void playPrevious() {
if (playStack.size() < 2) return;
System.out.println("------------");
for (PlaylistAndTrack pnt : playStack) {
System.out.println(pnt.track.getTitle());
}
playStack.removeFirst();
PlaylistAndTrack prevPlaylistAndTrack = playStack.removeFirst();
playlistsView.getSelectionModel().select(prevPlaylistAndTrack.playlist);
tracksView.getSelectionModel().select(prevPlaylistAndTrack.track);
tracksView.scrollTo(tracksView.getSelectionModel().getSelectedIndex());
playTrack(prevPlaylistAndTrack.track);
}
void pushToPlayStack(Playlist p, Track t) {
if (playStack.size() > 10000) {
playStack.removeLast();
}
playStack.push(new PlaylistAndTrack(p, t));
}