// Stage.displayState
normal
// Stage.displayState = A
normal
onFullScreen called with bFull = true
// Stage.displayState = fullScreen
fullScreen
onFullScreen called with bFull = false
// Stage.displayState = NORMAL
normal
onFullScreen called with bFull = true
// Stage.displayState = FULLSCREEN
fullScreen
onFullScreen called with bFull = false
// Stage.displayState = normal
normal
