Method: GChart::Axis#validate!

Defined in:
lib/gchart/axis.rb

#validate! ⇒ Object

Ensures that all combinations of attributes which have been set will work with each other. Raises ArgumentError otherwise.



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# File 'lib/gchart/axis.rb', line 78

def validate!
  if labels.size > 0 and label_positions.size > 0 and labels.size != label_positions.size
    raise ArgumentError.new(
      "Both labels and label_positions have been specified, but their " +
      "respective counts do not match (labels.size = '#{labels.size}' " +
      "and label_positions.size = '#{label_positions.size}')"
    )
  end

  unless label_positions.all? { |pos| pos.is_a?(Numeric) }
    raise ArgumentError.new(
      "The label_positions attribute requires numeric values for each position specified"
    )
  end

  if range
    unless range.is_a?(Range)
      raise ArgumentError.new("The range attribute has been specified with a non-Range class")
    end

    unless range.first.is_a?(Numeric)
      raise ArgumentError.new("The range attribute has been specified with non-numeric range values")
    end
  end

  if font_size and not text_color
    raise ArgumentError.new("To specify a font_size, a text_color must also be specified")
  end

  if text_alignment and not (text_color and font_size)
    raise ArgumentError.new(
      "To specify a text_alignment, both text_color and font_size must also be specified"
    )
  end

  if text_color and not GChart.valid_color?(text_color)
    raise ArgumentError.new("The text_color attribute has been specified with an invalid color")
  end

  if font_size and not font_size.is_a?(Numeric)
    raise ArgumentError.new("The font_size must have a numeric value")
  end

  if text_alignment and not TEXT_ALIGNMENT[text_alignment]
    raise ArgumentError.new(
      "The text_alignment attribute has been specified with a non-TEXT_ALIGNMENT"
    )
  end

  if not range_markers.all? { |array| array.is_a?(Array) and array.size == 2 and
                                      array[0].is_a?(Range) and array[0].first.is_a?(Numeric) and
                                      GChart.valid_color?(array[1]) }
    raise ArgumentError.new(
      "The range_markers attribute must be an array of 2-element sub-arrays such that " +
      "the first element in each sub-array is a Range of numeric values and the second " +
      "element in each sub-array is a valid color"
    )
  end
end