Tutorial 3: Mixed Chart Graphics

This tutorial shows how to draw different types of chart graphics inside same Plot. Each Chart -derived component from the library is a Dashboard specialization that adds a single SeriesRenderer to the plot, e.g. BarChart adds a BarRenderer to its Plot by default. You can create additional renderers from different types and add them to a chart as in this example, or build a dashboard with multiple plots and renderers as demonstrated in next tutorial. The following sample code builds upon Tutorial 2, moving two of the Series to a LineRenderer.

1. Remove the low and high series and color assignments from previous tutorial code, leaving only open and close prices:

Java

// a series of daily opening prices
chart.getSeries().add(
    new MySeries(stockPrices, PriceType.open));

// a series of daily closing prices
chart.getSeries().add(
    new MySeries(stockPrices, PriceType.close));

// assign different colors to bar series
chart.getTheme().setCommonSeriesFills(
    Colors.Yellow, Colors.LightBlue);

2. Create a LineRenderer for the low and high prices:

Java

// display min and max prices as a line chart
ObservableList<Series> minMaxSeries = new ObservableList<>();
minMaxSeries.add(new MySeries(stockPrices, PriceType.low));
minMaxSeries.add(new MySeries(stockPrices, PriceType.high));

LineRenderer minMaxRenderer = new LineRenderer(minMaxSeries);

3. Set appearance attributes for the lines by setting renderer's SeriesStyle property. The Fills list here is only set for the legend items:

Java

PerSeriesStyle minMaxStyle = new PerSeriesStyle();
minMaxStyle.setStrokes(
    Colors.Red, Colors.Green);
minMaxStyle.setFills(
    Colors.Red, Colors.Green);
minMaxStyle.setStrokeThicknesses(List.of(4.0));
minMaxRenderer.setSeriesStyle(minMaxStyle);

4. Add the new renderer to both chart's Plot and to the legend box:

Java

chart.getPlot().getSeriesRenderers().add(minMaxRenderer);
chart.getLegendRenderer().getContent().add(minMaxRenderer);

5. Running the example now should show line graphics on top of the bars: