Last updated: 17. 1.1998, 18:56
<*/NOWARN:F*> (*---------------------------------------------------- SYSMETS2.C --- System Metrics Display Program No. 2 (c) Charles Petzold, 1996 SysMets2.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 ----------------------------------------------------*) MODULE SysMets2; IMPORT SYSTEM; IMPORT WINUSER; IMPORT WIN32; IMPORT WINGDI; IMPORT SysMets; IMPORT Strings; IMPORT WINX; CONST szAppName = "SysMets2"; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; cxChar, cxCaps, cyChar, cyClient, iVscrollPos : INTEGER; (*++++*****************************************************************) PROCEDURE MaxInt (a,b : INTEGER) : INTEGER; (**********************************************************************) BEGIN IF(a>b) THEN RETURN a; ELSE RETURN b; END; END MaxInt; (*++++*****************************************************************) PROCEDURE MinInt (a,b : INTEGER) : INTEGER; (**********************************************************************) BEGIN IF(a>b) THEN RETURN b; ELSE RETURN a; END; END MinInt; <*/PUSH*> %IF WIN32 %THEN <*/CALLS:WIN32SYSTEM*> %ELSE <*/CALLS:WINSYSTEM*> %END (*++++*****************************************************************) PROCEDURE WndProc (hwnd : WIN32.HWND; iMsg : WIN32.UINT; wParam : WIN32.WPARAM; lParam : WIN32.LPARAM) : WIN32.LRESULT [EXPORT]; (**********************************************************************) VAR szBuffer : ARRAY[0..10] OF CHAR; hdc : WIN32.HDC; i, y : INTEGER; ps : WINUSER.PAINTSTRUCT; tm : WINGDI.TEXTMETRIC; BEGIN CASE (iMsg) OF | WINUSER.WM_CREATE : hdc := WINUSER.GetDC (hwnd); WINGDI.GetTextMetrics (hdc, tm); cxChar := tm.tmAveCharWidth; IF(tm.tmPitchAndFamily=1) THEN cxCaps := 3*cxChar/2; ELSE cxCaps := 2*cxChar/2; END; cyChar := tm.tmHeight + tm.tmExternalLeading; WINUSER.ReleaseDC (hwnd, hdc); WINUSER.SetScrollRange (hwnd, WINUSER.SB_VERT, 0, SysMets.NUMLINES, FALSE); WINUSER.SetScrollPos (hwnd, WINUSER.SB_VERT, iVscrollPos, TRUE); RETURN 0; | WINUSER.WM_SIZE : cyClient := WINUSER.HIWORD (lParam); RETURN 0; | WINUSER.WM_VSCROLL : CASE (WINUSER.LOWORD (wParam)) OF | WINUSER.SB_LINEUP : iVscrollPos := iVscrollPos - 1; | WINUSER.SB_LINEDOWN : iVscrollPos := iVscrollPos + 1; | WINUSER.SB_PAGEUP : iVscrollPos :=iVscrollPos-cyClient DIV cyChar; | WINUSER.SB_PAGEDOWN : iVscrollPos :=iVscrollPos+ cyClient DIV cyChar; | WINUSER.SB_THUMBPOSITION : iVscrollPos := WINUSER.HIWORD (wParam); ELSE END; iVscrollPos := MaxInt (0, MinInt(iVscrollPos, SysMets.NUMLINES)); IF (iVscrollPos # WINUSER.GetScrollPos (hwnd, WINUSER.SB_VERT)) THEN WINUSER.SetScrollPos (hwnd, WINUSER.SB_VERT, iVscrollPos, TRUE); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); END; RETURN 0; | WINUSER.WM_PAINT : hdc := WINUSER.BeginPaint (hwnd, ps); FOR i := 0 TO SysMets.NUMLINES-1 DO y := cyChar * (1 - iVscrollPos + i); WINGDI.TextOut (hdc, cxChar, y, SysMets.sysmetrics[i].szLabel, LENGTH(SysMets.sysmetrics[i].szLabel)); WINGDI.TextOut (hdc, cxChar + 22 * cxCaps, y, SysMets.sysmetrics[i].szDesc, LENGTH(SysMets.sysmetrics[i].szDesc)); WINGDI.SetTextAlign (hdc, WINGDI.TA_RIGHT BOR WINGDI.TA_TOP); WINGDI.TextOut (hdc, cxChar + 22 * cxCaps + 40 * cxChar, y, szBuffer, WINUSER.wsprintf (szBuffer, "%5d", WINUSER.GetSystemMetrics (SysMets.sysmetrics[i].iIndex))); WINGDI.SetTextAlign (hdc, WINGDI.TA_LEFT BOR WINGDI.TA_TOP); END; WINUSER.EndPaint (hwnd, ps); RETURN 0; | WINUSER.WM_DESTROY : WINUSER.PostQuitMessage (0); RETURN 0; ELSE RETURN WINUSER.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; <*/POP*> (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) VAR rc : INTEGER; BEGIN wc.cbSize := SIZE(WINUSER.WNDCLASSEX); wc.style := WINUSER.CS_HREDRAW BOR WINUSER.CS_VREDRAW; wc.lpfnWndProc := WndProc; wc.cbClsExtra := 0; wc.cbWndExtra := 0; wc.hInstance := WINX.Instance; wc.hIcon := WINUSER.LoadIcon (NIL, WINUSER.IDI_APPLICATION^); wc.hCursor := WINUSER.LoadCursor (NIL, WINUSER.IDC_ARROW^); wc.hbrBackground := SYSTEM.CAST(WIN32.HBRUSH, WINGDI.GetStockObject (WINGDI.WHITE_BRUSH)); wc.lpszMenuName := NIL; wc.lpszClassName := SYSTEM.ADR(szAppName); wc.hIconSm := WINUSER.LoadIcon (NIL, WINUSER.IDI_APPLICATION^); rc := WINUSER.RegisterClassEx (wc); RETURN rc#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := WINUSER.CreateWindow (szAppName, (* window class name *) "Get System Metrics No. 2: Translation to Stony Brook Modula-2", (* window caption *) WINUSER.WS_OVERLAPPEDWINDOW BOR WINUSER.WS_VSCROLL, (* window style *) WINUSER.CW_USEDEFAULT, (* initial x position *) WINUSER.CW_USEDEFAULT, (* initial y position *) WINUSER.CW_USEDEFAULT, (* initial x size *) WINUSER.CW_USEDEFAULT, (* initial y size *) NIL, (* parent window handle *) NIL, (* window menu handle *) WINX.Instance, (* program instance handle *) NIL); (* creation parameters *) IF hwnd = NIL THEN RETURN FALSE; END; WINUSER.ShowWindow (hwnd, WINUSER.SW_SHOWDEFAULT); WINUSER.UpdateWindow (hwnd); RETURN TRUE; END InitMainWindow; (*++++*****************************************************************) BEGIN IF InitApplication() AND InitMainWindow() THEN WHILE (WINUSER.GetMessage(msg,NIL,0,0)) DO WINUSER.TranslateMessage(msg); WINUSER.DispatchMessage(msg); END; END; END SysMets2.