if note in selection.selected()

      selection.selected(_.without(selection.selected(), note))

coffeeElementSetup(class TimelineEditor extends Polymer.mixinBehaviors([Polymer.IronResizableBehavior], Polymer.Element)

  @is: 'light9-timeline-editor'

  @getter_properties:

    viewState: { type: Object }

    debug: {type: String}

    graph: {type: Object, notify: true}

    project: {type: Object}

    setAdjuster: {type: Function, notify: true}

    playerSong: {type: String, notify: true}

    followPlayerSong: {type: Boolean, notify: true, value: true}

    song: {type: String, notify: true}

    show: {type: String, notify: true}

    songTime: {type: Number, notify: true}

    songDuration: {type: Number, notify: true}

    songPlaying: {type: Boolean, notify: true}

    selection: {type: Object, notify: true}

  @getter_observers: [

    '_onSong(playerSong, followPlayerSong)',

    '_onGraph(graph)',

    '_onSongDuration(songDuration, viewState)',

    '_onSetAdjuster(setAdjuster)',

  ]

  constructor: ->

    super()

    @viewState = new ViewState()

    window.viewState = @viewState

  ready: ->

    super.ready()

    @addEventListener 'mousedown', (ev) => @$.adjustersCanvas.onDown(ev)

    @addEventListener 'mousemove', (ev) => @$.adjustersCanvas.onMove(ev)

    @addEventListener 'mouseup', (ev) => @$.adjustersCanvas.onUp(ev)

    ko.options.deferUpdates = true

    @selection = {hover: ko.observable(null), selected: ko.observable([])}

    window.debug_zoomOrLayoutChangedCount = 0

    window.debug_adjUpdateDisplay = 0

    ko.computed(@zoomOrLayoutChanged.bind(@))

    @trackMouse()

    @bindKeys()

    @bindWheelZoom(@)

    setInterval(@updateDebugSummary.bind(@), 100)

    @addEventListener('iron-resize', @_onIronResize.bind(@))

    Polymer.RenderStatus.afterNextRender(this, @_onIronResize.bind(@))

    Polymer.RenderStatus.afterNextRender this, =>

      setupDrop(@$.zoomed.$.rows, @$.zoomed.$.rows, @, @$.zoomed.onDrop.bind(@$.zoomed))

  _onIronResize: ->

    @viewState.setWidth(@offsetWidth)

    @viewState.coveredByDiagramTop(@$.coveredByDiagram.offsetTop)

    @viewState.rowsY(@$.zoomed.$.rows.offsetTop) if @$.zoomed?.$?.rows?

    @viewState.audioY(@$.audio.offsetTop)

    @viewState.audioH(@$.audio.offsetHeight)

    if @$.zoomed?.$?.time?

      @viewState.zoomedTimeY(@$.zoomed.$.time.offsetTop)

      @viewState.zoomedTimeH(@$.zoomed.$.time.offsetHeight)

    @viewState.cursor.t(t)

  _onSongDuration: (d) ->

    d = 700 if d < 1 # bug is that asco isn't giving duration, but 0 makes the scale corrupt

    @viewState.zoomSpec.duration(d)

  _onSong: (s) ->

    @song = @playerSong if @followPlayerSong

  _onGraph: (graph) ->

    @project = new Project(graph)

    @show = 'http://light9.bigasterisk.com/show/dance2019'

  _onSetAdjuster: () ->

    @makeZoomAdjs()

  updateDebugSummary: ->

    elemCount = (tag) -> document.getElementsByTagName(tag).length

    @debug = "#{window.debug_zoomOrLayoutChangedCount} layout change,

     #{elemCount('light9-timeline-note')} notes,

     #{@selection.selected().length} selected

     #{elemCount('light9-timeline-graph-row')} rows,

     #{window.debug_adjsCount} adjuster items registered,

     #{window.debug_adjUpdateDisplay} adjuster updateDisplay calls,