<Swing Dev> RFR: 8253016: Box.Filler components should be unfocusable by default

[Phil Race]

On Mon, 14 Sep 2020 09:30:22 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

> Please review a fix for an issue where it is seen that even though Box.Filler components are invisible components that
> are created by Box methods to return struts and glue, they ( Box.Filler instances) are focusable by default. As a
> consequence, they become members of the implicitly created focus traversal policies, which means that their existence
> as components can be seen by users.  Proposed fix is to make this Filler components unfocusable by default.  All
> automated headful tests and JCK tests are unaffected by these.

Marked as reviewed by prr (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/149