Last updated: 17. 2.1998, 20:33
<* +M2EXTENSIONS *> (*---------------------------------------------------- SYSMETS1.C --- System Metrics Display Program No. 1 (c) Charles Petzold, 1996 SysMets1.mod --- Translation to XDS Modula-2 (c) Peter Stadler, 1997 ----------------------------------------------------*) MODULE SysMets1; IMPORT SYSTEM; IMPORT Windows; IMPORT SysMets; IMPORT Strings; CONST szAppName = "SysMets1" ; VAR hwnd : Windows.HWND; msg : Windows.MSG; wc : Windows.WNDCLASSEX; cxChar, cxCaps, cyChar: INTEGER; (*++++*****************************************************************) PROCEDURE [Windows.CALLBACK] WndProc (hwnd : Windows.HWND; iMsg : Windows.UINT; wParam : Windows.WPARAM; lParam : Windows.LPARAM) : Windows.LRESULT; (**********************************************************************) VAR szBuffer : ARRAY[0..10] OF CHAR; hdc : Windows.HDC; i : INTEGER; ps : Windows.PAINTSTRUCT; tm : Windows.TEXTMETRIC; BEGIN CASE (iMsg) OF | Windows.WM_CREATE : hdc := Windows.GetDC (hwnd); Windows.GetTextMetrics (hdc, tm); cxChar := tm.tmAveCharWidth; IF(tm.tmPitchAndFamily=SYSTEM.CAST(Windows.PITCH_AND_FAMILY_SET,1)) THEN cxCaps := 3*cxChar/2; ELSE cxCaps := 2*cxChar/2; END; cyChar := tm.tmHeight + tm.tmExternalLeading; Windows.ReleaseDC (hwnd, hdc); RETURN 0; | Windows.WM_PAINT : hdc := Windows.BeginPaint (hwnd, ps); FOR i := 0 TO SysMets.NUMLINES-1 DO Windows.TextOut (hdc, cxChar, cyChar * (1 + i), SysMets.sysmetrics[i].szLabel, LENGTH(SysMets.sysmetrics[i].szLabel)); Windows.TextOut (hdc, cxChar + 22 * cxCaps, cyChar * (1 + i), SysMets.sysmetrics[i].szDesc, LENGTH(SysMets.sysmetrics[i].szDesc)); Windows.SetTextAlign (hdc, Windows.TA_RIGHT + Windows.TA_TOP); Windows.TextOut (hdc, cxChar + 22 * cxCaps + 40 * cxChar, cyChar * (1 + i), szBuffer, Windows.wsprintf (szBuffer, "%5d", Windows.GetSystemMetrics (SysMets.sysmetrics[i].iIndex))); Windows.SetTextAlign (hdc, Windows.TA_LEFT + Windows.TA_TOP); END; Windows.EndPaint (hwnd, ps); RETURN 0; | Windows.WM_DESTROY : Windows.PostQuitMessage (0); RETURN 0; ELSE RETURN Windows.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) VAR rc : INTEGER; BEGIN wc.cbSize := SIZE(Windows.WNDCLASSEX); wc.style := Windows.CS_HREDRAW + Windows.CS_VREDRAW; wc.lpfnWndProc := WndProc; wc.cbClsExtra := 0; wc.cbWndExtra := 0; wc.hInstance := Windows.MyInstance(); wc.hIcon := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION); wc.hCursor := Windows.LoadCursor (NIL, Windows.IDC_ARROW); wc.hbrBackground := SYSTEM.CAST(Windows.HBRUSH, Windows.GetStockObject (Windows.WHITE_BRUSH)); wc.lpszMenuName := NIL; wc.lpszClassName := SYSTEM.ADR(szAppName); wc.hIconSm := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION); rc := Windows.RegisterClassEx (wc); RETURN rc#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := Windows.CreateWindow (szAppName, (* window class name *) "Get System Metrics No. 1: Translation to XDS Modula-2", (* window caption *) Windows.WS_OVERLAPPEDWINDOW + Windows.WS_VSCROLL, (* window style *) Windows.CW_USEDEFAULT, (* initial x position *) Windows.CW_USEDEFAULT, (* initial y position *) Windows.CW_USEDEFAULT, (* initial x size *) Windows.CW_USEDEFAULT, (* initial y size *) NIL, (* parent window handle *) NIL, (* window menu handle *) Windows.MyInstance(), (* program instance handle *) NIL); (* creation parameters *) IF hwnd = NIL THEN RETURN FALSE; END; Windows.ShowWindow (hwnd, Windows.SW_SHOWDEFAULT); Windows.UpdateWindow (hwnd); RETURN TRUE; END InitMainWindow; (*++++*****************************************************************) BEGIN IF InitApplication() AND InitMainWindow() THEN WHILE (Windows.GetMessage(msg,NIL,0,0)) DO Windows.TranslateMessage(msg); Windows.DispatchMessage(msg); END; END; END SysMets1.