You could do your validation within an action bean and raise the event within the code. for instance in a value change listener.
it could work, but when the validation fails, value change listener isn't fired
I am interested in having such an event too.
I want to do some custom styling after validation, maybe some red borders or stars next to fields that failed validation.
OnError event for example is triggered on ajax error. We need events for validation errors. Cannot find any mention of such thing existing. Is there a way of manually going over controls to see which failed validation?