private void Unregister()
{
// Destroy it!
if (LinkPreview != null)
{
adornLayer.Remove(LinkPreview);
adornLayer = null;
LinkPreview = null;
}
}
private void Register()
{
// Create it!
if (LinkPreview == null)
{
adornLayer = AdornerLayer.GetAdornerLayer(graph_area_);
if (adornLayer == null)
{
throw new InvalidOperationException("Could not find the adorner layer");
}
LinkPreview = new LinkPreviewAdorner(graph_area_);
LinkPreview.IsHitTestVisible = false;
adornLayer.Add(LinkPreview);
}
}
