[nebula-dev] tree table vs grid

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

Howdy,

I have some use cases where I would like to display in a single table

1) Summary rows...which actually consist of a set of rows...and present 
field values that are (e.g.) sums of the underlying row values

2) The individual underlying records...exposed when needed by 
user...e.g. by opening a tree.

So let's say we have something price of individual items of Furniture 
broken into three categories:

Tables

Chairs

Other

and we have prices:

Table 1   -   $100

Table 2  -    $200

Chair 1   -   $50

Chair 2   -   $40

Sofa 1   -    $500

Sofa 2  -    $300

And we want to have a table that looks like

Furniture Group               Cost

+Tables              $300

+Chairs              $90

+Other               $800

Where (e.g.) Tables could be opened up to present the individual items 
that make up that group

-Tables              $300

   Table 1           $100

   Table 2           $200

etc


Questions

Which Nebula control(s) would be best suited for something like this?  I 
assume XViewer or Grid.

Are there any snippets or public examples of doing something like this?

What if there are multiple grouping types...e.g. Not just furniture type 
but also groupings that are based upon other arrangements of these same 
items...like date manufactured.

Thanksinadvance,

Scott