MFC文档视图结构中缺省的命令处理

bReplace ? AFX_IDS_SAVEFILE : AFX_IDS_SAVEFILECOPY,
OFN_HIDEREADONLY | OFN_PATHMUSTEXIST, FALSE, pTemplate))
return FALSE; // don't even attempt to save
if (bReplace && newName.IsEmpty())
{
newName = m_strTitle;
// check for dubious filename
int iBad = newName.FindOneOf(_T(" #%;/\\"));
if (iBad != -1)
if (pFile == NULL)
{
ReportSaveLoadException(lpszPathName, &fe,
TRUE, AFX_IDP_INVALID_FILENAME);
return FALSE;
}
//建立保存用的CArchive
CArchive saveArchive(pFile, CArchive::store | CArchive::bNoFlushOnDelete);
newName.ReleaseBuffer(iBad);
// append the default suffix if there is one
CString strExt;
if (pTemplate->GetDocString(strExt, CDocTemplate::filterExt) &&
BOOL CDocument::OnSaveDocument(LPCTSTR lpszPathName)
{
CFileException fe;
CFile* pFile = NULL;
pFile = GetFile(lpszPathName, CFile::modeCreate |
CFile::modeReadWrite | CFile::shareExclusive, &fe);
{
//出现打开文件对话框文件取得文件名
CString newName;
if (!DoPromptFileName(newName, AFX_IDS_OPENFILE,
OFN_HIDEREADONLY | OFN_FILEMUSTEXIST, TRUE, NULL))
return;
18.ID_APP_ABOUT
19.ID_APP_EXIT
20.ID_HELP_INDEX
21.ID_HELP_USING
22.ID_CONTEXT_HELP
23.ID_HELP
24.ID_DEFAULT_HELP
25.ID_NEXT_PANE
26.ID_PREV_PANE
11.缺省编辑控制ID
12.ID_WINDOW_NEW
13.ID_WINDOW_ARRANGE
14.ID_WINDOW_CASCADE
15.ID_WINDOW_TILE_HORZ
16.ID_WINDOW_TILE_VERT
17.ID_WINDOW_SPLIT
3.ID_FILE_SAVE
4.ID_FILE_SAVE_AS
5.ID_FILE_SAVE_COPY_AS
6.ID_FILE_CLOSE
7.ID_FILE_UPDATE
8.ID_FILE_PRINT_SETUP
9.ID_FILE_PRINT
10.ID_FILE_PRINT_PREVIEW
saveArchive.m_pDocument = this;
saveArchive.m_bForceFlat = FALSE;
TRY
{
CWaitCursor wait;
//使用文档类的序列化操作完成实际存档行为
Serialize(saveArchive); // save me
void CDocManager::OnFileNew()
{
if (m_templateList.IsEmpty())
{
TRACE0("Error: no document templates registered with CWinApp.\n");
AfxMessageBox(AFX_IDP_FAILED_TO_CREATE_DOC);
// if returns NULL, the user has already been alerted
}
2.ID_FILE_OPEN
CWinApp::OnFileOpen
调用m_pDocManager->OnFileOpen()
void CDocManager::OnFileOpen()
// bring up dialog prompting user
CNewTypeDlg dlg(&m_templateList);
int nID = dlg.DoModal();
if (nID == IDOK)
pTemplate = dlg.m_pSelectedTemplate;
{
CString newName = lpszPathName;
if (newName.IsEmpty())
{
CDocTemplate* pTemplate = GetDocTemplate();
ASSERT(pTemplate != NULL);
newName = m_strPathName;
}
return TRUE;
}
DoSave()的实现
BOOL CDocument::DoSave(LPCTSTR lpszPathName, BOOL bReplace)
//如果文件名参数为空，则让用户取名
// note: lpszPathName can be different than 'm_strPathName'
27.ID_OLE_INSERT_NEW
28.ID_OLE_EDIT_LINKS
29.ID_VIEW_TOOLBAR
30.ID_VIEW_STATUS_BAR
1.ID_FILE_NEW
CWinApp::OnFileNew
调用m_pDocManager->OnFileNew()
else
return; // none - cancel operation
}
ASSERT(pTemplate != NULL);
ASSERT_KINDOF(CDocTemplate, pTemplate);
//建立空文件
pTemplate->OpenDocumentFile(NULL);
//如果文件是只读,或已经不存在了
if (dwAttrib & FILE_ATTRIBUTE_READONLY)
{
//使用带NULL参数的DoSave
if (!DoSave(NULL))
{
TRACE0("Warning: File save with new name failed.\n");
}
CWaitCursor wait;
//保存,由OnSaveDocument完成
if (!OnSaveDocument(newName))
{
if (lpszPathName == NULL)
{
// be sure to delete the file
TRY
文档视图结构中，缺省的命令处理
在文档视图结构所构建的框架中，很多命令ID都有缺省的命令处理。很多功能都由他们完成，但这些功能在程序中不“可见”,不便于对程序的理解。
以下归纳了常见的缺省处理及其流程
在需要时候，可以重载这些函数以实现特定功能
1.ID_FILE_NEW
2.ID_FILE_OPEN
return TRUE; // success
}
4.ID_FILE_SAVE_AS
CDocument::OnFileSaveAs()
具体实现：调用NULL参数的DoSave(..)
void CDocument::OnFileSaveAs()
{
if (!DoSave(NULL))
return;
}
CDocTemplate* pTemplate = (CDocTemplate*)m_templateList.GetHead();
//如果含有多个文档模板，显示一个新建文档类型对话框
if (m_templateList.GetCount() > 1)
{
// more than one document template to choose from
return FALSE;
}
}
else
{
//使用DoSave(....)
if (!DoSave(m_strPathName))
{
TRACE0("Warning: File save failed.\n");
return FALSE;
}
TRUE, AFX_IDP_FAILED_TO_SAVE_DOC);
}
END_TRY
DELETE_EXCEPTION(e);