On Wed, Dec 21, 2011 at 12:17 PM, Adrian Wiesmann <awiesm...@somap.org> wrote:
> On 12/21/11 11:05 AM, Martin Grigorov wrote:
>
>>>> org.apache.wicket.WicketRuntimeException: The component(s) below
>>>> failed to render. A common problem is that you have added a component
>>>> in code but forgot to reference it in the markup (thus the component
>>>> will never be rendered).
>>
>>
>> This error means that Wicket sees these components only in the Java
>> component tree but doesn't see them in the markup tree.
>> How exactly do you pass the generated markup to Wicket ?
>
>
> Let's have a simple example:
>
> Simple layout/UI in XML:
>
> <frame>
> <actionbox DataBinding="@Inventory[0]">
> <fop-action enabled="true" />
> </actionbox>
>
> <list DataBinding="@Inventory[0]">
> <field DataBinding="name"/>
> </list>
> </frame>
>
> Which is read and converted into an in-memory object tree:
>
> frame
> actionbox
> fop-action
> ...
>
> This is then taken and Wicket classes are instantiated for every in-memory
> object.
>
> In the constructor of every class (depending on its nature) there is code to
> build the Wicket based object structure. Something like this:
>
>
> ListView<ObjectBase> listView = new ListView<ObjectBase>("eachGuiElem",
> formRoot.getChildren())
> {
> @Override
> protected void populateItem(ListItem<ObjectBase> item)
> {
> ObjectBase ob = item.getModelObject();
>
> item.add(getPanelFromObjectBase("cell", ob, model, form));
> }
> };
>
> With that html content:
>
> ...
> <tr wicket:id="eachGuiElem">
> <td style="border:0px;margin:0px;padding:0px;" wicket:id="cell"></td>
> </tr>
> ...
>
> Where getOPanelFromObjectBase contains something like this:
>
> protected Panel getPanelFromObjectBase(String id, ObjectBase ob, IModel<?>
> model, final Form<?> form)
> {
> if (ob.getClass().equals(GListAndDetail.class))
> {
> return new GWListAndDetail(id, model, (GListAndDetail) ob,
> form);
> }
> else if (ob.getClass().equals(GActionBox.class))
> {
> return new GWActionBox(id, model, (GActionBox) ob, form);
> }
> ...
>
> All classes starting with GWxxx are subclasses of Wicket Panels.
>
> Every GWxxx class has an HTML file with the same name and the ending html in
> the same directory as the class file. So Wicket should be able to find the
> right markup. And with the right markup it should be able to render not only
> the object tree but also the html representation.
All this looks OK.
Can you paste the ids of the components which cannot be rendered ?
>
>
>
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--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com
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