Class: PRRD::Graph::Line

Inherits:
Entity
  • Object
show all
Defined in:
lib/prrd/graph/line.rb

Overview

PRRD Graph Line class

Instance Attribute Summary

Attributes inherited from Entity

#data, #keys

Instance Method Summary collapse

Methods inherited from Entity

#method_missing, #validate_presence

Constructor Details

#initialize(values = nil) ⇒ Line

Constructor



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# File 'lib/prrd/graph/line.rb', line 11

def initialize(values = nil)
  @keys = [
    :value,
    :width,
    :color,
    :legend,
    :stack
  ]

  super values
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class PRRD::Entity

Instance Method Details

#to_s ⇒ Object

Transform to a LINE formatted string



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# File 'lib/prrd/graph/line.rb', line 24

def to_s
  fail 'Empty line object' if @data.empty?

  @data[:width] ||= 1

  validate_presence :value

  chunks = []

  @keys.each do |k|
    next unless @data.key?(k)
    case k
    when :value
      chunks << "LINE%s:%s%s" % [@data[:width], @data[k], @data[:color]]
    when :width, :color
      # nope
    when :legend
      chunks << "\"%s\"" % @data[k]
    when :stack
      chunks << "STACK"
    else
      chunks << @data[k]
    end
  end

  chunks.join ':'
end