1 /** \file
2 * Pen event context implementation.
3 */
5 /*
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * bulia byak <buliabyak@users.sf.net>
9 *
10 * Copyright (C) 2000 Lauris Kaplinski
11 * Copyright (C) 2000-2001 Ximian, Inc.
12 * Copyright (C) 2002 Lauris Kaplinski
13 * Copyright (C) 2004 Monash University
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #include <gdk/gdkkeysyms.h>
19 #include <cstring>
20 #include <string>
22 #include "pen-context.h"
23 #include "sp-namedview.h"
24 #include "sp-metrics.h"
25 #include "desktop.h"
26 #include "desktop-handles.h"
27 #include "selection.h"
28 #include "selection-chemistry.h"
29 #include "draw-anchor.h"
30 #include "message-stack.h"
31 #include "message-context.h"
32 #include "prefs-utils.h"
33 #include "sp-path.h"
34 #include "display/curve.h"
35 #include "pixmaps/cursor-pen.xpm"
36 #include "display/canvas-bpath.h"
37 #include "display/sp-ctrlline.h"
38 #include "display/sodipodi-ctrl.h"
39 #include <glibmm/i18n.h>
40 #include "libnr/n-art-bpath.h"
41 #include "libnr/nr-point-ops.h"
42 #include "helper/units.h"
43 #include "macros.h"
44 #include "context-fns.h"
46 static void sp_pen_context_class_init(SPPenContextClass *klass);
47 static void sp_pen_context_init(SPPenContext *pc);
48 static void sp_pen_context_dispose(GObject *object);
50 static void sp_pen_context_setup(SPEventContext *ec);
51 static void sp_pen_context_finish(SPEventContext *ec);
52 static void sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
53 static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event);
54 static gint sp_pen_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
56 static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
57 static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
58 static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
59 static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
61 static void spdc_pen_finish(SPPenContext *pc, gboolean closed);
63 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent);
64 static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent);
65 static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent);
66 static gint pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent);
67 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
68 static void spdc_reset_colors(SPPenContext *pc);
70 static void pen_disable_events(SPPenContext *const pc);
71 static void pen_enable_events(SPPenContext *const pc);
73 static NR::Point pen_drag_origin_w(0, 0);
74 static bool pen_within_tolerance = false;
76 static SPDrawContextClass *pen_parent_class;
78 /**
79 * Register SPPenContext with Gdk and return its type.
80 */
81 GType
82 sp_pen_context_get_type(void)
83 {
84 static GType type = 0;
85 if (!type) {
86 GTypeInfo info = {
87 sizeof(SPPenContextClass),
88 NULL, NULL,
89 (GClassInitFunc) sp_pen_context_class_init,
90 NULL, NULL,
91 sizeof(SPPenContext),
92 4,
93 (GInstanceInitFunc) sp_pen_context_init,
94 NULL, /* value_table */
95 };
96 type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0);
97 }
98 return type;
99 }
101 /**
102 * Initialize the SPPenContext vtable.
103 */
104 static void
105 sp_pen_context_class_init(SPPenContextClass *klass)
106 {
107 GObjectClass *object_class;
108 SPEventContextClass *event_context_class;
110 object_class = (GObjectClass *) klass;
111 event_context_class = (SPEventContextClass *) klass;
113 pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(klass);
115 object_class->dispose = sp_pen_context_dispose;
117 event_context_class->setup = sp_pen_context_setup;
118 event_context_class->finish = sp_pen_context_finish;
119 event_context_class->set = sp_pen_context_set;
120 event_context_class->root_handler = sp_pen_context_root_handler;
121 event_context_class->item_handler = sp_pen_context_item_handler;
122 }
124 /**
125 * Callback to initialize SPPenContext object.
126 */
127 static void
128 sp_pen_context_init(SPPenContext *pc)
129 {
131 SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
133 event_context->cursor_shape = cursor_pen_xpm;
134 event_context->hot_x = 4;
135 event_context->hot_y = 4;
137 pc->npoints = 0;
138 pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
139 pc->state = SP_PEN_CONTEXT_POINT;
141 pc->c0 = NULL;
142 pc->c1 = NULL;
143 pc->cl0 = NULL;
144 pc->cl1 = NULL;
146 pc->events_disabled = 0;
148 pc->polylines_only = false;
149 pc->waiting_LPE = NULL;
150 }
152 /**
153 * Callback to destroy the SPPenContext object's members and itself.
154 */
155 static void
156 sp_pen_context_dispose(GObject *object)
157 {
158 SPPenContext *pc;
160 pc = SP_PEN_CONTEXT(object);
162 if (pc->c0) {
163 gtk_object_destroy(GTK_OBJECT(pc->c0));
164 pc->c0 = NULL;
165 }
166 if (pc->c1) {
167 gtk_object_destroy(GTK_OBJECT(pc->c1));
168 pc->c1 = NULL;
169 }
170 if (pc->cl0) {
171 gtk_object_destroy(GTK_OBJECT(pc->cl0));
172 pc->cl0 = NULL;
173 }
174 if (pc->cl1) {
175 gtk_object_destroy(GTK_OBJECT(pc->cl1));
176 pc->cl1 = NULL;
177 }
179 G_OBJECT_CLASS(pen_parent_class)->dispose(object);
181 pc->polylines_only = false;
182 pc->waiting_LPE = NULL;
183 if (pc->expecting_clicks_for_LPE > 0) {
184 // we received too few clicks to sanely set the parameter path so we remove the LPE from the item
185 sp_lpe_item_remove_current_path_effect(pc->waiting_item, false);
186 }
187 }
189 /**
190 * Callback to initialize SPPenContext object.
