[Bug 57990] New: Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

Bug ID: 57990
           Summary: Scrollbars of dotnet application always scrolls in
                    both directions (horizontal and vertical)
           Product: Wine
           Version: 10.3
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I try to get a dotnet application, which has an editor control (IDE) with a
vertical and an horizontal scrollbar on board, running.
If i scroll vertically or horizontally with the depending scrollbar it always
scrolls in the other direction too!
What can be the problem?
What can I try to solve this behaviour?

I installed this packages 
- winetricks --unattended vcrun2019
- winetricks --unattended corefonts
- winetricks --unattended dotnetdesktop8

Thank You!

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #1 from [e-mail] ---
An additional information: 
If I scroll with the touchpad of my notebook it works correctly... only if I
scroll with the scrollbar the issue happens.

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #2 from Nikolay Sivov  ---
Do you have a test application for this?

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #3 from [e-mail] ---
Unfortunately not, it is again a proprietary application. :/
Which component is responsible for scrollbars?

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #4 from [e-mail] ---
Maybe User32/scroll.c ?

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #5 from [e-mail] ---
It seems win32u/scroll.c is responsible for this task.
I did some debugging but till now the mouse move event seems to be valid.
"Vertical" is detected correct.

else if (msg == WM_MOUSEMOVE)
.
.
.
                send_message( owner_hwnd, vertical ? WM_VSCROLL : WM_HSCROLL,
                              MAKEWPARAM( SB_THUMBTRACK,
g_tracking_info.thumb_val ),
                              (LPARAM)ctl_hwnd );
.
.
.

}

Till now I did not find any reason, why it not works if I move the scrollbar
via mouse.
If I move it via arrows or mouse wheel it works.
Do you have an idea where I could search next?

[Bug 57990] Scrollbars of dotnet application always scrolls in both directions (horizontal and vertical)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57990

--- Comment #6 from [e-mail] ---
The parent window is probably misinterpreting the WM_VSCROLL event here...
unfortunately I don't know how to debug this further :/