RFR: 8306121: Scene not rendered initially when changing scenes after fix for JDK-8296621 [v5]

[Thiago Milczarek Sayao]

On Mon, 24 Apr 2023 23:37:05 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> modules/javafx.graphics/src/main/java/com/sun/glass/ui/gtk/GtkWindow.java line 51:
>> 
>>> 49:     // empty - not needed by this implementation
>>> 50:     @Override
>>> 51:     protected native void _updateViewSize(long ptr);
>> 
>> Is there a system test that can be used to verify these changes on Linux? Since you have mentioned this is the same as #1054, I take that SetSceneScalingTest can be used. 
>> 
>> Also, I'm not sure how you would run WinIconified test attached to the JBS ticket to see that it fails or passes. If that can be converted to system test, could you add it to this PR?
>
> I noticed this earlier, and filed [JDK-8298500](https://bugs.openjdk.org/browse/JDK-8298500) to improve our test coverage in this area.
> 
> It would be good to make sure that we have a test that does this for at least an inconified window to help validate this PR.

I could do a Iconified test, but I think it would not test the case that happened before, the window pops (because of `requestFocus`) and then gets iconified (the user sees the window showing then iconifying).

-------------

PR Review Comment: https://git.openjdk.org/jfx/pull/1110#discussion_r1175887641