protected override void OnAttached()
{
if (DataContextProvider != null)
{
TryFindDataContextWhenNested = true;
}
else
{
DataContextProvider = new DataContextProvider();
}
AssociatedObject.Loaded += AssociatedObject_Loaded;
AssociatedObject.Unloaded += AssociatedObject_Unloaded;
if (AssociatedObject.DataContext is INotifyOutAnimation)
{
(AssociatedObject.DataContext as INotifyOutAnimation).RequestOutAnimation +=
AnimationBehavior_RequestOutAnimation;
_notifyOutAnimation = (AssociatedObject.DataContext as INotifyOutAnimation);
}
else
{
if (TryFindDataContextWhenNested)
{
var dc = DataContextProvider.GetDataContextOfType(AssociatedObject);
if (dc != null)
{
dc.RequestOutAnimation += AnimationBehavior_RequestOutAnimation;
_notifyOutAnimation = dc;
}
}
}
base.OnAttached();
}
void AssociatedObject_Unloaded(object sender, RoutedEventArgs e)
{
_notifyOutAnimation = null;
AssociatedObject.Unloaded -= AssociatedObject_Unloaded;
Detach();
}
