Using XyScatterRenderableSeries with ChartSeriesViewModel | Fast, Native Chart Controls for WPF, iOS, Android and Xamarin

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Hi folks,

I haven’t been able to produce scatter charts using a XyScatterRenderableSeries. To demonstrate, I took a sample project you sent me earlier and replaced one line as shown below:

_chartSeries = new ObservableCollection<IChartSeriesViewModel>();
//var renderableSeries = new FastLineRenderableSeries { SeriesColor = Colors.BlueViolet};
var renderableSeries = new XyScatterRenderableSeries { SeriesColor = Colors.BlueViolet};
_chartSeries.Add(new ChartSeriesViewModel(ds0, renderableSeries));

With the original FastLineRenderableSeries, I see the chart. But with XyScatterRenderableSeries, the data does not appear. (Annotations remain visible, of course.)

Am I doing something wrong, or does the ChartSeriesViewModel not work with scatter charts?

Thanks,
–George

WPF

yefchak asked 5 years ago

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Answers (2)

Came across this old question when I had a similar problem. It seems like today you can just do:

new XyScatterRenderableSeries
        {
            PointMarker = new Abt.Controls.SciChart.Visuals.PointMarkers.EllipsePointMarker()
        };

There are other point markers in the Abt.Controls.SciChart.Visuals.PointMarkers namespace (EllipsePointMarker, CrossPointMarker, SpritePointMarker, SquarePointMarker and TrianglePointMarker), which all derive from BasePointMarker.

I guess it’s possible to derive from BasePointMarker and make your own custom PointMarkers somehow.

Robert Evans answered 3 years ago
last edited 3 years ago

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Hi George,

You’ll have to set the PointMarker property on the XyScatterRenderableSeries to get it to work. It ignores SeriesColor and uses only the PointMarker.

I believe there are a few posts in the forums about creating point-markers in code, including a helper class somewhere which generates a control template from size & color.

I realise its not an ideal API – we’re working on improving our MVVM API for SciChart v2.0