Rendering parameter docs for events too.

      @column_title = "Event"

      @row_class = "method-row"

      @short_params = ShortParams.new

      @long_params = LongParams.new(@cls)

    end

    def signature_suffix(item)

      " : " + @short_params.render(item[:params])

    end

    def extra_doc(item)

      [

        "<div class='mdetail-params'>",

        "<strong style='font-weight: normal;'>Listeners will be called with the following arguments:</strong>",

        @long_params.render(item[:params]),

        "</div>"

      ].join("\n")

    end

  end

end