RFR: 8317116: Provide layouts for multiple test UI in PassFailJFrame [v3]

[Alexander Zvegintsev]

On Fri, 27 Sep 2024 14:41:57 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Provides a set of default layouts for manual test using multiple test UI windows.
>> 
>> The initial implementation in the demo in #15721 was too complicated. After looking at the simplified version used in #21180, I re-worked the layouts into separate methods.
>> 
>> The layout methods are in `WindowLayouts` class next to `PassFailJFrame`. It is not necessary to mention it explicitly in the `@build` jtreg tag.
>> 
>> The builder now provides new methods:
>> 
>> - `positionTestUIRightRow` positions the test UI windows in a row to the right of the instruction frame. The top of the windows is aligned to that of the instruction frame.
>> - `positionTestUIRightColumn` positions the test UI windows in a column to the right of the instruction frame. The top of the first window is aligned to that of the instruction frame.
>> - `positionTestUIRightColumnCentered` positions the test UI windows in a column to the right of the instruction frame centering the stack of the windows.
>> - `positionTestUIBottomRow` positions the test UI windows in a row to the bottom of the instruction frame. The left of the first window is aligned to that of the instruction frame.
>> - `positionTestUIBottomRowCentered` positions the test UI windows in a row to the bottom of the instruction frame centering the row of the windows.
>> - `positionTestUIBottomColumn` positions the test UI windows in a column to the bottom of the instruction frame. The left of the first window is aligned to that of the instruction frame.
>> 
>> If required, the test developer can provide a custom implementation.
>
> Alexey Ivanov has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Remove extra line layoutRow
>  - bottomOneRowCentered: layoutColumn -> layoutRow

Marked as reviewed by azvegint (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21207#pullrequestreview-2333995930