/// <summary>
/// Initializes a new instance of the class.
/// </summary>
public ObservedCollection(object obj, LayoutRoot layoutRoot)
{
Type objType = obj.GetType();
if (objType.IsGenericType)
{
if (objType.GetGenericTypeDefinition() == typeof(ObservableCollection <>))
{
// if object is of type ObservableCollection<> we subscribe to INotifyCollectionChanged events
_genericList = obj as IList;
_hasBindableItems = BindableObjectType.IsAssignableFrom(objType.GetGenericArguments()[0]);
// get event to register to it
var eventInfo = objType.GetEvent("CollectionChanged");
var handler = Delegate.CreateDelegate(eventInfo.EventHandlerType, this, nameof(OnCollectionChanged));
eventInfo.AddEventHandler(obj, handler);
}
else if (objType.GetGenericTypeDefinition() == typeof(List <>))
{
// if object is of type List<> we track changes each frame
_genericList = obj as IList;
_hasBindableItems = BindableObjectType.IsAssignableFrom(objType.GetGenericArguments()[0]);
layoutRoot.RegisterUpdateable(this);
}
}
}
/// <summary>
/// Adds change listener to object.
/// </summary>
private void AddChangeListener(BindingPath source, object sourceObject)
{
if (BindableObjectType.IsAssignableFrom(sourceObject.GetType()))
{
var bindableSourceObject = sourceObject as BindableObject;
bindableSourceObject.PropertyChanged += source.PropertyChanged;
}
else
{
if (!HasRegisteredInLayoutRoot)
{
LayoutRoot.RegisterUpdateable(this);
HasRegisteredInLayoutRoot = true;
}
}
}