Jeremy Green
July 29th, 2009
Brasten Sager
August 6th, 2006
Standard multi_bar graph.
Due to the size of the bar graph, X-axis coords must be squeezed so that the bars do not hang off the ends of the graph.
Unfortunately this just mean that bar-graphs and most other graphs end up on different points. Maybe adding a padding to the coordinates should be a graph-wide thing?
Update : x-axis coords for lines and area charts should now line up with the center of bar charts.
# File lib/scruffy/layers/multi_bar.rb, line 29 def generate_coordinates(options = {}) @point_width = (width / points.size) @point_space = @point_width * 0.1 @point_width = @point_width - @point_space @bar_width = @point_width/options[:num_bars] @bar_space = @bar_width * 0.1 @bar_width = @bar_width * 0.9 #options[:point_distance] = (width - (width / points.size)) / (points.size - 1).to_f #TODO more array work with index, try to rework to be accepting of hashes coords = (0...points.size).map do |idx| x_coord = (@point_width * idx) + @point_space/2 + @point_space*idx + @bar_width * options[:position] + @bar_space*(options[:position].to_f - 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