public void RemoveChild (TreeNode child)
{
int idx = children.IndexOf (child);
if (idx < 0)
return;
children.Remove (child);
child.SetParent (null);
OnChildRemoved (child, idx);
}
public void AddChild (TreeNode child)
{
children.Add (child);
child.SetParent (this);
OnChildAdded (child);
}
public void AddChild (TreeNode child, int position)
{
children.Insert (position, child);
child.SetParent (this);
OnChildAdded (child);
}
private void OnChildRemoved (TreeNode child, int old_position)
{
if (ChildRemoved == null)
return;
ChildRemoved (this, child, old_position);
}