191 */
192 static void
193 sp_pen_context_setup(SPEventContext *ec)
194 {
195 SPPenContext *pc;
197 pc = SP_PEN_CONTEXT(ec);
199 if (((SPEventContextClass *) pen_parent_class)->setup) {
200 ((SPEventContextClass *) pen_parent_class)->setup(ec);
201 }
203 /* Pen indicators */
204 pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
205 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
206 pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
207 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
208 pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
209 sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
210 pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
211 sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
213 sp_canvas_item_hide(pc->c0);
214 sp_canvas_item_hide(pc->c1);
215 sp_canvas_item_hide(pc->cl0);
216 sp_canvas_item_hide(pc->cl1);
218 sp_event_context_read(ec, "mode");
220 pc->anchor_statusbar = false;
222 if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
223 ec->enableSelectionCue();
224 }
225 }
227 static void
228 pen_cancel (SPPenContext *const pc)
229 {
230 pc->state = SP_PEN_CONTEXT_STOP;
231 spdc_reset_colors(pc);
232 sp_canvas_item_hide(pc->c0);
233 sp_canvas_item_hide(pc->c1);
234 sp_canvas_item_hide(pc->cl0);
235 sp_canvas_item_hide(pc->cl1);
236 pc->_message_context->clear();
237 pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
239 sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
240 }
242 /**
243 * Finalization callback.
244 */
245 static void
246 sp_pen_context_finish(SPEventContext *ec)
247 {
248 SPPenContext *pc = SP_PEN_CONTEXT(ec);
250 if (pc->npoints != 0) {
251 pen_cancel (pc);
252 }
254 if (((SPEventContextClass *) pen_parent_class)->finish) {
255 ((SPEventContextClass *) pen_parent_class)->finish(ec);
256 }
257 }
259 /**
260 * Callback that sets key to value in pen context.
261 */
262 static void
263 sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
264 {
265 SPPenContext *pc = SP_PEN_CONTEXT(ec);
267 if (!strcmp(key, "mode")) {
268 if ( val && !strcmp(val, "drag") ) {
269 pc->mode = SP_PEN_CONTEXT_MODE_DRAG;
270 } else {
271 pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
272 }
273 }
274 }
276 /**
277 * Snaps new node relative to the previous node.
278 */
279 static void
280 spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
281 {
282 if (pc->npoints > 0) {
283 spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
284 }
286 spdc_endpoint_snap_free(pc, p, state);
287 }
289 /**
290 * Snaps new node's handle relative to the new node.
291 */
292 static void
293 spdc_endpoint_snap_handle(SPPenContext const *const pc, NR::Point &p, guint const state)
294 {
295 g_return_if_fail(( pc->npoints == 2 ||
296 pc->npoints == 5 ));
298 spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
299 spdc_endpoint_snap_free(pc, p, state);
300 }
302 static gint
303 sp_pen_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
304 {
305 SPPenContext *const pc = SP_PEN_CONTEXT(ec);
307 gint ret = FALSE;
309 switch (event->type) {
310 case GDK_BUTTON_PRESS:
311 ret = pen_handle_button_press(pc, event->button);
312 break;
313 case GDK_BUTTON_RELEASE:
314 ret = pen_handle_button_release(pc, event->button);
315 break;
316 default:
317 break;
318 }
320 if (!ret) {
321 if (((SPEventContextClass *) pen_parent_class)->item_handler)
322 ret = ((SPEventContextClass *) pen_parent_class)->item_handler(ec, item, event);
323 }
325 return ret;
326 }
328 /**
329 * Callback to handle all pen events.
330 */
331 static gint
332 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
333 {
334 SPPenContext *const pc = SP_PEN_CONTEXT(ec);
336 gint ret = FALSE;
338 switch (event->type) {
339 case GDK_BUTTON_PRESS:
340 ret = pen_handle_button_press(pc, event->button);
341 break;
343 case GDK_MOTION_NOTIFY:
344 ret = pen_handle_motion_notify(pc, event->motion);
345 break;
347 case GDK_BUTTON_RELEASE:
348 ret = pen_handle_button_release(pc, event->button);
349 break;
351 case GDK_2BUTTON_PRESS:
352 ret = pen_handle_2button_press(pc, event->button);
353 break;
355 case GDK_KEY_PRESS:
356 ret = pen_handle_key_press(pc, event);
357 break;
359 default:
360 break;
361 }
363 if (!ret) {
364 gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
365 = ((SPEventContextClass *) pen_parent_class)->root_handler;
366 if (parent_root_handler) {
367 ret = parent_root_handler(ec, event);
368 }
369 }
371 return ret;
372 }
374 /**
375 * Handle mouse button press event.
