Drawing Concentric Colored Zones

Hi Kurt,

Can Custom Annotations resolve this? The Annotations feature allows you to place shapes onto the chart. We have Box, Line, Text, LineArrow out of the box and you can create Custom annotations, as well as Composite Annotations (groups of annotations) for more complex shapes.

Ellipses can be created using CustomAnnotation. There is a thread here on Oval / Circle Annotations which is quite old. In the Custom Annotation documentation there is a section on how to create a custom annotation with four corners by templating BoxAnnotation. Have a look at

CustomAnnotation (X1,Y1, X2, Y2)

The CustomAnnotation type only has a single X1,Y1 control point. If
you need to create a CustomAnnotation with two control points
(X1,Y1,X2,Y2), we recommend templating and/or subclassing the
BoxAnnotation type.

For example, the following code

  <s:SciChartSurface.Annotations>
     <s:BoxAnnotation X1="2" X2="8" Y1="2" Y2="8" Background="#33FFFFFF"
                      BorderBrush="#55FFFFFF" BorderThickness="3" Padding="5">
        <s:BoxAnnotation.Template>
           <ControlTemplate TargetType="s:BoxAnnotation">
              <Border x:Name="PART_BoxAnnotationRoot"
                 Margin="{TemplateBinding Margin}"
                 Background="{TemplateBinding Background}"
                 BorderBrush="{TemplateBinding BorderBrush}"
                 BorderThickness="{TemplateBinding BorderThickness}"
                 CornerRadius="{TemplateBinding CornerRadius}">
                 <Viewbox Margin="{TemplateBinding Padding}">
                    <TextBlock Text="Hello CustomAnnotation World!"></TextBlock>
                 </Viewbox>
              </Border>
           </ControlTemplate>
        </s:BoxAnnotation.Template>
     </s:BoxAnnotation>
    </s:SciChartSurface.Annotations>
  

Which results in:

Try this technique, but substitute a WPF Ellipse shape in the control template.

Taking this a step further, use CompositeAnnotation to create an annotation group. This might allow you to place all concentric circles onto one single annotation and anything else you wanted in there, such as lines or text. See the documentation above for an example.

Let me know if this helps!

Best regards,
Andrew