Function text_loading_animation::show_loading_animation

pub fn show_loading_animation(
    from: usize, 
    to: usize, 
    target: Destination, 
    progress_fn: &dyn Fn() -> usize, 
    fn_kind: ProgressFnKind
)

Displays a loading animation on stdout. From and To are both values that are not necessarily percent. They describe to problem range, e.g. copy files 1000 to 2000.

One must provide a function that returns the progress in percent at any given time.