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 // FIXME: move it to some shared file to be reused by both calligraphy and dropper
  84 #define C1 0.552
  85 static NArtBpath const hatch_area_circle[] = {
  86     { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
  87     { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
  88     { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
  89     { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
  90     { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
  91     { NR_END, 0, 0, 0, 0, 0, 0 }
  92 };
  93 #undef C1
  94
  95
  96 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  97 static void sp_tweak_context_init(SPTweakContext *ddc);
  98 static void sp_tweak_context_dispose(GObject *object);
  99
 100 static void sp_tweak_context_setup(SPEventContext *ec);
 101 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
 102 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
 103
 104 static SPEventContextClass *parent_class;
 105
 106 GtkType
 107 sp_tweak_context_get_type(void)
 108 {
 109     static GType type = 0;
 110     if (!type) {
 111         GTypeInfo info = {
 112             sizeof(SPTweakContextClass),
 113             NULL, NULL,
 114             (GClassInitFunc) sp_tweak_context_class_init,
 115             NULL, NULL,
 116             sizeof(SPTweakContext),
 117             4,
 118             (GInstanceInitFunc) sp_tweak_context_init,
 119             NULL,   /* value_table */
 120         };
 121         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 122     }
 123     return type;
 124 }
 125
 126 static void
 127 sp_tweak_context_class_init(SPTweakContextClass *klass)
 128 {
 129     GObjectClass *object_class = (GObjectClass *) klass;
 130     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 131
 132     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 133
 134     object_class->dispose = sp_tweak_context_dispose;
 135
 136     event_context_class->setup = sp_tweak_context_setup;
 137     event_context_class->set = sp_tweak_context_set;
 138     event_context_class->root_handler = sp_tweak_context_root_handler;
 139 }
 140
 141 static void
 142 sp_tweak_context_init(SPTweakContext *tc)
 143 {
 144     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 145
 146     event_context->cursor_shape = cursor_push_xpm;
 147     event_context->hot_x = 4;
 148     event_context->hot_y = 4;
 149
 150     /* attributes */
 151     tc->dragging = FALSE;
 152
 153     tc->width = 0.2;
 154     tc->force = 0.2;
 155     tc->pressure = TC_DEFAULT_PRESSURE;
 156
 157     tc->is_dilating = false;
 158     tc->has_dilated = false;
 159
 160     tc->do_h = true;
 161     tc->do_s = true;
 162     tc->do_l = true;
 163     tc->do_o = false;
 164
 165     new (&tc->style_set_connection) sigc::connection();
 166 }
 167
 168 static void
 169 sp_tweak_context_dispose(GObject *object)
 170 {
 171     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 172
 173     tc->style_set_connection.disconnect();
 174     tc->style_set_connection.~connection();
 175
 176     if (tc->dilate_area) {
 177         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 178         tc->dilate_area = NULL;
 179     }
 180
 181     if (tc->_message_context) {
 182         delete tc->_message_context;
 183     }
 184
 185     G_OBJECT_CLASS(parent_class)->dispose(object);
 186 }
 187
 188 void
 189 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 190 {
 191     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 192    switch (mode) {
 193        case TWEAK_MODE_PUSH:
 194            event_context->cursor_shape = cursor_push_xpm;
 195            break;
 196        case TWEAK_MODE_SHRINK:
 197            event_context->cursor_shape = cursor_thin_xpm;
 198            break;
 199        case TWEAK_MODE_GROW:
 200            event_context->cursor_shape = cursor_thicken_xpm;
 201            break;
 202        case TWEAK_MODE_ATTRACT:
 203            event_context->cursor_shape = cursor_attract_xpm;
 204            break;
 205        case TWEAK_MODE_REPEL:
 206            event_context->cursor_shape = cursor_repel_xpm;
 207            break;
 208        case TWEAK_MODE_ROUGHEN:
 209            event_context->cursor_shape = cursor_roughen_xpm;
 210            break;
 211        case TWEAK_MODE_COLORPAINT:
 212        case TWEAK_MODE_COLORJITTER:
 213            event_context->cursor_shape = cursor_color_xpm;
 214            break;
 215    }
 216    sp_event_context_update_cursor(event_context);
 217 }
 218
 219 static bool
 220 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 221 {
 222     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 223         // we cannot store properties with uris
 224         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 225
 226         sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");
 227
 228         return true;
 229     }
 230     return false;
 231 }
 232
 233
 234 static void
 235 sp_tweak_context_setup(SPEventContext *ec)
 236 {
 237     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 238
 239     if (((SPEventContextClass *) parent_class)->setup)
 240         ((SPEventContextClass *) parent_class)->setup(ec);
 241
 242     {
 243         SPCurve *c = SPCurve::new_from_foreign_bpath(hatch_area_circle);
 244         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 245         c->unref();
 246         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 247         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 248         sp_canvas_item_hide(tc->dilate_area);
 249     }
 250
 251     sp_event_context_read(ec, "width");
 252     sp_event_context_read(ec, "mode");
 253     sp_event_context_read(ec, "fidelity");
 254     sp_event_context_read(ec, "force");
 255     sp_event_context_read(ec, "usepressure");
 256     sp_event_context_read(ec, "doh");
 257     sp_event_context_read(ec, "dol");
 258     sp_event_context_read(ec, "dos");
 259     sp_event_context_read(ec, "doo");
 260
 261     tc->is_drawing = false;
 262
 263     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 264
 265     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 266         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 267     );
 268
 269     if (prefs_get_int_attribute("tools.tweak", "selcue", 0) != 0) {
 270         ec->enableSelectionCue();
 271     }
 272
 273     if (prefs_get_int_attribute("tools.tweak", "gradientdrag", 0) != 0) {
 274         ec->enableGrDrag();
 275     }
 276 }
 277
 278 static void
 279 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 280 {
 281     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 282
 283     if (!strcmp(key, "width")) {
 284         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 285         tc->width = CLAMP(dval, -1000.0, 1000.0);
 286     } else if (!strcmp(key, "mode")) {
 287         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 288         tc->mode = dval;
 289         sp_tweak_update_cursor(tc, tc->mode);
 290     } else if (!strcmp(key, "fidelity")) {
 291         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 292         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 293     } else if (!strcmp(key, "force")) {
 294         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 295         tc->force = CLAMP(dval, 0, 1.0);
 296     } else if (!strcmp(key, "usepressure")) {
 297         tc->usepressure = (val && strcmp(val, "0"));
 298     } else if (!strcmp(key, "doh")) {
 299         tc->do_h = (val && strcmp(val, "0"));
 300     } else if (!strcmp(key, "dos")) {
 301         tc->do_s = (val && strcmp(val, "0"));
 302     } else if (!strcmp(key, "dol")) {
 303         tc->do_l = (val && strcmp(val, "0"));
 304     } else if (!strcmp(key, "doo")) {
 305         tc->do_o = (val && strcmp(val, "0"));
 306     }
 307 }
 308
 309 static void
 310 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 311 {
 312     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 313         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 314     else
 315         tc->pressure = TC_DEFAULT_PRESSURE;
 316 }
 317
 318 double
 319 get_dilate_radius (SPTweakContext *tc)
 320 {
 321     // 10 times the pen width:
 322     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 323 }
 324
 325 double
 326 get_dilate_force (SPTweakContext *tc)
 327 {
 328     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 329         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 330     if (force > 3) {
 331         force += 4 * (force - 3);
 332     }
 333     return force * tc->force;
 334 }
 335
 336 bool
 337 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 338 {
 339     bool did = false;
 340
 341     if (SP_IS_BOX3D(item)) {
 342         // convert 3D boxes to ordinary groups before tweaking their shapes
 343         item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));
 344         selection->add(item);
 345     }
 346
 347     if (SP_IS_GROUP(item)) {
 348         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 349             if (SP_IS_ITEM(child)) {
 350                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 351                     did = true;
 352             }
 353         }
 354
 355     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 356
 357         Inkscape::XML::Node *newrepr = NULL;
 358         gint pos = 0;
 359         Inkscape::XML::Node *parent = NULL;
 360         char const *id = NULL;
 361         if (!SP_IS_PATH(item)) {
 362             newrepr = sp_selected_item_to_curved_repr(item, 0);
 363             if (!newrepr)
 364                 return false;
 365
 366             // remember the position of the item
 367             pos = SP_OBJECT_REPR(item)->position();
 368             // remember parent
 369             parent = SP_OBJECT_REPR(item)->parent();
 370             // remember id
 371             id = SP_OBJECT_REPR(item)->attribute("id");
 372         }
 373
 374
 375         // skip those paths whose bboxes are entirely out of reach with our radius
 376         NR::Maybe<NR::Rect> bbox = item->getBounds(from_2geom(sp_item_i2doc_affine(item)));
 377         if (bbox) {
 378             bbox->growBy(radius);
 379             if (!bbox->contains(p)) {
 380                 return false;
 381             }
 382         }
 383
 384         Path *orig = Path_for_item(item, false);
 385         if (orig == NULL) {
 386             return false;
 387         }
 388
 389         Path *res = new Path;
 390         res->SetBackData(false);
 391
 392         Shape *theShape = new Shape;
 393         Shape *theRes = new Shape;
 394         NR::Matrix i2doc(from_2geom(sp_item_i2doc_affine(item)));
 395
 396         orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / NR::expansion(i2doc)); // default 0.059
 397         orig->Fill(theShape, 0);
 398
 399         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 400         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 401         if (val && strcmp(val, "nonzero") == 0)
 402         {
 403             theRes->ConvertToShape(theShape, fill_nonZero);
 404         }
 405         else if (val && strcmp(val, "evenodd") == 0)
 406         {
 407             theRes->ConvertToShape(theShape, fill_oddEven);
 408         }
 409         else
 410         {
 411             theRes->ConvertToShape(theShape, fill_nonZero);
