I meant something like:
=======================
import org.apache.wicket.Component;
import org.apache.wicket.markup.html.panel.Panel;
public abstract class CondiotionalPanel extends Panel {
private static final long serialVersionUID = 1L;
public CondiotionalPanel(String id) {
super(id);
setOutputMarkupId(true);
}
@Override
protected void onBeforeRender() {
if(getContidion())
addOrReplace(onTrueState("child"));
else
addOrReplace(onFalseState("child"));
super.onBeforeRender();
}
protected abstract Component onTrueState(String id);
protected abstract Component onFalseState(String id);
protected abstract boolean getContidion();
}
============================
ConditionaPanel.html
<html
xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd";>
<body>
<wicket:panel>
<div wicket:id="content"></div>
</wicket:panel>
</body>
</html>
================================
CondiotionalPanel condionalPanel= new CondiotionalPanel("myid"){
private static final long serialVersionUID = 1L;
@Override
protected Component onFalseState(String id) {
return new EmptyPanel(id);
}
@Override
protected Component onTrueState(String id) {
return new MyTablePanel(id);
}
@Override
protected boolean getContidion() {
return tableHasElements;
}
};
when you update this panel (condionalPanel) via AJAX request target.
Ernesto
On Wed, Jun 30, 2010 at 3:44 PM, Ernesto Reinaldo Barreiro
<[email protected]> wrote:
> Hi Steve,
>
> I would do the following (which might not be the best solution;-):
>
> 1- Create panel "EmptyOrTablePanel" with setOutputMarkupId(true);
> 2- and then have a child of this panel that either displays an
> EmptyPanel or your table: depending on whether you have records or
> not. You could determine that on the onBeforeRender of
> "EmptyOrTablePanel"panel and use addOrReplace to put the table or the
> EmptyPanel.
> 3- Just tell this panel to update itself after AJAX operations.
>
> Best,
>
> Ernesto
>
> On Wed, Jun 30, 2010 at 3:29 PM, Steve Hiller <[email protected]> wrote:
>> Hi All,
>>
>> I have what seems like a strange problem with refreshing a DataView.
>>
>> I have a WebMarkupContainer that contains a DataView.
>> The DataView uses a SortableDataProvider as its DataProvider.
>> The WebMarkupContainer uses the DataView's SortableDataProvider
>> to determine if there are any items to be displayed within the DataView.
>> If there any items then the WebMarkupContainer's isVisible() method
>> returns true, and therefore the WebMarkupContainer and DataView should
>> be rendered.
>>
>> I am also using a ModalWindow to add new items to the DataView.
>> On exiting from the ModalWindow, I am using an AjaxRequestTarget
>> to refresh the WebMarkupContainer and therefore redraw the DataView
>> with the new item added to it.
>>
>> This all works fine IF there were already items in the DataView when
>> it was first rendered during the initial loading of its page.
>>
>> If the DataView is initially empty then the WebMarkupContainer
>> is not rendered as expected on page load. My issue is that adding new
>> items via the ModalWindow does not cause the WebMarkupContainer and
>> DataView to be rendered. Via debugging, I can see that the
>> WebMarkupContainer's isVisible() method is returning true yet nothing
>> appears.
>>
>> Any suggestions on resolving this issue would be appreciated.
>>
>> Thanks so much,
>> Steve
>>
>>
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