As per the JavaDocs:
http://ci.apache.org/projects/wicket/apidocs/1.5.x/org/apache/wicket/ajax/markup/html/form/AjaxFallbackButton.html#onSubmit(org.apache.wicket.ajax.AjaxRequestTarget,
org.apache.wicket.markup.html.form.Form)
Callback for the onClick event. If ajax failed and this event was generated
via a normal submission, the target argument will be null
*Parameters:*target - ajax target if this linked was invoked using ajax,
null otherwise
I belive your target is null because you are using a fallback button and
you might have JavaScript turned off in your browser?
~ Thank you,
Paul Bors
On Fri, Feb 15, 2013 at 5:42 AM, Alex <avat...@yahoo.com> wrote:
> As I understand the only way to catch the form's onSubmit is by analyze
> form
> components validation which is performed by form submitting. And if
> validation is successful then form submit will be done for sure. Am I
> correct understand?
>
> Trying to find workaround for this issue,in MyCustomBehavior I found form's
> button and added AjaxEvenBehavior("onclick") to it. Strangely but
> form.getDefaultButton() returned null and the only way to get form's Button
> component is the traversing over all the form components and finding a
> button component (not sure if it best way). So when I clicked the button
> the
> AjaxEventBehavior.onEvent occurs (in MyCustomBehavior) and next
> AjaxFallbackButton.onSubmit on main form had invoked. But I found that the
> target parameter is null in main onSubmit handler of form's
> AjaxFallbackButton. What wrong in this case? Why the target is null in
> form's buton handler and not null in the form Behavior's button handler.
> This is the same button in fact. In the form it have onSubmit handler, and
> in MyCustomBehavior it have onEvent handler. A piece of code is given
> below...
> Thanks a lot for help.
>
> public class MyCustomBehavior extends AbstractBehavior {
> ......
> @Override
> public void onConfigure(Component component) {
> // this.form.getDefaultButton() - return null in fact (why)
>
> Iterator<? extends Component> iter = form.iterator();
> while (iter.hasNext()) {
> FormComponent<?> fc =
> (FormComponent<?>)iter.next();
> if (fc.isEnabled() && (fc instanceof Button)) {
> fc.add(new AjaxEventBehavior("onclick") {
> private static final long
> serialVersionUID = 1L;
>
> @Override
> protected void
> onEvent(AjaxRequestTarget target) {
> // here target is not null
>
> System.out.println("clicked !!!!");
> }
> });
> };
> } // end of while
> } // end of onConfigure
> ....
> }
>
> // Main page
> ....
> form.add(new AjaxFallbackButton("submit",form) {
> protected void onSubmit(AjaxRequestTarget target, Form<?>
> aForm) {
> // here target is null (why?)
> .....
> // some main actions for form submit...
> }
> });
> .....
> form.add(new MyCustomBehavior(feedback));
> .......
> // End of main page
>
>
>
> -----
> Best wishes,
> Alex.
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/Several-Form-onSubmit-is-it-possible-add-via-AbstractBehavior-tp4656347p4656393.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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