src/tweak-context.cpp

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