Path: utzoo!censor!geac!jtsv16!uunet!mstan!s6!chuck
From: chuck@Morgan.COM (Chuck Ocheret)
Newsgroups: comp.windows.x
Subject: Changing case in a Motif Text Widget?
Message-ID: <CHUCK.89Nov7121348@s6.Morgan.COM>
Date: 7 Nov 89 17:13:48 GMT
Distribution: comp.windows.x
Organization: Morgan Stanley & Co., Inc., NY NY
Lines: 49

All I want to do is have a Text widget which inverts upper/lower
case keystrokes. That is, when you type a lower case 'm', an upper
case 'M' should appear in the widget and vice versa.  Other keys
should be unaffected.

Section 10.5, "KeyCode-to-KeySym Conversions" of the X Intrinsics
manual (X11, Release 3, Oct. 1988) specifies how to provide your own
key translator with XtSetKeyTranslator().  After lifting code for
the default key translator, the following translator was produced:

void myTranslateKey(dpy, keycode, modifiers,
                            modifiers_return, keysym_return)
	Display		*dpy;
	KeyCode		keycode;
	Modifiers	modifiers;
	Modifiers	*modifiers_return;
	KeySym		*keysym_return;
{
	KeySym		ks;
	XtPerDisplay	perDisplay;

	perDisplay = _XtGetPerDisplay(dpy);
	*modifiers_return = 0;
	if ((modifiers & StandardMask) == 0)
		ks =_XtKeyCodeToKeySym(dpy,perDisplay,keycode,0);
	else if ((modifiers & (ShiftMask | LockMask)) != 0)
		ks =_XtKeyCodeToKeySym(dpy,perDisplay,keycode,1);
	else
		ks = NoSymbol;

	if (ks >= XK_a && ks <= XK_z)
		ks = ks-0x20;
	else if (ks >= XK_A && ks <= XK_Z)
		ks = ks+0x20;

	*keysym_return = ks;
}

Dbx shows that this function does indeed get called and it does the
translation.  However, the Text widget still shows untranslated
keystrokes.  What am I doing wrong?  Is there some other mechanism
I should be using?  Do I really have to provide a big table for the
translation manager?

--
+------------------+   Chuck Ocheret, Sr. Staff Engineer   +------------------+
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