[External] : Re: Proposal: Focus Traversal API

[John Hendrikx]

On 24/09/2024 22:29, Martin Fox wrote:
> This proposal should give some quick background on how traversal key 
> events are handled, specifically that controls should let the key 
> events bubble up to the Scene to invoke traversal. And if the 
> traversal keys are always going to be consumed by the Scene that 
> should also be mentioned.
>
> There’s been a few comments suggesting the traversal key events should 
> not be consumed if the focusOwner doesn’t change.

Almost all controls that do their own focus traversal handling do so 
because they may get stuck in a ScrollPane which consumes keys without 
having the focus.  If this is fixed, keys can just bubble up to the 
Scene for handling.  See https://bugs.openjdk.org/browse/JDK-8340852

> Unfortunately that would break Popups which have an, um, interesting 
> event architecture.

If keys bubble up to Scene, as they should in most cases, then there is 
no further bubbling anyway, so consumed or unconsumed would be irrelevant.

--John