CODEWITHSUNDEEP
gwtdependency-injectionguicegwt-gingwt-platform
quarks
quarks

Reputation: 35276

Error binding view to presenter?

I'm getting this error when running GWT application:

java.lang.AssertionError: This UIObject's element is not set; you may be missing a call to either Composite.initWidget() or UIObject.setElement()

public class MainView extends Composite implements HeaderPresenter.MyView {
  // Code omitted
}

In the Gin ClientModule.java configure() function I have this code:

bindPresenter(HeaderPresenter.class, HeaderPresenter.MyView.class,
                MainView.class, HeaderPresenter.MyProxy.class);

In the view class the initWidget() is properly called and passed with a widget, what could be causing the error?

Upvotes: 1

Views: 2246

Answers (2)

Sydney
Sydney

Reputation: 12212

This is how I create a Composite that I will use later in a View.

public class MyCustomBox extends Composite {

    private static MyCustomBoxUiBinder uiBinder = GWT.create(MyCustomBoxUiBinder.class);

    interface MyCustomBoxUiBinder extends UiBinder<Widget, MyCustomBox> {
    }

    public MyCustomBox() {
        initWidget(uiBinder.createAndBindUi(this));
    }
}

Upvotes: 3

Colin Alworth
Colin Alworth

Reputation: 18331

This error occurs when UIObject.setElement isn't called. If you are calling Composite.initWidget with a non-null widget, make sure that that widget is setting its own element correctly. If this is a standard GWT widget, it should be doing that, but otherwise it is possible that the widget passed to initWidget isn't set up correctly.

Upvotes: 3

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