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 #define noTWEAK_VERBOSE
  15
  16 #include "config.h"
  17
  18 #include <gtk/gtk.h>
  19 #include <gdk/gdkkeysyms.h>
  20 #include <glibmm/i18n.h>
  21
  22 #include <numeric>
  23
  24 #include "svg/svg.h"
  25 #include "display/canvas-bpath.h"
  26 #include "display/bezier-utils.h"
  27
  28 #include <glib/gmem.h>
  29 #include "macros.h"
  30 #include "document.h"
  31 #include "selection.h"
  32 #include "desktop.h"
  33 #include "desktop-events.h"
  34 #include "desktop-handles.h"
  35 #include "desktop-affine.h"
  36 #include "desktop-style.h"
  37 #include "message-context.h"
  38 #include "pixmaps/cursor-thin.xpm"
  39 #include "pixmaps/cursor-thicken.xpm"
  40 #include "pixmaps/cursor-push.xpm"
  41 #include "pixmaps/cursor-roughen.xpm"
  42 #include "libnr/n-art-bpath.h"
  43 #include "libnr/nr-path.h"
  44 #include "libnr/nr-matrix-ops.h"
  45 #include "libnr/nr-scale-translate-ops.h"
  46 #include "xml/repr.h"
  47 #include "context-fns.h"
  48 #include "sp-item.h"
  49 #include "inkscape.h"
  50 #include "color.h"
  51 #include "splivarot.h"
  52 #include "sp-item-group.h"
  53 #include "sp-shape.h"
  54 #include "sp-path.h"
  55 #include "path-chemistry.h"
  56 #include "sp-text.h"
  57 #include "sp-flowtext.h"
  58 #include "display/canvas-bpath.h"
  59 #include "display/canvas-arena.h"
  60 #include "livarot/Shape.h"
  61 #include "isnan.h"
  62 #include "prefs-utils.h"
  63
  64 #include "tweak-context.h"
  65
  66 #define DDC_RED_RGBA 0xff0000ff
  67
  68 #define DYNA_MIN_WIDTH 1.0e-6
  69
  70 // FIXME: move it to some shared file to be reused by both calligraphy and dropper
  71 #define C1 0.552
  72 static NArtBpath const hatch_area_circle[] = {
  73     { NR_MOVETO, 0, 0, 0, 0, -1, 0 },
  74     { NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
  75     { NR_CURVETO, C1, 1, 1, C1, 1, 0 },
  76     { NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
  77     { NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
  78     { NR_END, 0, 0, 0, 0, 0, 0 }
  79 };
  80 #undef C1
  81
  82
  83 static void sp_tweak_context_class_init(SPTweakContextClass *klass);
  84 static void sp_tweak_context_init(SPTweakContext *ddc);
  85 static void sp_tweak_context_dispose(GObject *object);
  86
  87 static void sp_tweak_context_setup(SPEventContext *ec);
  88 static void sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  89 static gint sp_tweak_context_root_handler(SPEventContext *ec, GdkEvent *event);
  90
  91 static SPEventContextClass *parent_class;
  92
  93 GtkType
  94 sp_tweak_context_get_type(void)
  95 {
  96     static GType type = 0;
  97     if (!type) {
  98         GTypeInfo info = {
  99             sizeof(SPTweakContextClass),
 100             NULL, NULL,
 101             (GClassInitFunc) sp_tweak_context_class_init,
 102             NULL, NULL,
 103             sizeof(SPTweakContext),
 104             4,
 105             (GInstanceInitFunc) sp_tweak_context_init,
 106             NULL,   /* value_table */
 107         };
 108         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPTweakContext", &info, (GTypeFlags)0);
 109     }
 110     return type;
 111 }
 112
 113 static void
 114 sp_tweak_context_class_init(SPTweakContextClass *klass)
 115 {
 116     GObjectClass *object_class = (GObjectClass *) klass;
 117     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 118
 119     parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 120
 121     object_class->dispose = sp_tweak_context_dispose;
 122
 123     event_context_class->setup = sp_tweak_context_setup;
 124     event_context_class->set = sp_tweak_context_set;
 125     event_context_class->root_handler = sp_tweak_context_root_handler;
 126 }
 127
 128 static void
 129 sp_tweak_context_init(SPTweakContext *tc)
 130 {
 131     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 132
 133     event_context->cursor_shape = cursor_push_xpm;
 134     event_context->hot_x = 4;
 135     event_context->hot_y = 4;
 136
 137     /* attributes */
 138     tc->dragging = FALSE;
 139
 140     tc->width = 0.2;
 141     tc->force = 0.2;
 142     tc->pressure = TC_DEFAULT_PRESSURE;
 143
 144     tc->is_dilating = false;
 145     tc->has_dilated = false;
 146 }
 147
 148 static void
 149 sp_tweak_context_dispose(GObject *object)
