sketchup-plugin-helper.rb

require 'sketchup'

module MyPlugin
  class Helper
    class << self
      LENGTH_TEXT_SYMBOL_DICT = {
        :inches       => '"',
        :feet         => "'",
        :millimeters  => "mm",
        :centimeters  => "cm",
        :meters       => "m"
      }

      LENGTH_NAME_DICT = {
        :inches       => "Inches",
        :feet         => "Feet",
        :millimeters  => "Millimeters",
        :centimeters  => "Centimeters",
        :meters       => "Meters"
      }

      def length_type(arg = 'nameString')
        unitopts = Sketchup.active_model.options['UnitsOptions']

        # allow the ordinal in the set to be returned if arg
        # is any class other than String (or a String subclass.)
        return unitopts['LengthUnit'] unless arg.kind_of?(String)

        if unitopts['LengthFormat'] == 0 # decimal
          unitSet = [:inches, :feet, :millimeters, :centimeters, :meters]
          unitSet[unitopts['LengthUnit']]
        elsif unitopts['LengthFormat'] == 2 # engineering
          :feet
        else # 1 == Architectural, 3 == Fractional
          :inches
        end
      end

      def length_text_symbol(arg = 'nameString')
        LENGTH_TEXT_SYMBOL_DICT[length_type(arg)]
      end

      def length_name(arg = 'nameString')
        LENGTH_NAME_DICT[length_type(arg)]
      end
    end
  end
end