src/tweak-context.cpp

   1 /*
   2  * tweaking paths without node editing
   3  *
   4  * Authors:
   5  *   bulia byak
   6  *   Jon A. Cruz <jon@joncruz.org>
   7  *   Abhishek Sharma
   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
  24 #include <glib/gmem.h>
  25 #include "macros.h"
  26 #include "document.h"
  27 #include "selection.h"
  28 #include "desktop.h"
  29 #include "desktop-events.h"
  30 #include "desktop-handles.h"
  31 #include "desktop-style.h"
  32 #include "message-context.h"
  33 #include "pixmaps/cursor-tweak-move.xpm"
  34 #include "pixmaps/cursor-thin.xpm"
  35 #include "pixmaps/cursor-thicken.xpm"
  36 #include "pixmaps/cursor-attract.xpm"
  37 #include "pixmaps/cursor-repel.xpm"
  38 #include "pixmaps/cursor-push.xpm"
  39 #include "pixmaps/cursor-roughen.xpm"
  40 #include "pixmaps/cursor-color.xpm"
  41 #include <boost/optional.hpp>
  42 #include "libnr/nr-matrix-ops.h"
  43 #include "libnr/nr-scale-translate-ops.h"
  44 #include "xml/repr.h"
  45 #include "context-fns.h"
  46 #include "sp-item.h"
  47 #include "inkscape.h"
  48 #include "color.h"
  49 #include "svg/svg-color.h"
  50 #include "splivarot.h"
  51 #include "sp-item-group.h"
  52 #include "sp-shape.h"
  53 #include "sp-path.h"
  54 #include "path-chemistry.h"
  55 #include "sp-gradient.h"
  56 #include "sp-stop.h"
  57 #include "sp-gradient-reference.h"
  58 #include "sp-linear-gradient.h"
  59 #include "sp-radial-gradient.h"
  60 #include "gradient-chemistry.h"
  61 #include "sp-text.h"
  62 #include "sp-flowtext.h"
  63 #include "display/sp-canvas.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 using Inkscape::DocumentUndo;
  81
  82 #define DDC_RED_RGBA 0xff0000ff
  83
  84 #define DYNA_MIN_WIDTH 1.0e-6
  85
  86 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  87 static void sp_tweak_context_init(SPTweakContext *ddc);
  88 static void sp_tweak_context_dispose(GObject *object);
  89
  90 static void sp_tweak_context_setup(SPEventContext *ec);
  91 static void sp_tweak_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val);
  92 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
  93
  94 static SPEventContextClass *parent_class;
  95
  96 GtkType
  97 sp_tweak_context_get_type(void)
  98 {
  99     static GType type = 0;
 100     if (!type) {
 101         GTypeInfo info = {
 102             sizeof(SPTweakContextClass),
 103             NULL, NULL,
 104             (GClassInitFunc) sp_tweak_context_class_init,
 105             NULL, NULL,
 106             sizeof(SPTweakContext),
 107             4,
 108             (GInstanceInitFunc) sp_tweak_context_init,
 109             NULL,   /* value_table */
 110         };
 111         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 112     }
 113     return type;
 114 }
 115
 116 static void
 117 sp_tweak_context_class_init(SPTweakContextClass *klass)
 118 {
 119     GObjectClass *object_class = (GObjectClass *) klass;
 120     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 121
 122     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 123
 124     object_class->dispose = sp_tweak_context_dispose;
 125
 126     event_context_class->setup = sp_tweak_context_setup;
 127     event_context_class->set = sp_tweak_context_set;
 128     event_context_class->root_handler = sp_tweak_context_root_handler;
 129 }
 130
 131 static void
 132 sp_tweak_context_init(SPTweakContext *tc)
 133 {
 134     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 135
 136     event_context->cursor_shape = cursor_push_xpm;
 137     event_context->hot_x = 4;
 138     event_context->hot_y = 4;
 139
 140     /* attributes */
 141     tc->dragging = FALSE;
 142
 143     tc->width = 0.2;
 144     tc->force = 0.2;
 145     tc->pressure = TC_DEFAULT_PRESSURE;
 146
 147     tc->is_dilating = false;
 148     tc->has_dilated = false;
 149
 150     tc->do_h = true;
 151     tc->do_s = true;
 152     tc->do_l = true;
 153     tc->do_o = false;
 154
 155     new (&tc->style_set_connection) sigc::connection();
 156 }
 157
 158 static void
 159 sp_tweak_context_dispose(GObject *object)
 160 {
 161     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 162
 163     tc->style_set_connection.disconnect();
 164     tc->style_set_connection.~connection();
 165
 166     if (tc->dilate_area) {
 167         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 168         tc->dilate_area = NULL;
 169     }
 170
 171     if (tc->_message_context) {
 172         delete tc->_message_context;
 173     }
 174
 175     G_OBJECT_CLASS(parent_class)->dispose(object);
 176 }
 177
 178 bool is_transform_mode (gint mode)
 179 {
 180     return (mode == TWEAK_MODE_MOVE ||
 181             mode == TWEAK_MODE_MOVE_IN_OUT ||
 182             mode == TWEAK_MODE_MOVE_JITTER ||
 183             mode == TWEAK_MODE_SCALE ||
 184             mode == TWEAK_MODE_ROTATE ||
 185             mode == TWEAK_MODE_MORELESS);
 186 }
 187
 188 bool is_color_mode (gint mode)
 189 {
 190     return (mode == TWEAK_MODE_COLORPAINT || mode == TWEAK_MODE_COLORJITTER || mode == TWEAK_MODE_BLUR);
 191 }
 192
 193 void
 194 sp_tweak_update_cursor (SPTweakContext *tc, bool with_shift)
 195 {
 196    SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 197    SPDesktop *desktop = event_context->desktop;
 198
 199                 guint num = 0;
 200                 gchar *sel_message = NULL;
 201                 if (!desktop->selection->isEmpty()) {
 202                     num = g_slist_length((GSList *) desktop->selection->itemList());
 203                     sel_message = g_strdup_printf(ngettext("<b>%i</b> object selected","<b>%i</b> objects selected",num), num);
 204                 } else {
 205                     sel_message = g_strdup_printf(_("<b>Nothing</b> selected"));
 206                 }
 207
 208
 209    switch (tc->mode) {
 210        case TWEAK_MODE_MOVE:
 211            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag to <b>move</b>."), sel_message);
 212            event_context->cursor_shape = cursor_tweak_move_xpm;
 213            break;
 214        case TWEAK_MODE_MOVE_IN_OUT:
 215            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);
 216            event_context->cursor_shape = cursor_tweak_move_xpm;
 217            break;
 218        case TWEAK_MODE_MOVE_JITTER:
 219            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>move randomly</b>."), sel_message);
 220            event_context->cursor_shape = cursor_tweak_move_xpm;
 221            break;
 222        case TWEAK_MODE_SCALE:
 223            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);
 224            event_context->cursor_shape = cursor_tweak_move_xpm;
 225            break;
 226        case TWEAK_MODE_ROTATE:
 227            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>rotate clockwise</b>; with Shift, <b>counterclockwise</b>."), sel_message);
 228            event_context->cursor_shape = cursor_tweak_move_xpm;
 229            break;
 230        case TWEAK_MODE_MORELESS:
 231            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>duplicate</b>; with Shift, <b>delete</b>."), sel_message);
 232            event_context->cursor_shape = cursor_tweak_move_xpm;
 233            break;
 234        case TWEAK_MODE_PUSH:
 235            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag to <b>push paths</b>."), sel_message);
 236            event_context->cursor_shape = cursor_push_xpm;
 237            break;
 238        case TWEAK_MODE_SHRINK_GROW:
