-10); // shift
641                             else se->move_nodes_screen(desktop, 0, mul*-1); // no shift
642                         }
643                         else { // no alt
644                             if (MOD__SHIFT) se->move_nodes(0, mul*-10*nudge); // shift
645                             else se->move_nodes(0, mul*-nudge); // no shift
646                         }
647                         ret = TRUE;
648                     }
649                     break;
650                 case GDK_Escape:
651                 {
652                     Geom::OptRect const b = Inkscape::Rubberband::get(desktop)->getRectangle();
653                     if (b) {
654                         Inkscape::Rubberband::get(desktop)->stop();
655                         nc->current_state = SP_NODE_CONTEXT_INACTIVE;
656                         nc->rb_escaped = true;
657                     } else {
658                         if (se->has_selection()) {
659                             se->deselect();
660                         } else {
661                             sp_desktop_selection(desktop)->clear();
662                         }
663                     }
664                     ret = TRUE;
665                     break;
666                 }
668                 case GDK_bracketleft:
669                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
670                         if (nc->leftctrl)
671                             se->rotate_nodes (M_PI/snaps, -1, false);
672                         if (nc->rightctrl)
673                             se->rotate_nodes (M_PI/snaps, 1, false);
674                     } else if ( MOD__ALT && !MOD__CTRL ) {
675                         if (nc->leftalt && nc->rightalt)
676                             se->rotate_nodes (1, 0, true);
677                         else {
678                             if (nc->leftalt)
679                                 se->rotate_nodes (1, -1, true);
680                             if (nc->rightalt)
681                                 se->rotate_nodes (1, 1, true);
682                         }
683                     } else if ( snaps != 0 ) {
684                         se->rotate_nodes (M_PI/snaps, 0, false);
685                     }
686                     ret = TRUE;
687                     break;
688                 case GDK_bracketright:
689                     if ( MOD__CTRL && !MOD__ALT && ( snaps != 0 ) ) {
690                         if (nc->leftctrl)
691                             se->rotate_nodes (-M_PI/snaps, -1, false);
692                         if (nc->rightctrl)
693                             se->rotate_nodes (-M_PI/snaps, 1, false);
694                     } else if ( MOD__ALT && !MOD__CTRL ) {
695                         if (nc->leftalt && nc->rightalt)
696                             se->rotate_nodes (-1, 0, true);
697                         else {
698                             if (nc->leftalt)
699                                 se->rotate_nodes (-1, -1, true);
700                             if (nc->rightalt)
701                                 se->rotate_nodes (-1, 1, true);
702                         }
703                     } else if ( snaps != 0 ) {
704                         se->rotate_nodes (-M_PI/snaps, 0, false);
705                     }
706                     ret = TRUE;
707                     break;
708                 case GDK_less:
709                 case GDK_comma:
710                     if (MOD__CTRL) {
711                         if (nc->leftctrl)
712                             se->scale_nodes(-offset, -1);
713                         if (nc->rightctrl)
714                             se->scale_nodes(-offset, 1);
715                     } else if (MOD__ALT) {
716                         if (nc->leftalt && nc->rightalt)
717                             se->scale_nodes_screen (-1, 0);
718                         else {
719                             if (nc->leftalt)
720                                 se->scale_nodes_screen (-1, -1);
721                             if (nc->rightalt)
722                                 se->scale_nodes_screen (-1, 1);
723                         }
724                     } else {
725                         se->scale_nodes (-offset, 0);
726                     }
727                     ret = TRUE;
728                     break;
729                 case GDK_greater:
730                 case GDK_period:
731                     if (MOD__CTRL) {
732                         if (nc->leftctrl)
733                             se->scale_nodes (offset, -1);
734                         if (nc->rightctrl)
735                             se->scale_nodes (offset, 1);
736                     } else if (MOD__ALT) {
737                         if (nc->leftalt && nc->rightalt)
738                             se->scale_nodes_screen (1, 0);
739                         else {
740                             if (nc->leftalt)
741                                 se->scale_nodes_screen (1, -1);
742                             if (nc->rightalt)
743                                 se->scale_nodes_screen (1, 1);
744                         }
745                     } else {
746                         se->scale_nodes (offset, 0);
747                     }
748                     ret = TRUE;
749                     break;
751                 case GDK_Alt_L:
752                     nc->leftalt = TRUE;
753                     sp_node_context_show_modifier_tip(event_context, event);
754                     break;
755                 case GDK_Alt_R:
756                     nc->rightalt = TRUE;
757                     sp_node_context_show_modifier_tip(event_context, event);
758                     break;
759                 case GDK_Control_L:
760                     nc->leftctrl = TRUE;
761                     sp_node_context_show_modifier_tip(event_context, event);
762                     break;
763                 case GDK_Control_R:
764                     nc->rightctrl = TRUE;
765                     sp_node_context_show_modifier_tip(event_context, event);
766                     break;
767                 case GDK_Shift_L:
768                 case GDK_Shift_R:
769                 case GDK_Meta_L:
770                 case GDK_Meta_R:
771                     sp_node_context_show_modifier_tip(event_context, event);
772                     break;
773                 default:
774                     ret = node_key(event);
775                     break;
776             }
777             break;
778         case GDK_KEY_RELEASE:
779             switch (get_group0_keyval(&event->key)) {
780                 case GDK_Alt_L:
781                     nc->leftalt = FALSE;
782                     event_context->defaultMessageContext()->clear();
783                     break;
784                 case GDK_Alt_R:
785                     nc->rightalt = FALSE;
786                     event_context->defaultMessageContext()->clear();
787                     break;
788                 case GDK_Control_L:
789                     nc->leftctrl = FALSE;
790                     event_context->defaultMessageContext()->clear();
791                     break;
792                 case GDK_Control_R:
793                     nc->rightctrl = FALSE;
794                     event_context->defaultMessageContext()->clear();
795                     break;
796                 case GDK_Shift_L:
797                 case GDK_Shift_R:
798                 case GDK_Meta_L:
799                 case GDK_Meta_R:
800                     event_context->defaultMessageContext()->clear();
801                     break;
802             }
803             break;
804         default:
805             break;
806     }
808     if (!ret) {
809         if (((SPEventContextClass *) parent_class)->root_handler)
810             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
811     }
813     return ret;
817 /*
818   Local Variables:
819   mode:c++
820   c-file-style:"stroustrup"
821   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
822   indent-tabs-mode:nil
823   fill-column:99
824   End:
825 */
826 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :