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From: Jeff Higgins <jeff@invalid.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: Scrollable Popup Menu Keyboard Navigation
Date: Fri, 8 Apr 2016 15:27:29 -0000 (UTC)
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On Fri, 08 Apr 2016 04:29:55 -0700, Eric Douglas wrote:

> On Thursday, April 7, 2016 at 8:16:04 PM UTC-4, Jeff Higgins wrote:
>> Have you looked at How to Use Key Bindings in the Java Tutorials?
> 
> Was that part not clear?  The key map is the key bindings.  I said I
> wrote the maps to make page-up and page-down work.  I'm just wondering
> if I'm missing something.  Why do I have to manually write logic for all
> other navigation keys but I didn't write anything for up and down arrow
> keys and those work?

Your entire original post was somewhat unclear, which may explain the
lack of responses other than mine - which you've dismissed. The use case
for a scrollable pop-up menu is, for me, unclear - but there seems to be
quite a bit of activity around it on the WWW. Searching "java+scrollable
+pop-up+menu" I find quite a few examples - none of which involve a 
custom layout manager.