How do i find out which GWT element has focus?

Question

I would like to find out, in GWT, which element currently has focus. Basically i was working on virtual keyboard in our application. All keys are working fine except tab key

Answer 1

Short template:

public class IntBox extends com.google.gwt.user.client.ui.IntegerBox {

private boolean focused=false;

public IntBox(){

        addFocusHandler(new FocusHandler() {

            @Override
            public void onFocus(FocusEvent event) {
                focused=true;
            }
        });

        addBlurHandler(new BlurHandler() {

            @Override
            public void onBlur(BlurEvent event) {
                focused=false;
            }
        });

    }

    public boolean isFocused() {
        return focused;
    }

}