GWT Textbox Dialog

import com.google.gwt.user.client.ui.TextBox;
import java.util.function.BiConsumer;

public class TextBoxDialog extends OkCancelDialog<TextBox> { // see https://pastebin.com/e3ThyE40
    public TextBoxDialog(String title, String defaultValue, BiConsumer<TextBox, OkCancelDialog<TextBox>> onClick) {
        super(title, new TextBox(), onClick);
        widget.setText(defaultValue);
    }

    @Override
    public void show() {
        super.show();
        widget.selectAll();
    }
}