再谈 Windows 2000 “打开”文件对话框

/////////// CFileDialogEx: 封装 Windows-2000 风格的"打开"对话框.// class CFileDialogEx : public CFileDialog { DECLARE_DYNAMIC(CFileDialogEx)public: CFileDialogEx(BOOL bOpenFileDialog, // TRUE 为"打开", // FALSE 为 "另存为" LPCTSTR lpszDefExt = NULL, LPCTSTR lpszFileName = NULL, DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, LPCTSTR lpszFilter = NULL, CWnd* pParentWnd = NULL); // 重载 virtual int DoModal();protected: OPENFILENAMEEX m_ofnEx; // 新的 OPENFILENAME Windows 2000 版本 virtual BOOL OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult); // 处理不同通知消息的虚拟函数 virtual BOOL OnFileNameOK(); virtual void OnInitDone(); virtual void OnFileNameChange(); virtual void OnFolderChange(); virtual void OnTypeChange(); DECLARE_MESSAGE_MAP() //{{AFX_MSG(CFileDialogEx) //}}AFX_MSG};/////////////////////////////////////////////////////////////// FileDialogEx.cpp // #include "stdafx.h"#include #include "FileDialogEx.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endifstatic BOOL IsWin2000();///////////////////////////////////////////////////////////////////////////// CFileDialogExIMPLEMENT_DYNAMIC(CFileDialogEx, CFileDialog)CFileDialogEx::CFileDialogEx(BOOL bOpenFileDialog, LPCTSTR lpszDefExt, LPCTSTR lpszFileName, DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd) : CFileDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd){}BEGIN_MESSAGE_MAP(CFileDialogEx, CFileDialog) //{{AFX_MSG_MAP(CFileDialogEx) //}}AFX_MSG_MAPEND_MESSAGE_MAP()BOOL IsWin2000() { OSVERSIONINFOEX osvi; BOOL bOsVersionInfoEx; // 尝试调用 GetVersionEx 函数，使用 OSVERSIONINFOEX 结构, // 它被Windows 2000支持. // // 如果调用失败, 尝试使用 OSVERSIONINFO 结构. ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); if( !(bOsVersionInfoEx = GetVersionEx ((OSVERSIONINFO *) &osvi)) ) { // 如果 OSVERSIONINFOEX 不行, 就用 OSVERSIONINFO. osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO); if (! GetVersionEx ( (OSVERSIONINFO *) &osvi) ) return FALSE; } switch (osvi.dwPlatformId) { case VER_PLATFORM_WIN32_NT: if ( osvi.dwMajorVersion >= 5 ) return TRUE; break; } return FALSE; }int CFileDialogEx::DoModal(){ ASSERT_VALID(this); ASSERT(m_ofn.Flags & OFN_ENABLEHOOK); ASSERT(m_ofn.lpfnHook != NULL); // 仍然是个用户钩 // 文件缓冲初始化 ASSERT(AfxIsValidAddress(m_ofn.lpstrFile, m_ofn.nMaxFile)); DWORD nOffset = lstrlen(m_ofn.lpstrFile)+1; ASSERT(nOffset <= m_ofn.nMaxFile); memset(m_ofn.lpstrFile+nOffset, 0, (m_ofn.nMaxFile-nOffset)*sizeof(TCHAR)); // WINBUG: 这是一种"打开/保存"对话框的特殊情况, // 在它disable主窗口之前是需要处理的. // HWND hWndFocus = ::GetFocus(); BOOL bEnableParent = FALSE; m_ofn.hwndOwner = PreModal(); AfxUnhookWindowCreate(); if (m_ofn.hwndOwner != NULL && ::IsWindowEnabled(m_ofn.hwndOwner)) { bEnableParent = TRUE; ::EnableWindow(m_ofn.hwndOwner, FALSE); } _AFX_THREAD_STATE* pThreadState = AfxGetThreadState(); ASSERT(pThreadState->m_pAlternateWndInit == NULL); if (m_ofn.Flags & OFN_EXPLORER) pThreadState->m_pAlternateWndInit = this; else AfxHookWindowCreate(this); memset(&m_ofnEx, 0, sizeof(m_ofnEx)); memcpy(&m_ofnEx, &m_ofn, sizeof(m_ofn)); if (IsWin2000()) m_ofnEx.lStructSize = sizeof(m_ofnEx); int nResult; if (m_bOpenFileDialog) nResult = ::GetOpenFileName((OPENFILENAME*)&m_ofnEx); else nResult = ::GetSaveFileName((OPENFILENAME*)&m_ofnEx); memcpy(&m_ofn, &m_ofnEx, sizeof(m_ofn)); m_ofn.lStructSize = sizeof(m_ofn); if (nResult) ASSERT(pThreadState->m_pAlternateWndInit == NULL); pThreadState->m_pAlternateWndInit = NULL; // WINBUG: "打开/保存"对话框的特殊情况的第二部分. if (bEnableParent) ::EnableWindow(m_ofnEx.hwndOwner, TRUE); if (::IsWindow(hWndFocus)) ::SetFocus(hWndFocus); PostModal(); return nResult ? nResult : IDCANCEL;}BOOL CFileDialogEx::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult){ memcpy(&m_ofn, &m_ofnEx, sizeof(m_ofn)); m_ofn.lStructSize = sizeof(m_ofn); return CFileDialog::OnNotify( wParam, lParam, pResult);}////////////////////////////////////////////////////////////////////// 下列函数只是用来说明他们获得了调用，实际上，类库（MFC）内部的对话框// 过程是被挂钩的；如果你愿意的话，可以删除他们.//BOOL CFileDialogEx::OnFileNameOK(){ TRACE(_T("CFileDialogEx::OnFileNameOK\n")); return CFileDialog::OnFileNameOK();}void CFileDialogEx::OnInitDone(){ TRACE(_T("CFileDialogEx::OnInitDone\n")); CFileDialog::OnInitDone();}void CFileDialogEx::OnFileNameChange(){ TRACE(_T("CFileDialogEx::OnFileNameChange\n")); CFileDialog::OnFileNameChange();}void CFileDialogEx::OnFolderChange(){ TRACE(_T("CFileDialogEx::OnFolderChange\n")); CFileDialog::OnFolderChange();}void CFileDialogEx::OnTyp