@FXML
 void loadSelectedPlaylist() {
   Playlist p = (Playlist) playlistsView.getSelectionModel().getSelectedItem();
   if (p == null) return;
   tracksView.setPlaceholder(offlinePlaceHolder);
   Platform.runLater(
       () -> {
         List<Track> tracks = p.getTracks();
         tracksView.getItems().clear();
         for (int i = tracks.size() - 1; i >= 0; i--) {
           tracksView.getItems().add(tracks.get(i));
         }
         if (findTrack) {
           Platform.runLater(
               () -> {
                 tracksView.getSelectionModel().select(currentTrack);
                 tracksView.scrollTo(currentTrack);
                 tracksView.requestFocus();
                 findTrack = false;
               });
         } else {
           if (tracksView.getItems().size() > 0) {
             tracksView.scrollTo(0);
           }
         }
       });
 }
 void addToPlaylist(List<File> files, Playlist p) {
   if (interfaceDisabled) return;
   new Thread(
           () -> {
             setInterfaceDisabled(true);
             int total = files.size();
             AtomicInteger current = new AtomicInteger(0);
             Cache.pushToPlaylist(
                 files,
                 p,
                 (Track t) -> {
                   Platform.runLater(
                       () -> {
                         infoLabel.setText(
                             String.format(
                                 res.getString("processed"),
                                 current.incrementAndGet(),
                                 total,
                                 t.getTitle()));
                         if (p == getSelectedPlaylist()) {
                           tracksView.getItems().remove(t);
                           tracksView.getItems().add(0, t);
                         }
                       });
                 });
             setInterfaceDisabled(false);
           })
       .start();
   if (p == getSelectedPlaylist()) {
     Platform.runLater(
         () -> {
           loadSelectedPlaylist();
         });
   }
 }
 void playRandom() {
   List<Track> tracks = tracksView.getItems();
   Random random = new Random();
   int size = tracks.size();
   int r = random.nextInt(size - 1);
   tracksView.getSelectionModel().select(r);
   tracksView.scrollTo(tracksView.getSelectionModel().getSelectedIndex());
   Track nextTrack = (Track) tracksView.getSelectionModel().getSelectedItem();
   playTrack(nextTrack);
 }
 void playNext() {
   List<Track> tracks = tracksView.getItems();
   int selected = tracksView.getSelectionModel().getSelectedIndex();
   int next = selected + 1;
   if (next >= tracks.size()) {
     next = 0;
   }
   tracksView.getSelectionModel().select(next);
   tracksView.scrollTo(tracksView.getSelectionModel().getSelectedIndex());
   Track nextTrack = (Track) tracksView.getSelectionModel().getSelectedItem();
   playTrack(nextTrack);
 }