+ void set_image (std::shared_ptr<const Image> image);
+ void set_image_and_draw ();
+ void draw (Position<int> inter_position, dcp::Size inter_size);
+ void thread ();
+ void thread_playing ();
+ void request_one_shot ();
+ void check_for_butler_errors ();
+ void ensure_context ();
+ void size_changed (wxSizeEvent const &);