MacRuby/RubyMotion 'Enum' class & sample code

ruby-enum.rb

#!/usr/bin/env macruby

class Enum

  def initialize(value)
    @value = value
  end

  def pointer
    ptr = Pointer.new(type)
    ptr[0] = @value
    ptr
  end

  def size
    size_ptr = Pointer.new('Q')
    align_ptr = Pointer.new('Q')
    NSGetSizeAndAlignment(type, size_ptr, align_ptr)
    size_ptr.value
  end

end

class CTTextAlignment < Enum

  def type
    'C'
  end

end

# sample code to test above classes

framework 'ApplicationServices'

alignment = CTTextAlignment.new(KCTCenterTextAlignment)

setting = CTParagraphStyleSetting.new(KCTParagraphStyleSpecifierAlignment, alignment.size, alignment.pointer)

settingsPtr = Pointer.new(CTParagraphStyleSetting.type)
settingsPtr[0] = setting

paragraphRef = CTParagraphStyleCreate(settingsPtr, 1)

p paragraphRef