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SDK源码分析 15
1 #include <windows.h> 2 #define ID_LIST 1 3 #define ID_TEXT 2 4 #define MAXREAD 8192 5 #define DIRATTR (DDL_READWRITE|DDL_READONLY|DDL_HIDDEN|DDL_SYSTEM| 6 DDL_DIRECTORY|DDL_ARCHIVE|DDL_DRIVES) 7 #define DTFLAGS (DT_WORDBREAK|DT_EXPANDTABS|DT_NOCLIP|DT_NOPREFIX) 8 9 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); 10 LRESULT CALLBACK ListProc(HWND, UINT, WPARAM, LPARAM); 11 WNDPROC OldList; 12 13 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int nCmdShow) 14 { 15 WNDCLASS wndclass; 16 HWND hWnd; 17 MSG msg; 18 TCHAR szClassName[] = TEXT("MyClass"), szWindowsName[] = TEXT("MyWindows"); 19 20 wndclass.cbClsExtra = 0; 21 wndclass.cbWndExtra = 0; 22 wndclass.hbrBackground = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));//(HBRUSH)GetStockObject(WHITE_BRUSH); 23 wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); 24 wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); 25 wndclass.hInstance = hInstance; 26 wndclass.lpfnWndProc = WndProc; 27 wndclass.lpszClassName = szClassName; 28 wndclass.lpszMenuName = NULL; 29 wndclass.style = CS_VREDRAW | CS_HREDRAW; 30 31 if (!RegisterClass(&wndclass)) 32 { 33 MessageBox(hWnd, TEXT("The Application on Windows NT!"), TEXT("ERROR~"), MB_OK); 34 } 35 36 hWnd = CreateWindow(szClassName, 37 szWindowsName, 38 WS_OVERLAPPEDWINDOW, 39 CW_USEDEFAULT, 40 CW_USEDEFAULT, 41 CW_USEDEFAULT, 42 CW_USEDEFAULT, 43 NULL, NULL, hInstance, NULL); 44 ShowWindow(hWnd, nCmdShow); 45 UpdateWindow(hWnd); 46 47 while (GetMessage(&msg, NULL, NULL, NULL)) 48 { 49 TranslateMessage(&msg); 50 DispatchMessage(&msg); 51 } 52 return msg.wParam; 53 } 54 55 LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) 56 { 57 static BOOL bValidFile; 58 static BYTE buffer[MAXREAD]; 59 static HWND hWndList, hWndText; 60 static RECT rect; 61 static TCHAR szFile[MAX_PATH + 1]; 62 HANDLE hFile; 63 int i, cxChar, cyChar; 64 TCHAR szBuffer[MAX_PATH + 1]; 65 PAINTSTRUCT ps; 66 HDC hdc; 67 68 switch (msg) 69 { 70 case WM_CREATE: 71 cxChar = LOWORD(GetDialogBaseUnits()); 72 cyChar = HIWORD(GetDialogBaseUnits()); 73 74 rect.left = 20 * cxChar;//矩形位置 左边 =20*cxchar 75 rect.top = 3 * cyChar;//矩形位置 顶边 =3*cyChar 76 77 //创建 一个列表框 78 hWndList = CreateWindow(TEXT("listbox"), NULL, 79 WS_CHILDWINDOW | WS_VISIBLE | LBS_STANDARD, 80 cxChar, cyChar * 3, 81 cxChar * 13 + GetSystemMetrics(SM_CXVSCROLL), 82 cyChar * 10, 83 hWnd, (HMENU)ID_LIST, 84 (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), NULL); 85 86 //获取当前目录 保存到szBuffer 87 GetCurrentDirectory(MAX_PATH + 1, szBuffer); 88 89 //创建一个 静态文本框 左对齐 90 hWndText = CreateWindow(TEXT("static"), szBuffer, 91 WS_CHILDWINDOW | WS_VISIBLE | SS_LEFT, 92 cxChar, cyChar, cxChar*MAX_PATH, cyChar, 93 hWnd, (HMENU)ID_TEXT, (HINSTANCE)GetWindowLong(hWnd, GWL_HINSTANCE), NULL); 94 95 //窗口子类化 列表框 返回旧 过程 96 OldList = (WNDPROC)SetWindowLong(hWndList, GWL_WNDPROC, (LPARAM)ListProc); 97 98 //发送消息给列表框 99 SendMessage(hWndList, LB_DIR, DIRATTR, (LPARAM)TEXT("*.