[Bug 24514] LVM_SUBITEMHITTEST should return negative subitem index for negative Y coordinate

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=24514

--- Comment #5 from Austin Lund <austin.lund at gmail.com> 2010-09-26 03:55:52 CDT ---
(In reply to comment #4)
> 
> You need LVM_GETITEMRECT and then 'y = (top - bottom)/2' to be placed half item
> height outside list visible area.

I get the following from LVM_SUBITEMHITTEST:

-y coord   return

37 to ??     1
4 to 36      0
-13 to 3    -1
-30 to -14  -2
-31 to -47  -3
-48 to ??   -4

which has a difference of 16 except for zero which is double this.  The
vertical spacing from LVM_GETITEMSPACING is 17 (off by one?).  LVM_GETITEMRECT
does appear to have an overlap as for me in this case as item 1 has top 37
bottom 54, but item 0 has top 20 bottom 37.  Perhaps LVM_GETITEMSPACING just
subtracts these without taking the overlap into account.

I think this is enough to write a test.

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