/Samples/Chap05/WhatSize/WhatSize.d
D | 169 lines | 132 code | 33 blank | 4 comment | 3 complexity | 2ff922f781e01c2b86785dfd9dbb204c MD5 | raw file
- /+
- + Copyright (c) Charles Petzold, 1998.
- + Ported to the D Programming Language by Andrej Mitrovic, 2011.
- +/
- module WhatSize;
- import core.runtime;
- import core.thread;
- import std.string;
- import std.utf : count, toUTFz;
- auto toUTF16z(S)(S s)
- {
- return toUTFz!(const(wchar)*)(s);
- }
- import std.math;
- pragma(lib, "gdi32.lib");
- import core.sys.windows.windef;
- import core.sys.windows.winuser;
- import core.sys.windows.wingdi;
- 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 = "WhatSize";
- 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
- "What Size is the Window?", // 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;
- }
- void Show(HWND hwnd, HDC hdc, int xText, int yText, int iMapMode, string mapMode)
- {
- RECT rect;
- SaveDC(hdc);
- SetMapMode(hdc, iMapMode);
- GetClientRect(hwnd, &rect);
- DPtoLP(hdc, cast(PPOINT)&rect, 2);
- RestoreDC(hdc, -1);
- auto value = format("%-20s %7s %7s %7s %7s", mapMode, rect.left, rect.right, rect.top, rect.bottom);
- TextOut(hdc, xText, yText, value.toUTF16z, value.count);
- }
- extern (Windows)
- LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) nothrow
- {
- scope (failure) assert(0);
- enum heading = "Mapping Mode Left Right Top Bottom";
- enum underline = "------------ ---- ----- --- ------";
- static int cxChar, cyChar;
- HDC hdc;
- PAINTSTRUCT ps;
- TEXTMETRIC tm;
- switch (message)
- {
- case WM_CREATE:
- {
- hdc = GetDC(hwnd);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- GetTextMetrics(hdc, &tm);
- cxChar = tm.tmAveCharWidth;
- cyChar = tm.tmHeight + tm.tmExternalLeading;
- ReleaseDC(hwnd, hdc);
- return 0;
- }
- case WM_PAINT:
- {
- hdc = BeginPaint(hwnd, &ps);
- SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
- SetMapMode(hdc, MM_ANISOTROPIC);
- SetWindowExtEx(hdc, 1, 1, NULL);
- SetViewportExtEx(hdc, cxChar, cyChar, NULL);
- TextOut(hdc, 1, 1, heading.toUTF16z, heading.count);
- TextOut(hdc, 1, 2, underline.toUTF16z, underline.count);
- Show(hwnd, hdc, 1, 3, MM_TEXT, "pixels)");
- Show(hwnd, hdc, 1, 4, MM_LOMETRIC, "LOMETRIC(.1 mm)");
- Show(hwnd, hdc, 1, 5, MM_HIMETRIC, "HIMETRIC(.01 mm)");
- Show(hwnd, hdc, 1, 6, MM_LOENGLISH, "LOENGLISH(.01 in)");
- Show(hwnd, hdc, 1, 7, MM_HIENGLISH, "HIENGLISH(.001 in)");
- Show(hwnd, hdc, 1, 8, MM_TWIPS, "TWIPS(1/1440 in)");
- EndPaint(hwnd, &ps);
- return 0;
- }
- case WM_DESTROY:
- {
- PostQuitMessage(0);
- return 0;
- }
- default:
- }
- return DefWindowProc(hwnd, message, wParam, lParam);
- }