# File rbSnack/tkSnackUtil.rb, line 154
    def initialize( *args ,  &op_block)
      super(*args, &op_block)
      w = self.width
      h = self.height
      @viewPort=[50,30,w-20,h-30]
      @worldFrame=[0,800,30,2400]
      @labelSteps =[10,200]
      @borderColor, @graphColor = "#daa", '#f8f8ff'
      @nextColour =0
      @fileName=nil
    end