void gdk_window_set_fullscreen_mode ( GdkWindow* window, GdkFullscreenMode mode )
Specifies whether the
window should span over all monitors (in a multi-head
setup) or only the current monitor when in fullscreen mode.
mode argument is from the
If #GDK_FULLSCREEN_ON_ALL_MONITORS is specified, the fullscreen
span over all monitors from the
On X11, searches through the list of monitors from the
GdkScreen the ones
which delimit the 4 edges of the entire
GdkScreen and will ask the window
manager to span the
window over these monitors.
If the XINERAMA extension is not available or not usable, this function has no effect.
Not all window managers support this, so you can’t rely on the fullscreen window to span over the multiple monitors when #GDK_FULLSCREEN_ON_ALL_MONITORS is specified.
Available since: 3.8