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From Vadim Gritsenko <va...@reverycodes.com>
Subject Re: Widget states: let's do it (was Re: CForms making widgets invisible)
Date Thu, 23 Sep 2004 15:12:52 GMT
Hunsberger, Peter wrote:

> why would you ever do validation on a field that the user cannot
> change?

There is an example. That's exactly how AggregateWidget works. It 
consists out of several visible widgets and one invisible (or vice versa 
- depending on direction). Invisible one gets value by aggregated values 
of visible fields, and then it can run its own validation. And there are 
scenarios when separate values are visible, but aggregated is not.

Similar things could be employed by application developers - and that's 
when they might use this invisible widget.

And even if widget is not visible by itself, you can always show it's 
validation errors.

Vadim


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