RFR: 8284521: Write an automated regression test for RFE 4371575 [v2]

[Sergey Bylokhov]

On Fri, 8 Apr 2022 07:08:25 GMT, Manukumar V S <mvs at openjdk.org> wrote:

>> Write an automated regression test for [JDK-4371575](https://bugs.openjdk.java.net/browse/JDK-4371575)
>> 
>> Issue:
>> As part of the Merlin focus project, JComponent.setRequestFocusEnabled was
>> deprecated and its implementation was changed to map exactly to the new
>> method Component.setFocusable. Scott believes that the old behavior may be
>> preferable. He would like to be able to specify that a Component is focusable,
>> and should receive focus during keyboard traversal, but that it should not
>> automatically take focus when the user clicks on it with the mouse.
>> 
>> We are concerned that the accessibility team would be against this behavior,
>> and this also seems like more of a PLAF issue. Nevertheless, we should look
>> into it before beta ships.
>> 
>> Fix:
>> After some discussion we decided that the best balance of the old and new would be to make this an advisory property. This property will not be synonymous with focusable. Instead our mouse listeners will check this property before requesting focus. This provides as closely as possible the old behavior, while allowing people to use the new focusable property if they don't want a component focusable at all.
>> 
>> Testing:
>> Tested in mach5, 10 times with all the 3 available platform like macosx, windows and linux and got all Pass.
>
> Manukumar V S has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review comment fixed: Removed unwanted directory

Marked as reviewed by serb (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8143