GWTP ViewWithUiHandlers: uiHandlers are not set. Did you call getUiHandlers() from your view's constructor? in PresenterWidget

I have problem that I do not understand. I think I've done what I supposed to do, but it dosnt work.

I cannot executed presenter methods from view using ui handlers. Error says that I did not set ui handlers but I did:

@Inject
FileUploaderPresenter(EventBus eventBus, MyView view, PlaceManager placeManager) {
   super(eventBus, view);
   getView().setUiHandlers(this);
   this.placeManager = placeManager;
}

and

public FileUploaderView() {
   super();
   this.getUiHandlers();
   this.initWidget(uploader);
}

But I am getting an error:

com.gwtplatform.mvp.client.ViewWithUiHandlers
SEVERE: uiHandlers are not set.  Did you call getUiHandlers() from your view's constructor?

For sure I will post all my classes related:

public class FileUploaderModule extends AbstractPresenterModule {
    @Override
    protected void configure() {
        bindSingletonPresenterWidget(FileUploaderPresenter.class, FileUploaderPresenter.MyView.class, FileUploaderView.class);
    }
}

---

public class FileUploaderPresenter extends PresenterWidget<FileUploaderPresenter.MyView> implements FileUploaderUiHandlers {
    interface MyView extends View, HasUiHandlers<FileUploaderUiHandlers> {
    }

    PlaceManager placeManager;

    @Inject
    FileUploaderPresenter(EventBus eventBus, MyView view, PlaceManager placeManager) {
    super(eventBus, view);
        getView().setUiHandlers(this);
    this.placeManager = placeManager;
    }

    @Override
    protected void onBind() {
    super.onBind();
    }

    @Override
    public void onOk() {
    Routing.Redirect.toLoginPage(placeManager);
    }

    @Override
    public void onUnauthorized() {
    Routing.Redirect.toLoginPage(placeManager);
    }

}

---

interface FileUploaderUiHandlers extends UiHandlers {
    void onUnauthorized();

    void onOk();

}

---

public class FileUploaderView extends ViewWithUiHandlers<FileUploaderUiHandlers> implements FileUploaderPresenter.MyView {

    MaterialFileUploader uploader = new MaterialFileUploader();

    public FileUploaderView() {
        super();
        this.getUiHandlers();
        this.initWidget(uploader);
        MaterialUploadLabel label = new MaterialUploadLabel();
        label.setTitle("Put Your's files here and here");
        label.setDescription("Some description here");
        uploader.add(label);
        uploader.setMaxFileSize(10000000);
        uploader.setUrl(ServiceRouting.FULL_SERVICE +           ServiceRouting.FileService.upload);
    addHandlers();
    }

    private void addHandlers() {
    uploader.addUnauthorizedHandler(new UnauthorizedHandler<UploadFile>() {
        @Override
        public void onUnauthorized(UnauthorizedEvent<UploadFile> event) {
        GWT.log("UnauthorizedEvent (" + event.getTarget().getName() + " | " + event.getResponse().getCode() + " | " + event.getResponse().getMessage() + "|" + event.getResponse().getBody()
            + ")");
        MaterialToast.fireToast("Redirect to login page");
        getUiHandlers().onUnauthorized();
        }
    });
}

I instantialize this widget with: FileUploaderView()

Is this error happens, cause I don't use uiBinder? This is my first PresenterWidget. Maybe it should be done differently from standard Presenter. Any help appreciated.

Alright, I've figure it out on my own.

The problem is that This Presenter/View pair is a widget. So it should be instantialize with slot mechanism of gwtp. And to do this we use bind method with Presenter class parameter (not view like I was doing).

@Inject UploaderPresenter fileUploaderPresenter;

@Override
protected void onBind() {
    super.onBind();
    setInSlot(SLOT_FILE_UPLOAD, fileUploaderPresenter);
}

Here is documentation:

http://dev.arcbees.com/gwtp/tutorials/tutorial-part2.html

sections:

• Binding the PresenterWidget
• Set in slot
• Bind Slot

http://dev.arcbees.com/gwtp/core/presenters/