1 /*
2 * Generic drawing context
3 *
4 * Author:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * Abhishek Sharma
7 *
8 * Copyright (C) 2000 Lauris Kaplinski
9 * Copyright (C) 2000-2001 Ximian, Inc.
10 * Copyright (C) 2002 Lauris Kaplinski
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #define DRAW_VERBOSE
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
20 #include <gdk/gdkkeysyms.h>
22 #include "display/canvas-bpath.h"
23 #include "xml/repr.h"
24 #include "svg/svg.h"
25 #include <glibmm/i18n.h>
26 #include "display/curve.h"
27 #include "desktop.h"
28 #include "desktop-handles.h"
29 #include "desktop-style.h"
30 #include "document.h"
31 #include "draw-anchor.h"
32 #include "macros.h"
33 #include "message-stack.h"
34 #include "pen-context.h"
35 #include "lpe-tool-context.h"
36 #include "preferences.h"
37 #include "selection.h"
38 #include "selection-chemistry.h"
39 #include "snap.h"
40 #include "sp-path.h"
41 #include "sp-namedview.h"
42 #include "live_effects/lpe-patternalongpath.h"
43 #include "style.h"
45 using Inkscape::DocumentUndo;
47 static void sp_draw_context_class_init(SPDrawContextClass *klass);
48 static void sp_draw_context_init(SPDrawContext *dc);
49 static void sp_draw_context_dispose(GObject *object);
51 static void sp_draw_context_setup(SPEventContext *ec);
52 static void sp_draw_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
53 static void sp_draw_context_finish(SPEventContext *ec);
55 static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);
57 static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);
58 static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);
60 static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);
62 static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);
64 static void spdc_reset_white(SPDrawContext *dc);
65 static void spdc_free_colors(SPDrawContext *dc);
68 static SPEventContextClass *draw_parent_class;
71 GType
72 sp_draw_context_get_type(void)
73 {
74 static GType type = 0;
75 if (!type) {
76 GTypeInfo info = {
77 sizeof(SPDrawContextClass),
78 NULL, NULL,
79 (GClassInitFunc) sp_draw_context_class_init,
80 NULL, NULL,
81 sizeof(SPDrawContext),
82 4,
83 (GInstanceInitFunc) sp_draw_context_init,
84 NULL, /* value_table */
85 };
86 type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);
87 }
88 return type;
89 }
91 static void
92 sp_draw_context_class_init(SPDrawContextClass *klass)
93 {
94 GObjectClass *object_class;
95 SPEventContextClass *ec_class;
97 object_class = (GObjectClass *)klass;
98 ec_class = (SPEventContextClass *) klass;
100 draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
102 object_class->dispose = sp_draw_context_dispose;
104 ec_class->setup = sp_draw_context_setup;
105 ec_class->set = sp_draw_context_set;
106 ec_class->finish = sp_draw_context_finish;
107 ec_class->root_handler = sp_draw_context_root_handler;
108 }
110 static void
111 sp_draw_context_init(SPDrawContext *dc)
112 {
113 dc->attach = FALSE;
115 dc->red_color = 0xff00007f;
116 dc->blue_color = 0x0000ff7f;
117 dc->green_color = 0x00ff007f;
118 dc->red_curve_is_valid = false;
120 dc->red_bpath = NULL;
121 dc->red_curve = NULL;
123 dc->blue_bpath = NULL;
124 dc->blue_curve = NULL;
126 dc->green_bpaths = NULL;
127 dc->green_curve = NULL;
128 dc->green_anchor = NULL;
129 dc->green_closed = false;
131 dc->white_item = NULL;
132 dc->white_curves = NULL;
133 dc->white_anchors = NULL;
135 dc->sa = NULL;
136 dc->ea = NULL;
138 dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
140 new (&dc->sel_changed_connection) sigc::connection();
141 new (&dc->sel_modified_connection) sigc::connection();
142 }
144 static void
145 sp_draw_context_dispose(GObject *object)
146 {
147 SPDrawContext *dc = SP_DRAW_CONTEXT(object);
149 dc->sel_changed_connection.~connection();
150 dc->sel_modified_connection.~connection();
152 if (dc->grab) {
153 sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
154 dc->grab = NULL;
155 }
157 if (dc->selection) {
158 dc->selection = NULL;
159 }
161 spdc_free_colors(dc);
163 G_OBJECT_CLASS(draw_parent_class)->dispose(object);
164 }
166 static void
167 sp_draw_context_setup(SPEventContext *ec)
168 {
169 SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
170 SPDesktop *dt = ec->desktop;
172 if (((SPEventContextClass *) draw_parent_class)->setup) {
173 ((SPEventContextClass *) draw_parent_class)->setup(ec);
174 }
176 dc->selection = sp_desktop_selection(dt);
178 /* Connect signals to track selection changes */
179 dc->sel_changed_connection = dc->selection->connectChanged(
180 sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
181 );
182 dc->sel_modified_connection = dc->selection->connectModified(
183 sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
184 );
186 /* Create red bpath */
187 dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
188 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
189 /* Create red curve */
190 dc->red_curve = new SPCurve();
192 /* Create blue bpath */
193 dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
194 sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
195 /* Create blue curve */
196 dc->blue_curve = new SPCurve();
198 /* Create green curve */
199 dc->green_curve = new SPCurve();
200 /* No green anchor by default */
201 dc->green_anchor = NULL;
202 dc->green_closed = FALSE;
204 dc->attach = TRUE;
205 spdc_attach_selection(dc, dc->selection);
206 }
208 static void
209 sp_draw_context_finish(SPEventContext *ec)
210 {
211 SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
213 dc->sel_changed_connection.disconnect();
214 dc->sel_modified_connection.disconnect();
216 if (dc->grab) {
217 sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
218 }
220 if (dc->selection) {
221 dc->selection = NULL;
222 }
224 spdc_free_colors(dc);
225 }
227 static void
228 sp_draw_context_set(SPEventContext */*ec*/, Inkscape::Preferences::Entry */*val*/)
229 {
230 }
232 gint
233 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
234 {
235 gint ret = FALSE;
237 switch (event->type) {
238 case GDK_KEY_PRESS:
239 switch (get_group0_keyval (&event->key)) {
240 case GDK_Up:
241 case GDK_Down:
242 case GDK_KP_Up:
243 case GDK_KP_Down:
244 // prevent the zoom field from activation
245 if (!MOD__CTRL_ONLY) {
246 ret = TRUE;
247 }
248 break;
249 default:
250 break;
251 }
252 break;
253 default:
254 break;
255 }
257 if (!ret) {
258 if (((SPEventContextClass *) draw_parent_class)->root_handler) {
259 ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
260 }
261 }
263 return ret;
264 }
266 static Glib::ustring const
267 tool_name(SPDrawContext *dc)
268 {
269 return ( SP_IS_PEN_CONTEXT(dc)
270 ? "/tools/freehand/pen"
271 : "/tools/freehand/pencil" );
272 }
274 static void
275 spdc_paste_curve_as_freehand_shape(const SPCurve *c, SPDrawContext *dc, SPItem *item)
276 {
277 using namespace Inkscape::LivePathEffect;
279 // TODO: Don't paste path if nothing is on the clipboard
281 Effect::createAndApply(PATTERN_ALONG_PATH, dc->desktop->doc(), item);
282 Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
283 gchar *svgd = sp_svg_write_path(c->get_pathvector());
284 static_cast<LPEPatternAlongPath*>(lpe)->pattern.paste_param_path(svgd);
285 }
287 /*
288 * If we have an item and a waiting LPE, apply the effect to the item
289 * (spiro spline mode is treated separately)
290 */
291 void
292 spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item)
293 {
294 using namespace Inkscape::LivePathEffect;
295 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
297 if (item && SP_IS_LPE_ITEM(item)) {
298 if (prefs->getInt(tool_name(dc) + "/freehand-mode", 0) == 1) {
299 Effect::createAndApply(SPIRO, dc->desktop->doc(), item);
300 }
302 int shape = prefs->getInt(tool_name(dc) + "/shape", 0);
303 bool shape_applied = false;
304 SPCSSAttr *css_item = sp_css_attr_from_object (SP_OBJECT(item), SP_STYLE_FLAG_ALWAYS);
305 const char *cstroke = sp_repr_css_property(css_item, "stroke", "none");
307 #define SHAPE_LENGTH 10
308 #define SHAPE_HEIGHT 10
310 switch (shape) {
311 case 0:
312 // don't apply any shape
313 break;
314 case 1:
315 {
316 // "triangle in"
317 // TODO: this is only for illustration (we create a "decrescendo"-shaped path
318 // manually; eventually we should read the path from a separate file)
319 SPCurve *c = new SPCurve();
320 c->moveto(0,0);
321 c->lineto(0, SHAPE_HEIGHT);
322 c->lineto(SHAPE_LENGTH, SHAPE_HEIGHT/2);
323 c->closepath();
