use scrollview in linearlayout for playlist items

this approach is more flexible for future additions, e.g. further callbacks such
as playlist deletion.

src/ui/mod.rs

@@ -1,4 +1,4 @@
+pub mod playlist;
 pub mod queue;
 pub mod search;
 pub mod trackbutton;
-pub mod playlist;

src/ui/playlist.rs

@@ -1,70 +1,81 @@
 use std::sync::{Arc, Mutex};
 
-use cursive::traits::Identifiable;
 use cursive::direction::Orientation;
 use cursive::traits::Boxable;
+use cursive::traits::Identifiable;
 use cursive::views::*;
 use cursive::Cursive;
+use rspotify::spotify::model::playlist::{SimplifiedPlaylist};
 
-use spotify::Spotify;
 use queue::Queue;
+use spotify::Spotify;
 
 pub enum PlaylistEvent {
     Refresh,
 }
 
 pub struct PlaylistView {
-    pub view: Option<Panel<LinearLayout>>,
+    pub view: Option<Panel<BoxView<BoxView<ScrollView<IdView<LinearLayout>>>>>>, // FIXME: wow
     queue: Arc<Mutex<Queue>>,
     spotify: Arc<Spotify>,
 }
 
 impl PlaylistView {
     pub fn new(queue: Arc<Mutex<Queue>>, spotify: Arc<Spotify>) -> PlaylistView {
-        let playlist_overview: IdView<SelectView> = SelectView::new().with_id("playlists_overview");
-        let scrollable = ScrollView::new(playlist_overview).full_width().full_height();
-        let layout = LinearLayout::new(Orientation::Vertical).child(scrollable);
-        let rootpanel = Panel::new(layout).title("Playlists");
+        let playlists = LinearLayout::new(Orientation::Vertical).with_id("playlists");
+        let scrollable = ScrollView::new(playlists).full_width().full_height();
+        let panel = Panel::new(scrollable).title("Playlists");
 
         PlaylistView {
-            view: Some(rootpanel),
+            view: Some(panel),
             queue: queue,
             spotify: spotify,
         }
     }
-    fn clear_playlists(&self, playlist_overview: &mut ViewRef<SelectView>) {
-        playlist_overview.clear();
+    fn clear_playlists(&self, playlists: &mut ViewRef<LinearLayout>) {
+        while playlists.len() > 0 {
+            playlists.remove_child(0);
+        }
     }
 
-    fn show_playlists(&self, playlist_overview: &mut ViewRef<SelectView>) {
-        let playlists = self.spotify.current_user_playlist(50, 0).unwrap().items;
-        for playlist in &playlists {
-            playlist_overview.add_item(playlist.name.clone(), playlist.id.clone());
-        }
-
+    fn create_button(&self, playlist: &SimplifiedPlaylist) -> BoxView<Button> {
         let spotify_ref = self.spotify.clone();
         let queue_ref = self.queue.clone();
-        playlist_overview.set_on_submit(move |_s, id| {
-            let tracks = spotify_ref.user_playlist_tracks(id).unwrap().items;
 
+        // TODO: implement a custom view that displays playlists similar to
+        // TrackButton with more detail, e.g. number of tracks, total duration.
+        let id = playlist.id.clone();
+        let button = Button::new_raw(playlist.name.clone(), move |_s| {
+            let tracks = spotify_ref.user_playlist_tracks(&id).unwrap().items;
             let mut locked_queue = queue_ref.lock().expect("Could not aquire lock");
             for playlist_track in tracks {
                 locked_queue.enqueue(playlist_track.track.clone());
             }
         });
+
+        button
+    }
+
+    fn show_playlists(&self, playlists: &mut ViewRef<LinearLayout>) {
+        let playlists_response = self.spotify.current_user_playlist(50, 0).unwrap().items;
+        for playlist in &playlists_response {
+            let button = self.create_button(playlist);
+            playlists.add_child(button);
+        }
     }
 
     pub fn handle_ev(&self, cursive: &mut Cursive, event: PlaylistEvent) {
-        let view_ref: Option<ViewRef<SelectView>> = cursive.find_id("playlists_overview");
+        let view_ref: Option<ViewRef<LinearLayout>> = cursive.find_id("playlists");
 
-        if let Some(mut playlist_overview) = view_ref {
+        if let Some(mut playlists) = view_ref {
             match event {
                 PlaylistEvent::Refresh => {
-                    self.clear_playlists(&mut playlist_overview);
-                    self.show_playlists(&mut playlist_overview);
+                    // FIXME: do this only once at startup or when requested by
+                    // the user
+                    self.clear_playlists(&mut playlists);
+                    self.show_playlists(&mut playlists);
                 }
             }
         }
     }
 }
-