Is Tk::Draw a valid name for this module? Too general?

Yup, its too general, maybe Tk::Canvas::MouseDraw? MouseTrap? MouseRecord?

Is this functionality useful enough to submit to CPAN?

Sure

Do the "styles" of drawing allowed (eg. "free", "line", "oval", "circle", "rectangle") cover enough of the most commonly required drawing methods?

Its a good start, but since Canvas doesn't have too many types you should include them all :)

In reply to Re: RFC: A Tk module to simplify drawing - Tk::Draw by Anonymous Monk
in thread RFC: A Tk module to simplify drawing - Tk::Draw by liverpole

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