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 }
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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时间： 2024-10-29 17:05:15