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Attributed titles for buttons

I'm in the process of reworking a periodic table of the elements in a program of mine, and have wondered as to the soundness of my drawing method.

I currently override drawInteriorWithFrame: to fill in a colored background and call custom methods to size, position, and place the title (which I use for the elemental symbol) and alternateTitle (which I use for the atomic number) at different positions within the button cell.

I've begun to experiment, however, with the concept of using an attributed string for the title, which would allow me to remove my positioning methods. Would the creation and manipulation of an NSMutableAttributedString be slower than actually drawing the string myself?

Take care,
Andrew
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