Last updated: 15. 1.1998, 21:42
<*/NOWARN:F*> MODULE ClipView; (*----------------------------------------- CLIPVIEW.C --- Simple Clipboard Viewer (c) Charles Petzold, 1996 ClipView.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 -----------------------------------------*) IMPORT WINUSER; IMPORT WIN32; IMPORT WINX; IMPORT WINGDI; IMPORT SYSTEM; CONST szAppName= "ClipView"; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; hwndNextViewer : WIN32.HWND; hGMem : WIN32.HGLOBAL; hdc : WIN32.HDC; pGMem : WIN32.PSTR; ps : WINUSER.PAINTSTRUCT; rect : WIN32.RECT; rc : WIN32.RECT; <*/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_CREATE : hwndNextViewer := WINUSER.SetClipboardViewer (hwnd); RETURN 0; | WINUSER.WM_CHANGECBCHAIN : IF (SYSTEM.CAST(WIN32.HWND,wParam) = hwndNextViewer) THEN hwndNextViewer := SYSTEM.CAST(WIN32.HWND,lParam); ELSIF (hwndNextViewer#NIL) THEN WINUSER.SendMessage (hwndNextViewer, iMsg, wParam, lParam); END; RETURN 0; | WINUSER.WM_DRAWCLIPBOARD : IF (hwndNextViewer#NIL) THEN WINUSER.SendMessage (hwndNextViewer, iMsg, wParam, lParam); END; WINUSER.InvalidateRect (hwnd, rc, TRUE); RETURN 0; | WINUSER.WM_PAINT : hdc := WINUSER.BeginPaint (hwnd, ps); WINUSER.GetClientRect (hwnd, rect); WINUSER.OpenClipboard (hwnd); hGMem := SYSTEM.CAST(WIN32.HGLOBAL,WINUSER.GetClipboardData (WINUSER.CF_TEXT)); IF (hGMem # NIL) THEN pGMem := SYSTEM.CAST(WIN32.PSTR,WIN32.GlobalLock (hGMem)); WINUSER.DrawText (hdc, pGMem^, -1, rect, WINUSER.DT_EXPANDTABS); WIN32.GlobalUnlock (hGMem); END; WINUSER.CloseClipboard (); WINUSER.EndPaint (hwnd, ps); RETURN 0; | WINUSER.WM_DESTROY : WINUSER.ChangeClipboardChain (hwnd, hwndNextViewer); WINUSER.PostQuitMessage (0); RETURN 0; ELSE RETURN WINUSER.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; <*/POP*> (*++++*****************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) 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 := NIL; 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, (* window class name *) "Simple Clipboard Viewer (Text only): 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 IF InitApplication() AND InitMainWindow() THEN WHILE (WINUSER.GetMessage(msg,NIL,0,0)) DO WINUSER.TranslateMessage(msg); WINUSER.DispatchMessage(msg); END; END; END ClipView.