Lazy_load: move to utils module and make it public.

hammond-gtk/src/widgets/episode.rs

@@ -14,6 +14,7 @@ use hammond_data::utils::get_download_folder;
 
 use app::Action;
 use manager;
+use utils::lazy_load;
 use widgets::episode_states::*;
 
 use std::cell::RefCell;
@@ -392,22 +393,3 @@ pub fn episodes_listbox(pd: Arc<Podcast>, sender: Sender<Action>) -> Result<gtk:
 
     Ok(list)
 }
-
-use gtk::{IsA, Widget};
-
-fn lazy_load<T, C, F, W>(data: T, container: C, mut contructor: F)
-where
-    T: IntoIterator + 'static,
-    T::Item: 'static,
-    C: ContainerExt + 'static,
-    F: FnMut(T::Item) -> W + 'static,
-    W: IsA<Widget>,
-{
-    let mut data = data.into_iter();
-    gtk::idle_add(move || {
-        data.next()
-            .map(|x| container.add(&contructor(x)))
-            .map(|_| glib::Continue(true))
-            .unwrap_or(glib::Continue(false))
-    });
-}