(defun do-local-menu ()
  (if (get-window-with-predicate (lambda (w) (> (buffer-local-value 'local-menu-bar (window-buffer w)) 0)))
      (show-menu) (hide-menu)))
(defun hide-menu () (modify-frame-parameters nil `((menu-bar-lines . 0))))
(defun show-menu () (modify-frame-parameters nil `((menu-bar-lines . 1))))
(add-hook 'window-configuration-change-hook 'do-local-menu)