src/fullscreen.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  *
   5  * Author: John Ellis
   6  *
   7  * This software is released under the GNU General Public License (GNU GPL).
   8  * Please read the included file COPYING for more information.
   9  * This software comes with no warranty of any kind, use at your own risk!
  10  */
  11
  12
  13 #include "main.h"
  14 #include "fullscreen.h"
  15
  16 #include "image.h"
  17 #include "ui_fileops.h"
  18 #include "ui_menu.h"
  19 #include "ui_misc.h"
  20
  21
  22 enum {
  23         FULLSCREEN_CURSOR_HIDDEN = 1 << 0,
  24         FULLSCREEN_CURSOR_NORMAL = 1 << 1,
  25         FULLSCREEN_CURSOR_BUSY   = 1 << 2
  26 };
  27
  28
  29 /*
  30  *----------------------------------------------------------------------------
  31  * full screen functions
  32  *----------------------------------------------------------------------------
  33  */
  34
  35 static void clear_mouse_cursor(GtkWidget *widget, gint state)
  36 {
  37         if (!widget->window) return;
  38
  39         if (state & FULLSCREEN_CURSOR_BUSY)
  40                 {
  41                 GdkCursor *cursor;
  42
  43                 cursor = gdk_cursor_new(GDK_WATCH);
  44                 gdk_window_set_cursor (widget->window, cursor);
  45                 gdk_cursor_unref(cursor);
  46                 }
  47         else if (state & FULLSCREEN_CURSOR_NORMAL)
  48                 {
  49                 gdk_window_set_cursor (widget->window, NULL);
  50                 }
  51         else
  52                 {
  53                 GdkCursor *cursor;
  54                 GdkPixmap *p;
  55
  56                 p = gdk_bitmap_create_from_data(widget->window, "\0\0\0", 1, 1);
  57
  58                 cursor = gdk_cursor_new_from_pixmap(p, p,
  59                                                     &widget->style->fg[GTK_STATE_ACTIVE],
  60                                                     &widget->style->bg[GTK_STATE_ACTIVE],
  61                                                     0, 0);
  62
  63                 gdk_window_set_cursor (widget->window, cursor);
  64
  65                 gdk_cursor_unref(cursor);
  66                 g_object_unref(p);
  67                 }
  68 }
  69
  70 static gint fullscreen_hide_mouse_cb(gpointer data)
  71 {
  72         FullScreenData *fs = data;
  73
  74         if (fs->hide_mouse_id == -1) return FALSE;
  75
  76         fs->cursor_state &= ~FULLSCREEN_CURSOR_NORMAL;
  77         if (!(fs->cursor_state & FULLSCREEN_CURSOR_BUSY)) clear_mouse_cursor(fs->window, fs->cursor_state);
  78
  79         fs->hide_mouse_id = -1;
  80         return FALSE;
  81 }
  82
  83 static void fullscreen_hide_mouse_disable(FullScreenData *fs)
  84 {
  85         if (fs->hide_mouse_id != -1)
  86                 {
  87                 g_source_remove(fs->hide_mouse_id);
  88                 fs->hide_mouse_id = -1;
  89                 }
  90 }
  91
  92 static void fullscreen_hide_mouse_reset(FullScreenData *fs)
  93 {
  94         fullscreen_hide_mouse_disable(fs);
  95         fs->hide_mouse_id = g_timeout_add(FULL_SCREEN_HIDE_MOUSE_DELAY, fullscreen_hide_mouse_cb, fs);
  96 }
  97
  98 static gint fullscreen_mouse_moved(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
  99 {
 100         FullScreenData *fs = data;
 101
 102         if (!(fs->cursor_state & FULLSCREEN_CURSOR_NORMAL))
 103                 {
 104                 fs->cursor_state |= FULLSCREEN_CURSOR_NORMAL;
 105                 if (!(fs->cursor_state & FULLSCREEN_CURSOR_BUSY)) clear_mouse_cursor(fs->window, fs->cursor_state);
 106                 }
 107         fullscreen_hide_mouse_reset(fs);
 108
 109         return FALSE;
 110 }
 111
 112 static void fullscreen_busy_mouse_disable(FullScreenData *fs)
 113 {
 114         if (fs->busy_mouse_id != -1)
 115                 {
 116                 g_source_remove(fs->busy_mouse_id);
 117                 fs->busy_mouse_id = -1;
 118                 }
 119 }
 120
 121 static void fullscreen_mouse_set_busy(FullScreenData *fs, gint busy)
 122 {
 123         fullscreen_busy_mouse_disable(fs);
 124
 125         if ((fs->cursor_state & FULLSCREEN_CURSOR_BUSY) == (busy)) return;
 126
 127         if (busy)
 128                 {
 129                 fs->cursor_state |= FULLSCREEN_CURSOR_BUSY;
 130                 }
 131         else
 132                 {
 133                 fs->cursor_state &= ~FULLSCREEN_CURSOR_BUSY;
 134                 }
 135
 136         clear_mouse_cursor(fs->window, fs->cursor_state);
 137 }
 138
 139 static gboolean fullscreen_mouse_set_busy_cb(gpointer data)
 140 {
 141         FullScreenData *fs = data;
 142
 143         fs->busy_mouse_id = -1;
 144         fullscreen_mouse_set_busy(fs, TRUE);
 145         return FALSE;
 146 }
 147
 148 static void fullscreen_mouse_set_busy_idle(FullScreenData *fs)
 149 {
 150         if (fs->busy_mouse_id == -1)
 151                 {
 152                 fs->busy_mouse_id = g_timeout_add(FULL_SCREEN_BUSY_MOUSE_DELAY,
 153                                                   fullscreen_mouse_set_busy_cb, fs);
 154                 }
 155 }
 156
 157 static void fullscreen_image_update_cb(ImageWindow *imd, gpointer data)
 158 {
 159         FullScreenData *fs = data;
 160
 161         if (fs->imd->il &&
 162             fs->imd->il->pixbuf != image_get_pixbuf(fs->imd))
 163                 {
 164                 fullscreen_mouse_set_busy_idle(fs);
 165                 }
 166 }
 167
 168 static void fullscreen_image_complete_cb(ImageWindow *imd, gint preload, gpointer data)
 169 {
 170         FullScreenData *fs = data;
 171
 172         if (!preload) fullscreen_mouse_set_busy(fs, FALSE);
 173 }
 174
 175 #define XSCREENSAVER_BINARY     "xscreensaver-command"
 176 #define XSCREENSAVER_COMMAND    "xscreensaver-command -deactivate >&- 2>&- &"
 177
 178 static void fullscreen_saver_deactivate(void)
 179 {
 180         static gint checked = FALSE;
 181         static gint found = FALSE;
 182
 183         if (!checked)
 184                 {
 185                 checked = TRUE;
 186                 found = file_in_path(XSCREENSAVER_BINARY);
 187                 }
 188
 189         if (found)
 190                 {
 191                 system (XSCREENSAVER_COMMAND);
 192                 }
 193 }
 194
 195 static gboolean fullscreen_saver_block_cb(gpointer data)
 196 {
 197         if (fullscreen_disable_saver)
 198                 {
 199                 fullscreen_saver_deactivate();
 200                 }
 201
 202         return TRUE;
 203 }
 204
 205 static gint fullscreen_delete_cb(GtkWidget *widget, GdkEventAny *event, gpointer data)
 206 {
 207         FullScreenData *fs = data;
 208
 209         fullscreen_stop(fs);
 210         return TRUE;
 211 }
 212
 213 FullScreenData *fullscreen_start(GtkWidget *window, ImageWindow *imd,
 214                                  void (*stop_func)(FullScreenData *, gpointer), gpointer stop_data)
 215 {
 216         FullScreenData *fs;
 217         GdkScreen *screen;
 218         gint same;
 219         gint x, y;
 220         gint w, h;
 221         GdkGeometry geometry;
 222
 223         if (!window || !imd) return NULL;
 224
 225         fs = g_new0(FullScreenData, 1);
 226
 227         fs->hide_mouse_id = -1;
 228         fs->busy_mouse_id = -1;
 229         fs->cursor_state = FULLSCREEN_CURSOR_HIDDEN;
 230
 231         fs->normal_window = window;
 232         fs->normal_imd = imd;
 233
 234         fs->stop_func = stop_func;
 235         fs->stop_data = stop_data;
 236
 237         if (debug) printf("full screen requests screen %d\n", fullscreen_screen);
 238         fullscreen_prefs_get_geometry(fullscreen_screen, window, &x, &y, &w, &h,
 239                                       &screen, &same);
 240
 241         fs->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 242         gtk_window_set_wmclass(GTK_WINDOW(fs->window), "fullscreen", GQ_WMCLASS);
 243
 244         /* this requests no decorations, if you still have them complain to the window manager author(s) */
 245         gtk_window_set_decorated(GTK_WINDOW(fs->window), FALSE);
 246
 247         if (fullscreen_screen < 0)
 248                 {
 249                 /* If we want control of the window size and position this is not what we want.
 250                  * Geeqie needs control of which monitor(s) to use for full screen.
 251                  */
 252                 gtk_window_fullscreen(GTK_WINDOW(fs->window));
 253                 }
 254         else if (fullscreen_above)
 255                 {
 256                 /* request to be above other windows */
 257                 gtk_window_set_keep_above(GTK_WINDOW(fs->window), TRUE);
 258                 }
 259
 260         gtk_window_set_resizable(GTK_WINDOW(fs->window), FALSE);
 261
 262         gtk_window_set_screen(GTK_WINDOW(fs->window), screen);
 263         gtk_container_set_border_width(GTK_CONTAINER(fs->window), 0);
 264         g_signal_connect(G_OBJECT(fs->window), "delete_event",
 265                          G_CALLBACK(fullscreen_delete_cb), fs);
 266
 267         {
 268         gchar *title = g_strdup_printf("%s - %s", _("Full screen"), GQ_APPNAME);
 269         gtk_window_set_title(GTK_WINDOW(fs->window), title);
 270         g_free(title);
 271         }
 272
 273         geometry.min_width = w;
 274         geometry.min_height = h;
 275         geometry.max_width = w;
 276         geometry.max_height = h;
 277         geometry.base_width = w;
 278         geometry.base_height = h;
 279         geometry.win_gravity = GDK_GRAVITY_STATIC;
 280         /* By setting USER_POS and USER_SIZE, most window managers will
 281          * not request positioning of the full screen window (for example twm).
 282          *
 283          * In addition, setting gravity to STATIC will result in the
 284          * decorations of twm to not effect the requested window position,
 285          * the decorations will simply be off screen, except in multi monitor setups :-/
 286          */
 287         gtk_window_set_geometry_hints(GTK_WINDOW(fs->window), fs->window, &geometry,
 288                                       GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE | GDK_HINT_BASE_SIZE |
 289                                       GDK_HINT_WIN_GRAVITY |
 290                                       GDK_HINT_USER_POS);
 291
 292         gtk_window_set_default_size(GTK_WINDOW(fs->window), w, h);
 293         gtk_window_move(GTK_WINDOW(fs->window), x, y);
 294
 295         fs->imd = image_new(FALSE);
 296
 297         gtk_container_add(GTK_CONTAINER(fs->window), fs->imd->widget);
 298
 299         if (user_specified_window_background)
 300                 {
 301                 image_background_set_color(fs->imd, &window_background_color);
 302                 }
 303
 304         image_set_delay_flip(fs->imd, fullscreen_clean_flip);
 305         image_auto_refresh(fs->imd, fs->normal_imd->auto_refresh_interval);
 306
 307         if (fullscreen_clean_flip)
 308                 {
 309                 image_set_update_func(fs->imd, fullscreen_image_update_cb, fs);
 310                 image_set_complete_func(fs->imd, fullscreen_image_complete_cb, fs);
 311                 }
 312
 313         gtk_widget_show(fs->imd->widget);
 314
 315         image_change_from_image(fs->imd, fs->normal_imd);
 316
 317         gtk_widget_show(fs->window);
 318
 319         /* for hiding the mouse */
 320         g_signal_connect(G_OBJECT(fs->imd->pr), "motion_notify_event",
 321                            G_CALLBACK(fullscreen_mouse_moved), fs);
 322         clear_mouse_cursor(fs->window, fs->cursor_state);
 323
 324         /* set timer to block screen saver */
 325         fs->saver_block_id = g_timeout_add(60 * 1000, fullscreen_saver_block_cb, fs);
 326
 327         /* hide normal window
 328          * FIXME: properly restore this window on show
 329          */
 330 #ifdef HIDE_WINDOW_IN_FULLSCREEN
 331         gtk_widget_hide(fs->normal_window);
 332 #endif
 333         image_change_fd(fs->normal_imd, NULL, image_zoom_get(fs->normal_imd));
 334
 335         return fs;
 336 }
 337
 338 void fullscreen_stop(FullScreenData *fs)
 339 {
 340         if (!fs) return;
 341
 342         g_source_remove(fs->saver_block_id);
 343
 344         fullscreen_hide_mouse_disable(fs);
 345         fullscreen_busy_mouse_disable(fs);
 346         gdk_keyboard_ungrab(GDK_CURRENT_TIME);
 347
 348         image_change_from_image(fs->normal_imd, fs->imd);
 349 #ifdef HIDE_WINDOW_IN_FULLSCREEN
 350         gtk_widget_show(fs->normal_window);
 351 #endif
 352         if (fs->stop_func) fs->stop_func(fs, fs->stop_data);
 353
 354         gtk_widget_destroy(fs->window);
 355
 356         g_free(fs);
 357 }
 358
 359
 360 /*
 361  *----------------------------------------------------------------------------
 362  * full screen preferences and utils
 363  *----------------------------------------------------------------------------
 364  */
 365
 366 GList *fullscreen_prefs_list(void)
 367 {
 368         GList *list = NULL;
 369         GdkDisplay *display;
 370         gint number;
 371         gint i;
 372
 373         display = gdk_display_get_default();
 374         number = gdk_display_get_n_screens(display);
 375
 376         for (i = 0; i < number ; i++)
 377                 {
 378                 GdkScreen *screen;
 379                 gint monitors;
 380                 gint j;
 381
 382                 screen = gdk_display_get_screen(display, i);
 383                 monitors = gdk_screen_get_n_monitors(screen);
 384
 385                 for (j = -1; j < monitors; j++)
 386                         {
 387                         ScreenData *sd;
 388                         GdkRectangle rect;
 389                         gchar *name;
 390                         gchar *subname;
 391
 392                         name = gdk_screen_make_display_name(screen);
 393
 394                         if (j < 0)
 395                                 {
 396                                 rect.x = 0;
 397                                 rect.y = 0;
 398                                 rect.width = gdk_screen_get_width(screen);
 399                                 rect.height = gdk_screen_get_height(screen);
 400                                 subname = g_strdup(_("Full size"));
 401                                 }
 402                         else
 403                                 {
 404                                 gdk_screen_get_monitor_geometry(screen, j, &rect);
 405                                 subname = g_strdup_printf("%s %d", _("Monitor"), j + 1);
 406                                 }
 407
 408                         sd = g_new0(ScreenData, 1);
 409                         sd->number = (i+1) * 100 + j + 1;
 410                         sd->description = g_strdup_printf("%s %s, %s", _("Screen"), name, subname);
 411                         sd->x = rect.x;
 412                         sd->y = rect.y;
 413                         sd->width = rect.width;
 414                         sd->height = rect.height;
 415
 416                         if (debug) printf("Screen %d %30s %4d,%4d (%4dx%4d)\n",
 417                                           sd->number, sd->description, sd->x, sd->y, sd->width, sd->height);
 418
 419                         list = g_list_append(list, sd);
 420
 421                         g_free(name);
 422                         g_free(subname);
 423                         }
 424                 }
 425
 426         return list;
 427 }
 428
 429 void fullscreen_prefs_list_free(GList *list)
 430 {
 431         GList *work;
 432
 433         work = list;
 434         while (work)
 435                 {
 436                 ScreenData *sd = work->data;
 437                 work = work->next;
 438
 439                 g_free(sd->description);
 440                 g_free(sd);
 441                 }
 442
 443         g_list_free(list);
 444 }
 445
 446 ScreenData *fullscreen_prefs_list_find(GList *list, gint screen)
 447 {
 448         GList *work;
 449
 450         work = list;
 451         while (work)
 452                 {
 453                 ScreenData *sd = work->data;
 454                 work = work->next;
 455
 456                 if (sd->number == screen) return sd;
 457                 }
 458
 459         return NULL;
 460 }
 461
 462 /* screen is interpreted as such:
 463  *  -1  window manager determines size and position, fallback is (1) active monitor
 464  *   0  full size of screen containing widget
 465  *   1  size of monitor containing widget
 466  * 100  full size of screen 1 (screen, monitor counts start at 1)
 467  * 101  size of monitor 1 on screen 1
 468  * 203  size of monitor 3 on screen 2
 469  * returns:
 470  * dest_screen: screen to place widget [use gtk_window_set_screen()]
 471  * same_region: the returned region will overlap the current location of widget.
 472  */
 473 void fullscreen_prefs_get_geometry(gint screen, GtkWidget *widget, gint *x, gint *y, gint *width, gint *height,
 474                                    GdkScreen **dest_screen, gint *same_region)
 475 {
 476         GList *list;
 477         ScreenData *sd;
 478
 479         list = fullscreen_prefs_list();
 480         if (screen >= 100)
 481                 {
 482                 sd = fullscreen_prefs_list_find(list, screen);
 483                 }
 484         else
 485                 {
 486                 sd = NULL;
 487                 if (screen < 0) screen = 1;
 488                 }
 489
 490         if (sd)
 491                 {
 492                 GdkDisplay *display;
 493                 GdkScreen *screen;
 494                 gint n;
 495
 496                 display = gdk_display_get_default();
 497                 n = sd->number / 100 - 1;
 498                 if (n >= 0 && n < gdk_display_get_n_screens(display))
 499                         {
 500                         screen = gdk_display_get_screen(display, n);
 501                         }
 502                 else
 503                         {
 504                         screen = gdk_display_get_default_screen(display);
 505                         }
 506
 507                 if (x) *x = sd->x;
 508                 if (y) *y = sd->y;
 509                 if (width) *width = sd->width;
 510                 if (height) *height = sd->height;
 511
 512                 if (dest_screen) *dest_screen = screen;
 513                 if (same_region) *same_region = (!widget || !widget->window ||
 514                                         (screen == gtk_widget_get_screen(widget) &&
 515                                         (sd->number%100 == 0 ||
 516                                          sd->number%100 == gdk_screen_get_monitor_at_window(screen, widget->window)+1)));
 517
 518                 }
 519         else if (screen != 1 || !widget || !widget->window)
 520                 {
 521                 GdkScreen *screen;
 522
 523                 if (widget)
 524                         {
 525                         screen = gtk_widget_get_screen(widget);
 526                         }
 527                 else
 528                         {
 529                         screen = gdk_screen_get_default();
 530                         }
 531
 532                 if (x) *x = 0;
 533                 if (y) *y = 0;
 534                 if (width) *width = gdk_screen_get_width(screen);
 535                 if (height) *height = gdk_screen_get_height(screen);
 536
 537                 if (dest_screen) *dest_screen = screen;
 538                 if (same_region) *same_region = TRUE;
 539                 }
 540         else
 541                 {
 542                 GdkScreen *screen;
 543                 gint monitor;
 544                 GdkRectangle rect;
 545
 546                 screen = gtk_widget_get_screen(widget);
 547                 monitor = gdk_screen_get_monitor_at_window(screen, widget->window);
 548
 549                 gdk_screen_get_monitor_geometry(screen, monitor, &rect);
 550
 551                 if (x) *x = rect.x;
 552                 if (y) *y = rect.y;
 553                 if (width) *width = rect.width;
 554                 if (height) *height = rect.height;
 555
 556                 if (dest_screen) *dest_screen = screen;
 557                 if (same_region) *same_region = TRUE;
 558                 }
 559
 560         fullscreen_prefs_list_free(list);
 561 }
 562
 563 gint fullscreen_prefs_find_screen_for_widget(GtkWidget *widget)
 564 {
 565         GdkScreen *screen;
 566         gint monitor;
 567         gint n;
 568
 569         if (!widget || !widget->window) return 0;
 570
 571         screen = gtk_widget_get_screen(widget);
 572         monitor = gdk_screen_get_monitor_at_window(screen, widget->window);
 573
 574         n = (gdk_screen_get_number(screen)+1) * 100 + monitor + 1;
 575
 576         if (debug || TRUE) printf("Screen appears to be %d\n", n);
 577
 578         return n;
 579 }
 580
 581 enum {
 582         FS_MENU_COLUMN_NAME = 0,
 583         FS_MENU_COLUMN_VALUE
 584 };
 585
 586 #define BUTTON_ABOVE_KEY  "button_above"
 587
 588 static void fullscreen_prefs_selection_cb(GtkWidget *combo, gpointer data)
 589 {
 590         gint *value = data;
 591         GtkTreeModel *store;
 592         GtkTreeIter iter;
 593         GtkWidget *button;
 594
 595         if (!value) return;
 596
 597         store = gtk_combo_box_get_model(GTK_COMBO_BOX(combo));
 598         if (!gtk_combo_box_get_active_iter(GTK_COMBO_BOX(combo), &iter)) return;
 599         gtk_tree_model_get(store, &iter, FS_MENU_COLUMN_VALUE, value, -1);
 600
 601         button = g_object_get_data(G_OBJECT(combo), BUTTON_ABOVE_KEY);
 602         if (button)
 603                 {
 604                 gtk_widget_set_sensitive(button, *value != -1);
 605                 }
 606 }
 607
 608 static void fullscreen_prefs_selection_add(GtkListStore *store, const gchar *text, gint value)
 609 {
 610         GtkTreeIter iter;
 611
 612         gtk_list_store_append(store, &iter);
 613         gtk_list_store_set(store, &iter, FS_MENU_COLUMN_NAME, text,
 614                                          FS_MENU_COLUMN_VALUE, value, -1);
 615 }
 616
 617 GtkWidget *fullscreen_prefs_selection_new(const gchar *text, gint *screen_value, gint *above_value)
 618 {
 619         GtkWidget *vbox;
 620         GtkWidget *hbox;
 621         GtkWidget *combo;
 622         GtkListStore *store;
 623         GtkCellRenderer *renderer;
 624         GtkWidget *button = NULL;
 625         GList *list;
 626         GList *work;
 627         gint current = 0;
 628         gint n;
 629
 630         if (!screen_value) return NULL;
 631
 632         vbox = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 633         hbox = pref_box_new(vbox, FALSE, GTK_ORIENTATION_HORIZONTAL, PREF_PAD_SPACE);
 634         if (text) pref_label_new(hbox, text);
 635
 636         store = gtk_list_store_new(2, G_TYPE_STRING, G_TYPE_INT);
 637         combo = gtk_combo_box_new_with_model(GTK_TREE_MODEL(store));
 638         g_object_unref(store);
 639
 640         renderer = gtk_cell_renderer_text_new();
 641         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, TRUE);
 642         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer,
 643                                        "text", FS_MENU_COLUMN_NAME, NULL);
 644
 645         if (above_value)
 646                 {
 647                 button = pref_checkbox_new_int(vbox, _("Stay above other windows"),
 648                                                *above_value, above_value);
 649                 gtk_widget_set_sensitive(button, *screen_value != -1);
 650
 651                 g_object_set_data(G_OBJECT(combo), BUTTON_ABOVE_KEY, button);
 652                 }
 653
 654         fullscreen_prefs_selection_add(store, _("Determined by Window Manager"), -1);
 655         fullscreen_prefs_selection_add(store, _("Active screen"), 0);
 656         if (*screen_value == 0) current = 1;
 657         fullscreen_prefs_selection_add(store, _("Active monitor"), 1);
 658         if (*screen_value == 1) current = 2;
 659
 660         n = 3;
 661         list = fullscreen_prefs_list();
 662         work = list;
 663         while (work)
 664                 {
 665                 ScreenData *sd = work->data;
 666
 667                 fullscreen_prefs_selection_add(store, sd->description, sd->number);
 668                 if (*screen_value == sd->number) current = n;
 669
 670                 work = work->next;
 671                 n++;
 672                 }
 673         fullscreen_prefs_list_free(list);
 674
 675         gtk_combo_box_set_active(GTK_COMBO_BOX(combo), current);
 676
 677         gtk_box_pack_start(GTK_BOX(hbox), combo, FALSE, FALSE, 0);
 678         gtk_widget_show(combo);
 679
 680         g_signal_connect(G_OBJECT(combo), "changed",
 681                          G_CALLBACK(fullscreen_prefs_selection_cb), screen_value);
 682
 683         return vbox;
 684 }
 685