RFR: 8313424: JavaFX controls in the title bar (Preview) [v80]

[Kevin Rushforth]

On Wed, 4 Jun 2025 14:48:31 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> Implementation of [`StageStyle.EXTENDED`](https://gist.github.com/mstr2/0befc541ee7297b6db2865cc5e4dbd09).
>
> Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:
> 
>   enable preview feature system properties for tests

I can reproduce at least two of the things you reported with master. What I did to ensure an accurate comparison was to take the modified monkey tester that is included with this PR and removed all references to HeaderBar. The resulting app will run on either the master branch or this PR branch.

With that, I can reproduce the following behaviors:

1. WINDOW_MODAL, iconify (either by checking the box or pressing the button on the new stage) -- new stage iconifies along with other windows, beep, then restores
2. WINDOW_MODAL, UNDECORATED, full-screen either by checking the box or pressing the button on the new stage) -- window does not go full screen

So far I haven't seen any regressions, but it's worth some additional testing.

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PR Comment: https://git.openjdk.org/jfx/pull/1605#issuecomment-2941041523