/Samples/Chap08/Beeper2/Beeper2.d
D | 140 lines | 108 code | 28 blank | 4 comment | 3 complexity | 459068f0e96b820ee562384742d677a6 MD5 | raw file
- /+
- + Copyright (c) Charles Petzold, 1998.
- + Ported to the D Programming Language by Andrej Mitrovic, 2011.
- +/
- module Beeper2;
- import core.runtime;
- import core.thread;
- import std.conv;
- import std.math;
- import std.range;
- import std.string;
- import std.utf;
- 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;
- enum ID_TIMER = 1;
- 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 = "Beeper2";
- 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) GetStockObject(WHITE_BRUSH);
- 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
- "Beeper2 Timer Demo", // 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);
- switch (message)
- {
- case WM_CREATE:
- SetTimer (hwnd, ID_TIMER, 1000, &TimerProc);
- return 0;
- case WM_DESTROY:
- KillTimer (hwnd, ID_TIMER);
- PostQuitMessage (0);
- return 0;
- default:
- }
- return DefWindowProc (hwnd, message, wParam, lParam);
- }
- extern (Windows)
- void TimerProc(HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime)
- {
- static BOOL fFlipFlop = FALSE;
- HBRUSH hBrush;
- HDC hdc;
- RECT rc;
- MessageBeep (-1);
- fFlipFlop = !fFlipFlop;
- GetClientRect (hwnd, &rc);
- hdc = GetDC (hwnd);
- hBrush = CreateSolidBrush (fFlipFlop ? RGB(255, 0, 0) : RGB(0, 0, 255));
- FillRect (hdc, &rc, hBrush);
- ReleaseDC (hwnd, hdc);
- DeleteObject (hBrush);
- }