public interface RendererCtrl
Listboxuse to notify the renderer for several circumstance.
ListitemRenderer.render(org.zkoss.zul.Listitem, T, int) is called one item a timer,
a request might have several items to render. And, if the renderer
implements this interface,
doTry() will be called before
any rendering, and
doFinally() will be called after all rendering.
If any exception occurs,
doCatch(java.lang.Throwable) will be called.
A typical use is to start a transaction and use it for rendering all items from the same request.
|Modifier and Type||Method and Description|
Called if any exception occurs when rendering items.
Invoked after all rendering are done successfully or an exception occurs.
Called before rendering any item.
Example, you could start an transaction here.
void doCatch(java.lang.Throwable ex) throws java.lang.Throwable
If this method doesn't throw exception, ex is 'eaten' though rendering is terminating. Thus, if you want to bubble up the exception, you could throw it again.
Example, you could roll back the transaction.
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