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-thin.xpm"
  37 #include "pixmaps/cursor-thicken.xpm"
  38 #include "pixmaps/cursor-attract.xpm"
  39 #include "pixmaps/cursor-repel.xpm"
  40 #include "pixmaps/cursor-push.xpm"
  41 #include "pixmaps/cursor-roughen.xpm"
  42 #include "pixmaps/cursor-color.xpm"
  43 #include "libnr/n-art-bpath.h"
  44 #include "libnr/nr-path.h"
  45 #include "libnr/nr-maybe.h"
  46 #include "libnr/nr-matrix-ops.h"
  47 #include "libnr/nr-scale-translate-ops.h"
  48 #include "xml/repr.h"
  49 #include "context-fns.h"
  50 #include "sp-item.h"
  51 #include "inkscape.h"
  52 #include "color.h"
  53 #include "svg/svg-color.h"
  54 #include "splivarot.h"
  55 #include "sp-item-group.h"
  56 #include "sp-shape.h"
  57 #include "sp-path.h"
  58 #include "path-chemistry.h"
  59 #include "sp-gradient.h"
  60 #include "sp-stop.h"
  61 #include "sp-stop-fns.h"
  62 #include "sp-gradient-reference.h"
  63 #include "sp-linear-gradient.h"
  64 #include "sp-radial-gradient.h"
  65 #include "gradient-chemistry.h"
  66 #include "sp-text.h"
  67 #include "sp-flowtext.h"
  68 #include "display/canvas-bpath.h"
  69 #include "display/canvas-arena.h"
  70 #include "livarot/Shape.h"
  71 #include "isnan.h"
  72 #include "prefs-utils.h"
  73 #include "style.h"
  74
  75 #include "tweak-context.h"
  76
  77 #define DDC_RED_RGBA 0xff0000ff
  78
  79 #define DYNA_MIN_WIDTH 1.0e-6
  80
  81 // FIXME: move it to some shared file to be reused by both calligraphy and dropper
  82 #define C1 0.552
  83 static NArtBpath const hatch_area_circle[] = {
  84     { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
  85     { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
  86     { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
  87     { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
  88     { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
  89     { NR_END, 0, 0, 0, 0, 0, 0 }
  90 };
  91 #undef C1
  92
  93
  94 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  95 static void sp_tweak_context_init(SPTweakContext *ddc);
  96 static void sp_tweak_context_dispose(GObject *object);
  97
  98 static void sp_tweak_context_setup(SPEventContext *ec);
  99 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
 100 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
 101
 102 static SPEventContextClass *parent_class;
 103
 104 GtkType
 105 sp_tweak_context_get_type(void)
 106 {
 107     static GType type = 0;
 108     if (!type) {
 109         GTypeInfo info = {
 110             sizeof(SPTweakContextClass),
 111             NULL, NULL,
 112             (GClassInitFunc) sp_tweak_context_class_init,
 113             NULL, NULL,
 114             sizeof(SPTweakContext),
 115             4,
 116             (GInstanceInitFunc) sp_tweak_context_init,
 117             NULL,   /* value_table */
 118         };
 119         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 120     }
 121     return type;
 122 }
 123
 124 static void
 125 sp_tweak_context_class_init(SPTweakContextClass *klass)
 126 {
 127     GObjectClass *object_class = (GObjectClass *) klass;
 128     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 129
 130     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 131
 132     object_class->dispose = sp_tweak_context_dispose;
 133
 134     event_context_class->setup = sp_tweak_context_setup;
 135     event_context_class->set = sp_tweak_context_set;
 136     event_context_class->root_handler = sp_tweak_context_root_handler;
 137 }
 138
 139 static void
 140 sp_tweak_context_init(SPTweakContext *tc)
 141 {
 142     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 143
 144     event_context->cursor_shape = cursor_push_xpm;
 145     event_context->hot_x = 4;
 146     event_context->hot_y = 4;
 147
 148     /* attributes */
 149     tc->dragging = FALSE;
 150
 151     tc->width = 0.2;
 152     tc->force = 0.2;
 153     tc->pressure = TC_DEFAULT_PRESSURE;
 154
 155     tc->is_dilating = false;
 156     tc->has_dilated = false;
 157
 158     tc->do_h = true;
 159     tc->do_s = true;
 160     tc->do_l = true;
 161     tc->do_o = false;
 162
 163     new (&tc->style_set_connection) sigc::connection();
 164 }
 165
 166 static void
 167 sp_tweak_context_dispose(GObject *object)
 168 {
 169     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 170
 171     tc->style_set_connection.disconnect();
 172     tc->style_set_connection.~connection();
 173
 174     if (tc->dilate_area) {
 175         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 176         tc->dilate_area = NULL;
 177     }
 178
 179     if (tc->_message_context) {
 180         delete tc->_message_context;
 181     }
 182
 183     G_OBJECT_CLASS(parent_class)->dispose(object);
 184 }
 185
 186 void
 187 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 188 {
 189     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 190    switch (mode) {
 191        case TWEAK_MODE_PUSH:
 192            event_context->cursor_shape = cursor_push_xpm;
 193            break;
 194        case TWEAK_MODE_SHRINK:
 195            event_context->cursor_shape = cursor_thin_xpm;
 196            break;
 197        case TWEAK_MODE_GROW:
 198            event_context->cursor_shape = cursor_thicken_xpm;
 199            break;
 200        case TWEAK_MODE_ATTRACT:
 201            event_context->cursor_shape = cursor_attract_xpm;
 202            break;
 203        case TWEAK_MODE_REPEL:
 204            event_context->cursor_shape = cursor_repel_xpm;
 205            break;
 206        case TWEAK_MODE_ROUGHEN:
 207            event_context->cursor_shape = cursor_roughen_xpm;
 208            break;
 209        case TWEAK_MODE_COLORPAINT:
 210        case TWEAK_MODE_COLORJITTER:
 211            event_context->cursor_shape = cursor_color_xpm;
 212            break;
 213    }
 214    sp_event_context_update_cursor(event_context);
 215 }
 216
 217 static bool
 218 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 219 {
 220     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 221         // we cannot store properties with uris
 222         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 223
 224         sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");
 225
 226         return true;
 227     }
 228     return false;
 229 }
 230
 231
 232 static void
 233 sp_tweak_context_setup(SPEventContext *ec)
 234 {
 235     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 236
 237     if (((SPEventContextClass *) parent_class)->setup)
 238         ((SPEventContextClass *) parent_class)->setup(ec);
 239
 240     {
 241         SPCurve *c = sp_curve_new_from_foreign_bpath(hatch_area_circle);
 242         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 243         sp_curve_unref(c);
 244         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 245         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 246         sp_canvas_item_hide(tc->dilate_area);
 247     }
 248
 249     sp_event_context_read(ec, "width");
 250     sp_event_context_read(ec, "mode");
 251     sp_event_context_read(ec, "fidelity");
 252     sp_event_context_read(ec, "force");
 253     sp_event_context_read(ec, "usepressure");
 254     sp_event_context_read(ec, "doh");
 255     sp_event_context_read(ec, "dol");
 256     sp_event_context_read(ec, "dos");
 257     sp_event_context_read(ec, "doo");
 258
 259     tc->is_drawing = false;
 260
 261     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 262
 263     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 264         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 265     );
 266 }
 267
 268 static void
 269 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 270 {
 271     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 272
 273     if (!strcmp(key, "width")) {
 274         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 275         tc->width = CLAMP(dval, -1000.0, 1000.0);
 276     } else if (!strcmp(key, "mode")) {
 277         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 278         tc->mode = dval;
 279         sp_tweak_update_cursor(tc, tc->mode);
 280     } else if (!strcmp(key, "fidelity")) {
 281         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 282         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 283     } else if (!strcmp(key, "force")) {
 284         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 285         tc->force = CLAMP(dval, 0, 1.0);
 286     } else if (!strcmp(key, "usepressure")) {
 287         tc->usepressure = (val && strcmp(val, "0"));
 288     } else if (!strcmp(key, "doh")) {
 289         tc->do_h = (val && strcmp(val, "0"));
 290     } else if (!strcmp(key, "dos")) {
 291         tc->do_s = (val && strcmp(val, "0"));
 292     } else if (!strcmp(key, "dol")) {
 293         tc->do_l = (val && strcmp(val, "0"));
 294     } else if (!strcmp(key, "doo")) {
 295         tc->do_o = (val && strcmp(val, "0"));
 296     }
 297 }
 298
 299 static void
 300 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 301 {
 302     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 303         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 304     else
 305         tc->pressure = TC_DEFAULT_PRESSURE;
 306 }
 307
 308 double
 309 get_dilate_radius (SPTweakContext *tc)
 310 {
 311     // 10 times the pen width:
 312     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 313 }
 314
 315 double
 316 get_dilate_force (SPTweakContext *tc)
 317 {
 318     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 319         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 320     if (force > 3) {
 321         force += 4 * (force - 3);
 322     }
