def _initialize
    filename   = @filename
    filehandle = File.open(filename, 'rb')

    @filehandle    = filehandle
    @datasize      = FileTest.size(filename)
    @using_tmpfile = false

    # Read the entire external chart binary into the the data buffer.
    # This will be retrieved by _get_data() when the chart is closed().
    @data = @filehandle.read(@datasize)
  end
def _initialize
    filename   = @filename
    filehandle = File.open(filename, 'rb')

    @filehandle    = filehandle
    @datasize      = FileTest.size(filename)
    @using_tmpfile = false

    # Read the entire external chart binary into the the data buffer.
    # This will be retrieved by _get_data() when the chart is closed().
    @data = @filehandle.read(@datasize)
  end
:nodoc:


 new()



 _initialize()

 Read all the data into memory for the external binary style chart.