*")); 100 return 0; 101 case WM_SIZE: 102 rect.bottom = LOWORD(lParam); 103 rect.right = HIWORD(lParam); 104 //设置矩形范围 105 return 0; 106 case WM_COMMAND: 107 if (LOWORD(wParam) == ID_LIST && HIWORD(wParam) == LBN_DBLCLK)//如果是列表框消息 和 列表框双击 108 { 109 if (LB_ERR == (i = SendMessage(hWndList, LB_GETCURSEL, 0, 0)))//如果出错就跳出 110 break; 111 SendMessage(hWndList, LB_GETTEXT, i, (LPARAM)szBuffer);//发送 获取文本的消息 保存到szBuffer 112 113 114 //打开文件名:szBuffer 只读 只读请求 空 文件必须要存在 如果返回INVALID_HANDLE_VALUE 代表出错 115 if (INVALID_HANDLE_VALUE != (hFile = CreateFile(szBuffer, 116 GENERIC_READ, FILE_SHARE_READ, NULL, 117 OPEN_EXISTING, 0, NULL))) 118 { 119 CloseHandle(hFile);//关闭文件句柄 120 bValidFile = TRUE;//标记真 121 lstrcpy(szFile, szBuffer);//字符串拷贝 到szFile 122 GetCurrentDirectory(MAX_PATH + 1, szBuffer);//测试 文件是否子文件 123 if (szBuffer[lstrlen(szBuffer) - 1] != ‘\\‘)//如果最后的内容不是 ‘\\‘ 124 { 125 lstrcat(szBuffer, TEXT("\\")); //字符串szBuffer加入 ‘\\‘ 126 } 127 SetWindowText(hWndText, lstrcat(szBuffer, szFile));//设置静态文本框内容 128 } 129 else 130 { 131 bValidFile = FALSE;//标记关闭 132 szBuffer[lstrlen(szBuffer) - 1] = ‘\0‘;//加入结束符号 133 if (!SetCurrentDirectory(szBuffer + 1))//改变当前目录 取反 134 { 135 szBuffer[3] = ‘:‘;//字符串加入 136 szBuffer[4] = ‘\0‘;//字符串加入 137 SetCurrentDirectory(szBuffer + 2);//更改新的的 盘符 138 } 139 GetCurrentDirectory(MAX_PATH + 1, szBuffer);//获取当前内容 140 SetWindowText(hWndText, szBuffer);//设置文本 141 SendMessage(hWndList, LB_RESETCONTENT, 0, 0); 142 SendMessage(hWndList, LB_DIR, DIRATTR, (LPARAM)TEXT("*.*")); 143 } 144 InvalidateRect(hWnd, NULL, TRUE);//立即重绘 145 } 146 return 0; 147 case WM_PAINT: 148 if (!bValidFile)//如果没在读取 149 break; 150 if (INVALID_HANDLE_VALUE =http://www.mamicode.com/= (hFile = CreateFile(szFile, 151 GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL)))//打开文件 失败 152 { 153 bValidFile = FALSE;//标记关闭 跳出 154 break; 155 } 156 ReadFile(hFile, buffer, MAXREAD, (LPDWORD)&i, NULL);//读取文件内容 157 CloseHandle(hFile);//关闭文件 158 159 hdc = BeginPaint(hWnd, &ps); 160 161 SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT)); 162 SetTextColor(hdc, GetSysColor(COLOR_BTNTEXT)); 163 SetBkColor(hdc, GetSysColor(COLOR_BTNFACE)); 164 DrawTextA(hdc, (LPCSTR)buffer, i, &rect, DTFLAGS);//画出文本 165 166 EndPaint(hWnd, &ps); 167 return 0; 168 case WM_DESTROY: 169 PostQuitMessage(0); 170 return 0; 171 } 172 173 return DefWindowProc(hWnd, msg, wParam, lParam); 174 } 175 176 LRESULT CALLBACK ListProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) 177 { 178 if(msg==WM_KEYDOWN && wParam ==VK_RETURN) 179 { 180 SendMessage(GetParent(hWnd), WM_COMMAND, MAKELONG(1, LBN_DBLCLK), (LPARAM)hWnd); 181 } 182 return CallWindowProc(OldList, hWnd, msg, wParam, lParam); 183 }
SDK源码分析 15
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