# File lib/graphviz.rb, line 528
528:   def self.default( hOpts )
529:     hOpts.each do |k, v|
530:       case k.to_s
531:         when "use"
532:           @@prog = v
533:         when "path"
534:           @@path = v.split( "," ).map{ |x| x.strip }
535:         when "errors"
536:           @@errors = v
537:         when "extlibs"
538:           @@extlibs = v.split( "," ).map{ |x| x.strip }
539:         when "output"
540:           warn ":output option is deprecated!"
541:           @@format = v
542:         else
543:           warn "Invalide option #{k}!"
544:       end
545:     end
546:   end