protected override FrameworkElement CreateMarkerCore(object dataItem)
{
VectorFieldChartItem item = new VectorFieldChartItem();
item.SetBinding(VectorFieldChartItem.StartPointProperty, locationBinding);
item.SetBinding(VectorFieldChartItem.DirectionProperty, directionBinding);
item.DataContext = dataItem;
return(item);
}
private static object CoerceEndPoint(DependencyObject d, object value)
{
VectorFieldChartItem item = (VectorFieldChartItem)d;
return(item.StartPoint + item.Direction);
}
private static void OnCommonPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
VectorFieldChartItem owner = (VectorFieldChartItem)d;
owner.CoerceValue(EndPointProperty);
}