Yeah that's what I thought. And I tried it, but visually nothing
happened. I'll give it another shot.
Sent from my iPhone
http://friendfeed.com/astubbs
On 31/05/2009, at 7:15 AM, Igor Vaynberg <[email protected]>
wrote:
you can just replace the entire panel with a new instance.
-igor
On Sat, May 30, 2009 at 3:11 AM, Antony Stubbs <[email protected]
> wrote:
We use AjaxLazyLoadingPanel, and want to be able to trigger the
process of
showing the indicator, and requesting the panels contents with a
separate
Ajax request, after the first complete render has finished. I.e. do
the
whole process over and over, without having to reload the entire
page.
I came up with this, which I was surprised actually worked first
try :)
gotta love Wicket.
But perhaps there's a better way to do it ? A simpler way?
Something I'm
missing? I tried simply replacing the lazy loading panel with a new
instance
of one but that didn't seem to have an effect - I think the magic
is in the
adding a new AbstractAjaxBehaviour on each request.
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AbstractDefaultAjaxBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import
org.apache.wicket.extensions.ajax.markup.html.AjaxLazyLoadPanel;
import org.apache.wicket.markup.html.IHeaderResponse;
/**
* An {...@link AjaxLazyLoadPanel} extension which allows it to
* {...@link #restart(AjaxRequestTarget)} the process of showing the
loading
* indicator, then load it's contents using a separate Ajax request.
*
* @author Antony Stubbs
*/
abstract public class ReloadingAjaxLazyPanel extends
AjaxLazyLoadPanel {
private static final long serialVersionUID = 1L;
public ReloadingAjaxLazyPanel(String id) {
super( id );
}
/**
* Causes the {...@link AjaxLazyLoadPanel} to re-display the loading
indicator,
* then in a seperate ajax request, get it's contents.
*
* @param target
*/
public void restart(AjaxRequestTarget target) {
target.addComponent( this );
// replace panel contents with loading icon
Component loadingComponent = getLoadingComponent( "content" );
this.replace( loadingComponent );
// add ajax behaviour to install call back
loadingComponent.add( new AbstractDefaultAjaxBehavior() {
private static final long serialVersionUID = 1L;
@Override
protected void respond(AjaxRequestTarget target) {
Component component =
ReloadingAjaxLazyPanel.this.getLazyLoadComponent( "content" );
ReloadingAjaxLazyPanel.this.replace(
component.setRenderBodyOnly( true ) );
target.addComponent( ReloadingAjaxLazyPanel.this );
// setState((byte)2);
}
@Override
public void renderHead(IHeaderResponse response) {
super.renderHead( response );
response.renderOnDomReadyJavascript(
getCallbackScript().toString() );
}
} );
}
}
As you can see, there is duplication from AjaxLazyLoadingPanel -
which would
need re-factoring in order to remove. - no problem there.
But also, because the setState method is private, I can't use that
state
system.
Regards,
Antony Stubbs,
NZ
http://friendfeed.com/astubbs
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