376 */
377 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
378 {
379 if (pc->events_disabled) {
380 // skip event processing if events are disabled
381 return FALSE;
382 }
384 SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
385 SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
386 NR::Point const event_w(bevent.x, bevent.y);
387 NR::Point const event_dt(desktop->w2d(event_w));
388 SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
390 gint ret = FALSE;
391 if (bevent.button == 1 && !event_context->space_panning
392 // when the last click for a waiting LPE occurs we want to finish the path
393 && pc->expecting_clicks_for_LPE != 1) {
395 if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
396 return TRUE;
397 }
399 if (!pc->grab ) {
400 /* Grab mouse, so release will not pass unnoticed */
401 pc->grab = SP_CANVAS_ITEM(desktop->acetate);
402 sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK |
403 GDK_BUTTON_RELEASE_MASK |
404 GDK_POINTER_MOTION_MASK ),
405 NULL, bevent.time);
406 }
408 pen_drag_origin_w = event_w;
409 pen_within_tolerance = true;
411 /* Test whether we hit any anchor. */
412 SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
414 switch (pc->mode) {
415 case SP_PEN_CONTEXT_MODE_CLICK:
416 /* In click mode we add point on release */
417 switch (pc->state) {
418 case SP_PEN_CONTEXT_POINT:
419 case SP_PEN_CONTEXT_CONTROL:
420 case SP_PEN_CONTEXT_CLOSE:
421 break;
422 case SP_PEN_CONTEXT_STOP:
423 /* This is allowed, if we just cancelled curve */
424 pc->state = SP_PEN_CONTEXT_POINT;
425 break;
426 default:
427 break;
428 }
429 break;
430 case SP_PEN_CONTEXT_MODE_DRAG:
431 switch (pc->state) {
432 case SP_PEN_CONTEXT_STOP:
433 /* This is allowed, if we just cancelled curve */
434 case SP_PEN_CONTEXT_POINT:
435 if (pc->npoints == 0) {
437 if (bevent.state & GDK_CONTROL_MASK) {
438 freehand_create_single_dot(event_context, event_dt, "tools.freehand.pen", bevent.state);
439 ret = TRUE;
440 break;
441 }
443 // TODO: Perhaps it would be nicer to rearrange the following case
444 // distinction so that the case of a waiting LPE is treated separately
446 /* Set start anchor */
447 pc->sa = anchor;
448 NR::Point p;
449 if (anchor && !sp_pen_context_has_waiting_LPE(pc)) {
450 /* Adjust point to anchor if needed; if we have a waiting LPE, we need
451 a fresh path to be created so don't continue an existing one */
452 p = anchor->dp;
453 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
454 } else {
455 // This is the first click of a new curve; deselect item so that
456 // this curve is not combined with it (unless it is drawn from its
457 // anchor, which is handled by the sibling branch above)
458 Inkscape::Selection * const selection = sp_desktop_selection(desktop);
459 if (!(bevent.state & GDK_SHIFT_MASK) || sp_pen_context_has_waiting_LPE(pc)) {
460 /* if we have a waiting LPE, we need a fresh path to be created
461 so don't append to an existing one */
462 selection->clear();
463 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
464 } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
465 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
466 }
468 /* Create green anchor */
469 p = event_dt;
470 spdc_endpoint_snap(pc, p, bevent.state);
471 pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
472 }
473 spdc_pen_set_initial_point(pc, p);
474 } else {
476 /* Set end anchor */
477 pc->ea = anchor;
478 NR::Point p;
479 if (anchor) {
480 p = anchor->dp;
481 // we hit an anchor, will finish the curve (either with or without closing)
482 // in release handler
483 pc->state = SP_PEN_CONTEXT_CLOSE;
485 if (pc->green_anchor && pc->green_anchor->active) {
486 // we clicked on the current curve start, so close it even if
487 // we drag a handle away from it
488 dc->green_closed = TRUE;
489 }
490 ret = TRUE;
491 break;
493 } else {
494 p = event_dt;
495 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
496 spdc_pen_set_subsequent_point(pc, p, true);
497 if (pc->polylines_only) {
498 spdc_pen_finish_segment(pc, p, bevent.state);
499 }
500 }
501 }
503 pc->state = pc->polylines_only ? SP_PEN_CONTEXT_POINT : SP_PEN_CONTEXT_CONTROL;
504 ret = TRUE;
505 break;
506 case SP_PEN_CONTEXT_CONTROL:
507 g_warning("Button down in CONTROL state");
508 break;
509 case SP_PEN_CONTEXT_CLOSE:
510 g_warning("Button down in CLOSE state");
511 break;
512 default:
513 break;
514 }
515 break;
516 default:
517 break;
518 }
519 } else if (bevent.button == 3 || pc->expecting_clicks_for_LPE == 1) { // when the last click for a waiting LPE occurs we want to finish the path
520 if (pc->npoints != 0) {
522 spdc_pen_finish_segment(pc, event_dt, bevent.state);
523 if (pc->green_closed) {
524 // finishing at the start anchor, close curve
525 spdc_pen_finish(pc, TRUE);
526 } else {
527 // finishing at some other anchor, finish curve but not close
528 spdc_pen_finish(pc, FALSE);
529 }
531 ret = TRUE;
532 }
533 }
535 if (pc->expecting_clicks_for_LPE) {
536 --pc->expecting_clicks_for_LPE;
537 }
539 return ret;
540 }
542 /**
543 * Handle motion_notify event.
