if @settings.has(key)

      row = @settings.get(key)

      row.onChangeFunc = graphValueChanged

      row.onChangeFunc(row.jsValue)

  effectSettingLookup: (device, attr) ->

    key = device.value + " " + attr.value

    if @settings.has(key)

      return @settings.get(key).setting

    return null

  deleteSetting: (setting) ->

    log('deleteSetting ' + setting.value)

    key = @keyForSetting.get(setting.value)

    row = @settings.get(key)

    if row? and not row.setting.equals(setting)

      throw new Error('corrupt row for ' + setting.value)

    row.onChangeFunc(null) if row?.onChangeFunc?

    @settings.delete(key)

    @keyForSetting.delete(setting)

  clear: ->

    new Map(@settings).forEach (row, key) ->

    @settings.clear()

    @keyForSetting.clear()

  forAll: (cb) ->

    all = Array.from(@keyForSetting.keys())

    for s in all

      cb(@graph.Uri(s))

  allSettingsStr: ->

    @keyForSetting.keys()

class GraphToControls

  # More efficient bridge between liveControl widgets and graph edits,

  # as opposed to letting each widget scan the graph and push lots of

  # tiny patches to it.

  constructor: (@graph) ->

    @activeSettings = new ActiveSettings(@graph)

    @effect = null

  ctxForEffect: (effect) ->

    @graph.Uri(effect.value.replace(

      "light9.bigasterisk.com/effect",

      "light9.bigasterisk.com/show/dance2018/effect"))