chekbox - allow only 5 selected
Hi, I have CheckGroupUser group = new CheckGroupUser(usersGroup, list); and in repeater I add checkbox: item.add(new CheckUser(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). Could help me, how can I do it? Thanks. -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/chekbox-allow-only-5-selected-tp4650340.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: chekbox - allow only 5 selected
On Tue, Jul 3, 2012 at 12:09 PM, Dan12321 wee...@centrum.cz wrote: Hi, I have CheckGroupUser group = new CheckGroupUser(usersGroup, list); and in repeater I add checkbox: item.add(new CheckUser(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*
Re: chekbox - allow only 5 selected
You can assign AjaxFormChoiceComponentUpdatingBehavior to the group and check its model object's size in #onUpdate() But this will fire Ajax requests for each and every click on the checkboxes. On Tue, Jul 3, 2012 at 7:09 PM, Dan12321 wee...@centrum.cz wrote: Hi, I have CheckGroupUser group = new CheckGroupUser(usersGroup, list); and in repeater I add checkbox: item.add(new CheckUser(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). Could help me, how can I do it? Thanks. -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/chekbox-allow-only-5-selected-tp4650340.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: chekbox - allow only 5 selected
Hi! As the first A in AJAX stands for Asynchronous, you may hit weird results with this solution, especially on slow internet connection. Which means that no one guarantees that if user clicks checkbox1 and then checkbox2 answers would arrive in such a manner. What I would do in this case - I would just write a very simple JQuery callback which would listen to checkbox check/uncheck events and would disable remaining checkboxes once 5 are selected, plus show warning. It is synchronous, immediate, and the rule - max 5 - seems to be easy to employ on the client side. Surely we need to leave the check for 'max 5' in the onsubmit validator as we want it to be independent of the javascript. Regards, Alex. 2012/7/3 Martin Grigorov mgrigo...@apache.org You can assign AjaxFormChoiceComponentUpdatingBehavior to the group and check its model object's size in #onUpdate() But this will fire Ajax requests for each and every click on the checkboxes. On Tue, Jul 3, 2012 at 7:09 PM, Dan12321 wee...@centrum.cz wrote: Hi, I have CheckGroupUser group = new CheckGroupUser(usersGroup, list); and in repeater I add checkbox: item.add(new CheckUser(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). Could help me, how can I do it? Thanks. -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/chekbox-allow-only-5-selected-tp4650340.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- Alexander Cherednichenko [ the only way out is the way up ]
Re: chekbox - allow only 5 selected
On Tue, Jul 3, 2012 at 9:24 PM, Alexander Cherednichenko lex...@gmail.com wrote: Hi! As the first A in AJAX stands for Asynchronous, you may hit weird results with this solution, especially on slow internet connection. Which means that no one guarantees that if user clicks checkbox1 and then checkbox2 answers would arrive in such a manner. Wicket serializes the Ajax requests both at the client and at the server side, so there is a guarantee that request1 is processed before request2. You can disable the client side queueing by overriding ajax behavior's #getAjaxChannel() method though. What I would do in this case - I would just write a very simple JQuery callback which would listen to checkbox check/uncheck events and would disable remaining checkboxes once 5 are selected, plus show warning. It is synchronous, immediate, and the rule - max 5 - seems to be easy to employ on the client side. Surely we need to leave the check for 'max 5' in the onsubmit validator as we want it to be independent of the javascript. I agree that client side checks will be much better for the user experience. Regards, Alex. 2012/7/3 Martin Grigorov mgrigo...@apache.org You can assign AjaxFormChoiceComponentUpdatingBehavior to the group and check its model object's size in #onUpdate() But this will fire Ajax requests for each and every click on the checkboxes. On Tue, Jul 3, 2012 at 7:09 PM, Dan12321 wee...@centrum.cz wrote: Hi, I have CheckGroupUser group = new CheckGroupUser(usersGroup, list); and in repeater I add checkbox: item.add(new CheckUser(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). Could help me, how can I do it? Thanks. -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/chekbox-allow-only-5-selected-tp4650340.html Sent from the Users forum mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org -- Alexander Cherednichenko [ the only way out is the way up ] -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
