Last updated: 15. 2.1998, 11:41
<*/NOWARN:F*> (*-------------------------------------------------------------- CONNECT.C --- Connect-the-Dots Mouse Demo Program (c) Charles Petzold, 1996 Connect.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 ------------------------------------------------------------*) MODULE Connect; IMPORT WINUSER; IMPORT WINX; IMPORT WINGDI; IMPORT WIN32; IMPORT SYSTEM; CONST MAXPOINTS = 1000; CONST szAppName = "Connect_the_Dots"; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; iCount : INTEGER; points : ARRAY[0..MAXPOINTS] OF WIN32.POINT; hdc : WIN32.HDC; ps : WINUSER.PAINTSTRUCT; <*/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 i,j : INTEGER; BEGIN CASE (iMsg) OF | WINUSER.WM_LBUTTONDOWN : iCount := 0; WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | WINUSER.WM_MOUSEMOVE : IF (wParam BAND WINUSER.MK_LBUTTON=1) AND (iCount < 1000) THEN points[iCount].x := WINUSER.LOWORD (lParam); points[iCount].y := WINUSER.HIWORD (lParam); INC(iCount); hdc := WINUSER.GetDC (hwnd); WINGDI.SetPixel (hdc, WINUSER.LOWORD (lParam), WINUSER.HIWORD (lParam), 0000h); WINUSER.ReleaseDC (hwnd, hdc); END; RETURN 0; | WINUSER.WM_LBUTTONUP : WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, FALSE); RETURN 0; | WINUSER.WM_PAINT : hdc := WINUSER.BeginPaint (hwnd, ps); WINUSER.SetCursor (WINUSER.LoadCursor (NIL, WINUSER.IDC_WAIT^)); WINUSER.ShowCursor (TRUE); FOR i := 0 TO iCount - 2 DO FOR j := i + 1 TO iCount-1 DO WINGDI.MoveToEx (hdc, points[i].x, points[i].y,WINX.NIL_POINT); WINGDI.LineTo (hdc, points[j].x, points[j].y); END; END; WINUSER.ShowCursor (FALSE); WINUSER.SetCursor (WINUSER.LoadCursor (NIL, WINUSER.IDC_ARROW^)); 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; (***************************************************************************) 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^); RETURN WINUSER.RegisterClassEx(wc)#0; END InitApplication; (*+++***********************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (***************************************************************************) BEGIN hwnd := WINUSER.CreateWindow (szAppName, "Connect-the-Points Mouse Demo: Translation to Stony Brook Modula-2", WINUSER.WS_OVERLAPPEDWINDOW, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, WINUSER.CW_USEDEFAULT, NIL, NIL, wc.hInstance, NIL); 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 Connect.