544 */
545 static gint
546 pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
547 {
548 gint ret = FALSE;
550 SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
551 SPDesktop * const dt = SP_EVENT_CONTEXT_DESKTOP(event_context);
553 if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
554 // allow scrolling
555 return FALSE;
556 }
558 if (pc->events_disabled) {
559 // skip motion events if pen events are disabled
560 return FALSE;
561 }
563 NR::Point const event_w(mevent.x,
564 mevent.y);
565 if (pen_within_tolerance) {
566 gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
567 "value", 0, 0, 100);
568 if ( NR::LInfty( event_w - pen_drag_origin_w ) < tolerance ) {
569 return FALSE; // Do not drag if we're within tolerance from origin.
570 }
571 }
572 // Once the user has moved farther than tolerance from the original location
573 // (indicating they intend to move the object, not click), then always process the
574 // motion notify coordinates as given (no snapping back to origin)
575 pen_within_tolerance = false;
577 /* Find desktop coordinates */
578 NR::Point p = dt->w2d(event_w);
580 /* Test, whether we hit any anchor */
581 SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
583 switch (pc->mode) {
584 case SP_PEN_CONTEXT_MODE_CLICK:
585 switch (pc->state) {
586 case SP_PEN_CONTEXT_POINT:
587 if ( pc->npoints != 0 ) {
588 /* Only set point, if we are already appending */
589 spdc_endpoint_snap(pc, p, mevent.state);
590 spdc_pen_set_subsequent_point(pc, p, true);
591 ret = TRUE;
592 }
593 break;
594 case SP_PEN_CONTEXT_CONTROL:
595 case SP_PEN_CONTEXT_CLOSE:
596 /* Placing controls is last operation in CLOSE state */
597 spdc_endpoint_snap(pc, p, mevent.state);
598 spdc_pen_set_ctrl(pc, p, mevent.state);
599 ret = TRUE;
600 break;
601 case SP_PEN_CONTEXT_STOP:
602 /* This is perfectly valid */
603 break;
604 default:
605 break;
606 }
607 break;
608 case SP_PEN_CONTEXT_MODE_DRAG:
609 switch (pc->state) {
610 case SP_PEN_CONTEXT_POINT:
611 if ( pc->npoints > 0 ) {
612 /* Only set point, if we are already appending */
614 if (!anchor) { /* Snap node only if not hitting anchor */
615 spdc_endpoint_snap(pc, p, mevent.state);
616 }
618 spdc_pen_set_subsequent_point(pc, p, !anchor);
620 if (anchor && !pc->anchor_statusbar) {
621 pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
622 pc->anchor_statusbar = true;
623 } else if (!anchor && pc->anchor_statusbar) {
624 pc->_message_context->clear();
625 pc->anchor_statusbar = false;
626 }
628 ret = TRUE;
629 } else {
630 if (anchor && !pc->anchor_statusbar) {
631 pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
632 pc->anchor_statusbar = true;
633 } else if (!anchor && pc->anchor_statusbar) {
634 pc->_message_context->clear();
635 pc->anchor_statusbar = false;
636 }
637 }
638 break;
639 case SP_PEN_CONTEXT_CONTROL:
640 case SP_PEN_CONTEXT_CLOSE:
641 /* Placing controls is last operation in CLOSE state */
643 // snap the handle
644 spdc_endpoint_snap_handle(pc, p, mevent.state);
646 if (!pc->polylines_only) {
647 spdc_pen_set_ctrl(pc, p, mevent.state);
648 } else {
649 spdc_pen_set_ctrl(pc, pc->p[1], mevent.state);
650 }
651 gobble_motion_events(GDK_BUTTON1_MASK);
652 ret = TRUE;
653 break;
654 case SP_PEN_CONTEXT_STOP:
655 /* This is perfectly valid */
656 break;
657 default:
658 break;
659 }
660 break;
661 default:
662 break;
663 }
664 return ret;
665 }
667 /**
668 * Handle mouse button release event.
