def main(self, standalone=False):
        """Create interactive browser window.

        keyword arguments
        standalone -- Set to true, if the browser is not attached to other
        windows

        """
        window = _Tkinter.Tk()
        sc = _TreeWidget.ScrolledCanvas(window, bg="white",\
                                       highlightthickness=0, takefocus=1)
        sc.frame.pack(expand=1, fill="both")
        item = _ReferrerTreeItem(window, self.get_tree(), self)
        node = _TreeNode(sc.canvas, None, item)
        node.expand()
        if standalone:
            window.mainloop()