public override object ProvideValue(IServiceProvider serviceProvider)
{
if (serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideValueTarget valueProvider)
{
_bindingTarget = valueProvider.TargetObject as DependencyObject;
_bindingProperty = valueProvider.TargetProperty as DependencyProperty;
//DataContext, TODO other sources
var dataContextSourceElement = BindExtension.FindDataContextSource(_bindingTarget);
dataContextSourceElement.DataContextChanged += this.DataContextSource_DataContextChanged;
this.SetupBinding(dataContextSourceElement.DataContext);
}
//return default
return(_bindingProperty.DefaultMetadata.DefaultValue);
}