 323     return force * tc->force;
 324 }
 325
 326 bool
 327 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 328 {
 329     bool did = false;
 330
 331     if (SP_IS_GROUP(item)) {
 332         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 333             if (SP_IS_ITEM(child)) {
 334                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 335                     did = true;
 336             }
 337         }
 338
 339     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 340
 341         Inkscape::XML::Node *newrepr = NULL;
 342         gint pos = 0;
 343         Inkscape::XML::Node *parent = NULL;
 344         char const *id = NULL;
 345         if (!SP_IS_PATH(item)) {
 346             newrepr = sp_selected_item_to_curved_repr(item, 0);
 347             if (!newrepr)
 348                 return false;
 349
 350             // remember the position of the item
 351             pos = SP_OBJECT_REPR(item)->position();
 352             // remember parent
 353             parent = SP_OBJECT_REPR(item)->parent();
 354             // remember id
 355             id = SP_OBJECT_REPR(item)->attribute("id");
 356         }
 357
 358
 359         // skip those paths whose bboxes are entirely out of reach with our radius
 360         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));
 361         if (bbox) {
 362             bbox->growBy(radius);
 363             if (!bbox->contains(p)) {
 364                 return false;
 365             }
 366         }
 367
 368         Path *orig = Path_for_item(item, false);
 369         if (orig == NULL) {
 370             return false;
 371         }
 372         Path *res = new Path;
 373         res->SetBackData(false);
 374
 375         Shape *theShape = new Shape;
 376         Shape *theRes = new Shape;
 377
 378         orig->ConvertWithBackData(0.08 - (0.07 * fidelity)); // default 0.059
 379         orig->Fill(theShape, 0);
 380
 381         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 382         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 383         if (val && strcmp(val, "nonzero") == 0)
 384         {
 385             theRes->ConvertToShape(theShape, fill_nonZero);
 386         }
 387         else if (val && strcmp(val, "evenodd") == 0)
 388         {
 389             theRes->ConvertToShape(theShape, fill_oddEven);
 390         }
 391         else
 392         {
 393             theRes->ConvertToShape(theShape, fill_nonZero);
 394         }
 395
 396         if (NR::L2(vector) != 0)
 397             vector = 1/NR::L2(vector) * vector;
 398
 399         bool did_this = false;
 400         NR::Matrix i2doc(sp_item_i2doc_affine(item));
 401         if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {
 402             if (theShape->MakeOffset(theRes,
 403                                  mode == TWEAK_MODE_GROW? force : -force,
 404                                  join_straight, 4.0,
 405                                  true, p[NR::X], p[NR::Y], radius, &i2doc) == 0) // 0 means the shape was actually changed
 406               did_this = true;
 407         } else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {
 408             if (theShape->MakeRepel(theRes,
 409                                  mode == TWEAK_MODE_REPEL? force : -force,
 410                                  join_straight, 4.0,
 411                                  true, p[NR::X], p[NR::Y], radius, &i2doc) == 0)
 412               did_this = true;
 413         } else if (mode == TWEAK_MODE_PUSH) {
 414             if (theShape->MakePush(theRes,
 415                                  join_straight, 4.0,
 416                                  true, p, force*2*vector, radius, &i2doc) == 0)
 417               did_this = true;
 418         } else if (mode == TWEAK_MODE_ROUGHEN) {
 419             if (theShape->MakeJitter(theRes,
 420                                  join_straight, 4.0,
 421                                  true, p, force, radius, &i2doc) == 0)
 422               did_this = true;
 423         }
 424
 425         // the rest only makes sense if we actually changed the path
 426         if (did_this) {
 427             theRes->ConvertToShape(theShape, fill_positive);
 428
 429             res->Reset();
 430             theRes->ConvertToForme(res);
 431
 432             double th_max = 0.6 - 0.59*sqrt(fidelity);
 433             double threshold = MAX(th_max, th_max*force);
 434             res->ConvertEvenLines(threshold);
 435             res->Simplify(threshold);
 436
 437             if (newrepr) { // converting to path, need to replace the repr
 438                 bool is_selected = selection->includes(item);
 439                 if (is_selected)
 440                     selection->remove(item);
 441
 442                 // It's going to resurrect, so we delete without notifying listeners.
 443                 SP_OBJECT(item)->deleteObject(false);
 444
 445                 // restore id
 446                 newrepr->setAttribute("id", id);
 447                 // add the new repr to the parent
 448                 parent->appendChild(newrepr);
 449                 // move to the saved position
 450                 newrepr->setPosition(pos > 0 ? pos : 0);
 451
 452                 if (is_selected)
 453                     selection->add(newrepr);
 454             }
 455
 456             if (res->descr_cmd.size() > 1) {
 457                 gchar *str = res->svg_dump_path();
 458                 if (newrepr)
 459                     newrepr->setAttribute("d", str);
 460                 else
 461                     SP_OBJECT_REPR(item)->setAttribute("d", str);
 462                 g_free(str);
 463             } else {
 464                 // TODO: if there's 0 or 1 node left, delete this path altogether
 465             }
 466
 467             if (newrepr) {
 468                 Inkscape::GC::release(newrepr);
 469                 newrepr = NULL;
 470             }
 471         }
 472
 473         delete theShape;
 474         delete theRes;
 475         delete orig;
 476         delete res;
 477
 478         if (did_this)
 479             did = true;
 480     }
 481
 482     return did;
 483 }
 484
 485 void
 486 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 487 {
 488     float rgb_g[3];
 489
 490     if (!do_h || !do_s || !do_l) {
 491         float hsl_g[3];
 492         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 493         float hsl_c[3];
 494         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 495         if (!do_h)
 496             hsl_g[0] = hsl_c[0];
 497         if (!do_s)
 498             hsl_g[1] = hsl_c[1];
 499         if (!do_l)
 500             hsl_g[2] = hsl_c[2];
 501         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 502     } else {
 503         rgb_g[0] = SP_RGBA32_R_F(goal);
 504         rgb_g[1] = SP_RGBA32_G_F(goal);
 505         rgb_g[2] = SP_RGBA32_B_F(goal);
 506     }
 507
 508     for (int i = 0; i < 3; i++) {
 509         double d = rgb_g[i] - color[i];
 510         color[i] += d * force;
 511     }
 512 }
 513
 514 void
 515 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 516 {
 517     force = force*force; // in [0..1], this makes finer adjustments easier
 518
 519     float hsl_c[3];
 520     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 521
 522     if (do_h) {
 523         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 524         if (hsl_c[0] > 1)
 525             hsl_c[0] -= 1;
 526         if (hsl_c[0] < 0)
 527             hsl_c[0] += 1;
 528     }
 529     if (do_s) {
 530         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 531     }
 532     if (do_l) {
 533         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 534     }
 535
 536     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 537 }
 538
 539 void
 540 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 541 {
 542     if (mode == TWEAK_MODE_COLORPAINT) {
 543         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 544     } else if (mode == TWEAK_MODE_COLORJITTER) {
 545         tweak_colorjitter (color, force, do_h, do_s, do_l);
 546     }
 547 }
 548
 549 void
 550 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 551 {
 552     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 553
 554     if (mode == TWEAK_MODE_COLORPAINT) {
 555         double d = opacity_goal - opacity;
 556         opacity += d * force;
 557     } else if (mode == TWEAK_MODE_COLORJITTER) {
 558         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 559     }
 560
 561     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 562 }
 563
 564
 565 double
 566 tweak_profile (double dist, double radius)
 567 {
 568     if (radius == 0)
 569         return 0;
 570     double x = dist / radius;
 571     double alpha = 1;
 572     if (x >= 1) {
 573         return 0;
 574     } else if (x <= 0) {
 575         return 1;
 576     } else {
 577         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 578     }
 579 }
 580
 581 void
 582 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 583     guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,
 584     bool do_h, bool do_s, bool do_l, bool do_o)
 585 {
 586     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 587
 588     if (!gradient || !SP_IS_GRADIENT(gradient))
 589         return;
 590
 591     NR::Matrix i2d = sp_item_i2doc_affine (item);
 592     NR::Point p = p_w * i2d.inverse();
 593     p *= (gradient->gradientTransform).inverse();
 594     // now p is in gradient's original coordinates
 595
 596     double pos = 0;
 597     double r = 0;
 598     if (SP_IS_LINEARGRADIENT(gradient)) {
 599         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 600
 601         NR::Point p1(lg->x1.computed, lg->y1.computed);
 602         NR::Point p2(lg->x2.computed, lg->y2.computed);
 603         NR::Point pdiff(p2 - p1);
 604         double vl = NR::L2(pdiff);
 605
 606         // This is the matrix which moves and rotates the gradient line
 607         // so it's oriented along the X axis:
 608         NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));
 609
 610         // Transform the mouse point by it to find out its projection onto the gradient line:
 611         NR::Point pnorm = p * norm;
 612
 613         // Scale its X coordinate to match the length of the gradient line:
 614         pos = pnorm[NR::X] / vl;
 615         // Calculate radius in lenfth-of-gradient-line units
 616         r = radius / vl;
 617
 618     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 619         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 620         NR::Point c (rg->cx.computed, rg->cy.computed);
 621         pos = NR::L2(p - c) / rg->r.computed;
 622         r = radius / rg->r.computed;
 623     }
 624
 625     // Normalize pos to 0..1, taking into accound gradient spread:
 626     double pos_e = pos;
 627     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 628         if (pos > 1)
 629             pos_e = 1;
 630         if (pos < 0)
 631             pos_e = 0;
 632     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 633         if (pos > 1 || pos < 0)
 634             pos_e = pos - floor(pos);
 635     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 636         if (pos > 1 || pos < 0) {
 637             bool odd = ((int)(floor(pos)) % 2 == 1);
 638             pos_e = pos - floor(pos);
 639             if (odd)
 640                 pos_e = 1 - pos_e;
 641         }
 642     }
 643
 644     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 645
 646     double offset_l = 0;
 647     double offset_h = 0;
 648     SPObject *child_prev = NULL;
 649     for (SPObject *child = sp_object_first_child(vector);
 650          child != NULL; child = SP_OBJECT_NEXT(child)) {
 651         if (!SP_IS_STOP(child))
 652             continue;
 653         SPStop *stop = SP_STOP (child);
 654
 655         offset_h = stop->offset;
 656
 657         if (child_prev) {
 658
 659             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 660                 // the summit falls in this interstop, and the radius is small,
 661                 // so it only affects the ends of this interstop;
 662                 // distribute the force between the two endstops so that they
 663                 // get all the painting even if they are not touched by the brush
 664                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 665                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 666                                   do_h, do_s, do_l);
 667                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 668                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 669                                   do_h, do_s, do_l);
 670                 SP_OBJECT(stop)->updateRepr();
 671                 child_prev->updateRepr();
 672                 break;
 673             } else {
 674                 // wide brush, may affect more than 2 stops,
 675                 // paint each stop by the force from the profile curve
 676                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 677                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 678                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 679                                  do_h, do_s, do_l);
 680                     child_prev->updateRepr();
 681                 }
 682
 683                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 684                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 685                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 686                                  do_h, do_s, do_l);
 687                     SP_OBJECT(stop)->updateRepr();
 688                 }
 689             }
 690         }
 691
 692         offset_l = offset_h;
 693         child_prev = child;
 694     }
 695 }
 696
 697 bool
 698 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 699                           guint32 fill_goal, bool do_fill,
 700                           guint32 stroke_goal, bool do_stroke,
 701                           float opacity_goal, bool do_opacity,
 702                           NR::Point p, double radius, double force,
 703                           bool do_h, bool do_s, bool do_l, bool do_o)
 704 {
 705     bool did = false;
 706
 707     if (SP_IS_GROUP(item)) {
 708         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 709             if (SP_IS_ITEM(child)) {
 710                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 711                                           fill_goal, do_fill,
 712                                           stroke_goal, do_stroke,
 713                                           opacity_goal, do_opacity,
 714                                           p, radius, force, do_h, do_s, do_l, do_o));
 715                     did = true;
 716             }
 717         }
 718
 719     } else {
 720         SPStyle *style = SP_OBJECT_STYLE(item);
 721         if (!style) {
 722             return false;
 723         }
 724         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item),
 725                                                         SPItem::GEOMETRIC_BBOX);
 726         if (!bbox) {
 727             return false;
 728         }
 729
 730         NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));
 731
 732         NR::Point center = bbox->midpoint();
 733         double this_force;
 734
 735 // if item == item_at_point, use max force
 736         if (item == item_at_point) {
 737             this_force = force;
 738 // else if no overlap of bbox and brush box, skip:
 739         } else if (!bbox->intersects(brush)) {
 740             return false;
 741 //TODO:
 742 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 743         //} else if (bbox->maxExtent() > 3 * radius) {
 744         //}
 745 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 746 // else if still smaller, then check only the object center:
 747         } else {
 748             this_force = force * tweak_profile (NR::L2 (p - center), radius);
 749         }
 750
 751         if (this_force > 0.002) {
 752
 753             if (do_fill) {
 754                 if (style->fill.type == SP_PAINT_TYPE_COLOR) {
 755                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
 756                     item->updateRepr();
 757                     did = true;
 758                 } else if (style->fill.type == SP_PAINT_TYPE_PAINTSERVER) {
 759                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 760                     did = true;
 761                 }
 762             }
 763             if (do_stroke) {
 764                 if (style->stroke.type == SP_PAINT_TYPE_COLOR) {
 765                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
 766                     item->updateRepr();
 767                     did = true;
 768                 } else if (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER) {
 769                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 770                     did = true;
 771                 }
 772             }
 773             if (do_opacity && do_o) {
 774                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
 775             }
 776         }
 777     }
 778
 779     return did;
 780 }
 781
 782
 783 bool
 784 sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)
 785 {
 786     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 787
 788     if (selection->isEmpty()) {
 789         return false;
 790     }
 791
 792     bool did = false;
 793     double radius = get_dilate_radius(tc);
 794     double force = get_dilate_force(tc);
 795     if (radius == 0 || force == 0) {
 796         return false;
 797     }
 798     double color_force = MIN(sqrt(force)/4.0, 1);
 799
 800     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
 801     Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.tweak");
 802     SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
 803     if (tc->mode == TWEAK_MODE_COLORPAINT && !css)
 804         return false;
 805
 806     bool do_fill = false, do_stroke = false, do_opacity = false;
 807     guint32 fill_goal = 0, stroke_goal = 0;
 808     float opacity_goal = 1;
 809
 810     const gchar *fill_prop = sp_repr_css_property(css, "fill", NULL);
 811     if (fill_prop && strcmp(fill_prop, "none")) {
 812         do_fill = true;
 813         fill_goal = sp_svg_read_color(fill_prop, 0);
 814     }
 815     const gchar *stroke_prop = sp_repr_css_property(css, "stroke", NULL);
 816     if (stroke_prop && strcmp(stroke_prop, "none")) {
 817         do_stroke = true;
 818         stroke_goal = sp_svg_read_color(stroke_prop, 0);
 819     }
 820     const gchar *opacity_prop = sp_repr_css_property(css, "opacity", NULL);
 821     if (opacity_prop) {
 822         do_opacity = true;
 823         sp_svg_number_read_f(opacity_prop, &opacity_goal);
 824     }
 825
 826     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 827          items != NULL;
 828          items = items->next) {
 829
 830         SPItem *item = (SPItem *) items->data;
 831
 832         if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {
 833             if (do_fill || do_stroke || do_opacity) {
 834                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
 835                                           fill_goal, do_fill,
 836                                           stroke_goal, do_stroke,
 837                                           opacity_goal, do_opacity,
 838                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
 839                 did = true;
 840             }
 841         } else {
 842             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 843                 did = true;
 844         }
 845     }
 846
 847     return did;
 848 }
 849
 850 void
 851 sp_tweak_update_area (SPTweakContext *tc)
 852 {
 853         double radius = get_dilate_radius(tc);
 854         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 855         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 856         sp_canvas_item_show(tc->dilate_area);
 857 }
 858
 859 void
 860 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 861 {
 862     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 863     // need to set explicitly, because the prefs may not have changed by the previous
 864     tc->mode = mode;
 865     sp_tweak_update_cursor (tc, mode);
 866 }
 867
 868 void
 869 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 870 {
 871    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 872    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 873    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 874    // button has changed prefs, restore
 875    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 876    // changing prefs changed tc->mode, restore back :)
 877    tc->mode = mode;
 878    sp_tweak_update_cursor (tc, mode);
 879 }
 880
 881 gint
 882 sp_tweak_context_root_handler(SPEventContext *event_context,
 883                                   GdkEvent *event)
 884 {
 885     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 886     SPDesktop *desktop = event_context->desktop;
 887
 888     gint ret = FALSE;
 889
 890     switch (event->type) {
 891         case GDK_ENTER_NOTIFY:
 892             sp_canvas_item_show(tc->dilate_area);
 893             break;
 894         case GDK_LEAVE_NOTIFY:
 895             sp_canvas_item_hide(tc->dilate_area);
 896             break;
 897         case GDK_BUTTON_PRESS:
 898             if (event->button.button == 1 && !event_context->space_panning) {
 899
 900                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 901                     return TRUE;
 902                 }
 903
 904                 NR::Point const button_w(event->button.x,
 905                                          event->button.y);
 906                 NR::Point const button_dt(desktop->w2d(button_w));
 907                 tc->last_push = desktop->dt2doc(button_dt);
 908
 909                 sp_tweak_extinput(tc, event);
 910
 911                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 912                 tc->is_drawing = true;
 913                 tc->is_dilating = true;
 914                 tc->has_dilated = false;
 915
 916                 ret = TRUE;
 917             }
 918             break;
 919         case GDK_MOTION_NOTIFY:
 920         {
 921             NR::Point const motion_w(event->motion.x,
 922                                      event->motion.y);
 923             NR::Point motion_dt(desktop->w2d(motion_w));
 924             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 925             sp_tweak_extinput(tc, event);
 926
 927             // draw the dilating cursor
 928                 double radius = get_dilate_radius(tc);
 929                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 930                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 931                 sp_canvas_item_show(tc->dilate_area);
 932
 933                 guint num = 0;
 934                 if (!desktop->selection->isEmpty()) {
 935                     num = g_slist_length((GSList *) desktop->selection->itemList());
 936                 }
 937                 if (num == 0) {
 938                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Select objects</b> to tweak"));
 939                 } else {
 940                     switch (tc->mode) {
 941                         case TWEAK_MODE_PUSH:
 942                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 943                                                       _("<b>Pushing %d</b> selected object(s)"), num);
 944                            break;
 945                         case TWEAK_MODE_SHRINK:
 946                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 947                                                       _("<b>Shrinking %d</b> selected object(s)"), num);
 948                            break;
 949                         case TWEAK_MODE_GROW:
 950                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 951                                                       _("<b>Growing %d</b> selected object(s)"), num);
 952                            break;
 953                         case TWEAK_MODE_ATTRACT:
 954                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 955                                                       _("<b>Attracting %d</b> selected object(s)"), num);
 956                            break;
 957                         case TWEAK_MODE_REPEL:
 958                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 959                                                       _("<b>Repelling %d</b> selected object(s)"), num);
 960                            break;
 961                         case TWEAK_MODE_ROUGHEN:
 962                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 963                                                       _("<b>Roughening %d</b> selected object(s)"), num);
 964                         case TWEAK_MODE_COLORPAINT:
 965                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 966                                                       _("<b>Painting %d</b> selected object(s)"), num);
 967                            break;
 968                         case TWEAK_MODE_COLORJITTER:
 969                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 970                                                       _("<b>Jittering colors in %d</b> selected object(s)"), num);
 971                            break;
 972                     }
 973                 }
 974
 975
 976             // dilating:
 977             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
 978                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);
 979                 //tc->last_push = motion_doc;
 980                 tc->has_dilated = true;
 981                 // it's slow, so prevent clogging up with events
 982                 gobble_motion_events(GDK_BUTTON1_MASK);
 983                 return TRUE;
 984             }
 985
 986         }
 987         break;
 988
 989
 990     case GDK_BUTTON_RELEASE:
 991     {
 992         NR::Point const motion_w(event->button.x, event->button.y);
 993         NR::Point const motion_dt(desktop->w2d(motion_w));
 994
 995         sp_canvas_end_forced_full_redraws(desktop->canvas);
 996         tc->is_drawing = false;
 997
 998         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
 999             if (!tc->has_dilated) {
1000                 // if we did not rub, do a light tap
1001                 tc->pressure = 0.03;
1002                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));
1003             }
1004             tc->is_dilating = false;
1005             tc->has_dilated = false;
1006             switch (tc->mode) {
1007                 case TWEAK_MODE_PUSH:
1008                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1009                                      SP_VERB_CONTEXT_TWEAK, _("Push tweak"));
1010                     break;
1011                 case TWEAK_MODE_SHRINK:
1012                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1013                                      SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));
1014                     break;
1015                 case TWEAK_MODE_GROW:
1016                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1017                                      SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));
1018                     break;
1019                 case TWEAK_MODE_ATTRACT:
1020                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1021                                      SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));
1022                     break;
1023                 case TWEAK_MODE_REPEL:
1024                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1025                                      SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));
1026                     break;
1027                 case TWEAK_MODE_ROUGHEN:
1028                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1029                                      SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));
1030                     break;
1031                 case TWEAK_MODE_COLORPAINT:
1032                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1033                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1034                 case TWEAK_MODE_COLORJITTER:
1035                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1036                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1037                     break;
1038             }
1039         }
1040         break;
1041     }
1042
1043     case GDK_KEY_PRESS:
1044         switch (get_group0_keyval (&event->key)) {
1045         case GDK_p:
1046         case GDK_P:
1047         case GDK_1:
1048             if (MOD__SHIFT_ONLY) {
1049                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
1050                 ret = TRUE;
1051             }
1052             break;
1053         case GDK_s:
1054         case GDK_S:
1055         case GDK_2:
1056             if (MOD__SHIFT_ONLY) {
1057                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);
1058                 ret = TRUE;
1059             }
1060             break;
1061         case GDK_g:
1062         case GDK_G:
1063         case GDK_3:
1064             if (MOD__SHIFT_ONLY) {
1065                 sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);
1066                 ret = TRUE;
1067             }
1068             break;
1069         case GDK_a:
1070         case GDK_A:
1071         case GDK_4:
1072             if (MOD__SHIFT_ONLY) {
1073                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);
1074                 ret = TRUE;
1075             }
1076             break;
1077         case GDK_e:
1078         case GDK_E:
1079         case GDK_5:
1080             if (MOD__SHIFT_ONLY) {
1081                 sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);
1082                 ret = TRUE;
1083             }
1084             break;
1085         case GDK_r:
1086         case GDK_R:
1087         case GDK_6:
1088             if (MOD__SHIFT_ONLY) {
1089                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
1090                 ret = TRUE;
1091             }
1092             break;
1093         case GDK_c:
1094         case GDK_C:
1095         case GDK_7:
1096             if (MOD__SHIFT_ONLY) {
1097                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);
1098                 ret = TRUE;
1099             }
1100             break;
1101         case GDK_j:
1102         case GDK_J:
1103         case GDK_8:
1104             if (MOD__SHIFT_ONLY) {
1105                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);
1106                 ret = TRUE;
1107             }
1108             break;
1109
1110         case GDK_Up:
1111         case GDK_KP_Up:
1112             if (!MOD__CTRL_ONLY) {
1113                 tc->force += 0.05;
1114                 if (tc->force > 1.0)
1115                     tc->force = 1.0;
1116                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1117                 ret = TRUE;
1118             }
1119             break;
1120         case GDK_Down:
1121         case GDK_KP_Down:
1122             if (!MOD__CTRL_ONLY) {
1123                 tc->force -= 0.05;
1124                 if (tc->force < 0.0)
1125                     tc->force = 0.0;
1126                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1127                 ret = TRUE;
1128             }
1129             break;
1130         case GDK_Right:
1131         case GDK_KP_Right:
1132             if (!MOD__CTRL_ONLY) {
1133                 tc->width += 0.01;
1134                 if (tc->width > 1.0)
1135                     tc->width = 1.0;
1136                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1137                 sp_tweak_update_area(tc);
1138                 ret = TRUE;
1139             }
1140             break;
1141         case GDK_Left:
1142         case GDK_KP_Left:
1143             if (!MOD__CTRL_ONLY) {
1144                 tc->width -= 0.01;
1145                 if (tc->width < 0.01)
1146                     tc->width = 0.01;
1147                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1148                 sp_tweak_update_area(tc);
1149                 ret = TRUE;
1150             }
1151             break;
1152         case GDK_Home:
1153         case GDK_KP_Home:
1154             tc->width = 0.01;
1155             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1156             sp_tweak_update_area(tc);
1157             ret = TRUE;
1158             break;
1159         case GDK_End:
1160         case GDK_KP_End:
1161             tc->width = 1.0;
1162             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1163             sp_tweak_update_area(tc);
1164             ret = TRUE;
1165             break;
1166         case GDK_x:
1167         case GDK_X:
1168             if (MOD__ALT_ONLY) {
1169                 desktop->setToolboxFocusTo ("altx-tweak");
1170                 ret = TRUE;
1171             }
1172             break;
1173
1174         case GDK_Control_L:
1175         case GDK_Control_R:
1176             if (MOD__SHIFT) {
1177                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1178             } else {
1179                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1180             }
1181             break;
1182         case GDK_Shift_L:
1183         case GDK_Shift_R:
1184             if (MOD__CTRL) {
1185                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1186             }
1187             break;
1188         default:
1189             break;
1190         }
1191         break;
1192
1193     case GDK_KEY_RELEASE:
1194         switch (get_group0_keyval(&event->key)) {
1195             case GDK_Control_L:
1196             case GDK_Control_R:
1197                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1198                 tc->_message_context->clear();
1199                 break;
1200             case GDK_Shift_L:
1201             case GDK_Shift_R:
1202                 if (MOD__CTRL) {
1203                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1204                 }
1205                 break;
1206             break;
1207             default:
1208                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1209                 break;
1210         }
1211
1212     default:
1213         break;
1214     }
1215
1216     if (!ret) {
1217         if (((SPEventContextClass *) parent_class)->root_handler) {
1218             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1219         }
1220     }
1221
1222     return ret;
1223 }
1224
1225
1226 /*
1227   Local Variables:
1228   mode:c++
1229   c-file-style:"stroustrup"
1230   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1231   indent-tabs-mode:nil
1232   fill-column:99
1233   End:
1234 */
1235 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :