void _frames_Removed(object sender, TrackedBindingListEventArgs<DocumentFrame> e)
{
e.Item.Document = null;
}
void _items_Removed(object sender, TrackedBindingListEventArgs<ListingItem> e)
{
e.Item.Parent = null;
}
void _frames_Added(object sender, TrackedBindingListEventArgs<DocumentFrame> e)
{
if (e.Item.Document != null) throw new InvalidOperationException();
e.Item.Document = this;
}
void _declarations_Removed(object sender, TrackedBindingListEventArgs<Declaration> e)
{
e.Item.Parent = null;
}
void _items_Added(object sender, TrackedBindingListEventArgs<ListingItem> e)
{
// This actually violates the (implicit) invariant that a parent of a node has that node as a child,
// and not just as a descendant:
e.Item.Parent = this.Parent;
}
void _declarations_Added(object sender, TrackedBindingListEventArgs<Declaration> e)
{
e.Item.Parent = this;
}
void _blocks_Removed(object sender, TrackedBindingListEventArgs<Block> e)
{
e.Item.Parent = null;
}
void _blocks_Added(object sender, TrackedBindingListEventArgs<Block> e)
{
e.Item.Parent = this;
}
void _members_Removed(object sender, TrackedBindingListEventArgs<EnumerationMember> e)
{
e.Item.Parent = null;
}
void _members_Added(object sender, TrackedBindingListEventArgs<EnumerationMember> e)
{
e.Item.Parent = this;
}