         return this
 
     if @selected?
-      if t - @selected.t < 200
+      if t - @selected.t < .2
         mdx = pos.x - @selected.mx
         mdy = pos.y - @selected.my
         if mdx*mdx+mdy*mdy < 10*10

    for n in @contains
      n.forAll(fn)
    fn(this)

  tryAll: (fn) ->
    for n in @contains


shannon_fano_dropdown_menu = [
  {
    name: 'automatic Shannon-Fano step',
    action: (c, t) ->
      console.log('automatic Shannon-Fano step')
