src/flood-context.cpp

   1 #define __SP_FLOOD_CONTEXT_C__
   2
   3 /** \file
   4 * Bucket fill drawing context, works by bitmap filling an area on a rendered version of the current display and then tracing the result using potrace.
   5 *
   6 * Author:
   7 *   Lauris Kaplinski <lauris@kaplinski.com>
   8 *   bulia byak <buliabyak@users.sf.net>
   9 *   John Bintz <jcoswell@coswellproductions.org>
  10 *
  11 * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  12 * Copyright (C) 2000-2005 authors
  13 * Copyright (C) 2000-2001 Ximian, Inc.
  14 *
  15 * Released under GNU GPL, read the file 'COPYING' for more information
  16 */
  17
  18 #include "config.h"
  19
  20 #include <gdk/gdkkeysyms.h>
  21 #include <queue>
  22 #include <deque>
  23
  24 #include "macros.h"
  25 #include "display/sp-canvas.h"
  26 #include "document.h"
  27 #include "sp-namedview.h"
  28 #include "sp-object.h"
  29 #include "sp-rect.h"
  30 #include "selection.h"
  31 #include "desktop-handles.h"
  32 #include "desktop.h"
  33 #include "desktop-style.h"
  34 #include "message-stack.h"
  35 #include "message-context.h"
  36 #include "pixmaps/cursor-paintbucket.xpm"
  37 #include "flood-context.h"
  38 #include "sp-metrics.h"
  39 #include <glibmm/i18n.h>
  40 #include "object-edit.h"
  41 #include "xml/repr.h"
  42 #include "xml/node-event-vector.h"
  43 #include "prefs-utils.h"
  44 #include "context-fns.h"
  45 #include "rubberband.h"
  46
  47 #include "display/nr-arena-item.h"
  48 #include "display/nr-arena.h"
  49 #include "display/nr-arena-image.h"
  50 #include "display/canvas-arena.h"
  51 #include "libnr/nr-pixops.h"
  52 #include "libnr/nr-matrix-translate-ops.h"
  53 #include "libnr/nr-scale-ops.h"
  54 #include "libnr/nr-scale-translate-ops.h"
  55 #include "libnr/nr-translate-matrix-ops.h"
  56 #include "libnr/nr-translate-scale-ops.h"
  57 #include "libnr/nr-matrix-ops.h"
  58 #include "sp-item.h"
  59 #include "sp-root.h"
  60 #include "sp-defs.h"
  61 #include "sp-path.h"
  62 #include "splivarot.h"
  63 #include "livarot/Path.h"
  64 #include "livarot/Shape.h"
  65 #include "libnr/n-art-bpath.h"
  66 #include "svg/svg.h"
  67 #include "color.h"
  68
  69 #include "trace/trace.h"
  70 #include "trace/imagemap.h"
  71 #include "trace/potrace/inkscape-potrace.h"
  72
  73 static void sp_flood_context_class_init(SPFloodContextClass *klass);
  74 static void sp_flood_context_init(SPFloodContext *flood_context);
  75 static void sp_flood_context_dispose(GObject *object);
  76
  77 static void sp_flood_context_setup(SPEventContext *ec);
  78
  79 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  80 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  81
  82 static void sp_flood_finish(SPFloodContext *rc);
  83
  84 static SPEventContextClass *parent_class;
  85
  86
  87 GtkType sp_flood_context_get_type()
  88 {
  89     static GType type = 0;
  90     if (!type) {
  91         GTypeInfo info = {
  92             sizeof(SPFloodContextClass),
  93             NULL, NULL,
  94             (GClassInitFunc) sp_flood_context_class_init,
  95             NULL, NULL,
  96             sizeof(SPFloodContext),
  97             4,
  98             (GInstanceInitFunc) sp_flood_context_init,
  99             NULL,    /* value_table */
 100         };
 101         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPFloodContext", &info, (GTypeFlags) 0);
 102     }
 103     return type;
 104 }
 105
 106 static void sp_flood_context_class_init(SPFloodContextClass *klass)
 107 {
 108     GObjectClass *object_class = (GObjectClass *) klass;
 109     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 110
 111     parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);
 112
 113     object_class->dispose = sp_flood_context_dispose;
 114
 115     event_context_class->setup = sp_flood_context_setup;
 116     event_context_class->root_handler  = sp_flood_context_root_handler;
 117     event_context_class->item_handler  = sp_flood_context_item_handler;
 118 }
 119
 120 static void sp_flood_context_init(SPFloodContext *flood_context)
 121 {
 122     SPEventContext *event_context = SP_EVENT_CONTEXT(flood_context);
 123
 124     event_context->cursor_shape = cursor_paintbucket_xpm;
 125     event_context->hot_x = 11;
 126     event_context->hot_y = 30;
 127     event_context->xp = 0;
 128     event_context->yp = 0;
 129     event_context->tolerance = 4;
 130     event_context->within_tolerance = false;
 131     event_context->item_to_select = NULL;
 132
 133     event_context->shape_repr = NULL;
 134     event_context->shape_knot_holder = NULL;
 135
 136     flood_context->item = NULL;
 137
 138     new (&flood_context->sel_changed_connection) sigc::connection();
 139 }
 140
 141 static void sp_flood_context_dispose(GObject *object)
 142 {
 143     SPFloodContext *rc = SP_FLOOD_CONTEXT(object);
 144     SPEventContext *ec = SP_EVENT_CONTEXT(object);
 145
 146     rc->sel_changed_connection.disconnect();
 147     rc->sel_changed_connection.~connection();
 148
 149     /* fixme: This is necessary because we do not grab */
 150     if (rc->item) {
 151         sp_flood_finish(rc);
 152     }
 153
 154     if (ec->shape_repr) { // remove old listener
 155         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 156         Inkscape::GC::release(ec->shape_repr);
 157         ec->shape_repr = 0;
 158     }
 159
 160     if (rc->_message_context) {
 161         delete rc->_message_context;
 162     }
 163
 164     G_OBJECT_CLASS(parent_class)->dispose(object);
 165 }
 166
 167 static Inkscape::XML::NodeEventVector ec_shape_repr_events = {
 168     NULL, /* child_added */
 169     NULL, /* child_removed */
 170     ec_shape_event_attr_changed,
 171     NULL, /* content_changed */
 172     NULL  /* order_changed */
 173 };
 174
 175 /**
 176 \brief  Callback that processes the "changed" signal on the selection;
 177 destroys old and creates new knotholder
 178 */
 179 void sp_flood_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 180 {
 181     SPFloodContext *rc = SP_FLOOD_CONTEXT(data);
 182     SPEventContext *ec = SP_EVENT_CONTEXT(rc);
 183
 184     if (ec->shape_repr) { // remove old listener
 185         sp_repr_remove_listener_by_data(ec->shape_repr, ec);
 186         Inkscape::GC::release(ec->shape_repr);
 187         ec->shape_repr = 0;
 188     }
 189
 190     SPItem *item = selection->singleItem();
 191     if (item) {
 192         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 193         if (shape_repr) {
 194             ec->shape_repr = shape_repr;
 195             Inkscape::GC::anchor(shape_repr);
 196             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 197         }
 198     }
 199 }
 200
 201 static void sp_flood_context_setup(SPEventContext *ec)
 202 {
 203     SPFloodContext *rc = SP_FLOOD_CONTEXT(ec);
 204
 205     if (((SPEventContextClass *) parent_class)->setup) {
 206         ((SPEventContextClass *) parent_class)->setup(ec);
 207     }
 208
 209     SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();
 210     if (item) {
 211         Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);
 212         if (shape_repr) {
 213             ec->shape_repr = shape_repr;
 214             Inkscape::GC::anchor(shape_repr);
 215             sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);
 216         }
 217     }
 218
 219     rc->sel_changed_connection.disconnect();
 220     rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(
 221         sigc::bind(sigc::ptr_fun(&sp_flood_context_selection_changed), (gpointer)rc)
 222     );
 223
 224     rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 225
 226     if (prefs_get_int_attribute("tools.paintbucket", "selcue", 0) != 0) {
 227         rc->enableSelectionCue();
 228     }
 229 }
 230
 231 /**
 232  * \brief Merge a pixel with the background color.
 233  * \param orig The pixel to merge with the background.
 234  * \param bg The background color.
 235  * \param base The pixel to merge the original and background into.
 236  */
 237 inline static void
 238 merge_pixel_with_background (unsigned char *orig, unsigned char *bg,
 239            unsigned char *base)
 240 {
 241     int precalc_bg_alpha = (255 * (255 - bg[3])) / 255;
 242
 243     for (int i = 0; i < 3; i++) {
 244         base[i] = precalc_bg_alpha + (bg[i] * bg[3]) / 255;
 245         base[i] = (base[i] * (255 - orig[3])) / 255 + (orig[i] * orig[3]) / 255;
 246     }
 247 }
 248
 249 /**
 250  * \brief Get the pointer to a pixel in a pixel buffer.
 251  * \param px The pixel buffer.
 252  * \param x The X coordinate.
 253  * \param y The Y coordinate.
 254  * \param width The width of the pixel buffer.
 255  */
 256 inline unsigned char * get_pixel(guchar *px, int x, int y, int width) {
 257     return px + (x + y * width) * 4;
 258 }
 259
 260 /**
 261  * \brief Generate the list of trace channel selection entries.
 262  */
 263 GList * flood_channels_dropdown_items_list() {
 264     GList *glist = NULL;
 265
 266     glist = g_list_append (glist, _("Visible Colors"));
 267     glist = g_list_append (glist, _("Red"));
 268     glist = g_list_append (glist, _("Green"));
 269     glist = g_list_append (glist, _("Blue"));
 270     glist = g_list_append (glist, _("Hue"));
 271     glist = g_list_append (glist, _("Saturation"));
 272     glist = g_list_append (glist, _("Lightness"));
 273     glist = g_list_append (glist, _("Alpha"));
 274
 275     return glist;
 276 }
 277
 278 /**
 279  * \brief Generate the list of autogap selection entries.
 280  */
 281 GList * flood_autogap_dropdown_items_list() {
 282     GList *glist = NULL;
 283
 284     glist = g_list_append (glist, _("None"));
 285     glist = g_list_append (glist, _("Small"));
 286     glist = g_list_append (glist, _("Medium"));
 287     glist = g_list_append (glist, _("Large"));
 288
 289     return glist;
 290 }
 291
 292 /**
 293  * \brief Compare a pixel in a pixel buffer with another pixel to determine if a point should be included in the fill operation.
 294  * \param check The pixel in the pixel buffer to check.
 295  * \param orig The original selected pixel to use as the fill target color.
 296  * \param merged_orig_pixel The original pixel merged with the background.
 297  * \param dtc The desktop background color.
 298  * \param threshold The fill threshold.
 299  * \param method The fill method to use as defined in PaintBucketChannels.
