RFR: 8306121: Scene not rendered initially when changing scenes after fix for JDK-8296621 [v18]

[Thiago Milczarek Sayao]

On Mon, 5 Jun 2023 22:50:00 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> I ran an automated test job using your latest patch and all of the tests now pass.
> 
> > Maybe it's possible to do a Java fix where the new Scene without size inherits the old Scene size? This way I think it possible to remove platform specific code such as the one I did and `_updateViewSize`.
> 
> Hmm. That might be problematic. In any case, I don't want to go down that route to fix this bug.
> 
> I have two questions on the current version of the fix:
> 
>     1. Can you explain why the two tests had to be changed? Unless the tests in question really were buggy, and just getting luck before, the changes suggest a change in behavior that applications might notice and be bothered by.
> 
>     2. Are you sure that on Linux, there are no cases where `_updateViewSize` needs to be implemented? Did you consider just leaving it as-is or would that have failed?

I changed it to use `_updateViewSize` so it's compatible with other platforms.

I'm gathering some information to answer about the test changes.

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PR Comment: https://git.openjdk.org/jfx/pull/1110#issuecomment-1577740976