I would like to create a chart with polylines that I can move the points after the chart is created.
I looked at the "Updating Data Points" sample in the WPF Sample Browser for WPF 23.2 as an example, but I would like to do this with disconnected lines.
I have looked at the XamDataChart ScatterPolylineSeries and the XamShapeChart with Polyline chart type. Both of these take a System.Windows.Point. Point doesn't implement INotifyPropertyChanged, so modifying them does not change the chart.
I tried implementing the ObservableDataPoint class in the example, but the charts won't display the data unless it's a System.WIndows.Point.
Is there a way to accomplish this?
I'm using .NET 8.
I am glad to hear that.
That works great, thanks!
Hello Josh,
My best recommendation to “move” the ScatterPolylineSeries would be to replace an existing Point in the underlying ShapeMemberPath’s collection to a new instance of a Point because as you mentioned, the X and Y properties of System.Windows.Point do not implement INotifyPropertyChanged. After doing this, you can call the ScatterPolylineSeries’ RenderSeries method and it will re-render with the change. I believe something along the lines of the following may help you, where the “Points” collection is the ShapeMemberPath of the ScatterPolylineSeries:
Point point = vm.Data[0].Points[50]; point.Y = 80;
Point newPoint = new Point(point.X, 80);
vm.Data[0].Points.Remove(point); vm.Data[0].Points.Insert(50, newPoint);
chart.Series[0].RenderSeries(false);
Please let me know if you have any other questions or concerns on this matter.