首页 > 代码库 > Creating Dialogbased Win32 Application (4) / 创建基于对话框的Win32应用程序(四)Edit Control的应用、Unicode转ANSI、自动滚动 / Win32, VC++, Windows
Creating Dialogbased Win32 Application (4) / 创建基于对话框的Win32应用程序(四)Edit Control的应用、Unicode转ANSI、自动滚动 / Win32, VC++, Windows
创建基于对话框的Win32应用程序(四)——Edit Control的应用、Unicode转ANSI、自动滚动
之前的介绍中,我们用到了Button、Static Text、Checkbox这三个控件。这一节中我们将学习使用Edit Control(编辑框)控件,其中还包括Unicode转ANSI的方法、文本框自动滚动的功能等。
24、首先切换到Reasource View(Ctrl+Shift+E),找到待修改的主窗体,并从Toolbox(Ctrl+Atl+X)中添加Edit Control控件以及Button控件如下:
其中较大的Edit Box的Properties设置为:
较小的Edit Box的Properties可以保持默认设置。
更改控件ID后记得在reasource.h文件中将多余的定义删除或注释掉:
注意:在以代码形式打开reasource.h或.rc文件后若要回到Reasource View中查看编辑,须先将打开的各相关文件关闭。
25、在被调用的命令消息响应函数(Dlg_OnCommand)中添加对新增控件的响应操作。
点击Browse按钮创建Open File Dialog,并将选取的文件路径显示在一旁的编辑框中:
其中WideCharToMultiByte函数实现了Unicode到ANSI的转换。
在Edit Control中添加文本并实现自动滚动:
按下Open按钮,根据较小编辑框中的路径读取文件,并按ANSI文本格式显示在较大编辑框中:
1 #include <Windows.h> 2 #include <windowsx.h> 3 #include <tchar.h> 4 #include <Shobjidl.h> 5 #include <mutex> 6 #include "Resource.h" 7 8 // Sets the dialog box icons 9 inline void chSETDLGICONS(HWND hWnd, int idi) { 10 SendMessage(hWnd, WM_SETICON, ICON_BIG, (LPARAM) 11 LoadIcon((HINSTANCE)GetWindowLongPtr(hWnd, GWLP_HINSTANCE), 12 MAKEINTRESOURCE(idi))); 13 SendMessage(hWnd, WM_SETICON, ICON_SMALL, (LPARAM) 14 LoadIcon((HINSTANCE)GetWindowLongPtr(hWnd, GWLP_HINSTANCE), 15 MAKEINTRESOURCE(idi))); 16 } 17 18 // The normal HANDLE_MSG macro in WindowsX.h does not work properly for dialog 19 // boxes because DlgProc returns a BOOL instead of an LRESULT (like 20 // WndProcs). This chHANDLE_DLGMSG macro corrects the problem: 21 #define chHANDLE_DLGMSG(hWnd, message, fn) 22 case (message): return (SetDlgMsgResult(hWnd, uMsg, 23 HANDLE_##message((hWnd), (wParam), (lParam), (fn)))) 24 25 26 // Main dialog 27 HWND g_hDlg; 28 29 std::mutex g_add; 30 // Adds a string to the "TextView" edit control 31 void AddText(PCTSTR pszFormat, ...) { 32 std::lock_guard<std::mutex> lock(g_add); 33 34 va_list argList; 35 va_start(argList, pszFormat); 36 37 static TCHAR sz[10 * 1024]; 38 39 Edit_GetText(GetDlgItem(g_hDlg, IDC_TEXTVIEW), sz, _countof(sz)); 40 _vstprintf_s( 41 _tcschr(sz, TEXT(‘\0‘)), _countof(sz) - _tcslen(sz), 42 pszFormat, argList); 43 Edit_SetText(GetDlgItem(g_hDlg, IDC_TEXTVIEW), sz); 44 va_end(argList); 45 46 ::SendMessage(GetDlgItem(g_hDlg, IDC_TEXTVIEW), 47 WM_SETREDRAW, FALSE/*关闭重绘*/, 0); 48 49 //::SetDlgItemText(g_hDlg/*包含Edit Control主窗口的句柄*/, 50 //IDC_TEXTVIEW/*Edit Control资源的编号*/, pszFormat/*要输出的信息*/); 51 52 int iLine = (int)::SendMessage(GetDlgItem(g_hDlg, 53 IDC_TEXTVIEW)/*Edit Control的句柄*/, EM_GETLINECOUNT, 0/*忽略*/, 0/*忽略*/); 54 ::SendMessage(GetDlgItem(g_hDlg, IDC_TEXTVIEW), 55 EM_LINESCROLL, 0/*水平滚动的字符个数*/, iLine/*垂直滚动的行数*/); 56 57 size_t iOutputLen = _tcslen(pszFormat); 58 ::SendMessage(GetDlgItem(g_hDlg, IDC_TEXTVIEW), EM_SETSEL, 59 iOutputLen/*要选中字符的起始位置*/, iOutputLen/*要选中字符的结束位置*/); 60 61 ::SendMessage(GetDlgItem(g_hDlg, IDC_TEXTVIEW), 62 WM_SETREDRAW, TRUE/*打开重绘*/, 0); 63 } 64 65 INT_PTR WINAPI NewDlg_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { 66 switch (uMsg) 67 { 68 case WM_CLOSE: 69 EndDialog(hWnd, 0); 70 break; 71 } 72 73 return(FALSE); 74 } 75 76 void Dlg_OnCommand(HWND hWnd, int id, HWND hWndCtl, UINT codeNotify) { 77 HRESULT hr; 78 IFileDialog *pfd = NULL; 79 LPWSTR filePath = L""; 80 TCHAR file[MAX_PATH] = { 0 }; 81 COMDLG_FILTERSPEC rgSpec[] = 82 { 83 { TEXT(L"文本文档"), TEXT(L"*.txt") }, 84 { TEXT(L"所有文件"), TEXT(L"*.*") } 85 }; 86 87 TCHAR buffer[10240] = { 0 }; 88 switch (id) { 89 case IDC_CHECKONTOP: 90 SetWindowPos(hWnd, IsDlgButtonChecked(hWnd, IDC_CHECKONTOP) 91 ? HWND_TOPMOST : HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE); 92 break; 93 case IDC_BROWSE: 94 hr = CoCreateInstance(CLSID_FileOpenDialog, 95 NULL, 96 CLSCTX_INPROC_SERVER, 97 IID_PPV_ARGS(&pfd)); 98 FILEOPENDIALOGOPTIONS dwFlags; 99 hr = pfd->GetOptions(&dwFlags);100 hr = pfd->SetOptions(dwFlags | FOS_FORCEFILESYSTEM);101 typedef struct _COMDLG_FILTERSPEC {102 LPCWSTR pszName;103 LPCWSTR pszSpec;104 } COMDLG_FILTERSPEC;105 hr = pfd->SetFileTypes(2, rgSpec);106 hr = pfd->SetFileTypeIndex(1);107 hr = pfd->Show(hWnd);108 IShellItem * pShellItem;109 hr = pfd->GetResult(&pShellItem);110 if (hr == S_OK)111 {112 hr = pShellItem->GetDisplayName(SIGDN_DESKTOPABSOLUTEPARSING, &filePath);113 WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, filePath, MAX_PATH, file, 114 sizeof(file), NULL, NULL);115 SetDlgItemText(hWnd, IDC_OPENEDIT, file);116 }117 break;118 case IDOPEN:119 GetDlgItemText(hWnd, IDC_OPENEDIT, file, _countof(file));120 HANDLE hFile;121 DWORD readsize;122 hFile = CreateFile(file, GENERIC_READ, FILE_SHARE_READ, NULL, 123 OPEN_EXISTING, NULL, NULL);124 ReadFile(hFile, buffer, sizeof(buffer), &readsize, NULL);125 AddText(buffer);126 CloseHandle(hFile);127 break;128 case IDCANCEL:129 SendMessage(hWnd, WM_CLOSE, 0, 0);130 break;131 132 }133 }134 135 BOOL Dlg_OnInitDialog(HWND hWnd, HWND hWndFocus, LPARAM lParam) {136 g_hDlg = hWnd;137 138 chSETDLGICONS(hWnd, IDI_ICON1);139 140 SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);141 CheckDlgButton(hWnd, IDC_CHECKONTOP, BST_CHECKED);142 143 return(TRUE);144 }145 146 INT_PTR WINAPI Dlg_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {147 switch (uMsg)148 {149 chHANDLE_DLGMSG(hWnd, WM_INITDIALOG, Dlg_OnInitDialog);150 chHANDLE_DLGMSG(hWnd, WM_COMMAND, Dlg_OnCommand);151 case WM_CLOSE:152 EndDialog(hWnd, 0);153 break;154 }155 156 return(FALSE);157 }158 159 int WINAPI WinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int) {160 DialogBoxParam(hinstExe, MAKEINTRESOURCE(IDD_DIALOG),161 NULL, Dlg_Proc, _ttoi(pszCmdLine));162 163 return(0);164 }
26、此时按下F5 Start Debugging,可以检验所需功能皆已完成。
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Creating Dialogbased Win32 Application (4) / 创建基于对话框的Win32应用程序(四)Edit Control的应用、Unicode转ANSI、自动滚动 / Win32, VC++, Windows