src/draw-context.cpp

   1 #define __SP_DRAW_CONTEXT_C__
   2
   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  */
  15
  16 #define DRAW_VERBOSE
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include "config.h"
  20 #endif
  21 #include <gdk/gdkkeysyms.h>
  22
  23 #include "display/canvas-bpath.h"
  24 #include "xml/repr.h"
  25 #include "svg/svg.h"
  26 #include <glibmm/i18n.h>
  27 #include "libnr/n-art-bpath.h"
  28 #include "display/curve.h"
  29 #include "desktop.h"
  30 #include "desktop-affine.h"
  31 #include "desktop-handles.h"
  32 #include "desktop-style.h"
  33 #include "document.h"
  34 #include "draw-anchor.h"
  35 #include "macros.h"
  36 #include "message-stack.h"
  37 #include "pen-context.h"
  38 #include "prefs-utils.h"
  39 #include "selection.h"
  40 #include "selection-chemistry.h"
  41 #include "snap.h"
  42 #include "sp-path.h"
  43 #include "sp-namedview.h"
  44
  45 static void sp_draw_context_class_init(SPDrawContextClass *klass);
  46 static void sp_draw_context_init(SPDrawContext *dc);
  47 static void sp_draw_context_dispose(GObject *object);
  48
  49 static void sp_draw_context_setup(SPEventContext *ec);
  50 static void sp_draw_context_set(SPEventContext *ec, gchar const *key, gchar const *value);
  51 static void sp_draw_context_finish(SPEventContext *ec);
  52
  53 static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  54
  55 static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);
  56 static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);
  57
  58 static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);
  59
  60 static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);
  61
  62 static void spdc_reset_white(SPDrawContext *dc);
  63 static void spdc_free_colors(SPDrawContext *dc);
  64
  65
  66 static SPEventContextClass *draw_parent_class;
  67
  68
  69 GType
  70 sp_draw_context_get_type(void)
  71 {
  72     static GType type = 0;
  73     if (!type) {
  74         GTypeInfo info = {
  75             sizeof(SPDrawContextClass),
  76             NULL, NULL,
  77             (GClassInitFunc) sp_draw_context_class_init,
  78             NULL, NULL,
  79             sizeof(SPDrawContext),
  80             4,
  81             (GInstanceInitFunc) sp_draw_context_init,
  82             NULL,   /* value_table */
  83         };
  84         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);
  85     }
  86     return type;
  87 }
  88
  89 static void
  90 sp_draw_context_class_init(SPDrawContextClass *klass)
  91 {
  92     GObjectClass *object_class;
  93     SPEventContextClass *ec_class;
  94
  95     object_class = (GObjectClass *)klass;
  96     ec_class = (SPEventContextClass *) klass;
  97
  98     draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  99
 100     object_class->dispose = sp_draw_context_dispose;
 101
 102     ec_class->setup = sp_draw_context_setup;
 103     ec_class->set = sp_draw_context_set;
 104     ec_class->finish = sp_draw_context_finish;
 105     ec_class->root_handler = sp_draw_context_root_handler;
 106 }
 107
 108 static void
 109 sp_draw_context_init(SPDrawContext *dc)
 110 {
 111     dc->attach = FALSE;
 112
 113     dc->red_color = 0xff00007f;
 114     dc->blue_color = 0x0000ff7f;
 115     dc->green_color = 0x00ff007f;
 116     dc->red_curve_is_valid = false;
 117
 118     dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
 119
 120     new (&dc->sel_changed_connection) sigc::connection();
 121     new (&dc->sel_modified_connection) sigc::connection();
 122 }
 123
 124 static void
 125 sp_draw_context_dispose(GObject *object)
 126 {
 127     SPDrawContext *dc = SP_DRAW_CONTEXT(object);
 128
 129     dc->sel_changed_connection.~connection();
 130     dc->sel_modified_connection.~connection();
 131
 132     if (dc->grab) {
 133         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 134         dc->grab = NULL;
 135     }
 136
 137     if (dc->selection) {
 138         dc->selection = NULL;
 139     }
 140
 141     dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
 142
 143     spdc_free_colors(dc);
 144
 145     G_OBJECT_CLASS(draw_parent_class)->dispose(object);
 146 }
 147
 148 static void
 149 sp_draw_context_setup(SPEventContext *ec)
 150 {
 151     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 152     SPDesktop *dt = ec->desktop;
 153
 154     if (((SPEventContextClass *) draw_parent_class)->setup) {
 155         ((SPEventContextClass *) draw_parent_class)->setup(ec);
 156     }
 157
 158     dc->selection = sp_desktop_selection(dt);
 159
 160     /* Connect signals to track selection changes */
 161     dc->sel_changed_connection = dc->selection->connectChanged(
 162         sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
 163     );
 164     dc->sel_modified_connection = dc->selection->connectModified(
 165         sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
 166     );
 167
 168     /* Create red bpath */
 169     dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 170     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 171     /* Create red curve */
 172     dc->red_curve = new SPCurve(4);
 173
 174     /* Create blue bpath */
 175     dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 176     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 177     /* Create blue curve */
 178     dc->blue_curve = new SPCurve(8);
 179
 180     /* Create green curve */
 181     dc->green_curve = new SPCurve(64);
 182     /* No green anchor by default */
 183     dc->green_anchor = NULL;
 184     dc->green_closed = FALSE;
 185
 186     dc->attach = TRUE;
 187     spdc_attach_selection(dc, dc->selection);
 188 }
 189
 190 static void
 191 sp_draw_context_finish(SPEventContext *ec)
 192 {
 193     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 194
 195     dc->sel_changed_connection.disconnect();
 196     dc->sel_modified_connection.disconnect();
 197
 198     if (dc->grab) {
 199         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 200     }
 201
 202     if (dc->selection) {
 203         dc->selection = NULL;
 204     }
 205
 206     spdc_free_colors(dc);
 207 }
 208
 209 static void
 210 sp_draw_context_set(SPEventContext */*ec*/, const gchar */*key*/, const gchar */*value*/)
 211 {
 212 }
 213
 214 gint
 215 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
 216 {
 217     gint ret = FALSE;
 218
 219     switch (event->type) {
 220         case GDK_KEY_PRESS:
 221             switch (get_group0_keyval (&event->key)) {
 222                 case GDK_Up:
 223                 case GDK_Down:
 224                 case GDK_KP_Up:
 225                 case GDK_KP_Down:
 226                     // prevent the zoom field from activation
 227                     if (!MOD__CTRL_ONLY) {
 228                         ret = TRUE;
 229                     }
 230                     break;
 231                 default:
 232             break;
 233         }
 234         break;
 235     default:
 236         break;
 237     }
 238
 239     if (!ret) {
 240         if (((SPEventContextClass *) draw_parent_class)->root_handler) {
 241             ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
 242         }
 243     }
 244
 245     return ret;
 246 }
 247
 248 /*
 249  * If we have an item and a waiting LPE, apply the effect to the item
 250  * (spiro spline mode is treated separately)
 251  */
 252 void
 253 spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item)
 254 {
 255     using namespace Inkscape::LivePathEffect;
 256
 257     if (item) {
 258         if (prefs_get_int_attribute("tools.freehand", "spiro-spline-mode", 0)) {
 259             Effect::createAndApply(SPIRO, dc->desktop->doc(), item);
 260             return;
 261         }
 262         if (dc->waiting_LPE_type != INVALID_LPE) {
 263             Effect::createAndApply(dc->waiting_LPE_type, dc->desktop->doc(), item);
 264             dc->waiting_LPE_type = INVALID_LPE;
 265         }
 266         if (SP_IS_PEN_CONTEXT(dc)) {
 267             SP_PEN_CONTEXT(dc)->polylines_only = false;
 268         }
 269     }
 270 }
 271
 272 /*
 273  * Selection handlers
 274  */
 275
 276 static void
 277 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
 278 {
 279     // note: in draw context, selection_changed() is only called when a new item was created;
 280     // otherwise the following function call would yield wrong results
 281     spdc_check_for_and_apply_waiting_LPE(dc, sel->singleItem());
 282
 283     if (dc->attach) {
 284         spdc_attach_selection(dc, sel);
 285     }
 286 }
 287
 288 /* fixme: We have to ensure this is not delayed (Lauris) */
 289
 290 static void
 291 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
 292 {
 293     if (dc->attach) {
 294         spdc_attach_selection(dc, sel);
 295     }
 296 }
 297
 298 static void
 299 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
 300 {
 301     /* We reset white and forget white/start/end anchors */
 302     spdc_reset_white(dc);
 303     dc->sa = NULL;
 304     dc->ea = NULL;
 305
 306     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 307
 308     if ( item && SP_IS_PATH(item) ) {
 309         /* Create new white data */
 310         /* Item */
 311         dc->white_item = item;
 312         /* Curve list */
 313         /* We keep it in desktop coordinates to eliminate calculation errors */
 314         SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
 315         norm->transform(sp_item_i2d_affine(dc->white_item));
 316         g_return_if_fail( norm != NULL );
 317         dc->white_curves = g_slist_reverse(norm->split());
 318         norm->unref();
 319         /* Anchor list */
 320         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 321             SPCurve *c;
 322             c = (SPCurve*)l->data;
 323             g_return_if_fail( c->get_length() > 1 );
 324             if ( !c->is_closed() ) {
 325                 SPDrawAnchor *a;
 326                 a = sp_draw_anchor_new(dc, c, TRUE, c->first_point());
 327                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 328                 a = sp_draw_anchor_new(dc, c, FALSE, c->last_point());
 329                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 330             }
 331         }
 332         /* fixme: recalculate active anchor? */
 333     }
 334 }
 335
 336
 337 /**
 338  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 339  *
 340  *  \param dc draw context
 341  *  \param p cursor point (to be changed by snapping)
 342  *  \param o origin point
 343  *  \param state  keyboard state to check if ctrl was pressed
 344 */
 345
 346 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 347                                  guint state)
 348 {
 349     /* Control must be down for this snap to work */
 350     if ((state & GDK_CONTROL_MASK) == 0) {
 351         return;
 352     }
 353
 354     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 355     /* 0 means no snapping. */
 356
 357     /* mirrored by fabs, so this corresponds to 15 degrees */
 358     NR::Point best; /* best solution */
 359     double bn = NR_HUGE; /* best normal */
 360     double bdot = 0;
 361     NR::Point v = NR::Point(0, 1);
 362     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 363     double const r10 = -r01, r11 = r00;
 364
 365     NR::Point delta = p - o;
 366
 367     for (unsigned i = 0; i < snaps; i++) {
 368         double const ndot = fabs(dot(v,NR::rot90(delta)));
 369         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 370                     r10*v[NR::X] + r11*v[NR::Y]);
 371         if (ndot < bn) {
 372             /* I think it is better numerically to use the normal, rather than the dot product
 373              * to assess solutions, but I haven't proven it. */
 374             bn = ndot;
 375             best = v;
 376             bdot = dot(v, delta);
 377         }
 378         v = t;
 379     }
 380
 381     if (fabs(bdot) > 0) {
 382         p = o + bdot * best;
 383
 384         /* Snap it along best vector */
 385         SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 386         m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 387         m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
 388     }
 389 }
 390
 391
 392 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 393 {
 394     /* Shift disables this snap */
 395     if (state & GDK_SHIFT_MASK) {
 396         return;
 397     }
 398
 399     SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 400     m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 401     m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 402 }
 403
 404 static SPCurve *
 405 reverse_then_unref(SPCurve *orig)
 406 {
 407     SPCurve *ret = orig->create_reverse();
 408     orig->unref();
 409     return ret;
 410 }
 411
 412 /**
 413  * Concats red, blue and green.
 414  * If any anchors are defined, process these, optionally removing curves from white list
 415  * Invoke _flush_white to write result back to object.
 416  */
 417 void
 418 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 419 {
 420     /* Concat RBG */
 421     SPCurve *c = dc->green_curve;
 422
 423     /* Green */
 424     dc->green_curve = new SPCurve(64);
 425     while (dc->green_bpaths) {
 426         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 427         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 428     }
 429     /* Blue */
 430     c->append_continuous(dc->blue_curve, 0.0625);
 431     dc->blue_curve->reset();
 432     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 433     /* Red */
 434     if (dc->red_curve_is_valid) {
 435         c->append_continuous(dc->red_curve, 0.0625);
 436     }
 437     dc->red_curve->reset();
 438     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 439
 440     if (c->is_empty()) {
 441         c->unref();
 442         return;
 443     }
 444
 445     /* Step A - test, whether we ended on green anchor */
 446     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 447         // We hit green anchor, closing Green-Blue-Red
 448         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 449         c->closepath_current();
 450         /* Closed path, just flush */
 451         spdc_flush_white(dc, c);
 452         c->unref();
 453         return;
 454     }
 455
 456     /* Step B - both start and end anchored to same curve */
 457     if ( dc->sa && dc->ea
 458          && ( dc->sa->curve == dc->ea->curve )
 459          && ( ( dc->sa != dc->ea )
 460               || dc->sa->curve->is_closed() ) )
 461     {
 462         // We hit bot start and end of single curve, closing paths
 463         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 464         if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
 465             c = reverse_then_unref(c);
 466         }
 467         dc->sa->curve->append_continuous(c, 0.0625);
 468         c->unref();
 469         dc->sa->curve->closepath_current();
 470         spdc_flush_white(dc, NULL);
 471         return;
 472     }
 473
 474     /* Step C - test start */
 475     if (dc->sa) {
 476         SPCurve *s = dc->sa->curve;
 477         dc->white_curves = g_slist_remove(dc->white_curves, s);
 478         if (dc->sa->start) {
 479             s = reverse_then_unref(s);
 480         }
 481         s->append_continuous(c, 0.0625);
 482         c->unref();
 483         c = s;
 484     } else /* Step D - test end */ if (dc->ea) {
 485         SPCurve *e = dc->ea->curve;
 486         dc->white_curves = g_slist_remove(dc->white_curves, e);
 487         if (!dc->ea->start) {
 488             e = reverse_then_unref(e);
 489         }
 490         c->append_continuous(e, 0.0625);
 491         e->unref();
 492     }
 493
 494
 495     spdc_flush_white(dc, c);
 496
 497     c->unref();
 498 }
 499
 500 static char const *
 501 tool_name(SPDrawContext *dc)
 502 {
 503     return ( SP_IS_PEN_CONTEXT(dc)
 504              ? "tools.freehand.pen"
 505              : "tools.freehand.pencil" );
 506 }
 507
 508 /*
 509  * Flushes white curve(s) and additional curve into object
 510  *
 511  * No cleaning of colored curves - this has to be done by caller
 512  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 513  *
 514  */
 515
 516 static void
 517 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 518 {
 519     SPCurve *c;
 520
 521     if (dc->white_curves) {
 522         g_assert(dc->white_item);
 523         c = SPCurve::concat(dc->white_curves);
 524         g_slist_free(dc->white_curves);
 525         dc->white_curves = NULL;
 526         if (gc) {
 527             c->append(gc, FALSE);
 528         }
 529     } else if (gc) {
 530         c = gc;
 531         c->ref();
 532     } else {
 533         return;
 534     }
 535
 536     /* Now we have to go back to item coordinates at last */
 537     c->transform(( dc->white_item
 538                             ? sp_item_dt2i_affine(dc->white_item)
 539                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 540
 541     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 542     SPDocument *doc = sp_desktop_document(desktop);
 543     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 544
 545     if ( c && !c->is_empty() ) {
 546         /* We actually have something to write */
 547
 548         bool has_lpe = false;
 549         Inkscape::XML::Node *repr;
 550         if (dc->white_item) {
 551             repr = SP_OBJECT_REPR(dc->white_item);
 552             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 553         } else {
 554             repr = xml_doc->createElement("svg:path");
 555             /* Set style */
 556             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 557         }
 558
 559         gchar *str = sp_svg_write_path( c->get_pathvector() );
 560         g_assert( str != NULL );
 561         if (has_lpe)
 562             repr->setAttribute("inkscape:original-d", str);
 563         else
 564             repr->setAttribute("d", str);
 565         g_free(str);
 566
 567         if (!dc->white_item) {
 568             /* Attach repr */
 569             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 570             dc->selection->set(repr);
 571             Inkscape::GC::release(repr);
 572             item->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 573             item->updateRepr();
 574         }
 575
 576         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 577                          _("Draw path"));
 578
 579         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 580         // flushed before the selection_modified signal is fired by the previous change, which
 581         // results in the tool losing all of the selected path's curve except that last subpath. To
 582         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 583         // in sync immediately.
 584         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 585     }
 586
 587     c->unref();
 588
 589     /* Flush pending updates */
 590     sp_document_ensure_up_to_date(doc);
 591 }
 592
 593 /**
 594  * Returns FIRST active anchor (the activated one).
 595  */
 596 SPDrawAnchor *
 597 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 598 {
 599     SPDrawAnchor *active = NULL;
 600
 601     /* Test green anchor */
 602     if (dc->green_anchor) {
 603         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 604     }
 605
 606     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 607         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 608         if ( !active && na ) {
 609             active = na;
 610         }
 611     }
 612
 613     return active;
 614 }
 615
 616 static void
 617 spdc_reset_white(SPDrawContext *dc)
 618 {
 619     if (dc->white_item) {
 620         /* We do not hold refcount */
 621         dc->white_item = NULL;
 622     }
 623     while (dc->white_curves) {
 624         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 625         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 626     }
 627     while (dc->white_anchors) {
 628         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 629         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 630     }
 631 }
 632
 633 static void
 634 spdc_free_colors(SPDrawContext *dc)
 635 {
 636     /* Red */
 637     if (dc->red_bpath) {
 638         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 639         dc->red_bpath = NULL;
 640     }
 641     if (dc->red_curve) {
 642         dc->red_curve = dc->red_curve->unref();
 643     }
 644     /* Blue */
 645     if (dc->blue_bpath) {
 646         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 647         dc->blue_bpath = NULL;
 648     }
 649     if (dc->blue_curve) {
 650         dc->blue_curve = dc->blue_curve->unref();
 651     }
 652     /* Green */
 653     while (dc->green_bpaths) {
 654         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 655         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 656     }
 657     if (dc->green_curve) {
 658         dc->green_curve = dc->green_curve->unref();
 659     }
 660     if (dc->green_anchor) {
 661         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 662     }
 663     /* White */
 664     if (dc->white_item) {
 665         /* We do not hold refcount */
 666         dc->white_item = NULL;
 667     }
 668     while (dc->white_curves) {
 669         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 670         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 671     }
 672     while (dc->white_anchors) {
 673         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 674         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 675     }
 676 }
 677
 678
 679 /*
 680   Local Variables:
 681   mode:c++
 682   c-file-style:"stroustrup"
 683   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 684   indent-tabs-mode:nil
 685   fill-column:99
 686   End:
 687 */
 688 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :