src/knot.cpp

   1 #define __SP_KNOT_C__
   2
   3 /** \file
   4  * SPKnot implementation
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 1999-2005 authors
  11  * Copyright (C) 2001-2002 Ximian, Inc.
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include <config.h>
  18 #endif
  19 #include <gdk/gdkkeysyms.h>
  20 #include <glibmm/i18n.h>
  21 #include "helper/sp-marshal.h"
  22 #include "display/sodipodi-ctrl.h"
  23 #include "desktop.h"
  24 #include "desktop-handles.h"
  25 #include "knot.h"
  26 #include "document.h"
  27 #include "prefs-utils.h"
  28 #include "message-stack.h"
  29 #include "message-context.h"
  30 #include "event-context.h"
  31 #include "sp-namedview.h"
  32 #include "snap.h"
  33 #include "selection.h"
  34
  35
  36 #define KNOT_EVENT_MASK (GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | \
  37                          GDK_POINTER_MOTION_MASK | \
  38                          GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK)
  39
  40 static bool nograb = false;
  41
  42 static bool grabbed = FALSE;
  43 static bool moved = FALSE;
  44
  45 static gint xp = 0, yp = 0; // where drag started
  46 static gint tolerance = 0;
  47 static bool within_tolerance = false;
  48
  49 static bool transform_escaped = false; // true iff resize or rotate was cancelled by esc.
  50
  51 enum {
  52     EVENT,
  53     CLICKED,
  54     DOUBLECLICKED,
  55     GRABBED,
  56     UNGRABBED,
  57     MOVED,
  58     REQUEST,
  59     DISTANCE,
  60     LAST_SIGNAL
  61 };
  62
  63 static void sp_knot_class_init(SPKnotClass *klass);
  64 static void sp_knot_init(SPKnot *knot);
  65 static void sp_knot_dispose(GObject *object);
  66
  67 static int sp_knot_handler(SPCanvasItem *item, GdkEvent *event, SPKnot *knot);
  68 static void sp_knot_set_ctrl_state(SPKnot *knot);
  69
  70 static GObjectClass *parent_class;
  71 static guint knot_signals[LAST_SIGNAL] = { 0 };
  72
  73 /**
  74  * Registers SPKnot class and returns its type number.
  75  */
  76 GType sp_knot_get_type()
  77 {
  78     static GType type = 0;
  79     if (!type) {
  80         GTypeInfo info = {
  81             sizeof(SPKnotClass),
  82             NULL,       /* base_init */
  83             NULL,       /* base_finalize */
  84             (GClassInitFunc) sp_knot_class_init,
  85             NULL,       /* class_finalize */
  86             NULL,       /* class_data */
  87             sizeof (SPKnot),
  88             16, /* n_preallocs */
  89             (GInstanceInitFunc) sp_knot_init,
  90             NULL
  91         };
  92         type = g_type_register_static (G_TYPE_OBJECT, "SPKnot", &info, (GTypeFlags) 0);
  93     }
  94     return type;
  95 }
  96
  97 /**
  98  * SPKnot vtable initialization.
  99  */
 100 static void sp_knot_class_init(SPKnotClass *klass)
 101 {
 102     GObjectClass *object_class = (GObjectClass*)klass;
 103
 104     parent_class = (GObjectClass*) g_type_class_peek_parent(klass);
 105
 106     object_class->dispose = sp_knot_dispose;
 107
 108     knot_signals[EVENT] = g_signal_new("event",
 109                                        G_TYPE_FROM_CLASS(klass),
 110                                        G_SIGNAL_RUN_LAST,
 111                                        G_STRUCT_OFFSET(SPKnotClass, event),
 112                                        NULL, NULL,
 113                                        sp_marshal_BOOLEAN__POINTER,
 114                                        G_TYPE_BOOLEAN, 1,
 115                                        GDK_TYPE_EVENT);
 116
 117     knot_signals[CLICKED] = g_signal_new("clicked",
 118                                          G_TYPE_FROM_CLASS(klass),
 119                                          G_SIGNAL_RUN_FIRST,
 120                                          G_STRUCT_OFFSET(SPKnotClass, clicked),
 121                                          NULL, NULL,
 122                                          sp_marshal_NONE__UINT,
 123                                          G_TYPE_NONE, 1,
 124                                          G_TYPE_UINT);
 125
 126     knot_signals[DOUBLECLICKED] = g_signal_new("doubleclicked",
 127                                                G_TYPE_FROM_CLASS(klass),
 128                                                G_SIGNAL_RUN_FIRST,
 129                                                G_STRUCT_OFFSET(SPKnotClass, doubleclicked),
 130                                                NULL, NULL,
 131                                                sp_marshal_NONE__UINT,
 132                                                G_TYPE_NONE, 1,
 133                                                G_TYPE_UINT);
 134
 135     knot_signals[GRABBED] = g_signal_new("grabbed",
 136                                           G_TYPE_FROM_CLASS(klass),
 137                                           G_SIGNAL_RUN_FIRST,
 138                                           G_STRUCT_OFFSET(SPKnotClass, grabbed),
 139                                           NULL, NULL,
 140                                           sp_marshal_NONE__UINT,
 141                                           G_TYPE_NONE, 1,
 142                                           G_TYPE_UINT);
 143
 144     knot_signals[UNGRABBED] = g_signal_new("ungrabbed",
 145                                             G_TYPE_FROM_CLASS(klass),
 146                                             G_SIGNAL_RUN_FIRST,
 147                                             G_STRUCT_OFFSET(SPKnotClass, ungrabbed),
 148                                             NULL, NULL,
 149                                             sp_marshal_NONE__UINT,
 150                                             G_TYPE_NONE, 1,
 151                                             G_TYPE_UINT);
 152
 153     knot_signals[MOVED] = g_signal_new("moved",
 154                                         G_TYPE_FROM_CLASS(klass),
 155                                         G_SIGNAL_RUN_FIRST,
 156                                         G_STRUCT_OFFSET(SPKnotClass, moved),
 157                                         NULL, NULL,
 158                                         sp_marshal_NONE__POINTER_UINT,
 159                                         G_TYPE_NONE, 2,
 160                                         G_TYPE_POINTER, G_TYPE_UINT);
 161
 162     knot_signals[REQUEST] = g_signal_new("request",
 163                                          G_TYPE_FROM_CLASS(klass),
 164                                          G_SIGNAL_RUN_LAST,
 165                                          G_STRUCT_OFFSET(SPKnotClass, request),
 166                                          NULL, NULL,
 167                                          sp_marshal_BOOLEAN__POINTER_UINT,
 168                                          G_TYPE_BOOLEAN, 2,
 169                                          G_TYPE_POINTER, G_TYPE_UINT);
 170
 171     knot_signals[DISTANCE] = g_signal_new("distance",
 172                                            G_TYPE_FROM_CLASS(klass),
 173                                            G_SIGNAL_RUN_LAST,
 174                                            G_STRUCT_OFFSET(SPKnotClass, distance),
 175                                            NULL, NULL,
 176                                            sp_marshal_DOUBLE__POINTER_UINT,
 177                                            G_TYPE_DOUBLE, 2,
 178                                            G_TYPE_POINTER, G_TYPE_UINT);
 179
 180     const gchar *nograbenv = getenv("INKSCAPE_NO_GRAB");
 181     nograb = (nograbenv && *nograbenv && (*nograbenv != '0'));
 182 }
 183
 184 /**
 185  * Callback for SPKnot initialization.
 186  */
 187 static void sp_knot_init(SPKnot *knot)
 188 {
 189     knot->desktop = NULL;
 190     knot->item = NULL;
 191     knot->flags = 0;
 192
 193     knot->size = 8;
 194     knot->pos = NR::Point(0, 0);
 195     knot->grabbed_rel_pos = NR::Point(0, 0);
 196     knot->anchor = GTK_ANCHOR_CENTER;
 197     knot->shape = SP_KNOT_SHAPE_SQUARE;
 198     knot->mode = SP_KNOT_MODE_XOR;
 199     knot->tip = NULL;
 200     knot->_event_handler_id = 0;
 201     knot->pressure = 0;
 202
 203     knot->fill[SP_KNOT_STATE_NORMAL] = 0xffffff00;
 204     knot->fill[SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff;
 205     knot->fill[SP_KNOT_STATE_DRAGGING] = 0x0000ffff;
 206
 207     knot->stroke[SP_KNOT_STATE_NORMAL] = 0x01000000;
 208     knot->stroke[SP_KNOT_STATE_MOUSEOVER] = 0x01000000;
 209     knot->stroke[SP_KNOT_STATE_DRAGGING] = 0x01000000;
 210
 211     knot->image[SP_KNOT_STATE_NORMAL] = NULL;
 212     knot->image[SP_KNOT_STATE_MOUSEOVER] = NULL;
 213     knot->image[SP_KNOT_STATE_DRAGGING] = NULL;
 214
 215     knot->cursor[SP_KNOT_STATE_NORMAL] = NULL;
 216     knot->cursor[SP_KNOT_STATE_MOUSEOVER] = NULL;
 217     knot->cursor[SP_KNOT_STATE_DRAGGING] = NULL;
 218
 219     knot->saved_cursor = NULL;
 220     knot->pixbuf = NULL;
 221 }
 222
 223 /**
 224  * Called before SPKnot destruction.
 225  */
 226 static void sp_knot_dispose(GObject *object)
 227 {
 228     SPKnot *knot = (SPKnot *) object;
 229
 230     if ((knot->flags & SP_KNOT_GRABBED) && gdk_pointer_is_grabbed ()) {
 231         // This happens e.g. when deleting a node in node tool while dragging it
 232         gdk_pointer_ungrab (GDK_CURRENT_TIME);
 233     }
 234
 235     if (knot->_event_handler_id > 0)
 236         {
 237         g_signal_handler_disconnect(G_OBJECT (knot->item), knot->_event_handler_id);
 238         knot->_event_handler_id = 0;
 239         }
 240
 241     if (knot->item) {
 242         gtk_object_destroy (GTK_OBJECT (knot->item));
 243         knot->item = NULL;
 244     }
 245
 246     for (gint i = 0; i < SP_KNOT_VISIBLE_STATES; i++) {
 247         if (knot->cursor[i]) {
 248             gdk_cursor_unref(knot->cursor[i]);
 249             knot->cursor[i] = NULL;
 250         }
 251     }
 252
 253     if (knot->tip) {
 254         g_free(knot->tip);
 255         knot->tip = NULL;
 256     }
 257
 258     if (parent_class->dispose) {
 259         (*parent_class->dispose) (object);
 260     }
 261 }
 262
 263 /**
 264  * Update knot for dragging and tell canvas an item was grabbed.
 265  */
 266 void sp_knot_start_dragging(SPKnot *knot, NR::Point p, gint x, gint y, guint32 etime)
 267 {
 268     // save drag origin
 269     xp = x;
 270     yp = y;
 271     within_tolerance = true;
 272
 273     knot->grabbed_rel_pos = p - knot->pos;
 274     knot->drag_origin = knot->pos;
 275     if (!nograb) {
 276         sp_canvas_item_grab(knot->item,
 277                             KNOT_EVENT_MASK,
 278                             knot->cursor[SP_KNOT_STATE_DRAGGING],
 279                             etime);
 280     }
 281     sp_knot_set_flag(knot, SP_KNOT_GRABBED, TRUE);
 282     grabbed = TRUE;
 283 }
 284
 285 /**
 286  * Called to handle events on knots.
 287  */
 288 static int sp_knot_handler(SPCanvasItem *item, GdkEvent *event, SPKnot *knot)
 289 {
 290     g_assert(knot != NULL);
 291     g_assert(SP_IS_KNOT(knot));
 292
 293     /* Run client universal event handler, if present */
 294
 295     gboolean consumed = FALSE;
 296
 297     g_signal_emit(knot, knot_signals[EVENT], 0, event, &consumed);
 298
 299     if (consumed) {
 300         return TRUE;
 301     }
 302
 303     g_object_ref(knot);
 304     tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 305
 306     switch (event->type) {
 307         case GDK_2BUTTON_PRESS:
 308             if (event->button.button == 1) {
 309                 g_signal_emit(knot, knot_signals[DOUBLECLICKED], 0, event->button.state);
 310
 311                 grabbed = FALSE;
 312                 moved = FALSE;
 313                 consumed = TRUE;
 314             }
 315             break;
 316         case GDK_BUTTON_PRESS:
 317             if (event->button.button == 1) {
 318                 NR::Point const p = knot->desktop->w2d(NR::Point(event->button.x, event->button.y));
 319                 sp_knot_start_dragging(knot, p, (gint) event->button.x, (gint) event->button.y, event->button.time);
 320                 consumed = TRUE;
 321             }
 322             break;
 323         case GDK_BUTTON_RELEASE:
 324             if (event->button.button == 1) {
 325                 knot->pressure = 0;
 326                 if (transform_escaped) {
 327                     transform_escaped = false;
 328                     consumed = TRUE;
 329                 } else {
 330                     sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 331                     if (!nograb) {
 332                         sp_canvas_item_ungrab(knot->item, event->button.time);
 333                     }
 334                     if (moved) {
 335                         sp_knot_set_flag(knot,
 336                                          SP_KNOT_DRAGGING,
 337                                          FALSE);
 338                         g_signal_emit(knot,
 339                                       knot_signals[UNGRABBED], 0,
 340                                       event->button.state);
 341                     } else {
 342                         g_signal_emit(knot,
 343                                       knot_signals[CLICKED], 0,
 344                                       event->button.state);
 345                     }
 346                     grabbed = FALSE;
 347                     moved = FALSE;
 348                     consumed = TRUE;
 349                 }
 350             }
 351             break;
 352         case GDK_MOTION_NOTIFY:
 353             if (grabbed) {
 354                 consumed = TRUE;
 355
 356                 if ( within_tolerance
 357                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
 358                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
 359                     break; // do not drag if we're within tolerance from origin
 360                 }
 361
 362                 // Once the user has moved farther than tolerance from the original location
 363                 // (indicating they intend to move the object, not click), then always process the
 364                 // motion notify coordinates as given (no snapping back to origin)
 365                 within_tolerance = false;
 366
 367                 if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &knot->pressure))
 368                     knot->pressure = CLAMP (knot->pressure, 0, 1);
 369                 else
 370                     knot->pressure = 0.5;
 371
 372                 if (!moved) {
 373                     g_signal_emit(knot,
 374                                   knot_signals[GRABBED], 0,
 375                                   event->motion.state);
 376                     sp_knot_set_flag(knot,
 377                                      SP_KNOT_DRAGGING,
 378                                      TRUE);
 379                 }
 380                 NR::Point const motion_w(event->motion.x, event->motion.y);
 381                 NR::Point motion_dt = knot->desktop->w2d(motion_w) - knot->grabbed_rel_pos;
 382
 383                 // Only snap path nodes, for which the anchor is set to GTK_ANCHOR_CENTER
 384                 // (according to default value as set in sp_knot_init())
 385                 // If we have one of the transform handles at hand, then the anchor will be
 386                 // set to e.g. GTK_ANCHOR_SW (see seltrans-handles.cpp). The transform handles
 387                 // will be snapped in seltrans.cpp, not here
 388                 if (knot->anchor == GTK_ANCHOR_CENTER) {
 389                     SnapManager const &m = knot->desktop->namedview->snap_manager;
 390                     SPItem *curr = knot->desktop->selection->singleItem(); //Is this really the only way to get to the item to which this knot belongs?
 391                     motion_dt = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, motion_dt, curr).getPoint();
 392                 }
 393
 394                 sp_knot_request_position (knot, &motion_dt, event->motion.state);
 395                 knot->desktop->scroll_to_point (&motion_dt);
 396                 knot->desktop->set_coordinate_status(knot->pos); // display the coordinate of knot, not cursor - they may be different!
 397                 moved = TRUE;
 398             }
 399             break;
 400         case GDK_ENTER_NOTIFY:
 401             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
 402             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 403
 404             if (knot->tip) {
 405                 knot->desktop->event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, knot->tip);
 406             }
 407
 408             grabbed = FALSE;
 409             moved = FALSE;
 410             consumed = TRUE;
 411             break;
 412         case GDK_LEAVE_NOTIFY:
 413             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
 414             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 415
 416             if (knot->tip) {
 417                 knot->desktop->event_context->defaultMessageContext()->clear();
 418             }
 419
 420             grabbed = FALSE;
 421             moved = FALSE;
 422
 423             consumed = TRUE;
 424             break;
 425         case GDK_KEY_PRESS: // keybindings for knot
 426             switch (get_group0_keyval(&event->key)) {
 427                 case GDK_Escape:
 428                     sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 429                     if (!nograb) {
 430                         sp_canvas_item_ungrab(knot->item, event->button.time);
 431                     }
 432                     if (moved) {
 433                         sp_knot_set_flag(knot,
 434                                          SP_KNOT_DRAGGING,
 435                                          FALSE);
 436                         g_signal_emit(knot,
 437                                       knot_signals[UNGRABBED], 0,
 438                                       event->button.state);
 439                         sp_document_undo(sp_desktop_document(knot->desktop));
 440                         knot->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Node or handle drag canceled."));
 441                         transform_escaped = true;
 442                         consumed = TRUE;
 443                     }
 444                     grabbed = FALSE;
 445                     moved = FALSE;
 446                     break;
 447                 default:
 448                     consumed = FALSE;
 449                     break;
 450             }
 451             break;
 452         default:
 453             break;
 454     }
 455
 456     g_object_unref(knot);
 457
 458     return consumed;
 459 }
 460
 461 /**
 462  * Return new knot object.
 463  */
 464 SPKnot *sp_knot_new(SPDesktop *desktop, const gchar *tip)
 465 {
 466     g_return_val_if_fail(desktop != NULL, NULL);
 467
 468     SPKnot * knot = (SPKnot*) g_object_new(SP_TYPE_KNOT, 0);
 469
 470     knot->desktop = desktop;
 471     knot->flags = SP_KNOT_VISIBLE;
 472     if (tip) {
 473         knot->tip = g_strdup (tip);
 474     }
 475
 476     knot->item = sp_canvas_item_new(sp_desktop_controls (desktop),
 477                                     SP_TYPE_CTRL,
 478                                     "anchor", GTK_ANCHOR_CENTER,
 479                                     "size", 8.0,
 480                                     "filled", TRUE,
 481                                     "fill_color", 0xffffff00,
 482                                     "stroked", TRUE,
 483                                     "stroke_color", 0x01000000,
 484                                     "mode", SP_KNOT_MODE_XOR,
 485                                     NULL);
 486
 487     knot->_event_handler_id = gtk_signal_connect(GTK_OBJECT(knot->item), "event",
 488                                                  GTK_SIGNAL_FUNC(sp_knot_handler), knot);
 489
 490     return knot;
 491 }
 492
 493 /**
 494  * Show knot on its canvas.
 495  */
 496 void sp_knot_show(SPKnot *knot)
 497 {
 498     g_return_if_fail(knot != NULL);
 499     g_return_if_fail(SP_IS_KNOT (knot));
 500
 501     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, TRUE);
 502 }
 503
 504 /**
 505  * Hide knot on its canvas.
 506  */
 507 void sp_knot_hide(SPKnot *knot)
 508 {
 509     g_return_if_fail(knot != NULL);
 510     g_return_if_fail(SP_IS_KNOT(knot));
 511
 512     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, FALSE);
 513 }
 514
 515 /**
 516  * Request or set new position for knot.
 517  */
 518 void sp_knot_request_position(SPKnot *knot, NR::Point *p, guint state)
 519 {
 520     g_return_if_fail(knot != NULL);
 521     g_return_if_fail(SP_IS_KNOT(knot));
 522
 523     gboolean done = FALSE;
 524
 525     g_signal_emit(knot,
 526                   knot_signals[REQUEST], 0,
 527                   p,
 528                   state,
 529                   &done);
 530
 531     /* If user did not complete, we simply move knot to new position */
 532
 533     if (!done) {
 534         sp_knot_set_position (knot, p, state);
 535     }
 536 }
 537
 538 /**
 539  * Return distance of point to knot's position; unused.
 540  */
 541 gdouble sp_knot_distance(SPKnot * knot, NR::Point *p, guint state)
 542 {
 543     g_return_val_if_fail(knot != NULL, 1e18);
 544     g_return_val_if_fail(SP_IS_KNOT(knot), 1e18);
 545
 546     gdouble distance = NR::L2(*p - knot->pos);
 547
 548     g_signal_emit(knot,
 549                   knot_signals[DISTANCE], 0,
 550                   p,
 551                   state,
 552                   &distance);
 553
 554     return distance;
 555 }
 556
 557 /**
 558  * Move knot to new position.
 559  */
 560 void sp_knot_set_position(SPKnot *knot, NR::Point *p, guint state)
 561 {
 562     g_return_if_fail(knot != NULL);
 563     g_return_if_fail(SP_IS_KNOT (knot));
 564
 565     knot->pos = *p;
 566
 567     if (knot->item) {
 568         SP_CTRL(knot->item)->moveto (*p);
 569     }
 570
 571     g_signal_emit(knot,
 572                   knot_signals[MOVED], 0,
 573                   p,
 574                   state);
 575 }
 576
 577 /**
 578  * Move knot to new position, without emitting a MOVED signal.
 579  */
 580 void sp_knot_moveto(SPKnot *knot, NR::Point *p)
 581 {
 582     g_return_if_fail(knot != NULL);
 583     g_return_if_fail(SP_IS_KNOT(knot));
 584
 585     knot->pos = *p;
 586
 587     if (knot->item) {
 588         SP_CTRL(knot->item)->moveto (*p);
 589     }
 590 }
 591
 592 /**
 593  * Returns position of knot.
 594  */
 595 NR::Point sp_knot_position(SPKnot const *knot)
 596 {
 597     g_assert(knot != NULL);
 598     g_assert(SP_IS_KNOT (knot));
 599
 600     return knot->pos;
 601 }
 602
 603 /**
 604  * Set flag in knot, with side effects.
 605  */
 606 void sp_knot_set_flag(SPKnot *knot, guint flag, bool set)
 607 {
 608     g_assert(knot != NULL);
 609     g_assert(SP_IS_KNOT(knot));
 610
 611     if (set) {
 612         knot->flags |= flag;
 613     } else {
 614         knot->flags &= ~flag;
 615     }
 616
 617     switch (flag) {
 618         case SP_KNOT_VISIBLE:
 619             if (set) {
 620                 sp_canvas_item_show(knot->item);
 621             } else {
 622                 sp_canvas_item_hide(knot->item);
 623             }
 624             break;
 625         case SP_KNOT_MOUSEOVER:
 626         case SP_KNOT_DRAGGING:
 627             sp_knot_set_ctrl_state(knot);
 628             break;
 629         case SP_KNOT_GRABBED:
 630             break;
 631         default:
 632             g_assert_not_reached();
 633             break;
 634     }
 635 }
 636
 637 /**
 638  * Update knot's pixbuf and set its control state.
 639  */
 640 void sp_knot_update_ctrl(SPKnot *knot)
 641 {
 642     if (!knot->item) {
 643         return;
 644     }
 645
 646     gtk_object_set(GTK_OBJECT(knot->item), "shape", knot->shape, NULL);
 647     gtk_object_set(GTK_OBJECT(knot->item), "mode", knot->mode, NULL);
 648     gtk_object_set(GTK_OBJECT(knot->item), "size", (gdouble) knot->size, NULL);
 649     gtk_object_set(GTK_OBJECT(knot->item), "anchor", knot->anchor, NULL);
 650     if (knot->pixbuf) {
 651         gtk_object_set(GTK_OBJECT (knot->item), "pixbuf", knot->pixbuf, NULL);
 652     }
 653
 654     sp_knot_set_ctrl_state(knot);
 655 }
 656
 657 /**
 658  * Set knot control state (dragging/mouseover/normal).
 659  */
 660 static void sp_knot_set_ctrl_state(SPKnot *knot)
 661 {
 662     if (knot->flags & SP_KNOT_DRAGGING) {
 663         gtk_object_set(GTK_OBJECT (knot->item),
 664                        "fill_color",
 665                        knot->fill[SP_KNOT_STATE_DRAGGING],
 666                        NULL);
 667         gtk_object_set(GTK_OBJECT (knot->item),
 668                        "stroke_color",
 669                        knot->stroke[SP_KNOT_STATE_DRAGGING],
 670                        NULL);
 671     } else if (knot->flags & SP_KNOT_MOUSEOVER) {
 672         gtk_object_set(GTK_OBJECT(knot->item),
 673                        "fill_color",
 674                        knot->fill[SP_KNOT_STATE_MOUSEOVER],
 675                        NULL);
 676         gtk_object_set(GTK_OBJECT(knot->item),
 677                        "stroke_color",
 678                        knot->stroke[SP_KNOT_STATE_MOUSEOVER],
 679                        NULL);
 680     } else {
 681         gtk_object_set(GTK_OBJECT(knot->item),
 682                        "fill_color",
 683                         knot->fill[SP_KNOT_STATE_NORMAL],
 684                        NULL);
 685         gtk_object_set(GTK_OBJECT(knot->item),
 686                        "stroke_color",
 687                        knot->stroke[SP_KNOT_STATE_NORMAL],
 688                        NULL);
 689     }
 690 }
 691
 692
 693
 694 /*
 695   Local Variables:
 696   mode:c++
 697   c-file-style:"stroustrup"
 698   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 699   indent-tabs-mode:nil
 700   fill-column:99
 701   End:
 702 */
 703 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :