commit: caret on-screen logic

From: Tomas Frydrych (tomas@frydrych.uklinux.net)
Date: Sat Jan 18 2003 - 08:26:01 EST

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I have implemented partial on-screen logic for the caret class; it only
checks for negative coordinances, i.e., carret left of and/or above
the editing window. This should take care of the warnings Dom
reported (let me know if the caret past the right/bottom edge of the
screen causes similar problems).

files: gr_Caret.h/cpp

Tomas

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