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作者：HY 来源：论坛 2007年10月20日
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| //OpenFile.rh #ifndef _OPENFILE_RH #define _OPENFILE_RH #define IDD_OPENFILE 100 //打开文件 #define IDM_FILEOPEN 106 //打开文件菜单命令 #define IDM_EXIT 107 //退出 #define IDE_EDIT 1022 //预展EDIT #define ID_PRESHOW 1023 //预展CheckBox按钮 #endif //OpenFile.h #define STRICT #ifdef RC_INVOKED #include <winuser.h> #else #include <windows.h> #endif #define MAX_PATH 260 long APIENTRY MainWndProc(HWND, UINT, UINT, LONG); BOOL CALLBACK OpenFileNameDlgProc(HWND ,UINT,UINT,LONG); BOOL InitApplication(HANDLE); BOOL InitInstance(HANDLE, int); void CALLBACK SetErrorMsg(HWND,UINT,const char *,char *); BOOL OpenTheFile( OPENFILENAME *); BOOL NEAR PASCAL TestNotify(HWND, LPOFNOTIFY); //OpenFile.RC #include "openfile.rh" #include <dlgs.h> IDD_OPENFILE DIALOG 0, 0, 251, 130 STYLE DS_3DLOOK | DS_CONTROL | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS FONT 9, "MS Sans Serif" { LTEXT "", stc32, 4, 4, 124, 125 CONTROL "以文本方式预展", ID_PRESHOW, "button", BS_AUTOCHECKBOX | WS_CHILD | WS_VISIBLE | WS_TABSTOP, 132, 121, 104, 9 CONTROL "", IDE_EDIT, "edit", ES_LEFT | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL | WS_CHILD | WS_VISIBLE | WS_BORDER | WS_TABSTOP, 132, 4, 116, 112 } OPENFILEMENU MENU { POPUP "&Options" { MENUITEM "&File Open...", IDM_FILEOPEN MENUITEM "E&xit", IDM_EXIT } } //OpenFile.h #include <windows.h> #include <commdlg.h> #include <dlgs.h> #include "openfile.rh" #include "openfile.h" HINSTANCE g_hInst; //应用程序的实例句柄 OPENFILENAME OpenFileName; //打开文件结构 char szFile[MAX_PATH]; //文件名 #pragma argsused int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) { MSG msg; OSVERSIONINFO osVer; osVer.dwOSVersionInfoSize = sizeof(osVer); if (!GetVersionEx(&osVer)) //取版本信息不成功返回 return (FALSE); if (osVer.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {//不在Window95环境下 MessageBox(NULL, "此程序需要在Windows 95下运行.", "警告", MB_OK ); return (FALSE); } if (!InitApplication(hInstance)) //初始化应用程序失败 return (FALSE); if (!InitInstance(hInstance, nCmdShow)) return (FALSE); while (GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return (msg.wParam); } BOOL InitApplication(HANDLE hInstance) { WNDCLASS wc; wc.style = 0; wc.lpfnWndProc = (WNDPROC)MainWndProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = hInstance; wc.hIcon = NULL; wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = GetStockObject(WHITE_BRUSH); wc.lpszMenuName = "OpenFileMenu"; wc.lpszClassName = "OpenFileNameClass"; return (RegisterClass(&wc)); } BOOL InitInstance( HANDLE hInstance, int nCmdShow) { HWND hWnd; g_hInst = hInstance; //保存当前应用程序的实例句柄 hWnd = CreateWindow( "OpenFileNameClass", "为你的OpenFile增加预视功能", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, g_hInst, NULL ); if (!hWnd) //窗口不能建立 return (FALSE); ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return (TRUE); } LONG APIENTRY MainWndProc( HWND hWnd, UINT message, UINT wParam, LONG lParam) { static HWND hwndEdit; CHAR lpszHello[] = "请从菜单上选择Open File，可看到OpenFile中的预视功能."; switch (message) { case WM_CREATE: OpenFileName.lStructSize = sizeof(OPENFILENAME); //结构大小 OpenFileName.hwndOwner = hWnd; OpenFileName.hInstance = g_hInst; OpenFileName.lpstrFilter= "文本文件名(*.txt)\0*.TXT\0所有文件(*.*)\0*.*\0\0"; OpenFileName.lpstrCustomFilter =NULL; OpenFileName.nMaxCustFilter = 0; OpenFileName.nFilterIndex = 0; OpenFileName.lpstrFile = szFile; OpenFileName.nMaxFile = sizeof(szFile); OpenFileName.lpstrFileTitle = NULL; OpenFileName.nMaxFileTitle = 0; OpenFileName.lpstrInitialDir = NULL; OpenFileName.lpstrTitle = "打开文件"; //窗口标题 OpenFileName.nFileOffset = 0; OpenFileName.nFileExtension = 0; OpenFileName.lpstrDefExt = "txt"; //扩展文件名 hwndEdit = CreateWindow( //建立一编辑窗口 "EDIT", NULL, WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_LEFT | ES_MULTILINE | ES_AUTOVSCROLL, 0, 0, 0, 0, hWnd, NULL, (HINSTANCE) GetWindowLong(hWnd, GWL_HINSTANCE),NULL); //设置信息 SendMessage(hwndEdit, WM_SETTEXT, 0, (LPARAM) lpszHello); return 0; case WM_SIZE: MoveWindow(hwndEdit, 0, 0, LOWORD(lParam), HIWORD(lParam), TRUE); return 0; case WM_COMMAND: switch( LOWORD( wParam )) { case IDM_FILEOPEN: //选中了打开文件菜单项 if(OpenTheFile( &OpenFileName)) SendMessage(hwndEdit, WM_SETTEXT, 0, (LPARAM)OpenFileName.lpstrFile); break; case IDM_EXIT: PostQuitMessage(0); break; default: return (DefWindowProc(hWnd, message, wParam, lParam)); } break; case WM_DESTROY: PostQuitMessage(0); break; default: return (DefWindowProc(hWnd, message, wParam, lParam)); } return (0); } //函数作用：打开文件 BOOL OpenTheFile(OPENFILENAME *OpenFileName) { OpenFileName->lCustData = NULL; OpenFileName->lpfnHook = (LPOFNHOOKPROC) OpenFileNameDlgProc; OpenFileName->lpTemplateName = MAKEINTRESOURCE(IDD_OPENFILE); OpenFileName->Flags =OFN_EXPLORER |OFN_HIDEREADONLY| OFN_ENABLEHOOK | OFN_ENABLETEMPLATE; return(GetOpenFileName(OpenFileName)); } BOOL NEAR PASCAL TestNotify(HWND hDlg, LPOFNOTIFY pofn) { HFILE hFile; //打开文件名柄 long dwBytesRead; long dwFileSize; LPSTR lpBuf; char szFile[MAX_PATH]; if (pofn->hdr.code!=CDN_SELCHANGE) //文件选择改变 return(FALSE); if (SendDlgItemMessage(hDlg,ID_PRESHOW,BM_GETCHECK,0,0L)==0) //用户没有选中预展按钮，则直接返回 return(FALSE); if (CommDlg_OpenSave_GetSpec(GetParent(hDlg), //获取选中的文件名 szFile, sizeof(szFile)) <= sizeof(szFile)) { hFile =_lopen((LPSTR)szFile,OF_READ); if (hFile==HFILE_ERROR) {SetErrorMsg(hDlg,IDE_EDIT,"文件[%s]不能开",szFile); return FALSE; //打开文件失败失败，返回 } dwFileSize =_llseek(hFile,0L,FILE_END); //取文件大小 if (dwFileSize == HFILE_ERROR) //失败，则返回 { SetErrorMsg(hDlg,IDE_EDIT,"移动文件[%s]指针出错.",szFile); _lclose(hFile); return FALSE; } _llseek(hFile,0L,FILE_BEGIN); lpBuf = (char *)GlobalAlloc( GMEM_FIXED, dwFileSize ); if (lpBuf == NULL ) //分配内存失败失败 {SetErrorMsg(hDlg,IDE_EDIT,"不能为文件[%s],分配内存",szFile); _lclose( hFile ); return FALSE; } dwBytesRead= _lread(hFile,(LPVOID)lpBuf, dwFileSize); //读文件到lpBUf处 if (dwBytesRead ==HFILE_ERROR) //读文件失败 { SetErrorMsg(hDlg,IDE_EDIT,"读文件[%s]失败",szFile); GlobalFree(lpBuf); _lclose( hFile ); return FALSE; } SetDlgItemText(hDlg,IDE_EDIT,lpBuf); _lclose(hFile); //关闭文件 GlobalFree(lpBuf);//释放分配的内存 return TRUE; } else return(TRUE); } #pragma argsused void CALLBACK SetErrorMsg(HWND hDlg,UINT id,const char *format,char *msg) { char buf[MAX_PATH]; wsprintf(buf,format,msg); SetDlgItemText(hDlg,id,buf); } #pragma argsused BOOL CALLBACK OpenFileNameDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) { char buf=0; OFNOTIFY of; switch (uMsg) { case WM_COMMAND: //用户在PreShow按钮上改变了显示 if(wParam==ID_PRESHOW) { if (!SendDlgItemMessage(hDlg,ID_PRESHOW,BM_GETCHECK,0,0L)) //没有选中,则将预展EDIT窗口设置为空 SetDlgItemText(hDlg,IDE_EDIT,&buf); else {of.hdr.code=CDN_SELCHANGE; //否则，调用TestNotify处理 TestNotify(hDlg,(LPOFNOTIFY)&of); } } return FALSE; case WM_NOTIFY: TestNotify(hDlg, (LPOFNOTIFY)lParam); return(TRUE); default: return FALSE; } } |
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