lib/dogviz/graphviz_renderer.rb in dogviz-0.0.21 vs lib/dogviz/graphviz_renderer.rb in dogviz-0.0.22

@@ -4,12 +4,18 @@
 module Dogviz
   class GraphvizRenderer
     attr_reader :graph
 
     def initialize(title, hints)
-      @graph = GraphViz.digraph(title)
-      @graph[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
 
@@ -23,10 +29,10 @@
 
     def render_node(parent, id, attributes)
       clean_node_attributes attributes
       default_attributes = {:shape => 'box', :style => ''}
       merged_attributes = default_attributes.merge(attributes)
-      node = parent_node(parent).add_nodes(id, merged_attributes)
+      parent_node(parent).add_nodes(id, merged_attributes)
     end
 
     def render_subgraph(parent, id, attributes)
       if (attributes[:bounded] == true) then
         rendered_id = 'cluster_' + id
\ No newline at end of file