MFC - Multiple inheritance and serialization

#include "StdAfx.h"
#include "appdoc.h"

namespace GE_{ namespace App{

	IMPLEMENT_DYNCREATE(CAppDoc, CDocument)

	CAppDoc::CAppDoc(void)
	{
	}

	CAppDoc::~CAppDoc(void)
	{
	}

	BOOL CAppDoc::OnNewDocument()
	{
		if(!CDocument::OnNewDocument()) return false;
		_pRoot = new Data::CAssembled;  //will relese the old root
		_pRoot->_pDocument = this;

		_list.push_back(_pRoot);	//can be drawn
		
		return !!_pRoot;
	}
	
	void CAppDoc::Serialize(CArchive& ar)
	{
		//instantiate the archive associated maps
		Safe::SArchiveMaps maps(ar);

		//save and load the pointers
		if (ar.IsStoring())
		{
			ar << _pRoot;
			ar << _list;
		}
		else
		{
			ar >> _pRoot;
			ar >> _list;
		}
	}

	CRect CAppDoc::GetDocBounds() const
	{
		TList::const_iterator i;
		CRect rcDoc(0,0,1,1);
		for(i=_list.begin(); i!=_list.end(); i++)
		{
			if(! *i) continue;
			rcDoc |= (**i).GetBounds();
		}
		return rcDoc;
	}

}}