Experimental, do not use.
# File lib/scruffy/layers/sparkline_bar.rb, line 6 def draw(svg, coords, options = {}) zero_point = @height / 2.0 coords.each do |coord| x, y, bar_height = (coord.first-(@bar_width * 0.5)), coord.last, (height - coord.last) bar_color = (y > zero_point) ? 'black' : 'red' bar_height = (bar_height - zero_point) #y = (bar_height < 0) ? # svg.rect( :x => x, :y => zero_point, :width => @bar_width, :height => , # :fill => bar_color, :stroke => 'none', 'style' => "opacity: #{opacity}" ) end end
# File lib/scruffy/layers/sparkline_bar.rb, line 23 def generate_coordinates(options = {}) @bar_width = (width / points.size) * 0.9 options[:point_distance] = (width - (width / points.size)) / (points.size - 1).to_f #TODO iteration by index on points. Needs to change coords = (0...points.size).map do |idx| x_coord = (options[:point_distance] * idx) + (width / points.size * 0.5) relative_percent = ((points[idx] == min_value) ? 0 : ((points[idx] - min_value) / (max_value - min_value).to_f)) y_coord = (height - (height * relative_percent)) [x_coord, y_coord] end coords end