runHandler: (func, label) ->

    # what if we have this func already? duplicate is safe?

    h = new Handler(func, label)

    @handlerStack[@handlerStack.length - 1].innerHandlers.push(h)

    @_rerunHandler(h, null)

  _rerunHandler: (handler, patch) ->

    handler.patterns = []

    @handlerStack.push(handler)

    try

      handler.func(patch)

    'update(song, rowIndex)'

    'onZoom(zoomInX)'

    ]

  onGraph: ->

    @graph.runHandler(@update.bind(@), "row notes #{@rowIndex}")

  update: (patch) ->

    U = (x) -> @graph.Uri(x)

    notesForThisRow = []

    i = 0

    for n in _.sortBy(@graph.objects(@song, U(':note')))

      if (i % ROW_COUNT) == @rowIndex

      child.dia = @dia

      child.uri = newUri

      child.setAdjuster = @setAdjuster

      child.song = @song # could change, but all the notes will be rebuilt

      child.zoomInX = @zoomInX # missing binding; see onZoom

      return child      

  onZoom: ->

    for e in @children

      e.zoomInX = @zoomInX

      @graph.applyAndSendPatch(patch)

  addHandler: ->

    @graph.runHandler(@update.bind(@))

  update: ->

    U = (x) -> @graph.Uri(x)

    @effect = @graph.uriValue(@uri, U(':effectClass'))

    @effectLabel = @effect.replace(/.*\//, '')

    @noteLabel = @uri.replace(/.*\//, '')

    @existingColorScaleSetting = null

        @colorScaleFromGraph = value

        @colorScale = value

        @existingColorScaleSetting = setting

    if @existingColorScaleSetting == null

      @colorScaleFromGraph = '#ffffff'

      @colorScale = '#ffffff'

  onDel: ->

    patch = {delQuads: [{subject: @song, predicate: @graph.Uri(':note'), object: @uri, graph: @song}], addQuads: []}

    @graph.applyAndSendPatch(patch)