/Samples/Chap20/RndRctMT/RndRctMT.d
D | 171 lines | 138 code | 29 blank | 4 comment | 8 complexity | e8e4f42c1c99fa87b7a2c339e025934d MD5 | raw file
- /+
- + Copyright (c) Charles Petzold, 1998.
- + Ported to the D Programming Language by Andrej Mitrovic, 2011.
- +/
- module RndRctMT;
- import core.memory;
- import core.runtime;
- import core.thread;
- import std.algorithm : min, max;
- import std.concurrency;
- import std.conv;
- import std.math;
- import std.random;
- import std.range;
- import std.string;
- import std.utf;
- auto toUTF16z(S)(S s)
- {
- return toUTFz!(const(wchar)*)(s);
- }
- pragma(lib, "gdi32.lib");
- pragma(lib, "comdlg32.lib");
- pragma(lib, "winmm.lib");
- import core.sys.windows.windef;
- import core.sys.windows.winuser;
- import core.sys.windows.wingdi;
- import core.sys.windows.winbase;
- import core.sys.windows.commdlg;
- import core.sys.windows.mmsystem;
- alias win32.winuser.MessageBox MessageBox;
- string appName = "RndRctMT";
- string description = "Random Rectangles";
- 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)
- {
- hinst = hInstance;
- HACCEL hAccel;
- 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 = appName.toUTF16z;
- 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
- description.toUTF16z, // 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;
- }
- __gshared HWND hwndGlob;
- __gshared int cxClient, cyClient;
- void ThreadFunc()
- {
- HBRUSH hBrush;
- HDC hdc;
- int xLeft, xRight, yTop, yBottom, iRed, iGreen, iBlue;
- while (true)
- {
- if (cxClient != 0 || cyClient != 0)
- {
- xLeft = uniform(0, cxClient);
- xRight = uniform(0, cxClient);
- yTop = uniform(0, cyClient);
- yBottom = uniform(0, cyClient);
- iRed = uniform(0, 255);
- iGreen = uniform(0, 255);
- iBlue = uniform(0, 255);
- hdc = GetDC(hwndGlob);
- hBrush = CreateSolidBrush(RGB(cast(ubyte)iRed, cast(ubyte)iGreen, cast(ubyte)iBlue));
- SelectObject(hdc, hBrush);
- Rectangle(hdc, min(xLeft, xRight), min(yTop, yBottom), max(xLeft, xRight), max(yTop, yBottom));
- ReleaseDC(hwndGlob, hdc);
- DeleteObject(hBrush);
- }
- Thread.sleep(dur!"msecs"(70));
- }
- }
- extern (Windows)
- LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) nothrow
- {
- scope (failure) assert(0);
- hwndGlob = hwnd;
- switch (message)
- {
- case WM_CREATE:
- spawn(&ThreadFunc);
- return 0;
- case WM_SIZE:
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- ExitProcess(0);
- return 0;
- default:
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }