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 #include <cstring>
  20 #include <string>
  21
  22 #include "pen-context.h"
  23 #include "sp-namedview.h"
  24 #include "sp-metrics.h"
  25 #include "desktop.h"
  26 #include "desktop-handles.h"
  27 #include "selection.h"
  28 #include "selection-chemistry.h"
  29 #include "draw-anchor.h"
  30 #include "message-stack.h"
  31 #include "message-context.h"
  32 #include "prefs-utils.h"
  33 #include "sp-path.h"
  34 #include "display/curve.h"
  35 #include "pixmaps/cursor-pen.xpm"
  36 #include "display/canvas-bpath.h"
  37 #include "display/sp-ctrlline.h"
  38 #include "display/sodipodi-ctrl.h"
  39 #include <glibmm/i18n.h>
  40 #include "libnr/n-art-bpath.h"
  41 #include "libnr/nr-point-ops.h"
  42 #include "helper/units.h"
  43 #include "macros.h"
  44 #include "context-fns.h"
  45
  46
  47 static void sp_pen_context_class_init(SPPenContextClass *klass);
  48 static void sp_pen_context_init(SPPenContext *pc);
  49 static void sp_pen_context_dispose(GObject *object);
  50
  51 static void sp_pen_context_setup(SPEventContext *ec);
  52 static void sp_pen_context_finish(SPEventContext *ec);
  53 static void sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  54 static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event);
  55 static gint sp_pen_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);
  56
  57 static void spdc_pen_set_initial_point(SPPenContext *pc, NR::Point const p);
  58 static void spdc_pen_set_subsequent_point(SPPenContext *pc, NR::Point const p, bool statusbar);
  59 static void spdc_pen_set_ctrl(SPPenContext *pc, NR::Point const p, guint state);
  60 static void spdc_pen_finish_segment(SPPenContext *pc, NR::Point p, guint state);
  61
  62 static void spdc_pen_finish(SPPenContext *pc, gboolean closed);
  63
  64 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent);
  65 static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent);
  66 static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent);
  67 static gint pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent);
  68 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
  69 static void spdc_reset_colors(SPPenContext *pc);
  70
  71 static void pen_disable_events(SPPenContext *const pc);
  72 static void pen_enable_events(SPPenContext *const pc);
  73
  74 static NR::Point pen_drag_origin_w(0, 0);
  75 static bool pen_within_tolerance = false;
  76
  77 static SPDrawContextClass *pen_parent_class;
  78
  79 /**
  80  * Register SPPenContext with Gdk and return its type.
  81  */
  82 GType
  83 sp_pen_context_get_type(void)
  84 {
  85     static GType type = 0;
  86     if (!type) {
  87         GTypeInfo info = {
  88             sizeof(SPPenContextClass),
  89             NULL, NULL,
  90             (GClassInitFunc) sp_pen_context_class_init,
  91             NULL, NULL,
  92             sizeof(SPPenContext),
  93             4,
  94             (GInstanceInitFunc) sp_pen_context_init,
  95             NULL,   /* value_table */
  96         };
  97         type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0);
  98     }
  99     return type;
 100 }
 101
 102 /**
 103  * Initialize the SPPenContext vtable.
 104  */
 105 static void
 106 sp_pen_context_class_init(SPPenContextClass *klass)
 107 {
 108     GObjectClass *object_class;
 109     SPEventContextClass *event_context_class;
 110
 111     object_class = (GObjectClass *) klass;
 112     event_context_class = (SPEventContextClass *) klass;
 113
 114     pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(klass);
 115
 116     object_class->dispose = sp_pen_context_dispose;
 117
 118     event_context_class->setup = sp_pen_context_setup;
 119     event_context_class->finish = sp_pen_context_finish;
 120     event_context_class->set = sp_pen_context_set;
 121     event_context_class->root_handler = sp_pen_context_root_handler;
 122     event_context_class->item_handler = sp_pen_context_item_handler;
 123 }
 124
 125 /**
 126  * Callback to initialize SPPenContext object.
 127  */
 128 static void
 129 sp_pen_context_init(SPPenContext *pc)
 130 {
 131
 132     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 133
 134     event_context->cursor_shape = cursor_pen_xpm;
 135     event_context->hot_x = 4;
 136     event_context->hot_y = 4;
 137
 138     pc->npoints = 0;
 139     pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 140     pc->state = SP_PEN_CONTEXT_POINT;
 141
 142     pc->c0 = NULL;
 143     pc->c1 = NULL;
 144     pc->cl0 = NULL;
 145     pc->cl1 = NULL;
 146
 147     pc->events_disabled = 0;
 148
 149     pc->polylines_only = false;
 150 }
 151
 152 /**
 153  * Callback to destroy the SPPenContext object's members and itself.
