Last updated: 15. 2.1998, 17:32
<*/NOWARN:F*> MODULE Beeper2; (*----------------------------------------- BEEPER2.C --- Timer Demo Program No. 2 (c) Charles Petzold, 1996 Beeper2.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 -----------------------------------------*) IMPORT WINUSER; IMPORT WINGDI; IMPORT WIN32; IMPORT WINX; IMPORT SYSTEM; CONST ID_TIMER = 1; CONST szAppName = "Beeper2"; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; fFlipFlop : BOOLEAN = FALSE; <*/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]; BEGIN CASE (iMsg) OF | WINUSER.WM_DESTROY : WINUSER.KillTimer (hwnd, ID_TIMER); WINUSER.PostQuitMessage (0); RETURN 0; ELSE RETURN WINUSER.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; <*/POP*> <*/PUSH*> %IF WIN32 %THEN <*/CALLS:WIN32SYSTEM*> %ELSE <*/CALLS:WINSYSTEM*> %END (*++++*****************************************************************) PROCEDURE TimerProc (hwnd : WIN32.HWND; (**********************************************************************) iMsg : WIN32.UINT; iTimerID : WIN32.UINT; dwTime : WIN32.DWORD); VAR hBrush : WIN32.HBRUSH; hdc : WIN32.HDC; rc : WIN32.RECT; BEGIN WINUSER.MessageBeep (0); fFlipFlop := NOT fFlipFlop; WINUSER.GetClientRect (hwnd, rc); hdc := WINUSER.GetDC (hwnd); IF(fFlipFlop=TRUE) THEN hBrush := WINGDI.CreateSolidBrush (WINGDI.RGB(255,0,0)); ELSE hBrush := WINGDI.CreateSolidBrush (WINGDI.RGB(0,0,255)); END; WINUSER.FillRect (hdc, rc, hBrush); WINUSER.ReleaseDC (hwnd, hdc); WINGDI.DeleteObject (SYSTEM.CAST(WIN32.HGDIOBJ,hBrush)); END TimerProc; <*/POP*> (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) BEGIN wc.cbSize := SIZE(wc); 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^); RETURN WINUSER.RegisterClassEx(wc)#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := WINUSER.CreateWindow (szAppName, "Beeper2 Timer Demo: Translation to Stony Brook Modula-2", WINUSER.WS_OVERLAPPEDWINDOW, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, NIL, NIL, WINX.Instance, NIL); WHILE(WINUSER.SetTimer (hwnd, ID_TIMER, 1000, SYSTEM.ADR(TimerProc))=0) DO IF(WINUSER.IDCANCEL = WINUSER.MessageBox (hwnd, "Too many clocks or timers!", szAppName, WINUSER.MB_ICONEXCLAMATION BOR WINUSER.MB_RETRYCANCEL)) THEN RETURN FALSE; END; 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 Beeper2.