indexing description: "[ Shared access to focus singletons. ]" date: "$Date$" revision: "$Revision$" class EM_SHARED_FOCUS feature -- Access Shared_mouse_focus: EM_MOUSE_FOCUS is -- Mouse focus singleton once create Result ensure shared_mouse_focus_not_void: Result /= Void end Keyboard_focus: EM_KEYBOARD_FOCUS is -- Keyboard focus singleton once create Result ensure keyboard_focus_not_void: Result /= Void end Joystick_focus: EM_JOYSTICK_FOCUS is -- Joystick focus singleton once create Result.make ensure joystick_focus_not_void: Result /= Void end end