在CFileDialog对话框中添加控件.doc

在CFileDialog对话框中添加控件关键字：CFileDialog扩展类 ，OFNHookProc需求描述 ： 昨天遇到一个用户需求，在CFileDialog对话框（SAVE）中加入一个Check , 一个Edit， 一个Spin控件，dlg.Domodal()=IDOK返回时要同时获得Edit控件中的数据.实现方法： 如果只需要控制控件，用方法一即可，但如果需要获取数据，则只能用方法二。我最终用的就是方法二.方法一: 首先查找MSDN关于CFileDialog扩展的实现描述，上网查到实现预览图片式的CFILEDIALOG的例子。按照其思路从CFileDialog派生了一个新的类CFileDialogEX. 在类中添加以下代码#define WM_CHECKZOOMIN WM_USER+1856public: BOOL bZoomIn; UINT nMul; /1100 /前置声明-BOOL NEAR CALLBACK HandleNotify(HWND hDlg, LPOFNOTIFY pofn);UINT_PTR CALLBACK OFNHookProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam); / CFileDialogEx IMPLEMENT_DYNAMIC(CFileDialogEx, CFileDialog) CFileDialogEx:CFileDialogEx(BOOL bOpenFileDialog, LPCTSTR lpszDefExt, LPCTSTR lpszFileName, DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd) : CFileDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd) /这个四个常用标识位 m_ofn.Flags |= OFN_ENABLETEMPLATE |OFN_HIDEREADONLY |OFN_EXPLORER; /OFN_EXPLORER | OFN_ENABLEHOOK m_ofn.lpstrTitle = _T(高级保存对话框); m_ofn.hInstance = AfxGetInstanceHandle(); m_ofn.lpstrFilter = _T(*.bmp0*.BMP0所有文件 0 *.*0 ); m_ofn.lpTemplateName = MAKEINTRESOURCE(IDD_FILEDIALOG_EX); m_ofn.lpfnHook = (LPOFNHOOKPROC)OFNHookProc; /Hook function for the Comm Dlg/在这里处理我们感兴趣的消息，想要哪个，截哪个!UINT_PTR CALLBACK OFNHookProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) switch (uMsg) case WM_INITDIALOG: /初始化对话框上的控件 if(SendDlgItemMessage(hDlg, IDC_CHECK_ZOOMIN, BM_GETCHECK,0,0) = BST_UNCHECKED) :EnableWindow(GetDlgItem(hDlg,IDC_EDIT_ZOOMNUM),FALSE); :EnableWindow(GetDlgItem(hDlg,IDC_SPIN_ZOOMNUM),FALSE); :SetWindowText(GetDlgItem(hDlg, IDC_EDIT_ZOOMNUM),_T(1); /ShowWindow(button,SW_HIDE); break; case WM_DESTROY: /消毁对话框 LPOPENFILENAME lpOFN = (LPOPENFILENAME)GetWindowLong(hDlg, DWL_USER); break; case WM_COMMAND: /这里处理，IDC_CHECK_ZOOMIN命令 if (HIWORD(wParam) = BN_CLICKED) & (LOWORD(wParam) = IDC_CHECK_ZOOMIN) BOOL bZoomIn = TRUE; if(SendDlgItemMessage(hDlg, IDC_CHECK_ZOOMIN, BM_GETCHECK, 0, 0) = BST_CHECKED) bZoomIn = TRUE; :EnableWindow(GetDlgItem(hDlg,IDC_EDIT_ZOOMNUM),TRUE); :EnableWindow(GetDlgItem(hDlg,IDC_SPIN_ZOOMNUM),TRUE); else bZoomIn = FALSE; /:SetWindowText(GetDlgItem(hDlg, IDC_EDIT_ZOOMNUM),); :EnableWindow(GetDlgItem(hDlg,IDC_EDIT_ZOOMNUM),FALSE); :EnableWindow(GetDlgItem(hDlg,IDC_SPIN_ZOOMNUM),FALSE); HWND hParent = GetParent(hDlg); / 注意hDlg是新加的模板对话框句柄，它是CFileDialog对话框的子部分，要获取CFileDialog对话框的句柄需要用GetParent函数 PostMessage(hParent,WM_CHECKZOOMIN,(WPARAM)bZoomIn,(LPARAM)0); bZoomIn = FALSE; break; case WM_NOTIFY: HandleNotify(hDlg, (LPOFNOTIFY)lParam); break; return 0; /这里处理notify 消息BOOL NEAR CALLBACK HandleNotify(HWND hDlg, LPOFNOTIFY pofn) CFileDialogEx dlg(TRUE); switch (pofn-hdr.code) case CDN_SELCHANGE: /char szFileMAX_PATH; / Get the path of the selected file. /if (CommDlg_OpenSave_GetFilePath(GetParent(hDlg), szFile, sizeof(szFile) SetWindowText(buff); file.Close(); 结果测试。 CFileDlg dlg(TRUE);dlg.DoModal();通过指定资源ID ， 可以使用Wizard添加处理消息， OK 这正是我想要的， 按照它的方法，很快就实现了需求，调用如下/.h / Dialog Data/AFX_DATA(CFileDlg)enum IDD = IDD_FILEDIALOG_EX ;/AFX_DATA public: BOOL bZoomIn; UINT nMul; /1100 afx_msg void OnBnClickedCheckZoomin();afx_msg void OnDeltaposSpinZoomnum(NMHDR *pNMHDR, LRESULT *pResult);virtual BOOL OnInitDialog();afx_msg void OnEnChangeEditZoomnum();afx_msg void OnEnKillfocusEditZoomnum(); /.cppCFileDialogEx:CFileDialogEx(BOOL bOpenFileDialog, LPCTSTR lpszDefExt, LPCTSTR lpszFileName, DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd) : CFileDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd) /这个四个常用标识位 m_ofn.Flags |= OFN_ENABLETEMPLATE |OFN_HIDEREADONLY |OFN_EXPLORER; /OFN_EXPLORER | OFN_ENABLEHOOK m_ofn.lpstrTitle = _T(高级保存对话框); m_ofn.hInstance = AfxGetInstanceHandle(); m_ofn.lpstrFilter = _T(*.bmp0*.BMP0所有文件 0 *.*0 ); SetTemplate(0, IDD_FILEDIALOG_EX); BEGIN_MESSAGE_MAP(CFileDialogEx, CFileDialog) /ON_COMMAND() ON_BN_CLICKED(IDC_CHECK_ZOOMIN, &CFileDialogEx:OnBnClickedCheckZoomin) ON_NOTIFY(UDN_DELTAPOS, IDC_SPIN_ZOOMNUM, &CFileDialogEx:OnDeltaposSpinZoomnum) ON_EN_CHANGE(IDC_EDIT_ZOOMNUM, &CFileDialogEx:OnEnChangeEditZoomnum) ON_EN_KILLFOCUS(IDC_EDIT_ZOOMNUM, &CFileDialogEx:OnEnKillfocusEditZoomnum)END_MESSAGE_MAP() void CFileDialogEx:OnBnClickedCheckZoomin() / TODO: 在此添加控件通知处理程序代码 bZoomIn = !bZoomIn; GetDlgItem(IDC_EDIT_ZOOMNUM)-EnableWindow(bZoomIn); GetDlgItem(IDC_SPIN_ZOOMNUM)-EnableWindow(bZoomIn); void CFileDialogEx:OnDeltaposSpinZoomnum(NMHDR *pNMHDR, LRESULT *pResult) LPNMUPDOWN pNMUpDown = reinterpret_cast(pNMHDR); / TODO: 在此添加控件通知处理程序代码 if (pNMUpDown-iDelta 0) if (nMul 1) nMul-; else if (nMul SetWindowText(lpstr); *pResult = 0; BOOL CFileDialogEx:OnInitDialog() CFileDialog:OnInitDialog(); / TODO: 在此添加额外的初始化 GetDlgItem(IDC_EDIT_ZOOMNUM)-EnableWindow(FALSE); GetDlgItem(IDC_SPIN_ZOOMNUM)-EnableWindow(FALSE); GetDlgItem(IDC_EDIT_ZOOMNUM)-SetWindowText(_T(1); bZoomIn = FALSE; nMul = 1; return TRUE; / return TRUE unless you set the focus to a control / 异常: OCX 属性页应返回 FALSE void CFileDialogEx:OnEnChangeEditZoomnum() / TODO: 如果该控件是 RICHEDIT 控件，它将不 / 发送此通知，除非重写 CFileDialog:OnInitDialog() / 函数并调用 CRichEditCtrl().SetEventMask()， / 同时将 ENM_CHANGE 标志“或”运算到掩码中。 / TODO: 在此添加控件通知处理程序代码 CString strText; GetDlgItem(IDC_EDIT_ZOOMNUM)-GetWindowText(strText); nMul = _wtoi(strText); if ( (nMul 100) ) if (nMul 100) nMul = 100; wchar_t buff10; _itow( nMul, buff, 10 ); LPCTSTR lpstr = (LPCTSTR)buff; GetDlgItem(IDC_EDIT_ZOOMNUM)-SetWindowText(lpstr); void CFileDialogEx:OnEnKillfocusEditZoomnum() / TODO: 在此添加控件通知处理程序代码 CString strText; GetDlgItem(IDC_EDIT_ZOOMNUM)-GetWindowText(strText); n