[Bug 20695] Cannot scroll documents being compared in winmerge

http://bugs.winehq.org/show_bug.cgi?id=20695

Andrew Eikum  changed:

What    |Removed                     |Added
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--- Comment #13 from Andrew Eikum  2012-02-09 14:21:12 CST ---
The problem here is SetScrollInfo can set the scrollbar's flags, but doesn't
En/Disable the scrollbar itself. So the flags and actual window state are not
in sync and we end up with this sequence:

EnableScrollBar(ESB_DISABLE_BOTH)
  infoPtr->flags = ESB_DISABLE_BOTH
  EnableWindow(FALSE)

SetScrollInfo(...)
  ...
  infoPtr->flags = ESB_ENABLE_BOTH

EnableScrollBar(ESB_ENABLE_BOTH)
  infoPtr->flags == ESB_ENABLE_BOTH => return

So some possible fixes:
*) SetScrollInfo() is setting the flags incorrectly, or
*) EnableScrollBar() should use some other method to determine if
EnableWindow() needs to be called, or
*) SetScrollInfo() should En/Disable the window to keep the flags in sync

I'll keep looking, but thought maybe something would be obvious to Nikolay.