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 #include "box3d.h"
  75
  76 #include "tweak-context.h"
  77
  78 #define DDC_RED_RGBA 0xff0000ff
  79
  80 #define DYNA_MIN_WIDTH 1.0e-6
  81
  82 // FIXME: move it to some shared file to be reused by both calligraphy and dropper
  83 #define C1 0.552
  84 static NArtBpath const hatch_area_circle[] = {
  85     { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
  86     { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
  87     { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
  88     { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
  89     { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
  90     { NR_END, 0, 0, 0, 0, 0, 0 }
  91 };
  92 #undef C1
  93
  94
  95 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  96 static void sp_tweak_context_init(SPTweakContext *ddc);
  97 static void sp_tweak_context_dispose(GObject *object);
  98
  99 static void sp_tweak_context_setup(SPEventContext *ec);
 100 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
 101 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
 102
 103 static SPEventContextClass *parent_class;
 104
 105 GtkType
 106 sp_tweak_context_get_type(void)
 107 {
 108     static GType type = 0;
 109     if (!type) {
 110         GTypeInfo info = {
 111             sizeof(SPTweakContextClass),
 112             NULL, NULL,
 113             (GClassInitFunc) sp_tweak_context_class_init,
 114             NULL, NULL,
 115             sizeof(SPTweakContext),
 116             4,
 117             (GInstanceInitFunc) sp_tweak_context_init,
 118             NULL,   /* value_table */
 119         };
 120         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 121     }
 122     return type;
 123 }
 124
 125 static void
 126 sp_tweak_context_class_init(SPTweakContextClass *klass)
 127 {
 128     GObjectClass *object_class = (GObjectClass *) klass;
 129     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 130
 131     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 132
 133     object_class->dispose = sp_tweak_context_dispose;
 134
 135     event_context_class->setup = sp_tweak_context_setup;
 136     event_context_class->set = sp_tweak_context_set;
 137     event_context_class->root_handler = sp_tweak_context_root_handler;
 138 }
 139
 140 static void
 141 sp_tweak_context_init(SPTweakContext *tc)
 142 {
 143     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 144
 145     event_context->cursor_shape = cursor_push_xpm;
 146     event_context->hot_x = 4;
 147     event_context->hot_y = 4;
 148
 149     /* attributes */
 150     tc->dragging = FALSE;
 151
 152     tc->width = 0.2;
 153     tc->force = 0.2;
 154     tc->pressure = TC_DEFAULT_PRESSURE;
 155
 156     tc->is_dilating = false;
 157     tc->has_dilated = false;
 158
 159     tc->do_h = true;
 160     tc->do_s = true;
 161     tc->do_l = true;
 162     tc->do_o = false;
 163
 164     new (&tc->style_set_connection) sigc::connection();
 165 }
 166
 167 static void
 168 sp_tweak_context_dispose(GObject *object)
 169 {
 170     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 171
 172     tc->style_set_connection.disconnect();
 173     tc->style_set_connection.~connection();
 174
 175     if (tc->dilate_area) {
 176         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 177         tc->dilate_area = NULL;
 178     }
 179
 180     if (tc->_message_context) {
 181         delete tc->_message_context;
 182     }
 183
 184     G_OBJECT_CLASS(parent_class)->dispose(object);
 185 }
 186
 187 void
 188 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 189 {
 190     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 191    switch (mode) {
 192        case TWEAK_MODE_PUSH:
 193            event_context->cursor_shape = cursor_push_xpm;
 194            break;
 195        case TWEAK_MODE_SHRINK:
 196            event_context->cursor_shape = cursor_thin_xpm;
 197            break;
 198        case TWEAK_MODE_GROW:
 199            event_context->cursor_shape = cursor_thicken_xpm;
 200            break;
 201        case TWEAK_MODE_ATTRACT:
 202            event_context->cursor_shape = cursor_attract_xpm;
 203            break;
 204        case TWEAK_MODE_REPEL:
 205            event_context->cursor_shape = cursor_repel_xpm;
 206            break;
 207        case TWEAK_MODE_ROUGHEN:
 208            event_context->cursor_shape = cursor_roughen_xpm;
 209            break;
 210        case TWEAK_MODE_COLORPAINT:
 211        case TWEAK_MODE_COLORJITTER:
 212            event_context->cursor_shape = cursor_color_xpm;
 213            break;
 214    }
 215    sp_event_context_update_cursor(event_context);
 216 }
 217
 218 static bool
 219 sp_tweak_context_style_set(SPCSSAttr const *css, SPTweakContext *tc)
 220 {
 221     if (tc->mode == TWEAK_MODE_COLORPAINT) { // intercept color setting only in this mode
 222         // we cannot store properties with uris
 223         css = sp_css_attr_unset_uris ((SPCSSAttr *) css);
 224
 225         sp_repr_css_change (inkscape_get_repr (INKSCAPE, "tools.tweak"), (SPCSSAttr *) css, "style");
 226
 227         return true;
 228     }
 229     return false;
 230 }
 231
 232
 233 static void
 234 sp_tweak_context_setup(SPEventContext *ec)
 235 {
 236     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 237
 238     if (((SPEventContextClass *) parent_class)->setup)
 239         ((SPEventContextClass *) parent_class)->setup(ec);
 240
 241     {
 242         SPCurve *c = sp_curve_new_from_foreign_bpath(hatch_area_circle);
 243         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 244         sp_curve_unref(c);
 245         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 246         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 247         sp_canvas_item_hide(tc->dilate_area);
 248     }
 249
