src/tweak-context.cpp

   1 #define __SP_TWEAK_CONTEXT_C__
   2
   3 /*
   4  * tweaking paths without node editing
   5  *
   6  * Authors:
   7  *   bulia byak
   8  *
   9  * Copyright (C) 2007 authors
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #include "config.h"
  15
  16 #include <gtk/gtk.h>
  17 #include <gdk/gdkkeysyms.h>
  18 #include <glibmm/i18n.h>
  19
  20 #include <numeric>
  21
  22 #include "svg/svg.h"
  23 #include "display/canvas-bpath.h"
  24 #include "display/bezier-utils.h"
  25
  26 #include <glib/gmem.h>
  27 #include "macros.h"
  28 #include "document.h"
  29 #include "selection.h"
  30 #include "desktop.h"
  31 #include "desktop-events.h"
  32 #include "desktop-handles.h"
  33 #include "desktop-affine.h"
  34 #include "desktop-style.h"
  35 #include "message-context.h"
  36 #include "pixmaps/cursor-thin.xpm"
  37 #include "pixmaps/cursor-thicken.xpm"
  38 #include "pixmaps/cursor-attract.xpm"
  39 #include "pixmaps/cursor-repel.xpm"
  40 #include "pixmaps/cursor-push.xpm"
  41 #include "pixmaps/cursor-roughen.xpm"
  42 #include "pixmaps/cursor-color.xpm"
  43 #include "libnr/n-art-bpath.h"
  44 #include "libnr/nr-path.h"
  45 #include "libnr/nr-maybe.h"
  46 #include "libnr/nr-matrix-ops.h"
  47 #include "libnr/nr-scale-translate-ops.h"
  48 #include "xml/repr.h"
  49 #include "context-fns.h"
  50 #include "sp-item.h"
  51 #include "inkscape.h"
  52 #include "color.h"
  53 #include "svg/svg-color.h"
  54 #include "splivarot.h"
  55 #include "sp-item-group.h"
  56 #include "sp-shape.h"
  57 #include "sp-path.h"
  58 #include "path-chemistry.h"
  59 #include "sp-gradient.h"
  60 #include "sp-stop.h"
  61 #include "sp-stop-fns.h"
  62 #include "sp-gradient-reference.h"
  63 #include "sp-linear-gradient.h"
  64 #include "sp-radial-gradient.h"
  65 #include "gradient-chemistry.h"
  66 #include "sp-text.h"
  67 #include "sp-flowtext.h"
  68 #include "display/canvas-bpath.h"
  69 #include "display/canvas-arena.h"
  70 #include "livarot/Shape.h"
  71 #include "isnan.h"
  72 #include "prefs-utils.h"
  73 #include "style.h"
  74
  75 #include "tweak-context.h"
  76
  77 #define DDC_RED_RGBA 0xff0000ff
  78
  79 #define DYNA_MIN_WIDTH 1.0e-6
  80
  81 // FIXME: move it to some shared file to be reused by both calligraphy and dropper
  82 #define C1 0.552
  83 static NArtBpath const hatch_area_circle[] = {
  84     { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
  85     { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
  86     { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
  87     { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
  88     { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
  89     { NR_END, 0, 0, 0, 0, 0, 0 }
  90 };
  91 #undef C1
  92
  93
  94 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  95 static void sp_tweak_context_init(SPTweakContext *ddc);
  96 static void sp_tweak_context_dispose(GObject *object);
  97
  98 static void sp_tweak_context_setup(SPEventContext *ec);
  99 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
 100 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
 101
 102 static SPEventContextClass *parent_class;
 103
 104 GtkType
 105 sp_tweak_context_get_type(void)
 106 {
 107     static GType type = 0;
 108     if (!type) {
 109         GTypeInfo info = {
 110             sizeof(SPTweakContextClass),
 111             NULL, NULL,
 112             (GClassInitFunc) sp_tweak_context_class_init,
 113             NULL, NULL,
 114             sizeof(SPTweakContext),
 115             4,
 116             (GInstanceInitFunc) sp_tweak_context_init,
 117             NULL,   /* value_table */
 118         };
 119         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 120     }
 121     return type;
 122 }
 123
 124 static void
 125 sp_tweak_context_class_init(SPTweakContextClass *klass)
 126 {
 127     GObjectClass *object_class = (GObjectClass *) klass;
 128     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 129
 130     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 131
 132     object_class->dispose = sp_tweak_context_dispose;
 133
 134     event_context_class->setup = sp_tweak_context_setup;
 135     event_context_class->set = sp_tweak_context_set;
 136     event_context_class->root_handler = sp_tweak_context_root_handler;
 137 }
 138
 139 static void
 140 sp_tweak_context_init(SPTweakContext *tc)
 141 {
 142     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 143
 144     event_context->cursor_shape = cursor_push_xpm;
 145     event_context->hot_x = 4;
 146     event_context->hot_y = 4;
 147
 148     /* attributes */
 149     tc->dragging = FALSE;
 150
 151     tc->width = 0.2;
 152     tc->force = 0.2;
 153     tc->pressure = TC_DEFAULT_PRESSURE;
 154
 155     tc->is_dilating = false;
 156     tc->has_dilated = false;
 157
 158     tc->do_h = true;
 159     tc->do_s = true;
 160     tc->do_l = true;
 161     tc->do_o = false;
 162
 163     new (&tc->style_set_connection) sigc::connection();
 164 }
 165
 166 static void
 167 sp_tweak_context_dispose(GObject *object)
 168 {
 169     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 170
