private bool VerifyRemoveChild(Node node)
{
ModifyChildrenResult result = this.owner.CanRemoveChild(node);
if (result == ModifyChildrenResult.Cancel)
{
return(false);
}
if (result == ModifyChildrenResult.Refuse)
{
throw new ArgumentException("Specified node may not be removed from the element");
}
return(true);
}
private bool VerifyAddChild(Node node)
{
ModifyChildrenResult result = this.owner.CanAddChild(node);
if (result == ModifyChildrenResult.Cancel)
{
return(false);
}
if (result == ModifyChildrenResult.Refuse)
{
throw new ArgumentException("Specified node is not accepted by the element");
}
if (node.parent != null)
{
throw new InvalidOperationException("ChildNode is already parented by a ChartElement instance.");
}
return(true);
}