 412         }
 413
 414         if (NR::L2(vector) != 0)
 415             vector = 1/NR::L2(vector) * vector;
 416
 417         bool did_this = false;
 418         if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {
 419             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 420                                  mode == TWEAK_MODE_GROW? force : -force,
 421                                  join_straight, 4.0,
 422                                  true, p, NR::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 423               did_this = true;
 424         } else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {
 425             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 426                                  mode == TWEAK_MODE_REPEL? force : -force,
 427                                  join_straight, 4.0,
 428                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 429               did_this = true;
 430         } else if (mode == TWEAK_MODE_PUSH) {
 431             if (theShape->MakeTweak(tweak_mode_push, theRes,
 432                                  1.0,
 433                                  join_straight, 4.0,
 434                                  true, p, force*2*vector, radius, &i2doc) == 0)
 435               did_this = true;
 436         } else if (mode == TWEAK_MODE_ROUGHEN) {
 437             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 438                                  force,
 439                                  join_straight, 4.0,
 440                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 441               did_this = true;
 442         }
 443
 444         // the rest only makes sense if we actually changed the path
 445         if (did_this) {
 446             theRes->ConvertToShape(theShape, fill_positive);
 447
 448             res->Reset();
 449             theRes->ConvertToForme(res);
 450
 451             double th_max = (0.6 - 0.59*sqrt(fidelity)) / NR::expansion(i2doc);
 452             double threshold = MAX(th_max, th_max*force);
 453             res->ConvertEvenLines(threshold);
 454             res->Simplify(threshold / (SP_ACTIVE_DESKTOP->current_zoom()));
 455
 456             if (newrepr) { // converting to path, need to replace the repr
 457                 bool is_selected = selection->includes(item);
 458                 if (is_selected)
 459                     selection->remove(item);
 460
 461                 // It's going to resurrect, so we delete without notifying listeners.
 462                 SP_OBJECT(item)->deleteObject(false);
 463
 464                 // restore id
 465                 newrepr->setAttribute("id", id);
 466                 // add the new repr to the parent
 467                 parent->appendChild(newrepr);
 468                 // move to the saved position
 469                 newrepr->setPosition(pos > 0 ? pos : 0);
 470
 471                 if (is_selected)
 472                     selection->add(newrepr);
 473             }
 474
 475             if (res->descr_cmd.size() > 1) {
 476                 gchar *str = res->svg_dump_path();
 477                 if (newrepr) {
 478                     newrepr->setAttribute("d", str);
 479                 } else {
 480                     if (SP_IS_LPE_ITEM(item) && sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(item))) {
 481                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 482                     } else {
 483                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 484                     }
 485                 }
 486                 g_free(str);
 487             } else {
 488                 // TODO: if there's 0 or 1 node left, delete this path altogether
 489             }
 490
 491             if (newrepr) {
 492                 Inkscape::GC::release(newrepr);
 493                 newrepr = NULL;
 494             }
 495         }
 496
 497         delete theShape;
 498         delete theRes;
 499         delete orig;
 500         delete res;
 501
 502         if (did_this)
 503             did = true;
 504     }
 505
 506     return did;
 507 }
 508
 509 void
 510 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 511 {
 512     float rgb_g[3];
 513
 514     if (!do_h || !do_s || !do_l) {
 515         float hsl_g[3];
 516         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 517         float hsl_c[3];
 518         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 519         if (!do_h)
 520             hsl_g[0] = hsl_c[0];
 521         if (!do_s)
 522             hsl_g[1] = hsl_c[1];
 523         if (!do_l)
 524             hsl_g[2] = hsl_c[2];
 525         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 526     } else {
 527         rgb_g[0] = SP_RGBA32_R_F(goal);
 528         rgb_g[1] = SP_RGBA32_G_F(goal);
 529         rgb_g[2] = SP_RGBA32_B_F(goal);
 530     }
 531
 532     for (int i = 0; i < 3; i++) {
 533         double d = rgb_g[i] - color[i];
 534         color[i] += d * force;
 535     }
 536 }
 537
 538 void
 539 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 540 {
 541     float hsl_c[3];
 542     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 543
 544     if (do_h) {
 545         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 546         if (hsl_c[0] > 1)
 547             hsl_c[0] -= 1;
 548         if (hsl_c[0] < 0)
 549             hsl_c[0] += 1;
 550     }
 551     if (do_s) {
 552         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 553     }
 554     if (do_l) {
 555         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 556     }
 557
 558     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 559 }
