Page History

...

Let's see an example:

Parent.java:

   public class Parent extends Component {}

Parent.html:

   ... parent content ...

      <wicket:child/>

   ... parent content ...

Child.html

   <wicket:extend>

      ... child content ...

   </wicket:extend>

Child.java:

   public class Child extends Parent {}

Renders as:

   ... parent content ...

      ... child content ...

   ... parent content ...

It is just like having a Panel defined in your Component class markup, and let subclasses add the Panel. But it doesn't need an extra Component and is much easier to use. Markup Inheritance is also a convenient replacement for most Border components.

...