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Multi-head Support Overview — Overview of GdkDisplay and GdkScreen
GdkDisplay
GdkScreen
The following code samples demonstrate common usage of the objects described above.
Example 2. Testing the number of screen on the current display
gint num_screen = 0; gchar *displayname = NULL; GdkScreen **screen_list; GdkDisplay *display; gtk_init (&argc, &argv); display = gdk_display_get_default (); num_screen = gdk_display_get_n_screens (display); displayname = gdk_display_get_name (display); if (num_screen <= 1) { printf ("This Xserver (%s) manages only one screen. exiting...\n", displayname); exit (1); } else { printf ("This Xserver (%s) manages %d screens.\n", displayname, num_screen); }
Example 3. Opening a second display
gchar *second_screen_name; GdkDisplay *second_display; GdkScreen *second_screen; GtkWidget *window; gtk_init (&argc, &argv); /* screen2_name needs to be initialized before calling /* gdk_display_new() */ second_display = gdk_display_new (&argc, &argv, second_screen_name); if (second_display) second_screen = gdk_display_get_default_screen (second_display); else { g_print ("Can't open display :\n\t%s\n\n", second_screen_name); exit (1); } /* now GdkScreen can be assigned to GtkWindows */ window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_screen (window, second_screen);
the GDK Object used to represent and manipulate display related data | |
the GDK Object used to represent and query screen related data |
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