Question

I’m making (time series) moutain chart using JFreeChart. So, i made 2 timeseries – the data one and the one with all range values are zero.

  TimeSeriesCollection dataset2 = new TimeSeriesCollection();
  dataset2.addSeries(close); //my data series/
  dataset2.addSeries(zeroseries); /zero series/

Then, i used XYDifferenceRenderer to fill the gap between 2 series with my desired color.

Code to create the chart and set renderer :

  final JFreeChart chart = garch_differencechart(url);//my method to create the chart//
  final ChartPanel chartPanel = new ChartPanel(chart);
  final XYPlot plot = (XYPlot) chart.getPlot();
  chart.setBackgroundPaint(Color.WHITE);
  plot.setBackgroundPaint(Color.WHITE);
  XYDifferenceRenderer renderer = new XYDifferenceRenderer();
  renderer.setPositivePaint(new Color(202, 225, 255));
  renderer.setSeriesPaint(0, new Color(72, 118, 255));
  renderer.setSeriesStroke(0, new BasicStroke(1.2f));
  plot.setRenderer(renderer);

Code to set GridLines visible :

 plot.setDomainGridlinesVisible(true);
 plot.setDomainGridlinePaint(new Color(234,234,234));
 plot.setDomainGridlineStroke(new BasicStroke(0.5f));


 plot.setRangeGridlinesVisible(true);
 plot.setRangeGridlinePaint(new Color(234,234,234));
 plot.setRangeGridlineStroke(new BasicStroke(0.5f));

However, the renderer covered the plot’s gridline (it seems that the gridline was painted before the XYDifferenceRenderer).

How could I get the plot with gridline on top of XYDifferenceRenderer?

Answer 1

The gridlines show though in the demos and API. An sscce would be dispositive, but I suspect your grid and fill paints just need more contrast.