Sha256: 28c391a296a050d1c84c49702a7b743845a505e61185784cf406a27344a95b37
Contents?: true
Size: 1.75 KB
Versions: 28
Compression:
Stored size: 1.75 KB
Contents
require File.dirname(__FILE__) + '/base'
require File.dirname(__FILE__) + '/stacked_mixin'
class Gruff::StackedArea < Gruff::Base
include StackedMixin
attr_accessor :last_series_goes_on_bottom
def draw
get_maximum_by_stack
super
return unless @has_data
@x_increment = @graph_width / (@column_count - 1).to_f
@d = @d.stroke 'transparent'
height = Array.new(@column_count, 0)
data_points = nil
iterator = last_series_goes_on_bottom ? :reverse_each : :each
@norm_data.send(iterator) do |data_row|
prev_data_points = data_points
data_points = Array.new
@d = @d.fill data_row[DATA_COLOR_INDEX]
data_row[DATA_VALUES_INDEX].each_with_index do |data_point, index|
# Use incremented x and scaled y
new_x = @graph_left + (@x_increment * index)
new_y = @graph_top + (@graph_height - data_point * @graph_height - height[index])
height[index] += (data_point * @graph_height)
data_points << new_x
data_points << new_y
draw_label(new_x, index)
end
if prev_data_points
poly_points = data_points.dup
(prev_data_points.length/2 - 1).downto(0) do |i|
poly_points << prev_data_points[2*i]
poly_points << prev_data_points[2*i+1]
end
poly_points << data_points[0]
poly_points << data_points[1]
else
poly_points = data_points.dup
poly_points << @graph_right
poly_points << @graph_bottom - 1
poly_points << @graph_left
poly_points << @graph_bottom - 1
poly_points << data_points[0]
poly_points << data_points[1]
end
@d = @d.polyline(*poly_points)
end
@d.draw(@base_image)
end
end
Version data entries
28 entries across 28 versions & 11 rubygems