qt - How to add a QWidget to a QMenuBar? -

i want add qlabel qmenubar. able add qlabel qmenu using qactionwidget, want qlabel sit on qmenubar (as substitute qmenu) @ right end of application. intend add movie qlabel in order simulate loading circle indicate application running. how can add qwidget qmenubar, or there alternative ultimate goal? using qt 5.6 qt designer

a widget can added end of menu-bar qmenubar::setcornerwidget.