669 */
670 static gint
671 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
672 {
673 if (pc->events_disabled) {
674 // skip event processing if events are disabled
675 return FALSE;
676 }
678 gint ret = FALSE;
679 SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
680 if ( revent.button == 1 && !event_context->space_panning) {
682 SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
684 NR::Point const event_w(revent.x,
685 revent.y);
686 /* Find desktop coordinates */
687 NR::Point p = pc->desktop->w2d(event_w);
689 /* Test whether we hit any anchor. */
690 SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
692 switch (pc->mode) {
693 case SP_PEN_CONTEXT_MODE_CLICK:
694 switch (pc->state) {
695 case SP_PEN_CONTEXT_POINT:
696 if ( pc->npoints == 0 ) {
697 /* Start new thread only with button release */
698 if (anchor) {
699 p = anchor->dp;
700 }
701 pc->sa = anchor;
702 spdc_pen_set_initial_point(pc, p);
703 } else {
704 /* Set end anchor here */
705 pc->ea = anchor;
706 if (anchor) {
707 p = anchor->dp;
708 }
709 }
710 pc->state = SP_PEN_CONTEXT_CONTROL;
711 ret = TRUE;
712 break;
713 case SP_PEN_CONTEXT_CONTROL:
714 /* End current segment */
715 spdc_endpoint_snap(pc, p, revent.state);
716 spdc_pen_finish_segment(pc, p, revent.state);
717 pc->state = SP_PEN_CONTEXT_POINT;
718 ret = TRUE;
719 break;
720 case SP_PEN_CONTEXT_CLOSE:
721 /* End current segment */
722 if (!anchor) { /* Snap node only if not hitting anchor */
723 spdc_endpoint_snap(pc, p, revent.state);
724 }
725 spdc_pen_finish_segment(pc, p, revent.state);
726 spdc_pen_finish(pc, TRUE);
727 pc->state = SP_PEN_CONTEXT_POINT;
728 ret = TRUE;
729 break;
730 case SP_PEN_CONTEXT_STOP:
731 /* This is allowed, if we just cancelled curve */
732 pc->state = SP_PEN_CONTEXT_POINT;
733 ret = TRUE;
734 break;
735 default:
736 break;
737 }
738 break;
739 case SP_PEN_CONTEXT_MODE_DRAG:
740 switch (pc->state) {
741 case SP_PEN_CONTEXT_POINT:
742 case SP_PEN_CONTEXT_CONTROL:
743 if (!pc->polylines_only) {
744 spdc_endpoint_snap(pc, p, revent.state);
745 spdc_pen_finish_segment(pc, p, revent.state);
746 }
747 break;
748 case SP_PEN_CONTEXT_CLOSE:
749 spdc_endpoint_snap(pc, p, revent.state);
750 spdc_pen_finish_segment(pc, p, revent.state);
751 if (pc->green_closed) {
752 // finishing at the start anchor, close curve
753 spdc_pen_finish(pc, TRUE);
754 } else {
755 // finishing at some other anchor, finish curve but not close
756 spdc_pen_finish(pc, FALSE);
757 }
758 break;
759 case SP_PEN_CONTEXT_STOP:
760 /* This is allowed, if we just cancelled curve */
761 break;
762 default:
763 break;
764 }
765 pc->state = SP_PEN_CONTEXT_POINT;
766 ret = TRUE;
767 break;
768 default:
769 break;
770 }
772 if (pc->grab) {
773 /* Release grab now */
774 sp_canvas_item_ungrab(pc->grab, revent.time);
775 pc->grab = NULL;
776 }
778 ret = TRUE;
780 dc->green_closed = FALSE;
781 }
783 // TODO: can we be sure that the path was created correctly?
784 // TODO: should we offer an option to collect the clicks in a list?
785 if (pc->expecting_clicks_for_LPE == 0 && sp_pen_context_has_waiting_LPE(pc)) {
786 pc->polylines_only = false;
788 SPEventContext *ec = SP_EVENT_CONTEXT(pc);
789 Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
791 if (pc->waiting_LPE) {
792 // we have an already created LPE waiting for a path
793 pc->waiting_LPE->acceptParamPath(SP_PATH(selection->singleItem()));
794 selection->add(SP_OBJECT(pc->waiting_item));
795 pc->waiting_LPE = NULL;
796 pc->polylines_only = false;
797 } else {
798 // the case that we need to create a new LPE and apply it to the just-drawn path is
799 // handled in spdc_check_for_and_apply_waiting_LPE() in draw-context.cpp
800 }
801 }
803 return ret;
804 }
806 static gint
807 pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent)
808 {
809 gint ret = FALSE;
810 if (pc->npoints != 0 && bevent.button != 2) {
811 spdc_pen_finish(pc, FALSE);
812 ret = TRUE;
813 }
814 return ret;
815 }
817 void
818 pen_redraw_all (SPPenContext *const pc)
819 {
820 // green
821 if (pc->green_bpaths) {
822 // remove old piecewise green canvasitems
823 while (pc->green_bpaths) {
824 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
825 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
826 }
827 // one canvas bpath for all of green_curve
828 SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
829 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
830 sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
832 pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
833 }
835 if (pc->green_anchor)
836 SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
838 pc->red_curve->reset();
839 pc->red_curve->moveto(pc->p[0]);
840 pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
841 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
843 // handles
844 if (pc->p[0] != pc->p[1]) {
845 SP_CTRL(pc->c1)->moveto(pc->p[1]);
846 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
847 sp_canvas_item_show (pc->c1);
848 sp_canvas_item_show (pc->cl1);
849 } else {
850 sp_canvas_item_hide (pc->c1);
851 sp_canvas_item_hide (pc->cl1);
852 }
854 Geom::Curve const * last_seg = pc->green_curve->last_segment();
855 if (last_seg) {
856 Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( last_seg );
857 if ( cubic &&
858 (*cubic)[2] != to_2geom(pc->p[0]) )
859 {
860 NR::Point p2 = from_2geom((*cubic)[2]);
861 SP_CTRL(pc->c0)->moveto(p2);
862 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), p2, pc->p[0]);
863 sp_canvas_item_show (pc->c0);
864 sp_canvas_item_show (pc->cl0);
865 } else {
866 sp_canvas_item_hide (pc->c0);
867 sp_canvas_item_hide (pc->cl0);
868 }
869 }
870 }
872 void
873 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
874 {
875 if (pc->npoints != 5)
876 return;
878 // green
879 if (!pc->green_curve->is_empty()) {
880 pc->green_curve->last_point_additive_move( Geom::Point(x,y) );
881 } else {
882 // start anchor too
883 if (pc->green_anchor) {
884 pc->green_anchor->dp += NR::Point(x, y);
885 }
886 }
888 // red
889 pc->p[0] += NR::Point(x, y);
890 pc->p[1] += NR::Point(x, y);
891 pen_redraw_all(pc);
892 }
894 void
895 pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
896 {
897 pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
898 }
900 void
901 pen_lastpoint_tocurve (SPPenContext *const pc)
902 {
903 if (pc->npoints != 5)
904 return;
906 Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() );
907 if ( cubic ) {
908 pc->p[1] = pc->p[0] + from_2geom( (*cubic)[3] - (*cubic)[2] );
909 } else {
910 pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
911 }
913 pen_redraw_all(pc);
914 }
916 void
917 pen_lastpoint_toline (SPPenContext *const pc)
918 {
919 if (pc->npoints != 5)
920 return;
922 pc->p[1] = pc->p[0];
924 pen_redraw_all(pc);
925 }
928 static gint
929 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
930 {
931 gint ret = FALSE;
932 gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
934 switch (get_group0_keyval (&event->key)) {
936 case GDK_Left: // move last point left
937 case GDK_KP_Left:
938 case GDK_KP_4:
939 if (!MOD__CTRL) { // not ctrl
940 if (MOD__ALT) { // alt
941 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift
942 else pen_lastpoint_move_screen(pc, -1, 0); // no shift
943 }
944 else { // no alt
945 if (MOD__SHIFT) pen_lastpoint_move(pc, -10*nudge, 0); // shift
946 else pen_lastpoint_move(pc, -nudge, 0); // no shift
947 }
948 ret = TRUE;
949 }
950 break;
951 case GDK_Up: // move last point up
952 case GDK_KP_Up:
953 case GDK_KP_8:
954 if (!MOD__CTRL) { // not ctrl
955 if (MOD__ALT) { // alt
956 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift
957 else pen_lastpoint_move_screen(pc, 0, 1); // no shift
958 }
959 else { // no alt
960 if (MOD__SHIFT) pen_lastpoint_move(pc, 0, 10*nudge); // shift
961 else pen_lastpoint_move(pc, 0, nudge); // no shift
962 }
963 ret = TRUE;
964 }
965 break;
966 case GDK_Right: // move last point right
967 case GDK_KP_Right:
968 case GDK_KP_6:
969 if (!MOD__CTRL) { // not ctrl
970 if (MOD__ALT) { // alt
971 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift
972 else pen_lastpoint_move_screen(pc, 1, 0); // no shift
973 }
974 else { // no alt
975 if (MOD__SHIFT) pen_lastpoint_move(pc, 10*nudge, 0); // shift
976 else pen_lastpoint_move(pc, nudge, 0); // no shift
977 }
978 ret = TRUE;
979 }
980 break;
981 case GDK_Down: // move last point down
982 case GDK_KP_Down:
983 case GDK_KP_2:
984 if (!MOD__CTRL) { // not ctrl
985 if (MOD__ALT) { // alt
986 if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift
987 else pen_lastpoint_move_screen(pc, 0, -1); // no shift
988 }
989 else { // no alt
990 if (MOD__SHIFT) pen_lastpoint_move(pc, 0, -10*nudge); // shift
991 else pen_lastpoint_move(pc, 0, -nudge); // no shift
992 }
993 ret = TRUE;
994 }
995 break;
997 case GDK_P:
998 case GDK_p:
999 if (MOD__SHIFT_ONLY) {
1000 sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PARALLEL, 2);
1001 ret = TRUE;
1002 }
1003 break;
1005 case GDK_C:
1006 case GDK_c:
1007 if (MOD__SHIFT_ONLY) {
1008 sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::CIRCLE_3PTS, 3);
1009 ret = TRUE;
1010 }
1011 break;
1013 case GDK_B:
1014 case GDK_b:
1015 if (MOD__SHIFT_ONLY) {
1016 sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PERP_BISECTOR, 2);
1017 ret = TRUE;
1018 }
1019 break;
1021 case GDK_A:
1022 case GDK_a:
1023 if (MOD__SHIFT_ONLY) {
1024 sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::ANGLE_BISECTOR, 3);
1025 ret = TRUE;
1026 }
1027 break;
1029 case GDK_U:
1030 case GDK_u:
1031 if (MOD__SHIFT_ONLY) {
1032 pen_lastpoint_tocurve(pc);
1033 ret = TRUE;
1034 }
1035 break;
1036 case GDK_L:
1037 case GDK_l:
1038 if (MOD__SHIFT_ONLY) {
1039 pen_lastpoint_toline(pc);
1040 ret = TRUE;
