Problem with custom widget

[smitzkus]

Hi,

i want to write a custom widget that extends HBoxLayoutContainer and consists of a label, a spinner and a button. The problem is, when i add that custom widget to an instance of HorizontalLayoutContainer, my widget becomes not visible. I guess this is due to the fact that the pixel-size of my widget after constructing is 0. Is it possible to force calculating and set the pixel in constructor?

Here the code of my custom widget:

public class Custom extends HBoxLayoutContainer {

    public Custom() {
        setHBoxLayoutAlign(HBoxLayoutAlign.MIDDLE);
        
        Label label = new Label("Label");
        SpinnerField<Integer> spinner = new SpinnerField<Integer>(new IntegerPropertyEditor());
        TextButton b = new TextButton("Button");

        add(label);
        add(spinner);
        add(b);
    }
}

And here how i use it:

public class Test implements EntryPoint {

    @Override
    public void onModuleLoad() {
        Custom c = new Custom();
        
        HorizontalLayoutContainer container = new HorizontalLayoutContainer();
        container.add(c);
        
        RootPanel.get().add(c);
    }
}