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