/** Sets the correct start and end dates and date format. */
protected void formatChartAxes(JFreeChart chart, DateTime start, DateTime end) {
XYPlot plot = chart.getXYPlot();
DateAxis axis = (DateAxis) plot.getDomainAxis();
axis.setMaximumDate(end.plusDays(1).toDateMidnight().toDate());
axis.setMinimumDate(start.toDateMidnight().toDate());
axis.setDateFormatOverride(new SimpleDateFormat("EEE d.M."));
axis.setStandardTickUnits(tickUnits);
plot.setDomainGridlinePaint(GRIDLINE_COLOR);
plot.setRangeGridlinePaint(GRIDLINE_COLOR);
}
