Last updated: 4. 3.1998, 23:44
<*/NOWARN:F*> MODULE RndRctMT; (*------------------------------------------ RNDRCTMT.C --- Displays Random Rectangles (c) Charles Petzold, 1996 RndRctMT.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 ------------------------------------------*) IMPORT WINUSER; IMPORT WIN32; IMPORT WINX; IMPORT WINGDI; IMPORT SYSTEM; IMPORT Lib; IMPORT Threads; VAR hwnd : WIN32.HWND; cxClient : INTEGER; cyClient : INTEGER; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; CONST szAppName = "RndRctMT"; (*++++*****************************************************************) 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; PROCEDURE Thread (dummy : SYSTEM.ADDRESS) : WIN32.DWORD; VAR hBrush : WIN32.HBRUSH; hdc : WIN32.HDC; xLeft : INTEGER; xRight : INTEGER; yTop : INTEGER; yBottom : INTEGER; iRed : INTEGER; iGreen : INTEGER; iBlue : INTEGER; BEGIN (* UNREFERENCED_PARAMETER(dummy); *) LOOP IF (cxClient # 0) OR (cyClient # 0) THEN xLeft := VAL(INTEGER,Lib.RANDOM(1000) REM VAL(CARDINAL,cxClient)); xRight := VAL(INTEGER,Lib.RANDOM(1000) REM VAL(CARDINAL,cxClient)); yTop := VAL(INTEGER,Lib.RANDOM(1000) REM VAL(CARDINAL,cyClient)); yBottom := VAL(INTEGER,Lib.RANDOM(1000) REM VAL(CARDINAL,cyClient)); iRed := VAL(INTEGER,Lib.RANDOM(1000) + 255); iGreen := VAL(INTEGER,Lib.RANDOM(1000) + 255); iBlue := VAL(INTEGER,Lib.RANDOM(1000) + 255); hdc := WINUSER.GetDC (hwnd); hBrush := WINGDI.CreateSolidBrush (WINGDI.RGB (iRed, iGreen, iBlue)); WINGDI.SelectObject (hdc, SYSTEM.CAST(WIN32.HGDIOBJ,hBrush)); WINGDI.Rectangle (hdc, MinInt(xLeft, xRight), MinInt (yTop, yBottom), MaxInt (xLeft, xRight), MaxInt (yTop, yBottom)); WINUSER.ReleaseDC (hwnd, hdc); WINGDI.DeleteObject (SYSTEM.CAST(WIN32.HGDIOBJ,hBrush)); END; END; RETURN 0; END Thread; <*/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 MessageThread : Threads.Thread; BEGIN CASE (iMsg) OF | WINUSER.WM_CREATE : (* threadHandle := WIN32.CreateThread(WINX.NIL_SECURITY_ATTRIBUTES,100000,SYSTEM.CAST(WIN32.LPTHREAD_START_ROUTINE,Thread), NIL,WIN32.CREATE_SUSPENDED,tid); *) Threads.CreateThread(MessageThread, Thread, NIL, 8192, TRUE); RETURN 0; | WINUSER.WM_SIZE : cxClient := WINUSER.LOWORD (lParam); cyClient := WINUSER.HIWORD (lParam); 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 : CARDINAL; BEGIN wc.cbSize := SIZE(wc); wc.style := WINUSER.CS_HREDRAW + 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 *) "Random Rectangles: Translation to Stony Brook Modula-2", (* window caption *) WINUSER.WS_OVERLAPPEDWINDOW, (* 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 *) wc.hInstance, (* 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 Lib.RANDOMIZE((*1000*)); IF InitApplication() AND InitMainWindow() THEN WHILE (WINUSER.GetMessage(msg,NIL,0,0)) DO WINUSER.TranslateMessage(msg); WINUSER.DispatchMessage(msg); END; END; END RndRctMT.