def directory_key_map
      @key_map["<"] = Action.new("Goto Parent Dir") { |obj|
        # go to parent dir
        $log.debug "KKK:  called proc for <"
        Dir.chdir("..")
        obj.buffer_changed
      }
      @key_map[">"] = Action.new("Change Dir"){ |obj|
        $log.debug "KKK:  called proc for > : #{obj.current_value} "
        # step into directory

        dir = obj.current_value
        if File.directory? dir
          Dir.chdir dir
          obj.buffer_changed
        end
      }
    end
def directory_key_map
      @key_map["<"] = Action.new("Goto Parent Dir") { |obj|
        # go to parent dir
        $log.debug "KKK:  called proc for <"
        Dir.chdir("..")
        obj.buffer_changed
      }
      @key_map[">"] = Action.new("Change Dir"){ |obj|
        $log.debug "KKK:  called proc for > : #{obj.current_value} "
        # step into directory

        dir = obj.current_value
        if File.directory? dir
          Dir.chdir dir
          obj.buffer_changed
        end
      }
    end
specific actions for directory listers
 currently for stepping into directory under cursor
 and going to parent dir.