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Re: Allow xf:setfocus with no @control to set the focus to the event target

From: John Boyer <boyerj@ca.ibm.com>
Date: Tue, 12 Aug 2008 17:32:27 -0700
To: Erik Bruchez <ebruchez@orbeon.com>
Cc: "public-forms (new)" <public-forms@w3.org>
Message-ID: <OF641ECEA2.213A3AE9-ON882574A4.000240B9-882574A4.0002F8E4@ca.ibm.com>
Hi Erik,

Sorry to keep bugging you about this.
While one could use AVTs if they were supported, the issue is that you 
*can* use XForms 1.1 syntax to express this:

   <setfocus>
      <control value="event('target')"/>
   </setfocus>

The problem here, then, reduces to making context information like 
'target' available.  Right now I don't think we say that.  In 1.1 we seem 
to have defined the event-specific context info but nothing that works for 
all events.

Cheers,
John M. Boyer, Ph.D.
Senior Technical Staff Member
Lotus Forms Architect and Researcher
Chair, W3C Forms Working Group
Workplace, Portal and Collaboration Software
IBM Victoria Software Lab
E-Mail: boyerj@ca.ibm.com 

Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer
Blog RSS feed: 
http://www.ibm.com/developerworks/blogs/rss/JohnBoyer?flavor=rssdw





From:
Erik Bruchez <ebruchez@orbeon.com>
To:
"public-forms (new)" <public-forms@w3.org>
Date:
08/12/2008 05:23 PM
Subject:
Re: Allow xf:setfocus with no @control to set the focus to the event 
target




John,

Sorry about, that, you are right of course.

This is an issue I would obviously solve with AVTs:

   <setfocus value="{event('target')}"/>

-Erik

On Aug 12, 2008, at 5:13 PM, John Boyer wrote:

