src/tweak-context.cpp

   1 #define __SP_TWEAK_CONTEXT_C__
   2
   3 /*
   4  * tweaking paths without node editing
   5  *
   6  * Authors:
   7  *   bulia byak
   8  *
   9  * Copyright (C) 2007 authors
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #include "config.h"
  15
  16 #include <gtk/gtk.h>
  17 #include <gdk/gdkkeysyms.h>
  18 #include <glibmm/i18n.h>
  19
  20 #include <numeric>
  21
  22 #include "svg/svg.h"
  23 #include "display/canvas-bpath.h"
  24
  25 #include <glib/gmem.h>
  26 #include "macros.h"
  27 #include "document.h"
  28 #include "selection.h"
  29 #include "desktop.h"
  30 #include "desktop-events.h"
  31 #include "desktop-handles.h"
  32 #include "desktop-style.h"
  33 #include "message-context.h"
  34 #include "pixmaps/cursor-tweak-move.xpm"
  35 #include "pixmaps/cursor-thin.xpm"
  36 #include "pixmaps/cursor-thicken.xpm"
  37 #include "pixmaps/cursor-attract.xpm"
  38 #include "pixmaps/cursor-repel.xpm"
  39 #include "pixmaps/cursor-push.xpm"
  40 #include "pixmaps/cursor-roughen.xpm"
  41 #include "pixmaps/cursor-color.xpm"
  42 #include <boost/optional.hpp>
  43 #include "libnr/nr-matrix-ops.h"
  44 #include "libnr/nr-scale-translate-ops.h"
  45 #include "xml/repr.h"
  46 #include "context-fns.h"
  47 #include "sp-item.h"
  48 #include "inkscape.h"
  49 #include "color.h"
  50 #include "svg/svg-color.h"
  51 #include "splivarot.h"
  52 #include "sp-item-group.h"
  53 #include "sp-shape.h"
  54 #include "sp-path.h"
  55 #include "path-chemistry.h"
  56 #include "sp-gradient.h"
  57 #include "sp-stop.h"
  58 #include "sp-gradient-reference.h"
  59 #include "sp-linear-gradient.h"
  60 #include "sp-radial-gradient.h"
  61 #include "gradient-chemistry.h"
  62 #include "sp-text.h"
  63 #include "sp-flowtext.h"
  64 #include "display/canvas-bpath.h"
  65 #include "display/canvas-arena.h"
  66 #include "display/curve.h"
  67 #include "livarot/Shape.h"
  68 #include <2geom/isnan.h>
  69 #include <2geom/transforms.h>
  70 #include "preferences.h"
  71 #include "style.h"
  72 #include "box3d.h"
  73 #include "sp-item-transform.h"
  74 #include "filter-chemistry.h"
  75 #include "sp-gaussian-blur-fns.h"
  76 #include "sp-gaussian-blur.h"
  77
  78 #include "tweak-context.h"
  79
  80 #define DDC_RED_RGBA 0xff0000ff
  81
  82 #define DYNA_MIN_WIDTH 1.0e-6
  83
  84 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  85 static void sp_tweak_context_init(SPTweakContext *ddc);
  86 static void sp_tweak_context_dispose(GObject *object);
  87
  88 static void sp_tweak_context_setup(SPEventContext *ec);
  89 static void sp_tweak_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
  90 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
  91
  92 static SPEventContextClass *parent_class;
  93
  94 GtkType
  95 sp_tweak_context_get_type(void)
  96 {
  97     static GType type = 0;
  98     if (!type) {
  99         GTypeInfo info = {
 100             sizeof(SPTweakContextClass),
 101             NULL, NULL,
 102             (GClassInitFunc) sp_tweak_context_class_init,
 103             NULL, NULL,
 104             sizeof(SPTweakContext),
 105             4,
 106             (GInstanceInitFunc) sp_tweak_context_init,
 107             NULL,   /* value_table */
 108         };
 109         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 110     }
 111     return type;
 112 }
 113
 114 static void
 115 sp_tweak_context_class_init(SPTweakContextClass *klass)
 116 {
 117     GObjectClass *object_class = (GObjectClass *) klass;
 118     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 119
 120     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 121
 122     object_class->dispose = sp_tweak_context_dispose;
 123
 124     event_context_class->setup = sp_tweak_context_setup;
 125     event_context_class->set = sp_tweak_context_set;
 126     event_context_class->root_handler = sp_tweak_context_root_handler;
 127 }
 128
 129 static void
 130 sp_tweak_context_init(SPTweakContext *tc)
 131 {
 132     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 133
 134     event_context->cursor_shape = cursor_push_xpm;
 135     event_context->hot_x = 4;
 136     event_context->hot_y = 4;
 137
 138     /* attributes */
 139     tc->dragging = FALSE;
 140
 141     tc->width = 0.2;
 142     tc->force = 0.2;
 143     tc->pressure = TC_DEFAULT_PRESSURE;
 144
 145     tc->is_dilating = false;
 146     tc->has_dilated = false;
 147
 148     tc->do_h = true;
 149     tc->do_s = true;
 150     tc->do_l = true;
 151     tc->do_o = false;
 152
 153     new (&tc->style_set_connection) sigc::connection();
 154 }
 155
 156 static void
 157 sp_tweak_context_dispose(GObject *object)
 158 {
 159     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 160
 161     tc->style_set_connection.disconnect();
 162     tc->style_set_connection.~connection();
 163
 164     if (tc->dilate_area) {
 165         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 166         tc->dilate_area = NULL;
 167     }
 168
 169     if (tc->_message_context) {
 170         delete tc->_message_context;
 171     }
 172
 173     G_OBJECT_CLASS(parent_class)->dispose(object);
 174 }
 175
 176 bool is_transform_mode (gint mode)
 177 {
 178     return (mode == TWEAK_MODE_MOVE ||
 179             mode == TWEAK_MODE_MOVE_IN_OUT ||
 180             mode == TWEAK_MODE_MOVE_JITTER ||
 181             mode == TWEAK_MODE_SCALE ||
 182             mode == TWEAK_MODE_ROTATE ||
 183             mode == TWEAK_MODE_MORELESS);
 184 }
 185
 186 bool is_color_mode (gint mode)
 187 {
 188     return (mode == TWEAK_MODE_COLORPAINT || mode == TWEAK_MODE_COLORJITTER || mode == TWEAK_MODE_BLUR);
 189 }
 190
 191 void
 192 sp_tweak_update_cursor (SPTweakContext *tc, bool with_shift)
 193 {
 194    SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 195    SPDesktop *desktop = event_context->desktop;
 196
 197                 guint num = 0;
 198                 gchar *sel_message = NULL;
 199                 if (!desktop->selection->isEmpty()) {
 200                     num = g_slist_length((GSList *) desktop->selection->itemList());
 201                     sel_message = g_strdup_printf(ngettext("<b>%i</b> object selected","<b>%i</b> objects selected",num), num);
 202                 } else {
 203                     sel_message = g_strdup_printf(_("<b>Nothing</b> selected"));
 204                 }
 205
 206
 207    switch (tc->mode) {
 208        case TWEAK_MODE_MOVE:
 209            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag to <b>move</b>."), sel_message);
 210            event_context->cursor_shape = cursor_tweak_move_xpm;
 211            break;
 212        case TWEAK_MODE_MOVE_IN_OUT:
 213            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>move in</b>; with Shift to <b>move out</b>."), sel_message);
 214            event_context->cursor_shape = cursor_tweak_move_xpm;
 215            break;
 216        case TWEAK_MODE_MOVE_JITTER:
 217            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>move randomly</b>."), sel_message);
 218            event_context->cursor_shape = cursor_tweak_move_xpm;
 219            break;
 220        case TWEAK_MODE_SCALE:
 221            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>scale down</b>; with Shift to <b>scale up</b>."), sel_message);
 222            event_context->cursor_shape = cursor_tweak_move_xpm;
 223            break;
 224        case TWEAK_MODE_ROTATE:
 225            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>rotate clockwise</b>; with Shift, <b>counterclockwise</b>."), sel_message);
 226            event_context->cursor_shape = cursor_tweak_move_xpm;
