public bool IsAncestor(Topic topic)
{
if (topic == null || ParentTopic == null)
{
return(false);
}
if (ParentTopic == topic || ParentTopic.IsAncestor(topic))
{
return(true);
}
return(false);
}
Topic GetSibling(Topic from, bool forward, int level, Vector4 vector)
{
if (this.Level == level && this.Vector == vector)
{
return(this);
}
if (forward)
{
if (HasChildren)
{
if (Children.Contains(from) && from != LastChild)
{
return(from.NextSibling.GetSibling(this, forward, level, vector));
}
else if (from == ParentTopic)
{
return(FirstChild.GetSibling(this, forward, level, vector));
}
}
}
else
{
if (HasChildren)
{
if (Children.Contains(from) && from != FirstChild)
{
return(from.PreviousSibling.GetSibling(this, forward, level, vector));
}
else if (from == ParentTopic)
{
return(LastChild.GetSibling(this, forward, level, vector));
}
}
}
if (ParentTopic == null)
{
return(null);
}
else
{
return(ParentTopic.GetSibling(this, forward, level, vector));
}
}
public Topic GetSibling(bool forward, bool nested, bool wrap)
{
if (ParentTopic == null)
{
return(null);
}
if (nested)
{
return(GetNestedSibling(forward, wrap));
}
else
{
Topic next = GetNestedSibling(forward, false);
if (next != null)
{
return(next);
}
next = ParentTopic.GetSibling(this, forward, Level, Vector);
if (next != null)
{
return(next);
}
if (wrap && MindMap != null && MindMap.Root != null)
{
next = MindMap.Root.GetFirstTopic(forward, Level, Vector);
}
if (next == this)
{
return(null);
}
else
{
return(next);
}
}
}