 300  */
 301 static bool compare_pixels(unsigned char *check, unsigned char *orig, unsigned char *merged_orig_pixel, unsigned char *dtc, int threshold, PaintBucketChannels method) {
 302     int diff = 0;
 303     float hsl_check[3], hsl_orig[3];
 304
 305     if ((method == FLOOD_CHANNELS_H) ||
 306         (method == FLOOD_CHANNELS_S) ||
 307         (method == FLOOD_CHANNELS_L)) {
 308         sp_color_rgb_to_hsl_floatv(hsl_check, check[0] / 255.0, check[1] / 255.0, check[2] / 255.0);
 309         sp_color_rgb_to_hsl_floatv(hsl_orig, orig[0] / 255.0, orig[1] / 255.0, orig[2] / 255.0);
 310     }
 311
 312     switch (method) {
 313         case FLOOD_CHANNELS_ALPHA:
 314             return ((int)abs(check[3] - orig[3]) <= threshold);
 315         case FLOOD_CHANNELS_R:
 316             return ((int)abs(check[0] - orig[0]) <= threshold);
 317         case FLOOD_CHANNELS_G:
 318             return ((int)abs(check[1] - orig[1]) <= threshold);
 319         case FLOOD_CHANNELS_B:
 320             return ((int)abs(check[2] - orig[2]) <= threshold);
 321         case FLOOD_CHANNELS_RGB:
 322             unsigned char merged_check[3];
 323
 324             merge_pixel_with_background(check, dtc, merged_check);
 325
 326             for (int i = 0; i < 3; i++) {
 327               diff += (int)abs(merged_check[i] - merged_orig_pixel[i]);
 328             }
 329             return ((diff / 3) <= ((threshold * 3) / 4));
 330
 331         case FLOOD_CHANNELS_H:
 332             return ((int)(fabs(hsl_check[0] - hsl_orig[0]) * 100.0) <= threshold);
 333         case FLOOD_CHANNELS_S:
 334             return ((int)(fabs(hsl_check[1] - hsl_orig[1]) * 100.0) <= threshold);
 335         case FLOOD_CHANNELS_L:
 336             return ((int)(fabs(hsl_check[2] - hsl_orig[2]) * 100.0) <= threshold);
 337     }
 338
 339     return false;
 340 }
 341
 342 static inline bool is_pixel_checked(unsigned char *t) { return t[0] == 1; }
 343 static inline bool is_pixel_queued(unsigned char *t) { return t[1] == 1; }
 344 static inline bool is_pixel_paintability_checked(unsigned char *t) { return t[2] != 0; }
 345 static inline bool is_pixel_paintable(unsigned char *t) { return t[2] == 1; }
 346 static inline bool is_pixel_colored(unsigned char *t) { return t[3] == 255; }
 347
 348 static inline void mark_pixel_checked(unsigned char *t) { t[0] = 1; }
 349 static inline void mark_pixel_unchecked(unsigned char *t) { t[0] = 0; }
 350 static inline void mark_pixel_queued(unsigned char *t) { t[1] = 1; }
 351 static inline void mark_pixel_paintable(unsigned char *t) { t[2] = 1; }
 352 static inline void mark_pixel_not_paintable(unsigned char *t) { t[2] = 2; }
 353 static inline void mark_pixel_colored(unsigned char *t) { t[3] = 255; }
 354
 355 static inline void clear_pixel_paintability(unsigned char *t) { t[2] = 0; }
 356
 357 struct bitmap_coords_info {
 358     bool is_left;
 359     unsigned int x;
 360     unsigned int y;
 361     int y_limit;
 362     unsigned int width;
 363     unsigned int height;
 364     unsigned int threshold;
 365     unsigned int radius;
 366     PaintBucketChannels method;
 367     unsigned char *dtc;
 368     unsigned char *merged_orig_pixel;
 369     NR::Rect bbox;
 370     NR::Rect screen;
 371     unsigned int max_queue_size;
 372     unsigned int current_step;
 373 };
 374
 375 /**
 376  * \brief Check if a pixel can be included in the fill.
 377  * \param px The rendered pixel buffer to check.
 378  * \param trace_t The pixel in the trace pixel buffer to check or mark.
 379  * \param x The X coordinate.
 380  * \param y The y coordinate.
 381  * \param orig_color The original selected pixel to use as the fill target color.
 382  * \param bci The bitmap_coords_info structure.
 383  */
 384 inline static bool check_if_pixel_is_paintable(guchar *px, unsigned char *trace_t, int x, int y, unsigned char *orig_color, bitmap_coords_info bci) {
 385     if (is_pixel_paintability_checked(trace_t)) {
 386         return is_pixel_paintable(trace_t);
 387     } else {
 388         unsigned char *t = get_pixel(px, x, y, bci.width);
 389         if (compare_pixels(t, orig_color, bci.merged_orig_pixel, bci.dtc, bci.threshold, bci.method)) {
 390             mark_pixel_paintable(trace_t);
 391             return true;
 392         } else {
 393             mark_pixel_not_paintable(trace_t);
 394             return false;
 395         }
 396     }
 397 }
 398
 399 /**
 400  * \brief Perform the bitmap-to-vector tracing and place the traced path onto the document.
 401  * \param px The trace pixel buffer to trace to SVG.
 402  * \param desktop The desktop on which to place the final SVG path.
 403  * \param transform The transform to apply to the final SVG path.
 404  * \param union_with_selection If true, merge the final SVG path with the current selection.
 405  */
 406 static void do_trace(bitmap_coords_info bci, guchar *trace_px, SPDesktop *desktop, NR::Matrix transform, bool union_with_selection) {
 407     SPDocument *document = sp_desktop_document(desktop);
 408
 409     unsigned char *trace_t;
 410
 411     GrayMap *gray_map = GrayMapCreate(bci.width, bci.height);
 412     for (unsigned int y = 0; y < bci.height ; y++) {
 413         unsigned long *gray_map_t = gray_map->rows[y];
 414
 415         trace_t = get_pixel(trace_px, 0, y, bci.width);
 416         for (unsigned int x = 0; x < bci.width ; x++) {
 417             *gray_map_t = is_pixel_colored(trace_t) ? GRAYMAP_BLACK : GRAYMAP_WHITE;
 418             gray_map_t++;
 419             trace_t += 4;
 420         }
 421     }
 422
 423     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 424     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.traceGrayMap(gray_map);
 425     gray_map->destroy(gray_map);
 426
 427     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 428     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 429
 430     long totalNodeCount = 0L;
 431
 432     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 433
 434     for (unsigned int i=0 ; i<results.size() ; i++) {
 435         Inkscape::Trace::TracingEngineResult result = results[i];
 436         totalNodeCount += result.getNodeCount();
 437
 438         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 439         /* Set style */
 440         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 441
 442         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 443         Path *path = bpath_to_Path(bpath);
 444         g_free(bpath);
 445
 446         if (offset != 0) {
 447
 448             Shape *path_shape = new Shape();
 449
 450             path->ConvertWithBackData(0.03);
 451             path->Fill(path_shape, 0);
 452             delete path;
 453
 454             Shape *expanded_path_shape = new Shape();
 455
 456             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 457             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 458             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 459
 460             Path *expanded_path = new Path();
 461
 462             expanded_path->Reset();
 463             expanded_path_shape->ConvertToForme(expanded_path);
 464             expanded_path->ConvertEvenLines(1.0);
 465             expanded_path->Simplify(1.0);
 466
 467             delete path_shape;
 468             delete expanded_path_shape;
 469
 470             gchar *str = expanded_path->svg_dump_path();
 471             if (str && *str) {
 472                 pathRepr->setAttribute("d", str);
 473                 g_free(str);
 474             } else {
 475                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 476                 Inkscape::GC::release(pathRepr);
 477                 g_free(str);
 478                 return;
 479             }
 480
 481             delete expanded_path;
 482
 483         } else {
 484             gchar *str = path->svg_dump_path();
 485             delete path;
 486             pathRepr->setAttribute("d", str);
 487             g_free(str);
 488         }
 489
 490         layer_repr->addChild(pathRepr, NULL);
 491
 492         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 493         if (reprobj) {
 494             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 495
 496             // premultiply the item transform by the accumulated parent transform in the paste layer
 497             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 498             if (!local.test_identity()) {
 499                 gchar const *t_str = pathRepr->attribute("transform");
 500                 NR::Matrix item_t (NR::identity());
 501                 if (t_str)
 502                     sp_svg_transform_read(t_str, &item_t);
 503                 item_t *= local.inverse();
 504                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 505                 gchar *affinestr=sp_svg_transform_write(item_t);
 506                 pathRepr->setAttribute("transform", affinestr);
 507                 g_free(affinestr);
 508             }
 509
 510             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 511
 512             pathRepr->setPosition(-1);
 513
 514             if (union_with_selection) {
 515                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, ngettext("Area filled, path with <b>%d</b> node created and unioned with selection.","Area filled, path with <b>%d</b> nodes created and unioned with selection.",sp_nodes_in_path(SP_PATH(reprobj))), sp_nodes_in_path(SP_PATH(reprobj)));
 516                 selection->add(reprobj);
 517                 sp_selected_path_union_skip_undo();
 518             } else {
 519                 desktop->messageStack()->flashF(Inkscape::WARNING_MESSAGE, ngettext("Area filled, path with <b>%d</b> node created.","Area filled, path with <b>%d</b> nodes created.",sp_nodes_in_path(SP_PATH(reprobj))), sp_nodes_in_path(SP_PATH(reprobj)));
 520                 selection->set(reprobj);
 521             }
 522
 523         }
 524
 525         Inkscape::GC::release(pathRepr);
 526
 527     }
 528 }
 529
 530 /**
 531  * \brief The possible return states of perform_bitmap_scanline_check()
 532  */
 533 enum ScanlineCheckResult {
 534     SCANLINE_CHECK_OK,
 535     SCANLINE_CHECK_ABORTED,
 536     SCANLINE_CHECK_BOUNDARY
 537 };
 538
 539 /**
 540  * \brief Determine if the provided coordinates are within the pixel buffer limits.
 541  * \param x The X coordinate.
 542  * \param y The Y coordinate.
 543  * \param bci The bitmap_coords_info structure.
 544  */
 545 inline static bool coords_in_range(unsigned int x, unsigned int y, bitmap_coords_info bci) {
 546     return (x < bci.width) &&
 547            (y < bci.height);
 548 }
 549
 550 #define PAINT_DIRECTION_LEFT 1
 551 #define PAINT_DIRECTION_RIGHT 2
 552 #define PAINT_DIRECTION_UP 4
 553 #define PAINT_DIRECTION_DOWN 8
 554 #define PAINT_DIRECTION_ALL 15
 555
 556 /**
 557  * \brief Paint a pixel or a square (if autogap is enabled) on the trace pixel buffer
 558  * \param px The rendered pixel buffer to check.
 559  * \param trace_px The trace pixel buffer.
 560  * \param orig_color The original selected pixel to use as the fill target color.
 561  * \param bci The bitmap_coords_info structure.
 562  * \param original_point_trace_t The original pixel in the trace pixel buffer to check.
