rich-text on a pinboard?

I keep coming back to the question of whether I can use predefined pane types, 
e.g. rich-text-pane, on pinboard layouts.  I think I've asked a similar 
question before, so there must be something fundamental in my understanding 
about pinboards that is wrong or incomplete...

I have an app that displays a background and I want to scribble selection 
rectangles and text snippets over top of the background.

It would seem that pinboard layouts contain much of the mechanism I need for 
tracking x,y coords and hit-testing, etc.

Rich-text-pane has all of the editing facilities I want (i.e. "notepad" with 
various fonts).

A simple test (below) shows that I *can* draw a rich-text-pane on top of a 
pinboard layout.

The rich-text-pane, in this test, is not a pinboard object. (!?)

I don't see how to make the rich-text-pane into a pinboard-object.  Maybe it 
really doesn't matter, since I want to "pop up" the edit box at specific 
x,y's and then make it disappear when the edit is "done"?

I could continue to dig inside of pinboard layouts and figure out how to make 
the rtf pane appear and disappear, but, it would seem that there should be 
a "sanctioned" way of doing this - or - I shouldn't do it at all 'cause it 
ain't supported.

Am I heading in the right direction or am I heading for disaster?  


(capi:define-interface itest ()
    ()
  (:panes
   (rtpane
    capi:rich-text-pane
    :accessor rtpane
    :min-height 100
    :min-width 100
    :x 100
    :y 100))
  (:layouts
   (one
    capi:pinboard-layout
    '(rtpane)
    :accessor one))
  (:default-initargs
   :best-height 500
   :best-width 500))

(defun test ()
  (let ((it (make-instance 'itest)))
    (capi:display it)))


thanx
pt