The AWT Focus spec, section Pogrammatic Traversal, states:

  Also note that hiding or disabling the focus owner, directly or indirectly 
  via an ancestor, or making the focus owner non-displayable or non-focusable,
  initiates an automatic, forward focus traversal. While hiding any ancestor,
  lightweight or heavyweight, will always indirectly hide its children, only
  disabling a heavyweight ancestor will disable its children. Thus, disabling 
  a lightweight ancestor of the focus owner does not automatically initiate a
  focus traversal.

There are several questions about this section:

- It's unclear why disabling the focus owner initiates a traversal, because
  according to the spec, "A disabled Component may be the focus owner" (see 
  section Requesting Focus).

- It states an important difference between disabling a lightweight container
  and disabling a heavyweight one. Is it really true? I couldn't find anything
  about it in the javadoc. However, the Chan/Lee book (2nd Edition) doesn't 
  mention any differences. What's more confusing, this book (p.422) states
  that children of a disabled container will not receive any input events
  yet retain the enabled appearance.

It would be very useful to clarify behavior for enabling/disabling containers 
for all possible scenarios (lightwight/heavyweight ancestors, lightweight/
heavyweight children). I realize this may look like a different issue, but 
the Focus spec is the only place so far that mentions it.

###@###.### 2004-10-01