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<FONT COLOR="#AOAO99">Multiple views for a single document (MDI)</FONT></H3></CENTER>

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This article was contributed by <A HREF="mailto:aroman@medanet.ro">Adrian Roman</A>.

<P>I add here the code that could be used to add multiple views to a document, in a MDI application. I usually make database applications, and I don't want that the document
to be created/destroyed by the framework, so I create the document myself (and of course I destroy it J ), and in document's constructor I set the m_bAutoDelete flag to
FALSE. 

<P>The CMyApp class contains as public member a pointer to my document. I also make document templates for all views, and I keep the pointers in CMyApp. You should have
something like this in InitInstance():

<PRE><TT><FONT COLOR="#990000">
m_pView1Templ=new CMultiDocTemplate( IDR_VIEW1TYPE,
RUNTIME_CLASS( CMyDoc ),
RUNTIME_CLASS( CChildFrame ),
RUNTIME_CLASS( CView1 ) );
AddDocTemplate(m_pView1Templ);
// m_pView1Templ is member of CMyApp 
</FONT></TT></PRE>

<P>After you created all necessary document templates, add the following code:

<PRE><TT><FONT COLOR="#990000">
// create main MDI Frame window
CMainFrame* pMainFrame = new CMainFrame;
mp_doc=new CTimeClkDoc;
mp_doc->SetTitle("Just a demo");
CCreateContext context;
context.m_pCurrentDoc=mp_doc;
context.m_pNewViewClass=NULL;
context.m_pNewDocTemplate=NULL;
context.m_pLastView=NULL;
context.m_pCurrentFrame=NULL;
if (!pMainFrame->LoadFrame(IDR_MAINFRAME,WS_OVERLAPPEDWINDOW | FWS_ADDTOTITLE,NULL, &context ))
	return FALSE;
m_pMainWnd = pMainFrame;
</FONT></TT></PRE>

<P>This code will allow opening the application without any open view and also avoids the dialog box that asks to choose a document template. 
Add for each view command handlers similar with this one:
 
<PRE><TT><FONT COLOR="#990000">
void CMyApp::OnView1() 
{
	// TODO: Add your command handler code here
	CChildFrame* pFrame = new CChildFrame();
	CCreateContext context;
	context.m_pCurrentDoc=mp_doc; //that's the way I avoid to create new document every time I open a new view
	context.m_pNewViewClass=RUNTIME_CLASS(CView1);
	context.m_pNewDocTemplate=m_pView1Templ;
	context.m_pLastView=(((CMainFrame *)m_pMainWnd)->GetActiveFrame() ? ((CMainFrame *)m_pMainWnd)->GetActiveFrame()->GetActiveView() : NULL);
	context.m_pCurrentFrame=((CMainFrame *)m_pMainWnd)->GetActiveFrame();
	if (!pFrame->LoadFrame(IDR_VIEW1TYPE,WS_OVERLAPPEDWINDOW | FWS_PREFIXTITLE ,m_pMainWnd, &context ))return;
	pFrame->InitialUpdateFrame(mp_doc,TRUE);
}
</FONT></TT></PRE>


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