1041 }
1042 break;
1044 case GDK_Return:
1045 case GDK_KP_Enter:
1046 if (pc->npoints != 0) {
1047 spdc_pen_finish(pc, FALSE);
1048 ret = TRUE;
1049 }
1050 break;
1051 case GDK_Escape:
1052 if (pc->npoints != 0) {
1053 // if drawing, cancel, otherwise pass it up for deselecting
1054 pen_cancel (pc);
1055 ret = TRUE;
1056 }
1057 break;
1058 case GDK_z:
1059 case GDK_Z:
1060 if (MOD__CTRL_ONLY && pc->npoints != 0) {
1061 // if drawing, cancel, otherwise pass it up for undo
1062 pen_cancel (pc);
1063 ret = TRUE;
1064 }
1065 break;
1066 case GDK_g:
1067 case GDK_G:
1068 if (MOD__SHIFT_ONLY) {
1069 sp_selection_to_guides();
1070 ret = true;
1071 }
1072 break;
1073 case GDK_BackSpace:
1074 case GDK_Delete:
1075 case GDK_KP_Delete:
1076 if (pc->green_curve->is_empty()) {
1077 if (!pc->red_curve->is_empty()) {
1078 pen_cancel (pc);
1079 ret = TRUE;
1080 } else {
1081 // do nothing; this event should be handled upstream
1082 }
1083 } else {
1084 /* Reset red curve */
1085 pc->red_curve->reset();
1086 /* Destroy topmost green bpath */
1087 if (pc->green_bpaths) {
1088 if (pc->green_bpaths->data)
1089 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1090 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1091 }
1092 /* Get last segment */
1093 if ( pc->green_curve->is_empty() ) {
1094 g_warning("pen_handle_key_press, case GDK_KP_Delete: Green curve is empty");
1095 break;
1096 }
1097 // The code below assumes that pc->green_curve has only ONE path !
1098 Geom::Path const & path = pc->green_curve->get_pathvector().back();
1099 Geom::Curve const * crv = &path.back_default();
1100 pc->p[0] = crv->initialPoint();
1101 if ( Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>(crv)) {
1102 pc->p[1] = from_2geom( (*cubic)[1] );
1103 } else {
1104 pc->p[1] = pc->p[0];
1105 }
1106 NR::Point const pt(( pc->npoints < 4
1107 ? crv->finalPoint()
1108 : pc->p[3] ));
1109 pc->npoints = 2;
1110 pc->green_curve->backspace();
1111 sp_canvas_item_hide(pc->c0);
1112 sp_canvas_item_hide(pc->c1);
1113 sp_canvas_item_hide(pc->cl0);
1114 sp_canvas_item_hide(pc->cl1);
1115 pc->state = SP_PEN_CONTEXT_POINT;
1116 spdc_pen_set_subsequent_point(pc, pt, true);
1117 ret = TRUE;
1118 }
1119 break;
1120 default:
1121 break;
1122 }
1123 return ret;
1124 }
1126 static void
1127 spdc_reset_colors(SPPenContext *pc)
1128 {
1129 /* Red */
1130 pc->red_curve->reset();
1131 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1132 /* Blue */
1133 pc->blue_curve->reset();
1134 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
1135 /* Green */
1136 while (pc->green_bpaths) {
1137 gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1138 pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1139 }
1140 pc->green_curve->reset();
1141 if (pc->green_anchor) {
1142 pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1143 }
1144 pc->sa = NULL;
1145 pc->ea = NULL;
1146 pc->npoints = 0;
1147 pc->red_curve_is_valid = false;
1148 }
1151 static void
1152 spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
1153 {
1154 g_assert( pc->npoints == 0 );
1156 pc->p[0] = p;
1157 pc->p[1] = p;
1158 pc->npoints = 2;
1159 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1161 sp_canvas_force_full_redraw_after_interruptions(pc->desktop->canvas, 5);
1162 }
1164 /**
1165 * Show the status message for the current line/curve segment.
1166 * This type of message always shows angle/distance as the last
1167 * two parameters ("angle %3.2f°, distance %s").
1168 */
1169 static void
1170 spdc_pen_set_angle_distance_status_message(SPPenContext *const pc, NR::Point const p, int pc_point_to_compare, gchar const *message)
1171 {
1172 g_assert(pc != NULL);
1173 g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles
1174 g_assert(message != NULL);
1176 SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1177 NR::Point rel = p - pc->p[pc_point_to_compare];
1178 GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1179 double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1180 if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1181 angle = angle_to_compass (angle);
1183 pc->_message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist->str);
1184 g_string_free(dist, FALSE);
1185 }
1187 static void
1188 spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
1189 {
1190 g_assert( pc->npoints != 0 );
1191 /* todo: Check callers to see whether 2 <= npoints is guaranteed. */
1193 pc->p[2] = p;
1194 pc->p[3] = p;
1195 pc->p[4] = p;
1196 pc->npoints = 5;
1197 pc->red_curve->reset();
1198 pc->red_curve->moveto(pc->p[0]);
1199 bool is_curve;
1200 if (pc->p[1] != pc->p[0])
1201 {
1202 pc->red_curve->curveto(pc->p[1], p, p);
1203 is_curve = true;
1204 } else {
1205 pc->red_curve->lineto(p);
1206 is_curve = false;
1207 }
1209 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1211 if (statusbar) {
1212 gchar *message = is_curve ?
