void OnDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
var expression = GetBindingExpression(DataContextProperty);
if (expression != null)
{
var settings = expression.ResolvedSource as INotifyPropertyChanged;
var propertyName = expression.ResolvedSourcePropertyName;
if (settings != _settings || propertyName != _propertyName)
{
_settings = settings;
_propertyName = propertyName;
if (settings != null && propertyName != null)
{
var nudger = SettingsSerializer.FindNudger(settings, propertyName);
Nudger = nudger;
}
}
}
}
