@UiHandler : Required to delegate handlers?

I have a class which extends the GXT ComboBox :

public class RemoteCombo<Row> extends ComboBox<Row> {
    ...
}

Later, I use it in some code :

@UiField(provided = true)
RemoteCombo<Town> town;

@UiHandler("town")
public void onTownValueChanged(ValueChangeEvent<Town> event) {
  ...
}

I get the following error :

[ERROR] Field 'town' does not have an 'addValueChangeHandler' method associated.

This is false because town is a RemoteCombo, RemoteCombo extends ComboBox, ComboBox has this method.

If I delegate this method in RemoteCombo.java, it works :

public HandlerRegistration addValueChangeHandler(ValueChangeHandler<Row> handler){
  return super.addValueChangeHandler(handler);
}

Nevertheless, I find weird that I have to delegate every method that I need to use with @UiHandler. Do I do something wrong or is it a bug?

Solution

I think, you are doing right.

Take a look at what Colin Alworth wrote (at the end of the thread).

and here: