 
   _trigger_event: (event_type, active, e)->
     if active?
+      if event_type == 'scroll'
+        e.preventDefault()
+        e.stopPropagation()
       @trigger("#{event_type}:#{active.id}", e)
 
   _bokify_hammer: (e) ->

    @_bokify_jq(e)
    e.bokeh.delta = delta
    @_trigger('scroll', e)
    e.preventDefault()
    e.stopPropagation()

  _key_down: (e) ->
    # NOTE: keydown event triggered unconditionally


  initialize: (attrs, options) ->
    super(attrs, options)
    hit_area = @get('hit_area')
    @_hammer_element hit_area[0]


  _hammer_element: (el)->
    @hammer = new Hammer(el)
