Class: GraphvizR::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/graphviz_r.rb

Overview

This represents graphviz node.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, args, parent) ⇒ Node

Returns a new instance of Node.



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# File 'lib/graphviz_r.rb', line 241

def initialize(name, args, parent)
  @parent = parent
  @name = name
  @edge = nil
  @port = nil
  @attributes = {}
  unless args.empty?
    arg = args[0]
    if arg.is_a? Symbol
      @port = arg
      @attributes = {}
    elsif arg.is_a? Array
      @port = nil
      @attributes = arg[0]
    end
  end
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/graphviz_r.rb', line 239

def name
  @name
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/graphviz_r.rb', line 239

def parent
  @parent
end

Instance Method Details

#-(node) ⇒ Object

generate an edge from self to given node. this generates a undirected edge.



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# File 'lib/graphviz_r.rb', line 275

def -(node)
  @parent.to_graph
  @edge = Edge.new self, node, @parent, '--'
end

#>>(node) ⇒ Object

generate an edge from self to given node. this generates a directed edge.



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# File 'lib/graphviz_r.rb', line 268

def >>(node)
  @parent.to_digraph
  @edge = Edge.new self, node, @parent
end

#[](attributes) ⇒ Object

if blank between node and attributes does not exist, this method is used. otherwise GraphvizR#[] is used. ex) gvr.graph[:label => ‘example’, :size => ‘1.5, 2.5’]



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# File 'lib/graphviz_r.rb', line 262

def [](attributes)
  @attributes = attributes
end

#to_dot(indent = 0) ⇒ Object

to dot format



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# File 'lib/graphviz_r.rb', line 290

def to_dot(indent=0)
  attributes = @attributes.empty? ? '' : ' ' + @attributes.to_dot
  "#{INDENT_UNIT * indent}#{@name}#{attributes};\n"
end

#to_s ⇒ Object

to string



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# File 'lib/graphviz_r.rb', line 281

def to_s
  if @port
    "#{@name}:#{@port}"
  else
    @name
  end
end