1 #define __SP_DRAW_CONTEXT_C__
3 /*
4 * Generic drawing context
5 *
6 * Author:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 *
9 * Copyright (C) 2000 Lauris Kaplinski
10 * Copyright (C) 2000-2001 Ximian, Inc.
11 * Copyright (C) 2002 Lauris Kaplinski
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #define DRAW_VERBOSE
18 #ifdef HAVE_CONFIG_H
19 # include "config.h"
20 #endif
21 #include <gdk/gdkkeysyms.h>
23 #include "display/canvas-bpath.h"
24 #include "xml/repr.h"
25 #include "svg/svg.h"
26 #include <glibmm/i18n.h>
27 #include "display/curve.h"
28 #include "desktop.h"
29 #include "desktop-affine.h"
30 #include "desktop-handles.h"
31 #include "desktop-style.h"
32 #include "document.h"
33 #include "draw-anchor.h"
34 #include "macros.h"
35 #include "message-stack.h"
36 #include "pen-context.h"
37 #include "prefs-utils.h"
38 #include "selection.h"
39 #include "selection-chemistry.h"
40 #include "snap.h"
41 #include "sp-path.h"
42 #include "sp-namedview.h"
43 #include "live_effects/lpe-patternalongpath.h"
44 #include "style.h"
46 static void sp_draw_context_class_init(SPDrawContextClass *klass);
47 static void sp_draw_context_init(SPDrawContext *dc);
48 static void sp_draw_context_dispose(GObject *object);
50 static void sp_draw_context_setup(SPEventContext *ec);
51 static void sp_draw_context_set(SPEventContext *ec, gchar const *key, gchar const *value);
52 static void sp_draw_context_finish(SPEventContext *ec);
54 static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);
56 static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);
57 static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);
59 static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);
61 static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);
63 static void spdc_reset_white(SPDrawContext *dc);
64 static void spdc_free_colors(SPDrawContext *dc);
67 static SPEventContextClass *draw_parent_class;
70 GType
71 sp_draw_context_get_type(void)
72 {
73 static GType type = 0;
74 if (!type) {
75 GTypeInfo info = {
76 sizeof(SPDrawContextClass),
77 NULL, NULL,
78 (GClassInitFunc) sp_draw_context_class_init,
79 NULL, NULL,
80 sizeof(SPDrawContext),
81 4,
82 (GInstanceInitFunc) sp_draw_context_init,
83 NULL, /* value_table */
84 };
85 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);
86 }
87 return type;
88 }
90 static void
91 sp_draw_context_class_init(SPDrawContextClass *klass)
92 {
93 GObjectClass *object_class;
94 SPEventContextClass *ec_class;
96 object_class = (GObjectClass *)klass;
97 ec_class = (SPEventContextClass *) klass;
99 draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
101 object_class->dispose = sp_draw_context_dispose;
103 ec_class->setup = sp_draw_context_setup;
104 ec_class->set = sp_draw_context_set;
105 ec_class->finish = sp_draw_context_finish;
106 ec_class->root_handler = sp_draw_context_root_handler;
107 }
109 static void
110 sp_draw_context_init(SPDrawContext *dc)
111 {
112 dc->attach = FALSE;
114 dc->red_color = 0xff00007f;
115 dc->blue_color = 0x0000ff7f;
116 dc->green_color = 0x00ff007f;
117 dc->red_curve_is_valid = false;
119 dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
121 new (&dc->sel_changed_connection) sigc::connection();
122 new (&dc->sel_modified_connection) sigc::connection();
123 }
125 static void
126 sp_draw_context_dispose(GObject *object)
127 {
128 SPDrawContext *dc = SP_DRAW_CONTEXT(object);
130 dc->sel_changed_connection.~connection();
131 dc->sel_modified_connection.~connection();
133 if (dc->grab) {
134 sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
135 dc->grab = NULL;
136 }
138 if (dc->selection) {
139 dc->selection = NULL;
140 }
142 dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
144 spdc_free_colors(dc);
146 G_OBJECT_CLASS(draw_parent_class)->dispose(object);
147 }
149 static void
150 sp_draw_context_setup(SPEventContext *ec)
151 {
152 SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
153 SPDesktop *dt = ec->desktop;
155 if (((SPEventContextClass *) draw_parent_class)->setup) {
