Cursor disappearing from TextBox

Hello,

Cursor is being disappeared from my TextBox and I am unable
to enter anything. Just have a look at this code once.

TextBox textBox = new TextBox();
SimplePanel panel = new SimplePanel();
panel.addStyleName("downarrow");
HorizontalPanel hPanel = new HorizontalPanel();
hPanel.add(textBox);
hPanel.add(panel);

FocusWidget widget = new FocusWidget(hPanel.getElement());

RootPanel.get().add(widget);

Now in the result I am getting a widget like a ListBox.
But when I want to enter anything in that TextBox cursor is being
disappeared in 1sec from that and I am unable to enter anything. Can
anybody suggest me for this problem.

Thanks,
Vara Kumar

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