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From: pjp@sloth.mlb.semi.harris.com (Pat J. Pinchera)
Newsgroups: comp.windows.x.motif
Subject: Re: auto-traverse of text widgets
Summary: a solution to auto-traverse of text widgets
Keywords: XmAddTabGroup, XtOverrideTranslations
Message-ID: <1991May7.165837.7431@mlb.semi.harris.com>
Date: 7 May 91 16:58:37 GMT
References: <2801F4F9.5C0D@deneva.sdd.trw.com>
Sender: news@mlb.semi.harris.com
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Organization: Interface & Control Systems, Inc.
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In article <2801F4F9.5C0D@deneva.sdd.trw.com> rroux@rigel.sdd.trw.com () writes:
>
>I'm stumped.  I have a bulletinboard widget that contains two single line
>text widgets and a couple labels.  I want to be able to press <Return> 
>in one of the text widgets and have the focus automatically shift to the
>other text widget.
>
>I tried using XtSetKeyboardFocus with limited success.  The focus _does_
>change, but the text cursor in the first widget keeps blinking.  It seems
>that there is confusion between the program and the window manager as to
>which widget really has the focus.
>
>Is there a better/another way?  By the way, I'm using Motif 1.0.3 and the
>X11R3 libraries, but running X11R4.
>


I had to add the widget(s) to a tab group so that a regular
<Tab> would make the cursor move between the text fields. Then I had to
make the <Return> look like a <Tab> to Motif; this is done with 
XtOverrideTranslations.

Here is a code excerpt:

        /*
	** make the text widgets part of a 'Tab Group' so that user
	** can tab between text fields. See PG9-3, PG1-6, PR1-163
	** PG = Motif Programmer's Guide, v1.0, 
	** PR = Motif Programmer's Reference, v1.0
	*/
	XmAddTabGroup ( widget );
						       
        /*
        ** make <Return>, Down-Arrow act like a Tab;
        ** make Up-Arrow act like a Shift-Tab (back tab)
        */
        XtOverrideTranslations(widget, XtParseTranslationTable
                                    ("<Key>Return:next-tab-group()\n\
                                      <Key>Down:next-tab-group()  \n\
                                      <Key>Up:prev-tab-group()"));

I had  heard of these two functions, XmAddTabGroup & XtOverrideTranslations,
but never thought of where/when they could be used, and if I did, I surely
didn't know exactly how to code them, i.e. syntax and such.
When I got these examples from someone on the net, it became obvious.
Now I wonder how many other 'amazing' feats can be accomplished with Motif!!!
-- 
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  Patrick J. Pinchera            |  Interface & Control Systems, Inc.
  pjp@sloth.mlb.semi.harris.com  |  Melbourne, Florida, USA
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