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Keeping track of new user selections in NSTextView



    Hello all,

 I'm looking for a  method in NSTextView
that gets triggered exactly when the user selects a portion of text
(and it gets colored blue ...). I thought
at first that the delegate method

 -(void) textViewDidChangeSelection:(NSNotification*)aNotification

 was what I needed, but after toying with it in the debugger I saw
little difference with -textDidChange: -textViewDidChangeSelection is
called just about every time
the user modifies the text. It seems that there always is
a "default" selection even when the user has actually selected nothing. So
where is
the method I need ?


             Ewan



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