src/pen-context.cpp

   1 /** \file
   2  * Pen event context implementation.
   3  */
   4
   5 /*
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2000 Lauris Kaplinski
  11  * Copyright (C) 2000-2001 Ximian, Inc.
  12  * Copyright (C) 2002 Lauris Kaplinski
  13  * Copyright (C) 2004 Monash University
  14  *
  15  * Released under GNU GPL, read the file 'COPYING' for more information
  16  */
  17
  18 #include <gdk/gdkkeysyms.h>
  19
  20 #include "pen-context.h"
  21 #include "sp-namedview.h"
  22 #include "sp-metrics.h"
  23 #include "desktop.h"
  24 #include "desktop-handles.h"
  25 #include "selection.h"
  26 #include "draw-anchor.h"
  27 #include "message-stack.h"
  28 #include "message-context.h"
  29 #include "prefs-utils.h"
  30 #include "sp-path.h"
  31
  32 #include "pixmaps/cursor-pen.xpm"
  33 #include "display/canvas-bpath.h"
  34 #include "display/sp-ctrlline.h"
  35 #include "display/sodipodi-ctrl.h"
  36 #include <glibmm/i18n.h>
  37 #include "libnr/n-art-bpath.h"
  38 #include "helper/units.h"
  39 #include "macros.h"
  40 #include "context-fns.h"
  41
  42
  43 static void sp_pen_context_class_init(SPPenContextClass *klass);
  44 static void sp_pen_context_init(SPPenContext *pc);
  45 static void sp_pen_context_dispose(GObject *object);
  46
  47 static void sp_pen_context_setup(SPEventContext *ec);
  48 static void sp_pen_context_finish(SPEventContext *ec);
  49 static void sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  50 static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event);
  51 static gint sp_pen_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  52
  53 static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
  54 static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
  55 static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
  56 static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
  57
  58 static void spdc_pen_finish(SPPenContext *pc, gboolean closed);
  59
  60 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent);
  61 static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent);
  62 static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent);
  63 static gint pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent);
  64 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
  65 static void spdc_reset_colors(SPPenContext *pc);
  66
  67 static void pen_disable_events(SPPenContext *const pc);
  68 static void pen_enable_events(SPPenContext *const pc);
  69
  70 static NR::Point pen_drag_origin_w(0, 0);
  71 static bool pen_within_tolerance = false;
  72
  73 static SPDrawContextClass *pen_parent_class;
  74
  75 /**
  76  * Register SPPenContext with Gdk and return its type.
  77  */
  78 GType
  79 sp_pen_context_get_type(void)
  80 {
  81     static GType type = 0;
  82     if (!type) {
  83         GTypeInfo info = {
  84             sizeof(SPPenContextClass),
  85             NULL, NULL,
  86             (GClassInitFunc) sp_pen_context_class_init,
  87             NULL, NULL,
  88             sizeof(SPPenContext),
  89             4,
  90             (GInstanceInitFunc) sp_pen_context_init,
  91             NULL,   /* value_table */
  92         };
  93         type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0);
  94     }
  95     return type;
  96 }
  97
  98 /**
  99  * Initialize the SPPenContext vtable.
 100  */
 101 static void
 102 sp_pen_context_class_init(SPPenContextClass *klass)
 103 {
 104     GObjectClass *object_class;
 105     SPEventContextClass *event_context_class;
 106
 107     object_class = (GObjectClass *) klass;
 108     event_context_class = (SPEventContextClass *) klass;
 109
 110     pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(klass);
 111
 112     object_class->dispose = sp_pen_context_dispose;
 113
 114     event_context_class->setup = sp_pen_context_setup;
 115     event_context_class->finish = sp_pen_context_finish;
 116     event_context_class->set = sp_pen_context_set;
 117     event_context_class->root_handler = sp_pen_context_root_handler;
 118     event_context_class->item_handler = sp_pen_context_item_handler;
 119 }
 120
 121 /**
 122  * Callback to initialize SPPenContext object.
 123  */
 124 static void
 125 sp_pen_context_init(SPPenContext *pc)
 126 {
 127
 128     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 129
 130     event_context->cursor_shape = cursor_pen_xpm;
 131     event_context->hot_x = 4;
 132     event_context->hot_y = 4;
 133
 134     pc->npoints = 0;
 135     pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 136     pc->state = SP_PEN_CONTEXT_POINT;
 137
 138     pc->c0 = NULL;
 139     pc->c1 = NULL;
 140     pc->cl0 = NULL;
 141     pc->cl1 = NULL;
 142
 143     pc->events_disabled = 0;
 144 }
 145
 146 /**
 147  * Callback to destroy the SPPenContext object's members and itself.
 148  */
 149 static void
 150 sp_pen_context_dispose(GObject *object)
 151 {
 152     SPPenContext *pc;
 153
 154     pc = SP_PEN_CONTEXT(object);
 155
 156     if (pc->c0) {
 157         gtk_object_destroy(GTK_OBJECT(pc->c0));
 158         pc->c0 = NULL;
 159     }
 160     if (pc->c1) {
 161         gtk_object_destroy(GTK_OBJECT(pc->c1));
 162         pc->c1 = NULL;
 163     }
 164     if (pc->cl0) {
 165         gtk_object_destroy(GTK_OBJECT(pc->cl0));
 166         pc->cl0 = NULL;
 167     }
 168     if (pc->cl1) {
 169         gtk_object_destroy(GTK_OBJECT(pc->cl1));
 170         pc->cl1 = NULL;
 171     }
 172
 173     G_OBJECT_CLASS(pen_parent_class)->dispose(object);
 174 }
 175
 176 /**
 177  * Callback to initialize SPPenContext object.
 178  */
 179 static void
 180 sp_pen_context_setup(SPEventContext *ec)
 181 {
 182     SPPenContext *pc;
 183
 184     pc = SP_PEN_CONTEXT(ec);
 185
 186     if (((SPEventContextClass *) pen_parent_class)->setup) {
 187         ((SPEventContextClass *) pen_parent_class)->setup(ec);
 188     }
 189
 190     /* Pen indicators */
 191     pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 192                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 193     pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 194                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 195     pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 196     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
 197     pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 198     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
 199
 200     sp_canvas_item_hide(pc->c0);
 201     sp_canvas_item_hide(pc->c1);
 202     sp_canvas_item_hide(pc->cl0);
 203     sp_canvas_item_hide(pc->cl1);
 204
 205     sp_event_context_read(ec, "mode");
 206
 207     pc->anchor_statusbar = false;
 208
 209     if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
 210         ec->enableSelectionCue();
 211     }
 212 }
 213
 214 static void
 215 pen_cancel (SPPenContext *const pc)
 216 {
 217     pc->state = SP_PEN_CONTEXT_STOP;
 218     spdc_reset_colors(pc);
 219     sp_canvas_item_hide(pc->c0);
 220     sp_canvas_item_hide(pc->c1);
 221     sp_canvas_item_hide(pc->cl0);
 222     sp_canvas_item_hide(pc->cl1);
 223     pc->_message_context->clear();
 224     pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
 225
 226     sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
 227 }
 228
 229 /**
 230  * Finalization callback.
 231  */
 232 static void
 233 sp_pen_context_finish(SPEventContext *ec)
 234 {
 235     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 236
 237     if (pc->npoints != 0) {
 238         pen_cancel (pc);
 239     }
 240
 241     if (((SPEventContextClass *) pen_parent_class)->finish) {
 242         ((SPEventContextClass *) pen_parent_class)->finish(ec);
 243     }
 244 }
 245
 246 /**
 247  * Callback that sets key to value in pen context.
 248  */
 249 static void
 250 sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 251 {
 252     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 253
 254     if (!strcmp(key, "mode")) {
 255         if ( val && !strcmp(val, "drag") ) {
 256             pc->mode = SP_PEN_CONTEXT_MODE_DRAG;
 257         } else {
 258             pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 259         }
 260     }
 261 }
 262
 263 /**
 264  * Snaps new node relative to the previous node.
 265  */
 266 static void
 267 spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
 268 {
 269     if (pc->npoints > 0) {
 270         spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
 271     }
 272
 273     spdc_endpoint_snap_free(pc, p, state);
 274 }
 275
 276 /**
 277  * Snaps new node's handle relative to the new node.
 278  */
 279 static void
 280 spdc_endpoint_snap_handle(SPPenContext const *const pc, NR::Point &p, guint const state)
 281 {
 282     g_return_if_fail(( pc->npoints == 2 ||
 283                        pc->npoints == 5   ));
 284
 285     spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
 286     spdc_endpoint_snap_free(pc, p, state);
 287 }
 288
 289 static gint
 290 sp_pen_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
 291 {
 292     SPPenContext *const pc = SP_PEN_CONTEXT(ec);
 293
 294     gint ret = FALSE;
 295
 296     switch (event->type) {
 297         case GDK_BUTTON_PRESS:
 298             ret = pen_handle_button_press(pc, event->button);
 299             break;
 300         default:
 301             break;
 302     }
 303
 304     if (!ret) {
 305         if (((SPEventContextClass *) pen_parent_class)->item_handler)
 306             ret = ((SPEventContextClass *) pen_parent_class)->item_handler(ec, item, event);
 307     }
 308
 309     return ret;
 310 }
 311
 312 /**
 313  * Callback to handle all pen events.
