> public abstract class TestForm extends WebPage {
>
> public TestForm() {
> add(new Label("myDiv", "my div from test form")); => common to
> every
> concrete page
> add(createDivWithComponent("myNewPanel")); => has to be
> redefine by
> each concrete page
> add(createDivWithComponent2("myNewPanel2")); => has to be
> redefine
> by each concrete page
>
> }
>
> protected abstract WebMarkupContainer createDivWithComponent(String
> divId);
>
> protected abstract WebMarkupContainer
> createDivWithComponent2(String
> divId);
> }
An alternative is to have these either provide default/null components or throw
WicketRuntimeExceptions.
>
> <body>
>
> <div wicket:id="myNewPanel"></div>
> <div wicket:id="myNewPanel2"></div>
> </body>
>
> protected WebMarkupContainer createDivWithComponent2(String divId)
> {
> WebMarkupContainer container = new WebMarkupContainer(divId);
> WebMarkupContainer container2 = new WebMarkupContainer("div1");
> container2.add(new Label("label2","My very good label 2"));
> container.add(container2);
> return container;
> }
>
> }
>
> <body>
>
> <div wicket:id="myNewPanel"></div>
> <div wicket:id="myNewPanel2"></div>
> </body>
That markup is missing the "div1" and "label2" markup, but it does not get that
far because
> And this is the error message I get : WicketMessage: 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).1. [Component id = myDiv]
... this means that there is no markup for the component you added at the start
of the parent constructor:
add(new Label("myDiv", "my div from test form"));
- Tor Iver
