GroupRenderer

GroupRenderer is a special implementation of XYSeriesRenderer that combines multiple instances of XYSeries into a single virtual series of s higher dimension. Examples of GroupRenderer are:

• BarRenderer
• CandlestickRenderer

Let’s take a quick look at CandlestickRenderer. A candlestick chart is basically a two two dimensional representation of a complex value; for every value of x a single candlestick is drawn, but there are four values (dimensions) that make up each candlestick:

• open
• close
• high
• low

When a series is added to the plot with a formatter associated with a renderer that extends GroupRenderer, all series added with formatters of the same type are automatically “grouped” together during rendering.