[Bug 54885] New: The child window flickers after using SetParent API to set parent-child window between windows from different processes.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54885

Bug ID: 54885
           Summary: The child window flickers after using SetParent API to
                    set parent-child window between windows from different
                    processes.
           Product: Wine
           Version: 8.6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

After using the SetParent API to set parent-child window relationship between
windows from different processes, the child window flickers heavily. This issue
seriously affects the user experience of applications that has any different
processes parent-child window. For convenience, I have created a simple demo
program that can reproduce this issue and attached the download link.

Steps to Reproduce:
1.Download the demo program that can reproduce this issue and open it
(SetParentDemo.exe inside) with Wine tool.
2.Click the first button in the program window (the program may crash
occasionally, but it is not the focus of this bug report, just retry the
operation).
3.Drag child window or switch to activate parent child windows, or move mouse
to hover buttons, observe the display of the child window.

Download link of the demo program:
https://drive.google.com/file/d/1MCrnb1N6cLUzVoX_vO4tFO4qlS_qhAwi/view?usp=s...

Other clues: After testing, this issue will occur in WPF form programs packaged
using. NET 6 standalone mode, but it does not occur in programs packaged under
the .NET Framework project (will run on wine mono). Unfortunately, many
applications released using Dotnet standalone mode will only run on their
built-in NET runtime and not on Wine Mono.

System architecture:
x86_64
Ubuntu 20.04
wine 8.6

I appreciate your attention to this matter. If you need further cooperation or
assistance, please feel free to contact me.

[Bug 54885] The child window flickers after using SetParent API to set parent-child window between windows from different processes.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54885

xiaotong  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #1 from xiaotong  ---
I also encountered the same problem, how can I solve it.

[Bug 54885] The child window flickers after using SetParent API to set parent-child window between windows from different processes.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54885

joaopa  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #2 from joaopa  ---
I conform the bug in wine-8.6.
Demo archived at
https://archive.org/details/set-parent-demo

Can an administrator put the link at the URL place?

[Bug 54885] The child window flickers after using SetParent API to set parent-child window between windows from different processes.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54885

--- Comment #3 from Rafał Mużyło  ---
0. source of the demo should be provided too (as it seems to be your program)

Yet, there's a bigger problem.

With wine 8.13 it seems a couple significant regressions have happened.

First one: initially the program window is completely black, though you can
still blindly hit whatever button is there to start the demo proper.

Second, more annoying one: I don't quite understand what is this demo supposed
to do, but once it properly starts after the blind click you can't alt-tab out
of it and while your cursor isn't captured your clicks seem to be; also you
can't switch into another virtual desktop (the wm ones, not wine's). Only
Alt-Fx switching works (so you can login from a different console and kill the
program). This is with mr3405 and mr3411 applied.

[Bug 54885] The child window flickers after using SetParent API to set parent-child window between windows from different processes.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54885

Ken Sharp  changed:

What    |Removed                     |Added
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           Keywords|                            |download
                URL|                            |https://archive.org/details
                   |                            |/set-parent-demo