 171     tc->style_set_connection.disconnect();
 172     tc->style_set_connection.~connection();
 173
 174     if (tc->dilate_area) {
 175         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 176         tc->dilate_area = NULL;
 177     }
 178
 179     if (tc->_message_context) {
 180         delete tc->_message_context;
 181     }
 182
 183     G_OBJECT_CLASS(parent_class)->dispose(object);
 184 }
 185
 186 void
 187 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 188 {
 189     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 190    switch (mode) {
 191        case TWEAK_MODE_PUSH:
 192            event_context->cursor_shape = cursor_push_xpm;
 193            break;
 194        case TWEAK_MODE_SHRINK:
 195            event_context->cursor_shape = cursor_thin_xpm;
 196            break;
 197        case TWEAK_MODE_GROW:
 198            event_context->cursor_shape = cursor_thicken_xpm;
 199            break;
 200        case TWEAK_MODE_ATTRACT:
 201            event_context->cursor_shape = cursor_attract_xpm;
 202            break;
 203        case TWEAK_MODE_REPEL:
 204            event_context->cursor_shape = cursor_repel_xpm;
 205            break;
 206        case TWEAK_MODE_ROUGHEN:
 207            event_context->cursor_shape = cursor_roughen_xpm;
 208            break;
 209        case TWEAK_MODE_COLORPAINT:
 210        case TWEAK_MODE_COLORJITTER:
 211            event_context->cursor_shape = cursor_color_xpm;
 212            break;
 213    }
 214    sp_event_context_update_cursor(event_context);
 215 }
 216
 217 static bool
 218 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 219 {
 220     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 221         // we cannot store properties with uris
 222         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 223
 224         sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");
 225
 226         return true;
 227     }
 228     return false;
 229 }
 230
 231
 232 static void
 233 sp_tweak_context_setup(SPEventContext *ec)
 234 {
 235     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 236
 237     if (((SPEventContextClass *) parent_class)->setup)
 238         ((SPEventContextClass *) parent_class)->setup(ec);
 239
 240     {
 241         SPCurve *c = sp_curve_new_from_foreign_bpath(hatch_area_circle);
 242         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 243         sp_curve_unref(c);
 244         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 245         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 246         sp_canvas_item_hide(tc->dilate_area);
 247     }
 248
 249     sp_event_context_read(ec, "width");
 250     sp_event_context_read(ec, "mode");
 251     sp_event_context_read(ec, "fidelity");
 252     sp_event_context_read(ec, "force");
 253     sp_event_context_read(ec, "usepressure");
 254     sp_event_context_read(ec, "doh");
 255     sp_event_context_read(ec, "dol");
 256     sp_event_context_read(ec, "dos");
 257     sp_event_context_read(ec, "doo");
 258
 259     tc->is_drawing = false;
 260
 261     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 262
 263     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 264         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 265     );
 266 }
 267
 268 static void
 269 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 270 {
 271     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 272
 273     if (!strcmp(key, "width")) {
 274         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 275         tc->width = CLAMP(dval, -1000.0, 1000.0);
 276     } else if (!strcmp(key, "mode")) {
 277         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 278         tc->mode = dval;
 279         sp_tweak_update_cursor(tc, tc->mode);
 280     } else if (!strcmp(key, "fidelity")) {
 281         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 282         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 283     } else if (!strcmp(key, "force")) {
 284         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 285         tc->force = CLAMP(dval, 0, 1.0);
 286     } else if (!strcmp(key, "usepressure")) {
 287         tc->usepressure = (val && strcmp(val, "0"));
 288     } else if (!strcmp(key, "doh")) {
 289         tc->do_h = (val && strcmp(val, "0"));
 290     } else if (!strcmp(key, "dos")) {
 291         tc->do_s = (val && strcmp(val, "0"));
 292     } else if (!strcmp(key, "dol")) {
 293         tc->do_l = (val && strcmp(val, "0"));
 294     } else if (!strcmp(key, "doo")) {
 295         tc->do_o = (val && strcmp(val, "0"));
 296     }
 297 }
 298
 299 static void
 300 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 301 {
 302     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 303         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 304     else
 305         tc->pressure = TC_DEFAULT_PRESSURE;
 306 }
 307
 308 double
 309 get_dilate_radius (SPTweakContext *tc)
 310 {
 311     // 10 times the pen width:
 312     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 313 }
 314
 315 double
 316 get_dilate_force (SPTweakContext *tc)
 317 {
 318     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 319         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 320     if (force > 3) {
 321         force += 4 * (force - 3);
 322     }
 323     return force * tc->force;
 324 }
 325
 326 bool
 327 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 328 {
 329     bool did = false;
 330
 331     if (SP_IS_GROUP(item)) {
 332         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 333             if (SP_IS_ITEM(child)) {
 334                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 335                     did = true;
 336             }
 337         }
 338
 339     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 340
 341         Inkscape::XML::Node *newrepr = NULL;
 342         gint pos = 0;
 343         Inkscape::XML::Node *parent = NULL;
 344         char const *id = NULL;
 345         if (!SP_IS_PATH(item)) {
 346             newrepr = sp_selected_item_to_curved_repr(item, 0);
 347             if (!newrepr)
 348                 return false;
 349
 350             // remember the position of the item
 351             pos = SP_OBJECT_REPR(item)->position();
 352             // remember parent
 353             parent = SP_OBJECT_REPR(item)->parent();
 354             // remember id
 355             id = SP_OBJECT_REPR(item)->attribute("id");
 356         }
 357
 358
 359         // skip those paths whose bboxes are entirely out of reach with our radius
 360         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));
 361         if (bbox) {
 362             bbox->growBy(radius);
 363             if (!bbox->contains(p)) {
 364                 return false;
 365             }
 366         }
 367
 368         Path *orig = Path_for_item(item, false);
 369         if (orig == NULL) {
 370             return false;
 371         }
 372
 373         Path *res = new Path;
 374         res->SetBackData(false);
 375
 376         Shape *theShape = new Shape;
 377         Shape *theRes = new Shape;
 378
 379         orig->ConvertWithBackData(0.08 - (0.07 * fidelity)); // default 0.059
 380         orig->Fill(theShape, 0);
 381
 382         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 383         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 384         if (val && strcmp(val, "nonzero") == 0)
 385         {
 386             theRes->ConvertToShape(theShape, fill_nonZero);
 387         }
 388         else if (val && strcmp(val, "evenodd") == 0)
 389         {
 390             theRes->ConvertToShape(theShape, fill_oddEven);
 391         }
 392         else
 393         {
 394             theRes->ConvertToShape(theShape, fill_nonZero);
 395         }
 396
 397         if (NR::L2(vector) != 0)
 398             vector = 1/NR::L2(vector) * vector;
 399
 400         bool did_this = false;
 401         NR::Matrix i2doc(sp_item_i2doc_affine(item));
 402         if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {
 403             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 404                                  mode == TWEAK_MODE_GROW? force : -force,
 405                                  join_straight, 4.0,
 406                                  true, p, NR::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 407               did_this = true;
 408         } else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {
 409             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 410                                  mode == TWEAK_MODE_REPEL? force : -force,
 411                                  join_straight, 4.0,
 412                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 413               did_this = true;
 414         } else if (mode == TWEAK_MODE_PUSH) {
 415             if (theShape->MakeTweak(tweak_mode_push, theRes,
 416                                  0,
 417                                  join_straight, 4.0,
 418                                  true, p, force*2*vector, radius, &i2doc) == 0)
 419               did_this = true;
 420         } else if (mode == TWEAK_MODE_ROUGHEN) {
 421             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 422                                  force,
 423                                  join_straight, 4.0,
 424                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 425               did_this = true;
 426         }
 427
 428         // the rest only makes sense if we actually changed the path
 429         if (did_this) {
 430             theRes->ConvertToShape(theShape, fill_positive);
 431
 432             res->Reset();
 433             theRes->ConvertToForme(res);
 434
 435             double th_max = 0.6 - 0.59*sqrt(fidelity);
 436             double threshold = MAX(th_max, th_max*force);
 437             res->ConvertEvenLines(threshold);
 438             res->Simplify(threshold);
 439
 440             if (newrepr) { // converting to path, need to replace the repr
 441                 bool is_selected = selection->includes(item);
 442                 if (is_selected)
 443                     selection->remove(item);
 444
 445                 // It's going to resurrect, so we delete without notifying listeners.
 446                 SP_OBJECT(item)->deleteObject(false);
 447
 448                 // restore id
 449                 newrepr->setAttribute("id", id);
 450                 // add the new repr to the parent
 451                 parent->appendChild(newrepr);
 452                 // move to the saved position
 453                 newrepr->setPosition(pos > 0 ? pos : 0);
 454
 455                 if (is_selected)
 456                     selection->add(newrepr);
 457             }
 458
 459             if (res->descr_cmd.size() > 1) {
 460                 gchar *str = res->svg_dump_path();
 461                 if (newrepr) {
 462                     newrepr->setAttribute("d", str);
 463                 } else {
 464                     if (SP_IS_SHAPE(item) && SP_SHAPE(item)->path_effect_href) {
 465                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 466                     } else {
 467                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 468                     }
 469                 }
 470                 g_free(str);
 471             } else {
 472                 // TODO: if there's 0 or 1 node left, delete this path altogether
 473             }
 474
 475             if (newrepr) {
 476                 Inkscape::GC::release(newrepr);
 477                 newrepr = NULL;
 478             }
 479         }
 480
 481         delete theShape;
 482         delete theRes;
 483         delete orig;
 484         delete res;
 485
 486         if (did_this)
 487             did = true;
 488     }
 489
 490     return did;
 491 }
 492
 493 void
 494 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 495 {
 496     float rgb_g[3];
 497
 498     if (!do_h || !do_s || !do_l) {
 499         float hsl_g[3];
 500         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 501         float hsl_c[3];
 502         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 503         if (!do_h)
 504             hsl_g[0] = hsl_c[0];
 505         if (!do_s)
 506             hsl_g[1] = hsl_c[1];
 507         if (!do_l)
 508             hsl_g[2] = hsl_c[2];
 509         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 510     } else {
 511         rgb_g[0] = SP_RGBA32_R_F(goal);
 512         rgb_g[1] = SP_RGBA32_G_F(goal);
 513         rgb_g[2] = SP_RGBA32_B_F(goal);
 514     }
 515
 516     for (int i = 0; i < 3; i++) {
 517         double d = rgb_g[i] - color[i];
 518         color[i] += d * force;
 519     }
 520 }
 521
 522 void
 523 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 524 {
 525     force = force*force; // in [0..1], this makes finer adjustments easier
 526
 527     float hsl_c[3];
 528     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 529
 530     if (do_h) {
 531         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 532         if (hsl_c[0] > 1)
 533             hsl_c[0] -= 1;
 534         if (hsl_c[0] < 0)
 535             hsl_c[0] += 1;
 536     }
 537     if (do_s) {
 538         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 539     }
 540     if (do_l) {
 541         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 542     }
 543
 544     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 545 }
 546
 547 void
 548 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 549 {
 550     if (mode == TWEAK_MODE_COLORPAINT) {
 551         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 552     } else if (mode == TWEAK_MODE_COLORJITTER) {
 553         tweak_colorjitter (color, force, do_h, do_s, do_l);
 554     }
 555 }
 556
 557 void
 558 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 559 {
 560     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 561
 562     if (mode == TWEAK_MODE_COLORPAINT) {
 563         double d = opacity_goal - opacity;
 564         opacity += d * force;
 565     } else if (mode == TWEAK_MODE_COLORJITTER) {
 566         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 567     }
 568
 569     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 570 }
 571
 572
 573 double
 574 tweak_profile (double dist, double radius)
 575 {
 576     if (radius == 0)
 577         return 0;
 578     double x = dist / radius;
 579     double alpha = 1;
 580     if (x >= 1) {
 581         return 0;
 582     } else if (x <= 0) {
 583         return 1;
 584     } else {
 585         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 586     }
 587 }
 588
 589 void
 590 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 591     guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,
 592     bool do_h, bool do_s, bool do_l, bool do_o)
 593 {
 594     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 595
 596     if (!gradient || !SP_IS_GRADIENT(gradient))
 597         return;
 598
 599     NR::Matrix i2d = sp_item_i2doc_affine (item);
 600     NR::Point p = p_w * i2d.inverse();
 601     p *= (gradient->gradientTransform).inverse();
 602     // now p is in gradient's original coordinates
 603
 604     double pos = 0;
 605     double r = 0;
 606     if (SP_IS_LINEARGRADIENT(gradient)) {
 607         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 608
 609         NR::Point p1(lg->x1.computed, lg->y1.computed);
 610         NR::Point p2(lg->x2.computed, lg->y2.computed);
 611         NR::Point pdiff(p2 - p1);
 612         double vl = NR::L2(pdiff);
 613
 614         // This is the matrix which moves and rotates the gradient line
 615         // so it's oriented along the X axis:
 616         NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));
 617
 618         // Transform the mouse point by it to find out its projection onto the gradient line:
 619         NR::Point pnorm = p * norm;
 620
 621         // Scale its X coordinate to match the length of the gradient line:
 622         pos = pnorm[NR::X] / vl;
 623         // Calculate radius in lenfth-of-gradient-line units
 624         r = radius / vl;
 625
 626     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 627         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 628         NR::Point c (rg->cx.computed, rg->cy.computed);
 629         pos = NR::L2(p - c) / rg->r.computed;
 630         r = radius / rg->r.computed;
 631     }
 632
 633     // Normalize pos to 0..1, taking into accound gradient spread:
 634     double pos_e = pos;
 635     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 636         if (pos > 1)
 637             pos_e = 1;
 638         if (pos < 0)
 639             pos_e = 0;
 640     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 641         if (pos > 1 || pos < 0)
 642             pos_e = pos - floor(pos);
 643     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 644         if (pos > 1 || pos < 0) {
 645             bool odd = ((int)(floor(pos)) % 2 == 1);
 646             pos_e = pos - floor(pos);
 647             if (odd)
 648                 pos_e = 1 - pos_e;
 649         }
 650     }
 651
 652     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 653
 654     double offset_l = 0;
 655     double offset_h = 0;
 656     SPObject *child_prev = NULL;
 657     for (SPObject *child = sp_object_first_child(vector);
 658          child != NULL; child = SP_OBJECT_NEXT(child)) {
 659         if (!SP_IS_STOP(child))
 660             continue;
 661         SPStop *stop = SP_STOP (child);
 662
 663         offset_h = stop->offset;
 664
 665         if (child_prev) {
 666
 667             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 668                 // the summit falls in this interstop, and the radius is small,
 669                 // so it only affects the ends of this interstop;
 670                 // distribute the force between the two endstops so that they
 671                 // get all the painting even if they are not touched by the brush
 672                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 673                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 674                                   do_h, do_s, do_l);
 675                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 676                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 677                                   do_h, do_s, do_l);
 678                 SP_OBJECT(stop)->updateRepr();
 679                 child_prev->updateRepr();
 680                 break;
 681             } else {
 682                 // wide brush, may affect more than 2 stops,
 683                 // paint each stop by the force from the profile curve
 684                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 685                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 686                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 687                                  do_h, do_s, do_l);
 688                     child_prev->updateRepr();
 689                 }
 690
 691                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 692                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 693                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 694                                  do_h, do_s, do_l);
 695                     SP_OBJECT(stop)->updateRepr();
 696                 }
 697             }
 698         }
 699
 700         offset_l = offset_h;
 701         child_prev = child;
 702     }
 703 }
 704
 705 bool
 706 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 707                           guint32 fill_goal, bool do_fill,
 708                           guint32 stroke_goal, bool do_stroke,
 709                           float opacity_goal, bool do_opacity,
 710                           NR::Point p, double radius, double force,
 711                           bool do_h, bool do_s, bool do_l, bool do_o)
 712 {
 713     bool did = false;
 714
 715     if (SP_IS_GROUP(item)) {
 716         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 717             if (SP_IS_ITEM(child)) {
 718                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 719                                           fill_goal, do_fill,
 720                                           stroke_goal, do_stroke,
 721                                           opacity_goal, do_opacity,
 722                                           p, radius, force, do_h, do_s, do_l, do_o));
 723                     did = true;
 724             }
 725         }
 726
 727     } else {
 728         SPStyle *style = SP_OBJECT_STYLE(item);
 729         if (!style) {
 730             return false;
 731         }
 732         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item),
 733                                                         SPItem::GEOMETRIC_BBOX);
 734         if (!bbox) {
 735             return false;
 736         }
 737
 738         NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));
 739
 740         NR::Point center = bbox->midpoint();
 741         double this_force;
 742
 743 // if item == item_at_point, use max force
 744         if (item == item_at_point) {
 745             this_force = force;
 746 // else if no overlap of bbox and brush box, skip:
 747         } else if (!bbox->intersects(brush)) {
 748             return false;
 749 //TODO:
 750 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 751         //} else if (bbox->maxExtent() > 3 * radius) {
 752         //}
 753 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 754 // else if still smaller, then check only the object center:
 755         } else {
 756             this_force = force * tweak_profile (NR::L2 (p - center), radius);
 757         }
 758
 759         if (this_force > 0.002) {
 760
 761             if (do_fill) {
 762                 if (style->fill.isPaintserver()) {
 763                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 764                     did = true;
 765                 } else if (style->fill.isColor()) {
 766                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
 767                     item->updateRepr();
 768                     did = true;
 769                 }
 770             }
 771             if (do_stroke) {
 772                 if (style->stroke.isPaintserver()) {
 773                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 774                     did = true;
 775                 } else if (style->stroke.isColor()) {
 776                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
 777                     item->updateRepr();
 778                     did = true;
 779                 }
 780             }
 781             if (do_opacity && do_o) {
 782                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
 783             }
 784         }
 785     }
 786
 787     return did;
 788 }
 789
 790
 791 bool
 792 sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)
 793 {
 794     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 795
 796     if (selection->isEmpty()) {
 797         return false;
 798     }
 799
 800     bool did = false;
 801     double radius = get_dilate_radius(tc);
 802     double force = get_dilate_force(tc);
 803     if (radius == 0 || force == 0) {
 804         return false;
 805     }
 806     double color_force = MIN(sqrt(force)/20.0, 1);
 807
 808     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
 809     Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.tweak");
 810     SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
 811     if (tc->mode == TWEAK_MODE_COLORPAINT && !css)
 812         return false;
 813
 814     bool do_fill = false, do_stroke = false, do_opacity = false;
 815     guint32 fill_goal = 0, stroke_goal = 0;
 816     float opacity_goal = 1;
 817
 818     const gchar *fill_prop = sp_repr_css_property(css, "fill", NULL);
 819     if (fill_prop && strcmp(fill_prop, "none")) {
 820         do_fill = true;
 821         fill_goal = sp_svg_read_color(fill_prop, 0);
 822     }
 823     const gchar *stroke_prop = sp_repr_css_property(css, "stroke", NULL);
 824     if (stroke_prop && strcmp(stroke_prop, "none")) {
 825         do_stroke = true;
 826         stroke_goal = sp_svg_read_color(stroke_prop, 0);
 827     }
 828     const gchar *opacity_prop = sp_repr_css_property(css, "opacity", NULL);
 829     if (opacity_prop) {
 830         do_opacity = true;
 831         sp_svg_number_read_f(opacity_prop, &opacity_goal);
 832     }
 833
 834     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 835          items != NULL;
 836          items = items->next) {
 837
 838         SPItem *item = (SPItem *) items->data;
 839
 840         if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {
 841             if (do_fill || do_stroke || do_opacity) {
 842                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
 843                                           fill_goal, do_fill,
 844                                           stroke_goal, do_stroke,
 845                                           opacity_goal, do_opacity,
 846                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
 847                 did = true;
 848             }
 849         } else {
 850             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 851                 did = true;
 852         }
 853     }
 854
 855     return did;
 856 }
 857
 858 void
 859 sp_tweak_update_area (SPTweakContext *tc)
 860 {
 861         double radius = get_dilate_radius(tc);
 862         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 863         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 864         sp_canvas_item_show(tc->dilate_area);
 865 }
 866
 867 void
 868 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 869 {
 870     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 871     // need to set explicitly, because the prefs may not have changed by the previous
 872     tc->mode = mode;
 873     sp_tweak_update_cursor (tc, mode);
 874 }
 875
 876 void
 877 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 878 {
 879    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 880    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 881    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 882    // button has changed prefs, restore
 883    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 884    // changing prefs changed tc->mode, restore back :)
 885    tc->mode = mode;
 886    sp_tweak_update_cursor (tc, mode);
 887 }
 888
 889 gint
 890 sp_tweak_context_root_handler(SPEventContext *event_context,
 891                                   GdkEvent *event)
 892 {
 893     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 894     SPDesktop *desktop = event_context->desktop;
 895
 896     gint ret = FALSE;
 897
 898     switch (event->type) {
 899         case GDK_ENTER_NOTIFY:
 900             sp_canvas_item_show(tc->dilate_area);
 901             break;
 902         case GDK_LEAVE_NOTIFY:
 903             sp_canvas_item_hide(tc->dilate_area);
 904             break;
 905         case GDK_BUTTON_PRESS:
 906             if (event->button.button == 1 && !event_context->space_panning) {
 907
 908                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 909                     return TRUE;
 910                 }
 911
 912                 NR::Point const button_w(event->button.x,
 913                                          event->button.y);
 914                 NR::Point const button_dt(desktop->w2d(button_w));
 915                 tc->last_push = desktop->dt2doc(button_dt);
 916
 917                 sp_tweak_extinput(tc, event);
 918
 919                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 920                 tc->is_drawing = true;
 921                 tc->is_dilating = true;
 922                 tc->has_dilated = false;
 923
 924                 ret = TRUE;
 925             }
 926             break;
 927         case GDK_MOTION_NOTIFY:
 928         {
 929             NR::Point const motion_w(event->motion.x,
 930                                      event->motion.y);
 931             NR::Point motion_dt(desktop->w2d(motion_w));
 932             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 933             sp_tweak_extinput(tc, event);
 934
 935             // draw the dilating cursor
 936                 double radius = get_dilate_radius(tc);
 937                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 938                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 939                 sp_canvas_item_show(tc->dilate_area);
 940
 941                 guint num = 0;
 942                 if (!desktop->selection->isEmpty()) {
 943                     num = g_slist_length((GSList *) desktop->selection->itemList());
 944                 }
 945                 if (num == 0) {
 946                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
 947                 } else {
 948                     switch (tc->mode) {
 949                         case TWEAK_MODE_PUSH:
 950                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 951                                                       ngettext("<b>Pushing %d</b> selected object",
 952                                                       "<b>Pushing %d</b> selected objects", num), num);
 953                            break;
 954                         case TWEAK_MODE_SHRINK:
 955                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 956                                                       ngettext("<b>Shrinking %d</b> selected object",
 957                                                       "<b>Shrinking %d</b> selected objects", num), num);
 958                            break;
 959                         case TWEAK_MODE_GROW:
 960                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 961                                                       ngettext("<b>Growing %d</b> selected object",
 962                                                       "<b>Growing %d</b> selected objects", num), num);
 963                            break;
 964                         case TWEAK_MODE_ATTRACT:
 965                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 966                                                       ngettext("<b>Attracting %d</b> selected object",
 967                                                       "<b>Attracting %d</b> selected objects", num), num);
 968                            break;
 969                         case TWEAK_MODE_REPEL:
 970                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 971                                                       ngettext("<b>Repelling %d</b> selected object",
 972                                                       "<b>Repelling %d</b> selected objects", num), num);
 973                            break;
 974                         case TWEAK_MODE_ROUGHEN:
 975                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 976                                                       ngettext("<b>Roughening %d</b> selected object",
 977                                                       "<b>Roughening %d</b> selected objects", num), num);
 978                         case TWEAK_MODE_COLORPAINT:
 979                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 980                                                       ngettext("<b>Painting %d</b> selected object",
 981                                                       "<b>Painting %d</b> selected objects", num), num);
 982                            break;
 983                         case TWEAK_MODE_COLORJITTER:
 984                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 985                                                       ngettext("<b>Jittering colors in %d</b> selected object",
 986                                                       "<b>Jittering colors in %d</b> selected objects", num), num);
 987                            break;
 988                     }
 989                 }
 990
 991
 992             // dilating:
 993             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
 994                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);
 995                 //tc->last_push = motion_doc;
 996                 tc->has_dilated = true;
 997                 // it's slow, so prevent clogging up with events
 998                 gobble_motion_events(GDK_BUTTON1_MASK);
 999                 return TRUE;
1000             }
1001
1002         }
1003         break;
1004
1005
1006     case GDK_BUTTON_RELEASE:
1007     {
1008         NR::Point const motion_w(event->button.x, event->button.y);
1009         NR::Point const motion_dt(desktop->w2d(motion_w));
1010
1011         sp_canvas_end_forced_full_redraws(desktop->canvas);
1012         tc->is_drawing = false;
1013
1014         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1015             if (!tc->has_dilated) {
1016                 // if we did not rub, do a light tap
1017                 tc->pressure = 0.03;
1018                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));
1019             }
1020             tc->is_dilating = false;
1021             tc->has_dilated = false;
1022             switch (tc->mode) {
1023                 case TWEAK_MODE_PUSH:
1024                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1025                                      SP_VERB_CONTEXT_TWEAK, _("Push tweak"));
1026                     break;
1027                 case TWEAK_MODE_SHRINK:
1028                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1029                                      SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));
1030                     break;
1031                 case TWEAK_MODE_GROW:
1032                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1033                                      SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));
1034                     break;
1035                 case TWEAK_MODE_ATTRACT:
1036                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1037                                      SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));
1038                     break;
1039                 case TWEAK_MODE_REPEL:
1040                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1041                                      SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));
1042                     break;
1043                 case TWEAK_MODE_ROUGHEN:
1044                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1045                                      SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));
1046                     break;
1047                 case TWEAK_MODE_COLORPAINT:
1048                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1049                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1050                 case TWEAK_MODE_COLORJITTER:
1051                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1052                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1053                     break;
1054             }
1055         }
1056         break;
1057     }
1058
1059     case GDK_KEY_PRESS:
1060         switch (get_group0_keyval (&event->key)) {
1061         case GDK_p:
1062         case GDK_P:
1063         case GDK_1:
1064             if (MOD__SHIFT_ONLY) {
1065                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
1066                 ret = TRUE;
1067             }
1068             break;
1069         case GDK_s:
1070         case GDK_S:
1071         case GDK_2:
1072             if (MOD__SHIFT_ONLY) {
1073                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);
1074                 ret = TRUE;
1075             }
1076             break;
1077         case GDK_g:
1078         case GDK_G:
1079         case GDK_3:
1080             if (MOD__SHIFT_ONLY) {
1081                 sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);
1082                 ret = TRUE;
1083             }
1084             break;
1085         case GDK_a:
1086         case GDK_A:
1087         case GDK_4:
1088             if (MOD__SHIFT_ONLY) {
1089                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);
1090                 ret = TRUE;
1091             }
1092             break;
1093         case GDK_e:
1094         case GDK_E:
1095         case GDK_5:
1096             if (MOD__SHIFT_ONLY) {
1097                 sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);
1098                 ret = TRUE;
1099             }
1100             break;
1101         case GDK_r:
1102         case GDK_R:
1103         case GDK_6:
1104             if (MOD__SHIFT_ONLY) {
1105                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
1106                 ret = TRUE;
1107             }
1108             break;
1109         case GDK_c:
1110         case GDK_C:
1111         case GDK_7:
1112             if (MOD__SHIFT_ONLY) {
1113                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);
1114                 ret = TRUE;
1115             }
1116             break;
1117         case GDK_j:
1118         case GDK_J:
1119         case GDK_8:
1120             if (MOD__SHIFT_ONLY) {
1121                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);
1122                 ret = TRUE;
1123             }
1124             break;
1125
1126         case GDK_Up:
1127         case GDK_KP_Up:
1128             if (!MOD__CTRL_ONLY) {
1129                 tc->force += 0.05;
1130                 if (tc->force > 1.0)
1131                     tc->force = 1.0;
1132                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1133                 ret = TRUE;
1134             }
1135             break;
1136         case GDK_Down:
1137         case GDK_KP_Down:
1138             if (!MOD__CTRL_ONLY) {
1139                 tc->force -= 0.05;
1140                 if (tc->force < 0.0)
1141                     tc->force = 0.0;
1142                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1143                 ret = TRUE;
1144             }
1145             break;
1146         case GDK_Right:
1147         case GDK_KP_Right:
1148             if (!MOD__CTRL_ONLY) {
1149                 tc->width += 0.01;
1150                 if (tc->width > 1.0)
1151                     tc->width = 1.0;
1152                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1153                 sp_tweak_update_area(tc);
1154                 ret = TRUE;
1155             }
1156             break;
1157         case GDK_Left:
1158         case GDK_KP_Left:
1159             if (!MOD__CTRL_ONLY) {
1160                 tc->width -= 0.01;
1161                 if (tc->width < 0.01)
1162                     tc->width = 0.01;
1163                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1164                 sp_tweak_update_area(tc);
1165                 ret = TRUE;
1166             }
1167             break;
1168         case GDK_Home:
1169         case GDK_KP_Home:
1170             tc->width = 0.01;
1171             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1172             sp_tweak_update_area(tc);
1173             ret = TRUE;
1174             break;
1175         case GDK_End:
1176         case GDK_KP_End:
1177             tc->width = 1.0;
1178             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1179             sp_tweak_update_area(tc);
1180             ret = TRUE;
1181             break;
1182         case GDK_x:
1183         case GDK_X:
1184             if (MOD__ALT_ONLY) {
1185                 desktop->setToolboxFocusTo ("altx-tweak");
1186                 ret = TRUE;
1187             }
1188             break;
1189
1190         case GDK_Control_L:
1191         case GDK_Control_R:
1192             if (MOD__SHIFT) {
1193                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1194             } else {
1195                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1196             }
1197             break;
1198         case GDK_Shift_L:
1199         case GDK_Shift_R:
1200             if (MOD__CTRL) {
1201                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1202             }
1203             break;
1204         default:
1205             break;
1206         }
1207         break;
1208
1209     case GDK_KEY_RELEASE:
1210         switch (get_group0_keyval(&event->key)) {
1211             case GDK_Control_L:
1212             case GDK_Control_R:
1213                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1214                 tc->_message_context->clear();
1215                 break;
1216             case GDK_Shift_L:
1217             case GDK_Shift_R:
1218                 if (MOD__CTRL) {
1219                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1220                 }
1221                 break;
1222             break;
1223             default:
1224                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1225                 break;
1226         }
1227
1228     default:
1229         break;
1230     }
1231
1232     if (!ret) {
1233         if (((SPEventContextClass *) parent_class)->root_handler) {
1234             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1235         }
1236     }
1237
1238     return ret;
1239 }
1240
1241
1242 /*
1243   Local Variables:
1244   mode:c++
1245   c-file-style:"stroustrup"
1246   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1247   indent-tabs-mode:nil
1248   fill-column:99
1249   End:
1250 */
1251 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :