Several GTK issues on latest Ubuntu release

[Christopher Schnick]

That is good to know that this issue is already being worked on. From 
the description of https://bugs.openjdk.org/browse/JDK-8316423, this 
issue is only tracked as affecting secondary stages? At least in our 
case it affects the primary stage as well, i.e. the one that is supplied 
via Application.start. Also, in this case it's not really about the 
scene dimensions, the stage doesn't even apply its own dimensions that 
were explicitly set before.

On 10/23/2023 4:39 PM, Thiago Milczarek Sayão wrote:
> Forgot to mention: except for the system tray, I'm not looking into that.
>
> Em seg., 23 de out. de 2023 11:36, Thiago Milczarek Sayão 
> <thiago.sayao at gmail.com> escreveu:
>
>     Hi Cristopher,
>
>     https://github.com/openjdk/jfx/pull/1249
>
>     We noticed it and I'm working on a fix.
>
>     There's one issue that is probably a mutter bug:
>
>     https://gitlab.gnome.org/GNOME/mutter/-/issues/3092
>
>     -- Thiago
>
>     Em seg., 23 de out. de 2023 10:05, Christopher Schnick
>     <crschnick at xpipe.io> escreveu:
>
>         Hello,
>
>         a user of our application xpipe
>         <https://github.com/xpipe-io/xpipe> reported several issues
>         after upgrading their Ubuntu version and I investigated them
>         myself. I want to note here that these issues are exclusive to
>         new Ubuntu versions. I did not observe any of them on slightly
>         older Ubuntu versions or other Gnome-based desktop
>         environments. I don't know exactly which versions are
>         affected, but 22.04 works fine and Ubuntu 23.10 does not.
>
>         I'm sorry that I'm not able to create fully reproducible
>         examples or dig deeper into the causes here, but I'm very
>         constrained on time right now. For reproduction, I just
>         installed a new default Ubuntu 23.10 VM and launched the
>         JavaFX 21 application straight out of the box.
>
>         The first issue is that windows do not retain their
>         information when being hidden and then shown again. I.e. after
>         being shown for the second time, they will have tiny
>         dimensions and an GTK error is printed to stderr about height
>         < 0. For now I temporarily resolve this by doing the
>         following, which somehow fixes the issue:
>
>                 stage.show();
>
>                 // Due to some weird GTK bug, we have to set these
>         sizes every time we show a window again even though they have
>         been previously set
>                 stage.setX(stage.getX());
>                 stage.setY(stage.getY());
>                 stage.setWidth(stage.getWidth());
>                 stage.setHeight(stage.getHeight());
>
>         Furthermore, while this is technically not purely JavaFX
>         related, there is also a total freeze of the platform thread
>         when it calls javax.swing.UIManager.setLookAndFeel as it gets
>         stuck in some GTK implementation method. This is called by the
>         fxtrayicon library, which calls this method here
>         <https://github.com/dustinkredmond/FXTrayIcon/blob/81c99a7357d8f48d9547c0bdb54b848041ce67c6/src/main/java/com/dustinredmond/fxtrayicon/FXTrayIcon.java#L923>.
>         Since there is no native JavaFX tray integration, calling
>         these awt/swing related methods is quite important for
>         applications trying to use the system tray. This was a very
>         unfortunate issue for us as it caused applications to not
>         start up at all on affected systems.
>         I wasn't able to compare the behavior to Ubuntu 22.04 as
>         SystemTray.isSupported() returns false on Ubuntu 22.04 but
>         returns true on Ubuntu 23.10. Should this even return true on
>         Ubuntu now or is this a bug?
>
>         Again, these issues only occur on the very latest Ubuntu
>         release. I have tested on a lot of other different distros,
>         old and new, and they all worked flawlessly.
>
>         Best regards, Christopher
>
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