// Adorners
// Creates or updates the dragged Adorner.
private void ShowDraggedAdorner(Point currentPosition)
{
if (draggedAdorner == null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(sourceItemsControl);
draggedAdorner = new DraggedAdorner(draggedData, GetDragDropTemplate(sourceItemsControl),
sourceItemContainer,
adornerLayer);
}
draggedAdorner.SetPosition(currentPosition.X - initialMousePosition.X + initialMouseOffset.X,
currentPosition.Y - initialMousePosition.Y + initialMouseOffset.Y);
}