public override void OnUserInput(object value)
{
if (NotificationGate.IsInbound)
{
// Use reflection to convert the collection to the ViewModel type
// (which must be compatible with List<T>, e.g. IEnumerable<T> or IList)
if (_translateIncomingList == null)
{
Type propType = ClassProperty.PropertyInfo.PropertyType;
Type elemType = (propType.GetInterfaces().Concat(new Type[] { propType })
.FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>)) ?? typeof(IEnumerable <object>))
.GetGenericArguments()[0];
MethodInfo mi = GetType().GetMethod("TranslateIncomingList").MakeGenericMethod(new Type[] { elemType });
_translateIncomingList = (Func <IEnumerable, IEnumerable>)Delegate.CreateDelegate(typeof(Func <IEnumerable, IEnumerable>), this, mi);
}
value = _translateIncomingList((IEnumerable)value);
ClassProperty.SetObjectValue(ObjectInstance.WrappedObject, value);
// If the UI object switches to a new collection, we can expect it to
// cancel its subscription to _collection.CollectionChanged and subscribe
// to the new collection instead. So let's adopt the collection as our
// own, if it happens to be ObservableCollection<object>.
_collection = value as ObservableCollection <object>;
}
}
public override void OnUserInput(object value)
{
if (NotificationGate.IsInbound)
{
var scheduler = UpdateScheduler.Begin();
try
{
value = TranslateIncommingValue(value);
ClassProperty.SetObjectValue(ObjectInstance.WrappedObject, value);
}
finally
{
if (scheduler != null)
{
using (NotificationGate.BeginOutbound())
{
foreach (IUpdatable updatable in scheduler.End())
{
updatable.UpdateNow();
}
}
}
}
}
}
protected override void SetValue(object value)
{
var scheduler = UpdateScheduler.Begin();
try
{
value = TranslateIncommingValue(value);
ClassProperty.SetObjectValue(ObjectInstance.WrappedObject, value);
}
finally
{
if (scheduler != null)
{
foreach (IUpdatable updatable in scheduler.End())
{
updatable.UpdateNow();
}
}
}
}