Class: Gruff::AccumulatorBar

Inherits:
StackedBar show all
Defined in:
lib/gruff/accumulator_bar.rb

Overview

A special bar graph that shows a single dataset as a set of stacked bars. The bottom bar shows the running total and the top bar shows the new value being added to the array.

Constant Summary

Constants inherited from Base

Base::DEFAULT_MARGIN, Base::DEFAULT_TARGET_WIDTH, Base::LABEL_MARGIN, Base::LEGEND_MARGIN, Base::THOUSAND_SEPARATOR

Instance Attribute Summary

Attributes inherited from StackedBar

#bar_spacing, #label_formatting, #segment_spacing, #show_labels_for_bar_values

Attributes inherited from Base

#additional_line_values, #bold_title, #bottom_margin, #center_labels_over_point, #colors, #font, #font_color, #has_left_labels, #hide_legend, #hide_line_markers, #hide_line_numbers, #hide_title, #label_max_size, #label_stagger_height, #label_truncation_style, #labels, #left_margin, #legend_at_bottom, #legend_box_size, #legend_font_size, #legend_margin, #marker_color, #marker_count, #marker_font_size, #marker_shadow_color, #maximum_value, #minimum_value, #no_data_message, #right_margin, #sort, #sorted_drawing, #title, #title_font, #title_font_size, #title_margin, #top_margin, #use_data_label, #x_axis_increment, #x_axis_label, #y_axis_increment, #y_axis_label

Instance Method Summary collapse

Methods inherited from Base

#add_color, #data, #initialize, #margins=, #replace_colors, #theme=, #theme_37signals, #theme_greyscale, #theme_keynote, #theme_odeo, #theme_pastel, #theme_rails_keynote, #to_blob, #write

Constructor Details

This class inherits a constructor from Gruff::Base

Instance Method Details

#draw ⇒ Object

Raises:



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# File 'lib/gruff/accumulator_bar.rb', line 9

def draw
  raise(Gruff::IncorrectNumberOfDatasetsException) unless store.length == 1

  accum_array = store.data.first.points[0..-2].reduce([0]) { |a, v| a << a.last + v }
  data 'Accumulator', accum_array
  set_colors
  store.reverse!
  super
end