问题
I am using JFreeChart to render a scatter plot with a couple thousand data points. I control the appearance/style of each ScatterPlotDataset by attaching a suitable XYLineAndShapeRendererper to each data set; eg. points in data set 1 appear as circles and points in data set 2 appear as squares. I would like the user to be able to dynamically assign a sub-style per point in each data set; eg. if the data set were books then the user might wish to color fiction blue and nonfiction red. Is there a way to do this without defining a new data set for each sub style?
Incidentally I am carting with XYPlot but I can switch to another chart type if necessary.
Thank you in advance.
回答1:
You might consider the approaches mentioned here. The first implements DrawingSupplier; the second extends DefaultDrawingSupplier to achieve a similar effect. Of course, you can always override getItemPaint(), as shown here.
来源：https://stackoverflow.com/questions/16752852/using-jfreechart-scatter-plots-is-there-a-way-to-subdivide-styles-for-data-sets