On Tue, Jul 3, 2012 at 12:09 PM, Dan12321 <wee...@centrum.cz> wrote: > Hi, > > I have CheckGroup<User> group = new CheckGroup<User>("usersGroup", list); > and in repeater I add checkbox: item.add(new Check<User>("checkboxUser", > group)); > > I have got 20 checkboxes, but I want to allow only 5 checkboxes select. > When > will be selected more than 5 checkboxes, it shows error (in feedback). > I want to check this when the checkbox is selected (not after submitting > form). >
It will require JavaScript, so I'd just make it an entirely client-side validation. Of course, you'll still want the server-side validation to mirror it for when the form is submitted - potentially with forced values or JS disabled. -- Jeremy Thomerson http://wickettraining.com *Need a CMS for Wicket? Use Brix! http://brixcms.org*