156 ((SPEventContextClass *) draw_parent_class)->setup(ec);
157 }
159 dc->selection = sp_desktop_selection(dt);
161 /* Connect signals to track selection changes */
162 dc->sel_changed_connection = dc->selection->connectChanged(
163 sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
164 );
165 dc->sel_modified_connection = dc->selection->connectModified(
166 sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
167 );
169 /* Create red bpath */
170 dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
171 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
172 /* Create red curve */
173 dc->red_curve = new SPCurve();
175 /* Create blue bpath */
176 dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
177 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
178 /* Create blue curve */
179 dc->blue_curve = new SPCurve();
181 /* Create green curve */
182 dc->green_curve = new SPCurve();
183 /* No green anchor by default */
184 dc->green_anchor = NULL;
185 dc->green_closed = FALSE;
187 dc->attach = TRUE;
188 spdc_attach_selection(dc, dc->selection);
189 }
191 static void
192 sp_draw_context_finish(SPEventContext *ec)
193 {
194 SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
196 dc->sel_changed_connection.disconnect();
197 dc->sel_modified_connection.disconnect();
199 if (dc->grab) {
200 sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
201 }
203 if (dc->selection) {
204 dc->selection = NULL;
205 }
207 spdc_free_colors(dc);
208 }
210 static void
211 sp_draw_context_set(SPEventContext */*ec*/, const gchar */*key*/, const gchar */*value*/)
212 {
213 }
215 gint
216 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
217 {
218 gint ret = FALSE;
220 switch (event->type) {
221 case GDK_KEY_PRESS:
222 switch (get_group0_keyval (&event->key)) {
223 case GDK_Up:
224 case GDK_Down:
225 case GDK_KP_Up:
226 case GDK_KP_Down:
227 // prevent the zoom field from activation
228 if (!MOD__CTRL_ONLY) {
229 ret = TRUE;
230 }
231 break;
232 default:
233 break;
234 }
235 break;
236 default:
237 break;
238 }
240 if (!ret) {
241 if (((SPEventContextClass *) draw_parent_class)->root_handler) {
242 ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
243 }
244 }
246 return ret;
247 }
249 static char const *
250 tool_name(SPDrawContext *dc)
251 {
252 return ( SP_IS_PEN_CONTEXT(dc)
253 ? "tools.freehand.pen"
254 : "tools.freehand.pencil" );
255 }
257 static void
258 spdc_paste_curve_as_freehand_shape(const SPCurve *c, SPDrawContext *dc, SPItem *item)
259 {
260 using namespace Inkscape::LivePathEffect;
262 // TODO: Don't paste path if nothing is on the clipboard
264 Effect::createAndApply(Inkscape::LivePathEffect::FREEHAND_SHAPE, dc->desktop->doc(), item);
265 Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
266 gchar *svgd = sp_svg_write_path(c->get_pathvector());
267 static_cast<LPEPatternAlongPath*>(lpe)->pattern.paste_param_path(svgd);
268 }
270 /*
271 * If we have an item and a waiting LPE, apply the effect to the item
272 * (spiro spline mode is treated separately)
273 */
274 void
275 spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item)
276 {
277 using namespace Inkscape::LivePathEffect;
279 if (item && SP_IS_LPE_ITEM(item)) {
280 if (prefs_get_int_attribute(tool_name(dc), "freehand-mode", 0) == 1) {
281 Effect::createAndApply(SPIRO, dc->desktop->doc(), item);
282 }
284 int shape = prefs_get_int_attribute(tool_name(dc), "shape", 0);
285 bool shape_applied = false;
286 SPCSSAttr *css_item = sp_css_attr_from_object (SP_OBJECT(item), SP_STYLE_FLAG_ALWAYS);
287 const char *cstroke = sp_repr_css_property(css_item, "stroke", "none");
289 #define SHAPE_LENGTH 100
290 #define SHAPE_HEIGHT 10
292 switch (shape) {
293 case 0:
294 // don't apply any shape
295 break;
296 case 1:
297 {
298 // "triangle in"
299 // TODO: this is only for illustration (we create a "decrescendo"-shaped path
300 // manually; eventually we should read the path from a separate file)
301 SPCurve *c = new SPCurve();
302 c->moveto(0,0);
303 c->lineto(0, SHAPE_HEIGHT);
304 c->lineto(SHAPE_LENGTH, SHAPE_HEIGHT/2);
305 c->closepath();
306 spdc_paste_curve_as_freehand_shape(c, dc, item);
307 c->unref();
309 shape_applied = true;
310 break;
311 }
312 case 2:
313 {
314 // "triangle out"
315 SPCurve *c = new SPCurve();
316 c->moveto(0, SHAPE_HEIGHT/2);
317 c->lineto(SHAPE_LENGTH, SHAPE_HEIGHT);
318 c->lineto(SHAPE_LENGTH, 0);
319 c->closepath();
320 spdc_paste_curve_as_freehand_shape(c, dc, item);
321 c->unref();
323 shape_applied = true;
324 break;
325 }
326 case 3:
327 {
328 // "ellipse"
329 SPCurve *c = new SPCurve();
330 const double C1 = 0.552;
331 c->moveto(0, SHAPE_HEIGHT/2);
332 c->curveto(0, (1 - C1) * SHAPE_HEIGHT/2, (1 - C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH/2, 0);
333 c->curveto((1 + C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH, (1 - C1) * SHAPE_HEIGHT/2, SHAPE_LENGTH, SHAPE_HEIGHT/2);
334 c->curveto(SHAPE_LENGTH, (1 + C1) * SHAPE_HEIGHT/2, (1 + C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, SHAPE_LENGTH/2, SHAPE_HEIGHT);
335 c->curveto((1 - C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, 0, (1 + C1) * SHAPE_HEIGHT/2, 0, SHAPE_HEIGHT/2);
336 c->closepath();
337 spdc_paste_curve_as_freehand_shape(c, dc, item);
338 c->unref();
339 shape_applied = true;
340 break;
341 }
342 case 4:
343 {
344 // take shape from clipboard; TODO: catch the case where clipboard is empty
345 Effect::createAndApply(FREEHAND_SHAPE, dc->desktop->doc(), item);
346 Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
347 static_cast<LPEPatternAlongPath*>(lpe)->pattern.on_paste_button_click();
349 shape_applied = true;
350 break;
351 }
352 default:
353 break;
354 }
355 if (shape_applied) {
356 // apply original stroke color as fill and unset stroke; then return
357 SPCSSAttr *css = sp_repr_css_attr_new();
358 sp_repr_css_set_property (css, "fill", cstroke);
359 sp_repr_css_set_property (css, "stroke", "none");
360 sp_desktop_apply_css_recursive(SP_OBJECT(item), css, true);
361 sp_repr_css_attr_unref(css);
362 return;
363 }
365 if (dc->waiting_LPE_type != INVALID_LPE) {
366 Effect::createAndApply(dc->waiting_LPE_type, dc->desktop->doc(), item);
367 dc->waiting_LPE_type = INVALID_LPE;
368 }
369 if (SP_IS_PEN_CONTEXT(dc)) {
370 SP_PEN_CONTEXT(dc)->polylines_only = (prefs_get_int_attribute("tools.freehand.pen", "freehand-mode", 0) == 2);
371 }
372 }
373 }
375 /*
376 * Selection handlers
377 */
379 static void
380 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
381 {
382 if (dc->attach) {
383 spdc_attach_selection(dc, sel);
384 }
385 }
387 /* fixme: We have to ensure this is not delayed (Lauris) */
389 static void
390 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
391 {
392 if (dc->attach) {
393 spdc_attach_selection(dc, sel);
394 }
395 }
397 static void
398 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
399 {
400 /* We reset white and forget white/start/end anchors */
401 spdc_reset_white(dc);
402 dc->sa = NULL;
403 dc->ea = NULL;
405 SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
407 if ( item && SP_IS_PATH(item) ) {
408 /* Create new white data */
409 /* Item */
410 dc->white_item = item;
411 /* Curve list */
412 /* We keep it in desktop coordinates to eliminate calculation errors */
413 SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
414 norm->transform(sp_item_i2d_affine(dc->white_item));
415 g_return_if_fail( norm != NULL );
416 dc->white_curves = g_slist_reverse(norm->split());
417 norm->unref();
418 /* Anchor list */
419 for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
420 SPCurve *c;
421 c = (SPCurve*)l->data;
422 g_return_if_fail( c->get_segment_count() > 0 );
423 if ( !c->is_closed() ) {
424 SPDrawAnchor *a;
425 a = sp_draw_anchor_new(dc, c, TRUE, c->first_point());
426 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
427 a = sp_draw_anchor_new(dc, c, FALSE, c->last_point());
428 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
429 }
430 }
431 /* fixme: recalculate active anchor? */
432 }
433 }
436 /**
437 * Snaps node or handle to PI/rotationsnapsperpi degree increments.
438 *
439 * \param dc draw context
440 * \param p cursor point (to be changed by snapping)
441 * \param o origin point
442 * \param state keyboard state to check if ctrl was pressed
443 */
445 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
446 guint state)
447 {
448 unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
449 /* 0 means no snapping. */
451 /* mirrored by fabs, so this corresponds to 15 degrees */
452 NR::Point best; /* best solution */
453 double bn = NR_HUGE; /* best normal */
454 double bdot = 0;
455 NR::Point v = NR::Point(0, 1);
456 double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
457 double const r10 = -r01, r11 = r00;
459 NR::Point delta = p - o;
461 for (unsigned i = 0; i < snaps; i++) {
462 double const ndot = fabs(dot(v,NR::rot90(delta)));
463 NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
464 r10*v[NR::X] + r11*v[NR::Y]);
465 if (ndot < bn) {
466 /* I think it is better numerically to use the normal, rather than the dot product
467 * to assess solutions, but I haven't proven it. */
468 bn = ndot;
469 best = v;
470 bdot = dot(v, delta);
471 }
472 v = t;
473 }
475 if (fabs(bdot) > 0) {
476 p = o + bdot * best;
478 if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
479 //After all, the user explicitely asked for angular snapping by
480 //pressing CTRL
481 /* Snap it along best vector */
482 SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
483 m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
484 m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
485 }
486 }
487 }
490 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const /*state*/)
491 {
492 SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
493 m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
494 m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
495 }
497 static SPCurve *
498 reverse_then_unref(SPCurve *orig)
499 {
500 SPCurve *ret = orig->create_reverse();
501 orig->unref();
502 return ret;
503 }
505 /**
506 * Concats red, blue and green.
507 * If any anchors are defined, process these, optionally removing curves from white list
508 * Invoke _flush_white to write result back to object.
509 */
510 void
511 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
512 {
513 /* Concat RBG */
514 SPCurve *c = dc->green_curve;
516 /* Green */
517 dc->green_curve = new SPCurve();
518 while (dc->green_bpaths) {
519 gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
520 dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
521 }
522 /* Blue */
523 c->append_continuous(dc->blue_curve, 0.0625);
524 dc->blue_curve->reset();
525 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
526 /* Red */
527 if (dc->red_curve_is_valid) {
528 c->append_continuous(dc->red_curve, 0.0625);
529 }
530 dc->red_curve->reset();
531 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
533 if (c->is_empty()) {
534 c->unref();
535 return;
536 }
538 /* Step A - test, whether we ended on green anchor */
539 if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
540 // We hit green anchor, closing Green-Blue-Red
541 SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
542 c->closepath_current();
543 /* Closed path, just flush */
544 spdc_flush_white(dc, c);
545 c->unref();
546 return;
547 }
549 /* Step B - both start and end anchored to same curve */
550 if ( dc->sa && dc->ea
551 && ( dc->sa->curve == dc->ea->curve )
552 && ( ( dc->sa != dc->ea )
553 || dc->sa->curve->is_closed() ) )
554 {
555 // We hit bot start and end of single curve, closing paths
556 SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
557 if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
558 c = reverse_then_unref(c);
559 }
560 dc->sa->curve->append_continuous(c, 0.0625);
561 c->unref();
562 dc->sa->curve->closepath_current();
563 spdc_flush_white(dc, NULL);
564 return;
565 }
567 /* Step C - test start */
568 if (dc->sa) {
569 SPCurve *s = dc->sa->curve;
570 dc->white_curves = g_slist_remove(dc->white_curves, s);
571 if (dc->sa->start) {
572 s = reverse_then_unref(s);
573 }
574 s->append_continuous(c, 0.0625);
575 c->unref();
576 c = s;
577 } else /* Step D - test end */ if (dc->ea) {
578 SPCurve *e = dc->ea->curve;
579 dc->white_curves = g_slist_remove(dc->white_curves, e);
580 if (!dc->ea->start) {
581 e = reverse_then_unref(e);
582 }
583 c->append_continuous(e, 0.0625);
584 e->unref();
585 }
588 spdc_flush_white(dc, c);
590 c->unref();
591 }
593 /*
594 * Flushes white curve(s) and additional curve into object
595 *
596 * No cleaning of colored curves - this has to be done by caller
597 * No rereading of white data, so if you cannot rely on ::modified, do it in caller
598 *
599 */
601 static void
602 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
603 {
604 SPCurve *c;
606 if (dc->white_curves) {
607 g_assert(dc->white_item);
608 c = SPCurve::concat(dc->white_curves);
609 g_slist_free(dc->white_curves);
610 dc->white_curves = NULL;
611 if (gc) {
612 c->append(gc, FALSE);
613 }
614 } else if (gc) {
615 c = gc;
616 c->ref();
617 } else {
618 return;
619 }
621 /* Now we have to go back to item coordinates at last */
622 c->transform(( dc->white_item
623 ? sp_item_dt2i_affine(dc->white_item)
624 : to_2geom(sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc))) ));
626 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
627 SPDocument *doc = sp_desktop_document(desktop);
628 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
630 if ( c && !c->is_empty() ) {
631 /* We actually have something to write */
633 bool has_lpe = false;
634 Inkscape::XML::Node *repr;
635 if (dc->white_item) {
636 repr = SP_OBJECT_REPR(dc->white_item);
637 has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
638 } else {
639 repr = xml_doc->createElement("svg:path");
640 /* Set style */
641 sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
642 }
644 gchar *str = sp_svg_write_path( c->get_pathvector() );
645 g_assert( str != NULL );
646 if (has_lpe)
647 repr->setAttribute("inkscape:original-d", str);
648 else
649 repr->setAttribute("d", str);
650 g_free(str);
652 if (!dc->white_item) {
653 /* Attach repr */
654 SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
655 dc->selection->set(repr);
656 Inkscape::GC::release(repr);
657 item->transform = from_2geom(i2i_affine(desktop->currentRoot(), desktop->currentLayer()));
658 item->updateRepr();
659 }
662 // we finished the path; now apply any waiting LPEs or freehand shapes
663 // FIXME: placing this here seems to cause issues with undo!
664 spdc_check_for_and_apply_waiting_LPE(dc, dc->selection->singleItem());
666 sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
667 _("Draw path"));
669 // When quickly drawing several subpaths with Shift, the next subpath may be finished and
670 // flushed before the selection_modified signal is fired by the previous change, which
671 // results in the tool losing all of the selected path's curve except that last subpath. To
672 // fix this, we force the selection_modified callback now, to make sure the tool's curve is
673 // in sync immediately.
674 spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
675 }
677 c->unref();
679 /* Flush pending updates */
680 sp_document_ensure_up_to_date(doc);
681 }
683 /**
684 * Returns FIRST active anchor (the activated one).
685 */
686 SPDrawAnchor *
687 spdc_test_inside(SPDrawContext *dc, NR::Point p)
688 {
689 SPDrawAnchor *active = NULL;
691 /* Test green anchor */
692 if (dc->green_anchor) {
693 active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
694 }
696 for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
697 SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
698 if ( !active && na ) {
699 active = na;
700 }
701 }
703 return active;
704 }
706 static void
707 spdc_reset_white(SPDrawContext *dc)
708 {
709 if (dc->white_item) {
710 /* We do not hold refcount */
711 dc->white_item = NULL;
712 }
713 while (dc->white_curves) {
714 reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
715 dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
716 }
717 while (dc->white_anchors) {
718 sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
719 dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
720 }
721 }
723 static void
724 spdc_free_colors(SPDrawContext *dc)
725 {
726 /* Red */
727 if (dc->red_bpath) {
728 gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
729 dc->red_bpath = NULL;
730 }
731 if (dc->red_curve) {
732 dc->red_curve = dc->red_curve->unref();
733 }
734 /* Blue */
735 if (dc->blue_bpath) {
736 gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
737 dc->blue_bpath = NULL;
738 }
739 if (dc->blue_curve) {
740 dc->blue_curve = dc->blue_curve->unref();
741 }
742 /* Green */
743 while (dc->green_bpaths) {
744 gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
745 dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
746 }
747 if (dc->green_curve) {
748 dc->green_curve = dc->green_curve->unref();
749 }
750 if (dc->green_anchor) {
751 dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
752 }
753 /* White */
754 if (dc->white_item) {
755 /* We do not hold refcount */
756 dc->white_item = NULL;
757 }
758 while (dc->white_curves) {
759 reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
760 dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
761 }
762 while (dc->white_anchors) {
763 sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
764 dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
765 }
766 }
769 /*
770 Local Variables:
771 mode:c++
772 c-file-style:"stroustrup"
773 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
774 indent-tabs-mode:nil
775 fill-column:99
776 End:
777 */
778 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :