void remove_screen_clicked ();
std::list<std::pair<wxTreeItemId, boost::shared_ptr<Cinema> > > selected_cinemas () const;
std::list<std::pair<wxTreeItemId, boost::shared_ptr<Screen> > > selected_screens () const;
void remove_screen_clicked ();
std::list<std::pair<wxTreeItemId, boost::shared_ptr<Cinema> > > selected_cinemas () const;
std::list<std::pair<wxTreeItemId, boost::shared_ptr<Screen> > > selected_screens () const;