 560
 561 void
 562 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 563 {
 564     if (mode == TWEAK_MODE_COLORPAINT) {
 565         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 566     } else if (mode == TWEAK_MODE_COLORJITTER) {
 567         tweak_colorjitter (color, force, do_h, do_s, do_l);
 568     }
 569 }
 570
 571 void
 572 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 573 {
 574     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 575
 576     if (mode == TWEAK_MODE_COLORPAINT) {
 577         double d = opacity_goal - opacity;
 578         opacity += d * force;
 579     } else if (mode == TWEAK_MODE_COLORJITTER) {
 580         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 581     }
 582
 583     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 584 }
 585
 586
 587 double
 588 tweak_profile (double dist, double radius)
 589 {
 590     if (radius == 0)
 591         return 0;
 592     double x = dist / radius;
 593     double alpha = 1;
 594     if (x >= 1) {
 595         return 0;
 596     } else if (x <= 0) {
 597         return 1;
 598     } else {
 599         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 600     }
 601 }
 602
 603 void
 604 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 605                           guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,
 606                           bool do_h, bool do_s, bool do_l, bool /*do_o*/)
 607 {
 608     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 609
 610     if (!gradient || !SP_IS_GRADIENT(gradient))
 611         return;
 612
 613     NR::Matrix i2d = from_2geom(sp_item_i2doc_affine (item));
 614     NR::Point p = p_w * i2d.inverse();
 615     p *= (gradient->gradientTransform).inverse();
 616     // now p is in gradient's original coordinates
 617
 618     double pos = 0;
 619     double r = 0;
 620     if (SP_IS_LINEARGRADIENT(gradient)) {
 621         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 622
 623         NR::Point p1(lg->x1.computed, lg->y1.computed);
 624         NR::Point p2(lg->x2.computed, lg->y2.computed);
 625         NR::Point pdiff(p2 - p1);
 626         double vl = NR::L2(pdiff);
 627
 628         // This is the matrix which moves and rotates the gradient line
 629         // so it's oriented along the X axis:
 630         NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));
 631
 632         // Transform the mouse point by it to find out its projection onto the gradient line:
 633         NR::Point pnorm = p * norm;
 634
 635         // Scale its X coordinate to match the length of the gradient line:
 636         pos = pnorm[NR::X] / vl;
 637         // Calculate radius in lenfth-of-gradient-line units
 638         r = radius / vl;
 639
 640     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 641         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 642         NR::Point c (rg->cx.computed, rg->cy.computed);
 643         pos = NR::L2(p - c) / rg->r.computed;
 644         r = radius / rg->r.computed;
 645     }
 646
 647     // Normalize pos to 0..1, taking into accound gradient spread:
 648     double pos_e = pos;
 649     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 650         if (pos > 1)
 651             pos_e = 1;
 652         if (pos < 0)
 653             pos_e = 0;
 654     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 655         if (pos > 1 || pos < 0)
 656             pos_e = pos - floor(pos);
 657     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 658         if (pos > 1 || pos < 0) {
 659             bool odd = ((int)(floor(pos)) % 2 == 1);
 660             pos_e = pos - floor(pos);
 661             if (odd)
 662                 pos_e = 1 - pos_e;
 663         }
 664     }
 665
 666     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 667
 668     double offset_l = 0;
 669     double offset_h = 0;
 670     SPObject *child_prev = NULL;
 671     for (SPObject *child = sp_object_first_child(vector);
 672          child != NULL; child = SP_OBJECT_NEXT(child)) {
 673         if (!SP_IS_STOP(child))
 674             continue;
 675         SPStop *stop = SP_STOP (child);
 676
 677         offset_h = stop->offset;
 678
 679         if (child_prev) {
 680
 681             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 682                 // the summit falls in this interstop, and the radius is small,
 683                 // so it only affects the ends of this interstop;
 684                 // distribute the force between the two endstops so that they
 685                 // get all the painting even if they are not touched by the brush
 686                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 687                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 688                                   do_h, do_s, do_l);
 689                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 690                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 691                                   do_h, do_s, do_l);
 692                 SP_OBJECT(stop)->updateRepr();
 693                 child_prev->updateRepr();
 694                 break;
 695             } else {
 696                 // wide brush, may affect more than 2 stops,
 697                 // paint each stop by the force from the profile curve
 698                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 699                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 700                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 701                                  do_h, do_s, do_l);
 702                     child_prev->updateRepr();
 703                 }
 704
