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RE: Hide/show select options

From: Swithun Crowe <swithun@swithun.servebeer.com>
Date: Mon, 6 Jun 2005 17:02:43 +0100 (BST)
To: Jonathan Curtis <Jonathan.Curtis@sesame.co.uk>
cc: www-forms@w3.org
Message-ID: <Pine.LNX.4.61.0506061639561.18769@abednego.swithun.servebeer.com>

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 16:03:10 GMT

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