🚀 go-pugleaf

I want to draw a rectangle around some painted text.  Using the paint tools
I can paint the text and draw a rectangle.  I would like to be able to 
code the message handler in such a way as to be able to change the textFont and 
still know how big the extent rectangle is.  What I mean by extent rectangle is
the rectangle that will just enclose the painted text.

How do I find the extent rectangle of some painted text?  For example:

on mouseUp
	choose text tool
	click at 50,50
	type "1234567890"
	doMenu select
	? How do I get the rectangle of the selection 
	? so I can draw a rectangle around the painted text?
	?
end mouseUp

Is such an incantation possible?

Ken Warner