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From: vania@osf.ORG (Vania Joloboff)
Newsgroups: comp.windows.x
Subject: Re: focus on motif text widgets
Message-ID: <9104181322.AA06496@osf.osf.org>
Date: 18 Apr 91 13:22:48 GMT
References: <9104171458.AA07989@excess.lcs.mit.edu>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 31


> From: converse@expo.lcs.mit.edu (Donna Converse)
> 
> 
> 	Can anyone out there tell me how I can set the input focus to
> 	a particular instance of a motif text widget?  
> 
>     See the Xt specification, section 7.3, "Focusing Events on a Child"
> 
>   Optimally, yes; in practice the Xt routines don't work and further confuse
>   things. There are various Xm routines (documented and undocumented) which
>   work more reliably.
> 
> In case anyone is confused, they work fine for the Athena widget set.
> Perhaps I should refrain from answering questions when Motif is used! :-)
> 

Motif has a keyboard traversal model that allows to navigate between the various
widgets from the keyboard, a la Windows. It is not appropriate to use
the Xt functions
to set the focus, because it by-passes the Xm function. On later keyboard actions
Motif will have a wrong idea of the current state.

The right function to use is XmProcessTraversal.

To traverse to a widget :

	XmProcessTraversal(widget, XmTRAVERSE_CURRENT)

Note that it only works if the specified widget is traversable. Otherwise it will
set focus to the first traversable widget in the same tab group.