 563  */
 564 inline static unsigned int paint_pixel(guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci, unsigned char *original_point_trace_t) {
 565     if (bci.radius == 0) {
 566         mark_pixel_colored(original_point_trace_t);
 567         return PAINT_DIRECTION_ALL;
 568     } else {
 569         unsigned char *trace_t;
 570
 571         bool can_paint_up = true;
 572         bool can_paint_down = true;
 573         bool can_paint_left = true;
 574         bool can_paint_right = true;
 575
 576         for (unsigned int ty = bci.y - bci.radius; ty <= bci.y + bci.radius; ty++) {
 577             for (unsigned int tx = bci.x - bci.radius; tx <= bci.x + bci.radius; tx++) {
 578                 if (coords_in_range(tx, ty, bci)) {
 579                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 580                     if (!is_pixel_colored(trace_t)) {
 581                         if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 582                             mark_pixel_colored(trace_t);
 583                         } else {
 584                             if (tx < bci.x) { can_paint_left = false; }
 585                             if (tx > bci.x) { can_paint_right = false; }
 586                             if (ty < bci.y) { can_paint_up = false; }
 587                             if (ty > bci.y) { can_paint_down = false; }
 588                         }
 589                     }
 590                 }
 591             }
 592         }
 593
 594         unsigned int paint_directions = 0;
 595         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 596         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 597         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 598         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 599
 600         return paint_directions;
 601     }
 602 }
 603
 604 /**
 605  * \brief Push a point to be checked onto the bottom of the rendered pixel buffer check queue.
 606  * \param fill_queue The fill queue to add the point to.
 607  * \param max_queue_size The maximum size of the fill queue.
 608  * \param trace_t The trace pixel buffer pixel.
 609  * \param x The X coordinate.
 610  * \param y The Y coordinate.
 611  */
 612 static void push_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 613     if (!is_pixel_queued(trace_t)) {
 614         if ((fill_queue->size() < max_queue_size)) {
 615             fill_queue->push_back(NR::Point(x, y));
 616             mark_pixel_queued(trace_t);
 617         }
 618     }
 619 }
 620
 621 /**
 622  * \brief Shift a point to be checked onto the top of the rendered pixel buffer check queue.
 623  * \param fill_queue The fill queue to add the point to.
 624  * \param max_queue_size The maximum size of the fill queue.
 625  * \param trace_t The trace pixel buffer pixel.
 626  * \param x The X coordinate.
 627  * \param y The Y coordinate.
 628  */
 629 static void shift_point_onto_queue(std::deque<NR::Point> *fill_queue, unsigned int max_queue_size, unsigned char *trace_t, unsigned int x, unsigned int y) {
 630     if (!is_pixel_queued(trace_t)) {
 631         if ((fill_queue->size() < max_queue_size)) {
 632             fill_queue->push_front(NR::Point(x, y));
 633             mark_pixel_queued(trace_t);
 634         }
 635     }
 636 }
 637
 638 /**
 639  * \brief Scan a row in the rendered pixel buffer and add points to the fill queue as necessary.
 640  * \param fill_queue The fill queue to add the point to.
 641  * \param px The rendered pixel buffer.
 642  * \param trace_px The trace pixel buffer.
 643  * \param orig_color The original selected pixel to use as the fill target color.
 644  * \param bci The bitmap_coords_info structure.
 645  */
 646 static ScanlineCheckResult perform_bitmap_scanline_check(std::deque<NR::Point> *fill_queue, guchar *px, guchar *trace_px, unsigned char *orig_color, bitmap_coords_info bci) {
 647     bool aborted = false;
 648     bool reached_screen_boundary = false;
 649     bool ok;
 650
 651     bool keep_tracing;
 652     bool initial_paint = true;
 653
 654     unsigned char *current_trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 655     unsigned int paint_directions;
 656
 657     bool currently_painting_top = false;
 658     bool currently_painting_bottom = false;
 659
 660     unsigned int pix_width = bci.width * 4;
 661
 662     unsigned int top_ty = bci.y - 1;
 663     unsigned int bottom_ty = bci.y + 1;
 664
 665     bool can_paint_top = (top_ty > 0);
 666     bool can_paint_bottom = (bottom_ty < bci.height);
 667
 668     NR::Point t = fill_queue->front();
 669
 670     do {
 671         ok = false;
 672         if (bci.is_left) {
 673             keep_tracing = (bci.x != 0);
 674         } else {
 675             keep_tracing = (bci.x < bci.width);
 676         }
 677
 678         if (keep_tracing) {
 679             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 680                 paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 681                 if (bci.radius == 0) {
 682                     mark_pixel_checked(current_trace_t);
 683                     if ((t[NR::X] == bci.x) && (t[NR::Y] == bci.y)) {
 684                         fill_queue->pop_front(); t = fill_queue->front();
 685                     }
 686                 }
 687
 688                 if (can_paint_top) {
 689                     if (paint_directions & PAINT_DIRECTION_UP) {
 690                         unsigned char *trace_t = current_trace_t - pix_width;
 691                         if (!is_pixel_queued(trace_t)) {
 692                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci);
 693
 694                             if (initial_paint) { currently_painting_top = !ok_to_paint; }
 695
 696                             if (ok_to_paint && (!currently_painting_top)) {
 697                                 currently_painting_top = true;
 698                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty);
 699                             }
 700                             if ((!ok_to_paint) && currently_painting_top) {
 701                                 currently_painting_top = false;
 702                             }
 703                         }
 704                     }
 705                 }
 706
 707                 if (can_paint_bottom) {
 708                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 709                         unsigned char *trace_t = current_trace_t + pix_width;
 710                         if (!is_pixel_queued(trace_t)) {
 711                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci);
 712
 713                             if (initial_paint) { currently_painting_bottom = !ok_to_paint; }
 714
 715                             if (ok_to_paint && (!currently_painting_bottom)) {
 716                                 currently_painting_bottom = true;
 717                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty);
 718                             }
 719                             if ((!ok_to_paint) && currently_painting_bottom) {
 720                                 currently_painting_bottom = false;
 721                             }
 722                         }
 723                     }
 724                 }
 725
 726                 if (bci.is_left) {
 727                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 728                         bci.x -= 1; current_trace_t -= 4;
 729                         ok = true;
 730                     }
 731                 } else {
 732                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 733                         bci.x += 1; current_trace_t += 4;
 734                         ok = true;
 735                     }
 736                 }
 737
 738                 initial_paint = false;
 739             }
 740         } else {
 741             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 742                 aborted = true; break;
 743             } else {
 744                 reached_screen_boundary = true;
 745             }
 746         }
 747     } while (ok);
 748
 749     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 750     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 751     return SCANLINE_CHECK_OK;
 752 }
 753
 754 /**
 755  * \brief Sort the rendered pixel buffer check queue vertically.
 756  */
 757 static bool sort_fill_queue_vertical(NR::Point a, NR::Point b) {
 758     return a[NR::Y] > b[NR::Y];
 759 }
 760
 761 /**
 762  * \brief Sort the rendered pixel buffer check queue horizontally.
 763  */
 764 static bool sort_fill_queue_horizontal(NR::Point a, NR::Point b) {
 765     return a[NR::X] > b[NR::X];
 766 }
 767
 768 /**
 769  * \brief Perform a flood fill operation.
 770  * \param event_context The event context for this tool.
 771  * \param event The details of this event.
 772  * \param union_with_selection If true, union the new fill with the current selection.
 773  * \param is_point_fill If false, use the Rubberband "touch selection" to get the initial points for the fill.
 774  * \param is_touch_fill If true, use only the initial contact point in the Rubberband "touch selection" as the fill target color.
 775  */
 776 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 777     SPDesktop *desktop = event_context->desktop;
 778     SPDocument *document = sp_desktop_document(desktop);
 779
 780     /* Create new arena */
 781     NRArena *arena = NRArena::create();
 782     unsigned dkey = sp_item_display_key_new(1);
 783
 784     sp_document_ensure_up_to_date (document);
 785
 786     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 787     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 788
 789     if (!bbox) {
 790         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 791         return;
 792     }
 793
 794     double zoom_scale = desktop->current_zoom();
 795
 796     // Render 160% of the physical display to the render pixel buffer, so that available
 797     // fill areas off the screen can be included in the fill.
 798     double padding = 1.6;
 799
 800     NR::Rect screen = desktop->get_display_area();
 801
 802     unsigned int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 803     unsigned int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 804
 805     NR::Point origin(screen.min()[NR::X],
 806                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 807
 808     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 809     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 810
 811     NR::scale scale(zoom_scale, zoom_scale);
 812     NR::Matrix affine = scale * NR::translate(-origin * scale);
 813
 814     /* Create ArenaItems and set transform */
 815     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 816     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 817
 818     NRGC gc(NULL);
 819     gc.transform.set_identity();
 820
 821     NRRectL final_bbox;
 822     final_bbox.x0 = 0;
 823     final_bbox.y0 = 0; //row;
 824     final_bbox.x1 = width;
 825     final_bbox.y1 = height; //row + num_rows;
 826
 827     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 828
 829     guchar *px = g_new(guchar, 4 * width * height);
 830
 831     NRPixBlock B;
 832     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 833                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 834                               px, 4 * width, FALSE, FALSE );
 835
 836     SPNamedView *nv = sp_desktop_namedview(desktop);
 837     unsigned long bgcolor = nv->pagecolor;
 838
 839     unsigned char dtc[4];
 840     dtc[0] = NR_RGBA32_R(bgcolor);
 841     dtc[1] = NR_RGBA32_G(bgcolor);
 842     dtc[2] = NR_RGBA32_B(bgcolor);
 843     dtc[3] = NR_RGBA32_A(bgcolor);
 844
 845     for (unsigned int fy = 0; fy < height; fy++) {
 846         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 847         for (unsigned int fx = 0; fx < width; fx++) {
 848             for (int i = 0; i < 4; i++) {
 849                 *p++ = dtc[i];
 850             }
 851         }
 852     }
 853
 854     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 855     nr_pixblock_release(&B);
 856
 857     // Hide items
 858     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 859
 860     nr_arena_item_unref(root);
 861     nr_object_unref((NRObject *) arena);
 862
 863     guchar *trace_px = g_new(guchar, 4 * width * height);
 864     memset(trace_px, 0x00, 4 * width * height);
 865
 866     std::deque<NR::Point> fill_queue;
 867     std::queue<NR::Point> color_queue;
 868
 869     std::vector<NR::Point> fill_points;
 870
 871     bool aborted = false;
 872     int y_limit = height - 1;
 873
 874     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 875     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 876
 877     switch(method) {
 878         case FLOOD_CHANNELS_ALPHA:
 879         case FLOOD_CHANNELS_RGB:
 880         case FLOOD_CHANNELS_R:
 881         case FLOOD_CHANNELS_G:
 882         case FLOOD_CHANNELS_B:
 883             threshold = (255 * threshold) / 100;
 884             break;
 885         case FLOOD_CHANNELS_H:
 886         case FLOOD_CHANNELS_S:
 887         case FLOOD_CHANNELS_L:
 888             break;
 889     }
 890
 891     bitmap_coords_info bci;
 892
 893     bci.y_limit = y_limit;
 894     bci.width = width;
 895     bci.height = height;
 896     bci.threshold = threshold;
 897     bci.method = method;
 898     bci.bbox = *bbox;
 899     bci.screen = screen;
 900     bci.dtc = dtc;
 901     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 902     bci.max_queue_size = (width * height) / 4;
 903     bci.current_step = 0;
 904
 905     if (is_point_fill) {
 906         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 907     } else {
 908         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 909         fill_points = r->getPoints();
 910     }
 911
 912     for (unsigned int i = 0; i < fill_points.size(); i++) {
 913         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 914
 915         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 916         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 917
 918         if (is_touch_fill) {
 919             if (i == 0) {
 920                 color_queue.push(pw);
 921             } else {
 922                 unsigned char *trace_t = get_pixel(trace_px, (int)pw[NR::X], (int)pw[NR::Y], width);
 923                 push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[NR::X], (int)pw[NR::Y]);
 924             }
 925         } else {
 926             color_queue.push(pw);
 927         }
 928     }
 929
 930     bool reached_screen_boundary = false;
 931
 932     bool first_run = true;
 933
 934     unsigned long sort_size_threshold = 5;
 935
 936     while (!color_queue.empty() && !aborted) {
 937         NR::Point color_point = color_queue.front();
 938         color_queue.pop();
 939
 940         int cx = (int)color_point[NR::X];
 941         int cy = (int)color_point[NR::Y];
 942
 943         unsigned char *orig_px = get_pixel(px, cx, cy, width);
