[Bug 60456] New: Pro Tools Studio 2026.4.1 timeline overlays render outside the application window and over other applications

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60456

            Bug ID: 60456
           Summary: Pro Tools Studio 2026.4.1 timeline overlays render
                    outside the application window and over other
                    applications
           Product: Wine
           Version: 11.19
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
  Target Milestone: ---
      Distribution: ---

Created attachment 82276
  --> http://bugs.winehq.org/attachment.cgi?id=82276
Two screenshots showing the issue, diagnostic results, and notes.

First, I want to acknowledge this occurred on my own Wine 11.19-based build
with the patches associated with Bugs 60454 and 60455.

After opening a session in Pro Tools Studio 2026.4.1, parts of the timeline
rendered outside the Pro Tools window. The same content could remain visible
over another desktop application.

I was using Arch Linux x86-64 with a KDE Wayland desktop. Pro Tools was running
through Wine's X11 driver and XWayland. Direct2D was disabled in the
application config.

On Windows, the timeline stays within the Pro Tools window, is covered by
foreground applications, and disappears when Pro Tools is minimised.

Investigation traced this to the handling of layered child windows in Wine's
X11 driver. An experimental change keeps their position, clipping, visibility,
and stacking in sync with their parent windows. 

Second, I acknowledge Wine's policy on LLM-generated code, as such I am not
requesting a merge. My LLM-generated experimental change does exist in my own
personal GitHub fork for reference:
(https://github.com/LunchBox951/wine/pull/3)

Please let me know if there is anything I can do to assist the maintainers.

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