 314  */
 315 static gint
 316 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
 317 {
 318     SPPenContext *const pc = SP_PEN_CONTEXT(ec);
 319
 320     gint ret = FALSE;
 321
 322     switch (event->type) {
 323         case GDK_BUTTON_PRESS:
 324             ret = pen_handle_button_press(pc, event->button);
 325             break;
 326
 327         case GDK_MOTION_NOTIFY:
 328             ret = pen_handle_motion_notify(pc, event->motion);
 329             break;
 330
 331         case GDK_BUTTON_RELEASE:
 332             ret = pen_handle_button_release(pc, event->button);
 333             break;
 334
 335         case GDK_2BUTTON_PRESS:
 336             ret = pen_handle_2button_press(pc, event->button);
 337             break;
 338
 339         case GDK_KEY_PRESS:
 340             ret = pen_handle_key_press(pc, event);
 341             break;
 342
 343         default:
 344             break;
 345     }
 346
 347     if (!ret) {
 348         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 349             = ((SPEventContextClass *) pen_parent_class)->root_handler;
 350         if (parent_root_handler) {
 351             ret = parent_root_handler(ec, event);
 352         }
 353     }
 354
 355     return ret;
 356 }
 357
 358 /**
 359  * Handle mouse button press event.
 360  */
 361 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 362 {
 363     if (pc->events_disabled) {
 364         // skip event processing if events are disabled
 365         return FALSE;
 366     }
 367
 368     SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
 369     SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 370     NR::Point const event_w(bevent.x, bevent.y);
 371     NR::Point const event_dt(desktop->w2d(event_w));
 372     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 373
 374     gint ret = FALSE;
 375     if (bevent.button == 1 && !event_context->space_panning) {
 376
 377         if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
 378             return TRUE;
 379         }
 380
 381         pen_drag_origin_w = event_w;
 382         pen_within_tolerance = true;
 383
 384         /* Test whether we hit any anchor. */
 385         SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
 386
 387         switch (pc->mode) {
 388             case SP_PEN_CONTEXT_MODE_CLICK:
 389                 /* In click mode we add point on release */
 390                 switch (pc->state) {
 391                     case SP_PEN_CONTEXT_POINT:
 392                     case SP_PEN_CONTEXT_CONTROL:
 393                     case SP_PEN_CONTEXT_CLOSE:
 394                         break;
 395                     case SP_PEN_CONTEXT_STOP:
 396                         /* This is allowed, if we just cancelled curve */
 397                         pc->state = SP_PEN_CONTEXT_POINT;
 398                         break;
 399                     default:
 400                         break;
 401                 }
 402                 break;
 403             case SP_PEN_CONTEXT_MODE_DRAG:
 404                 switch (pc->state) {
 405                     case SP_PEN_CONTEXT_STOP:
 406                         /* This is allowed, if we just cancelled curve */
 407                     case SP_PEN_CONTEXT_POINT:
 408                         if (pc->npoints == 0) {
 409
 410                             /* Set start anchor */
 411                             pc->sa = anchor;
 412                             NR::Point p;
 413                             if (anchor) {
 414
 415                                 /* Adjust point to anchor if needed */
 416                                 p = anchor->dp;
 417                                 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
 418
 419                             } else {
 420
 421                                 // This is the first click of a new curve; deselect item so that
 422                                 // this curve is not combined with it (unless it is drawn from its
 423                                 // anchor, which is handled by the sibling branch above)
 424                                 Inkscape::Selection * const selection = sp_desktop_selection(desktop);
 425                                 if (!(bevent.state & GDK_SHIFT_MASK)) {
 426
 427                                     selection->clear();
 428                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
 429
 430                                 } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
 431
 432                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
 433                                 }
 434
 435                                 /* Create green anchor */
 436                                 p = event_dt;
 437                                 spdc_endpoint_snap(pc, p, bevent.state);
 438                                 pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
 439                             }
 440                             spdc_pen_set_initial_point(pc, p);
 441                         } else {
 442
 443                             /* Set end anchor */
 444                             pc->ea = anchor;
 445                             NR::Point p;
 446                             if (anchor) {
 447
 448                                 p = anchor->dp;
 449                                 // we hit an anchor, will finish the curve (either with or without closing)
 450                                 // in release handler
 451                                 pc->state = SP_PEN_CONTEXT_CLOSE;
 452
 453                                 if (pc->green_anchor && pc->green_anchor->active) {
 454                                     // we clicked on the current curve start, so close it even if
 455                                     // we drag a handle away from it
 456                                     dc->green_closed = TRUE;
 457                                 }
 458                                 ret = TRUE;
 459                                 break;
 460
 461                             } else {
 462
 463                                 p = event_dt;
 464                                 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
 465                                 spdc_pen_set_subsequent_point(pc, p, true);
 466                             }
 467
 468                         }
 469                         pc->state = SP_PEN_CONTEXT_CONTROL;
 470                         ret = TRUE;
 471                         break;
 472                     case SP_PEN_CONTEXT_CONTROL:
 473                         g_warning("Button down in CONTROL state");
 474                         break;
 475                     case SP_PEN_CONTEXT_CLOSE:
 476                         g_warning("Button down in CLOSE state");
 477                         break;
 478                     default:
 479                         break;
 480                 }
 481                 break;
 482             default:
 483                 break;
 484         }
 485     } else if (bevent.button == 3) {
 486         if (pc->npoints != 0) {
 487
 488             spdc_pen_finish_segment(pc, event_dt, bevent.state);
 489             if (pc->green_closed) {
 490                 // finishing at the start anchor, close curve
 491                 spdc_pen_finish(pc, TRUE);
 492             } else {
 493                 // finishing at some other anchor, finish curve but not close
 494                 spdc_pen_finish(pc, FALSE);
 495             }
 496
 497             ret = TRUE;
 498         }
 499     }
 500
 501     return ret;
 502 }
 503
 504 /**
 505  * Handle motion_notify event.
 506  */
 507 static gint
 508 pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
 509 {
 510     gint ret = FALSE;
 511
 512     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 513
 514     if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 515         // allow scrolling
 516         return FALSE;
 517     }
 518
 519     if (pc->events_disabled) {
 520         // skip motion events if pen events are disabled
 521         return FALSE;
 522     }
 523
 524     NR::Point const event_w(mevent.x,
 525                             mevent.y);
 526     if (pen_within_tolerance) {
 527         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 528                                                                "value", 0, 0, 100);
 529         if ( NR::LInfty( event_w - pen_drag_origin_w ) < tolerance ) {
 530             return FALSE;   // Do not drag if we're within tolerance from origin.
 531         }
 532     }
 533     // Once the user has moved farther than tolerance from the original location
 534     // (indicating they intend to move the object, not click), then always process the
 535     // motion notify coordinates as given (no snapping back to origin)
 536     pen_within_tolerance = false;
 537
 538     SPDesktop *const dt = pc->desktop;
 539     if ( ( mevent.state & GDK_BUTTON1_MASK ) && !pc->grab ) {
 540         /* Grab mouse, so release will not pass unnoticed */
 541         pc->grab = SP_CANVAS_ITEM(dt->acetate);
 542         sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
 543                                         GDK_BUTTON_RELEASE_MASK |
 544                                         GDK_POINTER_MOTION_MASK  ),
 545                             NULL, mevent.time);
 546     }
 547
 548     /* Find desktop coordinates */
 549     NR::Point p = dt->w2d(event_w);
 550
 551     /* Test, whether we hit any anchor */
 552     SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 553
 554     switch (pc->mode) {
 555         case SP_PEN_CONTEXT_MODE_CLICK:
 556             switch (pc->state) {
 557                 case SP_PEN_CONTEXT_POINT:
 558                     if ( pc->npoints != 0 ) {
 559                         /* Only set point, if we are already appending */
 560                         spdc_endpoint_snap(pc, p, mevent.state);
 561                         spdc_pen_set_subsequent_point(pc, p, true);
 562                         ret = TRUE;
 563                     }
 564                     break;
 565                 case SP_PEN_CONTEXT_CONTROL:
 566                 case SP_PEN_CONTEXT_CLOSE:
 567                     /* Placing controls is last operation in CLOSE state */
 568                     spdc_endpoint_snap(pc, p, mevent.state);
 569                     spdc_pen_set_ctrl(pc, p, mevent.state);
 570                     ret = TRUE;
 571                     break;
 572                 case SP_PEN_CONTEXT_STOP:
 573                     /* This is perfectly valid */
 574                     break;
 575                 default:
 576                     break;
 577             }
 578             break;
 579         case SP_PEN_CONTEXT_MODE_DRAG:
 580             switch (pc->state) {
 581                 case SP_PEN_CONTEXT_POINT:
 582                     if ( pc->npoints > 0 ) {
 583                         /* Only set point, if we are already appending */
 584
 585                         if (!anchor) {   /* Snap node only if not hitting anchor */
 586                             spdc_endpoint_snap(pc, p, mevent.state);
 587                         }
 588
 589                         spdc_pen_set_subsequent_point(pc, p, !anchor);
 590
 591                         if (anchor && !pc->anchor_statusbar) {
 592                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
 593                             pc->anchor_statusbar = true;
 594                         } else if (!anchor && pc->anchor_statusbar) {
 595                             pc->_message_context->clear();
 596                             pc->anchor_statusbar = false;
 597                         }
 598
 599                         ret = TRUE;
 600                     } else {
 601                         if (anchor && !pc->anchor_statusbar) {
 602                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
 603                             pc->anchor_statusbar = true;
 604                         } else if (!anchor && pc->anchor_statusbar) {
 605                             pc->_message_context->clear();
 606                             pc->anchor_statusbar = false;
 607                         }
 608                     }
 609                     break;
 610                 case SP_PEN_CONTEXT_CONTROL:
 611                 case SP_PEN_CONTEXT_CLOSE:
 612                     /* Placing controls is last operation in CLOSE state */
 613
 614                     // snap the handle
 615                     spdc_endpoint_snap_handle(pc, p, mevent.state);
 616
 617                     spdc_pen_set_ctrl(pc, p, mevent.state);
 618                     ret = TRUE;
 619                     break;
 620                 case SP_PEN_CONTEXT_STOP:
 621                     /* This is perfectly valid */
 622                     break;
 623                 default:
 624                     break;
 625             }
 626             break;
 627         default:
 628             break;
 629     }
 630     return ret;
 631 }
 632
 633 /**
 634  * Handle mouse button release event.
 635  */
 636 static gint
 637 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
 638 {
 639     if (pc->events_disabled) {
 640         // skip event processing if events are disabled
 641         return FALSE;
 642     }
 643
 644     gint ret = FALSE;
 645     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 646     if ( revent.button == 1  && !event_context->space_panning) {
 647
 648         SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
 649
 650         NR::Point const event_w(revent.x,
 651                                 revent.y);
 652         /* Find desktop coordinates */
 653         NR::Point p = pc->desktop->w2d(event_w);
 654
 655         /* Test whether we hit any anchor. */
 656         SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 657
 658         switch (pc->mode) {
 659             case SP_PEN_CONTEXT_MODE_CLICK:
 660                 switch (pc->state) {
 661                     case SP_PEN_CONTEXT_POINT:
 662                         if ( pc->npoints == 0 ) {
 663                             /* Start new thread only with button release */
 664                             if (anchor) {
 665                                 p = anchor->dp;
 666                             }
 667                             pc->sa = anchor;
 668                             spdc_pen_set_initial_point(pc, p);
 669                         } else {
 670                             /* Set end anchor here */
 671                             pc->ea = anchor;
 672                             if (anchor) {
 673                                 p = anchor->dp;
 674                             }
 675                         }
 676                         pc->state = SP_PEN_CONTEXT_CONTROL;
 677                         ret = TRUE;
 678                         break;
 679                     case SP_PEN_CONTEXT_CONTROL:
 680                         /* End current segment */
 681                         spdc_endpoint_snap(pc, p, revent.state);
 682                         spdc_pen_finish_segment(pc, p, revent.state);
 683                         pc->state = SP_PEN_CONTEXT_POINT;
 684                         ret = TRUE;
 685                         break;
 686                     case SP_PEN_CONTEXT_CLOSE:
 687                         /* End current segment */
 688                         if (!anchor) {   /* Snap node only if not hitting anchor */
 689                             spdc_endpoint_snap(pc, p, revent.state);
 690                         }
 691                         spdc_pen_finish_segment(pc, p, revent.state);
 692                         spdc_pen_finish(pc, TRUE);
 693                         pc->state = SP_PEN_CONTEXT_POINT;
 694                         ret = TRUE;
 695                         break;
 696                     case SP_PEN_CONTEXT_STOP:
 697                         /* This is allowed, if we just cancelled curve */
 698                         pc->state = SP_PEN_CONTEXT_POINT;
 699                         ret = TRUE;
 700                         break;
 701                     default:
 702                         break;
 703                 }
 704                 break;
 705             case SP_PEN_CONTEXT_MODE_DRAG:
 706                 switch (pc->state) {
 707                     case SP_PEN_CONTEXT_POINT:
 708                     case SP_PEN_CONTEXT_CONTROL:
 709                         spdc_endpoint_snap(pc, p, revent.state);
 710                         spdc_pen_finish_segment(pc, p, revent.state);
 711                         break;
 712                     case SP_PEN_CONTEXT_CLOSE:
 713                         spdc_endpoint_snap(pc, p, revent.state);
 714                         spdc_pen_finish_segment(pc, p, revent.state);
 715                         if (pc->green_closed) {
 716                             // finishing at the start anchor, close curve
 717                             spdc_pen_finish(pc, TRUE);
 718                         } else {
 719                             // finishing at some other anchor, finish curve but not close
 720                             spdc_pen_finish(pc, FALSE);
 721                         }
 722                         break;
 723                     case SP_PEN_CONTEXT_STOP:
 724                         /* This is allowed, if we just cancelled curve */
 725                         break;
 726                     default:
 727                         break;
 728                 }
 729                 pc->state = SP_PEN_CONTEXT_POINT;
 730                 ret = TRUE;
 731                 break;
 732             default:
 733                 break;
 734         }
 735
 736         if (pc->grab) {
 737             /* Release grab now */
 738             sp_canvas_item_ungrab(pc->grab, revent.time);
 739             pc->grab = NULL;
 740         }
 741
 742         ret = TRUE;
 743
 744         dc->green_closed = FALSE;
 745     }
 746
 747     return ret;
 748 }
 749
 750 static gint
 751 pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 752 {
 753     gint ret = FALSE;
 754     if (pc->npoints != 0 && bevent.button != 2) {
 755         spdc_pen_finish(pc, FALSE);
 756         ret = TRUE;
 757     }
 758     return ret;
 759 }
 760
 761 void
 762 pen_redraw_all (SPPenContext *const pc)
 763 {
 764     // green
 765     if (pc->green_bpaths) {
 766         // remove old piecewise green canvasitems
 767         while (pc->green_bpaths) {
 768             gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
 769             pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
 770         }
 771         // one canvas bpath for all of green_curve
 772         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
 773         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 774         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
 775
 776         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
 777     }
 778
 779     if (pc->green_anchor)
 780         SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
 781
 782     sp_curve_reset(pc->red_curve);
 783     sp_curve_moveto(pc->red_curve, pc->p[0]);
 784     sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
 785     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
 786
 787     // handles
 788     if (pc->p[0] != pc->p[1]) {
 789         SP_CTRL(pc->c1)->moveto(pc->p[1]);
 790         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
 791         sp_canvas_item_show (pc->c1);
 792         sp_canvas_item_show (pc->cl1);
 793     } else {
 794         sp_canvas_item_hide (pc->c1);
 795         sp_canvas_item_hide (pc->cl1);
 796     }
 797
 798     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 799     if (bpath) {
 800         if (bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
 801             SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
 802             sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
 803             sp_canvas_item_show (pc->c0);
 804             sp_canvas_item_show (pc->cl0);
 805         } else {
 806             sp_canvas_item_hide (pc->c0);
 807             sp_canvas_item_hide (pc->cl0);
 808         }
 809     }
 810 }
 811
 812 void
 813 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
 814 {
 815     if (pc->npoints != 5)
 816         return;
 817
 818     // green
 819     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 820     if (bpath) {
 821         if (bpath->code == NR_CURVETO) {
 822             bpath->x2 += x;
 823             bpath->y2 += y;
 824         }
 825         bpath->x3 += x;
 826         bpath->y3 += y;
 827     } else {
 828         // start anchor too
 829         if (pc->green_anchor) {
 830             pc->green_anchor->dp += NR::Point(x, y);
 831         }
 832     }
 833
 834     // red
 835     pc->p[0] += NR::Point(x, y);
 836     pc->p[1] += NR::Point(x, y);
 837     pen_redraw_all(pc);
 838 }
 839
 840 void
 841 pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
 842 {
 843     pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
 844 }
 845
 846 void
 847 pen_lastpoint_tocurve (SPPenContext *const pc)
 848 {
 849     if (pc->npoints != 5)
 850         return;
 851
 852     // red
 853     NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
 854     if (bpath && bpath->code == NR_CURVETO) {
 855         pc->p[1] = pc->p[0] + (NR::Point(bpath->x3, bpath->y3) - NR::Point(bpath->x2, bpath->y2));
 856     } else {
 857         pc->p[1] = pc->p[0] + (pc->p[3] - pc->p[0])*(1/3);
 858     }
 859
 860     pen_redraw_all(pc);
 861 }
 862
 863 void
 864 pen_lastpoint_toline (SPPenContext *const pc)
 865 {
 866     if (pc->npoints != 5)
 867         return;
 868
 869     pc->p[1] = pc->p[0];
 870
 871     pen_redraw_all(pc);
 872 }
 873
 874
 875 static gint
 876 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
 877 {
 878     gint ret = FALSE;
 879     gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 880
 881     switch (get_group0_keyval (&event->key)) {
 882
 883         case GDK_Left: // move last point left
 884         case GDK_KP_Left:
 885         case GDK_KP_4:
 886             if (!MOD__CTRL) { // not ctrl
 887                 if (MOD__ALT) { // alt
 888                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift
 889                     else pen_lastpoint_move_screen(pc, -1, 0); // no shift
 890                 }
 891                 else { // no alt
 892                     if (MOD__SHIFT) pen_lastpoint_move(pc, -10*nudge, 0); // shift
 893                     else pen_lastpoint_move(pc, -nudge, 0); // no shift
 894                 }
 895                 ret = TRUE;
 896             }
 897             break;
 898         case GDK_Up: // move last point up
 899         case GDK_KP_Up:
 900         case GDK_KP_8:
 901             if (!MOD__CTRL) { // not ctrl
 902                 if (MOD__ALT) { // alt
 903                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift
 904                     else pen_lastpoint_move_screen(pc, 0, 1); // no shift
 905                 }
 906                 else { // no alt
 907                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, 10*nudge); // shift
 908                     else pen_lastpoint_move(pc, 0, nudge); // no shift
 909                 }
 910                 ret = TRUE;
 911             }
 912             break;
 913         case GDK_Right: // move last point right
 914         case GDK_KP_Right:
 915         case GDK_KP_6:
 916             if (!MOD__CTRL) { // not ctrl
 917                 if (MOD__ALT) { // alt
 918                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift
 919                     else pen_lastpoint_move_screen(pc, 1, 0); // no shift
 920                 }
 921                 else { // no alt
 922                     if (MOD__SHIFT) pen_lastpoint_move(pc, 10*nudge, 0); // shift
 923                     else pen_lastpoint_move(pc, nudge, 0); // no shift
 924                 }
 925                 ret = TRUE;
 926             }
 927             break;
 928         case GDK_Down: // move last point down
 929         case GDK_KP_Down:
 930         case GDK_KP_2:
 931             if (!MOD__CTRL) { // not ctrl
 932                 if (MOD__ALT) { // alt
 933                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift
 934                     else pen_lastpoint_move_screen(pc, 0, -1); // no shift
 935                 }
 936                 else { // no alt
 937                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, -10*nudge); // shift
 938                     else pen_lastpoint_move(pc, 0, -nudge); // no shift
 939                 }
 940                 ret = TRUE;
 941             }
 942             break;
 943
 944         case GDK_U:
 945         case GDK_u:
 946             if (MOD__SHIFT_ONLY) {
 947                 pen_lastpoint_tocurve(pc);
 948                 ret = TRUE;
 949             }
 950             break;
 951         case GDK_L:
 952         case GDK_l:
 953             if (MOD__SHIFT_ONLY) {
 954                 pen_lastpoint_toline(pc);
 955                 ret = TRUE;
 956             }
 957             break;
 958
 959         case GDK_Return:
 960         case GDK_KP_Enter:
 961             if (pc->npoints != 0) {
 962                 spdc_pen_finish(pc, FALSE);
 963                 ret = TRUE;
 964             }
 965             break;
 966         case GDK_Escape:
 967             if (pc->npoints != 0) {
 968                 // if drawing, cancel, otherwise pass it up for deselecting
 969                 pen_cancel (pc);
 970                 ret = TRUE;
 971             }
 972             break;
 973         case GDK_z:
 974         case GDK_Z:
 975             if (MOD__CTRL_ONLY && pc->npoints != 0) {
 976                 // if drawing, cancel, otherwise pass it up for undo
 977                 pen_cancel (pc);
 978                 ret = TRUE;
 979             }
 980             break;
 981         case GDK_BackSpace:
 982         case GDK_Delete:
 983         case GDK_KP_Delete:
 984             if (sp_curve_is_empty(pc->green_curve)) {
 985                 pen_cancel (pc);
 986                 ret = TRUE;
 987             } else {
 988                 /* Reset red curve */
 989                 sp_curve_reset(pc->red_curve);
 990                 /* Destroy topmost green bpath */
 991                 if (pc->green_bpaths) {
 992                     if (pc->green_bpaths->data)
 993                         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
 994                     pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
 995                 }
 996                 /* Get last segment */
 997                 NArtBpath const *const p = SP_CURVE_BPATH(pc->green_curve);
 998                 gint const e = SP_CURVE_LENGTH(pc->green_curve);
 999                 if ( e < 2 ) {
1000                     g_warning("Green curve length is %d", e);
1001                     break;
1002                 }
1003                 pc->p[0] = p[e - 2].c(3);
1004                 if (p[e - 1].code == NR_CURVETO) {
1005                     pc->p[1] = p[e - 1].c(1);
1006                 } else {
1007                     pc->p[1] = pc->p[0];
1008                 }
1009                 NR::Point const pt(( pc->npoints < 4
1010                                      ? p[e - 1].c(3)
1011                                      : pc->p[3] ));
1012                 pc->npoints = 2;
1013                 sp_curve_backspace(pc->green_curve);
1014                 sp_canvas_item_hide(pc->c0);
1015                 sp_canvas_item_hide(pc->c1);
1016                 sp_canvas_item_hide(pc->cl0);
1017                 sp_canvas_item_hide(pc->cl1);
1018                 pc->state = SP_PEN_CONTEXT_POINT;
1019                 spdc_pen_set_subsequent_point(pc, pt, true);
1020                 ret = TRUE;
1021             }
1022             break;
1023         default:
1024             break;
1025     }
1026     return ret;
1027 }
1028
1029 static void
1030 spdc_reset_colors(SPPenContext *pc)
1031 {
1032     /* Red */
1033     sp_curve_reset(pc->red_curve);
1034     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1035     /* Blue */
1036     sp_curve_reset(pc->blue_curve);
1037     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
1038     /* Green */
1039     while (pc->green_bpaths) {
1040         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1041         pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1042     }
1043     sp_curve_reset(pc->green_curve);
1044     if (pc->green_anchor) {
1045         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1046     }
1047     pc->sa = NULL;
1048     pc->ea = NULL;
1049     pc->npoints = 0;
1050     pc->red_curve_is_valid = false;
1051 }
1052
1053
1054 static void
1055 spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
1056 {
1057     g_assert( pc->npoints == 0 );
1058
1059     pc->p[0] = p;
1060     pc->p[1] = p;
1061     pc->npoints = 2;
1062     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1063
1064     sp_canvas_force_full_redraw_after_interruptions(pc->desktop->canvas, 5);
1065 }
1066
1067 static void
1068 spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
1069 {
1070     g_assert( pc->npoints != 0 );
1071     /* todo: Check callers to see whether 2 <= npoints is guaranteed. */
1072
1073     pc->p[2] = p;
1074     pc->p[3] = p;
1075     pc->p[4] = p;
1076     pc->npoints = 5;
1077     sp_curve_reset(pc->red_curve);
1078     sp_curve_moveto(pc->red_curve, pc->p[0]);
1079     bool is_curve;
1080     if ( (pc->onlycurves)
1081          || ( pc->p[1] != pc->p[0] ) )
1082     {
1083         sp_curve_curveto(pc->red_curve, pc->p[1], p, p);
1084         is_curve = true;
1085     } else {
1086         sp_curve_lineto(pc->red_curve, p);
1087         is_curve = false;
1088     }
1089
1090     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1091
1092     if (statusbar) {
1093         // status text
1094         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1095         NR::Point rel = p - pc->p[0];
1096         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1097         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1098         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1099             angle = angle_to_compass (angle);
1100         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path"), is_curve? "Curve segment" : "Line segment", angle, dist->str);
1101         g_string_free(dist, FALSE);
1102     }
1103 }
1104
1105 static void
1106 spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
1107 {
1108     sp_canvas_item_show(pc->c1);
1109     sp_canvas_item_show(pc->cl1);
1110
1111     if ( pc->npoints == 2 ) {
1112         pc->p[1] = p;
1113         sp_canvas_item_hide(pc->c0);
1114         sp_canvas_item_hide(pc->cl0);
1115         SP_CTRL(pc->c1)->moveto(pc->p[1]);
1116         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
1117
1118         // status text
1119         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1120         NR::Point rel = p - pc->p[0];
1121         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1122         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1123         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1124             angle = angle_to_compass (angle);
1125         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"), angle, dist->str);
1126         g_string_free(dist, FALSE);
1127
1128     } else if ( pc->npoints == 5 ) {
1129         pc->p[4] = p;
1130         sp_canvas_item_show(pc->c0);
1131         sp_canvas_item_show(pc->cl0);
1132         bool is_symm = false;
1133         if ( ( ( pc->mode == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
1134              ( ( pc->mode == SP_PEN_CONTEXT_MODE_DRAG ) &&  !( state & GDK_SHIFT_MASK  ) ) ) {
1135             NR::Point delta = p - pc->p[3];
1136             pc->p[2] = pc->p[3] - delta;
1137             is_symm = true;
1138             sp_curve_reset(pc->red_curve);
1139             sp_curve_moveto(pc->red_curve, pc->p[0]);
1140             sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
1141             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1142         }
1143         SP_CTRL(pc->c0)->moveto(pc->p[2]);
1144         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]);
1145         SP_CTRL(pc->c1)->moveto(pc->p[4]);
1146         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]);
1147
1148         // status text
1149         SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1150         NR::Point rel = p - pc->p[3];
1151         GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1152         double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1153         if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1154             angle = angle_to_compass (angle);
1155         pc->_message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>%s</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only"), is_symm? "Curve handle, symmetric" : "Curve handle", angle, dist->str);
1156         g_string_free(dist, FALSE);
1157
1158     } else {
1159         g_warning("Something bad happened - npoints is %d", pc->npoints);
1160     }
1161 }
1162
1163 static void
1164 spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const state)
1165 {
1166     if (!sp_curve_empty(pc->red_curve)) {
1167         sp_curve_append_continuous(pc->green_curve, pc->red_curve, 0.0625);
1168         SPCurve *curve = sp_curve_copy(pc->red_curve);
1169         /// \todo fixme:
1170         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
1171         sp_curve_unref(curve);
1172         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
1173
1174         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
1175
1176         pc->p[0] = pc->p[3];
1177         pc->p[1] = pc->p[4];
1178         pc->npoints = 2;
1179
1180         sp_curve_reset(pc->red_curve);
1181     }
1182 }
1183
1184 static void
1185 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
1186 {
1187     pen_disable_events(pc);
1188
1189     SPDesktop *const desktop = pc->desktop;
1190     pc->_message_context->clear();
1191     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
1192
1193     sp_curve_reset(pc->red_curve);
1194     spdc_concat_colors_and_flush(pc, closed);
1195     pc->sa = NULL;
1196     pc->ea = NULL;
1197
1198     pc->npoints = 0;
1199     pc->state = SP_PEN_CONTEXT_POINT;
1200
1201     sp_canvas_item_hide(pc->c0);
1202     sp_canvas_item_hide(pc->c1);
1203     sp_canvas_item_hide(pc->cl0);
1204     sp_canvas_item_hide(pc->cl1);
1205
1206     if (pc->green_anchor) {
1207         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1208     }
1209
1210
1211     sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
1212
1213     pen_enable_events(pc);
1214 }
1215
1216 static void
1217 pen_disable_events(SPPenContext *const pc) {
1218   pc->events_disabled++;
1219 }
1220
1221 static void
1222 pen_enable_events(SPPenContext *const pc) {
1223   g_return_if_fail(pc->events_disabled != 0);
1224
1225   pc->events_disabled--;
1226 }
1227
1228 /*
1229   Local Variables:
1230   mode:c++
1231   c-file-style:"stroustrup"
1232   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1233   indent-tabs-mode:nil
1234   fill-column:99
1235   End:
1236 */
1237 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :