RFR: 8370446: Support dialogs with StageStyle.EXTENDED [v3]

[Michael Strauß]

On Wed, 12 Nov 2025 19:05:30 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Michael Strauß has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains seven additional commits since the last revision:
>> 
>>  - documentation
>>  - Merge branch 'master' into feature/extended-dialog
>>  - move HeaderBar to DialogPane
>>  - document/verify preview feature
>>  - Ensure that DialogPane is always attached to Scene
>>  - Lazily initialize Dialog.headerBar
>>  - Support dialogs with StageStyle.EXTENDED
>
> modules/javafx.controls/src/main/java/javafx/scene/control/DialogPane.java line 221:
> 
>> 219:         headerTextPanel = new GridPane();
>> 220:         headerTextPanel.setVisible(false);
>> 221:         headerTextPanel.setManaged(false);
> 
> Why was this change needed? At first glance it seems unrelated to supporting an (optional) header bar.

This was left over from a previous bug-fixing attempt. I've removed the added code.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1943#discussion_r2522779075