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 "display/curve.h"
  71 #include "livarot/Shape.h"
  72 #include "2geom/isnan.h"
  73 #include "prefs-utils.h"
  74 #include "style.h"
  75 #include "box3d.h"
  76
  77 #include "tweak-context.h"
  78
  79 #define DDC_RED_RGBA 0xff0000ff
  80
  81 #define DYNA_MIN_WIDTH 1.0e-6
  82
  83 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  84 static void sp_tweak_context_init(SPTweakContext *ddc);
  85 static void sp_tweak_context_dispose(GObject *object);
  86
  87 static void sp_tweak_context_setup(SPEventContext *ec);
  88 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  89 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
  90
  91 static SPEventContextClass *parent_class;
  92
  93 GtkType
  94 sp_tweak_context_get_type(void)
  95 {
  96     static GType type = 0;
  97     if (!type) {
  98         GTypeInfo info = {
  99             sizeof(SPTweakContextClass),
 100             NULL, NULL,
 101             (GClassInitFunc) sp_tweak_context_class_init,
 102             NULL, NULL,
 103             sizeof(SPTweakContext),
 104             4,
 105             (GInstanceInitFunc) sp_tweak_context_init,
 106             NULL,   /* value_table */
 107         };
 108         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 109     }
 110     return type;
 111 }
 112
 113 static void
 114 sp_tweak_context_class_init(SPTweakContextClass *klass)
 115 {
 116     GObjectClass *object_class = (GObjectClass *) klass;
 117     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 118
 119     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 120
 121     object_class->dispose = sp_tweak_context_dispose;
 122
 123     event_context_class->setup = sp_tweak_context_setup;
 124     event_context_class->set = sp_tweak_context_set;
 125     event_context_class->root_handler = sp_tweak_context_root_handler;
 126 }
 127
 128 static void
 129 sp_tweak_context_init(SPTweakContext *tc)
 130 {
 131     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 132
 133     event_context->cursor_shape = cursor_push_xpm;
 134     event_context->hot_x = 4;
 135     event_context->hot_y = 4;
 136
 137     /* attributes */
 138     tc->dragging = FALSE;
 139
 140     tc->width = 0.2;
 141     tc->force = 0.2;
 142     tc->pressure = TC_DEFAULT_PRESSURE;
 143
 144     tc->is_dilating = false;
 145     tc->has_dilated = false;
 146
 147     tc->do_h = true;
 148     tc->do_s = true;
 149     tc->do_l = true;
 150     tc->do_o = false;
 151
 152     new (&tc->style_set_connection) sigc::connection();
 153 }
 154
 155 static void
 156 sp_tweak_context_dispose(GObject *object)
 157 {
 158     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 159
 160     tc->style_set_connection.disconnect();
 161     tc->style_set_connection.~connection();
 162
 163     if (tc->dilate_area) {
 164         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 165         tc->dilate_area = NULL;
 166     }
 167
 168     if (tc->_message_context) {
 169         delete tc->_message_context;
 170     }
 171
 172     G_OBJECT_CLASS(parent_class)->dispose(object);
 173 }
 174
 175 void
 176 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 177 {
 178     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 179    switch (mode) {
 180        case TWEAK_MODE_PUSH:
 181            event_context->cursor_shape = cursor_push_xpm;
 182            break;
 183        case TWEAK_MODE_SHRINK:
 184            event_context->cursor_shape = cursor_thin_xpm;
 185            break;
 186        case TWEAK_MODE_GROW:
 187            event_context->cursor_shape = cursor_thicken_xpm;
 188            break;
 189        case TWEAK_MODE_ATTRACT:
 190            event_context->cursor_shape = cursor_attract_xpm;
 191            break;
 192        case TWEAK_MODE_REPEL:
 193            event_context->cursor_shape = cursor_repel_xpm;
 194            break;
 195        case TWEAK_MODE_ROUGHEN:
 196            event_context->cursor_shape = cursor_roughen_xpm;
 197            break;
 198        case TWEAK_MODE_COLORPAINT:
 199        case TWEAK_MODE_COLORJITTER:
 200            event_context->cursor_shape = cursor_color_xpm;
 201            break;
 202    }
 203    sp_event_context_update_cursor(event_context);
 204 }
 205
 206 static bool
 207 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 208 {
 209     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 210         // we cannot store properties with uris
 211         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 212
 213         sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");
 214
 215         return true;
 216     }
