I am using an XYStepRenderer to draw a graph with two series. One series is represented with a continuous line and the other is represented via a dashed line. The result is like this:

Problem here is that at the right side of the graph, the continuous line completely hides the dashed line.
I would rather like the result to be like this (the dashed line is 'in front' and the gaps between the dashes are transparant):

How can I do this with jfreechart.
Thanks for the assistance,
Frederik.