 150 {
 151     SPTweakContext *tc = SP_TWEAK_CONTEXT(object);
 152
 153     if (tc->dilate_area) {
 154         gtk_object_destroy(GTK_OBJECT(tc->dilate_area));
 155         tc->dilate_area = NULL;
 156     }
 157
 158     if (tc->_message_context) {
 159         delete tc->_message_context;
 160     }
 161
 162     G_OBJECT_CLASS(parent_class)->dispose(object);
 163 }
 164
 165 void
 166 sp_tweak_update_cursor (SPTweakContext *tc, gint mode)
 167 {
 168     SPEventContext *event_context = SP_EVENT_CONTEXT(tc);
 169    switch (mode) {
 170        case TWEAK_MODE_PUSH:
 171            event_context->cursor_shape = cursor_push_xpm;
 172            break;
 173        case TWEAK_MODE_SUCK:
 174            event_context->cursor_shape = cursor_thin_xpm;
 175            break;
 176        case TWEAK_MODE_BLOW:
 177            event_context->cursor_shape = cursor_thicken_xpm;
 178            break;
 179        case TWEAK_MODE_ROUGHEN:
 180            event_context->cursor_shape = cursor_roughen_xpm;
 181            break;
 182    }
 183    sp_event_context_update_cursor(event_context);
 184 }
 185
 186 static void
 187 sp_tweak_context_setup(SPEventContext *ec)
 188 {
 189     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 190
 191     if (((SPEventContextClass *) parent_class)->setup)
 192         ((SPEventContextClass *) parent_class)->setup(ec);
 193
 194     {
 195         SPCurve *c = sp_curve_new_from_foreign_bpath(hatch_area_circle);
 196         tc->dilate_area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
 197         sp_curve_unref(c);
 198         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(tc->dilate_area), 0x00000000,(SPWindRule)0);
 199         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(tc->dilate_area), 0xff9900ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 200         sp_canvas_item_hide(tc->dilate_area);
 201     }
 202
 203     sp_event_context_read(ec, "width");
 204     sp_event_context_read(ec, "mode");
 205     sp_event_context_read(ec, "fidelity");
 206     sp_event_context_read(ec, "force");
 207     sp_event_context_read(ec, "usepressure");
 208
 209     tc->is_drawing = false;
 210
 211     tc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 212 }
 213
 214 static void
 215 sp_tweak_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 216 {
 217     SPTweakContext *tc = SP_TWEAK_CONTEXT(ec);
 218
 219     if (!strcmp(key, "width")) {
 220         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.1 );
 221         tc->width = CLAMP(dval, -1000.0, 1000.0);
 222     } else if (!strcmp(key, "mode")) {
 223         gint64 const dval = ( val ? g_ascii_strtoll (val, NULL, 10) : 0 );
 224         tc->mode = dval;
 225         sp_tweak_update_cursor(tc, tc->mode);
 226     } else if (!strcmp(key, "fidelity")) {
 227         double const dval = ( val ? g_ascii_strtod (val, NULL) : 0.0 );
 228         tc->fidelity = CLAMP(dval, 0.0, 1.0);
 229     } else if (!strcmp(key, "force")) {
 230         double const dval = ( val ? g_ascii_strtod (val, NULL) : 1.0 );
 231         tc->force = CLAMP(dval, 0, 1.0);
 232     } else if (!strcmp(key, "usepressure")) {
 233         tc->usepressure = (val && strcmp(val, "0"));
 234     }
 235 }
 236
 237 static void
 238 sp_tweak_extinput(SPTweakContext *tc, GdkEvent *event)
 239 {
 240     if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &tc->pressure))
 241         tc->pressure = CLAMP (tc->pressure, TC_MIN_PRESSURE, TC_MAX_PRESSURE);
 242     else
 243         tc->pressure = TC_DEFAULT_PRESSURE;
 244 }
 245
 246 double
 247 get_dilate_radius (SPTweakContext *tc)
 248 {
 249     // 10 times the pen width:
 250     return 500 * tc->width/SP_EVENT_CONTEXT(tc)->desktop->current_zoom();
 251 }
 252
 253 double
 254 get_dilate_force (SPTweakContext *tc)
 255 {
 256     double force = 8 * (tc->usepressure? tc->pressure : TC_DEFAULT_PRESSURE)
 257         /sqrt(SP_EVENT_CONTEXT(tc)->desktop->current_zoom());
 258     if (force > 3) {
 259         force += 4 * (force - 3);
 260     }
 261     return force * tc->force;
 262 }
 263
 264 bool
 265 sp_tweak_dilate_recursive (Inkscape::Selection *selection, SPItem *item, NR::Point p, NR::Point vector, gint mode, double radius, double force, double fidelity)
 266 {
 267     bool did = false;
 268
 269     if (SP_IS_GROUP(item)) {
 270         for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
 271             if (SP_IS_ITEM(child)) {
 272                 if (sp_tweak_dilate_recursive (selection, SP_ITEM(child), p, vector, mode, radius, force, fidelity))
 273                     did = true;
 274             }
 275         }
 276
 277     } else if (SP_IS_PATH(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 278
 279         Inkscape::XML::Node *newrepr = NULL;
 280         gint pos = 0;
 281         Inkscape::XML::Node *parent = NULL;
 282         char const *id = NULL;
 283         if (!SP_IS_PATH(item)) {
 284             newrepr = sp_selected_item_to_curved_repr(item, 0);
 285             if (!newrepr)
 286                 return false;
 287
 288             // remember the position of the item
 289             pos = SP_OBJECT_REPR(item)->position();
 290             // remember parent
 291             parent = SP_OBJECT_REPR(item)->parent();
 292             // remember id
 293             id = SP_OBJECT_REPR(item)->attribute("id");
 294         }
 295
 296
 297         // skip those paths whose bboxes are entirely out of reach with our radius
 298         NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2doc_affine(item));
 299         if (bbox) {
 300             bbox->growBy(radius);
 301             if (!bbox->contains(p)) {
 302                 return false;
 303             }
 304         }
 305
 306         Path *orig = Path_for_item(item, false);
 307         if (orig == NULL) {
 308             return false;
 309         }
 310         Path *res = new Path;
 311         res->SetBackData(false);
 312
 313         Shape *theShape = new Shape;
 314         Shape *theRes = new Shape;
 315
 316         orig->ConvertWithBackData(0.08 - (0.07 * fidelity)); // default 0.059
 317         orig->Fill(theShape, 0);
 318
 319         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
 320         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 321         if (val && strcmp(val, "nonzero") == 0)
 322         {
 323             theRes->ConvertToShape(theShape, fill_nonZero);
 324         }
 325         else if (val && strcmp(val, "evenodd") == 0)
 326         {
 327             theRes->ConvertToShape(theShape, fill_oddEven);
 328         }
 329         else
 330         {
 331             theRes->ConvertToShape(theShape, fill_nonZero);
 332         }
 333
 334         if (NR::L2(vector) != 0)
 335             vector = 1/NR::L2(vector) * vector;
 336
 337         bool did_this = false;
 338         NR::Matrix i2doc(sp_item_i2doc_affine(item));
 339         if (mode == TWEAK_MODE_SUCK || mode == TWEAK_MODE_BLOW) {
 340             if (theShape->MakeOffset(theRes,
 341                                  mode == TWEAK_MODE_BLOW? force : -force,
 342                                  join_straight, 4.0,
 343                                  true, p[NR::X], p[NR::Y], radius, &i2doc) == 0) // 0 means the shape was actually changed
 344               did_this = true;
 345         } else if (mode == TWEAK_MODE_PUSH) {
 346             if (theShape->MakePush(theRes,
 347                                  join_straight, 4.0,
 348                                  true, p, force*2*vector, radius, &i2doc) == 0)
 349               did_this = true;
 350         } else if (mode == TWEAK_MODE_ROUGHEN) {
 351             if (theShape->MakeJitter(theRes,
 352                                  join_straight, 4.0,
 353                                  true, p, force, radius, &i2doc) == 0)
 354               did_this = true;
 355         }
 356
 357         // the rest only makes sense if we actually changed the path
 358         if (did_this) {
 359             theRes->ConvertToShape(theShape, fill_positive);
 360
 361             res->Reset();
 362             theRes->ConvertToForme(res);
 363
 364             double th_max = 0.6 - 0.59*sqrt(fidelity);
 365             double threshold = MAX(th_max, th_max*force);
 366             res->ConvertEvenLines(threshold);
 367             res->Simplify(threshold);
 368
 369             if (newrepr) { // converting to path, need to replace the repr
 370                 bool is_selected = selection->includes(item);
 371                 selection->remove(item);
 372
 373                 // It's going to resurrect, so we delete without notifying listeners.
 374                 SP_OBJECT(item)->deleteObject(false);
 375
 376                 // restore id
 377                 newrepr->setAttribute("id", id);
 378                 // add the new repr to the parent
 379                 parent->appendChild(newrepr);
 380                 // move to the saved position
 381                 newrepr->setPosition(pos > 0 ? pos : 0);
 382
 383                 if (is_selected)
 384                     selection->add(newrepr);
 385             }
 386
 387             if (res->descr_cmd.size() > 1) {
 388                 gchar *str = res->svg_dump_path();
 389                 if (newrepr)
 390                     newrepr->setAttribute("d", str);
 391                 else
 392                     SP_OBJECT_REPR(item)->setAttribute("d", str);
 393                 g_free(str);
 394             } else {
 395                 // TODO: if there's 0 or 1 node left, delete this path altogether
 396             }
 397
 398             if (newrepr) {
 399                 Inkscape::GC::release(newrepr);
 400                 newrepr = NULL;
 401             }
 402         }
 403
 404         delete theShape;
 405         delete theRes;
 406         delete orig;
 407         delete res;
 408
 409         if (did_this)
 410             did = true;
 411     }
 412
 413     return did;
 414 }
 415
 416
 417 bool
 418 sp_tweak_dilate (SPTweakContext *tc, NR::Point p, NR::Point vector)
 419 {
 420     Inkscape::Selection *selection = sp_desktop_selection(SP_EVENT_CONTEXT(tc)->desktop);
 421
 422     if (selection->isEmpty()) {
 423         return false;
 424     }
 425
 426     bool did = false;
 427     double radius = get_dilate_radius(tc);
 428     double force = get_dilate_force(tc);
 429     if (radius == 0 || force == 0) {
 430         return false;
 431     }
 432
 433     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 434          items != NULL;
 435          items = items->next) {
 436
 437         SPItem *item = (SPItem *) items->data;
 438
 439         if (sp_tweak_dilate_recursive (selection, item, p, vector, tc->mode, radius, force, tc->fidelity))
 440             did = true;
 441
 442     }
 443
 444     return did;
 445 }
 446
 447 void
 448 sp_tweak_update_area (SPTweakContext *tc)
 449 {
 450         double radius = get_dilate_radius(tc);
 451         NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(SP_EVENT_CONTEXT(tc)->desktop->point()));
 452         sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 453         sp_canvas_item_show(tc->dilate_area);
 454 }
 455
 456 void
 457 sp_tweak_switch_mode (SPTweakContext *tc, gint mode)
 458 {
 459     SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 460     // need to set explicitly, because the prefs may not have changed by the previous
 461     tc->mode = mode;
 462     sp_tweak_update_cursor (tc, mode);
 463 }
 464
 465 void
 466 sp_tweak_switch_mode_temporarily (SPTweakContext *tc, gint mode)
 467 {
 468    // Juggling about so that prefs have the old value but tc->mode and the button show new mode:
 469    gint now_mode = prefs_get_int_attribute("tools.tweak", "mode", 0);
 470    SP_EVENT_CONTEXT(tc)->desktop->setToolboxSelectOneValue ("tweak_tool_mode", mode);
 471    sp_tweak_update_cursor (tc, mode);
 472    // button has changed prefs, restore
 473    prefs_set_int_attribute("tools.tweak", "mode", now_mode);
 474    // changing prefs changed tc->mode, restore back :)
 475    tc->mode = mode;
 476 }
 477
 478 gint
 479 sp_tweak_context_root_handler(SPEventContext *event_context,
 480                                   GdkEvent *event)
 481 {
 482     SPTweakContext *tc = SP_TWEAK_CONTEXT(event_context);
 483     SPDesktop *desktop = event_context->desktop;
 484
 485     gint ret = FALSE;
 486
 487     switch (event->type) {
 488         case GDK_BUTTON_PRESS:
 489             if (event->button.button == 1 && !event_context->space_panning) {
 490
 491                 if (Inkscape::have_viable_layer(desktop, tc->_message_context) == false) {
 492                     return TRUE;
 493                 }
 494
 495                 NR::Point const button_w(event->button.x,
 496                                          event->button.y);
 497                 NR::Point const button_dt(desktop->w2d(button_w));
 498                 tc->last_push = desktop->dt2doc(button_dt);
 499
 500                 sp_tweak_extinput(tc, event);
 501
 502                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 503                 tc->is_drawing = true;
 504                 tc->is_dilating = true;
 505                 tc->has_dilated = false;
 506
 507                 ret = TRUE;
 508             }
 509             break;
 510         case GDK_MOTION_NOTIFY:
 511         {
 512             NR::Point const motion_w(event->motion.x,
 513                                      event->motion.y);
 514             NR::Point motion_dt(desktop->w2d(motion_w));
 515             NR::Point motion_doc(desktop->dt2doc(motion_dt));
 516             sp_tweak_extinput(tc, event);
 517
 518             // draw the dilating cursor
 519                 double radius = get_dilate_radius(tc);
 520                 NR::Matrix const sm (NR::scale(radius, radius) * NR::translate(desktop->w2d(motion_w)));
 521                 sp_canvas_item_affine_absolute(tc->dilate_area, sm);
 522                 sp_canvas_item_show(tc->dilate_area);
 523
 524                 guint num = 0;
 525                 if (!desktop->selection->isEmpty()) {
 526                     num = g_slist_length((GSList *) desktop->selection->itemList());
 527                 }
 528                 if (num == 0) {
 529                     tc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Select paths</b> to tweak"));
 530                 } else {
 531                     switch (tc->mode) {
 532                         case TWEAK_MODE_PUSH:
 533                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 534                                                       _("<b>Pushing %d</b> selected path(s)"), num);
 535                            break;
 536                         case TWEAK_MODE_SUCK:
 537                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 538                                                       _("<b>Melting %d</b> selected path(s)"), num);
 539                            break;
 540                         case TWEAK_MODE_BLOW:
 541                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 542                                                       _("<b>Blowing %d</b> selected path(s)"), num);
 543                            break;
 544                         case TWEAK_MODE_ROUGHEN:
 545                            tc->_message_context->setF(Inkscape::NORMAL_MESSAGE,
 546                                                       _("<b>Roughening %d</b> selected path(s)"), num);
 547                            break;
 548                     }
 549                 }
 550
 551
 552             // dilating:
 553             if (tc->is_drawing && ( event->motion.state & GDK_BUTTON1_MASK )) {
 554                 sp_tweak_dilate (tc, motion_doc, motion_doc - tc->last_push);
 555                 //tc->last_push = motion_doc;
 556                 tc->has_dilated = true;
 557                 // it's slow, so prevent clogging up with events
 558                 gobble_motion_events(GDK_BUTTON1_MASK);
 559                 return TRUE;
 560             }
 561
 562         }
 563         break;
 564
 565
 566     case GDK_BUTTON_RELEASE:
 567     {
 568         NR::Point const motion_w(event->button.x, event->button.y);
 569         NR::Point const motion_dt(desktop->w2d(motion_w));
 570
 571         sp_canvas_end_forced_full_redraws(desktop->canvas);
 572         tc->is_drawing = false;
 573
 574         if (tc->is_dilating && event->button.button == 1 && !event_context->space_panning) {
 575             if (!tc->has_dilated) {
 576                 // if we did not rub, do a light tap
 577                 tc->pressure = 0.03;
 578                 sp_tweak_dilate (tc, desktop->dt2doc(motion_dt), NR::Point(0,0));
 579             }
 580             tc->is_dilating = false;
 581             tc->has_dilated = false;
 582             sp_document_done(sp_desktop_document(SP_EVENT_CONTEXT(tc)->desktop),
 583                          SP_VERB_CONTEXT_TWEAK,
 584                              (tc->mode==TWEAK_MODE_BLOW ? _("Blow tweak") : (tc->mode==TWEAK_MODE_SUCK ? _("Melt tweak") : (tc->mode==TWEAK_MODE_PUSH ? _("Push tweak") : _("Roughen tweak")))));
 585             ret = TRUE;
 586
 587         }
 588         break;
 589     }
 590
 591     case GDK_KEY_PRESS:
 592         switch (get_group0_keyval (&event->key)) {
 593         case GDK_p:
 594         case GDK_P:
 595         case GDK_1:
 596             if (MOD__SHIFT_ONLY) {
 597                 sp_tweak_switch_mode(tc, TWEAK_MODE_PUSH);
 598                 ret = TRUE;
 599             }
 600             break;
 601         case GDK_m:
 602         case GDK_M:
 603         case GDK_2:
 604             if (MOD__SHIFT_ONLY) {
 605                 sp_tweak_switch_mode(tc, TWEAK_MODE_SUCK);
 606                 ret = TRUE;
 607             }
 608             break;
 609         case GDK_b:
 610         case GDK_B:
 611         case GDK_3:
 612             if (MOD__SHIFT_ONLY) {
 613                 sp_tweak_switch_mode(tc, TWEAK_MODE_BLOW);
 614                 ret = TRUE;
 615             }
 616             break;
 617         case GDK_r:
 618         case GDK_R:
 619         case GDK_4:
 620             if (MOD__SHIFT_ONLY) {
 621                 sp_tweak_switch_mode(tc, TWEAK_MODE_ROUGHEN);
 622                 ret = TRUE;
 623             }
 624             break;
 625
 626         case GDK_Up:
 627         case GDK_KP_Up:
 628             if (!MOD__CTRL_ONLY) {
 629                 tc->force += 0.05;
 630                 if (tc->force > 1.0)
 631                     tc->force = 1.0;
 632                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
 633                 ret = TRUE;
 634             }
 635             break;
 636         case GDK_Down:
 637         case GDK_KP_Down:
 638             if (!MOD__CTRL_ONLY) {
 639                 tc->force -= 0.05;
 640                 if (tc->force < 0.0)
 641                     tc->force = 0.0;
 642                 desktop->setToolboxAdjustmentValue ("tweak-force", tc->force * 100);
 643                 ret = TRUE;
 644             }
 645             break;
 646         case GDK_Right:
 647         case GDK_KP_Right:
 648             if (!MOD__CTRL_ONLY) {
 649                 tc->width += 0.01;
 650                 if (tc->width > 1.0)
 651                     tc->width = 1.0;
 652                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100); // the same spinbutton is for alt+x
 653                 sp_tweak_update_area(tc);
 654                 ret = TRUE;
 655             }
 656             break;
 657         case GDK_Left:
 658         case GDK_KP_Left:
 659             if (!MOD__CTRL_ONLY) {
 660                 tc->width -= 0.01;
 661                 if (tc->width < 0.01)
 662                     tc->width = 0.01;
 663                 desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
 664                 sp_tweak_update_area(tc);
 665                 ret = TRUE;
 666             }
 667             break;
 668         case GDK_Home:
 669         case GDK_KP_Home:
 670             tc->width = 0.01;
 671             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
 672             sp_tweak_update_area(tc);
 673             ret = TRUE;
 674             break;
 675         case GDK_End:
 676         case GDK_KP_End:
 677             tc->width = 1.0;
 678             desktop->setToolboxAdjustmentValue ("altx-tweak", tc->width * 100);
 679             sp_tweak_update_area(tc);
 680             ret = TRUE;
 681             break;
 682         case GDK_x:
 683         case GDK_X:
 684             if (MOD__ALT_ONLY) {
 685                 desktop->setToolboxFocusTo ("altx-tweak");
 686                 ret = TRUE;
 687             }
 688             break;
 689
 690         case GDK_Control_L:
 691         case GDK_Control_R:
 692             if (MOD__SHIFT) {
 693                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_BLOW);
 694             } else {
 695                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SUCK);
 696             }
 697             break;
 698         case GDK_Shift_L:
 699         case GDK_Shift_R:
 700             if (MOD__CTRL) {
 701                 sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_BLOW);
 702             }
 703             break;
 704         default:
 705             break;
 706         }
 707         break;
 708
 709     case GDK_KEY_RELEASE:
 710         switch (get_group0_keyval(&event->key)) {
 711             case GDK_Control_L:
 712             case GDK_Control_R:
 713                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
 714                 tc->_message_context->clear();
 715                 break;
 716             case GDK_Shift_L:
 717             case GDK_Shift_R:
 718                 if (MOD__CTRL) {
 719                     sp_tweak_switch_mode_temporarily(tc, TWEAK_MODE_SUCK);
 720                 }
 721                 break;
 722             break;
 723             default:
 724                 sp_tweak_switch_mode (tc, prefs_get_int_attribute("tools.tweak", "mode", 0));
 725                 break;
 726         }
 727
 728     default:
 729         break;
 730     }
 731
 732     if (!ret) {
 733         if (((SPEventContextClass *) parent_class)->root_handler) {
 734             ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
 735         }
 736     }
 737
 738     return ret;
 739 }
 740
 741
 742 /*
 743   Local Variables:
 744   mode:c++
 745   c-file-style:"stroustrup"
 746   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 747   indent-tabs-mode:nil
 748   fill-column:99
 749   End:
 750 */
 751 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :