TreeDecorator

TreeDecorator has been designed to make it easier to decorate trees or nested sets of data. The tools provided, walk through a hash or nested object and apply code to containers and elements based on user defined rules.

For an example of how TreeDecorator can be used in Rails:

class Thing < ActiveRecord::Base
  acts_as_nested_set

  def name
    @name
  end
end

hanger = TreeDecorator::ObjectHanger.new(Thing.roots)

hanger.outer   {|content| content_tag('ul', content.html_safe)}
hanger.inner   {|content| content_tag('li', content.html_safe)}
hanger.element {|thing| link_to(thing.name, thing_path(thing))}

hanger.tree  #----> outputs a nested HTML unordered list with each thing's name 
             #      linking to it's default path.

See lib/example and tests for examples of usage

tree_decorator

TreeDecorator