void OnItemsChanged(ModelItemCollection oldItemsCollection, ModelItemCollection newItemsCollection)
{
if (oldItemsCollection != null)
{
oldItemsCollection.CollectionChanged -= this.OnCollectionChanged;
}
if (newItemsCollection != null)
{
newItemsCollection.CollectionChanged += this.OnCollectionChanged;
}
if (!isRegisteredWithParent)
{
CutCopyPasteHelper.RegisterWithParentViewElement(this);
isRegisteredWithParent = true;
}
populateOnLoad = false;
PopulateContent();
}
protected override void OnRender(DrawingContext drawingContext)
{
CutCopyPasteHelper.RegisterWithParentViewElement(this);
base.OnRender(drawingContext);
}