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There are several open bug reports of problems in AWT on ubuntu
23.10 (and some on 23.04)<br>
<br>
<a class="moz-txt-link-freetext" href="https://bugs.openjdk.org/issues/?jql=project%20%3D%20JDK%20AND%20component%20%3D%20client-libs%20AND%20labels%20in%20(ubuntu23.04%2C%20ubuntu23.10)">https://bugs.openjdk.org/issues/?jql=project%20%3D%20JDK%20AND%20component%20%3D%20client-libs%20AND%20labels%20in%20(ubuntu23.04%2C%20ubuntu23.10)</a><br>
<br>
Note that GTK is not used to the same extent as it is by FX.<br>
In fact it is used for only 2 things and only one of those can
matter in your app,<br>
and that is that the Swing GTK L&F uses it to get the rendering
of GTK themes.<br>
So if you weren't using the GTK L&F then a Swing app would
likely not even load GTK.<br>
But for a mixed FX + Swing app then of course it will still be
loaded by FX.<br>
<br>
-phil.<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/23/23 7:48 AM, Christopher
Schnick wrote:<br>
</div>
<blockquote type="cite" cite="mid:32447e7f-18c2-432f-b3f3-d2a195fc232a@xpipe.io">
<p>That is good to know that this issue is already being worked
on. From the description of <a class="moz-txt-link-freetext" href="https://bugs.openjdk.org/browse/JDK-8316423" moz-do-not-send="true">https://bugs.openjdk.org/browse/JDK-8316423</a>,
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.<br>
</p>
<div class="moz-cite-prefix">On 10/23/2023 4:39 PM, Thiago
Milczarek Sayão wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAAP_wu=wtowFyiANzR9MOR+EX3c7xhAnF+s6mL8z=wNPU0NWFw@mail.gmail.com">
<div dir="auto">Forgot to mention: except for the system tray,
I'm not looking into that.</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Em seg., 23 de out. de 2023
11:36, Thiago Milczarek Sayão <<a href="mailto:thiago.sayao@gmail.com" moz-do-not-send="true" class="moz-txt-link-freetext">thiago.sayao@gmail.com</a>>
escreveu:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">Hi Cristopher,
<div dir="auto"><br>
</div>
<div dir="auto"><a href="https://github.com/openjdk/jfx/pull/1249" target="_blank" rel="noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/openjdk/jfx/pull/1249</a><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">We noticed it and I'm working on a fix.</div>
<div dir="auto"><br>
</div>
<div dir="auto">There's one issue that is probably a
mutter bug:</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a href="https://gitlab.gnome.org/GNOME/mutter/-/issues/3092" target="_blank" rel="noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">https://gitlab.gnome.org/GNOME/mutter/-/issues/3092</a></div>
<div dir="auto"><br>
</div>
<div dir="auto">-- Thiago </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Em seg., 23 de out. de
2023 10:05, Christopher Schnick <<a href="mailto:crschnick@xpipe.io" target="_blank" rel="noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">crschnick@xpipe.io</a>>
escreveu:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>Hello,</p>
<p>a user of our application <a href="https://github.com/xpipe-io/xpipe" rel="noreferrer noreferrer" target="_blank" moz-do-not-send="true">xpipe</a> 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.<br>
</p>
<p>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.<br>
</p>
<p>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 <font face="monospace">height
< 0</font>. For now I temporarily resolve this
by doing the following, which somehow fixes the
issue:</p>
<p><font face="monospace"> stage.show();<br>
<br>
// 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<br>
stage.setX(stage.getX());<br>
stage.setY(stage.getY());<br>
stage.setWidth(stage.getWidth());<br>
stage.setHeight(stage.getHeight());</font><br>
</p>
<p>Furthermore, while this is technically not purely
JavaFX related, there is also a total freeze of the
platform thread when it calls <font face="monospace">javax.swing.UIManager.setLookAndFeel
</font>as it gets stuck in some GTK implementation
method. This is called by the fxtrayicon library,
which calls this method <a href="https://github.com/dustinkredmond/FXTrayIcon/blob/81c99a7357d8f48d9547c0bdb54b848041ce67c6/src/main/java/com/dustinredmond/fxtrayicon/FXTrayIcon.java#L923" rel="noreferrer noreferrer" target="_blank" moz-do-not-send="true">here</a>. 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.<br>
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?<br>
</p>
<p>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.</p>
<p>Best regards, Christopher<br>
</p>
</div>
</blockquote>
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