connecting lines (spanners?) between arbitrary grobs/locations

[Kieren MacMillan]

Hello all,

Inspired by a thread on the -user list, and my own recent struggles with the 
issue, I'm wondering about the technical possibilities of connecting arbitrary 
grobs on a system or page.

I've attached a screenshot of a Schenker graph (one of 22 I was hired to code 
for a music theory journal) in which I needed to have arrows connecting two 
notes (or at least pointing from one towards the other). One example was within 
a single staff, another was between two staves. In order to do this quickly, I 
resorted to trial-and-error markups — but I would have loved a mechanism by 
which I could identify the two "end-grobs", and then have the 
line/arrow/bracket/whatever drawn automagically.

I know we have spanner-id to connect multiple/nested spanners (e.g., slurs) in 
a single context.
Can the same concept be used between contexts?

Thanks for any insights!
Kieren.


________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info <http://www.kierenmacmillan.info/>
‣ email: address@hidden <mailto:address@hidden>