On Wed, 10 Sep 2025 13:31:19 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.
>> 
>> List of fixed issues:
>> 
>> 1. [[Linux] Stage.setMaximized() before show() does not 
>> persist](https://bugs.openjdk.org/browse/JDK-8316425)
>> 3. [[Linux] Intermittent test failure in 
>> IconifyTest.canIconifyDecoratedStage](https://bugs.openjdk.org/browse/JDK-8316891)
>> 4. [[Linux] Initial window position is not centered on Ubuntu 24.04 / 
>> Xorg](https://bugs.openjdk.org/browse/JDK-8337400)
>> 5. [[Linux] Some of the SizeToSceneTest fail in Ubuntu 
>> 24.04](https://bugs.openjdk.org/browse/JDK-8353612)
>> 6. [[Linux] View size glitch when resizing past max window 
>> size](https://bugs.openjdk.org/browse/JDK-8355073)
>> 7. [RestoreSceneSizeTest fails in Ubuntu 
>> 24.04](https://bugs.openjdk.org/browse/JDK-8353556)
>> 8. [DualWindowTest...
>
> 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 73 commits:
> 
>  - Merge branch 'master' into 8354943
>  - - Fix scene resize when window is unresizable
>  - - Fix "Incomplete attachment. (GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT)(FBO - 
> 820)" when changing view
>  - - Fix tests
>  - - Fix FOCUS_LOST begin sent on focused windows
>  - - Remove CenterOnScreenTest.java
>  - Merge branch 'master' into 8354943
>  - - Fix (SetSceneScalingTest)
>  - - Fix mistake (assertTrue -> assumeTrue)
>  - - Add hint about macOS beeps
>    - Disable some tests on specific platforms
>  - ... and 63 more: https://git.openjdk.org/jfx/compare/3e376e66...8bc6c4b6

I've been going through the review and tests here, I still have some more code 
to review but I did notice there are some test failures on Windows:

StageOwnershipTest. 
openingModalChildStageWhileFullScreenShouldHaveFocus(StageStyle, Modality) [3] 
UNDECORATED, APPLICATION_MODAL
StageOwnershipTest. 
openingModalChildStageWhileFullScreenShouldHaveFocus(StageStyle, Modality) [4] 
UNDECORATED, WINDOW_MODAL
StageOwnershipTest. 
openingModalChildStageWhileFullScreenShouldHaveFocus(StageStyle, Modality) [5] 
EXTENDED, APPLICATION_MODAL
StageOwnershipTest. 
openingModalChildStageWhileFullScreenShouldHaveFocus(StageStyle, Modality) [6] 
EXTENDED, WINDOW_MODAL
StageOwnershipTest. 
openingModalChildStageWhileMaximizedShouldNotUnmaximize(StageStyle, Modality) 
[3] UNDECORATED, APPLICATION_MODAL
StageOwnershipTest. 
openingModalChildStageWhileMaximizedShouldNotUnmaximize(StageStyle, Modality) 
[4] UNDECORATED, WINDOW_MODAL
StageOwnershipTest. 
openingModalChildStageWhileMaximizedShouldNotUnmaximize(StageStyle, Modality) 
[5] EXTENDED, APPLICATION_MODAL
StageOwnershipTest. 
openingModalChildStageWhileMaximizedShouldNotUnmaximize(StageStyle, Modality) 
[6] EXTENDED, WINDOW_MODAL 


One StageOwnershipTest - `iconifyParentShouldHideChildren [DECORATED]` - also 
consistently fails on my Ubuntu 24.04.2 VM.

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

PR Comment: https://git.openjdk.org/jfx/pull/1789#issuecomment-3275531952

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