在 Sat, 13 Aug 2005 23:05:58 +0800，Howard M. Lewis Ship (JIRA)
<[email protected]> 写道:
[ http://issues.apache.org/jira/browse/TAPESTRY-554?page=all ]
Howard M. Lewis Ship closed TAPESTRY-554:
-----------------------------------------
Fix Version: 4.0
Resolution: Fixed
To make use of this feature, you need to add a little JavaScript:
document.forms.myform.events.invalid_field_handler = function(event,
field, message)
{
. . .
}
The event is the FormSubmitEvent
The field is the DOM object for the field being validated
The message is the message to present to the user
That's great!
Hook needed on client side to control how validation errors are
presented to the user
-------------------------------------------------------------------------------------
Key: TAPESTRY-554
URL: http://issues.apache.org/jira/browse/TAPESTRY-554
Project: Tapestry
Type: Improvement
Components: Framework
Versions: 4.0
Reporter: Howard M. Lewis Ship
Assignee: Howard M. Lewis Ship
Fix For: 4.0
Right now, client-side JavaScript functions such as required() and
validate_min_length() invoke a method handle_invalid_field().
handle_invalid_field() calls window.alert() to display the message,
then sets event.abort and event.cancelListeners.
event.cancelListeners is important, otherwise each invalid field will
raise the alert window!
However, if you can imagine a much more sophisticated scheme, where we
use DHTML to update the page and display errors as HTML (rather than a
popup window) .... then we need a way to hook handle_invalid_field(),
so that we can perform a different operation.
My first thought was that we could simply provide an overriding
implementation of the function ... however, that doesn't handle cases
where a page has multiple forms.
My thoughts are to add a method to FormSubmitEvent for alterting the
user about errors; this would delegate to a function provided by
FormEventManager. This function could be set by a Script's
<initilaization> block.
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