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