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Contents
module Prawn
module Graph
module Charts
class Base
VALID_OPTIONS = [:at, :width, :height]
attr_reader :series, :prawn, :options, :lowest_value, :highest_value
def initialize(data, prawn, options = {}, &block)
Prawn.verify_options VALID_OPTIONS, options
if data.is_a?(Array) || (!data.is_a?(Array) && data.is_a?(Prawn::Graph::Series))
data = [ data ] unless data.is_a?(Array)
else
raise ArgumentError.new("data must be a multidimensional Array, array of Prawn::Graph::Series or a single Prawn::Graph::Series")
end
@series = []
data.each do |s|
if s.is_a?(Prawn::Graph::Series)
@series << s
else
title = s.shift
@series << Prawn::Graph::Series.new(s, title: title, type: series_type)
end
end
@prawn = prawn
@options = options
calculate_extreme_values!
end
def titles
@series.collect(&:title)
end
def position
end
def draw
chart_object.draw
end
private
def chart_object
raise RuntimeError.new("I need to be subclassed.")
end
def series_type
:bar
end
def calculate_extreme_values!
@lowest_value = @series.collect(&:min).min
@highest_value = @series.collect(&:max).max
end
def process_the(data_array)
col = []
val = []
data_array.each { |i| val << i[1]; col << i[0] }
[ col, val, val.min, val.max ]
end
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems