private void OnPreviewDragOver(object sender, DragEventArgs dragEventArgs)
{
if (!dragEventArgs.Data.GetDataPresent(typeof(TDataItem)))
{
return;
}
_dragAdorner?.Update(dragEventArgs.GetPosition(AssociatedObject));
}
private void InitializeAdornerTemplate(DragEventArgs dragEventArgs, TDataItem data)
{
if (data == null)
{
return;
}
if (DragDataTemplate == null)
{
return;
}
if (_dragAdorner != null)
{
return;
}
var adornerLayer = AdornerLayer.GetAdornerLayer(AssociatedObject);
_dragAdorner = new DragAdorner(data, DragDataTemplate, AssociatedObject, adornerLayer);
_dragAdorner?.Update(dragEventArgs.GetPosition(AssociatedObject));
}