 154  */
 155 static void
 156 sp_pen_context_dispose(GObject *object)
 157 {
 158     SPPenContext *pc;
 159
 160     pc = SP_PEN_CONTEXT(object);
 161
 162     if (pc->c0) {
 163         gtk_object_destroy(GTK_OBJECT(pc->c0));
 164         pc->c0 = NULL;
 165     }
 166     if (pc->c1) {
 167         gtk_object_destroy(GTK_OBJECT(pc->c1));
 168         pc->c1 = NULL;
 169     }
 170     if (pc->cl0) {
 171         gtk_object_destroy(GTK_OBJECT(pc->cl0));
 172         pc->cl0 = NULL;
 173     }
 174     if (pc->cl1) {
 175         gtk_object_destroy(GTK_OBJECT(pc->cl1));
 176         pc->cl1 = NULL;
 177     }
 178
 179     G_OBJECT_CLASS(pen_parent_class)->dispose(object);
 180 }
 181
 182 /**
 183  * Callback to initialize SPPenContext object.
 184  */
 185 static void
 186 sp_pen_context_setup(SPEventContext *ec)
 187 {
 188     SPPenContext *pc;
 189
 190     pc = SP_PEN_CONTEXT(ec);
 191
 192     if (((SPEventContextClass *) pen_parent_class)->setup) {
 193         ((SPEventContextClass *) pen_parent_class)->setup(ec);
 194     }
 195
 196     /* Pen indicators */
 197     pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 198                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 199     pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
 200                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
 201     pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 202     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
 203     pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
 204     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
 205
 206     sp_canvas_item_hide(pc->c0);
 207     sp_canvas_item_hide(pc->c1);
 208     sp_canvas_item_hide(pc->cl0);
 209     sp_canvas_item_hide(pc->cl1);
 210
 211     sp_event_context_read(ec, "mode");
 212
 213     pc->anchor_statusbar = false;
 214
 215     if (prefs_get_int_attribute("tools.freehand.pen", "selcue", 0) != 0) {
 216         ec->enableSelectionCue();
 217     }
 218 }
 219
 220 static void
 221 pen_cancel (SPPenContext *const pc)
 222 {
 223     pc->state = SP_PEN_CONTEXT_STOP;
 224     spdc_reset_colors(pc);
 225     sp_canvas_item_hide(pc->c0);
 226     sp_canvas_item_hide(pc->c1);
 227     sp_canvas_item_hide(pc->cl0);
 228     sp_canvas_item_hide(pc->cl1);
 229     pc->_message_context->clear();
 230     pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
 231
 232     sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
 233 }
 234
 235 /**
 236  * Finalization callback.
 237  */
 238 static void
 239 sp_pen_context_finish(SPEventContext *ec)
 240 {
 241     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 242
 243     if (pc->npoints != 0) {
 244         pen_cancel (pc);
 245     }
 246
 247     if (((SPEventContextClass *) pen_parent_class)->finish) {
 248         ((SPEventContextClass *) pen_parent_class)->finish(ec);
 249     }
 250 }
 251
 252 /**
 253  * Callback that sets key to value in pen context.
 254  */
 255 static void
 256 sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 257 {
 258     SPPenContext *pc = SP_PEN_CONTEXT(ec);
 259
 260     if (!strcmp(key, "mode")) {
 261         if ( val && !strcmp(val, "drag") ) {
 262             pc->mode = SP_PEN_CONTEXT_MODE_DRAG;
 263         } else {
 264             pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
 265         }
 266     }
 267 }
 268
 269 /**
 270  * Snaps new node relative to the previous node.
 271  */
 272 static void
 273 spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state)
 274 {
 275     if (pc->npoints > 0) {
 276         spdc_endpoint_snap_rotation(pc, p, pc->p[0], state);
 277     }
 278
 279     spdc_endpoint_snap_free(pc, p, state);
 280 }
 281
 282 /**
 283  * Snaps new node's handle relative to the new node.
 284  */
 285 static void
 286 spdc_endpoint_snap_handle(SPPenContext const *const pc, NR::Point &p, guint const state)
 287 {
 288     g_return_if_fail(( pc->npoints == 2 ||
 289                        pc->npoints == 5   ));
 290
 291     spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
 292     spdc_endpoint_snap_free(pc, p, state);
 293 }
 294
 295 static gint
 296 sp_pen_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event)
 297 {
 298     SPPenContext *const pc = SP_PEN_CONTEXT(ec);
 299
 300     gint ret = FALSE;
 301
 302     switch (event->type) {
 303         case GDK_BUTTON_PRESS:
 304             ret = pen_handle_button_press(pc, event->button);
 305             break;
 306         default:
 307             break;
 308     }
 309
 310     if (!ret) {
 311         if (((SPEventContextClass *) pen_parent_class)->item_handler)
 312             ret = ((SPEventContextClass *) pen_parent_class)->item_handler(ec, item, event);
 313     }
 314
 315     return ret;
 316 }
 317
 318 /**
 319  * Callback to handle all pen events.
 320  */
 321 static gint
 322 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
 323 {
 324     SPPenContext *const pc = SP_PEN_CONTEXT(ec);
 325
 326     gint ret = FALSE;
 327
 328     switch (event->type) {
 329         case GDK_BUTTON_PRESS:
 330             ret = pen_handle_button_press(pc, event->button);
 331             break;
 332
 333         case GDK_MOTION_NOTIFY:
 334             ret = pen_handle_motion_notify(pc, event->motion);
 335             break;
 336
 337         case GDK_BUTTON_RELEASE:
 338             ret = pen_handle_button_release(pc, event->button);
 339             break;
 340
 341         case GDK_2BUTTON_PRESS:
 342             ret = pen_handle_2button_press(pc, event->button);
 343             break;
 344
 345         case GDK_KEY_PRESS:
 346             ret = pen_handle_key_press(pc, event);
 347             break;
 348
 349         default:
 350             break;
 351     }
 352
 353     if (!ret) {
 354         gint (*const parent_root_handler)(SPEventContext *, GdkEvent *)
 355             = ((SPEventContextClass *) pen_parent_class)->root_handler;
 356         if (parent_root_handler) {
 357             ret = parent_root_handler(ec, event);
 358         }
 359     }
 360
 361     return ret;
 362 }
 363
 364 /**
 365  * Handle mouse button press event.
 366  */
 367 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 368 {
 369     if (pc->events_disabled) {
 370         // skip event processing if events are disabled
 371         return FALSE;
 372     }
 373
 374     SPDrawContext * const dc = SP_DRAW_CONTEXT(pc);
 375     SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 376     NR::Point const event_w(bevent.x, bevent.y);
 377     NR::Point const event_dt(desktop->w2d(event_w));
 378     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 379
 380     gint ret = FALSE;
 381     if (bevent.button == 1 && !event_context->space_panning) {
 382
 383         if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
 384             return TRUE;
 385         }
 386
 387         pen_drag_origin_w = event_w;
 388         pen_within_tolerance = true;
 389
 390         /* Test whether we hit any anchor. */
 391         SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
 392
 393         switch (pc->mode) {
 394             case SP_PEN_CONTEXT_MODE_CLICK:
 395                 /* In click mode we add point on release */
 396                 switch (pc->state) {
 397                     case SP_PEN_CONTEXT_POINT:
 398                     case SP_PEN_CONTEXT_CONTROL:
 399                     case SP_PEN_CONTEXT_CLOSE:
 400                         break;
 401                     case SP_PEN_CONTEXT_STOP:
 402                         /* This is allowed, if we just cancelled curve */
 403                         pc->state = SP_PEN_CONTEXT_POINT;
 404                         break;
 405                     default:
 406                         break;
 407                 }
 408                 break;
 409             case SP_PEN_CONTEXT_MODE_DRAG:
 410                 switch (pc->state) {
 411                     case SP_PEN_CONTEXT_STOP:
 412                         /* This is allowed, if we just cancelled curve */
 413                     case SP_PEN_CONTEXT_POINT:
 414                         if (pc->npoints == 0) {
 415
 416                             if (bevent.state & GDK_CONTROL_MASK) {
 417                                 freehand_create_single_dot(event_context, event_dt, "tools.freehand.pen", bevent.state);
 418                                 ret = TRUE;
 419                                 break;
 420                             }
 421
 422                             /* Set start anchor */
 423                             pc->sa = anchor;
 424                             NR::Point p;
 425                             if (anchor) {
 426
 427                                 /* Adjust point to anchor if needed */
 428                                 p = anchor->dp;
 429                                 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
 430
 431                             } else {
 432
 433                                 // This is the first click of a new curve; deselect item so that
 434                                 // this curve is not combined with it (unless it is drawn from its
 435                                 // anchor, which is handled by the sibling branch above)
 436                                 Inkscape::Selection * const selection = sp_desktop_selection(desktop);
 437                                 if (!(bevent.state & GDK_SHIFT_MASK)) {
 438
 439                                     selection->clear();
 440                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
 441
 442                                 } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
 443
 444                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
 445                                 }
 446
 447                                 /* Create green anchor */
 448                                 p = event_dt;
 449                                 spdc_endpoint_snap(pc, p, bevent.state);
 450                                 pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
 451                             }
 452                             spdc_pen_set_initial_point(pc, p);
 453                         } else {
 454
 455                             /* Set end anchor */
 456                             pc->ea = anchor;
 457                             NR::Point p;
 458                             if (anchor) {
 459
 460                                 p = anchor->dp;
 461                                 // we hit an anchor, will finish the curve (either with or without closing)
 462                                 // in release handler
 463                                 pc->state = SP_PEN_CONTEXT_CLOSE;
 464
 465                                 if (pc->green_anchor && pc->green_anchor->active) {
 466                                     // we clicked on the current curve start, so close it even if
 467                                     // we drag a handle away from it
 468                                     dc->green_closed = TRUE;
 469                                 }
 470                                 ret = TRUE;
 471                                 break;
 472
 473                             } else {
 474
 475                                 p = event_dt;
 476                                 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
 477                                 spdc_pen_set_subsequent_point(pc, p, true);
 478                                 if (pc->polylines_only) {
 479                                     spdc_pen_finish_segment(pc, p, bevent.state);
 480                                 }
 481                             }
 482
 483                         }
 484                         pc->state = pc->polylines_only ? SP_PEN_CONTEXT_POINT : SP_PEN_CONTEXT_CONTROL;
 485                         ret = TRUE;
 486                         break;
 487                     case SP_PEN_CONTEXT_CONTROL:
 488                         g_warning("Button down in CONTROL state");
 489                         break;
 490                     case SP_PEN_CONTEXT_CLOSE:
 491                         g_warning("Button down in CLOSE state");
 492                         break;
 493                     default:
 494                         break;
 495                 }
 496                 break;
 497             default:
 498                 break;
 499         }
 500     } else if (bevent.button == 3) {
 501         if (pc->npoints != 0) {
 502
 503             spdc_pen_finish_segment(pc, event_dt, bevent.state);
 504             if (pc->green_closed) {
 505                 // finishing at the start anchor, close curve
 506                 spdc_pen_finish(pc, TRUE);
 507             } else {
 508                 // finishing at some other anchor, finish curve but not close
 509                 spdc_pen_finish(pc, FALSE);
 510             }
 511
 512             ret = TRUE;
 513         }
 514     }
 515
 516     return ret;
 517 }
 518
 519 /**
 520  * Handle motion_notify event.
 521  */
 522 static gint
 523 pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
 524 {
 525     gint ret = FALSE;
 526
 527     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 528
 529     if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
 530         // allow scrolling
 531         return FALSE;
 532     }
 533
 534     if (pc->events_disabled) {
 535         // skip motion events if pen events are disabled
 536         return FALSE;
 537     }
 538
 539     NR::Point const event_w(mevent.x,
 540                             mevent.y);
 541     if (pen_within_tolerance) {
 542         gint const tolerance = prefs_get_int_attribute_limited("options.dragtolerance",
 543                                                                "value", 0, 0, 100);
 544         if ( NR::LInfty( event_w - pen_drag_origin_w ) < tolerance ) {
 545             return FALSE;   // Do not drag if we're within tolerance from origin.
 546         }
 547     }
 548     // Once the user has moved farther than tolerance from the original location
 549     // (indicating they intend to move the object, not click), then always process the
 550     // motion notify coordinates as given (no snapping back to origin)
 551     pen_within_tolerance = false;
 552
 553     SPDesktop *const dt = pc->desktop;
 554     if ( ( mevent.state & GDK_BUTTON1_MASK ) && !pc->grab ) {
 555         /* Grab mouse, so release will not pass unnoticed */
 556         pc->grab = SP_CANVAS_ITEM(dt->acetate);
 557         sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK   |
 558                                         GDK_BUTTON_RELEASE_MASK |
 559                                         GDK_POINTER_MOTION_MASK  ),
 560                             NULL, mevent.time);
 561     }
 562
 563     /* Find desktop coordinates */
 564     NR::Point p = dt->w2d(event_w);
 565
 566     /* Test, whether we hit any anchor */
 567     SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 568
 569     switch (pc->mode) {
 570         case SP_PEN_CONTEXT_MODE_CLICK:
 571             switch (pc->state) {
 572                 case SP_PEN_CONTEXT_POINT:
 573                     if ( pc->npoints != 0 ) {
 574                         /* Only set point, if we are already appending */
 575                         spdc_endpoint_snap(pc, p, mevent.state);
 576                         spdc_pen_set_subsequent_point(pc, p, true);
 577                         ret = TRUE;
 578                     }
 579                     break;
 580                 case SP_PEN_CONTEXT_CONTROL:
 581                 case SP_PEN_CONTEXT_CLOSE:
 582                     /* Placing controls is last operation in CLOSE state */
 583                     spdc_endpoint_snap(pc, p, mevent.state);
 584                     spdc_pen_set_ctrl(pc, p, mevent.state);
 585                     ret = TRUE;
 586                     break;
 587                 case SP_PEN_CONTEXT_STOP:
 588                     /* This is perfectly valid */
 589                     break;
 590                 default:
 591                     break;
 592             }
 593             break;
 594         case SP_PEN_CONTEXT_MODE_DRAG:
 595             switch (pc->state) {
 596                 case SP_PEN_CONTEXT_POINT:
 597                     if ( pc->npoints > 0 ) {
 598                         /* Only set point, if we are already appending */
 599
 600                         if (!anchor) {   /* Snap node only if not hitting anchor */
 601                             spdc_endpoint_snap(pc, p, mevent.state);
 602                         }
 603
 604                         spdc_pen_set_subsequent_point(pc, p, !anchor);
 605
 606                         if (anchor && !pc->anchor_statusbar) {
 607                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
 608                             pc->anchor_statusbar = true;
 609                         } else if (!anchor && pc->anchor_statusbar) {
 610                             pc->_message_context->clear();
 611                             pc->anchor_statusbar = false;
 612                         }
 613
 614                         ret = TRUE;
 615                     } else {
 616                         if (anchor && !pc->anchor_statusbar) {
 617                             pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
 618                             pc->anchor_statusbar = true;
 619                         } else if (!anchor && pc->anchor_statusbar) {
 620                             pc->_message_context->clear();
 621                             pc->anchor_statusbar = false;
 622                         }
 623                     }
 624                     break;
 625                 case SP_PEN_CONTEXT_CONTROL:
 626                 case SP_PEN_CONTEXT_CLOSE:
 627                     /* Placing controls is last operation in CLOSE state */
 628
 629                     // snap the handle
 630                     spdc_endpoint_snap_handle(pc, p, mevent.state);
 631
 632                     if (!pc->polylines_only) {
 633                         spdc_pen_set_ctrl(pc, p, mevent.state);
 634                     } else {
 635                         spdc_pen_set_ctrl(pc, pc->p[1], mevent.state);
 636                     }
 637                     gobble_motion_events(GDK_BUTTON1_MASK);
 638                     ret = TRUE;
 639                     break;
 640                 case SP_PEN_CONTEXT_STOP:
 641                     /* This is perfectly valid */
 642                     break;
 643                 default:
 644                     break;
 645             }
 646             break;
 647         default:
 648             break;
 649     }
 650     return ret;
 651 }
 652
 653 /**
 654  * Handle mouse button release event.
 655  */
 656 static gint
 657 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
 658 {
 659     if (pc->events_disabled) {
 660         // skip event processing if events are disabled
 661         return FALSE;
 662     }
 663
 664     gint ret = FALSE;
 665     SPEventContext *event_context = SP_EVENT_CONTEXT(pc);
 666     if ( revent.button == 1  && !event_context->space_panning) {
 667
 668         SPDrawContext *dc = SP_DRAW_CONTEXT (pc);
 669
 670         NR::Point const event_w(revent.x,
 671                                 revent.y);
 672         /* Find desktop coordinates */
 673         NR::Point p = pc->desktop->w2d(event_w);
 674
 675         /* Test whether we hit any anchor. */
 676         SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
 677
 678         switch (pc->mode) {
 679             case SP_PEN_CONTEXT_MODE_CLICK:
 680                 switch (pc->state) {
 681                     case SP_PEN_CONTEXT_POINT:
 682                         if ( pc->npoints == 0 ) {
 683                             /* Start new thread only with button release */
 684                             if (anchor) {
 685                                 p = anchor->dp;
 686                             }
 687                             pc->sa = anchor;
 688                             spdc_pen_set_initial_point(pc, p);
 689                         } else {
 690                             /* Set end anchor here */
 691                             pc->ea = anchor;
 692                             if (anchor) {
 693                                 p = anchor->dp;
 694                             }
 695                         }
 696                         pc->state = SP_PEN_CONTEXT_CONTROL;
 697                         ret = TRUE;
 698                         break;
 699                     case SP_PEN_CONTEXT_CONTROL:
 700                         /* End current segment */
 701                         spdc_endpoint_snap(pc, p, revent.state);
 702                         spdc_pen_finish_segment(pc, p, revent.state);
 703                         pc->state = SP_PEN_CONTEXT_POINT;
 704                         ret = TRUE;
 705                         break;
 706                     case SP_PEN_CONTEXT_CLOSE:
 707                         /* End current segment */
 708                         if (!anchor) {   /* Snap node only if not hitting anchor */
 709                             spdc_endpoint_snap(pc, p, revent.state);
 710                         }
 711                         spdc_pen_finish_segment(pc, p, revent.state);
 712                         spdc_pen_finish(pc, TRUE);
 713                         pc->state = SP_PEN_CONTEXT_POINT;
 714                         ret = TRUE;
 715                         break;
 716                     case SP_PEN_CONTEXT_STOP:
 717                         /* This is allowed, if we just cancelled curve */
 718                         pc->state = SP_PEN_CONTEXT_POINT;
 719                         ret = TRUE;
 720                         break;
 721                     default:
 722                         break;
 723                 }
 724                 break;
 725             case SP_PEN_CONTEXT_MODE_DRAG:
 726                 switch (pc->state) {
 727                     case SP_PEN_CONTEXT_POINT:
 728                     case SP_PEN_CONTEXT_CONTROL:
 729                         if (!pc->polylines_only) {
 730                             spdc_endpoint_snap(pc, p, revent.state);
 731                             spdc_pen_finish_segment(pc, p, revent.state);
 732                         }
 733                         break;
 734                     case SP_PEN_CONTEXT_CLOSE:
 735                         spdc_endpoint_snap(pc, p, revent.state);
 736                         spdc_pen_finish_segment(pc, p, revent.state);
 737                         if (pc->green_closed) {
 738                             // finishing at the start anchor, close curve
 739                             spdc_pen_finish(pc, TRUE);
 740                         } else {
 741                             // finishing at some other anchor, finish curve but not close
 742                             spdc_pen_finish(pc, FALSE);
 743                         }
 744                         break;
 745                     case SP_PEN_CONTEXT_STOP:
 746                         /* This is allowed, if we just cancelled curve */
 747                         break;
 748                     default:
 749                         break;
 750                 }
 751                 pc->state = SP_PEN_CONTEXT_POINT;
 752                 ret = TRUE;
 753                 break;
 754             default:
 755                 break;
 756         }
 757
 758         if (pc->grab) {
 759             /* Release grab now */
 760             sp_canvas_item_ungrab(pc->grab, revent.time);
 761             pc->grab = NULL;
 762         }
 763
 764         ret = TRUE;
 765
 766         dc->green_closed = FALSE;
 767     }
 768
 769     return ret;
 770 }
 771
 772 static gint
 773 pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 774 {
 775     gint ret = FALSE;
 776     if (pc->npoints != 0 && bevent.button != 2) {
 777         spdc_pen_finish(pc, FALSE);
 778         ret = TRUE;
 779     }
 780     return ret;
 781 }
 782
 783 void
 784 pen_redraw_all (SPPenContext *const pc)
 785 {
 786     // green
 787     if (pc->green_bpaths) {
 788         // remove old piecewise green canvasitems
 789         while (pc->green_bpaths) {
 790             gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
 791             pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
 792         }
 793         // one canvas bpath for all of green_curve
 794         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
 795         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 796         sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
 797
 798         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
 799     }
 800
 801     if (pc->green_anchor)
 802         SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
 803
 804     pc->red_curve->reset();
 805     pc->red_curve->moveto(pc->p[0]);
 806     pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
 807     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
 808
 809     // handles
 810     if (pc->p[0] != pc->p[1]) {
 811         SP_CTRL(pc->c1)->moveto(pc->p[1]);
 812         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
 813         sp_canvas_item_show (pc->c1);
 814         sp_canvas_item_show (pc->cl1);
 815     } else {
 816         sp_canvas_item_hide (pc->c1);
 817         sp_canvas_item_hide (pc->cl1);
 818     }
 819
 820     NArtBpath const * bpath = pc->green_curve->last_bpath();
 821     if (bpath) {
 822         if (bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
 823             SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
 824             sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
 825             sp_canvas_item_show (pc->c0);
 826             sp_canvas_item_show (pc->cl0);
 827         } else {
 828             sp_canvas_item_hide (pc->c0);
 829             sp_canvas_item_hide (pc->cl0);
 830         }
 831     }
 832 }
 833
 834 void
 835 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
 836 {
 837     if (pc->npoints != 5)
 838         return;
 839
 840     // green
 841     NArtBpath const * bpath = pc->green_curve->last_bpath();
 842     if (bpath) {
 843         pc->green_curve->last_point_additive_move( Geom::Point(x,y) );
 844     } else {
 845         // start anchor too
 846         if (pc->green_anchor) {
 847             pc->green_anchor->dp += NR::Point(x, y);
 848         }
 849     }
 850
 851     // red
 852     pc->p[0] += NR::Point(x, y);
 853     pc->p[1] += NR::Point(x, y);
 854     pen_redraw_all(pc);
 855 }
 856
 857 void
 858 pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
 859 {
 860     pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
 861 }
 862
 863 void
 864 pen_lastpoint_tocurve (SPPenContext *const pc)
 865 {
 866     if (pc->npoints != 5)
 867         return;
 868
 869     // red
 870     NArtBpath const * bpath = pc->green_curve->last_bpath();
 871     if (bpath && bpath->code == NR_CURVETO) {
 872         pc->p[1] = pc->p[0] + (NR::Point(bpath->x3, bpath->y3) - NR::Point(bpath->x2, bpath->y2));
 873     } else {
 874         pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
 875     }
 876
 877     pen_redraw_all(pc);
 878 }
 879
 880 void
 881 pen_lastpoint_toline (SPPenContext *const pc)
 882 {
 883     if (pc->npoints != 5)
 884         return;
 885
 886     pc->p[1] = pc->p[0];
 887
 888     pen_redraw_all(pc);
 889 }
 890
 891
 892 static gint
 893 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
 894 {
 895     gint ret = FALSE;
 896     gdouble const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
 897
 898     switch (get_group0_keyval (&event->key)) {
 899
 900         case GDK_Left: // move last point left
 901         case GDK_KP_Left:
 902         case GDK_KP_4:
 903             if (!MOD__CTRL) { // not ctrl
 904                 if (MOD__ALT) { // alt
 905                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift
 906                     else pen_lastpoint_move_screen(pc, -1, 0); // no shift
 907                 }
 908                 else { // no alt
 909                     if (MOD__SHIFT) pen_lastpoint_move(pc, -10*nudge, 0); // shift
 910                     else pen_lastpoint_move(pc, -nudge, 0); // no shift
 911                 }
 912                 ret = TRUE;
 913             }
 914             break;
 915         case GDK_Up: // move last point up
 916         case GDK_KP_Up:
 917         case GDK_KP_8:
 918             if (!MOD__CTRL) { // not ctrl
 919                 if (MOD__ALT) { // alt
 920                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift
 921                     else pen_lastpoint_move_screen(pc, 0, 1); // no shift
 922                 }
 923                 else { // no alt
 924                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, 10*nudge); // shift
 925                     else pen_lastpoint_move(pc, 0, nudge); // no shift
 926                 }
 927                 ret = TRUE;
 928             }
 929             break;
 930         case GDK_Right: // move last point right
 931         case GDK_KP_Right:
 932         case GDK_KP_6:
 933             if (!MOD__CTRL) { // not ctrl
 934                 if (MOD__ALT) { // alt
 935                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift
 936                     else pen_lastpoint_move_screen(pc, 1, 0); // no shift
 937                 }
 938                 else { // no alt
 939                     if (MOD__SHIFT) pen_lastpoint_move(pc, 10*nudge, 0); // shift
 940                     else pen_lastpoint_move(pc, nudge, 0); // no shift
 941                 }
 942                 ret = TRUE;
 943             }
 944             break;
 945         case GDK_Down: // move last point down
 946         case GDK_KP_Down:
 947         case GDK_KP_2:
 948             if (!MOD__CTRL) { // not ctrl
 949                 if (MOD__ALT) { // alt
 950                     if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift
 951                     else pen_lastpoint_move_screen(pc, 0, -1); // no shift
 952                 }
 953                 else { // no alt
 954                     if (MOD__SHIFT) pen_lastpoint_move(pc, 0, -10*nudge); // shift
 955                     else pen_lastpoint_move(pc, 0, -nudge); // no shift
 956                 }
 957                 ret = TRUE;
 958             }
 959             break;
 960
 961         case GDK_U:
 962         case GDK_u:
 963             if (MOD__SHIFT_ONLY) {
 964                 pen_lastpoint_tocurve(pc);
 965                 ret = TRUE;
 966             }
 967             break;
 968         case GDK_L:
 969         case GDK_l:
 970             if (MOD__SHIFT_ONLY) {
 971                 pen_lastpoint_toline(pc);
 972                 ret = TRUE;
 973             }
 974             break;
 975
 976         case GDK_Return:
 977         case GDK_KP_Enter:
 978             if (pc->npoints != 0) {
 979                 spdc_pen_finish(pc, FALSE);
 980                 ret = TRUE;
 981             }
 982             break;
 983         case GDK_Escape:
 984             if (pc->npoints != 0) {
 985                 // if drawing, cancel, otherwise pass it up for deselecting
 986                 pen_cancel (pc);
 987                 ret = TRUE;
 988             }
 989             break;
 990         case GDK_z:
 991         case GDK_Z:
 992             if (MOD__CTRL_ONLY && pc->npoints != 0) {
 993                 // if drawing, cancel, otherwise pass it up for undo
 994                 pen_cancel (pc);
 995                 ret = TRUE;
 996             }
 997             break;
 998         case GDK_g:
 999         case GDK_G:
1000             if (MOD__SHIFT_ONLY) {
1001                 sp_selection_to_guides();
1002                 ret = true;
1003             }
1004             break;
1005         case GDK_BackSpace:
1006         case GDK_Delete:
1007         case GDK_KP_Delete:
1008             if (pc->green_curve->is_empty()) {
1009                 if (!pc->red_curve->is_empty()) {
1010                     pen_cancel (pc);
1011                     ret = TRUE;
1012                 } else {
1013                     // do nothing; this event should be handled upstream
1014                 }
1015             } else {
1016                 /* Reset red curve */
1017                 pc->red_curve->reset();
1018                 /* Destroy topmost green bpath */
1019                 if (pc->green_bpaths) {
1020                     if (pc->green_bpaths->data)
1021                         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1022                     pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1023                 }
1024                 /* Get last segment */
1025                 NArtBpath const *const p = SP_CURVE_BPATH(pc->green_curve);
1026                 gint const e = SP_CURVE_LENGTH(pc->green_curve);
1027                 if ( e < 2 ) {
1028                     g_warning("Green curve length is %d", e);
1029                     break;
1030                 }
1031                 pc->p[0] = p[e - 2].c(3);
1032                 if (p[e - 1].code == NR_CURVETO) {
1033                     pc->p[1] = p[e - 1].c(1);
1034                 } else {
1035                     pc->p[1] = pc->p[0];
1036                 }
1037                 NR::Point const pt(( pc->npoints < 4
1038                                      ? p[e - 1].c(3)
1039                                      : pc->p[3] ));
1040                 pc->npoints = 2;
1041                 pc->green_curve->backspace();
1042                 sp_canvas_item_hide(pc->c0);
1043                 sp_canvas_item_hide(pc->c1);
1044                 sp_canvas_item_hide(pc->cl0);
1045                 sp_canvas_item_hide(pc->cl1);
1046                 pc->state = SP_PEN_CONTEXT_POINT;
1047                 spdc_pen_set_subsequent_point(pc, pt, true);
1048                 ret = TRUE;
1049             }
1050             break;
1051         default:
1052             break;
1053     }
1054     return ret;
1055 }
1056
1057 static void
1058 spdc_reset_colors(SPPenContext *pc)
1059 {
1060     /* Red */
1061     pc->red_curve->reset();
1062     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1063     /* Blue */
1064     pc->blue_curve->reset();
1065     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
1066     /* Green */
1067     while (pc->green_bpaths) {
1068         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
1069         pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
1070     }
1071     pc->green_curve->reset();
1072     if (pc->green_anchor) {
1073         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1074     }
1075     pc->sa = NULL;
1076     pc->ea = NULL;
1077     pc->npoints = 0;
1078     pc->red_curve_is_valid = false;
1079 }
1080
1081
1082 static void
1083 spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
1084 {
1085     g_assert( pc->npoints == 0 );
1086
1087     pc->p[0] = p;
1088     pc->p[1] = p;
1089     pc->npoints = 2;
1090     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
1091
1092     sp_canvas_force_full_redraw_after_interruptions(pc->desktop->canvas, 5);
1093 }
1094
1095 /**
1096  * Show the status message for the current line/curve segment.
1097  * This type of message always shows angle/distance as the last
1098  * two parameters ("angle %3.2f&#176;, distance %s").
1099  */
1100 static void
1101 spdc_pen_set_angle_distance_status_message(SPPenContext *const pc, NR::Point const p, int pc_point_to_compare, gchar const *message)
1102 {
1103     g_assert(pc != NULL);
1104     g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles
1105     g_assert(message != NULL);
1106
1107     SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
1108     NR::Point rel = p - pc->p[pc_point_to_compare];
1109     GString *dist = SP_PX_TO_METRIC_STRING(NR::L2(rel), desktop->namedview->getDefaultMetric());
1110     double angle = atan2(rel[NR::Y], rel[NR::X]) * 180 / M_PI;
1111     if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0)
1112         angle = angle_to_compass (angle);
1113
1114     pc->_message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist->str);
1115     g_string_free(dist, FALSE);
1116 }
1117
1118 static void
1119 spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool statusbar)
1120 {
1121     g_assert( pc->npoints != 0 );
1122     /* todo: Check callers to see whether 2 <= npoints is guaranteed. */
1123
1124     pc->p[2] = p;
1125     pc->p[3] = p;
1126     pc->p[4] = p;
1127     pc->npoints = 5;
1128     pc->red_curve->reset();
1129     pc->red_curve->moveto(pc->p[0]);
1130     bool is_curve;
1131     if ( (pc->onlycurves)
1132          || ( pc->p[1] != pc->p[0] ) )
1133     {
1134         pc->red_curve->curveto(pc->p[1], p, p);
1135         is_curve = true;
1136     } else {
1137         pc->red_curve->lineto(p);
1138         is_curve = false;
1139     }
1140
1141     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1142
1143     if (statusbar) {
1144         gchar *message = is_curve ?
1145             _("<b>Curve segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path" ):
1146             _("<b>Line segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path");
1147         spdc_pen_set_angle_distance_status_message(pc, p, 0, message);
1148     }
1149 }
1150
1151 static void
1152 spdc_pen_set_ctrl(SPPenContext *const pc, NR::Point const p, guint const state)
1153 {
1154     sp_canvas_item_show(pc->c1);
1155     sp_canvas_item_show(pc->cl1);
1156
1157     if ( pc->npoints == 2 ) {
1158         pc->p[1] = p;
1159         sp_canvas_item_hide(pc->c0);
1160         sp_canvas_item_hide(pc->cl0);
1161         SP_CTRL(pc->c1)->moveto(pc->p[1]);
1162         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
1163
1164         spdc_pen_set_angle_distance_status_message(pc, p, 0, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"));
1165     } else if ( pc->npoints == 5 ) {
1166         pc->p[4] = p;
1167         sp_canvas_item_show(pc->c0);
1168         sp_canvas_item_show(pc->cl0);
1169         bool is_symm = false;
1170         if ( ( ( pc->mode == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
1171              ( ( pc->mode == SP_PEN_CONTEXT_MODE_DRAG ) &&  !( state & GDK_SHIFT_MASK  ) ) ) {
1172             NR::Point delta = p - pc->p[3];
1173             pc->p[2] = pc->p[3] - delta;
1174             is_symm = true;
1175             pc->red_curve->reset();
1176             pc->red_curve->moveto(pc->p[0]);
1177             pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
1178             sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
1179         }
1180         SP_CTRL(pc->c0)->moveto(pc->p[2]);
1181         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]);
1182         SP_CTRL(pc->c1)->moveto(pc->p[4]);
1183         sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]);
1184
1185         gchar *message = is_symm ?
1186             _("<b>Curve handle, symmetric</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") :
1187             _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only");
1188         spdc_pen_set_angle_distance_status_message(pc, p, 3, message);
1189     } else {
1190         g_warning("Something bad happened - npoints is %d", pc->npoints);
1191     }
1192 }
1193
1194 static void
1195 spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const /*p*/, guint const /*state*/)
1196 {
1197     if (!pc->red_curve->is_empty()) {
1198         pc->green_curve->append_continuous(pc->red_curve, 0.0625);
1199         SPCurve *curve = pc->red_curve->copy();
1200         /// \todo fixme:
1201         SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
1202         curve->unref();
1203         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
1204
1205         pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
1206
1207         pc->p[0] = pc->p[3];
1208         pc->p[1] = pc->p[4];
1209         pc->npoints = 2;
1210
1211         pc->red_curve->reset();
1212     }
1213 }
1214
1215 static void
1216 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
1217 {
1218     pen_disable_events(pc);
1219
1220     SPDesktop *const desktop = pc->desktop;
1221     pc->_message_context->clear();
1222     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
1223
1224     pc->red_curve->reset();
1225     spdc_concat_colors_and_flush(pc, closed);
1226     pc->sa = NULL;
1227     pc->ea = NULL;
1228
1229     pc->npoints = 0;
1230     pc->state = SP_PEN_CONTEXT_POINT;
1231
1232     sp_canvas_item_hide(pc->c0);
1233     sp_canvas_item_hide(pc->c1);
1234     sp_canvas_item_hide(pc->cl0);
1235     sp_canvas_item_hide(pc->cl1);
1236
1237     if (pc->green_anchor) {
1238         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
1239     }
1240
1241
1242     sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
1243
1244     pen_enable_events(pc);
1245 }
1246
1247 static void
1248 pen_disable_events(SPPenContext *const pc) {
1249   pc->events_disabled++;
1250 }
1251
1252 static void
1253 pen_enable_events(SPPenContext *const pc) {
1254   g_return_if_fail(pc->events_disabled != 0);
1255
1256   pc->events_disabled--;
1257 }
1258
1259 /*
1260   Local Variables:
1261   mode:c++
1262   c-file-style:"stroustrup"
1263   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1264   indent-tabs-mode:nil
1265   fill-column:99
1266   End:
1267 */
1268 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :