On Apr 23, 2009, at 2:25 PM, Lee Ann Rucker wrote:
It is not your only choice, but it is probably the best choice.
Another poster suggested using isPartialStrignValid of the formatter,
but I have tried this in the past and run into undo issues,
particularly when using it to "filter" input. The problem is that
undo
registration happens before the validation call, and somehow the
"undo
typing" feature remembers the string, so when you change the string
in
the validator method, and then undo, you can get add results and out-
of-bounds exceptions. Since then I haven't looked into why this
happens and how to get around it, if at all possible.
There's no workaround. I tried writing my own Undo handler, but as
you've discovered the changes happen before there's a chance to
handle them.
Formatters work, and bindings work, but the combination doesn't. The
only solution I've found is to use a formatter without bindings,
since having the formatter is more important than having bindings,
useful as they may be.
Just to be clear, are you saying that you can do field filtering with
a formatter, with appropriate undo support, without bindings, or are
you making a general remark about difficulties when using bindings
with formatters?
Thx,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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