 217     return false;
 218 }
 219
 220
 221 static void
 222 sp_tweak_context_setup(SPEventContext *ec)
 223 {
 224     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 225
 226     if (((SPEventContextClass *) parent_class)->setup)
 227         ((SPEventContextClass *) parent_class)->setup(ec);
 228
 229     {
 230         /* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */
 231         SPCurve *c = new SPCurve();
 232         const double C1 = 0.552;
 233         c->moveto(-1,0);
 234         c->curveto(-1, C1, -C1, 1, 0, 1 );
 235         c->curveto(C1, 1, 1, C1, 1, 0 );
 236         c->curveto(1, -C1, C1, -1, 0, -1 );
 237         c->curveto(-C1, -1, -1, -C1, -1, 0 );
 238         c->closepath();
 239         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 240         c->unref();
 241         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 242         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 243         sp_canvas_item_hide(tc->dilate_area);
 244     }
 245
 246     sp_event_context_read(ec, "width");
 247     sp_event_context_read(ec, "mode");
 248     sp_event_context_read(ec, "fidelity");
 249     sp_event_context_read(ec, "force");
 250     sp_event_context_read(ec, "usepressure");
 251     sp_event_context_read(ec, "doh");
 252     sp_event_context_read(ec, "dol");
 253     sp_event_context_read(ec, "dos");
 254     sp_event_context_read(ec, "doo");
 255
 256     tc->is_drawing = false;
 257
 258     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 259
 260     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 261         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 262     );
 263
 264     if (prefs_get_int_attribute("tools.tweak", "selcue", 0) != 0) {
 265         ec->enableSelectionCue();
 266     }
 267
 268     if (prefs_get_int_attribute("tools.tweak", "gradientdrag", 0) != 0) {
 269         ec->enableGrDrag();
 270     }
 271 }
 272
 273 static void
 274 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 275 {
 276     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 277
 278     if (!strcmp(key, "width")) {
 279         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 280         tc->width = CLAMP(dval, -1000.0, 1000.0);
 281     } else if (!strcmp(key, "mode")) {
 282         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 283         tc->mode = dval;
 284         sp_tweak_update_cursor(tc, tc->mode);
 285     } else if (!strcmp(key, "fidelity")) {
 286         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 287         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 288     } else if (!strcmp(key, "force")) {
 289         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 290         tc->force = CLAMP(dval, 0, 1.0);
 291     } else if (!strcmp(key, "usepressure")) {
 292         tc->usepressure = (val && strcmp(val, "0"));
 293     } else if (!strcmp(key, "doh")) {
 294         tc->do_h = (val && strcmp(val, "0"));
 295     } else if (!strcmp(key, "dos")) {
 296         tc->do_s = (val && strcmp(val, "0"));
 297     } else if (!strcmp(key, "dol")) {
 298         tc->do_l = (val && strcmp(val, "0"));
 299     } else if (!strcmp(key, "doo")) {
 300         tc->do_o = (val && strcmp(val, "0"));
 301     }
 302 }
 303
 304 static void
 305 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 306 {
 307     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 308         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 309     else
 310         tc->pressure = TC_DEFAULT_PRESSURE;
 311 }
 312
 313 double
 314 get_dilate_radius (SPTweakContext *tc)
 315 {
 316     // 10 times the pen width:
 317     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 318 }
 319
 320 double
 321 get_dilate_force (SPTweakContext *tc)
 322 {
 323     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 324         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 325     if (force > 3) {
 326         force += 4 * (force - 3);
 327     }
 328     return force * tc->force;
 329 }
 330
 331 bool
 332 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 333 {
 334     bool did = false;
 335
 336     if (SP_IS_BOX3D(item)) {
 337         // convert 3D boxes to ordinary groups before tweaking their shapes
 338         item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));
 339         selection->add(item);
 340     }
 341
 342     if (SP_IS_GROUP(item)) {
 343         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 344             if (SP_IS_ITEM(child)) {
 345                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 346                     did = true;
 347             }
 348         }
 349
 350     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 351
 352         Inkscape::XML::Node *newrepr = NULL;
 353         gint pos = 0;
 354         Inkscape::XML::Node *parent = NULL;
 355         char const *id = NULL;
 356         if (!SP_IS_PATH(item)) {
 357             newrepr = sp_selected_item_to_curved_repr(item, 0);
 358             if (!newrepr)
 359                 return false;
 360
 361             // remember the position of the item
 362             pos = SP_OBJECT_REPR(item)->position();
 363             // remember parent
 364             parent = SP_OBJECT_REPR(item)->parent();
 365             // remember id
 366             id = SP_OBJECT_REPR(item)->attribute("id");
 367         }
 368
 369
 370         // skip those paths whose bboxes are entirely out of reach with our radius
 371         NR::Maybe<NR::Rect> bbox = item->getBounds(from_2geom(sp_item_i2doc_affine(item)));
 372         if (bbox) {
 373             bbox->growBy(radius);
 374             if (!bbox->contains(p)) {
 375                 return false;
 376             }
 377         }
 378
 379         Path *orig = Path_for_item(item, false);
 380         if (orig == NULL) {
 381             return false;
 382         }
 383
 384         Path *res = new Path;
 385         res->SetBackData(false);
 386
 387         Shape *theShape = new Shape;
 388         Shape *theRes = new Shape;
 389         NR::Matrix i2doc(from_2geom(sp_item_i2doc_affine(item)));
 390
 391         orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / NR::expansion(i2doc)); // default 0.059
 392         orig->Fill(theShape, 0);
 393
 394         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 395         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 396         if (val && strcmp(val, "nonzero") == 0)
 397         {
 398             theRes->ConvertToShape(theShape, fill_nonZero);
 399         }
 400         else if (val && strcmp(val, "evenodd") == 0)
 401         {
 402             theRes->ConvertToShape(theShape, fill_oddEven);
 403         }
 404         else
 405         {
 406             theRes->ConvertToShape(theShape, fill_nonZero);
 407         }
 408
 409         if (NR::L2(vector) != 0)
 410             vector = 1/NR::L2(vector) * vector;
 411
 412         bool did_this = false;
 413         if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {
 414             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 415                                  mode == TWEAK_MODE_GROW? force : -force,
 416                                  join_straight, 4.0,
 417                                  true, p, NR::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 418               did_this = true;
 419         } else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {
 420             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 421                                  mode == TWEAK_MODE_REPEL? force : -force,
 422                                  join_straight, 4.0,
 423                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 424               did_this = true;
 425         } else if (mode == TWEAK_MODE_PUSH) {
 426             if (theShape->MakeTweak(tweak_mode_push, theRes,
 427                                  1.0,
 428                                  join_straight, 4.0,
 429                                  true, p, force*2*vector, radius, &i2doc) == 0)
 430               did_this = true;
 431         } else if (mode == TWEAK_MODE_ROUGHEN) {
 432             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 433                                  force,
 434                                  join_straight, 4.0,
 435                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 436               did_this = true;
 437         }
 438
 439         // the rest only makes sense if we actually changed the path
 440         if (did_this) {
 441             theRes->ConvertToShape(theShape, fill_positive);
 442
 443             res->Reset();
 444             theRes->ConvertToForme(res);
 445
 446             double th_max = (0.6 - 0.59*sqrt(fidelity)) / NR::expansion(i2doc);
 447             double threshold = MAX(th_max, th_max*force);
 448             res->ConvertEvenLines(threshold);
 449             res->Simplify(threshold / (SP_ACTIVE_DESKTOP->current_zoom()));
 450
 451             if (newrepr) { // converting to path, need to replace the repr
 452                 bool is_selected = selection->includes(item);
 453                 if (is_selected)
 454                     selection->remove(item);
 455
 456                 // It's going to resurrect, so we delete without notifying listeners.