 239            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>inset paths</b>; with Shift to <b>outset</b>."), sel_message);
 240            if (with_shift) {
 241                event_context->cursor_shape = cursor_thicken_xpm;
 242            } else {
 243                event_context->cursor_shape = cursor_thin_xpm;
 244            }
 245            break;
 246        case TWEAK_MODE_ATTRACT_REPEL:
 247            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>attract paths</b>; with Shift to <b>repel</b>."), sel_message);
 248            if (with_shift) {
 249                event_context->cursor_shape = cursor_repel_xpm;
 250            } else {
 251                event_context->cursor_shape = cursor_attract_xpm;
 252            }
 253            break;
 254        case TWEAK_MODE_ROUGHEN:
 255            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>roughen paths</b>."), sel_message);
 256            event_context->cursor_shape = cursor_roughen_xpm;
 257            break;
 258        case TWEAK_MODE_COLORPAINT:
 259            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>paint objects</b> with color."), sel_message);
 260            event_context->cursor_shape = cursor_color_xpm;
 261            break;
 262        case TWEAK_MODE_COLORJITTER:
 263            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>randomize colors</b>."), sel_message);
 264            event_context->cursor_shape = cursor_color_xpm;
 265            break;
 266        case TWEAK_MODE_BLUR:
 267            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("%s. Drag or click to <b>increase blur</b>; with Shift to <b>decrease</b>."), sel_message);
 268            event_context->cursor_shape = cursor_color_xpm;
 269            break;
 270    }
 271    sp_event_context_update_cursor(event_context);
 272    g_free(sel_message);
 273 }
 274
 275 static bool
 276 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 277 {
 278     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 279         // we cannot store properties with uris
 280         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 281         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 282         prefs->setStyle("/tools/tweak/style", const_cast<SPCSSAttr*>(css));
 283         return true;
 284     }
 285     return false;
 286 }
 287
 288
 289 static void
 290 sp_tweak_context_setup(SPEventContext *ec)
 291 {
 292     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 293
 294     if (((SPEventContextClass *) parent_class)->setup)
 295         ((SPEventContextClass *) parent_class)->setup(ec);
 296
 297     {
 298         /* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */
 299         SPCurve *c = new SPCurve();
 300         const double C1 = 0.552;
 301         c->moveto(-1,0);
 302         c->curveto(-1, C1, -C1, 1, 0, 1 );
 303         c->curveto(C1, 1, 1, C1, 1, 0 );
 304         c->curveto(1, -C1, C1, -1, 0, -1 );
 305         c->curveto(-C1, -1, -1, -C1, -1, 0 );
 306         c->closepath();
 307         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 308         c->unref();
 309         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 310         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 311         sp_canvas_item_hide(tc->dilate_area);
 312     }
 313
 314     tc->is_drawing = false;
 315
 316     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 317
 318     sp_event_context_read(ec, "width");
 319     sp_event_context_read(ec, "mode");
 320     sp_event_context_read(ec, "fidelity");
 321     sp_event_context_read(ec, "force");
 322     sp_event_context_read(ec, "usepressure");
 323     sp_event_context_read(ec, "doh");
 324     sp_event_context_read(ec, "dol");
 325     sp_event_context_read(ec, "dos");
 326     sp_event_context_read(ec, "doo");
 327
 328     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 329         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 330     );
 331
 332     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 333     if (prefs->getBool("/tools/tweak/selcue")) {
 334         ec->enableSelectionCue();
 335     }
 336
 337     if (prefs->getBool("/tools/tweak/gradientdrag")) {
 338         ec->enableGrDrag();
 339     }
 340 }
 341
 342 static void
 343 sp_tweak_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val)
 344 {
 345     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 346     Glib::ustring path = val->getEntryName();
 347
 348     if (path == "width") {
 349         tc->width = CLAMP(val->getDouble(0.1), -1000.0, 1000.0);
 350     } else if (path == "mode") {
 351         tc->mode = val->getInt();
 352         sp_tweak_update_cursor(tc, false);
 353     } else if (path == "fidelity") {
 354         tc->fidelity = CLAMP(val->getDouble(), 0.0, 1.0);
 355     } else if (path == "force") {
 356         tc->force = CLAMP(val->getDouble(1.0), 0, 1.0);
 357     } else if (path == "usepressure") {
 358         tc->usepressure = val->getBool();
 359     } else if (path == "doh") {
 360         tc->do_h = val->getBool();
 361     } else if (path == "dos") {
 362         tc->do_s = val->getBool();
 363     } else if (path == "dol") {
 364         tc->do_l = val->getBool();
 365     } else if (path == "doo") {
 366         tc->do_o = val->getBool();
 367     }
 368 }
 369
 370 static void
 371 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 372 {
 373     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 374         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 375     else
 376         tc->pressure = TC_DEFAULT_PRESSURE;
 377 }
 378
 379 double
 380 get_dilate_radius (SPTweakContext *tc)
 381 {
 382     // 10 times the pen width:
 383     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 384 }
 385
 386 double
 387 get_path_force (SPTweakContext *tc)
 388 {
 389     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 390         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 391     if (force > 3) {
 392         force += 4 * (force - 3);
 393     }
 394     return force * tc->force;
 395 }
 396
 397 double
 398 get_move_force (SPTweakContext *tc)
 399 {
 400     double force = (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE);
 401     return force * tc->force;
 402 }
 403
 404 bool
 405 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)
 406 {
 407     bool did = false;
 408
 409     if (SP_IS_BOX3D(item) && !is_transform_mode(mode) && !is_color_mode(mode)) {
 410         // convert 3D boxes to ordinary groups before tweaking their shapes
 411         item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));
 412         selection->add(item);
 413     }
 414
 415     if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 416         GSList *items = g_slist_prepend (NULL, item);
 417         GSList *selected = NULL;
 418         GSList *to_select = NULL;
 419         SPDocument *doc = SP_OBJECT_DOCUMENT(item);
 420         sp_item_list_to_curves (items, &selected, &to_select);
 421         g_slist_free (items);
 422         SPObject* newObj = doc->getObjectByRepr((Inkscape::XML::Node *) to_select->data);
 423         g_slist_free (to_select);
 424         item = (SPItem *) newObj;
 425         selection->add(item);
 426     }
 427
 428     if (SP_IS_GROUP(item) && !SP_IS_BOX3D(item)) {
 429         GSList *children = NULL;
 430         for (SPObject *child = item->firstChild() ; child; child = child->getNext() ) {
 431             if (SP_IS_ITEM(child)) {
 432                 children = g_slist_prepend(children, child);
 433             }
 434         }
 435
 436         for (GSList *i = children; i; i = i->next) {
 437             SPItem *child = SP_ITEM(i->data);
 438             if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity, reverse))
 439                 did = true;
 440         }
 441
 442         g_slist_free(children);
 443
 444     } else {
 445         if (mode == TWEAK_MODE_MOVE) {
 446
 447             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 448             if (a) {
 449                 double x = Geom::L2(a->midpoint() - p)/radius;
 450                 if (a->contains(p)) x = 0;
 451                 if (x < 1) {
 452                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) * vector;
 453                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], -move[Geom::Y]));
 454                     did = true;
 455                 }
 456             }
 457
 458         } else if (mode == TWEAK_MODE_MOVE_IN_OUT) {
 459
 460             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 461             if (a) {
 462                 double x = Geom::L2(a->midpoint() - p)/radius;
 463                 if (a->contains(p)) x = 0;
 464                 if (x < 1) {
 465                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) *
 466                         (reverse? (a->midpoint() - p) : (p - a->midpoint()));
 467                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], -move[Geom::Y]));
 468                     did = true;
 469                 }
 470             }
 471
 472         } else if (mode == TWEAK_MODE_MOVE_JITTER) {
 473
 474             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 475             if (a) {
 476                 double dp = g_random_double_range(0, M_PI*2);
 477                 double dr = g_random_double_range(0, radius);
 478                 double x = Geom::L2(a->midpoint() - p)/radius;
 479                 if (a->contains(p)) x = 0;
 480                 if (x < 1) {
 481                     Geom::Point move = force * 0.5 * (cos(M_PI * x) + 1) * Geom::Point(cos(dp)*dr, sin(dp)*dr);
 482                     sp_item_move_rel(item, Geom::Translate(move[Geom::X], -move[Geom::Y]));
 483                     did = true;
 484                 }
 485             }
 486
 487         } else if (mode == TWEAK_MODE_SCALE) {
 488
 489             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 490             if (a) {
 491                 double x = Geom::L2(a->midpoint() - p)/radius;
 492                 if (a->contains(p)) x = 0;
 493                 if (x < 1) {
 494                     double scale = 1 + (reverse? force : -force) * 0.05 * (cos(M_PI * x) + 1);
 495                     sp_item_scale_rel(item, Geom::Scale(scale, scale));
 496                     did = true;
 497                 }
 498             }
 499
 500         } else if (mode == TWEAK_MODE_ROTATE) {
 501
 502             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 503             if (a) {
 504                 double x = Geom::L2(a->midpoint() - p)/radius;
 505                 if (a->contains(p)) x = 0;
 506                 if (x < 1) {
 507                     double angle = (reverse? force : -force) * 0.05 * (cos(M_PI * x) + 1) * M_PI;
 508                     sp_item_rotate_rel(item, Geom::Rotate(angle));
 509                     did = true;
 510                 }
 511             }
 512
 513         } else if (mode == TWEAK_MODE_MORELESS) {
 514
 515             Geom::OptRect a = item->getBounds(item->i2doc_affine());
 516             if (a) {
 517                 double x = Geom::L2(a->midpoint() - p)/radius;
 518                 if (a->contains(p)) x = 0;
 519                 if (x < 1) {
 520                     double prob = force * 0.5 * (cos(M_PI * x) + 1);
 521                     double chance = g_random_double_range(0, 1);
 522                     if (chance <= prob) {
 523                         if (reverse) { // delete
 524                             sp_object_ref(SP_OBJECT(item), NULL);
 525                             SP_OBJECT(item)->deleteObject(true, true);
 526                             sp_object_unref(SP_OBJECT(item), NULL);
 527                         } else { // duplicate
 528                             SPDocument *doc = SP_OBJECT_DOCUMENT(item);
 529                             Inkscape::XML::Document* xml_doc = doc->getReprDoc();
 530                             Inkscape::XML::Node *old_repr = SP_OBJECT_REPR(item);
 531                             SPObject *old_obj = doc->getObjectByRepr(old_repr);
 532                             Inkscape::XML::Node *parent = old_repr->parent();
 533                             Inkscape::XML::Node *copy = old_repr->duplicate(xml_doc);
 534                             parent->appendChild(copy);
 535                             SPObject *new_obj = doc->getObjectByRepr(copy);
 536                             if (selection->includes(old_obj)) {
 537                                 selection->add(new_obj);
 538                             }
 539                             Inkscape::GC::release(copy);
 540                         }
 541                         did = true;
 542                     }
 543                 }
 544             }
 545
 546         } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item)) {
 547
 548         Inkscape::XML::Node *newrepr = NULL;
 549         gint pos = 0;
 550         Inkscape::XML::Node *parent = NULL;
 551         char const *id = NULL;
 552         if (!SP_IS_PATH(item)) {
 553             newrepr = sp_selected_item_to_curved_repr(item, 0);
 554             if (!newrepr)
 555                 return false;
 556
 557             // remember the position of the item
 558             pos = SP_OBJECT_REPR(item)->position();
 559             // remember parent
 560             parent = SP_OBJECT_REPR(item)->parent();
 561             // remember id
 562             id = SP_OBJECT_REPR(item)->attribute("id");
 563         }
 564
 565
 566         // skip those paths whose bboxes are entirely out of reach with our radius
 567         Geom::OptRect bbox = item->getBounds(item->i2doc_affine());
 568         if (bbox) {
 569             bbox->expandBy(radius);
 570             if (!bbox->contains(p)) {
 571                 return false;
 572             }
 573         }
 574
 575         Path *orig = Path_for_item(item, false);
 576         if (orig == NULL) {
 577             return false;
 578         }
 579
 580         Path *res = new Path;
 581         res->SetBackData(false);
 582
 583         Shape *theShape = new Shape;
 584         Shape *theRes = new Shape;
 585         Geom::Matrix i2doc(item->i2doc_affine());
 586
 587         orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / i2doc.descrim()); // default 0.059
 588         orig->Fill(theShape, 0);
 589
 590         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 591         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 592         if (val && strcmp(val, "nonzero") == 0)
 593         {
 594             theRes->ConvertToShape(theShape, fill_nonZero);
 595         }
 596         else if (val && strcmp(val, "evenodd") == 0)
 597         {
 598             theRes->ConvertToShape(theShape, fill_oddEven);
 599         }
 600         else
 601         {
 602             theRes->ConvertToShape(theShape, fill_nonZero);
 603         }
 604
 605         if (Geom::L2(vector) != 0)
 606             vector = 1/Geom::L2(vector) * vector;
 607
 608         bool did_this = false;
 609         if (mode == TWEAK_MODE_SHRINK_GROW) {
 610             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 611                                  reverse? force : -force,
 612                                  join_straight, 4.0,
 613                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 614               did_this = true;
 615         } else if (mode == TWEAK_MODE_ATTRACT_REPEL) {
 616             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 617                                  reverse? force : -force,
 618                                  join_straight, 4.0,
 619                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0)
 620               did_this = true;
 621         } else if (mode == TWEAK_MODE_PUSH) {
 622             if (theShape->MakeTweak(tweak_mode_push, theRes,
 623                                  1.0,
 624                                  join_straight, 4.0,
 625                                  true, p, force*2*vector, radius, &i2doc) == 0)
 626               did_this = true;
 627         } else if (mode == TWEAK_MODE_ROUGHEN) {
 628             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 629                                  force,
 630                                  join_straight, 4.0,
 631                                  true, p, Geom::Point(0,0), radius, &i2doc) == 0)
 632               did_this = true;
 633         }
 634
 635         // the rest only makes sense if we actually changed the path
 636         if (did_this) {
 637             theRes->ConvertToShape(theShape, fill_positive);
 638
 639             res->Reset();
 640             theRes->ConvertToForme(res);
 641
 642             double th_max = (0.6 - 0.59*sqrt(fidelity)) / i2doc.descrim();
 643             double threshold = MAX(th_max, th_max*force);
 644             res->ConvertEvenLines(threshold);
 645             res->Simplify(threshold / (selection->desktop()->current_zoom()));
 646
 647             if (newrepr) { // converting to path, need to replace the repr
 648                 bool is_selected = selection->includes(item);
 649                 if (is_selected)
 650                     selection->remove(item);
 651
 652                 // It's going to resurrect, so we delete without notifying listeners.
 653                 SP_OBJECT(item)->deleteObject(false);
 654
 655                 // restore id
 656                 newrepr->setAttribute("id", id);
 657                 // add the new repr to the parent
 658                 parent->appendChild(newrepr);
 659                 // move to the saved position
 660                 newrepr->setPosition(pos > 0 ? pos : 0);
 661
 662                 if (is_selected)
 663                     selection->add(newrepr);
 664             }
 665
 666             if (res->descr_cmd.size() > 1) {
 667                 gchar *str = res->svg_dump_path();
 668                 if (newrepr) {
 669                     newrepr->setAttribute("d", str);
 670                 } else {
 671                     if (SP_IS_LPE_ITEM(item) && sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(item))) {
 672                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 673                     } else {
 674                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 675                     }
 676                 }
 677                 g_free(str);
 678             } else {
 679                 // TODO: if there's 0 or 1 node left, delete this path altogether
 680             }
 681
 682             if (newrepr) {
 683                 Inkscape::GC::release(newrepr);
 684                 newrepr = NULL;
 685             }
 686         }
 687
 688         delete theShape;
 689         delete theRes;
 690         delete orig;
 691         delete res;
 692
 693         if (did_this)
 694             did = true;
 695     }
 696
 697     }
 698
 699     return did;
 700 }
 701
 702 void
 703 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 704 {
 705     float rgb_g[3];
 706
 707     if (!do_h || !do_s || !do_l) {
 708         float hsl_g[3];
 709         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 710         float hsl_c[3];
 711         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 712         if (!do_h)
 713             hsl_g[0] = hsl_c[0];
 714         if (!do_s)
 715             hsl_g[1] = hsl_c[1];
 716         if (!do_l)
 717             hsl_g[2] = hsl_c[2];
 718         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 719     } else {
 720         rgb_g[0] = SP_RGBA32_R_F(goal);
 721         rgb_g[1] = SP_RGBA32_G_F(goal);
 722         rgb_g[2] = SP_RGBA32_B_F(goal);
 723     }
 724
 725     for (int i = 0; i < 3; i++) {
 726         double d = rgb_g[i] - color[i];
 727         color[i] += d * force;
 728     }
 729 }
 730
 731 void
 732 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 733 {
 734     float hsl_c[3];
 735     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 736
 737     if (do_h) {
 738         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 739         if (hsl_c[0] > 1)
 740             hsl_c[0] -= 1;
 741         if (hsl_c[0] < 0)
 742             hsl_c[0] += 1;
 743     }
 744     if (do_s) {
 745         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 746     }
 747     if (do_l) {
 748         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 749     }
 750
 751     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 752 }
 753
 754 void
 755 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 756 {
 757     if (mode == TWEAK_MODE_COLORPAINT) {
 758         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 759     } else if (mode == TWEAK_MODE_COLORJITTER) {
 760         tweak_colorjitter (color, force, do_h, do_s, do_l);
 761     }
 762 }
 763
 764 void
 765 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 766 {
 767     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 768
 769     if (mode == TWEAK_MODE_COLORPAINT) {
 770         double d = opacity_goal - opacity;
 771         opacity += d * force;
 772     } else if (mode == TWEAK_MODE_COLORJITTER) {
 773         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 774     }
 775
 776     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 777 }
 778
 779
 780 double
 781 tweak_profile (double dist, double radius)
 782 {
 783     if (radius == 0)
 784         return 0;
 785     double x = dist / radius;
 786     double alpha = 1;
 787     if (x >= 1) {
 788         return 0;
 789     } else if (x <= 0) {
 790         return 1;
 791     } else {
 792         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 793     }
 794 }
 795
 796 void
 797 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 798                           guint32 const rgb_goal, Geom::Point p_w, double radius, double force, guint mode,
 799                           bool do_h, bool do_s, bool do_l, bool /*do_o*/)
 800 {
 801     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 802
 803     if (!gradient || !SP_IS_GRADIENT(gradient))
 804         return;
 805
 806     Geom::Matrix i2d (item->i2doc_affine ());
 807     Geom::Point p = p_w * i2d.inverse();
 808     p *= (gradient->gradientTransform).inverse();
 809     // now p is in gradient's original coordinates
 810
 811     double pos = 0;
 812     double r = 0;
 813     if (SP_IS_LINEARGRADIENT(gradient)) {
 814         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 815
 816         Geom::Point p1(lg->x1.computed, lg->y1.computed);
 817         Geom::Point p2(lg->x2.computed, lg->y2.computed);
 818         Geom::Point pdiff(p2 - p1);
 819         double vl = Geom::L2(pdiff);
 820
 821         // This is the matrix which moves and rotates the gradient line
 822         // so it's oriented along the X axis:
 823         Geom::Matrix norm = Geom::Matrix(Geom::Translate(-p1)) * Geom::Matrix(Geom::Rotate(-atan2(pdiff[Geom::Y], pdiff[Geom::X])));
 824
 825         // Transform the mouse point by it to find out its projection onto the gradient line:
 826         Geom::Point pnorm = p * norm;
 827
 828         // Scale its X coordinate to match the length of the gradient line:
 829         pos = pnorm[Geom::X] / vl;
 830         // Calculate radius in lenfth-of-gradient-line units
 831         r = radius / vl;
 832
 833     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 834         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 835         Geom::Point c (rg->cx.computed, rg->cy.computed);
 836         pos = Geom::L2(p - c) / rg->r.computed;
 837         r = radius / rg->r.computed;
 838     }
 839
 840     // Normalize pos to 0..1, taking into accound gradient spread:
 841     double pos_e = pos;
 842     if (gradient->getSpread() == SP_GRADIENT_SPREAD_PAD) {
 843         if (pos > 1) {
 844             pos_e = 1;
 845         }
 846         if (pos < 0) {
 847             pos_e = 0;
 848         }
 849     } else if (gradient->getSpread() == SP_GRADIENT_SPREAD_REPEAT) {
 850         if (pos > 1 || pos < 0) {
 851             pos_e = pos - floor(pos);
 852         }
 853     } else if (gradient->getSpread() == SP_GRADIENT_SPREAD_REFLECT) {
 854         if (pos > 1 || pos < 0) {
 855             bool odd = ((int)(floor(pos)) % 2 == 1);
 856             pos_e = pos - floor(pos);
 857             if (odd) {
 858                 pos_e = 1 - pos_e;
 859             }
 860         }
 861     }
 862
 863     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 864
 865     double offset_l = 0;
 866     double offset_h = 0;
 867     SPObject *child_prev = NULL;
 868     for (SPObject *child = vector->firstChild(); child; child = child->getNext()) {
 869         if (!SP_IS_STOP(child)) {
 870             continue;
 871         }
 872         SPStop *stop = SP_STOP (child);
 873
 874         offset_h = stop->offset;
 875
 876         if (child_prev) {
 877
 878             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 879                 // the summit falls in this interstop, and the radius is small,
 880                 // so it only affects the ends of this interstop;
 881                 // distribute the force between the two endstops so that they
 882                 // get all the painting even if they are not touched by the brush
 883                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 884                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 885                                   do_h, do_s, do_l);
 886                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 887                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 888                                   do_h, do_s, do_l);
 889                 SP_OBJECT(stop)->updateRepr();
 890                 child_prev->updateRepr();
 891                 break;
 892             } else {
 893                 // wide brush, may affect more than 2 stops,
 894                 // paint each stop by the force from the profile curve
 895                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 896                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 897                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 898                                  do_h, do_s, do_l);
 899                     child_prev->updateRepr();
 900                 }
 901
 902                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 903                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 904                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 905                                  do_h, do_s, do_l);
 906                     SP_OBJECT(stop)->updateRepr();
 907                 }
 908             }
 909         }
 910
 911         offset_l = offset_h;
 912         child_prev = child;
 913     }
 914 }
 915
 916 bool
 917 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 918                           guint32 fill_goal, bool do_fill,
 919                           guint32 stroke_goal, bool do_stroke,
 920                           float opacity_goal, bool do_opacity,
 921                           bool do_blur, bool reverse,
 922                           Geom::Point p, double radius, double force,
 923                           bool do_h, bool do_s, bool do_l, bool do_o)
 924 {
 925     bool did = false;
 926
 927     if (SP_IS_GROUP(item)) {
 928         for (SPObject *child = item->firstChild() ; child; child = child->getNext() ) {
 929             if (SP_IS_ITEM(child)) {
 930                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 931                                           fill_goal, do_fill,
 932                                           stroke_goal, do_stroke,
 933                                           opacity_goal, do_opacity,
 934                                           do_blur, reverse,
 935                                           p, radius, force, do_h, do_s, do_l, do_o))
 936                     did = true;
 937             }
 938         }
 939
 940     } else {
 941         SPStyle *style = SP_OBJECT_STYLE(item);
 942         if (!style) {
 943             return false;
 944         }
 945         Geom::OptRect bbox = item->getBounds(item->i2doc_affine(),
 946                                                         SPItem::GEOMETRIC_BBOX);
 947         if (!bbox) {
 948             return false;
 949         }
 950
 951         Geom::Rect brush(p - Geom::Point(radius, radius), p + Geom::Point(radius, radius));
 952
 953         Geom::Point center = bbox->midpoint();
 954         double this_force;
 955
 956 // if item == item_at_point, use max force
 957         if (item == item_at_point) {
 958             this_force = force;
 959 // else if no overlap of bbox and brush box, skip:
 960         } else if (!bbox->intersects(brush)) {
 961             return false;
 962 //TODO:
 963 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 964         //} else if (bbox->maxExtent() > 3 * radius) {
 965         //}
 966 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 967 // else if still smaller, then check only the object center:
 968         } else {
 969             this_force = force * tweak_profile (Geom::L2 (p - center), radius);
 970         }
 971
 972         if (this_force > 0.002) {
 973
 974             if (do_blur) {
 975                 Geom::OptRect bbox = item->getBounds(item->i2doc_affine(),
 976                                                         SPItem::GEOMETRIC_BBOX);
 977                 if (!bbox) {
 978                     return did;
 979                 }
 980
 981                 double blur_now = 0;
 982                 Geom::Matrix i2d = item->i2d_affine ();
 983                 if (style->filter.set && style->getFilter()) {
 984                     //cycle through filter primitives
 985                     SPObject *primitive_obj = style->getFilter()->children;
 986                     while (primitive_obj) {
 987                         if (SP_IS_FILTER_PRIMITIVE(primitive_obj)) {
 988                             SPFilterPrimitive *primitive = SP_FILTER_PRIMITIVE(primitive_obj);
 989                             //if primitive is gaussianblur
 990                             if(SP_IS_GAUSSIANBLUR(primitive)) {
 991                                 SPGaussianBlur * spblur = SP_GAUSSIANBLUR(primitive);
 992                                 float num = spblur->stdDeviation.getNumber();
 993                                 blur_now += num * i2d.descrim(); // sum all blurs in the filter
 994                             }
 995                         }
 996                         primitive_obj = primitive_obj->next;
 997                     }
 998                 }
 999                 double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];
1000                 blur_now = blur_now / perimeter;
1001
1002                 double blur_new;
1003                 if (reverse)
1004                     blur_new = blur_now - 0.06 * force;
1005                 else
1006                     blur_new = blur_now + 0.06 * force;
1007                 if (blur_new < 0.0005 && blur_new < blur_now) {
1008                     blur_new = 0;
1009                 }
1010
1011                 if (blur_new == 0) {
1012                     remove_filter(item, false);
1013                 } else {
1014                     double radius = blur_new * perimeter;
1015                     SPFilter *filter = modify_filter_gaussian_blur_from_item(SP_OBJECT_DOCUMENT(item), item, radius);
1016
1017                     sp_style_set_property_url(item, "filter", filter, false);
1018                 }
1019                 return true; // do not do colors, blur is a separate mode
1020             }
1021
1022             if (do_fill) {
1023                 if (style->fill.isPaintserver()) {
1024                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
1025                     did = true;
1026                 } else if (style->fill.isColor()) {
1027                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
1028                     item->updateRepr();
1029                     did = true;
1030                 }
1031             }
1032             if (do_stroke) {
1033                 if (style->stroke.isPaintserver()) {
1034                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
1035                     did = true;
1036                 } else if (style->stroke.isColor()) {
1037                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
1038                     item->updateRepr();
1039                     did = true;
1040                 }
1041             }
1042             if (do_opacity && do_o) {
1043                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
1044             }
1045         }
1046     }
1047
1048     return did;
1049 }
1050
1051
1052 bool
1053 sp_tweak_dilate (SPTweakContext *tc, Geom::Point event_p, Geom::Point p, Geom::Point vector, bool reverse)
1054 {
1055     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
1056     SPDesktop *desktop = SP_EVENT_CONTEXT(tc)->desktop;
1057
1058     if (selection->isEmpty()) {
1059         return false;
1060     }
1061
1062     bool did = false;
1063     double radius = get_dilate_radius(tc);
1064
1065     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->getItemAtPoint(event_p, TRUE);
1066
1067     bool do_fill = false, do_stroke = false, do_opacity = false;
1068     guint32 fill_goal = sp_desktop_get_color_tool(desktop, "/tools/tweak", true, &do_fill);
1069     guint32 stroke_goal = sp_desktop_get_color_tool(desktop, "/tools/tweak", false, &do_stroke);
1070     double opacity_goal = sp_desktop_get_master_opacity_tool(desktop, "/tools/tweak", &do_opacity);
1071     if (reverse) {
1072 #if 0
1073         // HSL inversion
1074         float hsv[3];
1075         float rgb[3];
1076         sp_color_rgb_to_hsv_floatv (hsv,
1077                                     SP_RGBA32_R_F(fill_goal),
1078                                     SP_RGBA32_G_F(fill_goal),
1079                                     SP_RGBA32_B_F(fill_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         fill_goal = SP_RGBA32_F_COMPOSE(rgb[0], rgb[1], rgb[2], 1);
1082         sp_color_rgb_to_hsv_floatv (hsv,
1083                                     SP_RGBA32_R_F(stroke_goal),
1084                                     SP_RGBA32_G_F(stroke_goal),
1085                                     SP_RGBA32_B_F(stroke_goal));
1086         sp_color_hsv_to_rgb_floatv (rgb, hsv[0]<.5? hsv[0]+.5 : hsv[0]-.5, 1 - hsv[1], 1 - hsv[2]);
1087         stroke_goal = SP_RGBA32_F_COMPOSE(rgb[0], rgb[1], rgb[2], 1);
1088 #else
1089         // RGB inversion
1090         fill_goal = SP_RGBA32_U_COMPOSE(
1091             (255 - SP_RGBA32_R_U(fill_goal)),
1092             (255 - SP_RGBA32_G_U(fill_goal)),
1093             (255 - SP_RGBA32_B_U(fill_goal)),
1094             (255 - SP_RGBA32_A_U(fill_goal)));
1095         stroke_goal = SP_RGBA32_U_COMPOSE(
1096             (255 - SP_RGBA32_R_U(stroke_goal)),
1097             (255 - SP_RGBA32_G_U(stroke_goal)),
1098             (255 - SP_RGBA32_B_U(stroke_goal)),
1099             (255 - SP_RGBA32_A_U(stroke_goal)));
1100 #endif
1101         opacity_goal = 1 - opacity_goal;
1102     }
1103
1104     double path_force = get_path_force(tc);
1105     if (radius == 0 || path_force == 0) {
1106         return false;
1107     }
1108     double move_force = get_move_force(tc);
1109     double color_force = MIN(sqrt(path_force)/20.0, 1);
1110
1111     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1112          items != NULL;
1113          items = items->next) {
1114
1115         SPItem *item = (SPItem *) items->data;
1116
1117         if (is_color_mode (tc->mode)) {
1118             if (do_fill || do_stroke || do_opacity) {
1119                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
1120                                           fill_goal, do_fill,
1121                                           stroke_goal, do_stroke,
1122                                           opacity_goal, do_opacity,
1123                                           tc->mode == TWEAK_MODE_BLUR, reverse,
1124                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
1125                 did = true;
1126             }
1127         } else if (is_transform_mode(tc->mode)) {
1128             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, move_force, tc->fidelity, reverse))
1129                 did = true;
1130         } else {
1131             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, path_force, tc->fidelity, reverse))
1132                 did = true;
1133         }
1134     }
1135
1136     return did;
1137 }
1138
1139 void
1140 sp_tweak_update_area (SPTweakContext *tc)
1141 {
1142         double radius = get_dilate_radius(tc);
1143         Geom::Matrix const sm (Geom::Scale(radius, radius) * Geom::Translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
1144         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
1145         sp_canvas_item_show(tc->dilate_area);
1146 }
1147
1148 void
1149 sp_tweak_switch_mode (SPTweakContext *tc, gint mode, bool with_shift)
1150 {
1151     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
1152     // need to set explicitly, because the prefs may not have changed by the previous
1153     tc->mode = mode;
1154     sp_tweak_update_cursor (tc, with_shift);
1155 }
1156
1157 void
1158 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode, bool with_shift)
1159 {
1160     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1161    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
1162    gint now_mode = prefs->getInt("/tools/tweak/mode", 0);
1163    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
1164    // button has changed prefs, restore
1165    prefs->setInt("/tools/tweak/mode", now_mode);
1166    // changing prefs changed tc->mode, restore back :)
1167    tc->mode = mode;
1168    sp_tweak_update_cursor (tc, with_shift);
1169 }
1170
1171 gint
1172 sp_tweak_context_root_handler(SPEventContext *event_context,
1173                                   GdkEvent *event)
1174 {
1175     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
1176     SPDesktop *desktop = event_context->desktop;
1177
1178     gint ret = FALSE;
1179
1180     switch (event->type) {
1181         case GDK_ENTER_NOTIFY:
1182             sp_canvas_item_show(tc->dilate_area);
1183             break;
1184         case GDK_LEAVE_NOTIFY:
1185             sp_canvas_item_hide(tc->dilate_area);
1186             break;
1187         case GDK_BUTTON_PRESS:
1188             if (event->button.button == 1 && !event_context->space_panning) {
1189
1190                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
1191                     return TRUE;
1192                 }
1193
1194                 Geom::Point const button_w(event->button.x,
1195                                          event->button.y);
1196                 Geom::Point const button_dt(desktop->w2d(button_w));
1197                 tc->last_push = desktop->dt2doc(button_dt);
1198
1199                 sp_tweak_extinput(tc, event);
1200
1201                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
1202                 tc->is_drawing = true;
1203                 tc->is_dilating = true;
1204                 tc->has_dilated = false;
1205
1206                 ret = TRUE;
1207             }
1208             break;
1209         case GDK_MOTION_NOTIFY:
1210         {
1211             Geom::Point const motion_w(event->motion.x,
1212                                      event->motion.y);
1213             Geom::Point motion_dt(desktop->w2d(motion_w));
1214             Geom::Point motion_doc(desktop->dt2doc(motion_dt));
1215             sp_tweak_extinput(tc, event);
1216
1217             // draw the dilating cursor
1218                 double radius = get_dilate_radius(tc);
1219                 Geom::Matrix const sm (Geom::Scale(radius, radius) * Geom::Translate(desktop->w2d(motion_w)));
1220                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
1221                 sp_canvas_item_show(tc->dilate_area);
1222
1223                 guint num = 0;
1224                 if (!desktop->selection->isEmpty()) {
1225                     num = g_slist_length((GSList *) desktop->selection->itemList());
1226                 }
1227                 if (num == 0) {
1228                     tc->_message_context->flash(Inkscape::ERROR_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
1229                 }
1230
1231             // dilating:
1232             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
1233                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push, event->button.state & GDK_SHIFT_MASK? true : false);
1234                 //tc->last_push = motion_doc;
1235                 tc->has_dilated = true;
1236                 // it's slow, so prevent clogging up with events
1237                 gobble_motion_events(GDK_BUTTON1_MASK);
1238                 return TRUE;
1239             }
1240
1241         }
1242         break;
1243
1244
1245     case GDK_BUTTON_RELEASE:
1246     {
1247         Geom::Point const motion_w(event->button.x, event->button.y);
1248         Geom::Point const motion_dt(desktop->w2d(motion_w));
1249
1250         sp_canvas_end_forced_full_redraws(desktop->canvas);
1251         tc->is_drawing = false;
1252
1253         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1254             if (!tc->has_dilated) {
1255                 // if we did not rub, do a light tap
1256                 tc->pressure = 0.03;
1257                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), Geom::Point(0,0), MOD__SHIFT);
1258             }
1259             tc->is_dilating = false;
1260             tc->has_dilated = false;
1261             switch (tc->mode) {
1262                 case TWEAK_MODE_MOVE:
1263                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1264                                        SP_VERB_CONTEXT_TWEAK, _("Move tweak"));
1265                     break;
1266                 case TWEAK_MODE_MOVE_IN_OUT:
1267                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1268                                        SP_VERB_CONTEXT_TWEAK, _("Move in/out tweak"));
1269                     break;
1270                 case TWEAK_MODE_MOVE_JITTER:
1271                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1272                                        SP_VERB_CONTEXT_TWEAK, _("Move jitter tweak"));
1273                     break;
1274                 case TWEAK_MODE_SCALE:
1275                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1276                                        SP_VERB_CONTEXT_TWEAK, _("Scale tweak"));
1277                     break;
1278                 case TWEAK_MODE_ROTATE:
1279                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1280                                        SP_VERB_CONTEXT_TWEAK, _("Rotate tweak"));
1281                     break;
1282                 case TWEAK_MODE_MORELESS:
1283                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1284                                        SP_VERB_CONTEXT_TWEAK, _("Duplicate/delete tweak"));
1285                     break;
1286                 case TWEAK_MODE_PUSH:
1287                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1288                                        SP_VERB_CONTEXT_TWEAK, _("Push path tweak"));
1289                     break;
1290                 case TWEAK_MODE_SHRINK_GROW:
1291                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1292                                        SP_VERB_CONTEXT_TWEAK, _("Shrink/grow path tweak"));
1293                     break;
1294                 case TWEAK_MODE_ATTRACT_REPEL:
1295                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1296                                        SP_VERB_CONTEXT_TWEAK, _("Attract/repel path tweak"));
1297                     break;
1298                 case TWEAK_MODE_ROUGHEN:
1299                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1300                                        SP_VERB_CONTEXT_TWEAK, _("Roughen path tweak"));
1301                     break;
1302                 case TWEAK_MODE_COLORPAINT:
1303                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1304                                        SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1305                     break;
1306                 case TWEAK_MODE_COLORJITTER:
1307                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1308                                        SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1309                     break;
1310                 case TWEAK_MODE_BLUR:
1311                     DocumentUndo::done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1312                                        SP_VERB_CONTEXT_TWEAK, _("Blur tweak"));
1313                     break;
1314             }
1315         }
1316         break;
1317     }
1318
1319     case GDK_KEY_PRESS:
1320         switch (get_group0_keyval (&event->key)) {
1321         case GDK_m:
1322         case GDK_M:
1323         case GDK_0:
1324             if (MOD__SHIFT_ONLY) {
1325                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE, MOD__SHIFT);
1326                 ret = TRUE;
1327             }
1328             break;
1329         case GDK_i:
1330         case GDK_I:
1331         case GDK_1:
1332             if (MOD__SHIFT_ONLY) {
1333                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE_IN_OUT, MOD__SHIFT);
1334                 ret = TRUE;
1335             }
1336             break;
1337         case GDK_z:
1338         case GDK_Z:
1339         case GDK_2:
1340             if (MOD__SHIFT_ONLY) {
1341                 sp_tweak_switch_mode(tc, TWEAK_MODE_MOVE_JITTER, MOD__SHIFT);
1342                 ret = TRUE;
1343             }
1344             break;
1345         case GDK_less:
1346         case GDK_comma:
1347         case GDK_greater:
1348         case GDK_period:
1349         case GDK_3:
1350             if (MOD__SHIFT_ONLY) {
1351                 sp_tweak_switch_mode(tc, TWEAK_MODE_SCALE, MOD__SHIFT);
1352                 ret = TRUE;
1353             }
1354             break;
1355         case GDK_bracketright:
1356         case GDK_bracketleft:
1357         case GDK_4:
1358             if (MOD__SHIFT_ONLY) {
1359                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROTATE, MOD__SHIFT);
1360                 ret = TRUE;
1361             }
1362             break;
1363         case GDK_d:
1364         case GDK_D:
1365         case GDK_5:
1366             if (MOD__SHIFT_ONLY) {
1367                 sp_tweak_switch_mode(tc, TWEAK_MODE_MORELESS, MOD__SHIFT);
1368                 ret = TRUE;
1369             }
1370             break;
1371         case GDK_p:
1372         case GDK_P:
1373         case GDK_6:
1374             if (MOD__SHIFT_ONLY) {
1375                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH, MOD__SHIFT);
1376                 ret = TRUE;
1377             }
1378             break;
1379         case GDK_s:
1380         case GDK_S:
1381         case GDK_7:
1382             if (MOD__SHIFT_ONLY) {
1383                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK_GROW, MOD__SHIFT);
1384                 ret = TRUE;
1385             }
1386             break;
1387         case GDK_a:
1388         case GDK_A:
1389         case GDK_8:
1390             if (MOD__SHIFT_ONLY) {
1391                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT_REPEL, MOD__SHIFT);
1392                 ret = TRUE;
1393             }
1394             break;
1395         case GDK_r:
1396         case GDK_R:
1397         case GDK_9:
1398             if (MOD__SHIFT_ONLY) {
1399                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN, MOD__SHIFT);
1400                 ret = TRUE;
1401             }
1402             break;
1403         case GDK_c:
1404         case GDK_C:
1405             if (MOD__SHIFT_ONLY) {
1406                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT, MOD__SHIFT);
1407                 ret = TRUE;
1408             }
1409             break;
1410         case GDK_j:
1411         case GDK_J:
1412             if (MOD__SHIFT_ONLY) {
1413                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER, MOD__SHIFT);
1414                 ret = TRUE;
1415             }
1416             break;
1417         case GDK_b:
1418         case GDK_B:
1419             if (MOD__SHIFT_ONLY) {
1420                 sp_tweak_switch_mode(tc, TWEAK_MODE_BLUR, MOD__SHIFT);
1421                 ret = TRUE;
1422             }
1423             break;
1424
1425         case GDK_Up:
1426         case GDK_KP_Up:
1427             if (!MOD__CTRL_ONLY) {
1428                 tc->force += 0.05;
1429                 if (tc->force > 1.0)
1430                     tc->force = 1.0;
1431                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1432                 ret = TRUE;
1433             }
1434             break;
1435         case GDK_Down:
1436         case GDK_KP_Down:
1437             if (!MOD__CTRL_ONLY) {
1438                 tc->force -= 0.05;
1439                 if (tc->force < 0.0)
1440                     tc->force = 0.0;
1441                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1442                 ret = TRUE;
1443             }
1444             break;
1445         case GDK_Right:
1446         case GDK_KP_Right:
1447             if (!MOD__CTRL_ONLY) {
1448                 tc->width += 0.01;
1449                 if (tc->width > 1.0)
1450                     tc->width = 1.0;
1451                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1452                 sp_tweak_update_area(tc);
1453                 ret = TRUE;
1454             }
1455             break;
1456         case GDK_Left:
1457         case GDK_KP_Left:
1458             if (!MOD__CTRL_ONLY) {
1459                 tc->width -= 0.01;
1460                 if (tc->width < 0.01)
1461                     tc->width = 0.01;
1462                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1463                 sp_tweak_update_area(tc);
1464                 ret = TRUE;
1465             }
1466             break;
1467         case GDK_Home:
1468         case GDK_KP_Home:
1469             tc->width = 0.01;
1470             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1471             sp_tweak_update_area(tc);
1472             ret = TRUE;
1473             break;
1474         case GDK_End:
1475         case GDK_KP_End:
1476             tc->width = 1.0;
1477             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1478             sp_tweak_update_area(tc);
1479             ret = TRUE;
1480             break;
1481         case GDK_x:
1482         case GDK_X:
1483             if (MOD__ALT_ONLY) {
1484                 desktop->setToolboxFocusTo ("altx-tweak");
1485                 ret = TRUE;
1486             }
1487             break;
1488
1489         case GDK_Shift_L:
1490         case GDK_Shift_R:
1491             sp_tweak_update_cursor(tc, true);
1492             break;
1493
1494         case GDK_Control_L:
1495         case GDK_Control_R:
1496             sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK_GROW, MOD__SHIFT);
1497             break;
1498         default:
1499             break;
1500         }
1501         break;
1502
1503     case GDK_KEY_RELEASE: {
1504         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1505         switch (get_group0_keyval(&event->key)) {
1506             case GDK_Shift_L:
1507             case GDK_Shift_R:
1508                 sp_tweak_update_cursor(tc, false);
1509                 break;
1510             case GDK_Control_L:
1511             case GDK_Control_R:
1512                 sp_tweak_switch_mode (tc, prefs->getInt("/tools/tweak/mode"), MOD__SHIFT);
1513                 tc->_message_context->clear();
1514                 break;
1515             default:
1516                 sp_tweak_switch_mode (tc, prefs->getInt("/tools/tweak/mode"), MOD__SHIFT);
1517                 break;
1518         }
1519     }
1520
1521     default:
1522         break;
1523     }
1524
1525     if (!ret) {
1526         if (((SPEventContextClass *) parent_class)->root_handler) {
1527             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1528         }
1529     }
1530
1531     return ret;
1532 }
1533
1534
1535 /*
1536   Local Variables:
1537   mode:c++
1538   c-file-style:"stroustrup"
1539   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1540   indent-tabs-mode:nil
1541   fill-column:99
1542   End:
1543 */
1544 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :