     @ctx.lineTo(x2, y2)
     @ctx.stroke()
 
-  drawChainIndicator : (x, top, bottom) ->
+  drawChainIndicator : (x, top, bottom, emphasize = false) ->
     # Draw a dashed line
     dashLength = (bottom - top) / 7
+    if emphasize
+      @ctx.lineWidth = 4
     @ctx.beginPath()
     @ctx.strokeStyle = @vgColor
     for i in [0, 1, 2]
       @ctx.moveTo(x, top + (2 * i + 1) * dashLength)
       @ctx.lineTo(x, top + (2 * i + 2) * dashLength)
     @ctx.stroke()
+    @ctx.lineWidth = 1
 
   # Decision point is any point with point.children.length != 1
   getNextDecisionPoint : (tree) ->

        if i != 0
          @drawEdge(xr, top + (i - 1) * @nodeDistance, xr, top + i * @nodeDistance)
    else if mode == MODE_NOCHAIN
      # Draw root, chain indicator and decision point
      @drawNode(xr, top, tree.id)
      @drawEdge(xr, top, xr, top + 0.5 * @nodeDistance)
      @drawChainIndicator(xr, top + 0.5 * @nodeDistance, top + 1.5 * @nodeDistance)
      @drawEdge(xr, top + 1.5 * @nodeDistance, xr, top + 2 * @nodeDistance)
      @drawNode(xr, top + 2 * @nodeDistance, decisionPoint.id)


    @recordWidths(tree)
    @drawTreeWithWidths(tree, 0, @width, @nodeDistance, mode)

  drawTreeWithWidths : (tree, left, right, top, mode = MODE_NORMAL) ->

    # get the decision point
    decisionPoint = @getNextDecisionPoint(tree)
