Is it possible to set the widths of the regions controlled by a PtDivider from code? I see that the Pt_ARG_DIVIDER_SIZES
 resource is read-only. If I set the size of one (or all?) of the children, will the PtDivider get the message?

I'd like to start out with a saved configuration but allow the user to drag the divider to adjust. I would also like to 
override the PtDivider's response to a resize event from above. Rather than adjusting only the last element(s), I would 
like to keep the children in the same ratio of sizes (or perhaps a somewhat more subtle relationship, depending on the 
content)

Can anyone suggest the best strategies for achieving this functionality?