Focus delegation API

[Andy Goryachev]

> I don't see how these problems are at all related.

I failed to explain it clearly then.  I'll try to write up a more detailed explanation after Thanksgiving.

-andy


From: openjfx-dev <openjfx-dev-retn at openjdk.org> on behalf of Michael Strauß <michaelstrau2 at gmail.com>
Date: Wednesday, November 20, 2024 at 14:42
To:
Cc: openjfx-dev <openjfx-dev at openjdk.org>
Subject: Re: Focus delegation API
I don't see how these problems are at all related.

My proposal solves the focus delegation problem that is inherent with
composite controls, which is not even addressed by the InputMap
proposal.

It also solves an artifact of the event system, namely that key events
are delivered to the focused node, which cannot simultaneously be the
Spinner and its TextField. The ugly hack to make this work is to
duplicate the event entirely, so that if you'd observe Spinner and
listen for key events, you will see duplicated key presses. This is
also not solved in any meaningful way by InputMap.



On Wed, Nov 13, 2024 at 8:33 PM Andy Goryachev
<andy.goryachev at oracle.com> wrote:
>
> I feel this is going in a wrong direction: the root cause of the issues we are observing, in my opinion, is that the top-level Control is fighting for control with the inner control, and the inner control's behaves as if it is a top-level control.
>
> What should happen instead is to provide a way for the top-level Control to disable those aspects of the inner control behavior (event handlers, key bindings) that are not needed anymore, and replace them with the new logic.
> Continuing the Spinner example, it is ok for the TextField (Spinner.editor) to receive events, but the handling of certain key combinations should be disabled and instead bubbled up to the Spinner behavior.
>
> I propose to use the InputMap https://github.com/andy-goryachev-oracle/Test/blob/main/doc/InputMap/InputMapV3.md for this purpose.
>
> -andy
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