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