Path: utzoo!attcan!uunet!husc6!bloom-beacon!athena.mit.edu!tldavis
From: tldavis@athena.mit.edu (Timothy Davis)
Newsgroups: comp.windows.x
Subject: Re: Athena text widgets
Summary: Xaw asciiText widget needs more functionality
Message-ID: <6426@bloom-beacon.MIT.EDU>
Date: 26 Jul 88 17:40:31 GMT
References: <6190@bloom-beacon.MIT.EDU> <5397@eagle.ukc.ac.uk>
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: tldavis@athena.mit.edu (Timothy Davis)
Organization: Massachusetts Institute of Technology
Lines: 39

In article <6190@bloom-beacon.MIT.EDU> Dan Schmidt writes:
>I would like to display some text in the [Athena text] widget, and
>subsequently change the text from time to time...

I use the XtTextBlock definition in <TextP.h>, along with a few
convenience routines which may or may not be staying around.  This worked in
the X10 toolkit and seems to be working in my X11 port:

XtTextBlock newTextBlock = { 0, 11, "Test String");
XtTextPosition top;
XtTextSetLastPos(w, (top=XtTextTopPosition(w))); /* delete the current text */
        /* above necessary to get it to work in both X10 and X11 */
XtTextReplace(w,top,top,&newTextBlock); 
        /* would be the only routine required if it worked as advertised */

----------
I have another problem with the asciiText widget, related to the 
design of the callback registration mechanism:

This widget has no mechanism which I can find to call user callback
routines!  The simple addition of an XtNcallback callback list, and a Notify
action in the actions table which would do XtCallCallbacks() would add much
needed functionality.  One could grab the contents of a text edit window
when the user has filled it in and hit, for example, the RETURN or DO keys.

Shouldn't there be a minimum callback functionality for any widget which
supports translation management?  I would have expected the XtNcallback list 
to be a part of Core or Simple.  I sincerely don't want to have to write
a subclass widget of asciiTextWidgetClass in order to add my needed 
functionality.

By the way, I can't get XtAddEventHandler() to register my (second) event
handler to a widget either.  That's another option to the above.  If anyone
has a way to make XtAddEventHandler() work for the text widget, please send 
me sample code.

Thanks,
Tim Davis
Student Courseware Development, MIT