On Sat, 11 Apr 2026 19:18:10 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.
>> 
>> It refactors the Glass GTK implementation with a primary focus on window 
>> sizing, positioning, and state management, addressing a number of 
>> long-standing issues.
>> 
>> Previously, three separate context classes existed, two of which were used 
>> for Java Web Start and Applets. These have been unified, as they are no 
>> longer required.
>> 
>> Additional tests have been introduced to improve coverage. Some tests 
>> produced different results depending on the StageStyle, so they have been 
>> converted to use `@ParameterizedTest` to exercise multiple styles.
>> 
>> Although the primary focus is XWayland, the changes have also been verified 
>> to work correctly on Xorg.
>> 
>> This replaces #1789. It removes the use of GdkWindow in favor of GtkWindow, 
>> reducing risk and simplifying the review process while preserving the same 
>> set of bug fixes. Additionally, #2025 requires a `GtkWindow` to be used when 
>> setting the parent of the file chooser dialog.
>> 
>> To show debug messages,  build with `-PCONF=DebugNative`  and run with 
>> `-Djavafx.glass.gtk.verbose=CATEGORY` 
>> 
>> `CATEGORY` can be one or more of:
>> - all
>> - size
>> - position
>> - focus
>> - state
>> - lifecycle
>> - input
>> - dialog
>> 
>> Multiple categories can be specified by separating them with commas (e.g. 
>> size,focus,input).
>> 
>> A manual test is provided:
>> `java @build/run.args tests/manual/stage/TestStage.java`
>> 
>> I have added constants for delay times in systemTests (`Util.java`) for 
>> geometry, state, and focus. These can be configured at runtime, for example: 
>> `-Dtest.geometry.delay=DELAY`. Please let me know if you would prefer these 
>> to be removed.
>> 
>> When a window property is set, it is reported immediately. However, once it 
>> reaches the native Glass layer, it may be adjusted or rejected, causing the 
>> property to be updated again. Introducing a delay helps ensure the final 
>> state has been applied before it is verified.
>> 
>> Additional testing on other OS versions and manual validation is in progress.
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Thiago Milczarek Sayao has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   - Improve LOG
>   - Details on going back to GtkWindow
>   - unref cursor

Reviewers: @lukostyra and some combination of: @mstr2 @beldenfox @kevinrushforth

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

PR Comment: https://git.openjdk.org/jfx/pull/2139#issuecomment-4245259757

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