I know IComponentOnBeforeRenderListener, but I cannot use this
interface, because I need to condition
the instantiation of the children of my component, depending of the
functionality of the Listener.
And if I use IComponentOnBeforeRenderListener, the instantiation has
been finished when the interface
is called.
The best moment to use this functionality is in the
IComponentInstantiationListener... because any children
have been still instantiated.
> There is now - since a few weeks - also
> org.apache.wicket.application.IComponentOnBeforeRenderListener, which
> may suit your needs better.
>
> We (Teachscape) use it like:
>
> public final class ValidationListener implements
> IComponentOnBeforeRenderListener {
>
> public void onBeforeRender(Component component) {
> if (component instanceof FormComponent && !component.hasBeenRendered()) {
> // add validators
> processComponent((FormComponent) component);
> }
> }
>
> and in our application's init method:
>
> addComponentOnBeforeRenderListener(new ValidationListener());
>
>
> Eelco
>
> On 6/18/07, Alberto Bueno <[EMAIL PROTECTED]> wrote:
>
>> Hi,
>>
>> I'm using IComponentInstantiationListener to add additional
>> functionality to my components. But in this listener I need to know the
>> model of the component to condition this functionality.
>> If we inspect the code, we can see that the listeners are called before
>> assigning the model to the component:
>>
>> public Component(final String id, final IModel model)
>> {
>> setId(id);
>> getApplication().notifyComponentInstantiationListeners(this);
>> this.model = wrap(model);
>>
>> final IDebugSettings debugSettings =
>> Application.get().getDebugSettings();
>> if (debugSettings.getComponentUseCheck())
>> {
>> setMetaData(CONSTRUCTED_AT_KEY, Strings.toString(this, new
>> MarkupException(
>> "constructed")));
>> }
>> }
>>
>> Are there any reason to do the notification in that moment?
>>
>> Thanks
>>
>>
>>
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