On Wed, 15 Oct 2025 18:46:20 GMT, Thiago Milczarek Sayao <[email protected]> 
wrote:

>> This is a continuation to 
>> [JDK-8236651](https://bugs.openjdk.org/browse/JDK-8236651) and it aims to 
>> stabilize the linux glass gtk backend.
>> 
>> This is a refactor of the Glass GTK implementation, primarily focused on 
>> window size, positioning, and state management to resolve numerous issues.
>> 
>> The main change is that GtkWindow (which is a GtkWidget) has been replaced 
>> with a direct use of GdkWindow for windows. This makes sense because GTK 
>> includes its own rendering pipeline, whereas JavaFX renders directly to the 
>> underlying system window (such as the X11 window) via Prism ES2 using GL and 
>> GLX. Most GTK window-related calls have equivalent GDK calls. Since GDK 
>> serves as an abstraction over the system window and input events, it aligns 
>> better with the purposes of Glass. Additionally, using GTK required various 
>> workarounds to integrate with Glass, which are no longer necessary when 
>> using GDK directly.
>> 
>> It uses a simple C++ Observable to notify the Java side about changes. This 
>> approach is more straightforward, as notifications occur at many points and 
>> the previous implementation was becoming cluttered.
>> 
>> Previously, there were three separate context classes, two of which were 
>> used for Java Web Start and Applets. These have now been unified, as they 
>> are no longer required.
>> 
>> Many tests were added to ensure everything is working correctly. I noticed 
>> that some tests produced different results depending on the StageStyle, so 
>> they now use @ParameterizedTest to vary the StageStyle.
>> 
>> A manual test is also provided. I did not use MonkeyTester for this, as it 
>> was quicker to simply run and test manually:`java @build/run.args 
>> tests/manual/stage/TestStage.java `
>> 
>> While this is focused on XWayland, everything works on pure Xorg as well.
>
> Thiago Milczarek Sayao has updated the pull request with a new target base 
> due to a merge or a rebase. The pull request now contains 81 commits:
> 
>  - Merge branch 'master' into 8354943
>    
>    # Conflicts:
>    #  modules/javafx.graphics/src/main/native-glass/gtk/glass_window_ime.cpp
>  - Merge branch 'master' into 8354943
>  - Fix copyright header
>  - Revert "8367898: Skip StageFocusTest on Linux"
>    
>    This reverts commit c95cdcdc9cd8b3070e8076ea91234772d6a21331.
>  - Merge branch 'master' into 8354943
>  - Remove unused imports
>  - - Fix StageOwnershipTest label + minor adjustments
>  - Merge branch 'master' into 8354943
>  - Merge branch 'master' into 8354943
>  - - Fix scene resize when window is unresizable
>  - ... and 71 more: https://git.openjdk.org/jfx/compare/38300ca6...07d1cd31

tests/system/src/test/java/test/javafx/stage/SizingTest.java line 159:

> 157:     void minSize(StageStyle stageStyle) {
> 158:         // JDK-8364547
> 159:         assumeTrue(!PlatformUtil.isWindows());

I can confirm that PR #1870 fixes the underlying bug, JDK-8364547. Once that PR 
is integrated, merge master and then remove this `assumeTrue`.

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

PR Review Comment: https://git.openjdk.org/jfx/pull/1789#discussion_r2433889944

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