从子窗口小部件调用面板的add方法

Question

I have created a Composite widget comprising of a TextBox and a Button. What I am trying to implement here is that another instance of this widget be added to its parent vertical panel on entering text in the TextBox of widget. To achieve that I've tried following:

public void onKeyPress(KeyPressEvent event){
    if(event.getSource() == optionBox && optionCount>=2){
        getParent().add(new OptionWidget(optionCoutn+1));
    }
}

But I am getting an error:That "symbol: method add(Widget)" cannot be found in Widget class. From which it is obvious that add method from VerticalPanel class is not being called here.

I've added two instances of this widget to VerticalPanel using UiBinder template.

What should I do to call VerticalPanel's add method ?

Answer 1

Convert the result of getParent to VerticalPanel

VerticalPanel ParentPanel=(VerticalPanel)getParent();
ParentPanel.add(new OptionWidget(optionCoutn+1));