Path: utzoo!attcan!uunet!cs.utexas.edu!usc!apple!bloom-beacon!ATHENA.MIT.EDU!swick
From: swick@ATHENA.MIT.EDU (Ralph R. Swick)
Newsgroups: comp.windows.x
Subject: Re: Resetting asciiStringWidgets
Message-ID: <8906291428.AA02029@LYRE.MIT.EDU>
Date: 29 Jun 89 14:28:47 GMT
References: <8906231731.AA04586@air>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: DEC/MIT Project Athena
Lines: 36


     Date:  Fri, 23 Jun 89 12:31:54 CDT
     From:  wjhagins@vuse.vanderbilt.edu (William J. Hagins)

     I have several asciiStringWidgets managed by a formWidget, and I want a
     loop to refresh the widgets (i.e., reset the strings to nulls).
     ...
     Can anyone offer a solution
     to this problem.

Do this:

{
    XtTextBlock text;
    XtTextPosition last;

    text.ptr = NULL;
    text.firstPos = 0;
    text.length = 0;
    text.format = FMT8BIT;

    last = number_of_characters_in_current_string;

    if (XtTextReplace(w, 0, last, &text)) {
	/* an error occurred */
    }
}

If you don't know the size of the current string, here's a hack
to retrieve it, given the limitations of the R3 AsciiString widget:

{
    XtTextPosition last;
    XtTextSetInsertionPoint(w, 9999999);
    last = XtTextGetInsertionPoint(w);
}