[Bug 5021] New: Inconsistent view when dragging listview columns divider

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5021

Summary: Inconsistent view when dragging listview columns divider
           Product: Wine
           Version: 0.9.11.
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-gui
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

When I resize the columns of the listview by dragging the header columns
divider, the list columns scrolls after every mouse move while the header draws
only a track line and resizes only after releasing the mouse button. It seems
that this behaviour is because:
  * The listview scrolls the columns after receiving the HDN_TRACK notification
even if the header doesn't have the HDS_FULLDRAG style
  * The header is created without the HDS_FULLDRAG style so it is correct that
it only draws a track line.
  * When the header is in the HDS_FULLDRAG mode it sends HDN_TRACK notification
and expects a TRUE answer unlike the MS implementation that sends
HDN_ITEMCHANGING and expects a FALSE answer.

I've written a patch that shows how I think it should be implemented - after
applying it the listviews are in the full drag mode but can be changed to the
tracking line mode by clearing the HDS_FULLDRAG bit - the same as for the MS
implementation. But of course I don't know if it doesn't break anything.