Hi!
I have been trying to see if there is a way to create summary data with
grouping columns so that the summary data could be used with components other
than AdvancedDataGrid (like charts etc.). I have flat data (about 5K rows with
20 columns) in an ArrayCollection and need to slice the data about five
different ways for charts.
I could do it manually while iterating through the collection (or get
aggregated datasets from by BlazeDS service) but I was wondering if there is an
existing grouping function that could be used.
I'm not even sure if it is a good to do all the aggregation on the client (i
have a feeling it will take too long) - would I be better of getting the
aggregated data from the server?

Thanks,
Ram

"rsarma" <webforumsuser@macromedia.com> wrote in message
news:gg2eqg$h15$1@forums.macromedia.com...
> Hi!
> I have been trying to see if there is a way to create summary data with
> grouping columns so that the summary data could be used with components
> other
> than AdvancedDataGrid (like charts etc.). I have flat data (about 5K rows
> with
> 20 columns) in an ArrayCollection and need to slice the data about five
> different ways for charts.
> I could do it manually while iterating through the collection (or get
> aggregated datasets from by BlazeDS service) but I was wondering if there
> is an
> existing grouping function that could be used.
> I'm not even sure if it is a good to do all the aggregation on the client
> (i
> have a feeling it will take too long) - would I be better of getting the
> aggregated data from the server?

You can use GroupingCollections however you want. I didn't do summary rows,
but check out this example:
http://flexdiary.blogspot.com/2008/0...featuring.html

Hi Amy,
Thanks a bunch for your example - Definitely sheds a lot of light on the
GroupingCollection objec. However, I still can't figure out how to use the
SummaryRow if I define one (seems to be specific to advanced data grid since it
uses placement etc.). I am new to flex and have only been using it for a couple
of days now.

If i use summaryPlacement="group" I can access it through the getRoot() function. Is this documentation hard to find or is it just me (granted I have only been using flex for a few days now)?

"rsarma" <webforumsuser@macromedia.com> wrote in message
news:gg42bd$k1l$1@forums.macromedia.com...
> If i use summaryPlacement="group" I can access it through the getRoot()
> function. Is this documentation hard to find or is it just me (granted I
> have only been using flex for a few days now)?

When I did the example, I spent a lot of time in the language reference in
the GroupingCollection, Grouping, and GroupingField. If you've only been
using Flex a few days, you might find this useful:

http://flexdiary.blogspot.com/2008/0...x-builder.html

I think that the Flex team did not intend for people to use these classes
outside of ADG, but I find them extremely useful in all kinds of other
situations. Sorry I can't offer more specific help.

-Amy