Several GTK issues on latest Ubuntu release

[Thiago Milczarek Sayão]

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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