private void DetachAdorners()
{
if (_insertAdorner != null)
{
_insertAdorner.Destroy();
_insertAdorner = null;
}
if (_dragAdorner != null)
{
_dragAdorner.Destroy();
_dragAdorner = null;
}
}
private void InitializeInsertAdorner(ItemsControl itemsControl, DragEventArgs e)
{
if (_insertAdorner == null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(itemsControl);
UIElement itemContainer = Helper.GetItemContainerFromPoint(itemsControl, e.GetPosition(itemsControl));
if (itemContainer != null)
{
bool isPointInTopHalf = Helper.IsPointInTopHalf(itemsControl, e);
bool isItemsControlOrientationHorizontal = Helper.IsItemControlOrientationHorizontal(itemsControl);
_insertAdorner = new InsertAdorner(isPointInTopHalf, isItemsControlOrientationHorizontal, itemContainer, adornerLayer);
}
}
}