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 "preferences.h"
  28 #include "message-stack.h"
  29 #include "message-context.h"
  30 #include "event-context.h"
  31
  32 #define KNOT_EVENT_MASK (GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | \
  33                          GDK_POINTER_MOTION_MASK | \
  34                          GDK_POINTER_MOTION_HINT_MASK | \
  35                          GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK)
  36
  37 static bool nograb = false;
  38
  39 static bool grabbed = FALSE;
  40 static bool moved = FALSE;
  41
  42 static gint xp = 0, yp = 0; // where drag started
  43 static gint tolerance = 0;
  44 static bool within_tolerance = false;
  45
  46 static bool transform_escaped = false; // true iff resize or rotate was cancelled by esc.
  47
  48 enum {
  49     EVENT,
  50     CLICKED,
  51     DOUBLECLICKED,
  52     GRABBED,
  53     UNGRABBED,
  54     MOVED,
  55     REQUEST,
  56     DISTANCE,
  57     LAST_SIGNAL
  58 };
  59
  60 static void sp_knot_class_init(SPKnotClass *klass);
  61 static void sp_knot_init(SPKnot *knot);
  62 static void sp_knot_dispose(GObject *object);
  63
  64 static int sp_knot_handler(SPCanvasItem *item, GdkEvent *event, SPKnot *knot);
  65 static void sp_knot_set_ctrl_state(SPKnot *knot);
  66
  67 static GObjectClass *parent_class;
  68 static guint knot_signals[LAST_SIGNAL] = { 0 };
  69
  70 /**
  71  * Registers SPKnot class and returns its type number.
  72  */
  73 GType sp_knot_get_type()
  74 {
  75     static GType type = 0;
  76     if (!type) {
  77         GTypeInfo info = {
  78             sizeof(SPKnotClass),
  79             NULL,       /* base_init */
  80             NULL,       /* base_finalize */
  81             (GClassInitFunc) sp_knot_class_init,
  82             NULL,       /* class_finalize */
  83             NULL,       /* class_data */
  84             sizeof (SPKnot),
  85             16, /* n_preallocs */
  86             (GInstanceInitFunc) sp_knot_init,
  87             NULL
  88         };
  89         type = g_type_register_static (G_TYPE_OBJECT, "SPKnot", &info, (GTypeFlags) 0);
  90     }
  91     return type;
  92 }
  93
  94 /**
  95  * SPKnot vtable initialization.
  96  */
  97 static void sp_knot_class_init(SPKnotClass *klass)
  98 {
  99     GObjectClass *object_class = (GObjectClass*)klass;
 100
 101     parent_class = (GObjectClass*) g_type_class_peek_parent(klass);
 102
 103     object_class->dispose = sp_knot_dispose;
 104
 105     knot_signals[EVENT] = g_signal_new("event",
 106                                        G_TYPE_FROM_CLASS(klass),
 107                                        G_SIGNAL_RUN_LAST,
 108                                        G_STRUCT_OFFSET(SPKnotClass, event),
 109                                        NULL, NULL,
 110                                        sp_marshal_BOOLEAN__POINTER,
 111                                        G_TYPE_BOOLEAN, 1,
 112                                        GDK_TYPE_EVENT);
 113
 114     knot_signals[CLICKED] = g_signal_new("clicked",
 115                                          G_TYPE_FROM_CLASS(klass),
 116                                          G_SIGNAL_RUN_FIRST,
 117                                          G_STRUCT_OFFSET(SPKnotClass, clicked),
 118                                          NULL, NULL,
 119                                          g_cclosure_marshal_VOID__UINT,
 120                                          G_TYPE_NONE, 1,
 121                                          G_TYPE_UINT);
 122
 123     knot_signals[DOUBLECLICKED] = g_signal_new("doubleclicked",
 124                                                G_TYPE_FROM_CLASS(klass),
 125                                                G_SIGNAL_RUN_FIRST,
 126                                                G_STRUCT_OFFSET(SPKnotClass, doubleclicked),
 127                                                NULL, NULL,
 128                                                g_cclosure_marshal_VOID__UINT,
 129                                                G_TYPE_NONE, 1,
 130                                                G_TYPE_UINT);
 131
 132     knot_signals[GRABBED] = g_signal_new("grabbed",
 133                                           G_TYPE_FROM_CLASS(klass),
 134                                           G_SIGNAL_RUN_FIRST,
 135                                           G_STRUCT_OFFSET(SPKnotClass, grabbed),
 136                                           NULL, NULL,
 137                                           g_cclosure_marshal_VOID__UINT,
 138                                           G_TYPE_NONE, 1,
 139                                           G_TYPE_UINT);
 140
 141     knot_signals[UNGRABBED] = g_signal_new("ungrabbed",
 142                                             G_TYPE_FROM_CLASS(klass),
 143                                             G_SIGNAL_RUN_FIRST,
 144                                             G_STRUCT_OFFSET(SPKnotClass, ungrabbed),
 145                                             NULL, NULL,
 146                                             g_cclosure_marshal_VOID__UINT,
 147                                             G_TYPE_NONE, 1,
 148                                             G_TYPE_UINT);
 149
 150     knot_signals[MOVED] = g_signal_new("moved",
 151                                         G_TYPE_FROM_CLASS(klass),
 152                                         G_SIGNAL_RUN_FIRST,
 153                                         G_STRUCT_OFFSET(SPKnotClass, moved),
 154                                         NULL, NULL,
 155                                         sp_marshal_NONE__POINTER_UINT,
 156                                         G_TYPE_NONE, 2,
 157                                         G_TYPE_POINTER, G_TYPE_UINT);
 158
 159     knot_signals[REQUEST] = g_signal_new("request",
 160                                          G_TYPE_FROM_CLASS(klass),
 161                                          G_SIGNAL_RUN_LAST,
 162                                          G_STRUCT_OFFSET(SPKnotClass, request),
 163                                          NULL, NULL,
 164                                          sp_marshal_BOOLEAN__POINTER_UINT,
 165                                          G_TYPE_BOOLEAN, 2,
 166                                          G_TYPE_POINTER, G_TYPE_UINT);
 167
 168     knot_signals[DISTANCE] = g_signal_new("distance",
 169                                            G_TYPE_FROM_CLASS(klass),
 170                                            G_SIGNAL_RUN_LAST,
 171                                            G_STRUCT_OFFSET(SPKnotClass, distance),
 172                                            NULL, NULL,
 173                                            sp_marshal_DOUBLE__POINTER_UINT,
 174                                            G_TYPE_DOUBLE, 2,
 175                                            G_TYPE_POINTER, G_TYPE_UINT);
 176
 177     const gchar *nograbenv = getenv("INKSCAPE_NO_GRAB");
 178     nograb = (nograbenv && *nograbenv && (*nograbenv != '0'));
 179 }
 180
 181 /**
 182  * Callback for SPKnot initialization.
 183  */
 184 static void sp_knot_init(SPKnot *knot)
 185 {
 186     knot->desktop = NULL;
 187     knot->item = NULL;
 188     knot->flags = 0;
 189
 190     knot->size = 8;
 191     knot->pos = Geom::Point(0, 0);
 192     knot->grabbed_rel_pos = Geom::Point(0, 0);
 193     knot->anchor = GTK_ANCHOR_CENTER;
 194     knot->shape = SP_KNOT_SHAPE_SQUARE;
 195     knot->mode = SP_KNOT_MODE_XOR;
 196     knot->tip = NULL;
 197     knot->_event_handler_id = 0;
 198     knot->pressure = 0;
 199
 200     knot->fill[SP_KNOT_STATE_NORMAL] = 0xffffff00;
 201     knot->fill[SP_KNOT_STATE_MOUSEOVER] = 0xff0000ff;
 202     knot->fill[SP_KNOT_STATE_DRAGGING] = 0x0000ffff;
 203
 204     knot->stroke[SP_KNOT_STATE_NORMAL] = 0x01000000;
 205     knot->stroke[SP_KNOT_STATE_MOUSEOVER] = 0x01000000;
 206     knot->stroke[SP_KNOT_STATE_DRAGGING] = 0x01000000;
 207
 208     knot->image[SP_KNOT_STATE_NORMAL] = NULL;
 209     knot->image[SP_KNOT_STATE_MOUSEOVER] = NULL;
 210     knot->image[SP_KNOT_STATE_DRAGGING] = NULL;
 211
 212     knot->cursor[SP_KNOT_STATE_NORMAL] = NULL;
 213     knot->cursor[SP_KNOT_STATE_MOUSEOVER] = NULL;
 214     knot->cursor[SP_KNOT_STATE_DRAGGING] = NULL;
 215
 216     knot->saved_cursor = NULL;
 217     knot->pixbuf = NULL;
 218 }
 219
 220 /**
 221  * Called before SPKnot destruction.
 222  */
 223 static void sp_knot_dispose(GObject *object)
 224 {
 225     SPKnot *knot = (SPKnot *) object;
 226
 227     if ((knot->flags & SP_KNOT_GRABBED) && gdk_pointer_is_grabbed ()) {
 228         // This happens e.g. when deleting a node in node tool while dragging it
 229         gdk_pointer_ungrab (GDK_CURRENT_TIME);
 230     }
 231
 232     if (knot->_event_handler_id > 0)
 233         {
 234         g_signal_handler_disconnect(G_OBJECT (knot->item), knot->_event_handler_id);
 235         knot->_event_handler_id = 0;
 236         }
 237
 238     if (knot->item) {
 239         gtk_object_destroy (GTK_OBJECT (knot->item));
 240         knot->item = NULL;
 241     }
 242
 243     for (gint i = 0; i < SP_KNOT_VISIBLE_STATES; i++) {
 244         if (knot->cursor[i]) {
 245             gdk_cursor_unref(knot->cursor[i]);
 246             knot->cursor[i] = NULL;
 247         }
 248     }
 249
 250     if (knot->tip) {
 251         g_free(knot->tip);
 252         knot->tip = NULL;
 253     }
 254
 255     if (parent_class->dispose) {
 256         (*parent_class->dispose) (object);
 257     }
 258 }
 259
 260 /**
 261  * Update knot for dragging and tell canvas an item was grabbed.
 262  */
 263 void sp_knot_start_dragging(SPKnot *knot, Geom::Point const &p, gint x, gint y, guint32 etime)
 264 {
 265     // save drag origin
 266     xp = x;
 267     yp = y;
 268     within_tolerance = true;
 269
 270     knot->grabbed_rel_pos = p - knot->pos;
 271     knot->drag_origin = knot->pos;
 272     if (!nograb) {
 273         sp_canvas_item_grab(knot->item,
 274                             KNOT_EVENT_MASK,
 275                             knot->cursor[SP_KNOT_STATE_DRAGGING],
 276                             etime);
 277     }
 278     sp_knot_set_flag(knot, SP_KNOT_GRABBED, TRUE);
 279     grabbed = TRUE;
 280 }
 281
 282 /**
 283  * Called to handle events on knots.
 284  */
 285 static int sp_knot_handler(SPCanvasItem */*item*/, GdkEvent *event, SPKnot *knot)
 286 {
 287     g_assert(knot != NULL);
 288     g_assert(SP_IS_KNOT(knot));
 289
 290     /* Run client universal event handler, if present */
 291
 292     gboolean consumed = FALSE;
 293
 294     g_signal_emit(knot, knot_signals[EVENT], 0, event, &consumed);
 295
 296     if (consumed) {
 297         return TRUE;
 298     }
 299
 300     g_object_ref(knot);
 301     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 302     tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
 303
 304     switch (event->type) {
 305     case GDK_2BUTTON_PRESS:
 306             if (event->button.button == 1) {
 307                 g_signal_emit(knot, knot_signals[DOUBLECLICKED], 0, event->button.state);
 308
 309                 grabbed = FALSE;
 310                 moved = FALSE;
 311                 consumed = TRUE;
 312             }
 313             break;
 314     case GDK_BUTTON_PRESS:
 315             if (event->button.button == 1 && !knot->desktop->event_context->space_panning) {
 316                 Geom::Point const p = knot->desktop->w2d(Geom::Point(event->button.x, event->button.y));
 317                 sp_knot_start_dragging(knot, p, (gint) event->button.x, (gint) event->button.y, event->button.time);
 318                 consumed = TRUE;
 319             }
 320             break;
 321     case GDK_BUTTON_RELEASE:
 322             if (event->button.button == 1 && !knot->desktop->event_context->space_panning) {
 323                 // If we have any pending snap event, then invoke it now
 324                 if (knot->desktop->event_context->_delayed_snap_event) {
 325                     sp_event_context_snap_watchdog_callback(knot->desktop->event_context->_delayed_snap_event);
 326                 }
 327
 328                 sp_event_context_discard_delayed_snap_event(knot->desktop->event_context);
 329
 330                 knot->pressure = 0;
 331                 if (transform_escaped) {
 332                     transform_escaped = false;
 333                     consumed = TRUE;
 334                 } else {
 335                     sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 336                     if (!nograb) {
 337                         sp_canvas_item_ungrab(knot->item, event->button.time);
 338                     }
 339                     if (moved) {
 340                         sp_knot_set_flag(knot,
 341                                          SP_KNOT_DRAGGING,
 342                                          FALSE);
 343                         g_signal_emit(knot,
 344                                       knot_signals[UNGRABBED], 0,
 345                                       event->button.state);
 346                         knot->_ungrabbed_signal.emit(knot);
 347                     } else {
 348                         g_signal_emit(knot,
 349                                       knot_signals[CLICKED], 0,
 350                                       event->button.state);
 351                         knot->_click_signal.emit(knot, event->button.state);
 352                     }
 353                     grabbed = FALSE;
