Class: Dogviz::GraphvizRenderer

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(title, hints) ⇒ GraphvizRenderer

Returns a new instance of GraphvizRenderer.



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# File 'lib/dogviz/graphviz_renderer.rb', line 8

def initialize(title, hints)
  construction_hints = {}
  after_hints = hints.clone
  if hints.has_key?(:use)
    construction_hints[:use] = hints[:use]
    after_hints.delete :use
  end
  @graph = GraphViz.digraph(title, construction_hints)
  @graph[after_hints]
  @subgraphs = {}
  @nodes = {}
  @rendered_subgraph_ids = {}
end

Instance Attribute Details

#graph ⇒ Object (readonly)

Returns the value of attribute graph.



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# File 'lib/dogviz/graphviz_renderer.rb', line 6

def graph
  @graph
end

Instance Method Details

#render_edge(from, other, options) ⇒ Object 



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# File 'lib/dogviz/graphviz_renderer.rb', line 22

def render_edge(from, other, options)
  edge = graph.add_edges from.id, other.id
  options.each { |key, value|
    edge[key] = value unless value.nil?
  }
  edge
end

#render_node(parent, id, attributes) ⇒ Object 



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# File 'lib/dogviz/graphviz_renderer.rb', line 30

def render_node(parent, id, attributes)
  clean_node_attributes attributes
  default_attributes = {:shape => 'box', :style => ''}
  merged_attributes = default_attributes.merge(attributes)
  parent_node(parent).add_nodes(id, merged_attributes)
end

#render_subgraph(parent, id, attributes) ⇒ Object 



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# File 'lib/dogviz/graphviz_renderer.rb', line 37

def render_subgraph(parent, id, attributes)
  if (attributes[:bounded] == true) then
    rendered_id = 'cluster_' + id
  else
    rendered_id = id
  end
  @rendered_subgraph_ids[id] = rendered_id

  subgraph = parent_node(parent).add_graph(rendered_id, clean_subgraph_attributes(attributes.clone))
  @subgraphs[id] = subgraph
  subgraph
end