324 spdc_paste_curve_as_freehand_shape(c, dc, item);
325 c->unref();
327 shape_applied = true;
328 break;
329 }
330 case 2:
331 {
332 // "triangle out"
333 SPCurve *c = new SPCurve();
334 c->moveto(0, SHAPE_HEIGHT/2);
335 c->lineto(SHAPE_LENGTH, SHAPE_HEIGHT);
336 c->lineto(SHAPE_LENGTH, 0);
337 c->closepath();
338 spdc_paste_curve_as_freehand_shape(c, dc, item);
339 c->unref();
341 shape_applied = true;
342 break;
343 }
344 case 3:
345 {
346 // "ellipse"
347 SPCurve *c = new SPCurve();
348 const double C1 = 0.552;
349 c->moveto(0, SHAPE_HEIGHT/2);
350 c->curveto(0, (1 - C1) * SHAPE_HEIGHT/2, (1 - C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH/2, 0);
351 c->curveto((1 + C1) * SHAPE_LENGTH/2, 0, SHAPE_LENGTH, (1 - C1) * SHAPE_HEIGHT/2, SHAPE_LENGTH, SHAPE_HEIGHT/2);
352 c->curveto(SHAPE_LENGTH, (1 + C1) * SHAPE_HEIGHT/2, (1 + C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, SHAPE_LENGTH/2, SHAPE_HEIGHT);
353 c->curveto((1 - C1) * SHAPE_LENGTH/2, SHAPE_HEIGHT, 0, (1 + C1) * SHAPE_HEIGHT/2, 0, SHAPE_HEIGHT/2);
354 c->closepath();
355 spdc_paste_curve_as_freehand_shape(c, dc, item);
356 c->unref();
357 shape_applied = true;
358 break;
359 }
360 case 4:
361 {
362 // take shape from clipboard; TODO: catch the case where clipboard is empty
363 Effect::createAndApply(PATTERN_ALONG_PATH, dc->desktop->doc(), item);
364 Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
365 static_cast<LPEPatternAlongPath*>(lpe)->pattern.on_paste_button_click();
367 shape_applied = true;
368 break;
369 }
370 default:
371 break;
372 }
373 if (shape_applied) {
374 // apply original stroke color as fill and unset stroke; then return
375 SPCSSAttr *css = sp_repr_css_attr_new();
377 if (!strcmp(cstroke, "none")){
378 sp_repr_css_set_property (css, "fill", "black");
379 } else {
380 sp_repr_css_set_property (css, "fill", cstroke);
381 }
382 sp_repr_css_set_property (css, "stroke", "none");
383 sp_desktop_apply_css_recursive(SP_OBJECT(item), css, true);
384 sp_repr_css_attr_unref(css);
385 return;
386 }
388 if (dc->waiting_LPE_type != INVALID_LPE) {
389 Effect::createAndApply(dc->waiting_LPE_type, dc->desktop->doc(), item);
390 dc->waiting_LPE_type = INVALID_LPE;
392 if (SP_IS_LPETOOL_CONTEXT(dc)) {
393 // since a geometric LPE was applied, we switch back to "inactive" mode
394 lpetool_context_switch_mode(SP_LPETOOL_CONTEXT(dc), INVALID_LPE);
395 }
396 }
397 if (SP_IS_PEN_CONTEXT(dc)) {
398 sp_pen_context_set_polyline_mode(SP_PEN_CONTEXT(dc));
399 }
400 }
401 }
403 /*
404 * Selection handlers
405 */
407 static void
408 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
409 {
410 if (dc->attach) {
411 spdc_attach_selection(dc, sel);
412 }
413 }
415 /* fixme: We have to ensure this is not delayed (Lauris) */
417 static void
418 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
419 {
420 if (dc->attach) {
421 spdc_attach_selection(dc, sel);
422 }
423 }
425 static void
426 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
427 {
428 /* We reset white and forget white/start/end anchors */
429 spdc_reset_white(dc);
430 dc->sa = NULL;
431 dc->ea = NULL;
433 SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
435 if ( item && SP_IS_PATH(item) ) {
436 /* Create new white data */
437 /* Item */
438 dc->white_item = item;
439 /* Curve list */
440 /* We keep it in desktop coordinates to eliminate calculation errors */
441 SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
442 norm->transform((dc->white_item)->i2d_affine());
443 g_return_if_fail( norm != NULL );
444 dc->white_curves = g_slist_reverse(norm->split());
445 norm->unref();
446 /* Anchor list */
447 for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
448 SPCurve *c;
449 c = (SPCurve*)l->data;
450 g_return_if_fail( c->get_segment_count() > 0 );
451 if ( !c->is_closed() ) {
452 SPDrawAnchor *a;
453 a = sp_draw_anchor_new(dc, c, TRUE, *(c->first_point()));
454 if (a)
455 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
456 a = sp_draw_anchor_new(dc, c, FALSE, *(c->last_point()));
457 if (a)
458 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
459 }
460 }
461 /* fixme: recalculate active anchor? */
462 }
463 }
466 /**
467 * Snaps node or handle to PI/rotationsnapsperpi degree increments.