 227            break;
 228        case TWEAK_MODE_MORELESS:
 229            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>duplicate</b>; with Shift, <b>delete</b>."), sel_message);
 230            event_context->cursor_shape = cursor_tweak_move_xpm;
 231            break;
 232        case TWEAK_MODE_PUSH:
 233            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag to <b>push paths</b>."), sel_message);
 234            event_context->cursor_shape = cursor_push_xpm;
 235            break;
 236        case TWEAK_MODE_SHRINK_GROW:
 237            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>inset paths</b>; with Shift to <b>outset</b>."), sel_message);
 238            if (with_shift) {
 239                event_context->cursor_shape = cursor_thicken_xpm;
 240            } else {
 241                event_context->cursor_shape = cursor_thin_xpm;
 242            }
 243            break;
 244        case TWEAK_MODE_ATTRACT_REPEL:
 245            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>attract paths</b>; with Shift to <b>repel</b>."), sel_message);
 246            if (with_shift) {
 247                event_context->cursor_shape = cursor_repel_xpm;
 248            } else {
 249                event_context->cursor_shape = cursor_attract_xpm;
 250            }
 251            break;
 252        case TWEAK_MODE_ROUGHEN:
 253            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>roughen paths</b>."), sel_message);
 254            event_context->cursor_shape = cursor_roughen_xpm;
 255            break;
 256        case TWEAK_MODE_COLORPAINT:
 257            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>paint objects</b> with color."), sel_message);
 258            event_context->cursor_shape = cursor_color_xpm;
 259            break;
 260        case TWEAK_MODE_COLORJITTER:
 261            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>randomize colors</b>."), sel_message);
 262            event_context->cursor_shape = cursor_color_xpm;
 263            break;
 264        case TWEAK_MODE_BLUR:
 265            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>increase blur</b>; with Shift to <b>decrease</b>."), sel_message);
 266            event_context->cursor_shape = cursor_color_xpm;
 267            break;
 268    }
 269    sp_event_context_update_cursor(event_context);
 270    g_free(sel_message);
 271 }
 272
 273 static bool
 274 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 275 {
 276     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 277         // we cannot store properties with uris
 278         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 279         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 280         prefs->setStyle("/tools/tweak/style", const_cast<SPCSSAttr*>(css));
 281         return true;
 282     }
 283     return false;
 284 }
 285
 286
 287 static void
 288 sp_tweak_context_setup(SPEventContext *ec)
 289 {
 290     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 291
 292     if (((SPEventContextClass *) parent_class)->setup)
 293         ((SPEventContextClass *) parent_class)->setup(ec);
 294
 295     {
 296         /* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */
 297         SPCurve *c = new SPCurve();
 298         const double C1 = 0.552;
 299         c->moveto(-1,0);
 300         c->curveto(-1, C1, -C1, 1, 0, 1 );
 301         c->curveto(C1, 1, 1, C1, 1, 0 );
 302         c->curveto(1, -C1, C1, -1, 0, -1 );
 303         c->curveto(-C1, -1, -1, -C1, -1, 0 );
 304         c->closepath();
 305         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 306         c->unref();
 307         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 308         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 309         sp_canvas_item_hide(tc->dilate_area);
 310     }
 311
 312     tc->is_drawing = false;
 313
 314     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 315
 316     sp_event_context_read(ec, "width");
 317     sp_event_context_read(ec, "mode");
 318     sp_event_context_read(ec, "fidelity");
 319     sp_event_context_read(ec, "force");
 320     sp_event_context_read(ec, "usepressure");
 321     sp_event_context_read(ec, "doh");
 322     sp_event_context_read(ec, "dol");
 323     sp_event_context_read(ec, "dos");
 324     sp_event_context_read(ec, "doo");
 325
 326     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 327         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 328     );
 329
 330     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 331     if (prefs->getBool("/tools/tweak/selcue")) {
 332         ec->enableSelectionCue();
 333     }
 334
 335     if (prefs->getBool("/tools/tweak/gradientdrag")) {
 336         ec->enableGrDrag();
 337     }
 338 }
 339
 340 static void
 341 sp_tweak_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val)
 342 {
 343     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 344     Glib::ustring path = val->getEntryName();
 345
 346     if (path == "width") {
 347         tc->width = CLAMP(val->getDouble(0.1), -1000.0, 1000.0);
 348     } else if (path == "mode") {
 349         tc->mode = val->getInt();
 350         sp_tweak_update_cursor(tc, false);
 351     } else if (path == "fidelity") {
 352         tc->fidelity = CLAMP(val->getDouble(), 0.0, 1.0);
 353     } else if (path == "force") {
 354         tc->force = CLAMP(val->getDouble(1.0), 0, 1.0);
 355     } else if (path == "usepressure") {
 356         tc->usepressure = val->getBool();
 357     } else if (path == "doh") {
 358         tc->do_h = val->getBool();
 359     } else if (path == "dos") {
 360         tc->do_s = val->getBool();
 361     } else if (path == "dol") {
 362         tc->do_l = val->getBool();
 363     } else if (path == "doo") {
 364         tc->do_o = val->getBool();
 365     }
 366 }
 367
 368 static void
 369 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 370 {
 371     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 372         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 373     else
 374         tc->pressure = TC_DEFAULT_PRESSURE;
 375 }
 376
 377 double
 378 get_dilate_radius (SPTweakContext *tc)
 379 {
 380     // 10 times the pen width:
 381     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 382 }
 383
 384 double
 385 get_path_force (SPTweakContext *tc)
 386 {
 387     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 388         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 389     if (force > 3) {
 390         force += 4 * (force - 3);
 391     }
 392     return force * tc->force;
 393 }
 394
 395 double
 396 get_move_force (SPTweakContext *tc)
 397 {
 398     double force = (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE);
 399     return force * tc->force;
 400 }
 401
 402 bool
 403 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, Geom::Point p, Geom::Point vector, gint mode, double radius, double force, double fidelity, bool reverse)
 404 {
 405     bool did = false;
 406
 407     if (SP_IS_BOX3D(item) && !is_transform_mode(mode) && !is_color_mode(mode)) {
 408         // convert 3D boxes to ordinary groups before tweaking their shapes
 409         item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));
 410         selection->add(item);
 411     }
 412
 413     if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 414         GSList *items = g_slist_prepend (NULL, item);
 415         GSList *selected = NULL;
 416         GSList *to_select = NULL;
 417         SPDocument *doc = SP_OBJECT_DOCUMENT(item);
 418         sp_item_list_to_curves (items, &selected, &to_select);