 457                 SP_OBJECT(item)->deleteObject(false);
 458
 459                 // restore id
 460                 newrepr->setAttribute("id", id);
 461                 // add the new repr to the parent
 462                 parent->appendChild(newrepr);
 463                 // move to the saved position
 464                 newrepr->setPosition(pos > 0 ? pos : 0);
 465
 466                 if (is_selected)
 467                     selection->add(newrepr);
 468             }
 469
 470             if (res->descr_cmd.size() > 1) {
 471                 gchar *str = res->svg_dump_path();
 472                 if (newrepr) {
 473                     newrepr->setAttribute("d", str);
 474                 } else {
 475                     if (SP_IS_LPE_ITEM(item) && sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(item))) {
 476                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 477                     } else {
 478                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 479                     }
 480                 }
 481                 g_free(str);
 482             } else {
 483                 // TODO: if there's 0 or 1 node left, delete this path altogether
 484             }
 485
 486             if (newrepr) {
 487                 Inkscape::GC::release(newrepr);
 488                 newrepr = NULL;
 489             }
 490         }
 491
 492         delete theShape;
 493         delete theRes;
 494         delete orig;
 495         delete res;
 496
 497         if (did_this)
 498             did = true;
 499     }
 500
 501     return did;
 502 }
 503
 504 void
 505 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 506 {
 507     float rgb_g[3];
 508
 509     if (!do_h || !do_s || !do_l) {
 510         float hsl_g[3];
 511         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 512         float hsl_c[3];
 513         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 514         if (!do_h)
 515             hsl_g[0] = hsl_c[0];
 516         if (!do_s)
 517             hsl_g[1] = hsl_c[1];
 518         if (!do_l)
 519             hsl_g[2] = hsl_c[2];
 520         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 521     } else {
 522         rgb_g[0] = SP_RGBA32_R_F(goal);
 523         rgb_g[1] = SP_RGBA32_G_F(goal);
 524         rgb_g[2] = SP_RGBA32_B_F(goal);
 525     }
 526
 527     for (int i = 0; i < 3; i++) {
 528         double d = rgb_g[i] - color[i];
 529         color[i] += d * force;
 530     }
 531 }
 532
 533 void
 534 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 535 {
 536     float hsl_c[3];
 537     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 538
 539     if (do_h) {
 540         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 541         if (hsl_c[0] > 1)
 542             hsl_c[0] -= 1;
 543         if (hsl_c[0] < 0)
 544             hsl_c[0] += 1;
 545     }
 546     if (do_s) {
 547         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 548     }
 549     if (do_l) {
 550         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 551     }
 552
 553     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 554 }
 555
 556 void
 557 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 558 {
 559     if (mode == TWEAK_MODE_COLORPAINT) {
 560         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 561     } else if (mode == TWEAK_MODE_COLORJITTER) {
 562         tweak_colorjitter (color, force, do_h, do_s, do_l);
 563     }
 564 }
 565
 566 void
 567 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 568 {
 569     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 570
 571     if (mode == TWEAK_MODE_COLORPAINT) {
 572         double d = opacity_goal - opacity;
 573         opacity += d * force;
 574     } else if (mode == TWEAK_MODE_COLORJITTER) {
 575         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 576     }
 577
 578     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 579 }
 580
 581
 582 double
 583 tweak_profile (double dist, double radius)
 584 {
 585     if (radius == 0)
 586         return 0;
 587     double x = dist / radius;
 588     double alpha = 1;
 589     if (x >= 1) {
 590         return 0;
 591     } else if (x <= 0) {
 592         return 1;
 593     } else {
 594         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 595     }
 596 }
 597
 598 void
 599 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 600                           guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,
 601                           bool do_h, bool do_s, bool do_l, bool /*do_o*/)
 602 {
 603     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 604
 605     if (!gradient || !SP_IS_GRADIENT(gradient))
 606         return;
 607
 608     NR::Matrix i2d = from_2geom(sp_item_i2doc_affine (item));
 609     NR::Point p = p_w * i2d.inverse();
 610     p *= (gradient->gradientTransform).inverse();
 611     // now p is in gradient's original coordinates
 612
 613     double pos = 0;
 614     double r = 0;
 615     if (SP_IS_LINEARGRADIENT(gradient)) {
 616         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 617
 618         NR::Point p1(lg->x1.computed, lg->y1.computed);
 619         NR::Point p2(lg->x2.computed, lg->y2.computed);
 620         NR::Point pdiff(p2 - p1);
 621         double vl = NR::L2(pdiff);
 622
 623         // This is the matrix which moves and rotates the gradient line
 624         // so it's oriented along the X axis:
 625         NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));
 626
 627         // Transform the mouse point by it to find out its projection onto the gradient line:
 628         NR::Point pnorm = p * norm;
 629
 630         // Scale its X coordinate to match the length of the gradient line:
 631         pos = pnorm[NR::X] / vl;
 632         // Calculate radius in lenfth-of-gradient-line units
 633         r = radius / vl;
 634
 635     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 636         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 637         NR::Point c (rg->cx.computed, rg->cy.computed);
 638         pos = NR::L2(p - c) / rg->r.computed;
 639         r = radius / rg->r.computed;
 640     }
 641
 642     // Normalize pos to 0..1, taking into accound gradient spread:
 643     double pos_e = pos;
 644     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 645         if (pos > 1)
 646             pos_e = 1;
 647         if (pos < 0)
 648             pos_e = 0;
 649     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 650         if (pos > 1 || pos < 0)
 651             pos_e = pos - floor(pos);
 652     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 653         if (pos > 1 || pos < 0) {
 654             bool odd = ((int)(floor(pos)) % 2 == 1);
 655             pos_e = pos - floor(pos);
 656             if (odd)
 657                 pos_e = 1 - pos_e;
 658         }
 659     }
 660
 661     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 662
 663     double offset_l = 0;
 664     double offset_h = 0;
 665     SPObject *child_prev = NULL;
 666     for (SPObject *child = sp_object_first_child(vector);
 667          child != NULL; child = SP_OBJECT_NEXT(child)) {
 668         if (!SP_IS_STOP(child))
 669             continue;
 670         SPStop *stop = SP_STOP (child);
 671
 672         offset_h = stop->offset;
 673
 674         if (child_prev) {
 675
 676             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 677                 // the summit falls in this interstop, and the radius is small,
 678                 // so it only affects the ends of this interstop;
 679                 // distribute the force between the two endstops so that they
 680                 // get all the painting even if they are not touched by the brush
 681                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 682                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 683                                   do_h, do_s, do_l);
 684                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 685                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 686                                   do_h, do_s, do_l);
 687                 SP_OBJECT(stop)->updateRepr();
 688                 child_prev->updateRepr();
 689                 break;
 690             } else {
 691                 // wide brush, may affect more than 2 stops,
 692                 // paint each stop by the force from the profile curve
 693                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 694                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 695                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 696                                  do_h, do_s, do_l);
 697                     child_prev->updateRepr();
 698                 }
 699
 700                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 701                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 702                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 703                                  do_h, do_s, do_l);
 704                     SP_OBJECT(stop)->updateRepr();
 705                 }
 706             }
 707         }
 708
 709         offset_l = offset_h;
 710         child_prev = child;
 711     }
 712 }
 713
 714 bool
 715 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 716                           guint32 fill_goal, bool do_fill,
 717                           guint32 stroke_goal, bool do_stroke,
 718                           float opacity_goal, bool do_opacity,
 719                           NR::Point p, double radius, double force,
 720                           bool do_h, bool do_s, bool do_l, bool do_o)
 721 {
 722     bool did = false;
 723
 724     if (SP_IS_GROUP(item)) {
 725         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 726             if (SP_IS_ITEM(child)) {
 727                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 728                                           fill_goal, do_fill,
 729                                           stroke_goal, do_stroke,
 730                                           opacity_goal, do_opacity,
 731                                           p, radius, force, do_h, do_s, do_l, do_o))
 732                     did = true;
 733             }
 734         }
 735
 736     } else {
 737         SPStyle *style = SP_OBJECT_STYLE(item);
 738         if (!style) {
 739             return false;
 740         }
 741         NR::Maybe<NR::Rect> bbox = item->getBounds(from_2geom(sp_item_i2doc_affine(item)),
 742                                                         SPItem::GEOMETRIC_BBOX);
 743         if (!bbox) {
 744             return false;
 745         }
 746
 747         NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));
 748
 749         NR::Point center = bbox->midpoint();
 750         double this_force;
 751
 752 // if item == item_at_point, use max force
 753         if (item == item_at_point) {
 754             this_force = force;
 755 // else if no overlap of bbox and brush box, skip:
 756         } else if (!bbox->intersects(brush)) {
 757             return false;
 758 //TODO:
 759 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 760         //} else if (bbox->maxExtent() > 3 * radius) {
 761         //}
 762 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 763 // else if still smaller, then check only the object center:
 764         } else {
 765             this_force = force * tweak_profile (NR::L2 (p - center), radius);
 766         }
 767
 768         if (this_force > 0.002) {
 769
 770             if (do_fill) {
 771                 if (style->fill.isPaintserver()) {
 772                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 773                     did = true;
 774                 } else if (style->fill.isColor()) {
 775                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
 776                     item->updateRepr();
 777                     did = true;
 778                 }
 779             }
 780             if (do_stroke) {
 781                 if (style->stroke.isPaintserver()) {
 782                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 783                     did = true;
 784                 } else if (style->stroke.isColor()) {
 785                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
 786                     item->updateRepr();
 787                     did = true;
 788                 }
 789             }
 790             if (do_opacity && do_o) {
 791                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
 792             }
 793         }
 794     }
 795
 796     return did;
 797 }
 798
 799
 800 bool
 801 sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)
 802 {
 803     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 804     SPDesktop *desktop = SP_EVENT_CONTEXT(tc)->desktop;
 805
 806     if (selection->isEmpty()) {
 807         return false;
 808     }
 809
 810     bool did = false;
 811     double radius = get_dilate_radius(tc);
 812     double force = get_dilate_force(tc);
 813     if (radius == 0 || force == 0) {
 814         return false;
 815     }
 816     double color_force = MIN(sqrt(force)/20.0, 1);
 817
 818     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
 819
 820     bool do_fill = false, do_stroke = false, do_opacity = false;
 821     guint32 fill_goal = sp_desktop_get_color_tool(desktop, "tools.tweak", true, &do_fill);
 822     guint32 stroke_goal = sp_desktop_get_color_tool(desktop, "tools.tweak", false, &do_stroke);
 823     double opacity_goal = sp_desktop_get_master_opacity_tool(desktop, "tools.tweak", &do_opacity);
 824
 825     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 826          items != NULL;
 827          items = items->next) {
 828
 829         SPItem *item = (SPItem *) items->data;
 830
 831         if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {
 832             if (do_fill || do_stroke || do_opacity) {
 833                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
 834                                           fill_goal, do_fill,
 835                                           stroke_goal, do_stroke,
 836                                           opacity_goal, do_opacity,
 837                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
 838                 did = true;
 839             }
 840         } else {
 841             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 842                 did = true;
 843         }
 844     }
 845
 846     return did;
 847 }
 848
 849 void
 850 sp_tweak_update_area (SPTweakContext *tc)
 851 {
 852         double radius = get_dilate_radius(tc);
 853         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 854         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 855         sp_canvas_item_show(tc->dilate_area);
 856 }
 857
 858 void
 859 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 860 {
 861     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 862     // need to set explicitly, because the prefs may not have changed by the previous
 863     tc->mode = mode;
 864     sp_tweak_update_cursor (tc, mode);
 865 }
 866
 867 void
 868 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 869 {
 870    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 871    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 872    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 873    // button has changed prefs, restore
 874    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 875    // changing prefs changed tc->mode, restore back :)
 876    tc->mode = mode;
 877    sp_tweak_update_cursor (tc, mode);
 878 }
 879
 880 gint
 881 sp_tweak_context_root_handler(SPEventContext *event_context,
 882                                   GdkEvent *event)
 883 {
 884     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 885     SPDesktop *desktop = event_context->desktop;
 886
 887     gint ret = FALSE;
 888
 889     switch (event->type) {
 890         case GDK_ENTER_NOTIFY:
 891             sp_canvas_item_show(tc->dilate_area);
 892             break;
 893         case GDK_LEAVE_NOTIFY:
 894             sp_canvas_item_hide(tc->dilate_area);
 895             break;
 896         case GDK_BUTTON_PRESS:
 897             if (event->button.button == 1 && !event_context->space_panning) {
 898
 899                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 900                     return TRUE;
 901                 }
 902
 903                 NR::Point const button_w(event->button.x,
 904                                          event->button.y);
 905                 NR::Point const button_dt(desktop->w2d(button_w));
 906                 tc->last_push = desktop->dt2doc(button_dt);
 907
 908                 sp_tweak_extinput(tc, event);
 909
 910                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 911                 tc->is_drawing = true;
 912                 tc->is_dilating = true;
 913                 tc->has_dilated = false;
 914
 915                 ret = TRUE;
 916             }
 917             break;
 918         case GDK_MOTION_NOTIFY:
 919         {
 920             NR::Point const motion_w(event->motion.x,
 921                                      event->motion.y);
 922             NR::Point motion_dt(desktop->w2d(motion_w));
 923             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 924             sp_tweak_extinput(tc, event);
 925
 926             // draw the dilating cursor
 927                 double radius = get_dilate_radius(tc);
 928                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 929                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 930                 sp_canvas_item_show(tc->dilate_area);
 931
 932                 guint num = 0;
 933                 if (!desktop->selection->isEmpty()) {
 934                     num = g_slist_length((GSList *) desktop->selection->itemList());
 935                 }
 936                 if (num == 0) {
 937                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
 938                 } else {
 939                     switch (tc->mode) {
 940                         case TWEAK_MODE_PUSH:
 941                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 942                                                       ngettext("<b>Pushing %d</b> selected object",
 943                                                       "<b>Pushing %d</b> selected objects", num), num);
 944                            break;
 945                         case TWEAK_MODE_SHRINK:
 946                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 947                                                       ngettext("<b>Shrinking %d</b> selected object",
 948                                                       "<b>Shrinking %d</b> selected objects", num), num);
 949                            break;
 950                         case TWEAK_MODE_GROW:
 951                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 952                                                       ngettext("<b>Growing %d</b> selected object",
 953                                                       "<b>Growing %d</b> selected objects", num), num);
 954                            break;
 955                         case TWEAK_MODE_ATTRACT:
 956                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 957                                                       ngettext("<b>Attracting %d</b> selected object",
 958                                                       "<b>Attracting %d</b> selected objects", num), num);
 959                            break;
 960                         case TWEAK_MODE_REPEL:
 961                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 962                                                       ngettext("<b>Repelling %d</b> selected object",
 963                                                       "<b>Repelling %d</b> selected objects", num), num);
 964                            break;
 965                         case TWEAK_MODE_ROUGHEN:
 966                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 967                                                       ngettext("<b>Roughening %d</b> selected object",
 968                                                       "<b>Roughening %d</b> selected objects", num), num);
 969                            break;
 970                         case TWEAK_MODE_COLORPAINT:
 971                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 972                                                       ngettext("<b>Painting %d</b> selected object",
 973                                                       "<b>Painting %d</b> selected objects", num), num);
 974                            break;
 975                         case TWEAK_MODE_COLORJITTER:
 976                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 977                                                       ngettext("<b>Jittering colors in %d</b> selected object",
 978                                                       "<b>Jittering colors in %d</b> selected objects", num), num);
 979                            break;
 980                     }
 981                 }
 982
 983
 984             // dilating:
 985             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
 986                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);
 987                 //tc->last_push = motion_doc;
 988                 tc->has_dilated = true;
 989                 // it's slow, so prevent clogging up with events
 990                 gobble_motion_events(GDK_BUTTON1_MASK);
 991                 return TRUE;
 992             }
 993
 994         }
 995         break;
 996
 997
 998     case GDK_BUTTON_RELEASE:
 999     {
1000         NR::Point const motion_w(event->button.x, event->button.y);
1001         NR::Point const motion_dt(desktop->w2d(motion_w));
1002
1003         sp_canvas_end_forced_full_redraws(desktop->canvas);
1004         tc->is_drawing = false;
1005
1006         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1007             if (!tc->has_dilated) {
1008                 // if we did not rub, do a light tap
1009                 tc->pressure = 0.03;
1010                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));
1011             }
1012             tc->is_dilating = false;
1013             tc->has_dilated = false;
1014             switch (tc->mode) {
1015                 case TWEAK_MODE_PUSH:
1016                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1017                                      SP_VERB_CONTEXT_TWEAK, _("Push tweak"));
1018                     break;
1019                 case TWEAK_MODE_SHRINK:
1020                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1021                                      SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));
1022                     break;
1023                 case TWEAK_MODE_GROW:
1024                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1025                                      SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));
1026                     break;
1027                 case TWEAK_MODE_ATTRACT:
1028                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1029                                      SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));
1030                     break;
1031                 case TWEAK_MODE_REPEL:
1032                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1033                                      SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));
1034                     break;
1035                 case TWEAK_MODE_ROUGHEN:
1036                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1037                                      SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));
1038                     break;
1039                 case TWEAK_MODE_COLORPAINT:
1040                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1041                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1042                     break;
1043                 case TWEAK_MODE_COLORJITTER:
1044                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1045                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1046                     break;
1047             }
1048         }
1049         break;
1050     }
1051
1052     case GDK_KEY_PRESS:
1053         switch (get_group0_keyval (&event->key)) {
1054         case GDK_p:
1055         case GDK_P:
1056         case GDK_1:
1057             if (MOD__SHIFT_ONLY) {
1058                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
1059                 ret = TRUE;
1060             }
1061             break;
1062         case GDK_s:
1063         case GDK_S:
1064         case GDK_2:
1065             if (MOD__SHIFT_ONLY) {
1066                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);
1067                 ret = TRUE;
1068             }
1069             break;
1070         case GDK_g:
1071         case GDK_G:
1072         case GDK_3:
1073             if (MOD__SHIFT_ONLY) {
1074                 sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);
1075                 ret = TRUE;
1076             }
1077             break;
1078         case GDK_a:
1079         case GDK_A:
1080         case GDK_4:
1081             if (MOD__SHIFT_ONLY) {
1082                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);
1083                 ret = TRUE;
1084             }
1085             break;
1086         case GDK_e:
1087         case GDK_E:
1088         case GDK_5:
1089             if (MOD__SHIFT_ONLY) {
1090                 sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);
1091                 ret = TRUE;
1092             }
1093             break;
1094         case GDK_r:
1095         case GDK_R:
1096         case GDK_6:
1097             if (MOD__SHIFT_ONLY) {
1098                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
1099                 ret = TRUE;
1100             }
1101             break;
1102         case GDK_c:
1103         case GDK_C:
1104         case GDK_7:
1105             if (MOD__SHIFT_ONLY) {
1106                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);
1107                 ret = TRUE;
1108             }
1109             break;
1110         case GDK_j:
1111         case GDK_J:
1112         case GDK_8:
1113             if (MOD__SHIFT_ONLY) {
1114                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);
1115                 ret = TRUE;
1116             }
1117             break;
1118
1119         case GDK_Up:
1120         case GDK_KP_Up:
1121             if (!MOD__CTRL_ONLY) {
1122                 tc->force += 0.05;
1123                 if (tc->force > 1.0)
1124                     tc->force = 1.0;
1125                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1126                 ret = TRUE;
1127             }
1128             break;
1129         case GDK_Down:
1130         case GDK_KP_Down:
1131             if (!MOD__CTRL_ONLY) {
1132                 tc->force -= 0.05;
1133                 if (tc->force < 0.0)
1134                     tc->force = 0.0;
1135                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1136                 ret = TRUE;
1137             }
1138             break;
1139         case GDK_Right:
1140         case GDK_KP_Right:
1141             if (!MOD__CTRL_ONLY) {
1142                 tc->width += 0.01;
1143                 if (tc->width > 1.0)
1144                     tc->width = 1.0;
1145                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1146                 sp_tweak_update_area(tc);
1147                 ret = TRUE;
1148             }
1149             break;
1150         case GDK_Left:
1151         case GDK_KP_Left:
1152             if (!MOD__CTRL_ONLY) {
1153                 tc->width -= 0.01;
1154                 if (tc->width < 0.01)
1155                     tc->width = 0.01;
1156                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1157                 sp_tweak_update_area(tc);
1158                 ret = TRUE;
1159             }
1160             break;
1161         case GDK_Home:
1162         case GDK_KP_Home:
1163             tc->width = 0.01;
1164             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1165             sp_tweak_update_area(tc);
1166             ret = TRUE;
1167             break;
1168         case GDK_End:
1169         case GDK_KP_End:
1170             tc->width = 1.0;
1171             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1172             sp_tweak_update_area(tc);
1173             ret = TRUE;
1174             break;
1175         case GDK_x:
1176         case GDK_X:
1177             if (MOD__ALT_ONLY) {
1178                 desktop->setToolboxFocusTo ("altx-tweak");
1179                 ret = TRUE;
1180             }
1181             break;
1182
1183         case GDK_Control_L:
1184         case GDK_Control_R:
1185             if (MOD__SHIFT) {
1186                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1187             } else {
1188                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1189             }
1190             break;
1191         case GDK_Shift_L:
1192         case GDK_Shift_R:
1193             if (MOD__CTRL) {
1194                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1195             }
1196             break;
1197         default:
1198             break;
1199         }
1200         break;
1201
1202     case GDK_KEY_RELEASE:
1203         switch (get_group0_keyval(&event->key)) {
1204             case GDK_Control_L:
1205             case GDK_Control_R:
1206                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1207                 tc->_message_context->clear();
1208                 break;
1209             case GDK_Shift_L:
1210             case GDK_Shift_R:
1211                 if (MOD__CTRL) {
1212                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1213                 }
1214                 break;
1215             break;
1216             default:
1217                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1218                 break;
1219         }
1220
1221     default:
1222         break;
1223     }
1224
1225     if (!ret) {
1226         if (((SPEventContextClass *) parent_class)->root_handler) {
1227             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1228         }
1229     }
1230
1231     return ret;
1232 }
1233
1234
1235 /*
1236   Local Variables:
1237   mode:c++
1238   c-file-style:"stroustrup"
1239   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1240   indent-tabs-mode:nil
1241   fill-column:99
1242   End:
1243 */
1244 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :