/// <summary>A node has been dragged over another node. Allow drop?</summary>
/// <param name="sender">Sending node</param>
/// <param name="e">Node arguments</param>
public void OnAllowDrop(object sender, AllowDropArgs e)
{
e.Allow = false;
Model parentModel = Apsim.Get(this.ApsimXFile, e.NodePath) as Model;
if (parentModel != null)
{
DragObject dragObject = e.DragObject as DragObject;
e.Allow = Apsim.IsChildAllowable(parentModel, dragObject.ModelType);
}
}