 250     sp_event_context_read(ec, "width");
 251     sp_event_context_read(ec, "mode");
 252     sp_event_context_read(ec, "fidelity");
 253     sp_event_context_read(ec, "force");
 254     sp_event_context_read(ec, "usepressure");
 255     sp_event_context_read(ec, "doh");
 256     sp_event_context_read(ec, "dol");
 257     sp_event_context_read(ec, "dos");
 258     sp_event_context_read(ec, "doo");
 259
 260     tc->is_drawing = false;
 261
 262     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 263
 264     tc->style_set_connection = ec->desktop->connectSetStyle( // catch style-setting signal in this tool
 265         sigc::bind(sigc::ptr_fun(&sp_tweak_context_style_set), tc)
 266     );
 267
 268     if (prefs_get_int_attribute("tools.tweak", "selcue", 0) != 0) {
 269         ec->enableSelectionCue();
 270     }
 271
 272     if (prefs_get_int_attribute("tools.tweak", "gradientdrag", 0) != 0) {
 273         ec->enableGrDrag();
 274     }
 275 }
 276
 277 static void
 278 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 279 {
 280     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 281
 282     if (!strcmp(key, "width")) {
 283         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 284         tc->width = CLAMP(dval, -1000.0, 1000.0);
 285     } else if (!strcmp(key, "mode")) {
 286         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 287         tc->mode = dval;
 288         sp_tweak_update_cursor(tc, tc->mode);
 289     } else if (!strcmp(key, "fidelity")) {
 290         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 291         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 292     } else if (!strcmp(key, "force")) {
 293         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 294         tc->force = CLAMP(dval, 0, 1.0);
 295     } else if (!strcmp(key, "usepressure")) {
 296         tc->usepressure = (val && strcmp(val, "0"));
 297     } else if (!strcmp(key, "doh")) {
 298         tc->do_h = (val && strcmp(val, "0"));
 299     } else if (!strcmp(key, "dos")) {
 300         tc->do_s = (val && strcmp(val, "0"));
 301     } else if (!strcmp(key, "dol")) {
 302         tc->do_l = (val && strcmp(val, "0"));
 303     } else if (!strcmp(key, "doo")) {
 304         tc->do_o = (val && strcmp(val, "0"));
 305     }
 306 }
 307
 308 static void
 309 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 310 {
 311     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 312         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 313     else
 314         tc->pressure = TC_DEFAULT_PRESSURE;
 315 }
 316
 317 double
 318 get_dilate_radius (SPTweakContext *tc)
 319 {
 320     // 10 times the pen width:
 321     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 322 }
 323
 324 double
 325 get_dilate_force (SPTweakContext *tc)
 326 {
 327     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 328         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 329     if (force > 3) {
 330         force += 4 * (force - 3);
 331     }
 332     return force * tc->force;
 333 }
 334
 335 bool
 336 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 337 {
 338     bool did = false;
 339
 340     if (SP_IS_BOX3D(item)) {
 341         // convert 3D boxes to ordinary groups before tweaking their shapes
 342         item = SP_ITEM(box3d_convert_to_group(SP_BOX3D(item)));
 343         selection->add(item);
 344     }
 345
 346     if (SP_IS_GROUP(item)) {
 347         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 348             if (SP_IS_ITEM(child)) {
 349                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 350                     did = true;
 351             }
 352         }
 353
 354     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 355
 356         Inkscape::XML::Node *newrepr = NULL;
 357         gint pos = 0;
 358         Inkscape::XML::Node *parent = NULL;
 359         char const *id = NULL;
 360         if (!SP_IS_PATH(item)) {
 361             newrepr = sp_selected_item_to_curved_repr(item, 0);
 362             if (!newrepr)
 363                 return false;
 364
 365             // remember the position of the item
 366             pos = SP_OBJECT_REPR(item)->position();
 367             // remember parent
 368             parent = SP_OBJECT_REPR(item)->parent();
 369             // remember id
 370             id = SP_OBJECT_REPR(item)->attribute("id");
 371         }
 372
 373
 374         // skip those paths whose bboxes are entirely out of reach with our radius
 375         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));
 376         if (bbox) {
 377             bbox->growBy(radius);
 378             if (!bbox->contains(p)) {
 379                 return false;
 380             }
 381         }
 382
 383         Path *orig = Path_for_item(item, false);
 384         if (orig == NULL) {
 385             return false;
 386         }
 387
 388         Path *res = new Path;
 389         res->SetBackData(false);
 390
 391         Shape *theShape = new Shape;
 392         Shape *theRes = new Shape;
 393         NR::Matrix i2doc(sp_item_i2doc_affine(item));
 394
 395         orig->ConvertWithBackData((0.08 - (0.07 * fidelity)) / i2doc.expansion()); // default 0.059
 396         orig->Fill(theShape, 0);
 397
 398         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 399         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 400         if (val && strcmp(val, "nonzero") == 0)
 401         {
 402             theRes->ConvertToShape(theShape, fill_nonZero);
 403         }
 404         else if (val && strcmp(val, "evenodd") == 0)
 405         {
 406             theRes->ConvertToShape(theShape, fill_oddEven);
 407         }
 408         else
 409         {
 410             theRes->ConvertToShape(theShape, fill_nonZero);
 411         }
 412
 413         if (NR::L2(vector) != 0)
