You could have a look at the "broadcaster" that is discussed in
https://issues.apache.org/jira/browse/WICKET-1312
The solution that is proposed there uses a visitor instead of
registration. That has the advantage that you don't have to
_unregister_ at the appropriate time. Because Wicket does not have
lifecycle management of components you would have to do this by hand.
Of course, if your components are never replaced, this is not an issue.
cheers, Frank
On Thu, 2008-05-08 at 18:15 -0700, Scott Swank wrote:
> e.g.
>
> public class AjaxEvent
> {
> private Set<Component> listeners = new HashSet<Component>();
>
> public void register(Component listener)
> {
> listeners.add(listener);
> }
>
> public void fire(AjaxRequestTarget request)
> {
> for (Component listener : listeners)
> request.addComponent(listener);
> }
> }
>
> On Thu, May 8, 2008 at 6:07 PM, Scott Swank <[EMAIL PROTECTED]> wrote:
> > > Ajax
> > >
> > > 3. Now im working with more Ajax. What is a good inter component
> > > communication scheme? Swing has its listeners, but in wicket i tend to
> > call
> > > methods on dependent components from ajax event handlers. Is this a good
> > > approach - (it atleast dont feel so good)?
> >
> > I try to have my components just be a view of their model. Then it's
> > just a matter of setting the model(s) appropriately and refreshing the
> > components.
> >
> > Alternately, create a AjaxEvent class that you subclass to represent
> > each of the actions in which you're interested. Put a collection of
> > those on your Page. Then have allow each component to register itself
> > as a listener of an event. Then an ajax call would result in
> > SomeAjaxEvent.fire(AjaxTargetRequest) and that would in turn call
> > addComponent() for each registered listener component.
> >
> > - Scott
> >
>
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