hi,
this really is weird. Can you post a quick start project that
demonstrates the behavior?
-Matej
On 3/23/07, Isaac Weng <[EMAIL PROTECTED]> wrote:
> Hi,
> This is my first time asking questions here.
> Hope I can make my question clear.
>
> I'v tried to extend the ajax tree in the wicket extension. The only
> modification I made is the output value, which is a customized panel
> instead of a label. Following are my html and source.
>
> MyTree.html :
>
> <span wicket:id="indent"></span><a wicket:id="link"><span
> wicket:id="image"/></a>
> <a wicket:id="nodeLink"><span class="icon"
> wicket:id="icon"></span><span wicket:id="myPanel" />
>
> To simplify the problem, I strip most markups of MyPanel.html to
> what I think causing the problem.
> MyPanel.html :
>
> <span wicket:id="outputList"><span
> wicket:id="outputName">name</span></span>
>
> MyPanel.java :
>
> public MyPanel extends Panel
> {
> public MyPanel(String id)
> {
> super(id);
> ArrayList<String> list = new ArrayList<String>();
> list.add("name1");
>
> add(new ListView("outputList", list)
> {
> public void populateItem(final ListItem item)
> {
> final String name = (String) item.getModelObject();
> item.add(new Label("outputName", name));
> }
> });
> }
> }
>
> The problem is while I click the junction link,
> ListView.renderItem() throws a NullPointerException. After some digging,
> I found that the ListItem is null. Then I use getList(), and it
> successfully return the list I passed in and the values in that list are
> also correct, however the ListItem is null which I don't know why.
>
> Thanks for reading my question. I will appreciate any suggestions.
>
> Isaac
>
>
>
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