I'm trying to render a Venn diagram within a System.Windows.Forms.UserControl class. I added an NVennSeries to an NVennChart, and the NVennChart to the NChartControl.

I do all the setup within either my UserControl's constructor OnLoad() eventhandler. Everything renders fine when my NVennSeries 'AddVennContour()' call is right after my setup code, but when I move the 'AddVennContour()' method call of the NVennSeries to my UserControl's OnPaint() method, nothing happens. I know OnPaint() is being called anytime the window changes.

Any ideas? Thanks

My Code:

this.vennChartTitle = nevronChartControl.Labels.AddHeader("Spotfire Novartis Venn Diagram");
this.vennChartTitle.TextStyle.FontStyle = new NFontStyle("Times New Roman", 18, FontStyle.Italic);
this.vennChartTitle.TextStyle.ShadowStyle.Color = Color.BlueViolet;

this.nevronChartControl.Legends.Clear();
this.nevronChartControl.Charts.Clear();//Make sure we are starting fresh, with no Nevron Charts of any sort
this.nevronChartControl.Charts.Add(VennPlot);//Add the Nevron venn diagram component to the collection of Nevron Charts
this.VennPlot.Projection.SetPredefinedProjection(PredefinedProjection.Orthogonal);//Set the projection to Orthagonal
this.VennPlot.Series.Clear();

this.VennPlot.Series.Add(TheVennSeries);
this.TheVennSeries.Name = VennSeries;
this.TheVennSeries.Visible = true;




protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
NVennSeries vseries = this.VennPlot.Series[0] as NVennSeries;
vseries.ClearContours();//Remove any pre-existing venn rendering
vseries.AddVennContour(VennShape.Ellipse, new NPointF(15, 0), new NSizeF(50, 50), 0, 1);
}

I added Venn Contours within OnPaint() so that if a user re-sizes the main window, I my Venn Diagram will automatically adjust accordingly (the same way visualizations adjust in the Nevron Charts for Windows Forms - Examples project).

I have some other events attached to other controls to handle user data input changes.