1213 _("<b>Curve segment</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path" ):
1214 _("<b>Line segment</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path");
1215 spdc_pen_set_angle_distance_status_message(pc, p, 0, message);
1216 }
1217 }
1219 static void
1220 spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
1221 {
1222 sp_canvas_item_show(pc->c1);
1223 sp_canvas_item_show(pc->cl1);
1225 if ( pc->npoints == 2 ) {
1226 pc->p[1] = p;
1227 sp_canvas_item_hide(pc->c0);
1228 sp_canvas_item_hide(pc->cl0);
1229 SP_CTRL(pc->c1)->moveto(pc->p[1]);
1230 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
1232 spdc_pen_set_angle_distance_status_message(pc, p, 0, _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle"));
1233 } else if ( pc->npoints == 5 ) {
1234 pc->p[4] = p;
1235 sp_canvas_item_show(pc->c0);
1236 sp_canvas_item_show(pc->cl0);
1237 bool is_symm = false;
1238 if ( ( ( pc->mode == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
1239 ( ( pc->mode == SP_PEN_CONTEXT_MODE_DRAG ) && !( state & GDK_SHIFT_MASK ) ) ) {
1240 NR::Point delta = p - pc->p[3];
1241 pc->p[2] = pc->p[3] - delta;
1242 is_symm = true;
1243 pc->red_curve->reset();
1244 pc->red_curve->moveto(pc->p[0]);
1245 pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
1246 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1247 }
1248 SP_CTRL(pc->c0)->moveto(pc->p[2]);
1249 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]);
1250 SP_CTRL(pc->c1)->moveto(pc->p[4]);
1251 sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]);
1253 gchar *message = is_symm ?
1254 _("<b>Curve handle, symmetric</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") :
1255 _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only");
1256 spdc_pen_set_angle_distance_status_message(pc, p, 3, message);
1257 } else {
1258 g_warning("Something bad happened - npoints is %d", pc->npoints);
1259 }
1260 }
1262 static void
1263 spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const /*p*/, guint const /*state*/)
1264 {
1265 if (!pc->red_curve->is_empty()) {
1266 pc->green_curve->append_continuous(pc->red_curve, 0.0625);
1267 SPCurve *curve = pc->red_curve->copy();
1268 /// \todo fixme:
1269 SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
1270 curve->unref();
1271 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
1273 pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
1275 pc->p[0] = pc->p[3];
1276 pc->p[1] = pc->p[4];
1277 pc->npoints = 2;
1279 pc->red_curve->reset();
1280 }
1281 }
1283 static void
1284 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
1285 {
1286 if (pc->expecting_clicks_for_LPE > 1) {
1287 // don't let the path be finished before we have collected the required number of mouse clicks
1288 return;
1289 }
1291 pen_disable_events(pc);
1293 SPDesktop *const desktop = pc->desktop;
1294 pc->_message_context->clear();
1295 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
1297 pc->red_curve->reset();
1298 spdc_concat_colors_and_flush(pc, closed);
1299 pc->sa = NULL;
1300 pc->ea = NULL;
1302 pc->npoints = 0;
1303 pc->state = SP_PEN_CONTEXT_POINT;
1305 sp_canvas_item_hide(pc->c0);
1306 sp_canvas_item_hide(pc->c1);
1307 sp_canvas_item_hide(pc->cl0);
1308 sp_canvas_item_hide(pc->cl1);
1310 if (pc->green_anchor) {
1311 pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1312 }
1315 sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
1317 pen_enable_events(pc);
1318 }
1320 static void
1321 pen_disable_events(SPPenContext *const pc) {
1322 pc->events_disabled++;
1323 }
1325 static void
1326 pen_enable_events(SPPenContext *const pc) {
1327 g_return_if_fail(pc->events_disabled != 0);
1329 pc->events_disabled--;
1330 }
1332 void
1333 sp_pen_context_wait_for_LPE_mouse_clicks(SPPenContext *pc, Inkscape::LivePathEffect::EffectType effect_type,
1334 unsigned int num_clicks, bool use_polylines)
1335 {
1336 g_print ("Now waiting for %s to be applied\n",
1337 Inkscape::LivePathEffect::LPETypeConverter.get_label(effect_type).c_str());
1338 pc->expecting_clicks_for_LPE = num_clicks;
1339 pc->polylines_only = use_polylines;
1340 pc->waiting_LPE_type = effect_type;
1341 }
1343 /*
1344 Local Variables:
1345 mode:c++
1346 c-file-style:"stroustrup"
1347 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1348 indent-tabs-mode:nil
1349 fill-column:99
1350 End:
1351 */
1352 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :