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From: bni@modulex.dk (Bent Nielsen)
Newsgroups: comp.windows.x.motif
Subject: Re: -- Traversal & scrolling --
Message-ID: <725@modulex.dk>
Date: 28 Mar 91 03:40:18 GMT
References: <36.27EF987F@resq.fidonet.org>
Organization: A/S MODULEX, Copenhagen, Denmark
Lines: 44

Uucp@resq.fidonet.org (Uucp) writes:
-- stuff deleted --
>- We have windows with a lot of fields;
>  Currenlty, if you tab from the last visible field into a scrollable
>  window, you go to the first visible field .

>  It is VERY VERY USEFUL according to our customer that we must scroll
>  the window and put the focus on the "next logical field".

>  I realize that the application must be involved in some way to resolve
>  how to scroll to the next field (i.e.: MINIMUN_SCROLLING, CENTERING_FIELD,
>  SCROLL_TO_ALIGN_LEFT, SCROLL_PAGE, ....,SCROLL_NONE=as_is_now)

>  I cannot replace all the traversal code (we must work without bug on 1.1.1
>  and XmProcessTraversal does not seem to work) but I do not see
>  an easy way to do this.

>  What I must do? Fix XmProcessTraversal and work with my motif version,
>  remove all traversal code and replace with something more "neutral"
>  (not so rich, but working) or waiting for a Motif version working
>  with R4 that solve my problems?

I had the problem as you describe here and my solution are the following:

I change to translation for TAB and Shift-TAB for the widgets in the scrolled
window.

In these translations I scroll the window by handling the scrollbars and use
XmProcessTraversal(widget, XmTRAVERSE_CURRENT) together with
XtSetKeyboardFocus().

The reason why I also is using XtSetKeyboardFocus() is that XmProcessTraversal
will NOT allways move the focus on a invisible widget (I have read that using
XtSetKeyboardFocus in Motif will confuse traversal, but in my case it's
working)

If you want I can e-mail you some sample code.

--
Bent Nielsen		<bni@modulex.dk>
A/S MODULEX		Phone:    +45 44 53 30 11
Lyskaer 15		Telefax:  +45 44 53 30 74
DK-2730 Herlev
Denmark