RFR: 8091673: Public focus traversal API for use in custom controls [v6]

[John Hendrikx]

On Tue, 29 Oct 2024 21:40:45 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

> > Also something that just occurred to me, but perhaps I'm late to the party; with the current API being on `Node` you could call `requestFocusTraversal` on basically any `Node`, even one that is currently not focused. I'm not sure if this is intentional or that the API should perhaps only work from the current focused node.
> 
> I saw this already in the previous PR and thought it's intentional. Even with this method being outside of `Node`, it takes a `Node` argument, which is arbitrary too. If you want to limit it, you'll have to throw or no-op on an unfocused node. I don't think that's necessary.

Well, the API could be on `Scene`, in which case you just call `Scene#requestFocusTraversal(Direction)`, as `Scene` knows what the focused node is.

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PR Comment: https://git.openjdk.org/jfx/pull/1604#issuecomment-2445392199