#  $Id: overlayitem.icn,v 1.1 2003-05-31 06:09:03 jeffery Exp $

##
#  This class is one "pane" in an {OverlaySet}, which is rather
#  like a {TabSet} except that there are no tabs, and control
#  over which pane is displayed is entirely the affair of the
#  program.
#
#  The components inside have their size and position computed
#  relative to the parent OverlaySet and also inherit the
#  OverlaySet's windowing attributes.
#  Components are added using the {add} method of {Container}.
#
class OverlayItem : Container(
   parent_overlay_set
   )

   method is_hidden()
      return parent_overlay_set.which_one ~=== self
   end

   method is_unhidden()
      return parent_overlay_set.which_one === self
   end

   method set_parent_overlay_set(x)
      return self.parent_overlay_set := x
   end
end