private void NotifyMemberAccess(object value, MemberInfo memberInfo)
{
if (memberInfo is PropertyInfo && value is INotifyPropertyChanged)
{
lock (this)
{
List <MemberInfo> RegisteredProperties;
if (this.propertyNotifications.TryGetValue(value, out RegisteredProperties) == false)
{
DebugLogger.WriteLine(this, LoggingLevel.Verbose, () => $"Attaching changing event on value '{value}'");
DebugLogger.WriteLine(this, LoggingLevel.Verbose, () => $"Adding property '{memberInfo.Name}' to changing event of value '{value}'");
INotifyPropertyChanged NotifyPropertyChanged = (INotifyPropertyChanged)value;
PropertyChangedEventHandler Handler = WeakDelegate.Connect <NotifyChangeExpression <TYpeOfExpression>, INotifyPropertyChanged, PropertyChangedEventHandler, PropertyChangedEventArgs>(
this,
NotifyPropertyChanged,
(target, sender, e) => target.NotifyPropertyChanged(sender, e),
(source, handler) => source.PropertyChanged -= handler
);
NotifyPropertyChanged.PropertyChanged += Handler;
this.deregistrations.Add(delegate { NotifyPropertyChanged.PropertyChanged -= Handler; });
RegisteredProperties = new List <MemberInfo>();
this.propertyNotifications.Add(value, RegisteredProperties);
}
RegisteredProperties.Add(memberInfo);
}
}
}
private void DetachEventsFromProperty()
{
RegisteredProperties.ToList().ForEach(p => p.PropertyChanged -= OnPropertyChanged);
}
private void AttachEventsToViewModelProperty()
{
RegisteredProperties.ToList().ForEach(p => p.PropertyChanged += OnPropertyChanged);
}
internal static IEnumerable <LinqPropertyBase> RegisteredPropertiesForOwnerType(Type ownerType) => RegisteredProperties.Where(p => p.OwnerType == ownerType);