 419         g_slist_free (items);
 420         SPObject* newObj = doc->getObjectByRepr((Inkscape::XML::Node *) to_select->data);
 421         g_slist_free (to_select);
 422         item = (SPItem *) newObj;
 423         selection->add(item);
 424     }
 425
 426     if (SP_IS_GROUP(item) && !SP_IS_BOX3D(item)) {
 427         GSList *children = NULL;
 428         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 429             if (SP_IS_ITEM(child)) {
 430                 children = g_slist_prepend(children, child);
 431             }
 432         }
 433
 434         for (GSList *i = children; i; i = i->next) {
 435             SPItem *child = SP_ITEM(i->data);
 436             if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity, reverse))
 437                 did = true;
 438         }
 439
 440         g_slist_free(children);
 441
 442     } else {
 443         if (mode == TWEAK_MODE_MOVE) {
 444
 445             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 446             if (a) {
 447                 double x = Geom::L2(a->midpoint() - p)/radius;
 448                 if (a->contains(p)) x = 0;
 449                 if (x < 1) {
 450                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) * vector;
 451                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], move[Geom::Y]));
 452                     did = true;
 453                 }
 454             }
 455
 456         } else if (mode == TWEAK_MODE_MOVE_IN_OUT) {
 457
 458             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 459             if (a) {
 460                 double x = Geom::L2(a->midpoint() - p)/radius;
 461                 if (a->contains(p)) x = 0;
 462                 if (x < 1) {
 463                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) *
 464                         (reverse? (a->midpoint() - p) : (p - a->midpoint()));
 465                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], move[Geom::Y]));
 466                     did = true;
 467                 }
 468             }
 469
 470         } else if (mode == TWEAK_MODE_MOVE_JITTER) {
 471
 472             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 473             if (a) {
 474                 double dp = g_random_double_range(0, M_PI*2);
 475                 double dr = g_random_double_range(0, radius);
 476                 double x = Geom::L2(a->midpoint() - p)/radius;
 477                 if (a->contains(p)) x = 0;
 478                 if (x < 1) {
 479                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) * Geom::Point(cos(dp)*dr, sin(dp)*dr);
 480                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], move[Geom::Y]));
 481                     did = true;
 482                 }
 483             }
 484
 485         } else if (mode == TWEAK_MODE_SCALE) {
 486
 487             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 488             if (a) {
 489                 double x = Geom::L2(a->midpoint() - p)/radius;
 490                 if (a->contains(p)) x = 0;
 491                 if (x < 1) {
 492                     double scale = 1 + (reverse? force : -force) * 0.05 * (cos(M_PI * x) + 1);
 493                     sp_item_scale_rel(item, Geom::Scale(scale, scale));
 494                     did = true;
 495                 }
 496             }
 497
 498         } else if (mode == TWEAK_MODE_ROTATE) {
 499
 500             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 501             if (a) {
 502                 double x = Geom::L2(a->midpoint() - p)/radius;
 503                 if (a->contains(p)) x = 0;
 504                 if (x < 1) {
 505                     double angle = (reverse? -force : force) * 0.05 * (cos(M_PI * x) + 1) * M_PI;
 506                     sp_item_rotate_rel(item, Geom::Rotate(angle));
 507                     did = true;
 508                 }
 509             }
 510
 511         } else if (mode == TWEAK_MODE_MORELESS) {
 512
 513             Geom::OptRect a = item->getBounds(sp_item_i2doc_affine(item));
 514             if (a) {
 515                 double x = Geom::L2(a->midpoint() - p)/radius;
 516                 if (a->contains(p)) x = 0;
 517                 if (x < 1) {
 518                     double prob = force * 0.5 * (cos(M_PI * x) + 1);
 519                     double chance = g_random_double_range(0, 1);
 520                     if (chance <= prob) {
 521                         if (reverse) { // delete
 522                             sp_object_ref(SP_OBJECT(item), NULL);
 523                             SP_OBJECT(item)->deleteObject(true, true);
 524                             sp_object_unref(SP_OBJECT(item), NULL);
 525                         } else { // duplicate
 526                             SPDocument *doc = SP_OBJECT_DOCUMENT(item);
 527                             Inkscape::XML::Document* xml_doc = sp_document_repr_doc(doc);
 528                             Inkscape::XML::Node *old_repr = SP_OBJECT_REPR(item);
 529                             SPObject *old_obj = doc->getObjectByRepr(old_repr);
 530                             Inkscape::XML::Node *parent = old_repr->parent();
 531                             Inkscape::XML::Node *copy = old_repr->duplicate(xml_doc);
 532                             parent->appendChild(copy);
 533                             SPObject *new_obj = doc->getObjectByRepr(copy);
 534                             if (selection->includes(old_obj)) {
 535                                 selection->add(new_obj);
 536                             }
 537                             Inkscape::GC::release(copy);
 538                         }
 539                         did = true;
 540                     }
 541                 }
 542             }
 543
 544         } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item)) {
 545
 546         Inkscape::XML::Node *newrepr = NULL;
 547         gint pos = 0;
 548         Inkscape::XML::Node *parent = NULL;
 549         char const *id = NULL;
 550         if (!SP_IS_PATH(item)) {
 551             newrepr = sp_selected_item_to_curved_repr(item, 0);
 552             if (!newrepr)
 553                 return false;
 554
 555             // remember the position of the item
 556             pos = SP_OBJECT_REPR(item)->position();
 557             // remember parent
 558             parent = SP_OBJECT_REPR(item)->parent();
 559             // remember id
 560             id = SP_OBJECT_REPR(item)->attribute("id");
 561         }
 562
 563
 564         // skip those paths whose bboxes are entirely out of reach with our radius
 565         Geom::OptRect bbox = item->getBounds(sp_item_i2doc_affine(item));
 566         if (bbox) {
 567             bbox->expandBy(radius);
 568             if (!bbox->contains(p)) {
 569                 return false;
 570             }
 571         }
 572
 573         Path *orig = Path_for_item(item, false);
 574         if (orig == NULL) {
 575             return false;
 576         }
 577
 578         Path *res = new Path;
 579         res->SetBackData(false);
 580
 581         Shape *theShape = new Shape;
 582         Shape *theRes = new Shape;
 583         Geom::Matrix i2doc(sp_item_i2doc_affine(item));
 584
 585         orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / i2doc.descrim()); // default 0.059
 586         orig->Fill(theShape, 0);
 587
 588         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 589         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 590         if (val && strcmp(val, "nonzero") == 0)
 591         {
 592             theRes->ConvertToShape(theShape, fill_nonZero);
 593         }
 594         else if (val && strcmp(val, "evenodd") == 0)
 595         {
 596             theRes->ConvertToShape(theShape, fill_oddEven);
 597         }
 598         else
 599         {
 600             theRes->ConvertToShape(theShape, fill_nonZero);
 601         }
 602
 603         if (Geom::L2(vector) != 0)
 604             vector = 1/Geom::L2(vector) * vector;
 605
 606         bool did_this = false;
 607         if (mode == TWEAK_MODE_SHRINK_GROW) {
 608             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 609                                  reverse? force : -force,
 610                                  join_straight, 4.0,
 611                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 612               did_this = true;
 613         } else if (mode == TWEAK_MODE_ATTRACT_REPEL) {
 614             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 615                                  reverse? force : -force,
 616                                  join_straight, 4.0,
 617                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0)
 618               did_this = true;
 619         } else if (mode == TWEAK_MODE_PUSH) {
 620             if (theShape->MakeTweak(tweak_mode_push, theRes,
 621                                  1.0,
 622                                  join_straight, 4.0,
 623                                  true, p, force*2*vector, radius, &i2doc) == 0)
 624               did_this = true;
 625         } else if (mode == TWEAK_MODE_ROUGHEN) {
 626             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 627                                  force,
 628                                  join_straight, 4.0,
 629                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0)
 630               did_this = true;
 631         }
 632
 633         // the rest only makes sense if we actually changed the path
 634         if (did_this) {
 635             theRes->ConvertToShape(theShape, fill_positive);
 636
 637             res->Reset();
 638             theRes->ConvertToForme(res);
 639
 640             double th_max = (0.6 - 0.59*sqrt(fidelity)) / i2doc.descrim();
 641             double threshold = MAX(th_max, th_max*force);
 642             res->ConvertEvenLines(threshold);
 643             res->Simplify(threshold / (selection->desktop()->current_zoom()));
 644
 645             if (newrepr) { // converting to path, need to replace the repr
 646                 bool is_selected = selection->includes(item);
 647                 if (is_selected)
 648                     selection->remove(item);
 649
 650                 // It's going to resurrect, so we delete without notifying listeners.
 651                 SP_OBJECT(item)->deleteObject(false);
 652
 653                 // restore id
 654                 newrepr->setAttribute("id", id);
 655                 // add the new repr to the parent
 656                 parent->appendChild(newrepr);
 657                 // move to the saved position
 658                 newrepr->setPosition(pos > 0 ? pos : 0);
 659
 660                 if (is_selected)
 661                     selection->add(newrepr);
 662             }
 663
 664             if (res->descr_cmd.size() > 1) {
 665                 gchar *str = res->svg_dump_path();
 666                 if (newrepr) {
 667                     newrepr->setAttribute("d", str);
 668                 } else {
 669                     if (SP_IS_LPE_ITEM(item) && sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(item))) {
 670                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 671                     } else {
 672                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 673                     }
 674                 }
 675                 g_free(str);
 676             } else {
 677                 // TODO: if there's 0 or 1 node left, delete this path altogether
 678             }
 679
 680             if (newrepr) {
 681                 Inkscape::GC::release(newrepr);
 682                 newrepr = NULL;
 683             }
 684         }
 685
 686         delete theShape;
 687         delete theRes;
 688         delete orig;
 689         delete res;
 690
 691         if (did_this)
 692             did = true;
 693     }
 694
 695     }
 696
 697     return did;
 698 }
 699
 700 void
 701 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 702 {
 703     float rgb_g[3];
 704
 705     if (!do_h || !do_s || !do_l) {
 706         float hsl_g[3];
 707         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 708         float hsl_c[3];
 709         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 710         if (!do_h)
 711             hsl_g[0] = hsl_c[0];
 712         if (!do_s)
 713             hsl_g[1] = hsl_c[1];
 714         if (!do_l)
 715             hsl_g[2] = hsl_c[2];
 716         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 717     } else {
 718         rgb_g[0] = SP_RGBA32_R_F(goal);
 719         rgb_g[1] = SP_RGBA32_G_F(goal);
 720         rgb_g[2] = SP_RGBA32_B_F(goal);
 721     }
 722
 723     for (int i = 0; i < 3; i++) {
 724         double d = rgb_g[i] - color[i];
 725         color[i] += d * force;
 726     }
 727 }
 728
 729 void
 730 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 731 {
 732     float hsl_c[3];
 733     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 734
 735     if (do_h) {
 736         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 737         if (hsl_c[0] > 1)
 738             hsl_c[0] -= 1;
 739         if (hsl_c[0] < 0)
 740             hsl_c[0] += 1;
 741     }
 742     if (do_s) {
 743         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 744     }
 745     if (do_l) {
 746         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 747     }
 748
 749     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 750 }
 751
 752 void
 753 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 754 {
 755     if (mode == TWEAK_MODE_COLORPAINT) {
 756         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 757     } else if (mode == TWEAK_MODE_COLORJITTER) {
 758         tweak_colorjitter (color, force, do_h, do_s, do_l);
 759     }
 760 }
 761
 762 void
 763 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 764 {
 765     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 766
 767     if (mode == TWEAK_MODE_COLORPAINT) {
 768         double d = opacity_goal - opacity;
 769         opacity += d * force;
 770     } else if (mode == TWEAK_MODE_COLORJITTER) {
 771         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 772     }
 773
 774     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 775 }
 776
 777
 778 double
 779 tweak_profile (double dist, double radius)
 780 {
 781     if (radius == 0)
 782         return 0;
 783     double x = dist / radius;
 784     double alpha = 1;
 785     if (x >= 1) {
 786         return 0;
 787     } else if (x <= 0) {
 788         return 1;
 789     } else {
 790         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 791     }
 792 }
 793
 794 void
 795 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 796                           guint32 const rgb_goal, Geom::Point p_w, double radius, double force, guint mode,
 797                           bool do_h, bool do_s, bool do_l, bool /*do_o*/)
 798 {
 799     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 800
 801     if (!gradient || !SP_IS_GRADIENT(gradient))
 802         return;
 803
 804     Geom::Matrix i2d (sp_item_i2doc_affine (item));
 805     Geom::Point p = p_w * i2d.inverse();
 806     p *= (gradient->gradientTransform).inverse();
 807     // now p is in gradient's original coordinates
 808
 809     double pos = 0;
 810     double r = 0;
 811     if (SP_IS_LINEARGRADIENT(gradient)) {
 812         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 813
 814         Geom::Point p1(lg->x1.computed, lg->y1.computed);
 815         Geom::Point p2(lg->x2.computed, lg->y2.computed);
 816         Geom::Point pdiff(p2 - p1);
 817         double vl = Geom::L2(pdiff);
 818
 819         // This is the matrix which moves and rotates the gradient line
 820         // so it's oriented along the X axis:
 821         Geom::Matrix norm = Geom::Matrix(Geom::Translate(-p1)) * Geom::Matrix(Geom::Rotate(-atan2(pdiff[Geom::Y], pdiff[Geom::X])));
 822
 823         // Transform the mouse point by it to find out its projection onto the gradient line:
 824         Geom::Point pnorm = p * norm;
 825
 826         // Scale its X coordinate to match the length of the gradient line:
 827         pos = pnorm[Geom::X] / vl;
 828         // Calculate radius in lenfth-of-gradient-line units
 829         r = radius / vl;
 830
 831     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 832         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 833         Geom::Point c (rg->cx.computed, rg->cy.computed);
 834         pos = Geom::L2(p - c) / rg->r.computed;
 835         r = radius / rg->r.computed;
 836     }
 837
 838     // Normalize pos to 0..1, taking into accound gradient spread:
 839     double pos_e = pos;
 840     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 841         if (pos > 1)
 842             pos_e = 1;
 843         if (pos < 0)
 844             pos_e = 0;
 845     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 846         if (pos > 1 || pos < 0)
 847             pos_e = pos - floor(pos);
 848     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 849         if (pos > 1 || pos < 0) {
 850             bool odd = ((int)(floor(pos)) % 2 == 1);
 851             pos_e = pos - floor(pos);
 852             if (odd)
 853                 pos_e = 1 - pos_e;
 854         }
 855     }
 856
 857     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 858
 859     double offset_l = 0;
 860     double offset_h = 0;
 861     SPObject *child_prev = NULL;
 862     for (SPObject *child = sp_object_first_child(vector);
 863          child != NULL; child = SP_OBJECT_NEXT(child)) {
 864         if (!SP_IS_STOP(child))
 865             continue;
 866         SPStop *stop = SP_STOP (child);
 867
 868         offset_h = stop->offset;
 869
 870         if (child_prev) {
 871
 872             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 873                 // the summit falls in this interstop, and the radius is small,
 874                 // so it only affects the ends of this interstop;
 875                 // distribute the force between the two endstops so that they
 876                 // get all the painting even if they are not touched by the brush
 877                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 878                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 879                                   do_h, do_s, do_l);
 880                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 881                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 882                                   do_h, do_s, do_l);
 883                 SP_OBJECT(stop)->updateRepr();
 884                 child_prev->updateRepr();
 885                 break;
 886             } else {
 887                 // wide brush, may affect more than 2 stops,
 888                 // paint each stop by the force from the profile curve
 889                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 890                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 891                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 892                                  do_h, do_s, do_l);
 893                     child_prev->updateRepr();
 894                 }
 895
 896                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 897                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 898                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 899                                  do_h, do_s, do_l);
 900                     SP_OBJECT(stop)->updateRepr();
 901                 }
 902             }
 903         }
 904
 905         offset_l = offset_h;
 906         child_prev = child;
 907     }
 908 }
 909
 910 bool
 911 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 912                           guint32 fill_goal, bool do_fill,
 913                           guint32 stroke_goal, bool do_stroke,
 914                           float opacity_goal, bool do_opacity,
 915                           bool do_blur, bool reverse,
 916                           Geom::Point p, double radius, double force,
 917                           bool do_h, bool do_s, bool do_l, bool do_o)
 918 {
 919     bool did = false;
 920
 921     if (SP_IS_GROUP(item)) {
 922         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 923             if (SP_IS_ITEM(child)) {
 924                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 925                                           fill_goal, do_fill,
 926                                           stroke_goal, do_stroke,
 927                                           opacity_goal, do_opacity,
 928                                           do_blur, reverse,
 929                                           p, radius, force, do_h, do_s, do_l, do_o))
 930                     did = true;
 931             }
 932         }
 933
 934     } else {
 935         SPStyle *style = SP_OBJECT_STYLE(item);
 936         if (!style) {
 937             return false;
 938         }
 939         Geom::OptRect bbox = item->getBounds(sp_item_i2doc_affine(item),
 940                                                         SPItem::GEOMETRIC_BBOX);
 941         if (!bbox) {
 942             return false;
 943         }
 944
 945         Geom::Rect brush(p - Geom::Point(radius, radius), p + Geom::Point(radius, radius));
 946
 947         Geom::Point center = bbox->midpoint();
 948         double this_force;
 949
 950 // if item == item_at_point, use max force
 951         if (item == item_at_point) {
 952             this_force = force;
 953 // else if no overlap of bbox and brush box, skip:
 954         } else if (!bbox->intersects(brush)) {
 955             return false;
 956 //TODO:
 957 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 958         //} else if (bbox->maxExtent() > 3 * radius) {
 959         //}
 960 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 961 // else if still smaller, then check only the object center:
 962         } else {
 963             this_force = force * tweak_profile (Geom::L2 (p - center), radius);
 964         }
 965
 966         if (this_force > 0.002) {
 967
 968             if (do_blur) {
 969                 Geom::OptRect bbox = item->getBounds(sp_item_i2doc_affine(item),
 970                                                         SPItem::GEOMETRIC_BBOX);
 971                 if (!bbox) {
 972                     return did;
 973                 }
 974
 975                 double blur_now = 0;
 976                 Geom::Matrix i2d = sp_item_i2d_affine (item);
 977                 if (style->filter.set && style->getFilter()) {
 978                     //cycle through filter primitives
 979                     SPObject *primitive_obj = style->getFilter()->children;
