|Perl: the Markov chain saw|
TK Entry - Validating Inputby Dirk80 (Monk)
|on Mar 06, 2013 at 13:53 UTC||Need Help??|
Dirk80 has asked for the
wisdom of the Perl Monks concerning the following question:
I want to validate the input of an entry widget. Only positive hexadecimal digits shall be allowed.
Here my code:
After the input of a valid character I can never remove it again. The first character is always there then. In the dumped output I can see that the character should be gone, but it is still visible in the entry.
Am I doing something wrong? Is it a bug?
Thanks alot for your help.