 705                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 706                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 707                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 708                                  do_h, do_s, do_l);
 709                     SP_OBJECT(stop)->updateRepr();
 710                 }
 711             }
 712         }
 713
 714         offset_l = offset_h;
 715         child_prev = child;
 716     }
 717 }
 718
 719 bool
 720 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 721                           guint32 fill_goal, bool do_fill,
 722                           guint32 stroke_goal, bool do_stroke,
 723                           float opacity_goal, bool do_opacity,
 724                           NR::Point p, double radius, double force,
 725                           bool do_h, bool do_s, bool do_l, bool do_o)
 726 {
 727     bool did = false;
 728
 729     if (SP_IS_GROUP(item)) {
 730         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 731             if (SP_IS_ITEM(child)) {
 732                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 733                                           fill_goal, do_fill,
 734                                           stroke_goal, do_stroke,
 735                                           opacity_goal, do_opacity,
 736                                           p, radius, force, do_h, do_s, do_l, do_o))
 737                     did = true;
 738             }
 739         }
 740
 741     } else {
 742         SPStyle *style = SP_OBJECT_STYLE(item);
 743         if (!style) {
 744             return false;
 745         }
 746         NR::Maybe<NR::Rect> bbox = item->getBounds(from_2geom(sp_item_i2doc_affine(item)),
 747                                                         SPItem::GEOMETRIC_BBOX);
 748         if (!bbox) {
 749             return false;
 750         }
 751
 752         NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));
 753
 754         NR::Point center = bbox->midpoint();
 755         double this_force;
 756
 757 // if item == item_at_point, use max force
 758         if (item == item_at_point) {
 759             this_force = force;
 760 // else if no overlap of bbox and brush box, skip:
 761         } else if (!bbox->intersects(brush)) {
 762             return false;
 763 //TODO:
 764 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 765         //} else if (bbox->maxExtent() > 3 * radius) {
 766         //}
 767 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 768 // else if still smaller, then check only the object center:
 769         } else {
 770             this_force = force * tweak_profile (NR::L2 (p - center), radius);
 771         }
 772
 773         if (this_force > 0.002) {
 774
 775             if (do_fill) {
 776                 if (style->fill.isPaintserver()) {
 777                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 778                     did = true;
 779                 } else if (style->fill.isColor()) {
 780                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
 781                     item->updateRepr();
 782                     did = true;
 783                 }
 784             }
 785             if (do_stroke) {
 786                 if (style->stroke.isPaintserver()) {
 787                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 788                     did = true;
 789                 } else if (style->stroke.isColor()) {
 790                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
 791                     item->updateRepr();
 792                     did = true;
 793                 }
 794             }
 795             if (do_opacity && do_o) {
 796                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
 797             }
 798         }
 799     }
 800
 801     return did;
 802 }
 803
 804
 805 bool
 806 sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)
 807 {
 808     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 809
 810     if (selection->isEmpty()) {
 811         return false;
 812     }
 813
 814     bool did = false;
 815     double radius = get_dilate_radius(tc);
 816     double force = get_dilate_force(tc);
 817     if (radius == 0 || force == 0) {
 818         return false;
 819     }
 820     double color_force = MIN(sqrt(force)/20.0, 1);
 821
 822     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
 823     Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.tweak");
 824     SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
 825     if (tc->mode == TWEAK_MODE_COLORPAINT && !css)
 826         return false;
 827
 828     bool do_fill = false, do_stroke = false, do_opacity = false;
 829     guint32 fill_goal = 0, stroke_goal = 0;
 830     float opacity_goal = 1;
 831
 832     const gchar *fill_prop = sp_repr_css_property(css, "fill", NULL);
 833     if (fill_prop && strcmp(fill_prop, "none")) {
 834         do_fill = true;
 835         fill_goal = sp_svg_read_color(fill_prop, 0);
 836     }
 837     const gchar *stroke_prop = sp_repr_css_property(css, "stroke", NULL);
 838     if (stroke_prop && strcmp(stroke_prop, "none")) {
 839         do_stroke = true;
 840         stroke_goal = sp_svg_read_color(stroke_prop, 0);
 841     }
 842     const gchar *opacity_prop = sp_repr_css_property(css, "opacity", NULL);
 843     if (opacity_prop) {
 844         do_opacity = true;
 845         sp_svg_number_read_f(opacity_prop, &opacity_goal);
 846     }
 847
 848     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 849          items != NULL;
 850          items = items->next) {
 851
 852         SPItem *item = (SPItem *) items->data;
 853
 854         if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {
 855             if (do_fill || do_stroke || do_opacity) {
 856                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
 857                                           fill_goal, do_fill,
 858                                           stroke_goal, do_stroke,
 859                                           opacity_goal, do_opacity,
 860                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
 861                 did = true;
 862             }
 863         } else {
 864             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 865                 did = true;
 866         }
 867     }
 868
 869     return did;
 870 }
 871
 872 void
 873 sp_tweak_update_area (SPTweakContext *tc)
 874 {
 875         double radius = get_dilate_radius(tc);
 876         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 877         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 878         sp_canvas_item_show(tc->dilate_area);
 879 }
 880
 881 void
 882 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 883 {
 884     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 885     // need to set explicitly, because the prefs may not have changed by the previous
 886     tc->mode = mode;
 887     sp_tweak_update_cursor (tc, mode);
 888 }
 889
 890 void
 891 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 892 {
 893    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 894    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 895    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 896    // button has changed prefs, restore
 897    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 898    // changing prefs changed tc->mode, restore back :)
 899    tc->mode = mode;
 900    sp_tweak_update_cursor (tc, mode);
 901 }
 902
 903 gint
 904 sp_tweak_context_root_handler(SPEventContext *event_context,
 905                                   GdkEvent *event)
 906 {
 907     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 908     SPDesktop *desktop = event_context->desktop;
 909
 910     gint ret = FALSE;
 911
 912     switch (event->type) {
 913         case GDK_ENTER_NOTIFY:
 914             sp_canvas_item_show(tc->dilate_area);
 915             break;
 916         case GDK_LEAVE_NOTIFY:
 917             sp_canvas_item_hide(tc->dilate_area);
 918             break;
 919         case GDK_BUTTON_PRESS:
 920             if (event->button.button == 1 && !event_context->space_panning) {
 921
 922                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 923                     return TRUE;
 924                 }
 925
 926                 NR::Point const button_w(event->button.x,
 927                                          event->button.y);
 928                 NR::Point const button_dt(desktop->w2d(button_w));
 929                 tc->last_push = desktop->dt2doc(button_dt);
 930
 931                 sp_tweak_extinput(tc, event);
 932
 933                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 934                 tc->is_drawing = true;
 935                 tc->is_dilating = true;
 936                 tc->has_dilated = false;
 937
 938                 ret = TRUE;
 939             }
 940             break;
 941         case GDK_MOTION_NOTIFY:
 942         {
 943             NR::Point const motion_w(event->motion.x,
 944                                      event->motion.y);
 945             NR::Point motion_dt(desktop->w2d(motion_w));
 946             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 947             sp_tweak_extinput(tc, event);
 948
 949             // draw the dilating cursor
 950                 double radius = get_dilate_radius(tc);
 951                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 952                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 953                 sp_canvas_item_show(tc->dilate_area);
 954
 955                 guint num = 0;
 956                 if (!desktop->selection->isEmpty()) {
 957                     num = g_slist_length((GSList *) desktop->selection->itemList());
 958                 }
 959                 if (num == 0) {
 960                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
 961                 } else {
 962                     switch (tc->mode) {
 963                         case TWEAK_MODE_PUSH:
 964                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 965                                                       ngettext("<b>Pushing %d</b> selected object",
 966                                                       "<b>Pushing %d</b> selected objects", num), num);
 967                            break;
 968                         case TWEAK_MODE_SHRINK:
 969                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 970                                                       ngettext("<b>Shrinking %d</b> selected object",
 971                                                       "<b>Shrinking %d</b> selected objects", num), num);
 972                            break;
 973                         case TWEAK_MODE_GROW:
 974                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 975                                                       ngettext("<b>Growing %d</b> selected object",
 976                                                       "<b>Growing %d</b> selected objects", num), num);
 977                            break;
 978                         case TWEAK_MODE_ATTRACT:
 979                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 980                                                       ngettext("<b>Attracting %d</b> selected object",
