     circles = @get_marks()
     data = @model.get_ref('data_source').get('data')
     @calc_buffer(data)
+    @plot_view.ctx.fillStyle = 'blue'
+    @plot_view.ctx.strokeStyle = 'blue'
 
     
     _.each(@screenx, (val, i) =>

      @plotview.renderers[renderer.id].fill_marks(marks)
    return null


window.overlay_render = 0
class ZoomToolView extends PlotWidget

    @plot_id = options.plot_id
    @plot_model = options.plot_model
    @plot_view = options.plot_view
  addPolygon: (x,y) ->
    @plot_view.ctx.fillRect(x,y,5,5)

tojq = (d3selection) ->
  return $(d3selection[0][0])
