Custom sheet for NSFormatter errors

FROM : Michael Varlik
DATE : Sat Feb 02 20:13:21 2008

Hi,

when my NSFormatter subclass fails to validate a value the
-getObjectValue:forString:errorDescription: error method returns NO and a sheet is automatically presented which asks to ether discard the input or accept it.
How can I replace this sheet with a custom sheet or automatically perform the "discard" action without displaying a sheet at all?

Any suggestions?

Best regards,
Michael
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