RFR: 8350149: VBox ignores bias of child controls when fillWidth is set to false [v4]

[John Hendrikx]

On Mon, 24 Mar 2025 17:55:50 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> I think you are onto something here.  It almost feels like we shouldn't be doing ceil/floor at all, rounding to the closest pixel instead.
>
> This would be a much larger change, though. Perhaps something to consider for a future discussion.

@kevinrushforth Yes, I wasn't intending to do anything about this in this change as it is unrelated.  I understand why `ceil` is used; FX distinguishes between sizes and spaces, where sizes are part of some visual part of a control, and spaces are non-control areas.  Spaces are generally ceil'd, so that even the thinnest control or border would show up as 1 pixel, while positions and spaces are just rounded.  Still, a border that would end up being 0.0001 pixels wide probably is still best hidden completely.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1723#discussion_r2010943657