 354                     moved = FALSE;
 355                     consumed = TRUE;
 356                 }
 357             }
 358             break;
 359     case GDK_MOTION_NOTIFY:
 360             if (grabbed && !knot->desktop->event_context->space_panning) {
 361                 consumed = TRUE;
 362
 363                 if ( within_tolerance
 364                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
 365                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
 366                     break; // do not drag if we're within tolerance from origin
 367                 }
 368
 369                 // Once the user has moved farther than tolerance from the original location
 370                 // (indicating they intend to move the object, not click), then always process the
 371                 // motion notify coordinates as given (no snapping back to origin)
 372                 within_tolerance = false;
 373
 374                 if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &knot->pressure))
 375                     knot->pressure = CLAMP (knot->pressure, 0, 1);
 376                 else
 377                     knot->pressure = 0.5;
 378
 379                 if (!moved) {
 380                     g_signal_emit(knot,
 381                                   knot_signals[GRABBED], 0,
 382                                   event->motion.state);
 383                     sp_knot_set_flag(knot,
 384                                      SP_KNOT_DRAGGING,
 385                                      TRUE);
 386                 }
 387                 sp_event_context_snap_delay_handler(knot->desktop->event_context, NULL, (gpointer) knot, (GdkEventMotion *)event, DelayedSnapEvent::KNOT_HANDLER);
 388                 sp_knot_handler_request_position(event, knot);
 389                 moved = TRUE;
 390             }
 391             break;
 392     case GDK_ENTER_NOTIFY:
 393             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
 394             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 395
 396             if (knot->tip) {
 397                 knot->desktop->event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, knot->tip);
 398             }
 399
 400             grabbed = FALSE;
 401             moved = FALSE;
 402             consumed = TRUE;
 403             break;
 404     case GDK_LEAVE_NOTIFY:
 405             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
 406             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 407
 408             if (knot->tip) {
 409                 knot->desktop->event_context->defaultMessageContext()->clear();
 410             }
 411
 412             grabbed = FALSE;
 413             moved = FALSE;
 414             consumed = TRUE;
 415             break;
 416     case GDK_KEY_PRESS: // keybindings for knot
 417             switch (get_group0_keyval(&event->key)) {
 418                 case GDK_Escape:
 419                             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 420                             if (!nograb) {
 421                                 sp_canvas_item_ungrab(knot->item, event->button.time);
 422                             }
 423                             if (moved) {
 424                                 sp_knot_set_flag(knot,
 425                                                  SP_KNOT_DRAGGING,
 426                                                  FALSE);
 427                                 g_signal_emit(knot,
 428                                               knot_signals[UNGRABBED], 0,
 429                                               event->button.state);
 430                                 SPDocumentUndo::undo(sp_desktop_document(knot->desktop));
 431                                 knot->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Node or handle drag canceled."));
 432                                 transform_escaped = true;
 433                                 consumed = TRUE;
 434                             }
 435                             grabbed = FALSE;
 436                             moved = FALSE;
 437                             sp_event_context_discard_delayed_snap_event(knot->desktop->event_context);
 438                             break;
 439                 default:
 440                             consumed = FALSE;
 441                             break;
 442                     }
 443                     break;
 444     default:
 445             break;
 446     }
 447
 448     g_object_unref(knot);
 449
 450     return consumed;
 451 }
 452
 453 void sp_knot_handler_request_position(GdkEvent *event, SPKnot *knot)
 454 {
 455     Geom::Point const motion_w(event->motion.x, event->motion.y);
 456     Geom::Point const motion_dt = knot->desktop->w2d(motion_w);
 457     Geom::Point p = motion_dt - knot->grabbed_rel_pos;
 458     sp_knot_request_position (knot, p, event->motion.state);
 459     knot->desktop->scroll_to_point (motion_dt);
 460     knot->desktop->set_coordinate_status(knot->pos); // display the coordinate of knot, not cursor - they may be different!
 461     if (event->motion.state & GDK_BUTTON1_MASK)
 462         gobble_motion_events(GDK_BUTTON1_MASK);
 463 }
 464
 465 /**
 466  * Return new knot object.
 467  */
 468 SPKnot *sp_knot_new(SPDesktop *desktop, const gchar *tip)
 469 {
 470     g_return_val_if_fail(desktop != NULL, NULL);
 471
 472     SPKnot * knot = (SPKnot*) g_object_new(SP_TYPE_KNOT, 0);
 473
 474     knot->desktop = desktop;
 475     knot->flags = SP_KNOT_VISIBLE;
 476     if (tip) {
 477         knot->tip = g_strdup (tip);
 478     }
 479
 480     knot->item = sp_canvas_item_new(sp_desktop_controls (desktop),
 481                                     SP_TYPE_CTRL,
 482                                     "anchor", GTK_ANCHOR_CENTER,
 483                                     "size", 8.0,
 484                                     "filled", TRUE,
 485                                     "fill_color", 0xffffff00,
 486                                     "stroked", TRUE,
 487                                     "stroke_color", 0x01000000,
 488                                     "mode", SP_KNOT_MODE_XOR,
 489                                     NULL);
 490
 491     knot->_event_handler_id = gtk_signal_connect(GTK_OBJECT(knot->item), "event",
 492                                                  GTK_SIGNAL_FUNC(sp_knot_handler), knot);
 493
 494     return knot;
 495 }
 496
 497 /**
 498  * Show knot on its canvas.
 499  */
 500 void sp_knot_show(SPKnot *knot)
 501 {
 502     g_return_if_fail(knot != NULL);
 503     g_return_if_fail(SP_IS_KNOT (knot));
 504
 505     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, TRUE);
 506 }
 507
 508 /**
 509  * Hide knot on its canvas.
 510  */
 511 void sp_knot_hide(SPKnot *knot)
 512 {
 513     g_return_if_fail(knot != NULL);
 514     g_return_if_fail(SP_IS_KNOT(knot));
 515
 516     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, FALSE);
 517 }
 518
 519 /**
 520  * Request or set new position for knot.
 521  */
 522 void sp_knot_request_position(SPKnot *knot, Geom::Point const &p, guint state)
 523 {
 524     g_return_if_fail(knot != NULL);
 525     g_return_if_fail(SP_IS_KNOT(knot));
 526
 527     gboolean done = FALSE;
 528
 529     g_signal_emit(knot,
 530                   knot_signals[REQUEST], 0,
 531                   &p,
 532                   state,
 533                   &done);
 534
 535     /* If user did not complete, we simply move knot to new position */
 536
 537     if (!done) {
 538         sp_knot_set_position (knot, p, state);
 539     }
 540 }
 541
 542 /**
 543  * Return distance of point to knot's position; unused.
 544  */
 545 gdouble sp_knot_distance(SPKnot * knot, Geom::Point const &p, guint state)
 546 {
 547     g_return_val_if_fail(knot != NULL, 1e18);
 548     g_return_val_if_fail(SP_IS_KNOT(knot), 1e18);
 549
 550     gdouble distance = Geom::L2(p - knot->pos);
 551
 552     g_signal_emit(knot,
 553                   knot_signals[DISTANCE], 0,
 554                   &p,
 555                   state,
 556                   &distance);
 557
 558     return distance;
 559 }
 560
 561 /**
 562  * Move knot to new position.
 563  */
 564 void sp_knot_set_position(SPKnot *knot, Geom::Point const &p, guint state)
 565 {
 566     g_return_if_fail(knot != NULL);
 567     g_return_if_fail(SP_IS_KNOT (knot));
 568
 569     knot->pos = p;
 570
 571     if (knot->item) {
 572         SP_CTRL(knot->item)->moveto (p);
 573     }
 574
 575     g_signal_emit(knot,
 576                   knot_signals[MOVED], 0,
 577                   &p,
 578                   state);
 579     knot->_moved_signal.emit(knot, p, state);
 580 }
 581
 582 /**
 583  * Move knot to new position, without emitting a MOVED signal.
 584  */
 585 void sp_knot_moveto(SPKnot *knot, Geom::Point const &p)
 586 {
 587     g_return_if_fail(knot != NULL);
 588     g_return_if_fail(SP_IS_KNOT(knot));
 589
 590     knot->pos = p;
 591
 592     if (knot->item) {
 593         SP_CTRL(knot->item)->moveto (p);
 594     }
 595 }
 596
 597 /**
 598  * Returns position of knot.
 599  */
 600 Geom::Point sp_knot_position(SPKnot const *knot)
 601 {
 602     g_assert(knot != NULL);
 603     g_assert(SP_IS_KNOT (knot));
 604
 605     return knot->pos;
 606 }
 607
 608 /**
 609  * Set flag in knot, with side effects.
 610  */
 611 void sp_knot_set_flag(SPKnot *knot, guint flag, bool set)
 612 {
 613     g_assert(knot != NULL);
 614     g_assert(SP_IS_KNOT(knot));
 615
 616     if (set) {
 617         knot->flags |= flag;
 618     } else {
 619         knot->flags &= ~flag;
 620     }
 621
 622     switch (flag) {
 623     case SP_KNOT_VISIBLE:
 624             if (set) {
 625                 sp_canvas_item_show(knot->item);
 626             } else {
 627                 sp_canvas_item_hide(knot->item);
 628             }
 629             break;
 630     case SP_KNOT_MOUSEOVER:
 631     case SP_KNOT_DRAGGING:
 632             sp_knot_set_ctrl_state(knot);
 633             break;
 634     case SP_KNOT_GRABBED:
 635             break;
 636     default:
 637             g_assert_not_reached();
 638             break;
 639     }
 640 }
 641
 642 /**
 643  * Update knot's pixbuf and set its control state.
 644  */
 645 void sp_knot_update_ctrl(SPKnot *knot)
 646 {
 647     if (!knot->item) {
 648         return;
 649     }
 650
 651     gtk_object_set(GTK_OBJECT(knot->item), "shape", knot->shape, NULL);
 652     gtk_object_set(GTK_OBJECT(knot->item), "mode", knot->mode, NULL);
 653     gtk_object_set(GTK_OBJECT(knot->item), "size", (gdouble) knot->size, NULL);
 654     gtk_object_set(GTK_OBJECT(knot->item), "anchor", knot->anchor, NULL);
 655     if (knot->pixbuf) {
 656         gtk_object_set(GTK_OBJECT (knot->item), "pixbuf", knot->pixbuf, NULL);
 657     }
 658
 659     sp_knot_set_ctrl_state(knot);
 660 }
 661
 662 /**
 663  * Set knot control state (dragging/mouseover/normal).
 664  */
 665 static void sp_knot_set_ctrl_state(SPKnot *knot)
 666 {
 667     if (knot->flags & SP_KNOT_DRAGGING) {
 668         gtk_object_set(GTK_OBJECT (knot->item),
 669                        "fill_color",
 670                        knot->fill[SP_KNOT_STATE_DRAGGING],
 671                        NULL);
 672         gtk_object_set(GTK_OBJECT (knot->item),
 673                        "stroke_color",
 674                        knot->stroke[SP_KNOT_STATE_DRAGGING],
 675                        NULL);
 676     } else if (knot->flags & SP_KNOT_MOUSEOVER) {
 677         gtk_object_set(GTK_OBJECT(knot->item),
 678                        "fill_color",
 679                        knot->fill[SP_KNOT_STATE_MOUSEOVER],
 680                        NULL);
 681         gtk_object_set(GTK_OBJECT(knot->item),
 682                        "stroke_color",
 683                        knot->stroke[SP_KNOT_STATE_MOUSEOVER],
 684                        NULL);
 685     } else {
 686         gtk_object_set(GTK_OBJECT(knot->item),
 687                        "fill_color",
 688                         knot->fill[SP_KNOT_STATE_NORMAL],
 689                        NULL);
 690         gtk_object_set(GTK_OBJECT(knot->item),
 691                        "stroke_color",
 692                        knot->stroke[SP_KNOT_STATE_NORMAL],
 693                        NULL);
 694     }
 695 }
 696
 697
 698
 699 /*
 700   Local Variables:
 701   mode:c++
 702   c-file-style:"stroustrup"
 703   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 704   indent-tabs-mode:nil
 705   fill-column:99
 706   End:
 707 */
 708 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :