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Contents
class Hirb::Helpers::ParentChildTree < Hirb::Helpers::Tree
class <<self
# Starting with the given node, this builds a tree by recursively calling a children method.
# Takes same options as Hirb::Helper::Table.render with some additional ones below.
# ==== Options:
# [:value_method] Method or proc to call to display as a node's value. If not given, uses :name if node
# responds to :name or defaults to :object_id.
# [:children_method] Method or proc to call to obtain a node's children. Default is :children.
def render(root_node, options={})
value_method = options[:value_method] || (root_node.respond_to?(:name) ? :name : :object_id)
@value_method = value_method.is_a?(Proc) ? value_method : lambda {|n| n.send(value_method) }
children_method = options[:children_method] || :children
@children_method = children_method.is_a?(Proc) ? children_method : lambda {|n| n.send(children_method)}
@nodes = []
build_node(root_node, 0)
super(@nodes, options)
end
def build_node(node, level) #:nodoc:
@nodes << {:value=>@value_method.call(node), :level=>level}
@children_method.call(node).each {|e| build_node(e, level + 1)}
end
end
end
Version data entries
45 entries across 44 versions & 5 rubygems