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RE: Hide/show select options

From: Jonathan Curtis <Jonathan.Curtis@sesame.co.uk>
Date: Mon, 6 Jun 2005 17:23:18 +0100
Message-ID: <080D146539A97F4E95B862BF4D9FBCB703B40EC7@chlexc01.sesame.com>
To: "Swithun Crowe" <swithun@swithun.servebeer.com>
Cc: <www-forms@w3.org>

Thanks again for the help. Much appreciated.

On that w3 spec page, on the table it says "The form control (and any children) must be hidden or unavailable to the user. Entering a value or obtaining focus should not be allowed.". I would've thought that applied to items of select.

Going back to your suggestion of

instance('form_data')/select/item[position() != 3 or instance('inst') = 1]

How could I incorporate that into the situation where I also need another item in the select to be hidden/shown depending on a different value? So, for example, how could this:

instance('form_data')/select/item[position() != 1 or instance('inst')/anotherval = 2]

be combined with the one above?

Thanks

Jon

-----Original Message-----
From: Swithun Crowe [mailto:swithun@swithun.servebeer.com]
Sent: 06 June 2005 17:03
To: Jonathan Curtis
Cc: www-forms@w3.org
Subject: RE: Hide/show select options


Hello

Relevance is to do with submission. If a node evaluates as not being
relevant, then it won't get submitted. But the spec' and implementations
are vague about what happens prior to submission.

It is all here:
http://www.w3.org/TR/2003/REC-xforms-20031014/slice6.html#model-prop-relevant

formsPlayer uses CSS to hide irrelevant UI controls but the usual

*.disabled {
  display: none;
}

doesn't seem to work for itemset items, so you may have to take your pick
from the inelegant solutions.

Swithun.


On Mon, 6 Jun 2005, Jonathan Curtis wrote:

> Thanks Swithun. I don't really like the idea of having to force the form to rebuild though. I like things to just 'work' :)
>
> I have come up with this solution (below), which works. I believe my
 original suggestion should work. Perhaps a bug with implementations? Or
 maybe relevant not supposed to be used in this way. I was under the
 impression that when a node was not relevant, it is effectively removed
 from the instance. This can't be happening though, else the first way
would work.
>
> If anyone had a better way, or explaination why my first idea doesn't work, I'd love to hear.
>
> Jon
>
> <html xmlns:xf="http://www.w3.org/2002/xforms" xmlns:ev="http://www.w3.org/2001/xml-events">
>   <head>
>     <title>Test XForm</title>
>     <xf:model>
>       <xf:instance id="inst">
>         <test>1</test>
>       </xf:instance>
>       <xf:instance id="form_data">
>         <form_data>
>           <test>1</test>
>           <select>
>             <value>1</value>
>             <item relevant="true">
>               <label>one</label>
>               <value>1</value>
>             </item>
>             <item relevant="true">
>               <label>two</label>
>               <value>2</value>
>             </item>
>             <item relevant="true">
>               <label>three</label>
>               <value>3</value>
>             </item>
>           </select>
>         </form_data>
>       </xf:instance>
>       <xf:bind id="test" nodeset="/test"/>
>       <xf:bind id="select" nodeset="instance('form_data')/select/value"/>
>       <xf:bind nodeset="instance('form_data')/select/item[3]/@relevant" calculate="instance('inst') = 1"/>
>     </xf:model>
>   </head>
>   <body>
>     <xf:input bind="test">
>       <xf:label>test</xf:label>
>     </xf:input>
>     <xf:select1 bind="select">
>       <xf:label>Select</xf:label>
>       <xf:itemset nodeset="instance('form_data')/select/item[@relevant = 'true']">
>         <xf:label ref="label"/>
>         <xf:value ref="value"/>
>       </xf:itemset>
>     </xf:select1>
>   </body>
> </html>
>
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Received on Monday, 6 June 2005 16:20:57 GMT

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