/Samples/Chap14/HelloBit/HelloBit.d
D | 195 lines | 155 code | 36 blank | 4 comment | 7 complexity | dfa97527b34a890a8c9a7590e60d971d MD5 | raw file
- /+
- + Copyright (c) Charles Petzold, 1998.
- + Ported to the D Programming Language by Andrej Mitrovic, 2011.
- +/
- module HelloBlit;
- import core.memory;
- import core.runtime;
- import core.thread;
- import std.conv;
- import std.math;
- import std.range;
- import std.string;
- import std.utf : count, toUTFz;
- 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;
- import resource;
- string appName = "HelloBit";
- string description = "HelloBit";
- 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;
- }
- extern (Windows)
- LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) nothrow
- {
- scope (failure) assert(0);
- static HBITMAP hBitmap;
- static HDC hdcMem;
- static int cxBitmap, cyBitmap, cxClient, cyClient, iSize = IDM_BIG;
- string szText = " Hello, world! ";
- HDC hdc;
- HMENU hMenu;
- int x, y;
- PAINTSTRUCT ps;
- SIZE size;
- switch (message)
- {
- case WM_CREATE:
- hdc = GetDC(hwnd);
- hdcMem = CreateCompatibleDC(hdc);
- GetTextExtentPoint32(hdc, szText.toUTF16z, szText.count, &size);
- cxBitmap = size.cx;
- cyBitmap = size.cy;
- hBitmap = CreateCompatibleBitmap(hdc, cxBitmap, cyBitmap);
- ReleaseDC(hwnd, hdc);
- SelectObject(hdcMem, hBitmap);
- TextOut(hdcMem, 0, 0, szText.toUTF16z, szText.count);
- return 0;
- case WM_SIZE:
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- return 0;
- case WM_COMMAND:
- hMenu = GetMenu(hwnd);
- switch (LOWORD(wParam))
- {
- case IDM_BIG:
- case IDM_SMALL:
- CheckMenuItem(hMenu, iSize, MF_UNCHECKED);
- iSize = LOWORD(wParam);
- CheckMenuItem(hMenu, iSize, MF_CHECKED);
- InvalidateRect(hwnd, NULL, TRUE);
- break;
- default:
- }
- return 0;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
- switch (iSize)
- {
- case IDM_BIG:
- StretchBlt(hdc, 0, 0, cxClient, cyClient,
- hdcMem, 0, 0, cxBitmap, cyBitmap, SRCCOPY);
- break;
- case IDM_SMALL:
- for (y = 0; y < cyClient; y += cyBitmap)
- {
- for (x = 0; x < cxClient; x += cxBitmap)
- {
- BitBlt(hdc, x, y, cxBitmap, cyBitmap, hdcMem, 0, 0, SRCCOPY);
- }
- }
- break;
- default:
- }
- EndPaint(hwnd, &ps);
- return 0;
- case WM_DESTROY:
- DeleteDC(hdcMem);
- DeleteObject(hBitmap);
- PostQuitMessage(0);
- return 0;
- default:
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }