Banshee.Audiobook.AudiobookLibrarySource.OnPlaybackSourceChanged C# (CSharp) Method

        private void OnPlaybackSourceChanged (object o, EventArgs args)
        {
            if (ServiceManager.PlaybackController.Source == this) {
                PlaybackSource.Book = PlaybackSource.Book ?? ActiveBook;
            } else {
                PlaybackSource.Book = null;
            }

            Actions.UpdateActions ();
        }