embedding arbitrary graphics in text

I'm fleshing out a Smalltalk binding to Pango, and want to be able to show breakpoint graphics embedded at arbitrary points in the text.

I found the pange_attr_shape_new() function, but I don't know if that's what I want at all.

ATM, what would seem cool, is a way of having an Attribute that says "when I draw these items, run this callback with position information, so I can do some custom drawing at this point." But maybe that's the wrong way to think about getting the job done.

Help and pointers and hints appreciated! TIA

Travis Griggs
"I did not have time to write you a short program, so I wrote you a long one instead."

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