Class: Squid::Axis

Inherits:
Object
  • Object
show all
Includes:
Format
Defined in:
lib/squid/axis.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Format

#format_for, #number_to_float, #number_to_minutes_and_seconds

Constructor Details

#initialize(data, steps:, stack:, format:, &block) ⇒ Axis

Returns a new instance of Axis.



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# File 'lib/squid/axis.rb', line 10

def initialize(data, steps:, stack:, format:, &block)
  @data, @steps, @stack, @format = data, steps, stack, format
  @width_proc = block if block_given?
end

Instance Attribute Details

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/squid/axis.rb', line 8

def data
  @data
end

Instance Method Details

#labels ⇒ Object 



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# File 'lib/squid/axis.rb', line 21

def labels
  min, max = minmax
  values = if min.nil? || max.nil? || @steps.zero?
    []
  else
    max.step(by: (min - max)/@steps.to_f, to: min)
  end
  @labels ||= values.map{|value| format_for value, @format}
end

#minmax ⇒ Object 



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# File 'lib/squid/axis.rb', line 15

def minmax
  @minmax ||= [min, max].compact.map do |number|
    approximate number
  end
end

#width ⇒ Object 



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# File 'lib/squid/axis.rb', line 31

def width
  @width ||= labels.map{|label| label_width label}.max || 0
end