I am having an issue with my Composite Annotation implementation.
I am using the example provided in the MeasureXyAnnotation.xaml that I found here.
My exception that is thrown (see exception attachment provided) complains about a missing Axis value.
In the public override void Update(ICoordinateCalculator xCoordCalc, ICoordinateCalculator yCoordCalc)
the yCoordCalc comes in with a null value. The xCoordCalc is populated and looks valid.
See attachment of my plotting area and well as the chart area. The composite annotation shows up alright, but as soon as I try to drag it the exception is immediately thrown.
I have no idea at this point why. I have tried to implement the annotation according to your example but obviously I am missing something.
Support getting this to work would be immensely appreciated.