Datagrid scrolling problem

Question

I'm trying to create a contact search/selection component
that works somewhat like a combobox (more like SuperComboBox
http://blog.strikefish.com/blog/index.cfm/2008/3/21/Flex-Smart-Combo-aka-look-ahead-combo
See sample at
http://www.eval.rmc.psu.edu/dgt/DataGridTest.html
Source view is enabled.
Basically, after the user types a few characters of the last
name, a datagrid (separate component) is popped up and presents a
list of matching contacts. The component includes view edit add
buttons, too (which are not active in the included example).
This all works great except for a couple of problems with the
popped up datagrid. I've tried both the standard and advanced dg's
and the both act the same.
If the number of rows returned exceeds the area of the
datagrid (12 rows in the example), the datagrid, as expected,
displays a vertical scroll bar. The scrollbar/datagrid doesn't work
properly at that point, though. Clicking the down arrow or in the
scrollbar track or the down arrow DOES NOT scroll the data.
Grabbing the slider bar and dragging it down DOES scroll the data
down. However, when I do scroll down using the slider, clicking on
a row does not fire the itemClick event, and the grid scrolls up to
the first 12 lines and highlights a row in the first 12 rows. CLICK
does get fired but always returns a row between 1 and 12.
Now, ideally, the user is going to type 3 or 4 characters of
the last name and zero right in on the contact they're looking for
without the need for scrolling, but there are always the outliers
like 'Smith' that return a large number hits (the example uses PA
Legislators offices, so it's not quite representative of the
end-use data set). Regardless, the datagrid object doesn't appear
to work correctly when it's a component -- I'm not sure if it's a
bona fide bug, or the whether it's that the grid is a component,
contained in a canvas, or being popped up that's the problem. More
likely, my flex newbie self just doesn't have some vital attribute
set correctly, or I'm doing something else that's not correct.
Any insights would be greatly appreciated.
Thanks,
want-a-dw
Sample code included.
Windows XP SP2
Flex Builder 3.0.205647
Same results with these browsers/player versions.
Firefox 2.0.0.17, Flash Player 9.0.124.0 (and 9.0.115.0)
IE 6.0.2900.2180, Flash Player 9.0.124.0 (and 9.0.115.0)
Chrome 0.2.149.30, Flash Player 9.0.124.0

Answer 1

> That is definitely incorrect behavior.
> Does this happen in a simple test app? I think I have an
example I can try with, I will post back what I find.
Yes. There is an example of the behavior at
http://www.eval.rmc.psu.edu/dgt/DataGridTest.html
and source code view is enabled. Thanks for your help.