 414             vector = 1/NR::L2(vector) * vector;
 415
 416         bool did_this = false;
 417         if (mode == TWEAK_MODE_SHRINK || mode == TWEAK_MODE_GROW) {
 418             if (theShape->MakeTweak(tweak_mode_grow, theRes,
 419                                  mode == TWEAK_MODE_GROW? force : -force,
 420                                  join_straight, 4.0,
 421                                  true, p, NR::Point(0,0), radius, &i2doc) == 0) // 0 means the shape was actually changed
 422               did_this = true;
 423         } else if (mode == TWEAK_MODE_ATTRACT || mode == TWEAK_MODE_REPEL) {
 424             if (theShape->MakeTweak(tweak_mode_repel, theRes,
 425                                  mode == TWEAK_MODE_REPEL? force : -force,
 426                                  join_straight, 4.0,
 427                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 428               did_this = true;
 429         } else if (mode == TWEAK_MODE_PUSH) {
 430             if (theShape->MakeTweak(tweak_mode_push, theRes,
 431                                  1.0,
 432                                  join_straight, 4.0,
 433                                  true, p, force*2*vector, radius, &i2doc) == 0)
 434               did_this = true;
 435         } else if (mode == TWEAK_MODE_ROUGHEN) {
 436             if (theShape->MakeTweak(tweak_mode_roughen, theRes,
 437                                  force,
 438                                  join_straight, 4.0,
 439                                  true, p, NR::Point(0,0), radius, &i2doc) == 0)
 440               did_this = true;
 441         }
 442
 443         // the rest only makes sense if we actually changed the path
 444         if (did_this) {
 445             theRes->ConvertToShape(theShape, fill_positive);
 446
 447             res->Reset();
 448             theRes->ConvertToForme(res);
 449
 450             double th_max = (0.6 - 0.59*sqrt(fidelity)) / i2doc.expansion();
 451             double threshold = MAX(th_max, th_max*force);
 452             res->ConvertEvenLines(threshold);
 453             res->Simplify(threshold / (SP_ACTIVE_DESKTOP->current_zoom()));
 454
 455             if (newrepr) { // converting to path, need to replace the repr
 456                 bool is_selected = selection->includes(item);
 457                 if (is_selected)
 458                     selection->remove(item);
 459
 460                 // It's going to resurrect, so we delete without notifying listeners.
 461                 SP_OBJECT(item)->deleteObject(false);
 462
 463                 // restore id
 464                 newrepr->setAttribute("id", id);
 465                 // add the new repr to the parent
 466                 parent->appendChild(newrepr);
 467                 // move to the saved position
 468                 newrepr->setPosition(pos > 0 ? pos : 0);
 469
 470                 if (is_selected)
 471                     selection->add(newrepr);
 472             }
 473
 474             if (res->descr_cmd.size() > 1) {
 475                 gchar *str = res->svg_dump_path();
 476                 if (newrepr) {
 477                     newrepr->setAttribute("d", str);
 478                 } else {
 479                     if (SP_IS_SHAPE(item) && SP_SHAPE(item)->path_effect_href) {
 480                         SP_OBJECT_REPR(item)->setAttribute("inkscape:original-d", str);
 481                     } else {
 482                         SP_OBJECT_REPR(item)->setAttribute("d", str);
 483                     }
 484                 }
 485                 g_free(str);
 486             } else {
 487                 // TODO: if there's 0 or 1 node left, delete this path altogether
 488             }
 489
 490             if (newrepr) {
 491                 Inkscape::GC::release(newrepr);
 492                 newrepr = NULL;
 493             }
 494         }
 495
 496         delete theShape;
 497         delete theRes;
 498         delete orig;
 499         delete res;
 500
 501         if (did_this)
 502             did = true;
 503     }
 504
 505     return did;
 506 }
 507
 508 void
 509 tweak_colorpaint (float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 510 {
 511     float rgb_g[3];
 512
 513     if (!do_h || !do_s || !do_l) {
 514         float hsl_g[3];
 515         sp_color_rgb_to_hsl_floatv (hsl_g, SP_RGBA32_R_F(goal), SP_RGBA32_G_F(goal), SP_RGBA32_B_F(goal));
 516         float hsl_c[3];
 517         sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 518         if (!do_h)
 519             hsl_g[0] = hsl_c[0];
 520         if (!do_s)
 521             hsl_g[1] = hsl_c[1];
 522         if (!do_l)
 523             hsl_g[2] = hsl_c[2];
 524         sp_color_hsl_to_rgb_floatv (rgb_g, hsl_g[0], hsl_g[1], hsl_g[2]);
 525     } else {
 526         rgb_g[0] = SP_RGBA32_R_F(goal);
 527         rgb_g[1] = SP_RGBA32_G_F(goal);
 528         rgb_g[2] = SP_RGBA32_B_F(goal);
 529     }
 530
 531     for (int i = 0; i < 3; i++) {
 532         double d = rgb_g[i] - color[i];
 533         color[i] += d * force;
 534     }
 535 }
 536
 537 void
 538 tweak_colorjitter (float *color, double force, bool do_h, bool do_s, bool do_l)
 539 {
 540     float hsl_c[3];
 541     sp_color_rgb_to_hsl_floatv (hsl_c, color[0], color[1], color[2]);
 542
 543     if (do_h) {
 544         hsl_c[0] += g_random_double_range(-0.5, 0.5) * force;
 545         if (hsl_c[0] > 1)
 546             hsl_c[0] -= 1;
 547         if (hsl_c[0] < 0)
 548             hsl_c[0] += 1;
 549     }
 550     if (do_s) {
 551         hsl_c[1] += g_random_double_range(-hsl_c[1], 1 - hsl_c[1]) * force;
 552     }
 553     if (do_l) {
 554         hsl_c[2] += g_random_double_range(-hsl_c[2], 1 - hsl_c[2]) * force;
 555     }
 556
 557     sp_color_hsl_to_rgb_floatv (color, hsl_c[0], hsl_c[1], hsl_c[2]);
 558 }
 559
 560 void
 561 tweak_color (guint mode, float *color, guint32 goal, double force, bool do_h, bool do_s, bool do_l)
 562 {
 563     if (mode == TWEAK_MODE_COLORPAINT) {
 564         tweak_colorpaint (color, goal, force, do_h, do_s, do_l);
 565     } else if (mode == TWEAK_MODE_COLORJITTER) {
 566         tweak_colorjitter (color, force, do_h, do_s, do_l);
 567     }
 568 }
 569
 570 void
 571 tweak_opacity (guint mode, SPIScale24 *style_opacity, double opacity_goal, double force)
 572 {
 573     double opacity = SP_SCALE24_TO_FLOAT (style_opacity->value);
 574
 575     if (mode == TWEAK_MODE_COLORPAINT) {
 576         double d = opacity_goal - opacity;
 577         opacity += d * force;
 578     } else if (mode == TWEAK_MODE_COLORJITTER) {
 579         opacity += g_random_double_range(-opacity, 1 - opacity) * force;
 580     }
 581
 582     style_opacity->value = SP_SCALE24_FROM_FLOAT(opacity);
 583 }
 584
 585
 586 double
 587 tweak_profile (double dist, double radius)
 588 {
 589     if (radius == 0)
 590         return 0;
 591     double x = dist / radius;
 592     double alpha = 1;
 593     if (x >= 1) {
 594         return 0;
 595     } else if (x <= 0) {
 596         return 1;
 597     } else {
 598         return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
 599     }
 600 }
 601
 602 void
 603 tweak_colors_in_gradient (SPItem *item, bool fill_or_stroke,
 604                           guint32 const rgb_goal, NR::Point p_w, double radius, double force, guint mode,
 605                           bool do_h, bool do_s, bool do_l, bool /*do_o*/)
 606 {
 607     SPGradient *gradient = sp_item_gradient (item, fill_or_stroke);
 608
 609     if (!gradient || !SP_IS_GRADIENT(gradient))
 610         return;
 611
 612     NR::Matrix i2d = sp_item_i2doc_affine (item);
 613     NR::Point p = p_w * i2d.inverse();
 614     p *= (gradient->gradientTransform).inverse();
 615     // now p is in gradient's original coordinates
 616
 617     double pos = 0;
 618     double r = 0;
 619     if (SP_IS_LINEARGRADIENT(gradient)) {
 620         SPLinearGradient *lg = SP_LINEARGRADIENT(gradient);
 621
 622         NR::Point p1(lg->x1.computed, lg->y1.computed);
 623         NR::Point p2(lg->x2.computed, lg->y2.computed);
 624         NR::Point pdiff(p2 - p1);
 625         double vl = NR::L2(pdiff);
 626
 627         // This is the matrix which moves and rotates the gradient line
 628         // so it's oriented along the X axis:
 629         NR::Matrix norm = NR::Matrix(NR::translate(-p1)) * NR::Matrix(NR::rotate(-atan2(pdiff[NR::Y], pdiff[NR::X])));
 630
 631         // Transform the mouse point by it to find out its projection onto the gradient line:
 632         NR::Point pnorm = p * norm;
 633
 634         // Scale its X coordinate to match the length of the gradient line:
 635         pos = pnorm[NR::X] / vl;
 636         // Calculate radius in lenfth-of-gradient-line units
 637         r = radius / vl;
 638
 639     } else if (SP_IS_RADIALGRADIENT(gradient)) {
 640         SPRadialGradient *rg = SP_RADIALGRADIENT(gradient);
 641         NR::Point c (rg->cx.computed, rg->cy.computed);
 642         pos = NR::L2(p - c) / rg->r.computed;
 643         r = radius / rg->r.computed;
 644     }
 645
 646     // Normalize pos to 0..1, taking into accound gradient spread:
 647     double pos_e = pos;
 648     if (gradient->spread == SP_GRADIENT_SPREAD_PAD) {
 649         if (pos > 1)
 650             pos_e = 1;
 651         if (pos < 0)
 652             pos_e = 0;
 653     } else if (gradient->spread == SP_GRADIENT_SPREAD_REPEAT) {
 654         if (pos > 1 || pos < 0)
 655             pos_e = pos - floor(pos);
 656     } else if (gradient->spread == SP_GRADIENT_SPREAD_REFLECT) {
 657         if (pos > 1 || pos < 0) {
 658             bool odd = ((int)(floor(pos)) % 2 == 1);
 659             pos_e = pos - floor(pos);
 660             if (odd)
 661                 pos_e = 1 - pos_e;
 662         }
 663     }
 664
 665     SPGradient *vector = sp_gradient_get_forked_vector_if_necessary(gradient, false);
 666
 667     double offset_l = 0;
 668     double offset_h = 0;
 669     SPObject *child_prev = NULL;
 670     for (SPObject *child = sp_object_first_child(vector);
 671          child != NULL; child = SP_OBJECT_NEXT(child)) {
 672         if (!SP_IS_STOP(child))
 673             continue;
 674         SPStop *stop = SP_STOP (child);
 675
 676         offset_h = stop->offset;
 677
 678         if (child_prev) {
 679
 680             if (offset_h - offset_l > r && pos_e >= offset_l && pos_e <= offset_h) {
 681                 // the summit falls in this interstop, and the radius is small,
 682                 // so it only affects the ends of this interstop;
 683                 // distribute the force between the two endstops so that they
 684                 // get all the painting even if they are not touched by the brush
 685                 tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 686                                   force * (pos_e - offset_l) / (offset_h - offset_l),
 687                                   do_h, do_s, do_l);
 688                 tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 689                                   force * (offset_h - pos_e) / (offset_h - offset_l),
 690                                   do_h, do_s, do_l);
 691                 SP_OBJECT(stop)->updateRepr();
 692                 child_prev->updateRepr();
 693                 break;
 694             } else {
 695                 // wide brush, may affect more than 2 stops,
 696                 // paint each stop by the force from the profile curve
 697                 if (offset_l <= pos_e && offset_l > pos_e - r) {
 698                     tweak_color (mode, SP_STOP(child_prev)->specified_color.v.c, rgb_goal,
 699                                  force * tweak_profile (fabs (pos_e - offset_l), r),
 700                                  do_h, do_s, do_l);
 701                     child_prev->updateRepr();
 702                 }
 703
 704                 if (offset_h >= pos_e && offset_h < pos_e + r) {
 705                     tweak_color (mode, stop->specified_color.v.c, rgb_goal,
 706                                  force * tweak_profile (fabs (pos_e - offset_h), r),
 707                                  do_h, do_s, do_l);
 708                     SP_OBJECT(stop)->updateRepr();
 709                 }
 710             }
 711         }
 712
 713         offset_l = offset_h;
 714         child_prev = child;
 715     }
 716 }
 717
 718 bool
 719 sp_tweak_color_recursive (guint mode, SPItem *item, SPItem *item_at_point,
 720                           guint32 fill_goal, bool do_fill,
 721                           guint32 stroke_goal, bool do_stroke,
 722                           float opacity_goal, bool do_opacity,
 723                           NR::Point p, double radius, double force,
 724                           bool do_h, bool do_s, bool do_l, bool do_o)
 725 {
 726     bool did = false;
 727
 728     if (SP_IS_GROUP(item)) {
 729         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 730             if (SP_IS_ITEM(child)) {
 731                 if (sp_tweak_color_recursive (mode, SP_ITEM(child), item_at_point,
 732                                           fill_goal, do_fill,
 733                                           stroke_goal, do_stroke,
 734                                           opacity_goal, do_opacity,
 735                                           p, radius, force, do_h, do_s, do_l, do_o));
 736                     did = true;
 737             }
 738         }
 739
 740     } else {
 741         SPStyle *style = SP_OBJECT_STYLE(item);
 742         if (!style) {
 743             return false;
 744         }
 745         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item),
 746                                                         SPItem::GEOMETRIC_BBOX);
 747         if (!bbox) {
 748             return false;
 749         }
 750
 751         NR::Rect brush(p - NR::Point(radius, radius), p + NR::Point(radius, radius));
 752
 753         NR::Point center = bbox->midpoint();
 754         double this_force;
 755
 756 // if item == item_at_point, use max force
 757         if (item == item_at_point) {
 758             this_force = force;
 759 // else if no overlap of bbox and brush box, skip:
 760         } else if (!bbox->intersects(brush)) {
 761             return false;
 762 //TODO:
 763 // else if object > 1.5 brush: test 4/8/16 points in the brush on hitting the object, choose max
 764         //} else if (bbox->maxExtent() > 3 * radius) {
 765         //}
 766 // else if object > 0.5 brush: test 4 corners of bbox and center on being in the brush, choose max
 767 // else if still smaller, then check only the object center:
 768         } else {
 769             this_force = force * tweak_profile (NR::L2 (p - center), radius);
 770         }
 771
 772         if (this_force > 0.002) {
 773
 774             if (do_fill) {
 775                 if (style->fill.isPaintserver()) {
 776                     tweak_colors_in_gradient (item, true, fill_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 777                     did = true;
 778                 } else if (style->fill.isColor()) {
 779                     tweak_color (mode, style->fill.value.color.v.c, fill_goal, this_force, do_h, do_s, do_l);
 780                     item->updateRepr();
 781                     did = true;
 782                 }
 783             }
 784             if (do_stroke) {
 785                 if (style->stroke.isPaintserver()) {
 786                     tweak_colors_in_gradient (item, false, stroke_goal, p, radius, this_force, mode, do_h, do_s, do_l, do_o);
 787                     did = true;
 788                 } else if (style->stroke.isColor()) {
 789                     tweak_color (mode, style->stroke.value.color.v.c, stroke_goal, this_force, do_h, do_s, do_l);
 790                     item->updateRepr();
 791                     did = true;
 792                 }
 793             }
 794             if (do_opacity && do_o) {
 795                 tweak_opacity (mode, &style->opacity, opacity_goal, this_force);
 796             }
 797         }
 798     }
 799
 800     return did;
 801 }
 802
 803
 804 bool
 805 sp_tweak_dilate (SPTweakContext *tc, NR::Point event_p, NR::Point p, NR::Point vector)
 806 {
 807     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 808
 809     if (selection->isEmpty()) {
 810         return false;
 811     }
 812
 813     bool did = false;
 814     double radius = get_dilate_radius(tc);
 815     double force = get_dilate_force(tc);
 816     if (radius == 0 || force == 0) {
 817         return false;
 818     }
 819     double color_force = MIN(sqrt(force)/20.0, 1);
 820
 821     SPItem *item_at_point = SP_EVENT_CONTEXT(tc)->desktop->item_at_point(event_p, TRUE);
 822     Inkscape::XML::Node *tool_repr = inkscape_get_repr(INKSCAPE, "tools.tweak");
 823     SPCSSAttr *css = sp_repr_css_attr_inherited(tool_repr, "style");
 824     if (tc->mode == TWEAK_MODE_COLORPAINT && !css)
 825         return false;
 826
 827     bool do_fill = false, do_stroke = false, do_opacity = false;
 828     guint32 fill_goal = 0, stroke_goal = 0;
 829     float opacity_goal = 1;
 830
 831     const gchar *fill_prop = sp_repr_css_property(css, "fill", NULL);
 832     if (fill_prop && strcmp(fill_prop, "none")) {
 833         do_fill = true;
 834         fill_goal = sp_svg_read_color(fill_prop, 0);
 835     }
 836     const gchar *stroke_prop = sp_repr_css_property(css, "stroke", NULL);
 837     if (stroke_prop && strcmp(stroke_prop, "none")) {
 838         do_stroke = true;
 839         stroke_goal = sp_svg_read_color(stroke_prop, 0);
 840     }
 841     const gchar *opacity_prop = sp_repr_css_property(css, "opacity", NULL);
 842     if (opacity_prop) {
 843         do_opacity = true;
 844         sp_svg_number_read_f(opacity_prop, &opacity_goal);
 845     }
 846
 847     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 848          items != NULL;
 849          items = items->next) {
 850
 851         SPItem *item = (SPItem *) items->data;
 852
 853         if (tc->mode == TWEAK_MODE_COLORPAINT || tc->mode == TWEAK_MODE_COLORJITTER) {
 854             if (do_fill || do_stroke || do_opacity) {
 855                 if (sp_tweak_color_recursive (tc->mode, item, item_at_point,
 856                                           fill_goal, do_fill,
 857                                           stroke_goal, do_stroke,
 858                                           opacity_goal, do_opacity,
 859                                           p, radius, color_force, tc->do_h, tc->do_s, tc->do_l, tc->do_o))
 860                 did = true;
 861             }
 862         } else {
 863             if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 864                 did = true;
 865         }
 866     }
 867
 868     return did;
 869 }
 870
 871 void
 872 sp_tweak_update_area (SPTweakContext *tc)
 873 {
 874         double radius = get_dilate_radius(tc);
 875         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 876         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 877         sp_canvas_item_show(tc->dilate_area);
 878 }
 879
 880 void
 881 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 882 {
 883     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 884     // need to set explicitly, because the prefs may not have changed by the previous
 885     tc->mode = mode;
 886     sp_tweak_update_cursor (tc, mode);
 887 }
 888
 889 void
 890 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 891 {
 892    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 893    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 894    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 895    // button has changed prefs, restore
 896    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 897    // changing prefs changed tc->mode, restore back :)
 898    tc->mode = mode;
 899    sp_tweak_update_cursor (tc, mode);
 900 }
 901
 902 gint
 903 sp_tweak_context_root_handler(SPEventContext *event_context,
 904                                   GdkEvent *event)
 905 {
 906     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 907     SPDesktop *desktop = event_context->desktop;
 908
 909     gint ret = FALSE;
 910
 911     switch (event->type) {
 912         case GDK_ENTER_NOTIFY:
 913             sp_canvas_item_show(tc->dilate_area);
 914             break;
 915         case GDK_LEAVE_NOTIFY:
 916             sp_canvas_item_hide(tc->dilate_area);
 917             break;
 918         case GDK_BUTTON_PRESS:
 919             if (event->button.button == 1 && !event_context->space_panning) {
 920
 921                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 922                     return TRUE;
 923                 }
 924
 925                 NR::Point const button_w(event->button.x,
 926                                          event->button.y);
 927                 NR::Point const button_dt(desktop->w2d(button_w));
 928                 tc->last_push = desktop->dt2doc(button_dt);
 929
 930                 sp_tweak_extinput(tc, event);
 931
 932                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 933                 tc->is_drawing = true;
 934                 tc->is_dilating = true;
 935                 tc->has_dilated = false;
 936
 937                 ret = TRUE;
 938             }
 939             break;
 940         case GDK_MOTION_NOTIFY:
 941         {
 942             NR::Point const motion_w(event->motion.x,
 943                                      event->motion.y);
 944             NR::Point motion_dt(desktop->w2d(motion_w));
 945             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 946             sp_tweak_extinput(tc, event);
 947
 948             // draw the dilating cursor
 949                 double radius = get_dilate_radius(tc);
 950                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 951                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 952                 sp_canvas_item_show(tc->dilate_area);
 953
 954                 guint num = 0;
 955                 if (!desktop->selection->isEmpty()) {
 956                     num = g_slist_length((GSList *) desktop->selection->itemList());
 957                 }
 958                 if (num == 0) {
 959                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Nothing selected!</b> Select objects to tweak."));
 960                 } else {
 961                     switch (tc->mode) {
 962                         case TWEAK_MODE_PUSH:
 963                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 964                                                       ngettext("<b>Pushing %d</b> selected object",
 965                                                       "<b>Pushing %d</b> selected objects", num), num);
 966                            break;
 967                         case TWEAK_MODE_SHRINK:
 968                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 969                                                       ngettext("<b>Shrinking %d</b> selected object",
 970                                                       "<b>Shrinking %d</b> selected objects", num), num);
 971                            break;
 972                         case TWEAK_MODE_GROW:
 973                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 974                                                       ngettext("<b>Growing %d</b> selected object",
 975                                                       "<b>Growing %d</b> selected objects", num), num);
 976                            break;
 977                         case TWEAK_MODE_ATTRACT:
 978                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 979                                                       ngettext("<b>Attracting %d</b> selected object",
 980                                                       "<b>Attracting %d</b> selected objects", num), num);
 981                            break;
 982                         case TWEAK_MODE_REPEL:
 983                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 984                                                       ngettext("<b>Repelling %d</b> selected object",
 985                                                       "<b>Repelling %d</b> selected objects", num), num);
 986                            break;
 987                         case TWEAK_MODE_ROUGHEN:
 988                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 989                                                       ngettext("<b>Roughening %d</b> selected object",
 990                                                       "<b>Roughening %d</b> selected objects", num), num);
 991                         case TWEAK_MODE_COLORPAINT:
 992                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 993                                                       ngettext("<b>Painting %d</b> selected object",
 994                                                       "<b>Painting %d</b> selected objects", num), num);
 995                            break;
 996                         case TWEAK_MODE_COLORJITTER:
 997                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 998                                                       ngettext("<b>Jittering colors in %d</b> selected object",
 999                                                       "<b>Jittering colors in %d</b> selected objects", num), num);
1000                            break;
1001                     }
1002                 }
1003
1004
1005             // dilating:
1006             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
1007                 sp_tweak_dilate (tc, motion_w, motion_doc, motion_doc - tc->last_push);
1008                 //tc->last_push = motion_doc;
1009                 tc->has_dilated = true;
1010                 // it's slow, so prevent clogging up with events
1011                 gobble_motion_events(GDK_BUTTON1_MASK);
1012                 return TRUE;
1013             }
1014
1015         }
1016         break;
1017
1018
1019     case GDK_BUTTON_RELEASE:
1020     {
1021         NR::Point const motion_w(event->button.x, event->button.y);
1022         NR::Point const motion_dt(desktop->w2d(motion_w));
1023
1024         sp_canvas_end_forced_full_redraws(desktop->canvas);
1025         tc->is_drawing = false;
1026
1027         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
1028             if (!tc->has_dilated) {
1029                 // if we did not rub, do a light tap
1030                 tc->pressure = 0.03;
1031                 sp_tweak_dilate (tc, motion_w, desktop->dt2doc(motion_dt), NR::Point(0,0));
1032             }
1033             tc->is_dilating = false;
1034             tc->has_dilated = false;
1035             switch (tc->mode) {
1036                 case TWEAK_MODE_PUSH:
1037                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1038                                      SP_VERB_CONTEXT_TWEAK, _("Push tweak"));
1039                     break;
1040                 case TWEAK_MODE_SHRINK:
1041                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1042                                      SP_VERB_CONTEXT_TWEAK, _("Shrink tweak"));
1043                     break;
1044                 case TWEAK_MODE_GROW:
1045                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1046                                      SP_VERB_CONTEXT_TWEAK, _("Grow tweak"));
1047                     break;
1048                 case TWEAK_MODE_ATTRACT:
1049                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1050                                      SP_VERB_CONTEXT_TWEAK, _("Attract tweak"));
1051                     break;
1052                 case TWEAK_MODE_REPEL:
1053                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1054                                      SP_VERB_CONTEXT_TWEAK, _("Repel tweak"));
1055                     break;
1056                 case TWEAK_MODE_ROUGHEN:
1057                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1058                                      SP_VERB_CONTEXT_TWEAK, _("Roughen tweak"));
1059                     break;
1060                 case TWEAK_MODE_COLORPAINT:
1061                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1062                                      SP_VERB_CONTEXT_TWEAK, _("Color paint tweak"));
1063                 case TWEAK_MODE_COLORJITTER:
1064                     sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
1065                                      SP_VERB_CONTEXT_TWEAK, _("Color jitter tweak"));
1066                     break;
1067             }
1068         }
1069         break;
1070     }
1071
1072     case GDK_KEY_PRESS:
1073         switch (get_group0_keyval (&event->key)) {
1074         case GDK_p:
1075         case GDK_P:
1076         case GDK_1:
1077             if (MOD__SHIFT_ONLY) {
1078                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
1079                 ret = TRUE;
1080             }
1081             break;
1082         case GDK_s:
1083         case GDK_S:
1084         case GDK_2:
1085             if (MOD__SHIFT_ONLY) {
1086                 sp_tweak_switch_mode(tc, TWEAK_MODE_SHRINK);
1087                 ret = TRUE;
1088             }
1089             break;
1090         case GDK_g:
1091         case GDK_G:
1092         case GDK_3:
1093             if (MOD__SHIFT_ONLY) {
1094                 sp_tweak_switch_mode(tc, TWEAK_MODE_GROW);
1095                 ret = TRUE;
1096             }
1097             break;
1098         case GDK_a:
1099         case GDK_A:
1100         case GDK_4:
1101             if (MOD__SHIFT_ONLY) {
1102                 sp_tweak_switch_mode(tc, TWEAK_MODE_ATTRACT);
1103                 ret = TRUE;
1104             }
1105             break;
1106         case GDK_e:
1107         case GDK_E:
1108         case GDK_5:
1109             if (MOD__SHIFT_ONLY) {
1110                 sp_tweak_switch_mode(tc, TWEAK_MODE_REPEL);
1111                 ret = TRUE;
1112             }
1113             break;
1114         case GDK_r:
1115         case GDK_R:
1116         case GDK_6:
1117             if (MOD__SHIFT_ONLY) {
1118                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
1119                 ret = TRUE;
1120             }
1121             break;
1122         case GDK_c:
1123         case GDK_C:
1124         case GDK_7:
1125             if (MOD__SHIFT_ONLY) {
1126                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORPAINT);
1127                 ret = TRUE;
1128             }
1129             break;
1130         case GDK_j:
1131         case GDK_J:
1132         case GDK_8:
1133             if (MOD__SHIFT_ONLY) {
1134                 sp_tweak_switch_mode(tc, TWEAK_MODE_COLORJITTER);
1135                 ret = TRUE;
1136             }
1137             break;
1138
1139         case GDK_Up:
1140         case GDK_KP_Up:
1141             if (!MOD__CTRL_ONLY) {
1142                 tc->force += 0.05;
1143                 if (tc->force > 1.0)
1144                     tc->force = 1.0;
1145                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1146                 ret = TRUE;
1147             }
1148             break;
1149         case GDK_Down:
1150         case GDK_KP_Down:
1151             if (!MOD__CTRL_ONLY) {
1152                 tc->force -= 0.05;
1153                 if (tc->force < 0.0)
1154                     tc->force = 0.0;
1155                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
1156                 ret = TRUE;
1157             }
1158             break;
1159         case GDK_Right:
1160         case GDK_KP_Right:
1161             if (!MOD__CTRL_ONLY) {
1162                 tc->width += 0.01;
1163                 if (tc->width > 1.0)
1164                     tc->width = 1.0;
1165                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
1166                 sp_tweak_update_area(tc);
1167                 ret = TRUE;
1168             }
1169             break;
1170         case GDK_Left:
1171         case GDK_KP_Left:
1172             if (!MOD__CTRL_ONLY) {
1173                 tc->width -= 0.01;
1174                 if (tc->width < 0.01)
1175                     tc->width = 0.01;
1176                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1177                 sp_tweak_update_area(tc);
1178                 ret = TRUE;
1179             }
1180             break;
1181         case GDK_Home:
1182         case GDK_KP_Home:
1183             tc->width = 0.01;
1184             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1185             sp_tweak_update_area(tc);
1186             ret = TRUE;
1187             break;
1188         case GDK_End:
1189         case GDK_KP_End:
1190             tc->width = 1.0;
1191             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
1192             sp_tweak_update_area(tc);
1193             ret = TRUE;
1194             break;
1195         case GDK_x:
1196         case GDK_X:
1197             if (MOD__ALT_ONLY) {
1198                 desktop->setToolboxFocusTo ("altx-tweak");
1199                 ret = TRUE;
1200             }
1201             break;
1202
1203         case GDK_Control_L:
1204         case GDK_Control_R:
1205             if (MOD__SHIFT) {
1206                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1207             } else {
1208                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1209             }
1210             break;
1211         case GDK_Shift_L:
1212         case GDK_Shift_R:
1213             if (MOD__CTRL) {
1214                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_GROW);
1215             }
1216             break;
1217         default:
1218             break;
1219         }
1220         break;
1221
1222     case GDK_KEY_RELEASE:
1223         switch (get_group0_keyval(&event->key)) {
1224             case GDK_Control_L:
1225             case GDK_Control_R:
1226                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1227                 tc->_message_context->clear();
1228                 break;
1229             case GDK_Shift_L:
1230             case GDK_Shift_R:
1231                 if (MOD__CTRL) {
1232                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SHRINK);
1233                 }
1234                 break;
1235             break;
1236             default:
1237                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
1238                 break;
1239         }
1240
1241     default:
1242         break;
1243     }
1244
1245     if (!ret) {
1246         if (((SPEventContextClass *) parent_class)->root_handler) {
1247             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
1248         }
1249     }
1250
1251     return ret;
1252 }
1253
1254
1255 /*
1256   Local Variables:
1257   mode:c++
1258   c-file-style:"stroustrup"
1259   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1260   indent-tabs-mode:nil
1261   fill-column:99
1262   End:
1263 */
1264 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :