if @settings.has(key)

      return @settings.get(key).setting

    return null

  deleteSetting: (setting) ->

    key = @keyForSetting.get(setting.value)

    row = @settings.get(key)

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

    @settings.delete(key)

    @keyForSetting.delete(setting)

  clear: ->

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

    for settingStr in Array.from(toClear)

      @activeSettings.deleteSetting(U(settingStr))

  clearSettings: ->

    @activeSettings.clear()

  register: (device, deviceAttr, graphValueChanged) ->

    @activeSettings.registerWidget(device, deviceAttr, graphValueChanged)

  shouldBeStored: (deviceAttr, value) ->

    # this is a bug for zoom=0, since collector will default it to

    # stick at the last setting if we don't explicitly send the

    @activeSettings.forAll(@_removeEffectSetting.bind(@))

  controlChanged: (device, deviceAttr, value) ->

    # value is float or #color or (Uri or null)

    if (value == undefined or (typeof value == "number" and isNaN(value)) or (typeof value == "object" and value != null and not value.id))

      throw new Error("controlChanged sent bad value " + value)

    if @shouldBeStored(deviceAttr, value)

      if not effectSetting?

        @_addEffectSetting(device, deviceAttr, value)

      else

        @_patchExistingEffectSetting(effectSetting, deviceAttr, value)

    else

    @currentSettings = {}

  onGraph: ->

    @graphToControls = new GraphToControls(@graph)

    @graph.runHandler(@update.bind(@), 'Light9LiveControls update')

    effect = new URL(window.location.href).searchParams.get('effect')

    if effect?

      @effectChoice = effect

  newEffect: ->

    @effectChoice = @graphToControls.newEffect().value

  onEffectChoice: ->

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

    if not @effectChoice?