C / C++ / MFC

<br />
CDocument* CSingleDocTemplate::OpenDocumentFile(LPCTSTR lpszPathName,<br />
	BOOL bMakeVisible)<br />
	// if lpszPathName == NULL => create new file of this type<br />
{<br />
	CDocument* pDocument = NULL;<br />
	CFrameWnd* pFrame = NULL;<br />
	BOOL bCreated = FALSE;      // => doc and frame created<br />
	BOOL bWasModified = FALSE;<br />
<br />
	if (m_pOnlyDoc != NULL)<br />
	{<br />
		// already have a document - reinit it<br />
		pDocument = m_pOnlyDoc;<br />
		if (!pDocument->SaveModified())<br />
			return NULL;        // leave the original one<br />
<br />
		pFrame = (CFrameWnd*)AfxGetMainWnd();<br />
		ASSERT(pFrame != NULL);<br />
		ASSERT_KINDOF(CFrameWnd, pFrame);<br />
		ASSERT_VALID(pFrame);<br />
	}<br />
	else<br />
	{<br />
		// create a new document<br />
		pDocument = CreateNewDocument();<br />
		ASSERT(pFrame == NULL);     // will be created below<br />
		bCreated = TRUE;<br />
	}<br />
<br />
	if (pDocument == NULL)<br />
	{<br />
		AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);<br />
		return NULL;<br />
	}<br />
	ASSERT(pDocument == m_pOnlyDoc);<br />

BobInNJ wrote:

I do nto remeber saying that it dies in DragAcceptFiles

Mark Salsbery
Microsoft MVP - Visual C++

if (pDocument == NULL)
{
    AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
    return NULL;
}
ASSERT(pDocument == m_pOnlyDoc);

Mark Salsbery wrote:

Actually, I'm missing something - I'm not seeing where it's possible for the assertion
to fail.

BobInNJ wrote:

pDocTemplate = new CSingleDocTemplate (
IDR_MAINFRAME,
RUNTIME_CLASS (CDocument),
RUNTIME_CLASS (CFrameWnd),
RUNTIME_CLASS (MyView)
);

<br />
	if (pDocument == NULL)<br />
	{<br />
		AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);<br />
		return NULL;<br />
	}<br />
	ASSERT(pDocument == m_pOnlyDoc);<br />

BobInNJ wrote:

Is this (above) the statement you are refering to.

<br />
CObject* CRuntimeClass::CreateObject()<br />
{<br />
	ENSURE(this);<br />
<br />
	if (m_pfnCreateObject == NULL)<br />
	{<br />
		TRACE(traceAppMsg, 0,<br />
			_T("Error: Trying to create object which is not ")<br />
			_T("DECLARE_DYNCREATE \nor DECLARE_SERIAL: %hs.\n"),<br />
			m_lpszClassName);<br />
		return NULL;<br />
	}<br />

<br />
    CSingleDocTemplate* pDocTemplate;<br />
    pDocTemplate = new CSingleDocTemplate (<br />
        IDR_MAINFRAME,<br />
        RUNTIME_CLASS (CDocument),<br />
        RUNTIME_CLASS (MyWindow),<br />
        RUNTIME_CLASS (MyView)<br />
    );<br />
    AddDocTemplate (pDocTemplate);<br />
    RegisterShellFileTypes (TRUE);<br />

<br />
    CSingleDocTemplate* pDocTemplate;<br />
    pDocTemplate = new CSingleDocTemplate (<br />
        IDR_MAINFRAME,<br />
        RUNTIME_CLASS (MyDocument),<br />
        RUNTIME_CLASS (MyWindow),<br />
        RUNTIME_CLASS (MyView)<br />
    );<br />
    AddDocTemplate (pDocTemplate);<br />
    RegisterShellFileTypes (TRUE);<br />

<br />
void CSingleDocTemplate::SetDefaultTitle(CDocument* pDocument)<br />
{<br />
	CString strDocName;<br />
	if (!GetDocString(strDocName, CDocTemplate::docName) ||<br />
		strDocName.IsEmpty())<br />
	{<br />
		// use generic 'untitled'<br />
		ENSURE(strDocName.LoadString(AFX_IDS_UNTITLED));<br />
	}<br />
	pDocument->SetTitle(strDocName);<br />
}<br />

>	sdi1.exe!CSingleDocTemplate::SetDefaultTitle(CDocument * pDocument=0x003d95e8)  Line 207	C++
 	sdi1.exe!CSingleDocTemplate::OpenDocumentFile(const wchar_t * lpszPathName=0x00000000, int bMakeVisible=1)  Line 141	C++
 	sdi1.exe!CDocManager::OnFileNew()  Line 848	C++
 	sdi1.exe!CWinApp::OnFileNew()  Line 22	C++
 	sdi1.exe!CWinApp::ProcessShellCommand(CCommandLineInfo & rCmdInfo={...})  Line 26	C++
 	sdi1.exe!MainApp::InitInstance()  Line 50 + 0xc bytes	C++
 	sdi1.exe!AfxWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, wchar_t * lpCmdLine=0x00020908, int nCmdShow=1)  Line 37 + 0xd bytes	C++
 	sdi1.exe!wWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, wchar_t * lpCmdLine=0x00020908, int nCmdShow=1)  Line 30	C++
 	sdi1.exe!__tmainCRTStartup()  Line 263 + 0x2c bytes	C
 	sdi1.exe!wWinMainCRTStartup()  Line 182	C
 	kernel32.dll!7c817067() 	
 	[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]	

BobInNJ wrote:

I am finding programs using the SDI model to be very hard to write and debug.

Mark Salsbery
Microsoft MVP - Visual C++

Hamid. wrote:

Its first time I use of New Message on this forum