void RemoveInsertionAdorner()
{
if (this._insertionAdorner != null)
{
this._insertionAdorner.Detach();
this._insertionAdorner = null;
}
}
void CreateInsertionAdorner()
{
if (this._targetItemContainer != null)
{
// Here, I need to get adorner layer from targetItemContainer and not targetItemsControl.
// This way I get the AdornerLayer within ScrollContentPresenter, and not the one under AdornerDecorator (Snoop is awesome).
// If I used targetItemsControl, the adorner would hang out of ItemsControl when there's a horizontal scroll bar.
var adornerLayer = AdornerLayer.GetAdornerLayer(this._targetItemContainer);
this._insertionAdorner = new InsertionAdorner(this._hasVerticalOrientation, this._isInFirstHalf, this._targetItemContainer, adornerLayer);
}
}