Using prepareFromRequest(PlaceRequest) from GWT presenter widget

Question

I am trying to get a URL parameter from a GWT presenter widget, but I am getting these error messages:

The method prepareFromRequest(PlaceRequest) of type ViewDiagramPresenter must override or implement a supertype method
The method prepareFromRequest(PlaceRequest) is undefined for the type PresenterWidget<ViewDiagramPresenter.MyView>

Any ideas? THANK YOU

public class ViewDiagramPresenter extends
        PresenterWidget<ViewDiagramPresenter.MyView> {
[...]

@Override
     public void prepareFromRequest(PlaceRequest placeRequest) {
       super.prepareFromRequest(placeRequest);
       String actionString = placeRequest.getParameter("action", "view");
    }
[...]
}

Answer 1

Inject the PlaceManager into your PresenterWidget and handle the url in the onReset() method.

public class ViewDiagramPresenter extends
        PresenterWidget<ViewDiagramPresenter.MyView> {

    protected final PlaceManager placeManager;

    @Inject
    public ViewDiagramPresenter(final EventBus eventBus, final MyView view, final MyProxy proxy, final PlaceManager placeManager) {
        super(eventBus, view, proxy);
        this.placeManager = placeManager;
    }

    @Override
    public void onReset() {
        super.onReset();
        PlaceRequest placeRequest = placeManager.getCurrentPlaceRequest();
        String actionString = placeRequest.getParameter("action", "view");
    }
}

Answer 2

The class PresenterWidget doesn't seem to have a method called prepareFromRequest(). Perhaps you mean to extend the Presenter class from gwtp?