Function glib::source::idle_add_local_once

pub fn idle_add_local_once<F>(func: F) -> SourceId where
    F: FnOnce() + 'static, 

Adds a closure to be called by the default main loop when it’s idle.

func will be called repeatedly until it returns Continue(false).

The default main loop almost always is the main loop of the main thread. Thus the closure is called on the main thread.

Different to idle_add(), this does not require func to be Send but can only be called from the thread that owns the main context.

This function panics if called from a different thread than the one that owns the main context.

In comparison to idle_add_local(), this only requires func to be FnOnce, and will automatically return Continue(false).