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菜鸟的问题

liaoshuiqing 2002-05-10 02:21:17
我想知道通过向导生成的MDI应用程序的默认的菜单项:打开文件(OnFileOpen)的代码(完整的),请高手不吝赐教,谢谢!
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liaoshuiqing 2002-05-11
谢谢!
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shawn_liu 2002-05-10
BOOL CDocument::OnOpenDocument(LPCTSTR lpszPathName)
{
if (IsModified())
TRACE0("Warning: OnOpenDocument replaces an unsaved document.\n");

CFileException fe;
CFile* pFile = GetFile(lpszPathName,
CFile::modeRead|CFile::shareDenyWrite, &fe);
if (pFile == NULL)
{
ReportSaveLoadException(lpszPathName, &fe,
FALSE, AFX_IDP_FAILED_TO_OPEN_DOC);
return FALSE;
}

DeleteContents();
SetModifiedFlag(); // dirty during de-serialize

CArchive loadArchive(pFile, CArchive::load | CArchive::bNoFlushOnDelete);
loadArchive.m_pDocument = this;
loadArchive.m_bForceFlat = FALSE;
TRY
{
CWaitCursor wait;
if (pFile->GetLength() != 0)
Serialize(loadArchive); // load me
loadArchive.Close();
ReleaseFile(pFile, FALSE);
}
CATCH_ALL(e)
{
ReleaseFile(pFile, TRUE);
DeleteContents(); // remove failed contents

TRY
{
ReportSaveLoadException(lpszPathName, e,
FALSE, AFX_IDP_FAILED_TO_OPEN_DOC);
}
END_TRY
DELETE_EXCEPTION(e);
return FALSE;
}
END_CATCH_ALL

SetModifiedFlag(FALSE); // start off with unmodified

return TRUE;
}

void CMdiDoc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
// TODO: add storing code here
}
else
{
// TODO: add loading code here
}
}
回复
shawn_liu 2002-05-10
void CWinApp::OnFileOpen()
{
ASSERT(m_pDocManager != NULL);
m_pDocManager->OnFileOpen();
}

void CDocManager::OnFileOpen()
{
// prompt the user (with all document templates)
CString newName;
if (!DoPromptFileName(newName, AFX_IDS_OPENFILE,
OFN_HIDEREADONLY | OFN_FILEMUSTEXIST, TRUE, NULL))
return; // open cancelled

AfxGetApp()->OpenDocumentFile(newName);
// if returns NULL, the user has already been alerted
}

CDocument* CWinApp::OpenDocumentFile(LPCTSTR lpszFileName)
{
ASSERT(m_pDocManager != NULL);
return m_pDocManager->OpenDocumentFile(lpszFileName);
}

CDocument* CDocManager::OpenDocumentFile(LPCTSTR lpszFileName)
{
// find the highest confidence
POSITION pos = m_templateList.GetHeadPosition();
CDocTemplate::Confidence bestMatch = CDocTemplate::noAttempt;
CDocTemplate* pBestTemplate = NULL;
CDocument* pOpenDocument = NULL;

TCHAR szPath[_MAX_PATH];
ASSERT(lstrlen(lpszFileName) < _countof(szPath));
TCHAR szTemp[_MAX_PATH];
if (lpszFileName[0] == '\"')
++lpszFileName;
lstrcpyn(szTemp, lpszFileName, _MAX_PATH);
LPTSTR lpszLast = _tcsrchr(szTemp, '\"');
if (lpszLast != NULL)
*lpszLast = 0;
AfxFullPath(szPath, szTemp);
TCHAR szLinkName[_MAX_PATH];
if (AfxResolveShortcut(AfxGetMainWnd(), szPath, szLinkName, _MAX_PATH))
lstrcpy(szPath, szLinkName);

while (pos != NULL)
{
CDocTemplate* pTemplate = (CDocTemplate*)m_templateList.GetNext(pos);
ASSERT_KINDOF(CDocTemplate, pTemplate);

CDocTemplate::Confidence match;
ASSERT(pOpenDocument == NULL);
match = pTemplate->MatchDocType(szPath, pOpenDocument);
if (match > bestMatch)
{
bestMatch = match;
pBestTemplate = pTemplate;
}
if (match == CDocTemplate::yesAlreadyOpen)
break; // stop here
}

if (pOpenDocument != NULL)
{
POSITION pos = pOpenDocument->GetFirstViewPosition();
if (pos != NULL)
{
CView* pView = pOpenDocument->GetNextView(pos); // get first one
ASSERT_VALID(pView);
CFrameWnd* pFrame = pView->GetParentFrame();
if (pFrame != NULL)
pFrame->ActivateFrame();
else
TRACE0("Error: Can not find a frame for document to activate.\n");
CFrameWnd* pAppFrame;
if (pFrame != (pAppFrame = (CFrameWnd*)AfxGetApp()->m_pMainWnd))
{
ASSERT_KINDOF(CFrameWnd, pAppFrame);
pAppFrame->ActivateFrame();
}
}
else
{
TRACE0("Error: Can not find a view for document to activate.\n");
}
return pOpenDocument;
}

if (pBestTemplate == NULL)
{
AfxMessageBox(AFX_IDP_FAILED_TO_OPEN_DOC);
return NULL;
}

return pBestTemplate->OpenDocumentFile(szPath);
}

CDocument* CMultiDocTemplate::OpenDocumentFile(LPCTSTR lpszPathName,
BOOL bMakeVisible)
{
CDocument* pDocument = CreateNewDocument();
if (pDocument == NULL)
{
TRACE0("CDocTemplate::CreateNewDocument returned NULL.\n");
AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
return NULL;
}
ASSERT_VALID(pDocument);

BOOL bAutoDelete = pDocument->m_bAutoDelete;
pDocument->m_bAutoDelete = FALSE; // don't destroy if something goes wrong
CFrameWnd* pFrame = CreateNewFrame(pDocument, NULL);
pDocument->m_bAutoDelete = bAutoDelete;
if (pFrame == NULL)
{
AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
delete pDocument; // explicit delete on error
return NULL;
}
ASSERT_VALID(pFrame);

if (lpszPathName == NULL)
{
// create a new document - with default document name
SetDefaultTitle(pDocument);

// avoid creating temporary compound file when starting up invisible
if (!bMakeVisible)
pDocument->m_bEmbedded = TRUE;

if (!pDocument->OnNewDocument())
{
// user has be alerted to what failed in OnNewDocument
TRACE0("CDocument::OnNewDocument returned FALSE.\n");
pFrame->DestroyWindow();
return NULL;
}

// it worked, now bump untitled count
m_nUntitledCount++;
}
else
{
// open an existing document
CWaitCursor wait;
if (!pDocument->OnOpenDocument(lpszPathName))
{
// user has be alerted to what failed in OnOpenDocument
TRACE0("CDocument::OnOpenDocument returned FALSE.\n");
pFrame->DestroyWindow();
return NULL;
}
pDocument->SetPathName(lpszPathName);
}

InitialUpdateFrame(pFrame, pDocument, bMakeVisible);
return pDocument;
}
回复
yu_hl 2002-05-10
debug就很容易跟踪到。
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