How can I report on all accounts under a particular parent account?

[Mark Hanford]

Hi, all.

I'm using GC to track our personal finances, and have been using the
standard report "Expense Pie Chart".

I've created a custom report from this with just a subset of accounts
(all those under my "Joint" account) which works fine. The problem is,
when I create new accounts under this (perhaps a new breakdown of
expenditures) I have to remember to edit the report to add the new
account(s) to it.

Is it possible to set the report conditions to be "all accounts under
{this} account"?

Currently it's using a discreet list:

(let ((option (gnc:lookup-option options
                                 "Accounts"
                                 "Accounts")))
  ((lambda (option) (if option ((gnc:option-setter option)
'("1d54f378bb7a8b0f6ecd79902ce54fee"
"578ff65f0e42e131e41b0e2ef028a02d" "2a66313aab08dcde48a688fda4a89498"
"0be05d94381c6f1dcbffb9f22a64efa9")))) option))

Thanks,

Mark