To echo what Hugh and Jenna said, if I'm understnading you correctly,
you're making this more complicated than it needs to be.
You're talking about the visibility of methods and instance variables,
and there's no scoping issues to worry about there -- instance
variables and methods are *all* available *everywhere* in an object's
methods, no matter where and when they're defined. That's true in
Ruby in general -- no special Shoes magic.
The extreme simplicity of that is one reason Shoes folk tend to go
straight to instance variables and to define all their methods inside
the Shoes.app block, at least for very simple apps; as long as you do
everything within your Shoes.app do...end block, you can treat
instance variables pretty much as if they were globals and methods as
if they were top-level functions.
But as Jenna said, it is indeed possible to play with blocks using
pure Ruby, and it's one of the most fun things about Ruby. It's just
that that is not necessary to explain the visibility issues you were
talking about.