>
> Hi Erik,
>
> Actually, I was getting at the fact that your example (in the linked 
> email) uses an XPath in the attribute value of the control attribute.
> So what if someone wants to use the control attribute properly by 
> putting an IDREF in it?
> You would evaluate it as an XPath expression, possibly get a 
> resulting node that happens to contain a string that points to 
> another object.
> Like this:
>
> <data>
>    <x>y</x>
> </data>
>
> ...
>
> <setfocus control="x"/>
>
> ...
>
> <input id="x"> ...
>
> <input id="y"> ...
>
> If you evaluate control as an XPath whose string result gievs you an 
> IDREF, then the focus will go to the second input.
> But correct XForms treats the control attribute as an IDREF, not an 
> XPath, so the focus should go to the first input.
>
> Cheers,
> John M. Boyer, Ph.D.
> Senior Technical Staff Member
> Lotus Forms Architect and Researcher
> Chair, W3C Forms Working Group
> Workplace, Portal and Collaboration Software
> IBM Victoria Software Lab
> E-Mail: boyerj@ca.ibm.com
>
> Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer
> Blog RSS feed: 
http://www.ibm.com/developerworks/blogs/rss/JohnBoyer?flavor=rssdw
>
>
>
>
> From:
> Erik Bruchez <ebruchez@orbeon.com>
> To:
> "public-forms (new)" <public-forms@w3.org>
> Date:
> 08/12/2008 04:58 PM
> Subject:
> Re: Allow xf:setfocus with no @control to set the focus to the event 
> target
>
>
>
>
>
> A solution would be to return the id if it exists. Then this would
> work for controls that have ids.
>
> -Erik
>
> On Aug 12, 2008, at 4:46 PM, John Boyer wrote:
>
> >
> > Hi Erik,
> >
> > Yes, but the datatype for the control attribute is IDREF.  Something
> > similar would be good though:
> >
> > <setfocus>
> >    <control value="event(blah)"/>
> > </setfocus>
> >
> > Cheers,
> > John M. Boyer, Ph.D.
> > Senior Technical Staff Member
> > Lotus Forms Architect and Researcher
> > Chair, W3C Forms Working Group
> > Workplace, Portal and Collaboration Software
> > IBM Victoria Software Lab
> > E-Mail: boyerj@ca.ibm.com
> >
> > Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer
> > Blog RSS feed: 
http://www.ibm.com/developerworks/blogs/rss/JohnBoyer?flavor=rssdw
> >
> >
> >
> >
> > From:
> > Erik Bruchez <ebruchez@orbeon.com>
> > To:
> > "public-forms (new)" <public-forms@w3.org>
> > Date:
> > 08/12/2008 03:10 PM
> > Subject:
> > Re: Allow xf:setfocus with no @control to set the focus to the
> > event  target
> >
> >
> >
> >
> >
> > Not a huge fan of it either, hence my reference to the way we do 
> it in
> > our implementation. [1]
> >
> > -Erik
> >
> > [1] http://lists.w3.org/Archives/Public/public-forms/2008Aug/0017.html
> >
> > On Aug 12, 2008, at 2:01 PM, John Boyer wrote:
> >
> > >
> > > I thought the point of the ID magic was exactly so that you didn't
> > > have to think about it.
> > > It just does intelligently what is most likely what the form 
> author
> > > meant.
> > >
> > > Does it really make sense to try to focus the event target? 
> What if
> > > a sequence of actions is grouped together and invoked from 
> multiple
> > > locations using dispatch?
> > >
> > > It seems an odd thing to see <setfocus/> without any indication of
> > > what the focus is being set to.
> > >
> > > -1 from me.
> > >
> > > John M. Boyer, Ph.D.
> > > Senior Technical Staff Member
> > > Lotus Forms Architect and Researcher
> > > Chair, W3C Forms Working Group
> > > Workplace, Portal and Collaboration Software
> > > IBM Victoria Software Lab
> > > E-Mail: boyerj@ca.ibm.com
> > >
> > > Blog: http://www.ibm.com/developerworks/blogs/page/JohnBoyer
> > > Blog RSS feed: 
http://www.ibm.com/developerworks/blogs/rss/JohnBoyer?flavor=rssdw
> > >
> > >
> > >
> > >
> > > From:
> > > Ulrich Nicolas Lissť <unl@dreamlab.net>
> > > To:
> > > Mark Birbeck <mark.birbeck@webbackplane.com>
> > > Cc:
> > > public-forms <public-forms@w3.org>
> > > Date:
> > > 08/12/2008 01:04 PM
> > > Subject:
> > > Re: Allow xf:setfocus with no @control to set the focus to the
> > > event  target
> > >
> > >
> > >
> > >
> > >
> > > Mark,
> > >
> > > +1 from me. Makes it easy to set focus within repeats without
> > > needing to
> > > understand id magic.
> > >
> > > Regards,
> > > Uli.
> > >
> > > Mark Birbeck wrote:
> > > > Hello all,
> > > >
> > > > I was just looking something up in the spec, and noticed that if
> > > > @control is omitted from the use of xf:setfocus then nothing
> > > happens.
> > > >
> > > > It occurred to me that omitting @control and defaulting to the
> > event
> > > > target might actually be a useful pattern.
> > > >
> > > > This example is a little contrived, because I've only just 
> thought
> > > of
> > > > the whole thing, but bear with me....
> > > >
> > > > Ordinarily, setting focus on a control when it is invalid 
> could be
> > > > done like this:
> > > >
> > > >   <xf:input id="me" ref="x">
> > > >     <xf:label>X:</xf:label>
> > > >     <xf:setfocus control="me" ev:event="xforms-invalid" />
> > > >   </xf:input>
> > > >
> > > > But that requires naming the control with an @id, and then
> > ensuring
> > > > that the @control value and the control name are in sync. An
> > easier
> > > > and more maintainable way would be:
> > > >
> > > >   <xf:input ref="x">
> > > >     <xf:label>X:</xf:label>
> > > >     <xf:setfocus ev:event="xforms-invalid" />
> > > >   </xf:input>
> > > >
> > > > If people don't like simply omitting @control, an alternative
> > > would be:
> > > >
> > > >   <xf:input ref="x">
> > > >     <xf:label>X:</xf:label>
> > > >     <xf:setfocus control="" ev:event="xforms-invalid" />
> > > >   </xf:input>
> > > >
> > > > Regards,
> > > >
> > > > Mark
> > > >
> > >
> > > --
> > > Ulrich Nicolas Lissť
> > >
> > >
> > >
> > >
> >
> > --
> > Orbeon Forms - Web Forms for the Enterprise Done the Right Way
> > http://www.orbeon.com/
> >
> >
> >
> >
>
> --
> Orbeon Forms - Web Forms for the Enterprise Done the Right Way
> http://www.orbeon.com/
>
>
>
>

--
Orbeon Forms - Web Forms for the Enterprise Done the Right Way
http://www.orbeon.com/
Received on Wednesday, 13 August 2008 00:33:20 UTC

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