Class: Kovid::AsciiCharts::Cartesian

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

Constant Summary

Constants inherited from Chart

Kovid::AsciiCharts::Chart::DEFAULT_MAX_Y_VALS, Kovid::AsciiCharts::Chart::DEFAULT_MIN_Y_VALS, Kovid::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 Kovid::AsciiCharts::Chart

Instance Method Details

#lines ⇒ Object 



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# File 'lib/kovid/ascii_charts.rb', line 226

def lines
  return [[' ', options[:title], ' ', '|', '+-', ' ']] if data.empty?

  lines = [' ']

  bar_width = max_xval_width + 1

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

  y_range.each_with_index do |current_y, i|
    yval = current_y.to_s
    bar = if i == 0
            '+'
          else
            '|'
          end
    current_line = [(' ' * (max_yval_width - yval.length)) + "#{current_y}#{bar}"]

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