class RGL::DOT::Edge
This is an undirected edge representation.
Attributes
from[RW]
A node or subgraph reference or instance to be used as the starting point for an edge.
to[RW]
A node or subgraph reference or instance to be used as the ending point for an edge.
Public Class Methods
new(params = {}, option_list = EDGE_OPTS)
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Creates a new Edge with the params Hash providing settings for all edge options. The option_list parameter restricts those options to the list of valid names it contains.
Calls superclass method
# File lib/rgl/rdot.rb, line 430 def initialize(params = {}, option_list = EDGE_OPTS) super(params, option_list) @from = params['from'] ? params['from'] : nil @to = params['to'] ? params['to'] : nil end
Public Instance Methods
to_s(leader = '', indent = ' ')
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Returns a string representation of this edge which is consumable by the
graphviz tools dot
and neato
. The leader
parameter is used to indent every line of the returned string, and the
indent parameter is used to additionally indent nested items.
# File lib/rgl/rdot.rb, line 441 def to_s(leader = '', indent = ' ') stringified_options = @options.collect do |name, val| unless val.nil? leader + indent + "#{quote_ID(name)} = #{quote_ID(val)}" end end.compact.join(",\n") f_s = @from || '' t_s = @to || '' if stringified_options.empty? leader + quote_ID(f_s) + ' ' + edge_link + ' ' + quote_ID(t_s) else leader + quote_ID(f_s) + ' ' + edge_link + ' ' + quote_ID(t_s) + " [\n" + stringified_options + "\n" + leader + "]" end end
Private Instance Methods
edge_link()
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# File lib/rgl/rdot.rb, line 462 def edge_link '--' end