draw a horizontal dashed line in Jfreechart gantt

Question

Does any one know how it possible to move/draw dashed line at specific position in Gantt chart? For example i have chart that look like this:

Link to image

and it hard to see where is tasks 1 bars and where task 2 bars and where task 3.

If it possible to draw horizontal lines not in line of 1,2,3 but after whole series to make clear visual separator.

Thanks

Answer 1

You probably want one of the org.jfree.chart.annotations such as CategoryLineAnnotation.