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         trace_t = get_pixel(trace_px, 0, y, bci.width);
 414         for (unsigned int x = 0; x < bci.width ; x++) {
 415             gray_map->setPixel(gray_map, x, y, is_pixel_colored(trace_t) ? GRAYMAP_BLACK : GRAYMAP_WHITE);
 416             trace_t += 4;
 417         }
 418     }
 419
 420     Inkscape::Trace::Potrace::PotraceTracingEngine pte;
 421     std::vector<Inkscape::Trace::TracingEngineResult> results = pte.traceGrayMap(gray_map);
 422     gray_map->destroy(gray_map);
 423
 424     Inkscape::XML::Node *layer_repr = SP_GROUP(desktop->currentLayer())->repr;
 425     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 426
 427     long totalNodeCount = 0L;
 428
 429     double offset = prefs_get_double_attribute("tools.paintbucket", "offset", 0.0);
 430
 431     for (unsigned int i=0 ; i<results.size() ; i++) {
 432         Inkscape::Trace::TracingEngineResult result = results[i];
 433         totalNodeCount += result.getNodeCount();
 434
 435         Inkscape::XML::Node *pathRepr = xml_doc->createElement("svg:path");
 436         /* Set style */
 437         sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
 438
 439         NArtBpath *bpath = sp_svg_read_path(result.getPathData().c_str());
 440         Path *path = bpath_to_Path(bpath);
 441         g_free(bpath);
 442
 443         if (offset != 0) {
 444
 445             Shape *path_shape = new Shape();
 446
 447             path->ConvertWithBackData(0.03);
 448             path->Fill(path_shape, 0);
 449             delete path;
 450
 451             Shape *expanded_path_shape = new Shape();
 452
 453             expanded_path_shape->ConvertToShape(path_shape, fill_nonZero);
 454             path_shape->MakeOffset(expanded_path_shape, offset * desktop->current_zoom(), join_round, 4);
 455             expanded_path_shape->ConvertToShape(path_shape, fill_positive);
 456
 457             Path *expanded_path = new Path();
 458
 459             expanded_path->Reset();
 460             expanded_path_shape->ConvertToForme(expanded_path);
 461             expanded_path->ConvertEvenLines(1.0);
 462             expanded_path->Simplify(1.0);
 463
 464             delete path_shape;
 465             delete expanded_path_shape;
 466
 467             gchar *str = expanded_path->svg_dump_path();
 468             if (str && *str) {
 469                 pathRepr->setAttribute("d", str);
 470                 g_free(str);
 471             } else {
 472                 desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Too much inset</b>, the result is empty."));
 473                 Inkscape::GC::release(pathRepr);
 474                 g_free(str);
 475                 return;
 476             }
 477
 478             delete expanded_path;
 479
 480         } else {
 481             gchar *str = path->svg_dump_path();
 482             delete path;
 483             pathRepr->setAttribute("d", str);
 484             g_free(str);
 485         }
 486
 487         layer_repr->addChild(pathRepr, NULL);
 488
 489         SPObject *reprobj = document->getObjectByRepr(pathRepr);
 490         if (reprobj) {
 491             sp_item_write_transform(SP_ITEM(reprobj), pathRepr, transform, NULL);
 492
 493             // premultiply the item transform by the accumulated parent transform in the paste layer
 494             NR::Matrix local = sp_item_i2doc_affine(SP_GROUP(desktop->currentLayer()));
 495             if (!local.test_identity()) {
 496                 gchar const *t_str = pathRepr->attribute("transform");
 497                 NR::Matrix item_t (NR::identity());
 498                 if (t_str)
 499                     sp_svg_transform_read(t_str, &item_t);
 500                 item_t *= local.inverse();
 501                 // (we're dealing with unattached repr, so we write to its attr instead of using sp_item_set_transform)
 502                 gchar *affinestr=sp_svg_transform_write(item_t);
 503                 pathRepr->setAttribute("transform", affinestr);
 504                 g_free(affinestr);
 505             }
 506
 507             Inkscape::Selection *selection = sp_desktop_selection(desktop);
 508
 509             pathRepr->setPosition(-1);
 510
 511             if (union_with_selection) {
 512                 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)));
 513                 selection->add(reprobj);
 514                 sp_selected_path_union_skip_undo();
 515             } else {
 516                 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)));
 517                 selection->set(reprobj);
 518             }
 519
 520         }
 521
 522         Inkscape::GC::release(pathRepr);
 523
 524     }
 525 }
 526
 527 /**
 528  * \brief The possible return states of perform_bitmap_scanline_check()
 529  */
 530 enum ScanlineCheckResult {
 531     SCANLINE_CHECK_OK,
 532     SCANLINE_CHECK_ABORTED,
 533     SCANLINE_CHECK_BOUNDARY
 534 };
 535
 536 /**
 537  * \brief Determine if the provided coordinates are within the pixel buffer limits.
 538  * \param x The X coordinate.
 539  * \param y The Y coordinate.
 540  * \param bci The bitmap_coords_info structure.
 541  */
 542 inline static bool coords_in_range(unsigned int x, unsigned int y, bitmap_coords_info bci) {
 543     return (x < bci.width) &&
 544            (y < bci.height);
 545 }
 546
 547 #define PAINT_DIRECTION_LEFT 1
 548 #define PAINT_DIRECTION_RIGHT 2
 549 #define PAINT_DIRECTION_UP 4
 550 #define PAINT_DIRECTION_DOWN 8
 551 #define PAINT_DIRECTION_ALL 15
 552
 553 /**
 554  * \brief Paint a pixel or a square (if autogap is enabled) on the trace pixel buffer
 555  * \param px The rendered pixel buffer to check.
 556  * \param trace_px The trace pixel buffer.
 557  * \param orig_color The original selected pixel to use as the fill target color.
 558  * \param bci The bitmap_coords_info structure.
 559  * \param original_point_trace_t The original pixel in the trace pixel buffer to check.
 560  */
 561 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) {
 562     if (bci.radius == 0) {
 563         mark_pixel_colored(original_point_trace_t);
 564         return PAINT_DIRECTION_ALL;
 565     } else {
 566         unsigned char *trace_t;
 567
 568         bool can_paint_up = true;
 569         bool can_paint_down = true;
 570         bool can_paint_left = true;
 571         bool can_paint_right = true;
 572
 573         for (unsigned int ty = bci.y - bci.radius; ty <= bci.y + bci.radius; ty++) {
 574             for (unsigned int tx = bci.x - bci.radius; tx <= bci.x + bci.radius; tx++) {
 575                 if (coords_in_range(tx, ty, bci)) {
 576                     trace_t = get_pixel(trace_px, tx, ty, bci.width);
 577                     if (!is_pixel_colored(trace_t)) {
 578                         if (check_if_pixel_is_paintable(px, trace_t, tx, ty, orig_color, bci)) {
 579                             mark_pixel_colored(trace_t);
 580                         } else {
 581                             if (tx < bci.x) { can_paint_left = false; }
 582                             if (tx > bci.x) { can_paint_right = false; }
 583                             if (ty < bci.y) { can_paint_up = false; }
 584                             if (ty > bci.y) { can_paint_down = false; }
 585                         }
 586                     }
 587                 }
 588             }
 589         }
 590
 591         unsigned int paint_directions = 0;
 592         if (can_paint_left) { paint_directions += PAINT_DIRECTION_LEFT; }
 593         if (can_paint_right) { paint_directions += PAINT_DIRECTION_RIGHT; }
 594         if (can_paint_up) { paint_directions += PAINT_DIRECTION_UP; }
 595         if (can_paint_down) { paint_directions += PAINT_DIRECTION_DOWN; }
 596
 597         return paint_directions;
 598     }
 599 }
 600
 601 /**
 602  * \brief Push a point to be checked onto the bottom of the rendered pixel buffer check queue.
 603  * \param fill_queue The fill queue to add the point to.
 604  * \param max_queue_size The maximum size of the fill queue.
 605  * \param trace_t The trace pixel buffer pixel.
 606  * \param x The X coordinate.
 607  * \param y The Y coordinate.
 608  */
 609 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) {
 610     if (!is_pixel_queued(trace_t)) {
 611         if ((fill_queue->size() < max_queue_size)) {
 612             fill_queue->push_back(NR::Point(x, y));
 613             mark_pixel_queued(trace_t);
 614         }
 615     }
 616 }
 617
 618 /**
 619  * \brief Shift a point to be checked onto the top of the rendered pixel buffer check queue.
 620  * \param fill_queue The fill queue to add the point to.
 621  * \param max_queue_size The maximum size of the fill queue.
 622  * \param trace_t The trace pixel buffer pixel.
 623  * \param x The X coordinate.
 624  * \param y The Y coordinate.
 625  */
 626 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) {
 627     if (!is_pixel_queued(trace_t)) {
 628         if ((fill_queue->size() < max_queue_size)) {
 629             fill_queue->push_front(NR::Point(x, y));
 630             mark_pixel_queued(trace_t);
 631         }
 632     }
 633 }
 634
 635 /**
 636  * \brief Scan a row in the rendered pixel buffer and add points to the fill queue as necessary.
 637  * \param fill_queue The fill queue to add the point to.
 638  * \param px The rendered pixel buffer.
 639  * \param trace_px The trace pixel buffer.
 640  * \param orig_color The original selected pixel to use as the fill target color.
 641  * \param bci The bitmap_coords_info structure.
 642  */
 643 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) {
 644     bool aborted = false;
 645     bool reached_screen_boundary = false;
 646     bool ok;
 647
 648     bool keep_tracing;
 649     bool initial_paint = true;
 650
 651     unsigned char *current_trace_t = get_pixel(trace_px, bci.x, bci.y, bci.width);
 652     unsigned int paint_directions;
 653
 654     bool currently_painting_top = false;
 655     bool currently_painting_bottom = false;
 656
 657     unsigned int pix_width = bci.width * 4;
 658
 659     unsigned int top_ty = bci.y - 1;
 660     unsigned int bottom_ty = bci.y + 1;
 661
 662     bool can_paint_top = (top_ty > 0);
 663     bool can_paint_bottom = (bottom_ty < bci.height);
 664
 665     NR::Point t = fill_queue->front();
 666
 667     do {
 668         ok = false;
 669         if (bci.is_left) {
 670             keep_tracing = (bci.x != 0);
 671         } else {
 672             keep_tracing = (bci.x < bci.width);
 673         }
 674
 675         if (keep_tracing) {
 676             if (check_if_pixel_is_paintable(px, current_trace_t, bci.x, bci.y, orig_color, bci)) {
 677                 paint_directions = paint_pixel(px, trace_px, orig_color, bci, current_trace_t);
 678                 if (bci.radius == 0) {
 679                     mark_pixel_checked(current_trace_t);
 680                     if ((t[NR::X] == bci.x) && (t[NR::Y] == bci.y)) {
 681                         fill_queue->pop_front(); t = fill_queue->front();
 682                     }
 683                 }
 684
 685                 if (can_paint_top) {
 686                     if (paint_directions & PAINT_DIRECTION_UP) {
 687                         unsigned char *trace_t = current_trace_t - pix_width;
 688                         if (!is_pixel_queued(trace_t)) {
 689                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, top_ty, orig_color, bci);
 690
 691                             if (initial_paint) { currently_painting_top = !ok_to_paint; }
 692
 693                             if (ok_to_paint && (!currently_painting_top)) {
 694                                 currently_painting_top = true;
 695                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, top_ty);
 696                             }
 697                             if ((!ok_to_paint) && currently_painting_top) {
 698                                 currently_painting_top = false;
 699                             }
 700                         }
 701                     }
 702                 }
 703
 704                 if (can_paint_bottom) {
 705                     if (paint_directions & PAINT_DIRECTION_DOWN) {
 706                         unsigned char *trace_t = current_trace_t + pix_width;
 707                         if (!is_pixel_queued(trace_t)) {
 708                             bool ok_to_paint = check_if_pixel_is_paintable(px, trace_t, bci.x, bottom_ty, orig_color, bci);
 709
 710                             if (initial_paint) { currently_painting_bottom = !ok_to_paint; }
 711
 712                             if (ok_to_paint && (!currently_painting_bottom)) {
 713                                 currently_painting_bottom = true;
 714                                 push_point_onto_queue(fill_queue, bci.max_queue_size, trace_t, bci.x, bottom_ty);
 715                             }
 716                             if ((!ok_to_paint) && currently_painting_bottom) {
 717                                 currently_painting_bottom = false;
 718                             }
 719                         }
 720                     }
 721                 }
 722
 723                 if (bci.is_left) {
 724                     if (paint_directions & PAINT_DIRECTION_LEFT) {
 725                         bci.x -= 1; current_trace_t -= 4;
 726                         ok = true;
 727                     }
 728                 } else {
 729                     if (paint_directions & PAINT_DIRECTION_RIGHT) {
 730                         bci.x += 1; current_trace_t += 4;
 731                         ok = true;
 732                     }
 733                 }
 734
 735                 initial_paint = false;
 736             }
 737         } else {
 738             if (bci.bbox.min()[NR::X] > bci.screen.min()[NR::X]) {
 739                 aborted = true; break;
 740             } else {
 741                 reached_screen_boundary = true;
 742             }
 743         }
 744     } while (ok);
 745
 746     if (aborted) { return SCANLINE_CHECK_ABORTED; }
 747     if (reached_screen_boundary) { return SCANLINE_CHECK_BOUNDARY; }
 748     return SCANLINE_CHECK_OK;
 749 }
 750
 751 /**
 752  * \brief Sort the rendered pixel buffer check queue vertically.
 753  */
 754 static bool sort_fill_queue_vertical(NR::Point a, NR::Point b) {
 755     return a[NR::Y] > b[NR::Y];
 756 }
 757
 758 /**
 759  * \brief Sort the rendered pixel buffer check queue horizontally.
 760  */
 761 static bool sort_fill_queue_horizontal(NR::Point a, NR::Point b) {
 762     return a[NR::X] > b[NR::X];
 763 }
 764
 765 /**
 766  * \brief Perform a flood fill operation.
 767  * \param event_context The event context for this tool.
 768  * \param event The details of this event.
 769  * \param union_with_selection If true, union the new fill with the current selection.
 770  * \param is_point_fill If false, use the Rubberband "touch selection" to get the initial points for the fill.
 771  * \param is_touch_fill If true, use only the initial contact point in the Rubberband "touch selection" as the fill target color.
 772  */
 773 static void sp_flood_do_flood_fill(SPEventContext *event_context, GdkEvent *event, bool union_with_selection, bool is_point_fill, bool is_touch_fill) {
 774     SPDesktop *desktop = event_context->desktop;
 775     SPDocument *document = sp_desktop_document(desktop);
 776
 777     /* Create new arena */
 778     NRArena *arena = NRArena::create();
 779     unsigned dkey = sp_item_display_key_new(1);
 780
 781     sp_document_ensure_up_to_date (document);
 782
 783     SPItem *document_root = SP_ITEM(SP_DOCUMENT_ROOT(document));
 784     NR::Maybe<NR::Rect> bbox = document_root->getBounds(NR::identity());
 785
 786     if (!bbox) {
 787         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
 788         return;
 789     }
 790
 791     double zoom_scale = desktop->current_zoom();
 792
 793     // Render 160% of the physical display to the render pixel buffer, so that available
 794     // fill areas off the screen can be included in the fill.
 795     double padding = 1.6;
 796
 797     NR::Rect screen = desktop->get_display_area();
 798
 799     unsigned int width = (int)ceil(screen.extent(NR::X) * zoom_scale * padding);
 800     unsigned int height = (int)ceil(screen.extent(NR::Y) * zoom_scale * padding);
 801
 802     NR::Point origin(screen.min()[NR::X],
 803                      sp_document_height(document) - screen.extent(NR::Y) - screen.min()[NR::Y]);
 804
 805     origin[NR::X] = origin[NR::X] + (screen.extent(NR::X) * ((1 - padding) / 2));
 806     origin[NR::Y] = origin[NR::Y] + (screen.extent(NR::Y) * ((1 - padding) / 2));
 807
 808     NR::scale scale(zoom_scale, zoom_scale);
 809     NR::Matrix affine = scale * NR::translate(-origin * scale);
 810
 811     /* Create ArenaItems and set transform */
 812     NRArenaItem *root = sp_item_invoke_show(SP_ITEM(sp_document_root(document)), arena, dkey, SP_ITEM_SHOW_DISPLAY);
 813     nr_arena_item_set_transform(NR_ARENA_ITEM(root), affine);
 814
 815     NRGC gc(NULL);
 816     gc.transform.set_identity();
 817
 818     NRRectL final_bbox;
 819     final_bbox.x0 = 0;
 820     final_bbox.y0 = 0; //row;
 821     final_bbox.x1 = width;
 822     final_bbox.y1 = height; //row + num_rows;
 823
 824     nr_arena_item_invoke_update(root, &final_bbox, &gc, NR_ARENA_ITEM_STATE_ALL, NR_ARENA_ITEM_STATE_NONE);
 825
 826     guchar *px = g_new(guchar, 4 * width * height);
 827
 828     NRPixBlock B;
 829     nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
 830                               final_bbox.x0, final_bbox.y0, final_bbox.x1, final_bbox.y1,
 831                               px, 4 * width, FALSE, FALSE );
 832
 833     SPNamedView *nv = sp_desktop_namedview(desktop);
 834     unsigned long bgcolor = nv->pagecolor;
 835
 836     unsigned char dtc[4];
 837     dtc[0] = NR_RGBA32_R(bgcolor);
 838     dtc[1] = NR_RGBA32_G(bgcolor);
 839     dtc[2] = NR_RGBA32_B(bgcolor);
 840     dtc[3] = NR_RGBA32_A(bgcolor);
 841
 842     for (unsigned int fy = 0; fy < height; fy++) {
 843         guchar *p = NR_PIXBLOCK_PX(&B) + fy * B.rs;
 844         for (unsigned int fx = 0; fx < width; fx++) {
 845             for (int i = 0; i < 4; i++) {
 846                 *p++ = dtc[i];
 847             }
 848         }
 849     }
 850
 851     nr_arena_item_invoke_render(NULL, root, &final_bbox, &B, NR_ARENA_ITEM_RENDER_NO_CACHE );
 852     nr_pixblock_release(&B);
 853
 854     // Hide items
 855     sp_item_invoke_hide(SP_ITEM(sp_document_root(document)), dkey);
 856
 857     nr_arena_item_unref(root);
 858     nr_object_unref((NRObject *) arena);
 859
 860     guchar *trace_px = g_new(guchar, 4 * width * height);
 861     memset(trace_px, 0x00, 4 * width * height);
 862
 863     std::deque<NR::Point> fill_queue;
 864     std::queue<NR::Point> color_queue;
 865
 866     std::vector<NR::Point> fill_points;
 867
 868     bool aborted = false;
 869     int y_limit = height - 1;
 870
 871     PaintBucketChannels method = (PaintBucketChannels)prefs_get_int_attribute("tools.paintbucket", "channels", 0);
 872     int threshold = prefs_get_int_attribute_limited("tools.paintbucket", "threshold", 1, 0, 100);
 873
 874     switch(method) {
 875         case FLOOD_CHANNELS_ALPHA:
 876         case FLOOD_CHANNELS_RGB:
 877         case FLOOD_CHANNELS_R:
 878         case FLOOD_CHANNELS_G:
 879         case FLOOD_CHANNELS_B:
 880             threshold = (255 * threshold) / 100;
 881             break;
 882         case FLOOD_CHANNELS_H:
 883         case FLOOD_CHANNELS_S:
 884         case FLOOD_CHANNELS_L:
 885             break;
 886     }
 887
 888     bitmap_coords_info bci;
 889
 890     bci.y_limit = y_limit;
 891     bci.width = width;
 892     bci.height = height;
 893     bci.threshold = threshold;
 894     bci.method = method;
 895     bci.bbox = *bbox;
 896     bci.screen = screen;
 897     bci.dtc = dtc;
 898     bci.radius = prefs_get_int_attribute_limited("tools.paintbucket", "autogap", 0, 0, 3);
 899     bci.max_queue_size = (width * height) / 4;
 900     bci.current_step = 0;
 901
 902     if (is_point_fill) {
 903         fill_points.push_back(NR::Point(event->button.x, event->button.y));
 904     } else {
 905         Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
 906         fill_points = r->getPoints();
 907     }
 908
 909     for (unsigned int i = 0; i < fill_points.size(); i++) {
 910         NR::Point pw = NR::Point(fill_points[i][NR::X] / zoom_scale, sp_document_height(document) + (fill_points[i][NR::Y] / zoom_scale)) * affine;
 911
 912         pw[NR::X] = (int)MIN(width - 1, MAX(0, pw[NR::X]));
 913         pw[NR::Y] = (int)MIN(height - 1, MAX(0, pw[NR::Y]));
 914
 915         if (is_touch_fill) {
 916             if (i == 0) {
 917                 color_queue.push(pw);
 918             } else {
 919                 unsigned char *trace_t = get_pixel(trace_px, (int)pw[NR::X], (int)pw[NR::Y], width);
 920                 push_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, (int)pw[NR::X], (int)pw[NR::Y]);
 921             }
 922         } else {
 923             color_queue.push(pw);
 924         }
 925     }
 926
 927     bool reached_screen_boundary = false;
 928
 929     bool first_run = true;
 930
 931     unsigned long sort_size_threshold = 5;
 932
 933     while (!color_queue.empty() && !aborted) {
 934         NR::Point color_point = color_queue.front();
 935         color_queue.pop();
 936
 937         int cx = (int)color_point[NR::X];
 938         int cy = (int)color_point[NR::Y];
 939
 940         unsigned char *orig_px = get_pixel(px, cx, cy, width);
 941         unsigned char orig_color[4];
 942         for (int i = 0; i < 4; i++) { orig_color[i] = orig_px[i]; }
 943
 944         unsigned char merged_orig[3];
 945
 946         merge_pixel_with_background(orig_color, dtc, merged_orig);
 947
 948         bci.merged_orig_pixel = merged_orig;
 949
 950         unsigned char *trace_t = get_pixel(trace_px, cx, cy, width);
 951         if (!is_pixel_checked(trace_t) && !is_pixel_colored(trace_t)) {
 952             if (check_if_pixel_is_paintable(px, trace_px, cx, cy, orig_color, bci)) {
 953                 shift_point_onto_queue(&fill_queue, bci.max_queue_size, trace_t, cx, cy);
 954
 955                 if (!first_run) {
 956                     for (unsigned int y = 0; y < height; y++) {
 957                         trace_t = get_pixel(trace_px, 0, y, width);
 958                         for (unsigned int x = 0; x < width; x++) {
 959                             clear_pixel_paintability(trace_t);
 960                             trace_t += 4;
 961                         }
 962                     }
 963                 }
 964                 first_run = false;
 965             }
 966         }
 967
 968         unsigned long old_fill_queue_size = fill_queue.size();
 969
 970         while (!fill_queue.empty() && !aborted) {
 971             NR::Point cp = fill_queue.front();
 972
 973             if (bci.radius == 0) {
 974                 unsigned long new_fill_queue_size = fill_queue.size();
 975
 976                 /*
 977                  * To reduce the number of points in the fill queue, periodically
 978                  * resort all of the points in the queue so that scanline checks
 979                  * can complete more quickly.  A point cannot be checked twice
 980                  * in a normal scanline checks, so forcing scanline checks to start
 981                  * from one corner of the rendered area as often as possible
 982                  * will reduce the number of points that need to be checked and queued.
 983                  */
 984                 if (new_fill_queue_size > sort_size_threshold) {
 985                     if (new_fill_queue_size > old_fill_queue_size) {
 986                         std::sort(fill_queue.begin(), fill_queue.end(), sort_fill_queue_vertical);
 987
 988                         std::deque<NR::Point>::iterator start_sort = fill_queue.begin();
 989                         std::deque<NR::Point>::iterator end_sort = fill_queue.begin();
 990                         unsigned int sort_y = (unsigned int)cp[NR::Y];
 991                         unsigned int current_y = sort_y;
 992
 993                         for (std::deque<NR::Point>::iterator i = fill_queue.begin(); i != fill_queue.end(); i++) {
 994                             NR::Point current = *i;
 995                             current_y = (unsigned int)current[NR::Y];
 996                             if (current_y != sort_y) {
 997                                 if (start_sort != end_sort) {
 998                                     std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
 999                                 }
1000                                 sort_y = current_y;
1001                                 start_sort = i;
1002                             }
1003                             end_sort = i;
1004                         }
1005                         if (start_sort != end_sort) {
1006                             std::sort(start_sort, end_sort, sort_fill_queue_horizontal);
1007                         }
1008
1009                         cp = fill_queue.front();
1010                     }
1011                 }
1012
1013                 old_fill_queue_size = new_fill_queue_size;
1014             }
1015
1016             fill_queue.pop_front();
1017
1018             int x = (int)cp[NR::X];
1019             int y = (int)cp[NR::Y];
1020
1021             unsigned char *trace_t = get_pixel(trace_px, x, y, width);
1022             if (!is_pixel_checked(trace_t)) {
1023                 mark_pixel_checked(trace_t);
1024
1025                 if (y == 0) {
1026                     if (bbox->min()[NR::Y] > screen.min()[NR::Y]) {
1027                         aborted = true; break;
1028                     } else {
1029                         reached_screen_boundary = true;
1030                     }
1031                 }
1032
1033                 if (y == y_limit) {
1034                     if (bbox->max()[NR::Y] < screen.max()[NR::Y]) {
1035                         aborted = true; break;
1036                     } else {
1037                         reached_screen_boundary = true;
1038                     }
1039                 }
1040
1041                 bci.is_left = true;
1042                 bci.x = x;
1043                 bci.y = y;
1044
1045                 ScanlineCheckResult result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1046
1047                 switch (result) {
1048                     case SCANLINE_CHECK_ABORTED:
1049                         aborted = true;
1050                         break;
1051                     case SCANLINE_CHECK_BOUNDARY:
1052                         reached_screen_boundary = true;
1053                         break;
1054                     default:
1055                         break;
1056                 }
1057
1058                 if (bci.x < width) {
1059                     trace_t += 4;
1060                     if (!is_pixel_checked(trace_t) && !is_pixel_queued(trace_t)) {
1061                         mark_pixel_checked(trace_t);
1062                         bci.is_left = false;
1063                         bci.x = x + 1;
1064
1065                         result = perform_bitmap_scanline_check(&fill_queue, px, trace_px, orig_color, bci);
1066
1067                         switch (result) {
1068                             case SCANLINE_CHECK_ABORTED:
1069                                 aborted = true;
1070                                 break;
1071                             case SCANLINE_CHECK_BOUNDARY:
1072                                 reached_screen_boundary = true;
1073                                 break;
1074                             default:
1075                                 break;
1076                         }
1077                     }
1078                 }
1079             }
1080
1081             bci.current_step++;
1082
1083             if (bci.current_step > bci.max_queue_size) {
1084                 aborted = true;
1085             }
1086         }
1087     }
1088
1089     g_free(px);
1090
1091     if (aborted) {
1092         g_free(trace_px);
1093         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("<b>Area is not bounded</b>, cannot fill."));
1094         return;
1095     }
1096
1097     if (reached_screen_boundary) {
1098         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."));
1099     }
1100
1101     NR::Matrix inverted_affine = NR::Matrix(affine).inverse();
1102
1103     do_trace(bci, trace_px, desktop, inverted_affine, union_with_selection);
1104
1105     g_free(trace_px);
1106
1107     sp_document_done(document, SP_VERB_CONTEXT_PAINTBUCKET, _("Fill bounded area"));
1108 }
1109
1110 static gint sp_flood_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)
1111 {
1112     gint ret = FALSE;
1113
1114     SPDesktop *desktop = event_context->desktop;
1115
1116     switch (event->type) {
1117     case GDK_BUTTON_PRESS:
1118         if ((event->button.state & GDK_CONTROL_MASK) && event->button.button == 1 && !event_context->space_panning) {
1119             NR::Point const button_w(event->button.x,
1120                                     event->button.y);
1121
1122             SPItem *item = sp_event_context_find_item (desktop, button_w, TRUE, TRUE);
1123
1124             Inkscape::XML::Node *pathRepr = SP_OBJECT_REPR(item);
1125             /* Set style */
1126             sp_desktop_apply_style_tool (desktop, pathRepr, "tools.paintbucket", false);
1127             sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET, _("Set style on object"));
1128             ret = TRUE;
1129         }
1130         break;
1131     default:
1132         break;
1133     }
1134
1135     if (((SPEventContextClass *) parent_class)->item_handler) {
1136         ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event);
1137     }
1138
1139     return ret;
1140 }
1141
1142 static gint sp_flood_context_root_handler(SPEventContext *event_context, GdkEvent *event)
1143 {
1144     static bool dragging;
1145
1146     gint ret = FALSE;
1147     SPDesktop *desktop = event_context->desktop;
1148
1149     switch (event->type) {
1150     case GDK_BUTTON_PRESS:
1151         if (event->button.button == 1 && !event_context->space_panning) {
1152             if (!(event->button.state & GDK_CONTROL_MASK)) {
1153                 NR::Point const button_w(event->button.x,
1154                                         event->button.y);
1155
1156                 if (Inkscape::have_viable_layer(desktop, event_context->defaultMessageContext())) {
1157                     // save drag origin
1158                     event_context->xp = (gint) button_w[NR::X];
1159                     event_context->yp = (gint) button_w[NR::Y];
1160                     event_context->within_tolerance = true;
1161
1162                     dragging = true;
1163
1164                     NR::Point const p(desktop->w2d(button_w));
1165                     Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
1166                     Inkscape::Rubberband::get()->start(desktop, p);
1167                 }
1168             }
1169         }
1170     case GDK_MOTION_NOTIFY:
1171         if ( dragging
1172              && ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)
1173         {
1174             if ( event_context->within_tolerance
1175                  && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )
1176                  && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {
1177                 break; // do not drag if we're within tolerance from origin
1178             }
1179
1180             event_context->within_tolerance = false;
1181
1182             NR::Point const motion_pt(event->motion.x, event->motion.y);
1183             NR::Point const p(desktop->w2d(motion_pt));
1184             if (Inkscape::Rubberband::get()->is_started()) {
1185                 Inkscape::Rubberband::get()->move(p);
1186                 event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw over</b> areas to add to fill, hold <b>Alt</b> for touch fill"));
1187                 gobble_motion_events(GDK_BUTTON1_MASK);
1188             }
1189         }
1190         break;
1191
1192     case GDK_BUTTON_RELEASE:
1193         if (event->button.button == 1 && !event_context->space_panning) {
1194             Inkscape::Rubberband::Rubberband *r = Inkscape::Rubberband::get();
1195             if (r->is_started()) {
1196                 // set "busy" cursor
1197                 desktop->setWaitingCursor();
1198
1199                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1200                     // Since setWaitingCursor runs main loop iterations, we may have already left this tool!
1201                     // So check if the tool is valid before doing anything
1202                     dragging = false;
1203
1204                     bool is_point_fill = event_context->within_tolerance;
1205                     bool is_touch_fill = event->button.state & GDK_MOD1_MASK;
1206
1207                     sp_flood_do_flood_fill(event_context, event, event->button.state & GDK_SHIFT_MASK, is_point_fill, is_touch_fill);
1208
1209                     desktop->clearWaitingCursor();
1210                     // restore cursor when done; note that it may already be different if e.g. user
1211                     // switched to another tool during interruptible tracing or drawing, in which case do nothing
1212
1213                     ret = TRUE;
1214                 }
1215
1216                 r->stop();
1217
1218                 if (SP_IS_EVENT_CONTEXT(event_context)) {
1219                     event_context->defaultMessageContext()->clear();
1220                 }
1221             }
1222         }
1223         break;
1224     case GDK_KEY_PRESS:
1225         switch (get_group0_keyval (&event->key)) {
1226         case GDK_Up:
1227         case GDK_Down:
1228         case GDK_KP_Up:
1229         case GDK_KP_Down:
1230             // prevent the zoom field from activation
1231             if (!MOD__CTRL_ONLY)
1232                 ret = TRUE;
1233             break;
1234         default:
1235             break;
1236         }
1237         break;
1238     default:
1239         break;
1240     }
1241
1242     if (!ret) {
1243         if (((SPEventContextClass *) parent_class)->root_handler) {
1244             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1245         }
1246     }
1247
1248     return ret;
1249 }
1250
1251
1252 static void sp_flood_finish(SPFloodContext *rc)
1253 {
1254     rc->_message_context->clear();
1255
1256     if ( rc->item != NULL ) {
1257         SPDesktop * desktop;
1258
1259         desktop = SP_EVENT_CONTEXT_DESKTOP(rc);
1260
1261         SP_OBJECT(rc->item)->updateRepr();
1262
1263         sp_canvas_end_forced_full_redraws(desktop->canvas);
1264
1265         sp_desktop_selection(desktop)->set(rc->item);
1266         sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_PAINTBUCKET,
1267                         _("Fill bounded area"));
1268
1269         rc->item = NULL;
1270     }
1271 }
1272
1273 void flood_channels_set_channels( gint channels )
1274 {
1275     prefs_set_int_attribute("tools.paintbucket", "channels", channels);
1276 }
1277
1278 /*
1279   Local Variables:
1280   mode:c++
1281   c-file-style:"stroustrup"
1282   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1283   indent-tabs-mode:nil
1284   fill-column:99
1285   End:
1286 */
1287 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :