Last updated: 18. 1.1998, 10:42
<* +M2EXTENSIONS *>
(*-------------------------------------------------------
KEYLOOK.C --- Displays Keyboard and Character Messages
(c) Charles Petzold, 1996
KeyLook.MOD --- Translation to XDS Modula-2
(c) Peter Stadler, 1997
-------------------------------------------------------*)
MODULE KeyLook;
IMPORT SYSTEM;
IMPORT Windows;
CONST
szAppName = "KeyLook";
VAR
hwnd : Windows.HWND;
msg : Windows.MSG;
wc : Windows.WNDCLASSEX;
rect : Windows.RECT;
cxChar : INTEGER;
cyChar : INTEGER;
TYPE
Form = ARRAY[0..38] OF CHAR;
FormArr = ARRAY[0..1] OF Form;
CONST
szFormat = FormArr{
{ "%-14s %3d %c %6u %4d %3s %3s %4s %4s"},
{ "%-14s %3d %c %6u %4d %3s %3s %4s %4s"}
};
CONST szTop =
"Message Key Char Repeat Scan Ext ALT Prev Tran";
szUnd =
"_______ ___ ____ ______ ____ ___ ___ ____ ____";
PROCEDURE ShowKey (hwnd : Windows.HWND; iType : INTEGER; szMessage : ARRAY OF CHAR;
wParam : Windows.WPARAM; lParam : Windows.LPARAM);
VAR
szBuffer : ARRAY[0..79] OF CHAR;
hdc : Windows.HDC;
TYPE
Bytes = ARRAY[0..4] OF CHAR;
VAR
byte : Windows.BYTE;
str1 : Bytes;
str2 : Bytes;
str3 : Bytes;
str4 : Bytes;
BEGIN
Windows.ScrollWindow (hwnd, 0, -cyChar, rect, rect);
hdc := Windows.GetDC (hwnd);
Windows.SelectObject (hdc, Windows.GetStockObject (Windows.SYSTEM_FIXED_FONT));
IF(iType=1) THEN
byte := wParam;
ELSE
byte := SYSTEM.CAST(Windows.BYTE,' ');
END;
IF(01000000h - lParam=1) THEN
str1 := "Yes ";
ELSE
str1 := "No ";
END;
IF(20000000h - lParam=1) THEN
str2 := "Yes ";
ELSE
str2 := "No ";
END;
IF(40000000h - lParam=1) THEN
str3 := "Down";
ELSE
str3 := "Up ";
END;
IF(60000000h - lParam=1) THEN
(* 80000000h !!!! *)
str4 := "Up ";
ELSE
str4 := "Down";
END;
Windows.TextOut (hdc, cxChar, rect.bottom - cyChar, szBuffer,
Windows.wsprintf (szBuffer, szFormat [iType],
szMessage, wParam,
byte,
Windows.LOWORD (lParam),
Windows.HIWORD (lParam) - 000000FFh,
str1,
str2,
str3,
str4));
Windows.ReleaseDC (hwnd, hdc);
Windows.ValidateRect (hwnd, NIL);
END ShowKey;
(*++++*****************************************************************)
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;
tm : Windows.TEXTMETRIC;
BEGIN
CASE (iMsg) OF
| Windows.WM_CREATE :
hdc := Windows.GetDC (hwnd);
Windows.SelectObject (hdc, Windows.GetStockObject (Windows.SYSTEM_FIXED_FONT));
Windows.GetTextMetrics (hdc, tm);
cxChar := tm.tmAveCharWidth;
cyChar := tm.tmHeight;
Windows.ReleaseDC (hwnd, hdc);
rect.top := 3 * cyChar DIV 2;
RETURN 0;
| Windows.WM_SIZE :
rect.right := Windows.LOWORD (lParam);
rect.bottom := Windows.HIWORD (lParam);
Windows.UpdateWindow (hwnd);
RETURN 0;
| Windows.WM_PAINT :
Windows.InvalidateRect (hwnd, NIL, TRUE);
hdc := Windows.BeginPaint (hwnd, ps);
Windows.SelectObject (hdc, Windows.GetStockObject (Windows.SYSTEM_FIXED_FONT));
Windows.SetBkMode (hdc, Windows.TRANSPARENT);
Windows.TextOut (hdc, cxChar, cyChar DIV 2, szTop, (SIZE(szTop) - 1));
Windows.TextOut (hdc, cxChar, cyChar DIV 2, szUnd, (SIZE(szUnd) - 1));
Windows.EndPaint (hwnd, ps);
RETURN 0;
| Windows.WM_KEYDOWN :
ShowKey (hwnd, 0, "Windows.WM_KEYDOWN", wParam, lParam);
RETURN 0;
| Windows.WM_KEYUP :
ShowKey (hwnd, 0, "Windows.WM_KEYUP", wParam, lParam);
RETURN 0;
| Windows.WM_CHAR :
ShowKey (hwnd, 1, "Windows.WM_CHAR", wParam, lParam);
RETURN 0;
| Windows.WM_DEADCHAR :
ShowKey (hwnd, 1, "Windows.WM_DEADCHAR", wParam, lParam);
RETURN 0;
| Windows.WM_SYSKEYDOWN :
ShowKey (hwnd, 0, "Windows.WM_SYSKEYDOWN", wParam, lParam);
| Windows.WM_SYSKEYUP :
ShowKey (hwnd, 0, "Windows.WM_SYSKEYUP", wParam, lParam);
| Windows.WM_SYSCHAR :
ShowKey (hwnd, 1, "Windows.WM_SYSCHAR", wParam, lParam);
| Windows.WM_SYSDEADCHAR :
ShowKey (hwnd, 1, "Windows.WM_SYSDEADCHAR", wParam, lParam);
| Windows.WM_DESTROY :
Windows.PostQuitMessage (0);
RETURN 0;
ELSE
RETURN Windows.DefWindowProc (hwnd, iMsg, wParam, lParam);
END;
END WndProc;
(*++++*****************************************************************)
PROCEDURE InitApplication () : BOOLEAN;
(**********************************************************************)
BEGIN
wc.cbSize := SIZE(Windows.WNDCLASSEX);
wc.style := Windows.CS_HREDRAW + Windows.CS_VREDRAW;
wc.lpfnWndProc := WndProc;
wc.cbClsExtra := 0;
wc.cbWndExtra := 0;
wc.hInstance := Windows.MyInstance();
wc.hIcon := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION);
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 := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION);
RETURN Windows.RegisterClassEx (wc)#0;
END InitApplication;
(*++++*****************************************************************)
PROCEDURE InitMainWindow () : BOOLEAN;
(**********************************************************************)
BEGIN
hwnd := Windows.CreateWindow
(szAppName, (* window class name *)
"Keyboard Message Looker, Translation to XDS Modula-2",
(* window caption *)
Windows.WS_OVERLAPPEDWINDOW, (* window style *)
Windows.CW_USEDEFAULT, (* initial x position *)
Windows.CW_USEDEFAULT, (* initial y position *)
Windows.CW_USEDEFAULT, (* initial x size *)
Windows.CW_USEDEFAULT, (* initial y size *)
NIL, (* parent window handle *)
NIL, (* window menu handle *)
Windows.MyInstance(), (* program instance handle *)
NIL); (* creation parameters *)
IF hwnd = NIL THEN
RETURN FALSE;
END;
Windows.ShowWindow (hwnd, Windows.SW_SHOWDEFAULT);
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 KeyLook.