DataPoint Properties

Hi Sven,

It’s a little bit difficult in version 3 of SciChart, since the IPaletteProvider interface accepts X,Y value and returns Color. The interface is declared like this:

Color? OverrideColor(IRenderableSeries series, double xValue, double yValue);

What you can do is do a lookup in the paletteprovider, but this assumes your data has unique X-values. Also, if the data is sorted ascending in X the performance will be OK, but if not, it won’t be good.

public class MyPaletteProvider : IPaletteProvider
{
    // the original data
    public IList<ProcessedData>  ProcessedData { get; set; }

    // Inside your PaletteProvider implementation
    Color? OverrideColor(IRenderableSeries series, double xValue, double yValue)
    {
        // does a fast binary search on index
        int index = series.DataSeries.FindIndex(xValue, SearchMode.Exact); 
        if (index != -1)
        {
               return ProcessedData[i].IsValid ? Colors.Red : Colors:Green;      
        }
    }   
}

You should also see Correlating metadata with datapoints which shows a similar workaround to get additional data into tooltips.

Now something we’re researching right now is adding PointMetadata to the pipeline, e.g. the ability to tag any XY data-point with a business object (any object you define), and pass that through to the Rendering, PaletteProvider and Tooltip stages. That’s a work in progress and will be available soon(ish). More details on that later, but for now, the above workaround should do the trick.

Best regards,
Andrew