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