[Bug 40815] New: comctl32: Leftmost position of trackbar not selectable with mouse, slider initial position wrong

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40815

            Bug ID: 40815
           Summary: comctl32: Leftmost position of trackbar not selectable
                    with mouse, slider initial position wrong
           Product: Wine
           Version: 1.9.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: comctl32
          Assignee: wine-bugs at winehq.org
          Reporter: markk at clara.co.uk
      Distribution: ---

I noticed this problem when using WinUAE. The issue is not present with native
(Windows) comctl32.

To reproduce:
 - Use winecfg to tell Wine to use native comctl32.
 - Download and run the WinUAE installer.
http://www.winuae.net/files/InstallWinUAE3300.msi
 - Run WinUAE. Click "CPU and FPU" in the treeview at the left side of the
window.
 - There are two radio buttons in the CPU Emulation Speed section, "Fastest
possible" and "Approximate A500/A1200 or cycle-exact", below which is a
trackbar.
 - Click "Fastest possible". The trackbar scale changes; notice that the slider
moves to the rightmost position and CPU Speed below reads +0%.
 - Click the other radio button. The trackbar scale and slider position change
back.
 - Click "Fastest possible" again.
 - Click and drag the trackbar slider all the way to the left. CPU Speed
indicator moves to -10%, -20%, ... and finally -90% at the leftmost position.

 - So far so good. Now quit WinUAE and use winecfg to use built-in comctl32.
 - Run WinUAE again and click CPU and FPU.
 - Click the two radio buttons mentioned above alternately. Notice how the
slider position does not change, unlike with native comctl32. So when you click
Fastest possible, the slider remains in the leftmost position, but the CPU
Speed indicator below says +0% (the slider should actually be in the rightmost
position now).
 - Click Fastest possible, then click and drag the slider left and right.
Notice that you can't drag it to the leftmost position. In order to move the
slider there you have to use the keyboard. Visually, as you drag the slider to
the right, notice that it "jumps ahead of" the mouse cursor.

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