pub fn set_idle_grace_period(timeout: Duration)Expand description
Configures the idle grace period.
The grace period starts after the idle timeout expires. During the grace period, the
screen goes black but the displays are not yet disabled and the idle callback (set
with on_idle) is not yet called. This is a purely visual effect to inform the user
that the machine will soon go idle.
The default is 5 seconds.