468 *
469 * \param dc draw context
470 * \param p cursor point (to be changed by snapping)
471 * \param o origin point
472 * \param state keyboard state to check if ctrl or shift was pressed
473 */
475 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, Geom::Point &p, Geom::Point const &o,
476 guint state)
477 {
478 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
479 unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
480 SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
481 m.setup(SP_EVENT_CONTEXT_DESKTOP(ec));
483 bool snap_enabled = m.snapprefs.getSnapEnabledGlobally();
484 if (state & GDK_SHIFT_MASK) {
485 // SHIFT disables all snapping, except the angular snapping. After all, the user explicitly asked for angular
486 // snapping by pressing CTRL, otherwise we wouldn't have arrived here. But although we temporarily disable
487 // the snapping here, we must still call for a constrained snap in order to apply the constraints (i.e. round
488 // to the nearest angle increment)
489 m.snapprefs.setSnapEnabledGlobally(false);
490 }
492 Inkscape::SnappedPoint dummy = m.constrainedAngularSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE), boost::optional<Geom::Point>(), o, snaps);
493 p = dummy.getPoint();
495 if (state & GDK_SHIFT_MASK) {
496 m.snapprefs.setSnapEnabledGlobally(snap_enabled); // restore the original setting
497 }
499 m.unSetup();
500 }
503 void spdc_endpoint_snap_free(SPEventContext const * const ec, Geom::Point& p, guint const /*state*/)
504 {
505 SPDesktop *dt = SP_EVENT_CONTEXT_DESKTOP(ec);
506 SnapManager &m = dt->namedview->snap_manager;
507 Inkscape::Selection *selection = sp_desktop_selection (dt);
509 // selection->singleItem() is the item that is currently being drawn. This item will not be snapped to (to avoid self-snapping)
510 // TODO: Allow snapping to the stationary parts of the item, and only ignore the last segment
512 m.setup(dt, true, selection->singleItem());
513 m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
514 m.unSetup();
515 }
517 static SPCurve *
518 reverse_then_unref(SPCurve *orig)
519 {
520 SPCurve *ret = orig->create_reverse();
521 orig->unref();
522 return ret;
523 }
525 /**
526 * Concats red, blue and green.
527 * If any anchors are defined, process these, optionally removing curves from white list
528 * Invoke _flush_white to write result back to object.
529 */
530 void
531 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
532 {
533 /* Concat RBG */
534 SPCurve *c = dc->green_curve;
536 /* Green */
537 dc->green_curve = new SPCurve();
538 while (dc->green_bpaths) {
539 gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
540 dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
541 }
542 /* Blue */
543 c->append_continuous(dc->blue_curve, 0.0625);
544 dc->blue_curve->reset();
545 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
546 /* Red */
547 if (dc->red_curve_is_valid) {
548 c->append_continuous(dc->red_curve, 0.0625);
549 }
550 dc->red_curve->reset();
551 sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
553 if (c->is_empty()) {
554 c->unref();
555 return;
556 }
558 /* Step A - test, whether we ended on green anchor */
559 if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
560 // We hit green anchor, closing Green-Blue-Red
561 SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
562 c->closepath_current();
563 /* Closed path, just flush */
564 spdc_flush_white(dc, c);
565 c->unref();
566 return;
567 }
569 /* Step B - both start and end anchored to same curve */
570 if ( dc->sa && dc->ea
571 && ( dc->sa->curve == dc->ea->curve )
572 && ( ( dc->sa != dc->ea )
573 || dc->sa->curve->is_closed() ) )
574 {
575 // We hit bot start and end of single curve, closing paths
576 SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
577 if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
578 c = reverse_then_unref(c);
579 }
580 dc->sa->curve->append_continuous(c, 0.0625);
581 c->unref();
582 dc->sa->curve->closepath_current();
583 spdc_flush_white(dc, NULL);
584 return;
585 }
587 /* Step C - test start */
588 if (dc->sa) {
589 SPCurve *s = dc->sa->curve;
590 dc->white_curves = g_slist_remove(dc->white_curves, s);
591 if (dc->sa->start) {
592 s = reverse_then_unref(s);
593 }
594 s->append_continuous(c, 0.0625);
595 c->unref();
596 c = s;
597 } else /* Step D - test end */ if (dc->ea) {
598 SPCurve *e = dc->ea->curve;
599 dc->white_curves = g_slist_remove(dc->white_curves, e);
600 if (!dc->ea->start) {
601 e = reverse_then_unref(e);
602 }
603 c->append_continuous(e, 0.0625);
604 e->unref();
605 }
608 spdc_flush_white(dc, c);
610 c->unref();
611 }
613 /*
614 * Flushes white curve(s) and additional curve into object
615 *
616 * No cleaning of colored curves - this has to be done by caller
617 * No rereading of white data, so if you cannot rely on ::modified, do it in caller
618 *
619 */
621 static void
622 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
623 {
624 SPCurve *c;
626 if (dc->white_curves) {
627 g_assert(dc->white_item);
628 c = SPCurve::concat(dc->white_curves);
629 g_slist_free(dc->white_curves);
630 dc->white_curves = NULL;
631 if (gc) {
632 c->append(gc, FALSE);
633 }
634 } else if (gc) {
635 c = gc;
636 c->ref();
637 } else {
638 return;
639 }
641 /* Now we have to go back to item coordinates at last */
642 c->transform( dc->white_item
643 ? (dc->white_item)->dt2i_affine()
644 : SP_EVENT_CONTEXT_DESKTOP(dc)->dt2doc() );
646 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
647 SPDocument *doc = sp_desktop_document(desktop);
648 Inkscape::XML::Document *xml_doc = doc->getReprDoc();
650 if ( c && !c->is_empty() ) {
651 /* We actually have something to write */
653 bool has_lpe = false;
654 Inkscape::XML::Node *repr;
655 if (dc->white_item) {
656 repr = SP_OBJECT_REPR(dc->white_item);
657 has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
658 } else {
659 repr = xml_doc->createElement("svg:path");
660 /* Set style */
661 sp_desktop_apply_style_tool(desktop, repr, tool_name(dc).data(), false);
662 }
664 gchar *str = sp_svg_write_path( c->get_pathvector() );
665 g_assert( str != NULL );
666 if (has_lpe)
667 repr->setAttribute("inkscape:original-d", str);
668 else
669 repr->setAttribute("d", str);
670 g_free(str);
672 if (!dc->white_item) {
673 /* Attach repr */
674 SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
676 // we finished the path; now apply any waiting LPEs or freehand shapes
677 spdc_check_for_and_apply_waiting_LPE(dc, item);
679 dc->selection->set(repr);
680 Inkscape::GC::release(repr);
681 item->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();
682 item->updateRepr();
683 }
685 DocumentUndo::done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
686 _("Draw path"));
688 // When quickly drawing several subpaths with Shift, the next subpath may be finished and
689 // flushed before the selection_modified signal is fired by the previous change, which
690 // results in the tool losing all of the selected path's curve except that last subpath. To
691 // fix this, we force the selection_modified callback now, to make sure the tool's curve is
692 // in sync immediately.
693 spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
694 }
696 c->unref();
698 /* Flush pending updates */
699 doc->ensureUpToDate();
700 }
702 /**
703 * Returns FIRST active anchor (the activated one).
704 */
705 SPDrawAnchor *
706 spdc_test_inside(SPDrawContext *dc, Geom::Point p)
707 {
708 SPDrawAnchor *active = NULL;
710 /* Test green anchor */
711 if (dc->green_anchor) {
712 active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
713 }
715 for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
716 SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
717 if ( !active && na ) {
718 active = na;
719 }
720 }
722 return active;
723 }
725 static void
726 spdc_reset_white(SPDrawContext *dc)
727 {
728 if (dc->white_item) {
729 /* We do not hold refcount */
730 dc->white_item = NULL;
731 }
732 while (dc->white_curves) {
733 reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
734 dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
735 }
736 while (dc->white_anchors) {
737 sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
738 dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
739 }
740 }
742 static void
743 spdc_free_colors(SPDrawContext *dc)
744 {
745 /* Red */
746 if (dc->red_bpath) {
747 gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
748 dc->red_bpath = NULL;
749 }
750 if (dc->red_curve) {
751 dc->red_curve = dc->red_curve->unref();
752 }
753 /* Blue */
754 if (dc->blue_bpath) {
755 gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
756 dc->blue_bpath = NULL;
757 }
758 if (dc->blue_curve) {
759 dc->blue_curve = dc->blue_curve->unref();
760 }
761 /* Green */
762 while (dc->green_bpaths) {
763 gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
764 dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
765 }
766 if (dc->green_curve) {
767 dc->green_curve = dc->green_curve->unref();
768 }
769 if (dc->green_anchor) {
770 dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
771 }
772 /* White */
773 if (dc->white_item) {
774 /* We do not hold refcount */
775 dc->white_item = NULL;
776 }
777 while (dc->white_curves) {
778 reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
779 dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
780 }
781 while (dc->white_anchors) {
782 sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
783 dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
784 }
785 }
787 /* Create a single dot represented by a circle */
788 void spdc_create_single_dot(SPEventContext *ec, Geom::Point const &pt, char const *tool, guint event_state) {
789 g_return_if_fail(!strcmp(tool, "/tools/freehand/pen") || !strcmp(tool, "/tools/freehand/pencil"));
790 Glib::ustring tool_path = tool;
792 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(ec);
793 Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
794 Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
795 repr->setAttribute("sodipodi:type", "arc");
796 SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
797 Inkscape::GC::release(repr);
799 /* apply the tool's current style */
800 sp_desktop_apply_style_tool(desktop, repr, tool, false);
802 /* find out stroke width (TODO: is there an easier way??) */
803 double stroke_width = 3.0;
804 gchar const *style_str = NULL;
805 style_str = repr->attribute("style");
806 if (style_str) {
807 SPStyle *style = sp_style_new(SP_ACTIVE_DOCUMENT);
808 sp_style_merge_from_style_string(style, style_str);
809 stroke_width = style->stroke_width.computed;
810 style->stroke_width.computed = 0;
811 sp_style_unref(style);
812 }
813 /* unset stroke and set fill color to former stroke color */
814 gchar * str;
815 str = g_strdup_printf("fill:#%06x;stroke:none;", sp_desktop_get_color_tool(desktop, tool, false) >> 8);
816 repr->setAttribute("style", str);
817 g_free(str);
819 /* put the circle where the mouse click occurred and set the diameter to the
820 current stroke width, multiplied by the amount specified in the preferences */
821 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
823 Geom::Matrix const i2d (item->i2d_affine ());
824 Geom::Point pp = pt;
825 double rad = 0.5 * prefs->getDouble(tool_path + "/dot-size", 3.0);
826 if (event_state & GDK_MOD1_MASK) {
827 /* TODO: We vary the dot size between 0.5*rad and 1.5*rad, where rad is the dot size
828 as specified in prefs. Very simple, but it might be sufficient in practice. If not,
829 we need to devise something more sophisticated. */
830 double s = g_random_double_range(-0.5, 0.5);
831 rad *= (1 + s);
832 }
833 if (event_state & GDK_SHIFT_MASK) {
834 // double the point size
835 rad *= 2;
836 }
838 sp_repr_set_svg_double (repr, "sodipodi:cx", pp[Geom::X]);
839 sp_repr_set_svg_double (repr, "sodipodi:cy", pp[Geom::Y]);
840 sp_repr_set_svg_double (repr, "sodipodi:rx", rad * stroke_width);
841 sp_repr_set_svg_double (repr, "sodipodi:ry", rad * stroke_width);
842 item->updateRepr();
843 item->set_item_transform(i2d.inverse());
845 sp_desktop_selection(desktop)->set(item);
847 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating single dot"));
848 DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_NONE, _("Create single dot"));
849 }
851 /*
852 Local Variables:
853 mode:c++
854 c-file-style:"stroustrup"
855 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
856 indent-tabs-mode:nil
857 fill-column:99
858 End:
859 */
860 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :