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