Page: http://wiki.cocoondev.org/Wiki.jsp?page=WoodySample , version: 2 on Tue
Jul 15 14:36:33 2003 by BrunoDumon
- A field widget can be associated with a datatype. The function of the
datatype is to convert the string value entered by the user to a more specific
type like a number or a date (and vice versa, convert them back to strings).
The datatype will also perform the validation. (This split-up between "widget"
and "datatype" is specific for the field widget -- it is perfectly possible to
make widgets that have nothing to do with datatypes). In this way, a field
widget contains strongly-typed data. For example, if you associated a "long"
datatype with a field widget, then you can be sure that when you retrieve the
widget's value, you will get a Long object (that is, if the form was validated
successfully).
+ A field widget can be associated with a datatype. The function of the
datatype is to convert the string value entered by the user to a more specific
type like a number or a date (and vice versa, convert them back to strings)
(this part is now delegated to a seperate object: a Convertor). The datatype
will also perform the validation. (This split-up between "widget" and
"datatype" is specific for the field widget -- it is perfectly possible to make
widgets that have nothing to do with datatypes). In this way, a field widget
contains strongly-typed data. For example, if you associated a "long" datatype
with a field widget, then you can be sure that when you retrieve the widget's
value, you will get a Long object (that is, if the form was validated
successfully).
?
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
