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lining up baseline of adjacent NSAttributedString s

i've got several adjacent NSAttributedStrings that i wish to line up their baselines when printing (left, center, and right strings for headers and footers).

i'm doing this successfully by determining the maximum descender for the strings that will print on the same line and then using [NSAttributedString drawWithRect:options:]. and this is working nicely.

however, i originally coded this to use [NSAttributedString drawAtPoint] and calculated the maximum ascender for each string and offset each by an appropriate point. this didn't work! by didn't work, i mean that the baseline of adjacent lines varied by as much as 2 pixels (when viewed with preview).

from my reading of apple docs and cocoa builder archives, it seems to me that either approach should have worked. can someone explain to me why using drawAtPoint and offsetting by ascender didn't work?

just curious.
thanx,
ken
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