RFR: 8260528: Clean glass-gtk sizing and positioning code [v35]

[Thiago Milczarek Sayao]

On Mon, 19 Dec 2022 15:29:28 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> **About Ubuntu 16.04:**
>> - `RestoreSceneSizeTest` should be fixed;
>> - I kept `gtk_window_focus_on_map` `TRUE` on Compiz - so it will behave as before;
>> -  I introduced a `WindowManager` enum in case different work arounds are needed for other window managers;
>> - About Live resizing: master branch does not live resize as well (at least on my VM);
>> 
>> **About the black area**
>> - It does not happen on a Ubuntu 20.04 VM I installed, but I did some overall improvements on consistency while testing on 16.04. Maybe it's gone.
>
>> **About Ubuntu 16.04:**
>> 
>> * `RestoreSceneSizeTest` should be fixed;
> 
> Confirmed. This now passes for me.
> 
>> * I kept `gtk_window_focus_on_map` `TRUE` on Compiz - so it will behave as before;
>> * I introduced a `WindowManager` enum in case different work arounds are needed for other window managers;
> 
> OK, I'll test it towards the middle of this week (I don't have direct access to my 16.04 system at the moment).
> 
>> * About Live resizing: master branch does not live resize as well (at least on my VM);
> 
> OK. This is not worth worrying about in any case.
> 
>> **About the black area**
>> 
>> * It does not happen on a Ubuntu 20.04 VM I installed, but I did some overall improvements on consistency while testing on 16.04. Maybe it's gone.
> 
> I still see the black band consistently on my Ubuntu 20.04 VM.

@kevinrushforth are you using the default window manager on Ubuntu 20.04? Is it updated? Just so I can reproduce the issue (of the black header).

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

PR: https://git.openjdk.org/jfx/pull/915