# File tk/lib/tkextlib/tcllib/plotchart.rb, line 230
    def initialize(*args) # args := ([parent,] xaxis, yaxis [, keys])

                          # xaxis := Array of [minimum, maximum, stepsize]

                          # yaxis := Array of [minimum, maximum, stepsize]

      if args[0].kind_of?(Array)
        @xaxis = args.shift
        @yaxis = args.shift

        super(*args) # create canvas widget

      else
        parent = args.shift

        @xaxis = args.shift
        @yaxis = args.shift

        if parent.kind_of?(TkCanvas)
          @path = parent.path
        else
          super(parent, *args) # create canvas widget

        end
      end

      @chart = _create_chart
    end

# File tk/lib/tkextlib/tcllib/plotchart.rb, line 261
    def __destroy_hook__
      Tk::Tcllib::Plotchart::PlotSeries::SeriesID_TBL.delete(@path)
    end

# File tk/lib/tkextlib/tcllib/plotchart.rb, line 270
    def dataconfig(series, key, value=None)
      if key.kind_of?(Hash)
        tk_call_without_enc(@chart, 'dataconfig', series, *hash_kv(key, true))
      else
        tk_call_without_enc(@chart, 'dataconfig', series, 
                            "-#{key}", _get_eval_enc_str(value))
      end
    end

# File tk/lib/tkextlib/tcllib/plotchart.rb, line 265
    def plot(series, x, y)
      tk_call_without_enc(@chart, 'plot', _get_eval_enc_str(series), x, y)
      self
    end