Function add_timeout3

pub fn add_timeout3<F>(tm: f64, cb: F) -> *mut ()
where
    F: FnMut(*mut ()) + 'static,

Available on crate feature dep_fltk only.

Adds a one-shot timeout callback. The timeout duration tm is indicated in seconds This function returns a handle that can be use for future interaction with the timeout Example:

use fltk::{prelude::*, *};
fn main() {
    let callback = |_handle| {
        println!("FIRED");
    };

    let app = app::App::default();
    let mut wind = window::Window::new(100, 100, 400, 300, "");
    wind.show();
    let _handle = app::add_timeout3(1.0, callback);
    app.run().unwrap();
}