Class: AsciiCharts::Cartesian

Inherits:
Chart
  • Object
show all
Defined in:
lib/ascii_charts.rb

Constant Summary

Constants inherited from Chart

AsciiCharts::Chart::DEFAULT_MAX_Y_VALS, AsciiCharts::Chart::DEFAULT_MIN_Y_VALS, AsciiCharts::Chart::STEPS

Instance Attribute Summary

Attributes inherited from Chart

#data, #options

Instance Method Summary collapse

Methods inherited from Chart

#all_ints, #draw, #from_step, #initialize, #max_xval_width, #max_yval, #max_yval_width, #min_yval, #nearest_step, #next_step_down, #next_step_up, #round_value, #rounded_data, #scan_data, #scan_y_range, #step_size, #to_step, #to_string, #y_range

Constructor Details

This class inherits a constructor from AsciiCharts::Chart

Instance Method Details

#lines ⇒ Object 



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# File 'lib/ascii_charts.rb', line 223

def lines
  if self.data.size == 0
    return [[' ', self.options[:title], ' ', '|', '+-', ' ']] 
  end

  lines = [' ']
  
  bar_width = self.max_xval_width + 1

  lines << (' ' * self.max_yval_width) + ' ' + self.rounded_data.map{|pair| pair[0].to_s.center(bar_width)}.join('')

  self.y_range.each_with_index do |current_y, i|
    yval = current_y.to_s
    bar = if 0 == i
            '+'
          else
            '|'
          end
    current_line = [(' ' * (self.max_yval_width - yval.length) ) + "#{current_y}#{bar}"]
    
    self.rounded_data.each do |pair|
      marker = if (0 == i) && options[:hide_zero]
                 '-'
               else
                 '*'
               end
      filler = if 0 == i
                 '-'
               else
                 ' '
               end
      comparison = if self.options[:bar]
                     current_y <= pair[1]
                   else
                     current_y == pair[1]
                   end
      if comparison
        current_line << marker.center(bar_width, filler)
      else
        current_line << filler * bar_width
      end
    end
    lines << current_line.join('')
    current_y = current_y + self.step_size
  end
  lines << ' '
  if self.options[:title]
    lines << self.options[:title].center(lines[1].length)
  end
  lines << ' '
  lines.reverse
end