/Samples/Chap09/head/head.d
D | 278 lines | 234 code | 35 blank | 9 comment | 11 complexity | d65f2fc25cc57f825c0bcf682dc9f4a7 MD5 | raw file
- /+
- + Copyright (c) Charles Petzold, 1998.
- + Ported to the D Programming Language by Andrej Mitrovic, 2011.
- +/
- module head;
- /+
- + todo: needs refactor due to wstring shenanigans.
- +/
- import core.runtime;
- import core.thread;
- import std.conv;
- import std.file;
- import std.math;
- import std.range;
- import std.string;
- import std.utf : count, toUTFz, UTFException;
- auto toUTF16z(S)(S s)
- {
- return toUTFz!(const(wchar)*)(s);
- }
- pragma(lib, "gdi32.lib");
- import core.sys.windows.windef;
- import core.sys.windows.winuser;
- import core.sys.windows.wingdi;
- import core.sys.windows.winbase;
- enum ID_LIST = 1;
- enum ID_TEXT = 2;
- enum MAXREAD = 8192;
- enum DIRATTR = (DDL_READWRITE | DDL_READONLY | DDL_HIDDEN | DDL_SYSTEM | DDL_DIRECTORY | DDL_ARCHIVE | DDL_DRIVES);
- enum DTFLAGS = (DT_WORDBREAK | DT_EXPANDTABS | DT_NOCLIP | DT_NOPREFIX);
- enum ID_TIMER = 1;
- enum TWOPI = (2 * PI);
- enum ID_SMALLER = 1; // button window unique id
- enum ID_LARGER = 2; // same
- enum BTN_WIDTH = "(8 * cxChar)";
- enum BTN_HEIGHT = "(4 * cyChar)";
- int idFocus;
- WNDPROC OldList;
- WNDPROC[3] OldScroll;
- HINSTANCE hInst;
- extern (Windows)
- int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
- {
- int result;
- try
- {
- Runtime.initialize();
- result = myWinMain(hInstance, hPrevInstance, lpCmdLine, iCmdShow);
- Runtime.terminate();
- }
- catch (Throwable o)
- {
- MessageBox(null, o.toString().toUTF16z, "Error", MB_OK | MB_ICONEXCLAMATION);
- result = 0;
- }
- return result;
- }
- int myWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
- {
- string appName = "head";
- HWND hwnd;
- MSG msg;
- WNDCLASS wndclass;
- wndclass.style = CS_HREDRAW | CS_VREDRAW;
- wndclass.lpfnWndProc = &WndProc;
- wndclass.cbClsExtra = 0;
- wndclass.cbWndExtra = 0;
- wndclass.hInstance = hInstance;
- wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
- wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
- wndclass.hbrBackground = cast(HBRUSH) (COLOR_BTNFACE + 1);
- wndclass.lpszMenuName = NULL;
- wndclass.lpszClassName = appName.toUTF16z;
- if (!RegisterClass(&wndclass))
- {
- MessageBox(NULL, "This program requires Windows NT!", appName.toUTF16z, MB_ICONERROR);
- return 0;
- }
- hwnd = CreateWindow(appName.toUTF16z, // window class name
- "head", // window caption
- WS_OVERLAPPEDWINDOW, // window style
- CW_USEDEFAULT, // initial x position
- CW_USEDEFAULT, // initial y position
- CW_USEDEFAULT, // initial x size
- CW_USEDEFAULT, // initial y size
- NULL, // parent window handle
- NULL, // window menu handle
- hInstance, // program instance handle
- NULL); // creation parameters
- ShowWindow(hwnd, iCmdShow);
- UpdateWindow(hwnd);
- while (GetMessage(&msg, NULL, 0, 0))
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- return msg.wParam;
- }
- extern (Windows)
- LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) nothrow
- {
- scope (failure) assert(0);
- static BOOL bValidFile;
- static HWND hwndList, hwndText;
- static RECT rect;
- static char[] szFile;
- //~ HANDLE hFile;
- HDC hdc;
- int cxChar, cyChar;
- PAINTSTRUCT ps;
- wchar[MAX_PATH + 1] szBuffer;
- switch (message)
- {
- case WM_CREATE:
- cxChar = LOWORD(GetDialogBaseUnits());
- cyChar = HIWORD(GetDialogBaseUnits());
- rect.left = 56 * cxChar;
- rect.top = 3 * cyChar;
- hwndList = CreateWindow("listbox", NULL,
- WS_CHILDWINDOW | WS_VISIBLE | LBS_STANDARD,
- cxChar, cyChar * 3,
- cxChar * 48 + GetSystemMetrics(SM_CXVSCROLL),
- cyChar * 24,
- hwnd, cast(HMENU)ID_LIST,
- cast(HINSTANCE)GetWindowLongPtr(hwnd, GWL_HINSTANCE),
- NULL);
- GetCurrentDirectory(MAX_PATH + 1, szBuffer.ptr);
- hwndText = CreateWindow("static", szBuffer.ptr,
- WS_CHILDWINDOW | WS_VISIBLE | SS_LEFT,
- cxChar, cyChar, cxChar * MAX_PATH, cyChar,
- hwnd, cast(HMENU)ID_TEXT,
- cast(HINSTANCE)GetWindowLongPtr(hwnd, GWL_HINSTANCE),
- NULL);
- OldList = cast(WNDPROC)SetWindowLongPtr(hwndList, GWL_WNDPROC,
- cast(LPARAM)&ListProc);
- SendMessage(hwndList, LB_DIR, DIRATTR, cast(LPARAM)"*.*".toUTF16z);
- return 0;
- case WM_SIZE:
- rect.right = LOWORD(lParam);
- rect.bottom = HIWORD(lParam);
- return 0;
- case WM_SETFOCUS:
- SetFocus(hwndList);
- return 0;
- case WM_COMMAND:
- if (LOWORD(wParam) == ID_LIST && HIWORD(wParam) == LBN_DBLCLK)
- {
- int i = SendMessage(hwndList, LB_GETCURSEL, 0, 0);
- if (i == LB_ERR)
- break;
- SendMessage(hwndList, LB_GETTEXT, i, cast(LPARAM)szBuffer.ptr);
- auto filename = to!string(szBuffer[0..wcslen(szBuffer.ptr)]);
- if (filename == "[..]")
- {
- bValidFile = false;
- SetCurrentDirectory((getcwd() ~ r"\..\").toUTF16z);
- SetWindowText(hwndText, getcwd.toUTF16z);
- SendMessage(hwndList, LB_RESETCONTENT, 0, 0);
- SendMessage(hwndList, LB_DIR, DIRATTR, cast(LPARAM)"*.*".toUTF16z);
- }
- else if (filename[0] == '[' && filename[$-1] == ']')
- {
- bValidFile = false;
- if (filename[1] == '-')
- {
- // drive
- SetCurrentDirectory((filename[2 .. $-2].toUpper ~ r":\").toUTF16z);
- SetWindowText(hwndText, getcwd.toUTF16z);
- SendMessage(hwndList, LB_RESETCONTENT, 0, 0);
- SendMessage(hwndList, LB_DIR, DIRATTR, cast(LPARAM)"*.*".toUTF16z);
- }
- else
- {
- // dir
- SetCurrentDirectory((getcwd ~ r"\" ~ filename[1 .. $-1]).toUTF16z);
- SetWindowText(hwndText, getcwd.toUTF16z);
- SendMessage(hwndList, LB_RESETCONTENT, 0, 0);
- SendMessage(hwndList, LB_DIR, DIRATTR, cast(LPARAM)"*.*".toUTF16z);
- }
- }
- else if (filename.isFile)
- {
- bValidFile = true;
- szFile = std.path.buildPath(getcwd, filename).dup;
- SetWindowText(hwndText, szFile.toUTF16z);
- }
- InvalidateRect(hwnd, NULL, TRUE);
- }
- return 0;
- case WM_PAINT:
- if (!bValidFile)
- break;
- auto hFile = to!string(szFile);
- char[] buffer;
- try
- {
- buffer = readText(hFile).dup;
- }
- catch (FileException exc)
- {
- break;
- }
- catch (UTFException exc)
- {
- break;
- }
- hdc = BeginPaint(hwnd, &ps);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- SetTextColor(hdc, GetSysColor(COLOR_BTNTEXT));
- SetBkColor (hdc, GetSysColor(COLOR_BTNFACE));
- DrawText(hdc, buffer.toUTF16z, buffer.count, &rect, DTFLAGS);
- EndPaint(hwnd, &ps);
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- return 0;
- default:
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
- extern (Windows)
- LRESULT ListProc(HWND hwnd, UINT message,
- WPARAM wParam, LPARAM lParam)
- {
- if (message == WM_KEYDOWN && wParam == VK_RETURN)
- SendMessage(GetParent(hwnd), WM_COMMAND, MAKELONG(1, LBN_DBLCLK), cast(LPARAM)hwnd);
- return CallWindowProc(OldList, hwnd, message, wParam, lParam);
- }