. You can find below a sample code snippet demonstrating how to achieve the illustrated behavior:
public RadForm1()
{
InitializeComponent();
this.radChartView1.CreateRenderer += radChartView1_CreateRenderer;
ScatterLineSeries scatterSeries = new ScatterLineSeries();
scatterSeries.DataPoints.Add(new ScatterDataPoint(15, 19));
scatterSeries.DataPoints.Add(new ScatterDataPoint(18, 10));
scatterSeries.DataPoints.Add(new ScatterDataPoint(13, 15));
scatterSeries.DataPoints.Add(new ScatterDataPoint(10, 8));
scatterSeries.DataPoints.Add(new ScatterDataPoint(5, 2));
scatterSeries.PointSize = new SizeF(8, 8);
this.radChartView1.Series.Add(scatterSeries);
ScatterLineSeries scatterSeries2 = new ScatterLineSeries();
scatterSeries2.DataPoints.Add(new ScatterDataPoint(2, 24));
scatterSeries2.DataPoints.Add(new ScatterDataPoint(7, 12));
scatterSeries2.DataPoints.Add(new ScatterDataPoint(15, 10));
scatterSeries2.DataPoints.Add(new ScatterDataPoint(18, 22));
scatterSeries2.DataPoints.Add(new ScatterDataPoint(20, 20));
scatterSeries2.Shape = new RoundRectShape(1);
scatterSeries2.PointSize = new SizeF(8, 8);
this.radChartView1.Series.Add(scatterSeries2);
CartesianGridLineAnnotation annotation1 = new CartesianGridLineAnnotation();
annotation1.Axis = this.radChartView1.Axes[0] as CartesianAxis;
annotation1.Value = 5.8;
annotation1.Label = "Some text";
annotation1.BorderColor = Color.Red;
annotation1.BorderDashStyle = DashStyle.Solid;
annotation1.BorderWidth = 1;
this.radChartView1.Annotations.Add(annotation1);
}
private void radChartView1_CreateRenderer(object sender, ChartViewCreateRendererEventArgs e)
{
e.Renderer = new CustomRenderer(e.Area as CartesianArea);
}
public class CustomRenderer : CartesianRenderer
{
public CustomRenderer(CartesianArea area) : base(area)
{
}
protected override void InitializeAnnotations(AnnotationDrawMode drawMode)
{
for (int i = 0; i < this.Area.Annotations.Count; i++)
{
if (this.Area.Annotations[i] is CartesianGridLineAnnotation)
{
this.DrawParts.Add(new CustomCartesianGridLineAnnotationDrawPart(this.Area.Annotations[i] as CartesianGridLineAnnotation, this));
}
}
}
}
public class CustomCartesianGridLineAnnotationDrawPart : CartesianGridLineAnnotationDrawPart
{
public CustomCartesianGridLineAnnotationDrawPart(CartesianGridLineAnnotation element, CartesianRenderer renderer) : base(element, renderer)
{
}
public override void Draw()
{
FieldInfo fi = typeof(CartesianGridLineAnnotation).GetField("model", BindingFlags.Instance | BindingFlags.NonPublic);
ChartAnnotationModel model = fi.GetValue(this.Element) as ChartAnnotationModel;
RectangleF rect = ChartRenderer.ToRectangleF(model.LayoutSlot);
rect.Offset(this.ViewportOffsetX, this.ViewportOffsetY);
Graphics graphics = this.Renderer.Surface as Graphics;
RadGdiGraphics radGraphics = new RadGdiGraphics(graphics);
Rectangle clipRect = ChartRenderer.ToRectangle(this.Element.View.GetArea<CartesianArea>().AreaModel.PlotArea.LayoutSlot);
clipRect.Offset((int)this.ViewportOffsetX, (int)this.ViewportOffsetY);
graphics.SetClip(clipRect);
GraphicsPath path = new GraphicsPath();
path.AddLine(rect.Location, new PointF(rect.Right, rect.Bottom));
BorderPrimitiveImpl border = new BorderPrimitiveImpl(this.Element, null);
border.PaintBorder(radGraphics, null, path, rect);
rect.Size = graphics.MeasureString(this.Element.Label, this.Element.Font);
rect.Offset(this.Element.PositonOffset.Width + 1, this.Element.PositonOffset.Height + 1);
TextParams tp = new TextParams();
tp.textOrientation = Orientation.Vertical;
tp.font = this.Element.Font;
tp.foreColor = this.Element.ForeColor;
tp.paintingRectangle = new RectangleF(rect.X, rect.Y, rect.Height, rect.Width);
tp.text = this.Element.Label;
FillPrimitiveImpl fill = new FillPrimitiveImpl(this.Element, null);
fill.PaintFill(radGraphics, null, rect);
radGraphics.DrawString(tp, new SizeF(rect.Height, rect.Width));
}
}
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Dess | Tech Support Engineer, Sr.