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_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                                          sp_marshal_NONE__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                                                sp_marshal_NONE__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                                           sp_marshal_NONE__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                                             sp_marshal_NONE__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 = NR::Point(0, 0);
 192     knot->grabbed_rel_pos = NR::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, NR::Point 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     tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
 302
 303     switch (event->type) {
 304         case GDK_2BUTTON_PRESS:
 305             if (event->button.button == 1) {
 306                 g_signal_emit(knot, knot_signals[DOUBLECLICKED], 0, event->button.state);
 307
 308                 grabbed = FALSE;
 309                 moved = FALSE;
 310                 consumed = TRUE;
 311             }
 312             break;
 313         case GDK_BUTTON_PRESS:
 314             if (event->button.button == 1 && !knot->desktop->event_context->space_panning) {
 315                 NR::Point const p = knot->desktop->w2d(NR::Point(event->button.x, event->button.y));
 316                 sp_knot_start_dragging(knot, p, (gint) event->button.x, (gint) event->button.y, event->button.time);
 317                 consumed = TRUE;
 318             }
 319             break;
 320         case GDK_BUTTON_RELEASE:
 321             if (event->button.button == 1 && !knot->desktop->event_context->space_panning) {
 322                 knot->pressure = 0;
 323                 if (transform_escaped) {
 324                     transform_escaped = false;
 325                     consumed = TRUE;
 326                 } else {
 327                     sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 328                     if (!nograb) {
 329                         sp_canvas_item_ungrab(knot->item, event->button.time);
 330                     }
 331                     if (moved) {
 332                         sp_knot_set_flag(knot,
 333                                          SP_KNOT_DRAGGING,
 334                                          FALSE);
 335                         g_signal_emit(knot,
 336                                       knot_signals[UNGRABBED], 0,
 337                                       event->button.state);
 338                         knot->_ungrabbed_signal.emit();
 339                     } else {
 340                         g_signal_emit(knot,
 341                                       knot_signals[CLICKED], 0,
 342                                       event->button.state);
 343                         knot->_click_signal.emit(knot, event->button.state);
 344                     }
 345                     grabbed = FALSE;
 346                     moved = FALSE;
 347                     consumed = TRUE;
 348                 }
 349             }
 350             break;
 351         case GDK_MOTION_NOTIFY:
 352             if (grabbed && !knot->desktop->event_context->space_panning) {
 353                 consumed = TRUE;
 354
 355                 if ( within_tolerance
 356                      && ( abs( (gint) event->motion.x - xp ) < tolerance )
 357                      && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
 358                     break; // do not drag if we're within tolerance from origin
 359                 }
 360
 361                 // Once the user has moved farther than tolerance from the original location
 362                 // (indicating they intend to move the object, not click), then always process the
 363                 // motion notify coordinates as given (no snapping back to origin)
 364                 within_tolerance = false;
 365
 366                 if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &knot->pressure))
 367                     knot->pressure = CLAMP (knot->pressure, 0, 1);
 368                 else
 369                     knot->pressure = 0.5;
 370
 371                 if (!moved) {
 372                     g_signal_emit(knot,
 373                                   knot_signals[GRABBED], 0,
 374                                   event->motion.state);
 375                     sp_knot_set_flag(knot,
 376                                      SP_KNOT_DRAGGING,
 377                                      TRUE);
 378                 }
 379                 NR::Point const motion_w(event->motion.x, event->motion.y);
 380                 NR::Point const motion_dt = knot->desktop->w2d(motion_w);
 381                 NR::Point p = motion_dt - knot->grabbed_rel_pos;
 382                 sp_knot_request_position (knot, &p, event->motion.state);
 383                 knot->desktop->scroll_to_point (&motion_dt);
 384                 knot->desktop->set_coordinate_status(knot->pos); // display the coordinate of knot, not cursor - they may be different!
 385                 if (event->motion.state & GDK_BUTTON1_MASK)
 386                     gobble_motion_events(GDK_BUTTON1_MASK);
 387                 moved = TRUE;
 388             }
 389             break;
 390         case GDK_ENTER_NOTIFY:
 391             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
 392             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 393
 394             if (knot->tip) {
 395                 knot->desktop->event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, knot->tip);
 396             }
 397
 398             grabbed = FALSE;
 399             moved = FALSE;
 400             consumed = TRUE;
 401             break;
 402         case GDK_LEAVE_NOTIFY:
 403             sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
 404             sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 405
 406             if (knot->tip) {
 407                 knot->desktop->event_context->defaultMessageContext()->clear();
 408             }
 409
 410             grabbed = FALSE;
 411             moved = FALSE;
 412
 413             consumed = TRUE;
 414             break;
 415         case GDK_KEY_PRESS: // keybindings for knot
 416             switch (get_group0_keyval(&event->key)) {
 417                 case GDK_Escape:
 418                     sp_knot_set_flag(knot, SP_KNOT_GRABBED, FALSE);
 419                     if (!nograb) {
 420                         sp_canvas_item_ungrab(knot->item, event->button.time);
 421                     }
 422                     if (moved) {
 423                         sp_knot_set_flag(knot,
 424                                          SP_KNOT_DRAGGING,
 425                                          FALSE);
 426                         g_signal_emit(knot,
 427                                       knot_signals[UNGRABBED], 0,
 428                                       event->button.state);
 429                         sp_document_undo(sp_desktop_document(knot->desktop));
 430                         knot->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Node or handle drag canceled."));
 431                         transform_escaped = true;
 432                         consumed = TRUE;
 433                     }
 434                     grabbed = FALSE;
 435                     moved = FALSE;
 436                     break;
 437                 default:
 438                     consumed = FALSE;
 439                     break;
 440             }
 441             break;
 442         default:
 443             break;
 444     }
 445
 446     g_object_unref(knot);
 447
 448     return consumed;
 449 }
 450
 451 /**
 452  * Return new knot object.
 453  */
 454 SPKnot *sp_knot_new(SPDesktop *desktop, const gchar *tip)
 455 {
 456     g_return_val_if_fail(desktop != NULL, NULL);
 457
 458     SPKnot * knot = (SPKnot*) g_object_new(SP_TYPE_KNOT, 0);
 459
 460     knot->desktop = desktop;
 461     knot->flags = SP_KNOT_VISIBLE;
 462     if (tip) {
 463         knot->tip = g_strdup (tip);
 464     }
 465
 466     knot->item = sp_canvas_item_new(sp_desktop_controls (desktop),
 467                                     SP_TYPE_CTRL,
 468                                     "anchor", GTK_ANCHOR_CENTER,
 469                                     "size", 8.0,
 470                                     "filled", TRUE,
 471                                     "fill_color", 0xffffff00,
 472                                     "stroked", TRUE,
 473                                     "stroke_color", 0x01000000,
 474                                     "mode", SP_KNOT_MODE_XOR,
 475                                     NULL);
 476
 477     knot->_event_handler_id = gtk_signal_connect(GTK_OBJECT(knot->item), "event",
 478                                                  GTK_SIGNAL_FUNC(sp_knot_handler), knot);
 479
 480     return knot;
 481 }
 482
 483 /**
 484  * Show knot on its canvas.
 485  */
 486 void sp_knot_show(SPKnot *knot)
 487 {
 488     g_return_if_fail(knot != NULL);
 489     g_return_if_fail(SP_IS_KNOT (knot));
 490
 491     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, TRUE);
 492 }
 493
 494 /**
 495  * Hide knot on its canvas.
 496  */
 497 void sp_knot_hide(SPKnot *knot)
 498 {
 499     g_return_if_fail(knot != NULL);
 500     g_return_if_fail(SP_IS_KNOT(knot));
 501
 502     sp_knot_set_flag(knot, SP_KNOT_VISIBLE, FALSE);
 503 }
 504
 505 /**
 506  * Request or set new position for knot.
 507  */
 508 void sp_knot_request_position(SPKnot *knot, NR::Point *p, guint state)
 509 {
 510     g_return_if_fail(knot != NULL);
 511     g_return_if_fail(SP_IS_KNOT(knot));
 512
 513     gboolean done = FALSE;
 514
 515     g_signal_emit(knot,
 516                   knot_signals[REQUEST], 0,
 517                   p,
 518                   state,
 519                   &done);
 520
 521     /* If user did not complete, we simply move knot to new position */
 522
 523     if (!done) {
 524         sp_knot_set_position (knot, p, state);
 525     }
 526 }
 527
 528 /**
 529  * Return distance of point to knot's position; unused.
 530  */
 531 gdouble sp_knot_distance(SPKnot * knot, NR::Point *p, guint state)
 532 {
 533     g_return_val_if_fail(knot != NULL, 1e18);
 534     g_return_val_if_fail(SP_IS_KNOT(knot), 1e18);
 535
 536     gdouble distance = NR::L2(*p - knot->pos);
 537
 538     g_signal_emit(knot,
 539                   knot_signals[DISTANCE], 0,
 540                   p,
 541                   state,
 542                   &distance);
 543
 544     return distance;
 545 }
 546
 547 /**
 548  * Move knot to new position.
 549  */
 550 void sp_knot_set_position(SPKnot *knot, NR::Point *p, guint state)
 551 {
 552     g_return_if_fail(knot != NULL);
 553     g_return_if_fail(SP_IS_KNOT (knot));
 554
 555     knot->pos = *p;
 556
 557     if (knot->item) {
 558         SP_CTRL(knot->item)->moveto (*p);
 559     }
 560
 561     g_signal_emit(knot,
 562                   knot_signals[MOVED], 0,
 563                   p,
 564                   state);
 565     knot->_moved_signal.emit(knot, p, state);
 566 }
 567
 568 /**
 569  * Move knot to new position, without emitting a MOVED signal.
 570  */
 571 void sp_knot_moveto(SPKnot *knot, NR::Point *p)
 572 {
 573     g_return_if_fail(knot != NULL);
 574     g_return_if_fail(SP_IS_KNOT(knot));
 575
 576     knot->pos = *p;
 577
 578     if (knot->item) {
 579         SP_CTRL(knot->item)->moveto (*p);
 580     }
 581 }
 582
 583 /**
 584  * Returns position of knot.
 585  */
 586 NR::Point sp_knot_position(SPKnot const *knot)
 587 {
 588     g_assert(knot != NULL);
 589     g_assert(SP_IS_KNOT (knot));
 590
 591     return knot->pos;
 592 }
 593
 594 /**
 595  * Set flag in knot, with side effects.
 596  */
 597 void sp_knot_set_flag(SPKnot *knot, guint flag, bool set)
 598 {
 599     g_assert(knot != NULL);
 600     g_assert(SP_IS_KNOT(knot));
 601
 602     if (set) {
 603         knot->flags |= flag;
 604     } else {
 605         knot->flags &= ~flag;
 606     }
 607
 608     switch (flag) {
 609         case SP_KNOT_VISIBLE:
 610             if (set) {
 611                 sp_canvas_item_show(knot->item);
 612             } else {
 613                 sp_canvas_item_hide(knot->item);
 614             }
 615             break;
 616         case SP_KNOT_MOUSEOVER:
 617         case SP_KNOT_DRAGGING:
 618             sp_knot_set_ctrl_state(knot);
 619             break;
 620         case SP_KNOT_GRABBED:
 621             break;
 622         default:
 623             g_assert_not_reached();
 624             break;
 625     }
 626 }
 627
 628 /**
 629  * Update knot's pixbuf and set its control state.
 630  */
 631 void sp_knot_update_ctrl(SPKnot *knot)
 632 {
 633     if (!knot->item) {
 634         return;
 635     }
 636
 637     gtk_object_set(GTK_OBJECT(knot->item), "shape", knot->shape, NULL);
 638     gtk_object_set(GTK_OBJECT(knot->item), "mode", knot->mode, NULL);
 639     gtk_object_set(GTK_OBJECT(knot->item), "size", (gdouble) knot->size, NULL);
 640     gtk_object_set(GTK_OBJECT(knot->item), "anchor", knot->anchor, NULL);
 641     if (knot->pixbuf) {
 642         gtk_object_set(GTK_OBJECT (knot->item), "pixbuf", knot->pixbuf, NULL);
 643     }
 644
 645     sp_knot_set_ctrl_state(knot);
 646 }
 647
 648 /**
 649  * Set knot control state (dragging/mouseover/normal).
 650  */
 651 static void sp_knot_set_ctrl_state(SPKnot *knot)
 652 {
 653     if (knot->flags & SP_KNOT_DRAGGING) {
 654         gtk_object_set(GTK_OBJECT (knot->item),
 655                        "fill_color",
 656                        knot->fill[SP_KNOT_STATE_DRAGGING],
 657                        NULL);
 658         gtk_object_set(GTK_OBJECT (knot->item),
 659                        "stroke_color",
 660                        knot->stroke[SP_KNOT_STATE_DRAGGING],
 661                        NULL);
 662     } else if (knot->flags & SP_KNOT_MOUSEOVER) {
 663         gtk_object_set(GTK_OBJECT(knot->item),
 664                        "fill_color",
 665                        knot->fill[SP_KNOT_STATE_MOUSEOVER],
 666                        NULL);
 667         gtk_object_set(GTK_OBJECT(knot->item),
 668                        "stroke_color",
 669                        knot->stroke[SP_KNOT_STATE_MOUSEOVER],
 670                        NULL);
 671     } else {
 672         gtk_object_set(GTK_OBJECT(knot->item),
 673                        "fill_color",
 674                         knot->fill[SP_KNOT_STATE_NORMAL],
 675                        NULL);
 676         gtk_object_set(GTK_OBJECT(knot->item),
 677                        "stroke_color",
 678                        knot->stroke[SP_KNOT_STATE_NORMAL],
 679                        NULL);
 680     }
 681 }
 682
 683
 684
 685 /*
 686   Local Variables:
 687   mode:c++
 688   c-file-style:"stroustrup"
 689   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 690   indent-tabs-mode:nil
 691   fill-column:99
 692   End:
 693 */
 694 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :