# File tk/lib/tkextlib/tcllib/plotchart.rb, line 599
    def initialize(*args) 
      # args := ([parent,] xlabels, ylabels [, series] [, keys])
      # xlabels, ylabels := labels | axis ( depend on normal or horizontal )
      # labels := Array of [label, label, ...]
      #   (It determines the number of bars that will be plotted per series.)
      # axis := Array of [minimum, maximum, stepsize]
      # series := Integer number of data series | 'stacked' | :stacked
      if args[0].kind_of?(Array)
        @xlabels = args.shift
        @ylabels  = args.shift

        if args[0].kind_of?(Hash)
          @series_size = :stacked
        else
          @series_size  = args.shift
        end

        super(*args) # create canvas widget
      else
        parent = args.shift

        @xlabels = args.shift
        @ylabels = args.shift

        if args[0].kind_of?(Hash)
          @series_size = :stacked
        else
          @series_size  = args.shift
        end

        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 647
    def __destroy_hook__
      Tk::Tcllib::Plotchart::PlotSeries::SeriesID_TBL.delete(@path)
    end

# File tk/lib/tkextlib/tcllib/plotchart.rb, line 656
    def colours(*cols)
      # set the colours to be used
      tk_call_without_enc(@chart, 'colours', *cols)
      self
    end

# File tk/lib/tkextlib/tcllib/plotchart.rb, line 651
    def plot(series, dat, col=None)
      tk_call_without_enc(@chart, 'plot', series, dat, col)
      self
    end