Last updated: 18. 1.1998, 15:48
<*/NOWARN:F*> MODULE PopMenu; (*---------------------------------------- POPMENU.C --- Popup Menu Demonstration (c) Charles Petzold, 1996 PopMenu.mod --- Translation to Stony Brook Modula-2 (c) Peter Stadler, 1997 ----------------------------------------*) %IF WIN32 %THEN <*/Resource:POPMENU.RES*> %ELSE %END IMPORT h2d_PopMenu; IMPORT WINUSER; IMPORT WIN32; IMPORT WINX; IMPORT WINGDI; IMPORT SYSTEM; CONST szAppName = "PopMenu"; VAR hwnd : WIN32.HWND; msg : WINUSER.MSG; wc : WINUSER.WNDCLASSEX; hInst : WIN32.HINSTANCE; TYPE Color = INTEGER; ColorArr = ARRAY[0..4] OF Color; CONST iColorID = ColorArr { WINGDI.WHITE_BRUSH, WINGDI.LTGRAY_BRUSH, WINGDI.GRAY_BRUSH, WINGDI.DKGRAY_BRUSH, WINGDI.BLACK_BRUSH }; VAR iSelection : INTEGER = h2d_PopMenu.IDM_WHITE; hMenu : WIN32.HMENU; <*/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 point : WIN32.POINT; BEGIN CASE (iMsg) OF | WINUSER.WM_CREATE : hMenu := WINUSER.LoadMenu (hInst, szAppName); hMenu := WINUSER.GetSubMenu (hMenu, 0); RETURN 0; | WINUSER.WM_RBUTTONDOWN : point.x := WINUSER.LOWORD (lParam); point.y := WINUSER.HIWORD (lParam); WINUSER.ClientToScreen (hwnd, point); WINUSER.TrackPopupMenu (hMenu, 0, point.x, point.y, 0, hwnd, WINX.NIL_RECT); RETURN 0; | WINUSER.WM_COMMAND : CASE (WINUSER.LOWORD (wParam)) OF | h2d_PopMenu.IDM_NEW : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_OPEN : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_SAVE : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_SAVEAS : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_UNDO : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_CUT : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_COPY : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_PASTE : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_DEL : WINUSER.MessageBeep (0); RETURN 0; | h2d_PopMenu.IDM_WHITE : (* Note: Logic below *) WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_UNCHECKED); iSelection := WINUSER.LOWORD (wParam); WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_CHECKED); WINUSER.SetClassLong (hwnd, WINUSER.GCL_HBRBACKGROUND, SYSTEM.CAST(WIN32.LONG, WINGDI.GetStockObject (iColorID[WINUSER.LOWORD (wParam) - h2d_PopMenu.IDM_WHITE]))); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | h2d_PopMenu.IDM_LTGRAY : (* assumes that h2d_PopMenu.IDM_WHITE *) WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_UNCHECKED); iSelection := WINUSER.LOWORD (wParam); WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_CHECKED); WINUSER.SetClassLong (hwnd, WINUSER.GCL_HBRBACKGROUND, SYSTEM.CAST(WIN32.LONG, WINGDI.GetStockObject (iColorID[WINUSER.LOWORD (wParam) - h2d_PopMenu.IDM_WHITE]))); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | h2d_PopMenu.IDM_GRAY : (* through h2d_PopMenu.IDM_BLACK are *) WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_UNCHECKED); iSelection := WINUSER.LOWORD (wParam); WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_CHECKED); WINUSER.SetClassLong (hwnd, WINUSER.GCL_HBRBACKGROUND, SYSTEM.CAST(WIN32.LONG, WINGDI.GetStockObject (iColorID[WINUSER.LOWORD (wParam) - h2d_PopMenu.IDM_WHITE]))); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | h2d_PopMenu.IDM_DKGRAY : (* consecutive numbers in *) WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_UNCHECKED); iSelection := WINUSER.LOWORD (wParam); WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_CHECKED); WINUSER.SetClassLong (hwnd, WINUSER.GCL_HBRBACKGROUND, SYSTEM.CAST(WIN32.LONG, WINGDI.GetStockObject (iColorID[WINUSER.LOWORD (wParam) - h2d_PopMenu.IDM_WHITE]))); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | h2d_PopMenu.IDM_BLACK : (* the order shown here. *) WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_UNCHECKED); iSelection := WINUSER.LOWORD (wParam); WINUSER.CheckMenuItem (hMenu, iSelection, WINUSER.MF_CHECKED); WINUSER.SetClassLong (hwnd, WINUSER.GCL_HBRBACKGROUND, SYSTEM.CAST(WIN32.LONG, WINGDI.GetStockObject (iColorID[WINUSER.LOWORD (wParam) - h2d_PopMenu.IDM_WHITE]))); WINUSER.InvalidateRect (hwnd, WINX.NIL_RECT, TRUE); RETURN 0; | h2d_PopMenu.IDM_ABOUT : WINUSER.MessageBox (hwnd, "Popup Menu Demonstration Program.", szAppName, WINUSER.MB_ICONINFORMATION BOR WINUSER.MB_OK); RETURN 0; | h2d_PopMenu.IDM_EXIT : WINUSER.SendMessage (hwnd, WINUSER.WM_CLOSE, 0, 0); RETURN 0; | h2d_PopMenu.IDM_HELP : WINUSER.MessageBox (hwnd, "Help not yet implemented!", szAppName, WINUSER.MB_ICONEXCLAMATION BOR WINUSER.MB_OK); RETURN 0; ELSE RETURN 0; END; | 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 hInst := WINX.Instance; hwnd := WINUSER.CreateWindow (szAppName, (* window class name *) "Popup Menu Demonstration: 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 *) WINX.Instance, (* 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 PopMenu.