创建基于对话框的Windows应用程序(四)—— Edit Control、Combo Box的应用、Unicode转ANSI、Open File Dialog、文件读取、可变参数、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)、Combo Box控件,其中还包括Unicode转ANSI的方法、创建Open File Dialog、 读取文件、可变参数(这里用于生成日志)、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、Combo Box、Button控件如下:
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其中Edit Box的Properties设置为:
点击Combo Box右边三角箭头可以调整其下拉框的大小:
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Browse按钮的响应动作。
点击Browse按钮将创建Open File Dialog,并将选取的文件路径显示在一旁的Combo Box中:
其中WideCharToMultiByte函数实现了Unicode到ANSI的转换。
26、实现在Edit Control中添加文本并实现自动滚动:
其中当“count == 0”时,将屏蔽可变参数的使用。关于可变参数的使用可以在后面的代码中看到。
按下Open按钮,将根据Combo Box中的路径读取文件,并按ANSI文本格式显示在Edit Control中:
1 #include <Windows.h> 2 #include <windowsx.h> 3 #include <tchar.h> 4 #include <Shobjidl.h> 5 #include <mutex> 6 #include <string> 7 #include "Resource.h" 8 9 // Sets the dialog box icons 10 inline void chSETDLGICONS(HWND hWnd, int idi) { 11 SendMessage(hWnd, WM_SETICON, ICON_BIG, (LPARAM) 12 LoadIcon((HINSTANCE)GetWindowLongPtr(hWnd, GWLP_HINSTANCE), 13 MAKEINTRESOURCE(idi))); 14 SendMessage(hWnd, WM_SETICON, ICON_SMALL, (LPARAM) 15 LoadIcon((HINSTANCE)GetWindowLongPtr(hWnd, GWLP_HINSTANCE), 16 MAKEINTRESOURCE(idi))); 17 } 18 19 // The normal HANDLE_MSG macro in WindowsX.h does not work properly for dialog 20 // boxes because DlgProc returns a BOOL instead of an LRESULT (like 21 // WndProcs). This chHANDLE_DLGMSG macro corrects the problem: 22 #define chHANDLE_DLGMSG(hWnd, message, fn) \ 23 case (message): return (SetDlgMsgResult(hWnd, uMsg, \ 24 HANDLE_##message((hWnd), (wParam), (lParam), (fn)))) 25 26 // Main dialog 27 HWND g_hDlg; 28 29 std::mutex g_add; 30 // Adds a string to the "TextView" edit control 31 // Disable "..." when "count == 0", otherwise 32 // "count" can't be smaller than the (formatted) string size 33 void AddText(DWORD count, PCTSTR pszFormat, ...) { 34 std::lock_guard<std::mutex> lock(g_add); 35 36 static std::string text; 37 38 if (count == 0) 39 { 40 text.append(pszFormat); 41 } 42 else 43 { 44 va_list argList; 45 va_start(argList, pszFormat); 46 TCHAR *sz = new TCHAR[count]; 47 memset(sz, '\0', count); 48 _vstprintf_s(sz, count, pszFormat, argList); 49 va_end(argList); 50 text.append(sz); 51 delete[] sz; 52 } 53 54 HWND hEdit = GetDlgItem(g_hDlg, IDC_TEXTVIEW); 55 ::SendMessage(hEdit, 56 WM_SETREDRAW, FALSE/*关闭重绘*/, 0); 57 58 //Edit_SetText(hEdit, text.c_str()); 59 //::SetDlgItemText(g_hDlg/*包含Edit Control主窗口的句柄*/, 60 //IDC_TEXTVIEW/*Edit Control资源的编号*/, text.c_str()/*要输出的信息*/); 61 ::SendMessage(hEdit, WM_SETTEXT, false, (LPARAM)text.c_str()); 62 63 int iLine = (int)::SendMessage(GetDlgItem(g_hDlg, 64 IDC_TEXTVIEW)/*Edit Control的句柄*/, EM_GETLINECOUNT, 0/*忽略*/, 0/*忽略*/); 65 ::SendMessage(hEdit, EM_LINESCROLL, 0/*水平滚动的字符个数*/, 66 iLine/*垂直滚动的行数*/); 67 size_t iOutputLen = _tcslen(pszFormat); 68 ::SendMessage(hEdit, EM_SETSEL, iOutputLen/*要选中字符的起始位置*/, 69 iOutputLen/*要选中字符的结束位置*/); 70 71 ::SendMessage(hEdit, WM_SETREDRAW, TRUE/*打开重绘*/, 0); 72 } 73 74 INT_PTR WINAPI NewDlg_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { 75 switch (uMsg) 76 { 77 case WM_CLOSE: 78 EndDialog(hWnd, 0); 79 break; 80 } 81 82 return(FALSE); 83 } 84 85 void Dlg_OnCommand(HWND hWnd, int id, HWND hWndCtl, UINT codeNotify) { 86 HRESULT hr; 87 IFileDialog *pfd = NULL; 88 LPWSTR filePath = L""; 89 TCHAR file[MAX_PATH] = { 0 }; 90 COMDLG_FILTERSPEC rgSpec[] = 91 { 92 { TEXT(L"文本文档"), TEXT(L"*.txt") }, 93 { TEXT(L"所有文件"), TEXT(L"*.*") } 94 }; 95 TCHAR* buffer; 96 DWORD filesize; 97 HWND hWndComboBox; 98 static unsigned int num = 1; 99 switch (id) {100 case IDC_CHECKONTOP:101 SetWindowPos(hWnd, IsDlgButtonChecked(hWnd, IDC_CHECKONTOP)102 ? HWND_TOPMOST : HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);103 break;104 case IDC_BROWSE:105 hr = CoCreateInstance(CLSID_FileOpenDialog,106 NULL,107 CLSCTX_INPROC_SERVER,108 IID_PPV_ARGS(&pfd));109 FILEOPENDIALOGOPTIONS dwFlags;110 hr = pfd->GetOptions(&dwFlags);111 hr = pfd->SetOptions(dwFlags | FOS_FORCEFILESYSTEM);112 hr = pfd->SetFileTypes(2, rgSpec);113 hr = pfd->SetFileTypeIndex(1);114 hr = pfd->Show(hWnd);115 IShellItem * pShellItem;116 hr = pfd->GetResult(&pShellItem);117 if (hr == S_OK)118 {119 hr = pShellItem->GetDisplayName(SIGDN_DESKTOPABSOLUTEPARSING, &filePath);120 WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, filePath, MAX_PATH, file, 121 sizeof(file), NULL, NULL);122 SetDlgItemText(hWnd, IDC_EDITCOMBO, file);123 }124 break;125 case IDOPEN:126 GetDlgItemText(hWnd, IDC_EDITCOMBO, file, _countof(file));127 hWndComboBox = GetDlgItem(hWnd, IDC_EDITCOMBO);128 SendMessage(hWndComboBox, CB_ADDSTRING, 0, (LPARAM)file);129 HANDLE hFile;130 DWORD readsize;131 hFile = CreateFile(file, GENERIC_READ, FILE_SHARE_READ, NULL, 132 OPEN_EXISTING, NULL, NULL);133 if (hFile == INVALID_HANDLE_VALUE)134 {135 CloseHandle(hFile);136 break;137 }138 filesize = GetFileSize(hFile, NULL);139 buffer = new char[filesize + 1];140 ReadFile(hFile, buffer, filesize, &readsize, NULL);141 buffer[filesize] = 0;142 AddText(MAX_PATH + 32, _T("NO.%03d %s\r\n\r\n"), num, file);143 num++;144 AddText(0, buffer);145 delete[] buffer;146 AddText(0, "\r\n\r\n");147 CloseHandle(hFile);148 break;149 case IDCANCEL:150 SendMessage(hWnd, WM_CLOSE, 0, 0);151 break;152 153 }154 }155 156 BOOL Dlg_OnInitDialog(HWND hWnd, HWND hWndFocus, LPARAM lParam) {157 g_hDlg = hWnd;158 159 chSETDLGICONS(hWnd, IDI_ICON1);160 161 SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);162 CheckDlgButton(hWnd, IDC_CHECKONTOP, BST_CHECKED);163 164 return(TRUE);165 }166 167 INT_PTR WINAPI Dlg_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {168 switch (uMsg)169 {170 chHANDLE_DLGMSG(hWnd, WM_INITDIALOG, Dlg_OnInitDialog);171 chHANDLE_DLGMSG(hWnd, WM_COMMAND, Dlg_OnCommand);172 case WM_CLOSE:173 EndDialog(hWnd, 0);174 break;175 }176 177 return(FALSE);178 }179 180 int WINAPI WinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int) {181 DialogBoxParam(hinstExe, MAKEINTRESOURCE(IDD_DIALOG),182 NULL, Dlg_Proc, _ttoi(pszCmdLine));183 184 return(0);185 }
Win32WindowsApplication.cpp
26、此时按下F5 Start Debugging,可以检验所需功能皆已完成。
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http://www.cnblogs.com/lantingji/p/5886181.html
原标题:Creating Dialogbased Windows Application / 创建基于对话框的Windows应用程序(四)Edit Control、Combo Box的应用、Unicode转ANSI、Open File Dialog、文件读取、可变参数、文本框自动滚动 / VC++, Windows
关键词:Windows