def draw(svg, bounds, options={})
if options[:calculate_markers] && (options[:point_markers].nil? || options[:point_markers].empty?)
markers = (options[:markers] || self.markers) || 5
options[:point_markers] = []
each_marker(markers, options[:min_key], options[:max_key], bounds[:width], options, :key_formatter) do |label, x|
options[:point_markers] << [x, label]
end
end
unless options[:point_markers].nil?
dx = bounds[:width].to_f / (options[:max_key] - options[:min_key] + 1)
(0...options[:point_markers].size).map do |idx|
x_coord = dx * (options[:point_markers][idx].first - options[:min_key]) + dx/2
if options[:point_markers_ticks]
svg.line(:x1 => x_coord, :y1 => 0, :x2 => x_coord, :y2 => -3, :style => "stroke:#{(options[:theme].marker || 'white').to_s}; stroke-width:1")
end
svg.text(options[:point_markers][idx].last,
:x => 0,
:y => 0,
'font-size' => options[:theme].marker_font_size || relative(90),
'font-family' => options[:theme].font_family,
:transform => "translate(#{x_coord},#{bounds[:height]}) rotate(#{options[:point_markers_rotation] || 0})",
:fill => (options[:theme].marker || 'white').to_s,
'text-anchor' => 'middle') unless options[:point_markers][idx].nil?
end
end
end