     container.setX pos.x  if pos.x?
     container.setY pos.y  if pos.y?
 
-    @createCanvas()
+    @createCanvas()  unless @prependCanvas
 
     return container
 

    activeDia = if source.dia in @activeDias then source \
                else if target.dia in @activeDias then target

    if activeDia
      lineColor  = options.lineColor  ? \
                   (activeDia.dia.getOption 'colorTag') ? lineColorActive



  addContainer: (container, pos = {}) ->

    @createCanvas()  if @prependCanvas

    @addSubView container

