Last updated: 20. 2.1998, 23: 3
<* +M2EXTENSIONS *> MODULE AnaClock; (*----------------------------------------- ANACLOCK.C --- Analog Clock Program (c) Charles Petzold, 1996 AnaClock.mod --- Translation to XDS Modula-2 (c) Peter Stadler, 1998 -----------------------------------------*) IMPORT Windows; IMPORT SYSTEM; IMPORT SysClock; IMPORT Str; IMPORT RealMath; IMPORT Lib; CONST ID_TIMER = 1; CONST TWOPI = 2.0 * 3.14159; CONST szAppName = "DigClock"; VAR cxClient : INTEGER; cyClient : INTEGER; (*static in WndProc *) dtPrevious : SysClock.DateTime; datetime : SysClock.DateTime; VAR hwnd : Windows.HWND; msg : Windows.MSG; wc : Windows.WNDCLASSEX; iDHAngle : ARRAY[0..2] OF INTEGER; TYPE PTARRAY = ARRAY[0..2],[0..4] OF Windows.POINT; CONST(* static in DrawHands *) pt = PTARRAY { { {0, -150},{100, 0},{0, 600},{-100, 0},{0, -150} }, { {0, -200},{50, 0},{0, 800},{-50, 0},{0, -200} }, { {0, 0},{0, 0},{0, 0},{0, 0},{0, 800} } }; (*++++*****************************************************************) PROCEDURE SetIsotropic (hdc : Windows.HDC; (**********************************************************************) cxClient : INTEGER; cyClient : INTEGER); BEGIN Windows.SetMapMode (hdc, Windows.MM_ISOTROPIC); Windows.SetWindowExtEx (hdc, 1000, 1000, NIL); Windows.SetViewportExtEx (hdc, cxClient DIV 2, -cyClient DIV 2, NIL); Windows.SetViewportOrgEx (hdc, cxClient DIV 2, cyClient DIV 2, NIL); END SetIsotropic; (*++++*****************************************************************) PROCEDURE RotatePoint (VAR pt : ARRAY OF Windows.POINT; (**********************************************************************) iNum : INTEGER; iAngle : INTEGER); VAR i : INTEGER; ptTemp : Windows.POINT; BEGIN FOR i := 0 TO iNum-1 DO ptTemp.x := VAL(INTEGER,(FLOAT(pt[i].x) * RealMath.cos (TWOPI * FLOAT(iAngle)/ 360.)) + FLOAT(pt[i].y) * RealMath.sin (TWOPI * FLOAT(iAngle)/ 360.)); ptTemp.y := VAL(INTEGER,(FLOAT(pt[i].y) * RealMath.cos (TWOPI * FLOAT(iAngle)/ 360.)) - FLOAT(pt[i].x) * RealMath.sin (TWOPI * FLOAT(iAngle)/ 360.)); pt[i] := ptTemp; END; END RotatePoint; (*++++*****************************************************************) PROCEDURE DrawClock (hdc : Windows.HDC); (**********************************************************************) VAR iAngle : INTEGER; pt : ARRAY[0..2] OF Windows.POINT; BEGIN FOR iAngle := 0 TO 360-1 BY 6 DO pt[0].x := 0; pt[0].y := 900; RotatePoint (pt, 1, iAngle); IF(iAngle REM 5 #0) THEN pt[2].x := 33; pt[2].y := 33; ELSE pt[2].x := 100; pt[2].y := 100; END; pt[0].x := pt[0].x - pt[2].x DIV 2; pt[0].y := pt[0].y - pt[2].y DIV 2; pt[1].x := pt[0].x + pt[2].x; pt[1].y := pt[0].y + pt[2].y; Windows.SelectObject (hdc, Windows.GetStockObject (Windows.BLACK_BRUSH)); Windows.Ellipse (hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y); END; END DrawClock; (*++++*****************************************************************) PROCEDURE DrawHands (hdc : Windows.HDC; (**********************************************************************) datetime : SysClock.DateTime; bChange : BOOLEAN); VAR i : INTEGER; ptTemp: ARRAY[0..2],[0..4] OF Windows.POINT; BEGIN iDHAngle[0] := (datetime.hour * 30) REM 360 + datetime.minute DIV 2; iDHAngle[1] := datetime.minute * 6; iDHAngle[2] := datetime.second * 6; SYSTEM.MOVE(SYSTEM.ADR(pt),SYSTEM.ADR(ptTemp), SIZE(pt)); IF(bChange=TRUE) THEN FOR i := 0 TO 3-1 DO RotatePoint (ptTemp[i], 5, iDHAngle[i]); Windows.Polyline (hdc, ptTemp[i], 5); END; ELSE FOR i := 2 TO 3-1 DO RotatePoint (ptTemp[i], 5, iDHAngle[i]); Windows.Polyline (hdc, ptTemp[i], 5); END; END; END DrawHands; (*++++*****************************************************************) PROCEDURE [Windows.CALLBACK] WndProc (hwnd : Windows.HWND; (**********************************************************************) iMsg : Windows.UINT; wParam : Windows.WPARAM; lParam : Windows.LPARAM) : Windows.LRESULT; VAR hdc : Windows.HDC; ps : Windows.PAINTSTRUCT; bChange: BOOLEAN; BEGIN CASE (iMsg) OF | Windows.WM_CREATE : SysClock.GetClock(datetime); dtPrevious := datetime; RETURN 0; | Windows.WM_SIZE : cxClient := Windows.LOWORD (lParam); cyClient := Windows.HIWORD (lParam); RETURN 0; | Windows.WM_TIMER : SysClock.GetClock(datetime); bChange := (datetime.hour # dtPrevious.hour) OR (datetime.minute # dtPrevious.minute); hdc := Windows.GetDC (hwnd); SetIsotropic (hdc, cxClient, cyClient); Windows.SelectObject (hdc, Windows.GetStockObject (Windows.WHITE_PEN)); DrawHands (hdc, dtPrevious, bChange); Windows.SelectObject (hdc, Windows.GetStockObject (Windows.BLACK_PEN)); DrawHands (hdc, datetime, TRUE); Windows.ReleaseDC (hwnd, hdc); dtPrevious := datetime; RETURN 0; | Windows.WM_PAINT : hdc := Windows.BeginPaint (hwnd, ps); SetIsotropic (hdc, cxClient, cyClient); DrawClock (hdc); DrawHands (hdc, dtPrevious, TRUE); Windows.EndPaint (hwnd, ps); RETURN 0; | Windows.WM_DESTROY : Windows.KillTimer (hwnd, ID_TIMER); Windows.PostQuitMessage (0); RETURN 0; ELSE RETURN Windows.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) VAR rc : CARDINAL; BEGIN wc.cbSize := SIZE(wc); wc.style := Windows.CS_HREDRAW + Windows.CS_VREDRAW; wc.lpfnWndProc := WndProc; wc.cbClsExtra := 0; wc.cbWndExtra := 0; wc.hInstance := Windows.MyInstance(); wc.hIcon := NIL; 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 := NIL; rc := Windows.RegisterClassEx(wc); RETURN rc#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := Windows.CreateWindow (szAppName, "Analog Clock: Translation to XDS Modula-2", Windows.WS_OVERLAPPEDWINDOW, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, NIL, NIL, Windows.MyInstance(), NIL); WHILE(Windows.SetTimer (hwnd, ID_TIMER, 1000, NIL)=0) DO Windows.MessageBox (hwnd, "Too many clocks or timers!", szAppName, Windows.MB_ICONEXCLAMATION + Windows.MB_OK); RETURN FALSE; END; Windows.ShowWindow (hwnd, Windows.SW_SHOWNOACTIVATE); (*????*) 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 AnaClock.