Function gtk::timeout_add_seconds

pub fn timeout_add_seconds<F>(interval: u32, func: F) -> SourceId where
    F: FnMut() -> Continue + 'static, 

Adds a closure to be called by the default main loop at regular intervals with second granularity.

func will be called repeatedly every interval seconds until it returns Continue(false). Precise timing is not guaranteed, the timeout may be delayed by other events.

Similar to glib::timeout_add_seconds but only callable from the main thread and doesn't require Send.