 944         unsigned char orig_color[4];
 945         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 946
 947         unsigned char merged_orig[3];
 948
 949         merge_pixel_with_background(orig_color, dtc, merged_orig);
 950
 951         bci.merged_orig_pixel = merged_orig;
 952
 953         unsigned char *trace_t = get_pixel(trace_px, cx, cy, width);
 954         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 955             if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) {
 956                 shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy);
 957
 958                 if (!first_run) {
 959                     for (unsigned int y = 0; y < height; y++) {
 960                         trace_t = get_pixel(trace_px, 0, y, width);
 961                         for (unsigned int x = 0; x < width; x++) {
 962                             clear_pixel_paintability(trace_t);
 963                             trace_t += 4;
 964                         }
 965                     }
 966                 }
 967                 first_run = false;
 968             }
 969         }
 970
 971         unsigned long old_fill_queue_size = fill_queue.size();
 972
 973         while (!fill_queue.empty() && !aborted) {
 974             NR::Point cp = fill_queue.front();
 975
 976             if (bci.radius == 0) {
 977                 unsigned long new_fill_queue_size = fill_queue.size();
 978
 979                 /*
 980                  * To reduce the number of points in the fill queue, periodically
 981                  * resort all of the points in the queue so that scanline checks
 982                  * can complete more quickly.  A point cannot be checked twice
 983                  * in a normal scanline checks, so forcing scanline checks to start
 984                  * from one corner of the rendered area as often as possible
 985                  * will reduce the number of points that need to be checked and queued.
 986                  */
 987                 if (new_fill_queue_size > sort_size_threshold) {
 988                     if (new_fill_queue_size > old_fill_queue_size) {
 989                         std::sort(fill_queue.begin(), fill_queue.end(), sort_fill_queue_vertical);
 990
 991                         std::deque<NR::Point>::iterator start_sort = fill_queue.begin();
 992                         std::deque<NR::Point>::iterator end_sort = fill_queue.begin();
 993                         unsigned int sort_y = (unsigned int)cp[NR::Y];
 994                         unsigned int current_y = sort_y;
 995
 996                         for (std::deque<NR::Point>::iterator i = fill_queue.begin(); i != fill_queue.end(); i++) {
 997                             NR::Point current = *i;
 998                             current_y = (unsigned int)current[NR::Y];
 999                             if (current_y != sort_y) {
1000                                 if (start_sort != end_sort) {
1001                                     std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
1002                                 }
1003                                 sort_y = current_y;
1004                                 start_sort = i;
1005                             }
1006                             end_sort = i;
1007                         }
1008                         if (start_sort != end_sort) {
1009                             std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
1010                         }
1011
1012                         cp = fill_queue.front();
1013                     }
1014                 }
1015
1016                 old_fill_queue_size = new_fill_queue_size;
1017             }
1018
1019             fill_queue.pop_front();
1020
1021             int x = (int)cp[NR::X];
1022             int y = (int)cp[NR::Y];
1023
1024             unsigned char *trace_t = get_pixel(trace_px, x, y, width);
1025             if (!is_pixel_checked(trace_t)) {
1026                 mark_pixel_checked(trace_t);
1027
1028                 if (y == 0) {
1029                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
1030                         aborted = true; break;
1031                     } else {
1032                         reached_screen_boundary = true;
1033                     }
1034                 }
1035
1036                 if (y == y_limit) {
1037                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
1038                         aborted = true; break;
1039                     } else {
1040                         reached_screen_boundary = true;
1041                     }
1042                 }
1043
1044                 bci.is_left = true;
1045                 bci.x = x;
1046                 bci.y = y;
1047
1048                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1049
1050                 switch (result) {
1051                     case SCANLINE_CHECK_ABORTED:
1052                         aborted = true;
1053                         break;
1054                     case SCANLINE_CHECK_BOUNDARY:
1055                         reached_screen_boundary = true;
1056                         break;
1057                     default:
1058                         break;
1059                 }
1060
1061                 if (bci.x < width) {
1062                     trace_t += 4;
1063                     if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) {
1064                         mark_pixel_checked(trace_t);
1065                         bci.is_left = false;
1066                         bci.x = x + 1;
1067
1068                         result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1069
1070                         switch (result) {
1071                             case SCANLINE_CHECK_ABORTED:
1072                                 aborted = true;
1073                                 break;
1074                             case SCANLINE_CHECK_BOUNDARY:
1075                                 reached_screen_boundary = true;
1076                                 break;
1077                             default:
1078                                 break;
1079                         }
1080                     }
1081                 }
1082             }
1083
1084             bci.current_step++;
1085
1086             if (bci.current_step > bci.max_queue_size) {
1087                 aborted = true;
1088             }
1089         }
1090     }
1091
1092     g_free(px);
1093
1094     if (aborted) {
1095         g_free(trace_px);
1096         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
1097         return;
1098     }
1099
1100     if (reached_screen_boundary) {
1101         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Only the visible part of the bounded area was filled.</b> If you want to fill all of the area, undo, zoom out, and fill again."));
1102     }
1103
1104     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
1105
1106     do_trace(bci, trace_px, desktop, inverted_affine, union_with_selection);
1107
1108     g_free(trace_px);
1109
1110     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
1111 }
1112
1113 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
1114 {
1115     gint ret = FALSE;
1116
1117     SPDesktop *desktop = event_context->desktop;
1118
1119     switch (event->type) {
1120     case GDK_BUTTON_PRESS:
1121         if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1 && !event_context->space_panning) {
1122             NR::Point const button_w(event->button.x,
1123                                     event->button.y);
1124
1125             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
1126
1127             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
1128             /* Set style */
1129             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
1130             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
1131             ret = TRUE;
1132         }
1133         break;
1134     default:
1135         break;
1136     }
1137
1138     if (((SPEventContextClass *) parent_class)->item_handler) {
1139         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
1140     }
1141
1142     return ret;
1143 }
1144
1145 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
1146 {
1147     static bool dragging;
1148
1149     gint ret = FALSE;
1150     SPDesktop *desktop = event_context->desktop;
1151
1152     switch (event->type) {
1153     case GDK_BUTTON_PRESS:
1154         if (event->button.button == 1 && !event_context->space_panning) {
1155             if (!(event->button.state & GDK_CONTROL_MASK)) {
1156                 NR::Point const button_w(event->button.x,
1157                                         event->button.y);
1158
1159                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1160                     // save drag origin
1161                     event_context->xp = (gint) button_w[NR::X];
1162                     event_context->yp = (gint) button_w[NR::Y];
1163                     event_context->within_tolerance = true;
1164
1165                     dragging = true;
1166
1167                     NR::Point const p(desktop->w2d(button_w));
1168                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1169                     Inkscape::Rubberband::get()->start(desktop, p);
1170                 }
1171             }
1172         }
1173     case GDK_MOTION_NOTIFY:
1174         if ( dragging
1175              && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
1176         {
1177             if ( event_context->within_tolerance
1178                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1179                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1180                 break; // do not drag if we're within tolerance from origin
1181             }
1182
1183             event_context->within_tolerance = false;
1184
1185             NR::Point const motion_pt(event->motion.x, event->motion.y);
1186             NR::Point const p(desktop->w2d(motion_pt));
1187             if (Inkscape::Rubberband::get()->is_started()) {
1188                 Inkscape::Rubberband::get()->move(p);
1189                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1190                 gobble_motion_events(GDK_BUTTON1_MASK);
1191             }
1192         }
1193         break;
1194
1195     case GDK_BUTTON_RELEASE:
1196         if (event->button.button == 1 && !event_context->space_panning) {
1197             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1198             if (r->is_started()) {
1199                 // set "busy" cursor
1200                 desktop->setWaitingCursor();
1201
1202                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1203                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1204                     // So check if the tool is valid before doing anything
1205                     dragging = false;
1206
1207                     bool is_point_fill = event_context->within_tolerance;
1208                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1209
1210                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1211
1212                     desktop->clearWaitingCursor();
1213                     // restore cursor when done; note that it may already be different if e.g. user
1214                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1215
1216                     ret = TRUE;
1217                 }
1218
1219                 r->stop();
1220
1221                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1222                     event_context->defaultMessageContext()->clear();
1223                 }
1224             }
1225         }
1226         break;
1227     case GDK_KEY_PRESS:
1228         switch (get_group0_keyval (&event->key)) {
1229         case GDK_Up:
1230         case GDK_Down:
1231         case GDK_KP_Up:
1232         case GDK_KP_Down:
1233             // prevent the zoom field from activation
1234             if (!MOD__CTRL_ONLY)
1235                 ret = TRUE;
1236             break;
1237         default:
1238             break;
1239         }
1240         break;
1241     default:
1242         break;
1243     }
1244
1245     if (!ret) {
1246         if (((SPEventContextClass *) parent_class)->root_handler) {
1247             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1248         }
1249     }
1250
1251     return ret;
1252 }
1253
1254
1255 static void sp_flood_finish(SPFloodContext *rc)
1256 {
1257     rc->_message_context->clear();
1258
1259     if ( rc->item != NULL ) {
1260         SPDesktop * desktop;
1261
1262         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1263
1264         SP_OBJECT(rc->item)->updateRepr();
1265
1266         sp_canvas_end_forced_full_redraws(desktop->canvas);
1267
1268         sp_desktop_selection(desktop)->set(rc->item);
1269         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1270                         _("Fill bounded area"));
1271
1272         rc->item = NULL;
1273     }
1274 }
1275
1276 void flood_channels_set_channels( gint channels )
1277 {
1278     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1279 }
1280
1281 /*
1282   Local Variables:
1283   mode:c++
1284   c-file-style:"stroustrup"
1285   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1286   indent-tabs-mode:nil
1287   fill-column:99
1288   End:
1289 */
1290 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :