gistfile1.rb

class Folder
  include ClosedFolder, OpenFolder
  
  def initialize(name)
    @name = name
    @folder_state = ClosedFolder.new
  end
  
  def pretty_name
    @folder_state.pretty_name
  end
  
  def left_click
    @folder_state = @folder_state.left_click
  end
end

module ClosedFolder
  def pretty_name
    
  end
  
  def left_click
    # do work
    OpenFolder.new #damn it we can't access this can we? Or does it work because it's included in the class?
  end
end

module OpenFolder
  def pretty_name
  end
  
  def left_click
    # do work
    ClosedFolder.new
  end
end