RFR: 8187759: Background not refreshed when painting over a transparent JFrame [v2]

[Tejesh R]

On Thu, 15 Feb 2024 03:35:17 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Somehow the automated test is not working flawless in windows and mac. In windows the image is getting stuck at center of white frame when its made automatic and in mac CI machines are failing even though the white screen is clear. Since the fix is specifically for linux I think we can leave the test for linux alone.
>
> It is better to check why it fails there, it uses the public api only and it should work on all platforms.

On windows the robot mouse move doesn't drag the frame as smooth as in linux, it is getting stuck within the white frame. On Mac though the drag is smooth, somehow the test is failing sometimes on CI system (Nothing to do with the fix, just about the automated test which compares the RGB values).

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PR Review Comment: https://git.openjdk.org/jdk/pull/17081#discussion_r1490403307