 980                     while (primitive_obj) {
 981                         if (SP_IS_FILTER_PRIMITIVE(primitive_obj)) {
 982                             SPFilterPrimitive *primitive = SP_FILTER_PRIMITIVE(primitive_obj);
 983                             //if primitive is gaussianblur
 984                             if(SP_IS_GAUSSIANBLUR(primitive)) {
 985                                 SPGaussianBlur * spblur = SP_GAUSSIANBLUR(primitive);
 986                                 float num = spblur->stdDeviation.getNumber();
 987                                 blur_now += num * i2d.descrim(); // sum all blurs in the filter
 988                             }
 989                         }
 990                         primitive_obj = primitive_obj->next;
 991                     }
 992                 }
 993                 double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];
 994                 blur_now = blur_now / perimeter;
 995
 996                 double blur_new;
 997                 if (reverse)
 998                     blur_new = blur_now - 0.06 * force;
 999                 else
1000                     blur_new = blur_now + 0.06 * force;
1001                 if (blur_new < 0.0005 && blur_new < blur_now) {
1002                     blur_new = 0;
1003                 }
1004
1005                 if (blur_new == 0) {
1006                     remove_filter(item, false);
1007                 } else {
1008                     double radius = blur_new * perimeter;
1009                     SPFilter *filter = modify_filter_gaussian_blur_from_item(SP_OBJECT_DOCUMENT(item), item, radius);
1010
1011                     sp_style_set_property_url(item, "filter", filter, false);
1012                 }
1013                 return true; // do not do colors, blur is a separate mode
1014             }
1015
1016             if (do_fill) {
1017                 if (style->fill.isPaintserver()) {
1018                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
1019                     did = true;
1020                 } else if (style->fill.isColor()) {
1021                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
1022                     item->updateRepr();
1023                     did = true;
1024                 }
1025             }
1026             if (do_stroke) {
1027                 if (style->stroke.isPaintserver()) {
1028                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
1029                     did = true;
1030                 } else if (style->stroke.isColor()) {
1031                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
1032                     item->updateRepr();
1033                     did = true;
1034                 }
1035             }
1036             if (do_opacity && do_o) {
1037                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
1038             }
1039         }
1040     }
1041
1042     return did;
1043 }
1044
1045
1046 bool
1047 sp_tweak_dilate (SPTweakContext *tc, Geom::Point event_p, Geom::Point p, Geom::Point vector, bool reverse)
1048 {
1049     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
1050     SPDesktop *desktop = SP_EVENT_CONTEXT(tc)->desktop;
1051
1052     if (selection->isEmpty()) {
1053         return false;
1054     }
1055
1056     bool did = false;
1057     double radius = get_dilate_radius(tc);
1058
1059     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
1060
1061     bool do_fill = false, do_stroke = false, do_opacity = false;
1062     guint32 fill_goal = sp_desktop_get_color_tool(desktop, "/tools/tweak", true, &do_fill);
1063     guint32 stroke_goal = sp_desktop_get_color_tool(desktop, "/tools/tweak", false, &do_stroke);
1064     double opacity_goal = sp_desktop_get_master_opacity_tool(desktop, "/tools/tweak", &do_opacity);
1065     if (reverse) {
1066 #if 0
1067         // HSL inversion
1068         float hsv[3];
1069         float rgb[3];
1070         sp_color_rgb_to_hsv_floatv (hsv,
1071                                     SP_RGBA32_R_F(fill_goal),
1072                                     SP_RGBA32_G_F(fill_goal),
1073                                     SP_RGBA32_B_F(fill_goal));
1074         sp_color_hsv_to_rgb_floatv (rgb, hsv[0]<.5? hsv[0]+.5 : hsv[0]-.5, 1 - hsv[1], 1 - hsv[2]);
1075         fill_goal = SP_RGBA32_F_COMPOSE(rgb[0], rgb[1], rgb[2], 1);
1076         sp_color_rgb_to_hsv_floatv (hsv,
1077                                     SP_RGBA32_R_F(stroke_goal),
1078                                     SP_RGBA32_G_F(stroke_goal),
1079                                     SP_RGBA32_B_F(stroke_goal));
1080         sp_color_hsv_to_rgb_floatv (rgb, hsv[0]<.5? hsv[0]+.5 : hsv[0]-.5, 1 - hsv[1], 1 - hsv[2]);
1081         stroke_goal = SP_RGBA32_F_COMPOSE(rgb[0], rgb[1], rgb[2], 1);
1082 #else
1083         // RGB inversion
1084         fill_goal = SP_RGBA32_U_COMPOSE(
1085             (255 - SP_RGBA32_R_U(fill_goal)),
1086             (255 - SP_RGBA32_G_U(fill_goal)),
1087             (255 - SP_RGBA32_B_U(fill_goal)),
1088             (255 - SP_RGBA32_A_U(fill_goal)));
1089         stroke_goal = SP_RGBA32_U_COMPOSE(
1090             (255 - SP_RGBA32_R_U(stroke_goal)),
1091             (255 - SP_RGBA32_G_U(stroke_goal)),
1092             (255 - SP_RGBA32_B_U(stroke_goal)),
1093             (255 - SP_RGBA32_A_U(stroke_goal)));
1094 #endif
1095         opacity_goal = 1 - opacity_goal;
1096     }
1097
1098     double path_force = get_path_force(tc);
1099     if (radius == 0 || path_force == 0) {
1100         return false;
1101     }
1102     double move_force = get_move_force(tc);
1103     double color_force = MIN(sqrt(path_force)/20.0, 1);
1104
1105     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1106          items != NULL;
1107          items = items->next) {
1108
1109         SPItem *item = (SPItem *) items->data;
1110
1111         if (is_color_mode (tc->mode)) {
1112             if (do_fill || do_stroke || do_opacity) {
1113                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
1114                                           fill_goal, do_fill,
1115                                           stroke_goal, do_stroke,
1116                                           opacity_goal, do_opacity,
1117                                           tc->mode == TWEAK_MODE_BLUR, reverse,
1118                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
1119                 did = true;
1120             }
1121         } else if (is_transform_mode(tc->mode)) {
1122             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, move_force, tc->fidelity, reverse))
1123                 did = true;
1124         } else {
1125             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, path_force, tc->fidelity, reverse))
1126                 did = true;
1127         }
1128     }
1129
1130     return did;
1131 }
1132
1133 void
1134 sp_tweak_update_area (SPTweakContext *tc)
1135 {
1136         double radius = get_dilate_radius(tc);
1137         Geom::Matrix const sm (Geom::Scale(radius, radius) * Geom::Translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
1138         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
1139         sp_canvas_item_show(tc->dilate_area);
1140 }
1141
1142 void
1143 sp_tweak_switch_mode (SPTweakContext *tc, gint mode, bool with_shift)
1144 {
1145     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
1146     // need to set explicitly, because the prefs may not have changed by the previous
1147     tc->mode = mode;
1148     sp_tweak_update_cursor (tc, with_shift);
1149 }
1150
1151 void
1152 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode, bool with_shift)
1153 {
1154     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1155    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
1156    gint now_mode = prefs->getInt("/tools/tweak/mode", 0);
1157    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
1158    // button has changed prefs, restore
1159    prefs->setInt("/tools/tweak/mode", now_mode);
1160    // changing prefs changed tc->mode, restore back :)
1161    tc->mode = mode;
1162    sp_tweak_update_cursor (tc, with_shift);
1163 }
1164
1165 gint
1166 sp_tweak_context_root_handler(SPEventContext *event_context,
1167                                   GdkEvent *event)
1168 {
1169     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
1170     SPDesktop *desktop = event_context->desktop;
1171
1172     gint ret = FALSE;
1173
1174     switch (event->type) {
1175         case GDK_ENTER_NOTIFY:
1176             sp_canvas_item_show(tc->dilate_area);
1177             break;
1178         case GDK_LEAVE_NOTIFY:
1179             sp_canvas_item_hide(tc->dilate_area);
1180             break;
1181         case GDK_BUTTON_PRESS:
1182             if (event->button.button == 1 && !event_context->space_panning) {
1183
1184                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
1185                     return TRUE;
1186                 }
1187
1188                 Geom::Point const button_w(event->button.x,
1189                                          event->button.y);
1190                 Geom::Point const button_dt(desktop->w2d(button_w));
1191                 tc->last_push = desktop->dt2doc(button_dt);
1192
1193                 sp_tweak_extinput(tc, event);
1194
1195                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
1196                 tc->is_drawing = true;
1197                 tc->is_dilating = true;
1198                 tc->has_dilated = false;
1199
1200                 ret = TRUE;
1201             }
1202             break;
1203         case GDK_MOTION_NOTIFY:
1204         {
1205             Geom::Point const motion_w(event->motion.x,
1206                                      event->motion.y);
1207             Geom::Point motion_dt(desktop->w2d(motion_w));
1208             Geom::Point motion_doc(desktop->dt2doc(motion_dt));
1209             sp_tweak_extinput(tc, event);
1210
1211             // draw the dilating cursor
1212                 double radius = get_dilate_radius(tc);
1213                 Geom::Matrix const sm (Geom::Scale(radius, radius) * Geom::Translate(desktop->w2d(motion_w)));
1214                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
1215                 sp_canvas_item_show(tc->dilate_area);
1216
1217                 guint num = 0;
1218                 if (!desktop->selection->isEmpty()) {
1219                     num = g_slist_length((GSList *) desktop->selection->itemList());
1220                 }
1221                 if (num == 0) {
1222                     tc->_message_context->flash(Inkscape::ERROR_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
1223                 }
1224
1225             // dilating:
1226             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
1227                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push, event->button.state & GDK_SHIFT_MASK? true : false);
1228                 //tc->last_push = motion_doc;
1229                 tc->has_dilated = true;
1230                 // it's slow, so prevent clogging up with events
1231                 gobble_motion_events(GDK_BUTTON1_MASK);
1232                 return TRUE;
1233             }
1234
1235         }
1236         break;
1237
1238
1239     case GDK_BUTTON_RELEASE:
1240     {
1241         Geom::Point const motion_w(event->button.x, event->button.y);
1242         Geom::Point const motion_dt(desktop->w2d(motion_w));
1243
1244         sp_canvas_end_forced_full_redraws(desktop->canvas);
1245         tc->is_drawing = false;
1246
1247         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1248             if (!tc->has_dilated) {
1249                 // if we did not rub, do a light tap
1250                 tc->pressure = 0.03;
1251                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), Geom::Point(0,0), MOD__SHIFT);
1252             }
1253             tc->is_dilating = false;
1254             tc->has_dilated = false;
1255             switch (tc->mode) {
1256                 case TWEAK_MODE_MOVE:
1257                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1258                                      SP_VERB_CONTEXT_TWEAK, _("Move tweak"));
1259                     break;
1260                 case TWEAK_MODE_MOVE_IN_OUT:
1261                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1262                                      SP_VERB_CONTEXT_TWEAK, _("Move in/out tweak"));
1263                     break;
1264                 case TWEAK_MODE_MOVE_JITTER:
1265                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1266                                      SP_VERB_CONTEXT_TWEAK, _("Move jitter tweak"));
1267                     break;
1268                 case TWEAK_MODE_SCALE:
1269                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1270                                      SP_VERB_CONTEXT_TWEAK, _("Scale tweak"));
1271                     break;
1272                 case TWEAK_MODE_ROTATE:
1273                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1274                                      SP_VERB_CONTEXT_TWEAK, _("Rotate tweak"));
1275                     break;
1276                 case TWEAK_MODE_MORELESS:
1277                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1278                                      SP_VERB_CONTEXT_TWEAK, _("Duplicate/delete tweak"));
1279                     break;
1280                 case TWEAK_MODE_PUSH:
1281                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1282                                      SP_VERB_CONTEXT_TWEAK, _("Push path tweak"));
1283                     break;
1284                 case TWEAK_MODE_SHRINK_GROW:
1285                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1286                                      SP_VERB_CONTEXT_TWEAK, _("Shrink/grow path tweak"));
1287                     break;
1288                 case TWEAK_MODE_ATTRACT_REPEL:
1289                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1290                                      SP_VERB_CONTEXT_TWEAK, _("Attract/repel path tweak"));
1291                     break;
1292                 case TWEAK_MODE_ROUGHEN:
1293                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1294                                      SP_VERB_CONTEXT_TWEAK, _("Roughen path tweak"));
1295                     break;
1296                 case TWEAK_MODE_COLORPAINT:
1297                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1298                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1299                     break;
1300                 case TWEAK_MODE_COLORJITTER:
1301                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1302                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1303                     break;
1304                 case TWEAK_MODE_BLUR:
1305                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1306                                      SP_VERB_CONTEXT_TWEAK, _("Blur tweak"));
1307                     break;
1308             }
1309         }
1310         break;
1311     }
1312
1313     case GDK_KEY_PRESS:
1314         switch (get_group0_keyval (&event->key)) {
1315         case GDK_m:
1316         case GDK_M:
1317         case GDK_0:
1318             if (MOD__SHIFT_ONLY) {
1319                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE, MOD__SHIFT);
1320                 ret = TRUE;
1321             }
1322             break;
1323         case GDK_i:
1324         case GDK_I:
1325         case GDK_1:
1326             if (MOD__SHIFT_ONLY) {
1327                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE_IN_OUT, MOD__SHIFT);
1328                 ret = TRUE;
1329             }
1330             break;
1331         case GDK_z:
1332         case GDK_Z:
1333         case GDK_2:
1334             if (MOD__SHIFT_ONLY) {
1335                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE_JITTER, MOD__SHIFT);
1336                 ret = TRUE;
1337             }
1338             break;
1339         case GDK_less:
1340         case GDK_comma:
1341         case GDK_greater:
1342         case GDK_period:
1343         case GDK_3:
1344             if (MOD__SHIFT_ONLY) {
1345                 sp_tweak_switch_mode(tc, TWEAK_MODE_SCALE, MOD__SHIFT);
1346                 ret = TRUE;
1347             }
1348             break;
1349         case GDK_bracketright:
1350         case GDK_bracketleft:
1351         case GDK_4:
1352             if (MOD__SHIFT_ONLY) {
1353                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROTATE, MOD__SHIFT);
1354                 ret = TRUE;
1355             }
1356             break;
1357         case GDK_d:
1358         case GDK_D:
1359         case GDK_5:
1360             if (MOD__SHIFT_ONLY) {
1361                 sp_tweak_switch_mode(tc, TWEAK_MODE_MORELESS, MOD__SHIFT);
1362                 ret = TRUE;
1363             }
1364             break;
1365         case GDK_p:
1366         case GDK_P:
1367         case GDK_6:
1368             if (MOD__SHIFT_ONLY) {
1369                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH, MOD__SHIFT);
1370                 ret = TRUE;
1371             }
1372             break;
1373         case GDK_s:
1374         case GDK_S:
1375         case GDK_7:
1376             if (MOD__SHIFT_ONLY) {
1377                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK_GROW, MOD__SHIFT);
1378                 ret = TRUE;
1379             }
1380             break;
1381         case GDK_a:
1382         case GDK_A:
1383         case GDK_8:
1384             if (MOD__SHIFT_ONLY) {
1385                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT_REPEL, MOD__SHIFT);
1386                 ret = TRUE;
1387             }
1388             break;
1389         case GDK_r:
1390         case GDK_R:
1391         case GDK_9:
1392             if (MOD__SHIFT_ONLY) {
1393                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN, MOD__SHIFT);
1394                 ret = TRUE;
1395             }
1396             break;
1397         case GDK_c:
1398         case GDK_C:
1399             if (MOD__SHIFT_ONLY) {
1400                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT, MOD__SHIFT);
1401                 ret = TRUE;
1402             }
1403             break;
1404         case GDK_j:
1405         case GDK_J:
1406             if (MOD__SHIFT_ONLY) {
1407                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER, MOD__SHIFT);
1408                 ret = TRUE;
1409             }
1410             break;
1411         case GDK_b:
1412         case GDK_B:
1413             if (MOD__SHIFT_ONLY) {
1414                 sp_tweak_switch_mode(tc, TWEAK_MODE_BLUR, MOD__SHIFT);
1415                 ret = TRUE;
1416             }
1417             break;
1418
1419         case GDK_Up:
1420         case GDK_KP_Up:
1421             if (!MOD__CTRL_ONLY) {
1422                 tc->force += 0.05;
1423                 if (tc->force > 1.0)
1424                     tc->force = 1.0;
1425                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1426                 ret = TRUE;
1427             }
1428             break;
1429         case GDK_Down:
1430         case GDK_KP_Down:
1431             if (!MOD__CTRL_ONLY) {
1432                 tc->force -= 0.05;
1433                 if (tc->force < 0.0)
1434                     tc->force = 0.0;
1435                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1436                 ret = TRUE;
1437             }
1438             break;
1439         case GDK_Right:
1440         case GDK_KP_Right:
1441             if (!MOD__CTRL_ONLY) {
1442                 tc->width += 0.01;
1443                 if (tc->width > 1.0)
1444                     tc->width = 1.0;
1445                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1446                 sp_tweak_update_area(tc);
1447                 ret = TRUE;
1448             }
1449             break;
1450         case GDK_Left:
1451         case GDK_KP_Left:
1452             if (!MOD__CTRL_ONLY) {
1453                 tc->width -= 0.01;
1454                 if (tc->width < 0.01)
1455                     tc->width = 0.01;
1456                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1457                 sp_tweak_update_area(tc);
1458                 ret = TRUE;
1459             }
1460             break;
1461         case GDK_Home:
1462         case GDK_KP_Home:
1463             tc->width = 0.01;
1464             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1465             sp_tweak_update_area(tc);
1466             ret = TRUE;
1467             break;
1468         case GDK_End:
1469         case GDK_KP_End:
1470             tc->width = 1.0;
1471             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1472             sp_tweak_update_area(tc);
1473             ret = TRUE;
1474             break;
1475         case GDK_x:
1476         case GDK_X:
1477             if (MOD__ALT_ONLY) {
1478                 desktop->setToolboxFocusTo ("altx-tweak");
1479                 ret = TRUE;
1480             }
1481             break;
1482
1483         case GDK_Shift_L:
1484         case GDK_Shift_R:
1485             sp_tweak_update_cursor(tc, true);
1486             break;
1487
1488         case GDK_Control_L:
1489         case GDK_Control_R:
1490             sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK_GROW, MOD__SHIFT);
1491             break;
1492         default:
1493             break;
1494         }
1495         break;
1496
1497     case GDK_KEY_RELEASE: {
1498         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1499         switch (get_group0_keyval(&event->key)) {
1500             case GDK_Shift_L:
1501             case GDK_Shift_R:
1502                 sp_tweak_update_cursor(tc, false);
1503                 break;
1504             case GDK_Control_L:
1505             case GDK_Control_R:
1506                 sp_tweak_switch_mode (tc, prefs->getInt("/tools/tweak/mode"), MOD__SHIFT);
1507                 tc->_message_context->clear();
1508                 break;
1509             default:
1510                 sp_tweak_switch_mode (tc, prefs->getInt("/tools/tweak/mode"), MOD__SHIFT);
1511                 break;
1512         }
1513     }
1514
1515     default:
1516         break;
1517     }
1518
1519     if (!ret) {
1520         if (((SPEventContextClass *) parent_class)->root_handler) {
1521             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1522         }
1523     }
1524
1525     return ret;
1526 }
1527
1528
1529 /*
1530   Local Variables:
1531   mode:c++
1532   c-file-style:"stroustrup"
1533   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1534   indent-tabs-mode:nil
1535   fill-column:99
1536   End:
1537 */
1538 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :