Platform preferences theme detection

[Christopher Schnick]

I am using JDK 21+35 and JavaFX 22-ea+28 to run the project on macOS. I 
guess I can try upgrading to JDK 21.0.2, but I will just assume that 
there haven't been many changes to awt in that time.

Interestingly, I found another issue that occurs when that call to 
|GraphicsEnvironment| is made/not made where it is not possible to quit 
a JavaFX application via the dock quit operation when it is minimized to 
an AWT tray icon. I can file a separate issue for that.

On 12/02/2024 17:20, Kevin Rushforth wrote:
> That likely means that initializing the AWT toolkit is interfering 
> with this functionality.
>
> I presume you are using a very recent ea build of JavaFX 22. What 
> version of JDK are you using?
>
> -- Kevin
>
>
> On 2/10/2024 9:05 PM, Christopher Schnick wrote:
>>
>> Well, that is going to be a fun one to debug ... In my application I 
>> check for a headless environment with 
>> GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices(). 
>> If you call that one before you initialize your application, the 
>> preferences detection does no longer update. So if you augment your 
>> PlatformPreferencesChangedTest application with this main method, it 
>> no longer works. Also, it throws another exception when clicking on 
>> the fail button.
>>
>> |    public static void main(String[] args) {
>> GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();
>>         Application.launch(args);
>>     }|
>>
>> On 10/02/2024 18:44, Michael Strauß wrote:
>>> Since I can't reproduce the error on macOS, it's hard to say what
>>> could be causing it.
>>>
>>> If you have the chance, maybe you could run the
>>> PlatformPreferencesChangedTest application:
>>> https://github.com/openjdk/jfx/blob/master/tests/manual/events/PlatformPreferencesChangedTest.java
>>>
>>> That might rule out that the differences we're seeing have anything to
>>> do with the way we're using the API.
>>>
>>>
>>> On Sat, Feb 10, 2024 at 6:23 PM Christopher Schnick<crschnick at xpipe.io>  wrote:
>>>> I checked again, restarted everything, but still the same problem:
>>>>
>>>> Furthermore, I also tested it on my Asahi Fedora Linux with the latest KDE Plasma. The preferences values there are all detected correctly, but are never updated at runtime when changed in the settings menu.
>
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