 981                                                       "<b>Attracting %d</b> selected objects", num), num);
 982                            break;
 983                         case TWEAK_MODE_REPEL:
 984                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 985                                                       ngettext("<b>Repelling %d</b> selected object",
 986                                                       "<b>Repelling %d</b> selected objects", num), num);
 987                            break;
 988                         case TWEAK_MODE_ROUGHEN:
 989                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 990                                                       ngettext("<b>Roughening %d</b> selected object",
 991                                                       "<b>Roughening %d</b> selected objects", num), num);
 992                            break;
 993                         case TWEAK_MODE_COLORPAINT:
 994                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 995                                                       ngettext("<b>Painting %d</b> selected object",
 996                                                       "<b>Painting %d</b> selected objects", num), num);
 997                            break;
 998                         case TWEAK_MODE_COLORJITTER:
 999                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
1000                                                       ngettext("<b>Jittering colors in %d</b> selected object",
1001                                                       "<b>Jittering colors in %d</b> selected objects", num), num);
1002                            break;
1003                     }
1004                 }
1005
1006
1007             // dilating:
1008             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
1009                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);
1010                 //tc->last_push = motion_doc;
1011                 tc->has_dilated = true;
1012                 // it's slow, so prevent clogging up with events
1013                 gobble_motion_events(GDK_BUTTON1_MASK);
1014                 return TRUE;
1015             }
1016
1017         }
1018         break;
1019
1020
1021     case GDK_BUTTON_RELEASE:
1022     {
1023         NR::Point const motion_w(event->button.x, event->button.y);
1024         NR::Point const motion_dt(desktop->w2d(motion_w));
1025
1026         sp_canvas_end_forced_full_redraws(desktop->canvas);
1027         tc->is_drawing = false;
1028
1029         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1030             if (!tc->has_dilated) {
1031                 // if we did not rub, do a light tap
1032                 tc->pressure = 0.03;
1033                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));
1034             }
1035             tc->is_dilating = false;
1036             tc->has_dilated = false;
1037             switch (tc->mode) {
1038                 case TWEAK_MODE_PUSH:
1039                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1040                                      SP_VERB_CONTEXT_TWEAK, _("Push tweak"));
1041                     break;
1042                 case TWEAK_MODE_SHRINK:
1043                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1044                                      SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));
1045                     break;
1046                 case TWEAK_MODE_GROW:
1047                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1048                                      SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));
1049                     break;
1050                 case TWEAK_MODE_ATTRACT:
1051                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1052                                      SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));
1053                     break;
1054                 case TWEAK_MODE_REPEL:
1055                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1056                                      SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));
1057                     break;
1058                 case TWEAK_MODE_ROUGHEN:
1059                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1060                                      SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));
1061                     break;
1062                 case TWEAK_MODE_COLORPAINT:
1063                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1064                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1065                     break;
1066                 case TWEAK_MODE_COLORJITTER:
1067                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1068                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1069                     break;
1070             }
1071         }
1072         break;
1073     }
1074
1075     case GDK_KEY_PRESS:
1076         switch (get_group0_keyval (&event->key)) {
1077         case GDK_p:
1078         case GDK_P:
1079         case GDK_1:
1080             if (MOD__SHIFT_ONLY) {
1081                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
1082                 ret = TRUE;
1083             }
1084             break;
1085         case GDK_s:
1086         case GDK_S:
1087         case GDK_2:
1088             if (MOD__SHIFT_ONLY) {
1089                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);
1090                 ret = TRUE;
1091             }
1092             break;
1093         case GDK_g:
1094         case GDK_G:
1095         case GDK_3:
1096             if (MOD__SHIFT_ONLY) {
1097                 sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);
1098                 ret = TRUE;
1099             }
1100             break;
1101         case GDK_a:
1102         case GDK_A:
1103         case GDK_4:
1104             if (MOD__SHIFT_ONLY) {
1105                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);
1106                 ret = TRUE;
1107             }
1108             break;
1109         case GDK_e:
1110         case GDK_E:
1111         case GDK_5:
1112             if (MOD__SHIFT_ONLY) {
1113                 sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);
1114                 ret = TRUE;
1115             }
1116             break;
1117         case GDK_r:
1118         case GDK_R:
1119         case GDK_6:
1120             if (MOD__SHIFT_ONLY) {
1121                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
1122                 ret = TRUE;
1123             }
1124             break;
1125         case GDK_c:
1126         case GDK_C:
1127         case GDK_7:
1128             if (MOD__SHIFT_ONLY) {
1129                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);
1130                 ret = TRUE;
1131             }
1132             break;
1133         case GDK_j:
1134         case GDK_J:
1135         case GDK_8:
1136             if (MOD__SHIFT_ONLY) {
1137                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);
1138                 ret = TRUE;
1139             }
1140             break;
1141
1142         case GDK_Up:
1143         case GDK_KP_Up:
1144             if (!MOD__CTRL_ONLY) {
1145                 tc->force += 0.05;
1146                 if (tc->force > 1.0)
1147                     tc->force = 1.0;
1148                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1149                 ret = TRUE;
1150             }
1151             break;
1152         case GDK_Down:
1153         case GDK_KP_Down:
1154             if (!MOD__CTRL_ONLY) {
1155                 tc->force -= 0.05;
1156                 if (tc->force < 0.0)
1157                     tc->force = 0.0;
1158                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1159                 ret = TRUE;
1160             }
1161             break;
1162         case GDK_Right:
1163         case GDK_KP_Right:
1164             if (!MOD__CTRL_ONLY) {
1165                 tc->width += 0.01;
1166                 if (tc->width > 1.0)
1167                     tc->width = 1.0;
1168                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1169                 sp_tweak_update_area(tc);
1170                 ret = TRUE;
1171             }
1172             break;
1173         case GDK_Left:
1174         case GDK_KP_Left:
1175             if (!MOD__CTRL_ONLY) {
1176                 tc->width -= 0.01;
1177                 if (tc->width < 0.01)
1178                     tc->width = 0.01;
1179                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1180                 sp_tweak_update_area(tc);
1181                 ret = TRUE;
1182             }
1183             break;
1184         case GDK_Home:
1185         case GDK_KP_Home:
1186             tc->width = 0.01;
1187             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1188             sp_tweak_update_area(tc);
1189             ret = TRUE;
1190             break;
1191         case GDK_End:
1192         case GDK_KP_End:
1193             tc->width = 1.0;
1194             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1195             sp_tweak_update_area(tc);
1196             ret = TRUE;
1197             break;
1198         case GDK_x:
1199         case GDK_X:
1200             if (MOD__ALT_ONLY) {
1201                 desktop->setToolboxFocusTo ("altx-tweak");
1202                 ret = TRUE;
1203             }
1204             break;
1205
1206         case GDK_Control_L:
1207         case GDK_Control_R:
1208             if (MOD__SHIFT) {
1209                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1210             } else {
1211                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1212             }
1213             break;
1214         case GDK_Shift_L:
1215         case GDK_Shift_R:
1216             if (MOD__CTRL) {
1217                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1218             }
1219             break;
1220         default:
1221             break;
1222         }
1223         break;
1224
1225     case GDK_KEY_RELEASE:
1226         switch (get_group0_keyval(&event->key)) {
1227             case GDK_Control_L:
1228             case GDK_Control_R:
1229                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1230                 tc->_message_context->clear();
1231                 break;
1232             case GDK_Shift_L:
1233             case GDK_Shift_R:
1234                 if (MOD__CTRL) {
1235                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1236                 }
1237                 break;
1238             break;
1239             default:
1240                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1241                 break;
1242         }
1243
1244     default:
1245         break;
1246     }
1247
1248     if (!ret) {
1249         if (((SPEventContextClass *) parent_class)->root_handler) {
1250             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1251         }
1252     }
1253
1254     return ret;
1255 }
1256
1257
1258 /*
1259   Local Variables:
1260   mode:c++
1261   c-file-style:"stroustrup"
1262   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1263   indent-tabs-mode:nil
1264   fill-column:99
1265   End:
1266 */
1267 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :