XY_WLABEL
(xy->flags & XY_WLABEL) != 0) <= 0)
xy->flags |= XY_WLABEL;
xy->flags &= ~XY_WLABEL;
(xy->flags & XY_WLABEL) != 0) <= 0)
xy->flags |= XY_WLABEL;
xy->flags &= ~XY_WLABEL;