Question

In Wicket, I’d like to subclass TextField form component to add additional markup around the tag.

Why I do not want to create a Panel:

1) I want the web page designer to use the input tag:
<input wicket:id="blah">

2) I don’t want the subclass to lose the FormField semantics in Java, e.g.:
field.setRequired(true);, etc.

I’m fine with hard-coding the wrapping markup in Java. But I’d like this to behave like a FormField in Java.

Any ideas? Looked around for examples, but stumped on this one

Edit:
I’m aware of Borders, but my issue with them is you have to add them in both the markup and in Java. For example:

<div wicket:id="border">
<input type="text" wicket:id="field"/>
</div>

—

FormComponent<Integer> field = new TextField<Integer>("field", new Model(1));
field.setRequired(true);
Border border = new MyBorder("border");
border.add(field);
form.add(border);

This makes the web page designer have to be aware of special markup, and the Java can’t be encapsulated (as a FormField subclass).

Answer 1

Ah, this is what I wanted via IBehavior:

My wrapper behavior (sorry for the Scala syntax):

class FieldWrapper extends AbstractTransformerBehavior {
  def transform(component: Component, output: CharSequence): CharSequence = """
<div class="blah">
  Blah blah blah  
  %s
</div>
""".format(output)
}

My subclass:

class MyField[T](id: String, model: IModel[T]) extends TextField[T](id, model) {
  add(new FieldWrapper)
}

Original Markup:

<input type="text" wicket:id="foobar"/>

Generated markup:

<div class="blah">
  Blah blah blah  
  <input type="text" value="" name="foobar" xmlns:wicket="http://wicket.apache.org">
</div>

Thanks S.O. for jumpstarting my mind 🙂