private JFreeChart makeChart() throws KeyedException { if (chartSeries.size() == 0) throw new IllegalStateException("addChartSeries() not called"); if (range == null) { for (ChartSeries s : chartSeries) { if (range == null) range = s.getTimeSeries().getRange(); else range = range.union(s.getTimeSeries().getRange()); } } // use number axis for dates, with special formatter DateAxis dateAxis = new DateAxis(); dateAxis.setDateFormatOverride(new CustomDateFormat("M/d/y")); if (range.getTimeDomain().getLabel().equals("workweek")) dateAxis.setTimeline(SegmentedTimeline.newMondayThroughFridayTimeline()); // combined plot with shared date axis CombinedDomainXYPlot plot = new CombinedDomainXYPlot(dateAxis); for (ChartSeries s : chartSeries) { makeSubPlot(plot, s); } // make the chart, remove the legend, set the title JFreeChart chart = new JFreeChart(plot); if (!withLegend) chart.removeLegend(); chart.setBackgroundPaint(Color.white); chart.setTitle(new TextTitle(title)); return chart; }
private float getStrokeWidth() { // determine the stroke width from the "density" of the data return Math.max(1f, 3f - 0.4f * (range.getSize() / 100)); }