From: Mike Austin <noone@...>
Date: 2006-03-12T09:18:44+09:00
Subject: Adding methods to a singleton dynamically

I'm building a view hierarchy from a file, and I would like it to add getter 
methods for every subview created.  For example, I should be able to write:

window.bottom_panel.save_button.left = 20

I played around with singleton classes and define_method, am I close?  I wonder 
if it is illegal to do 'class << self end' within a method - I get the error 
'class definition in method body'

hierarchy.each do |key, value|
   view = Object::const_get( key[1] ).new

   class << self end

   self.class.class_eval do
     define_method( key[1] ) do
       return view
     end
   end
end

hierarchy = {
   [:bottom_panel, :Panel] => {
     [:save_button, :Button] => {}
   }
}


Thanks,
Mike