I want to have a summary row at the top of an AdvancedDataGrid that is not actually a summary of the values in the row: I want to stuff values in there "by hand".
I have no problem writing an ItemRenderer that will figure out which header cell it's showing and lookup the value I want in there. I just don't know how to create the second row of the header in the first place.
I've looked at spanning headers, and I guess I could create a single-column span for every column, but perhaps a more elegant solution exists.
Thanks for any suggestions