trigger bind control bug test

Below is a test file for a possible bug when a bind is
applied to a trigger control. You can run this in the
XForms sandbox to see what happens. See the XML
comment just beneath the root element of the form for
a description of the form, expected behavior, and
unexpected behavior.

If this isn't a bug I need to understand what I'm
doing wrong relative to the control's bind statement.

Thanks,

Don
*******************
<?xml version="1.0" encoding="utf-8"?>
<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
xmlns:xxforms="http://orbeon.org/oxf/xml/xforms"
xmlns:ev="http://www.w3.org/2001/xml-events"
xmlns:xforms="http://www.w3.org/2002/xforms"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" >
<!--
  Form contains four items, each with two properties:
"selected" and "trigger". Values for "selected" are
either 'true' or 'false' and values for "trigger" are
either 'show' or 'hide'. Default values for each are,
respectively, 'false' and 'show'.

  Bind statements apply to the "trigger" nodeset of
items 1 and 2 making the nodeset relevant when the
element's value is "show". Bind attributes are placed
on the <trigger> controls of items 1 and 2  in the
view.
 
  The select buttons for items 1 and 2 to disappear
when items 3 or 4 are selected (as expected). However,
the select buttons for items 1 and 2 no longer work at
all (which is unexpected). Is this a bug?

-->

 <xhtml:head>
  <xhtml:title>Test</xhtml:title>
  <xforms:model>
   <xforms:instance id="test-instance">
    <test>
     <section1/>
     <section2>
      <list_A>
       <item_1>
        <selected>false</selected>
        <trigger>show</trigger>
       </item_1>
       <item_2>
        <selected>false</selected>
        <trigger>show</trigger>
       </item_2>
       <item_3>
        <selected>false</selected>
        <trigger>show</trigger>
       </item_3>
       <item_4>
        <selected>false</selected>
        <trigger>show</trigger>
       </item_4>
      </list_A>
     </section2>
    </test>
   </xforms:instance>
   <xforms:bind id="trigger_item_1"
nodeset="/test/section2/list_A/item_1/trigger"
relevant="/test/section2/list_A/item_1/trigger='show'"/>
   <xforms:bind id="trigger_item_2"
nodeset="/test/section2/list_A/item_2/trigger"
relevant="/test/section2/list_A/item_2/trigger='show'"/>
  </xforms:model>
 </xhtml:head>
 <xhtml:body>
  <xhtml:p >Test</xhtml:p>
  <xhtml:table border="1">
   <xhtml:tr  >
    <xhtml:td >&#160;</xhtml:td>
    <xhtml:td >Item 1</xhtml:td>
    <xhtml:td >Item 2</xhtml:td>
    <xhtml:td >Item 3</xhtml:td>
    <xhtml:td >Item 4</xhtml:td>
   </xhtml:tr>
   <xhtml:tr>
    <xhtml:td >&#160;</xhtml:td>
    <xhtml:td >    
     <xforms:trigger bind="trigger_item_1">
      <xforms:label>Select Item 1</xforms:label>
      <xforms:action ev:event="DOMActivate">
       <xforms:setvalue
ref="section2/list_A/item_1/selected">true</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_1/trigger">show</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/trigger">hide</xforms:setvalue>
      </xforms:action>
     </xforms:trigger>
    </xhtml:td>
    <xhtml:td >    
     <xforms:trigger bind="trigger_item_2">
      <xforms:label>Select Item 2</xforms:label>
      <xforms:action ev:event="DOMActivate">
       <xforms:setvalue
ref="section2/list_A/item_1/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/selected">true</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_1/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/trigger">show</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/trigger">hide</xforms:setvalue>
      </xforms:action>
     </xforms:trigger>
    </xhtml:td>
    <xhtml:td >    
     <xforms:trigger >
      <xforms:label>Select Item 3</xforms:label>
      <xforms:action ev:event="DOMActivate">
       <xforms:setvalue
ref="section2/list_A/item_1/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/selected">true</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_1/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/trigger">show</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/trigger">hide</xforms:setvalue>
     
      </xforms:action>
     </xforms:trigger>
    </xhtml:td>
    <xhtml:td >    
     <xforms:trigger >
      <xforms:label>Select Item 4</xforms:label>
      <xforms:action ev:event="DOMActivate">
       <xforms:setvalue
ref="section2/list_A/item_1/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/selected">false</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/selected">true</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_1/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_2/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_3/trigger">hide</xforms:setvalue>
       <xforms:setvalue
ref="section2/list_A/item_4/trigger">show</xforms:setvalue>
      </xforms:action>
     </xforms:trigger>
    </xhtml:td>
   </xhtml:tr>
   <xhtml:tr>
    <xhtml:td >Selected</xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_1/selected"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_2/selected"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_3/selected"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_4/selected"/>
    </xhtml:td>
   </xhtml:tr>
   <xhtml:tr>
    <xhtml:td >Trigger</xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_1/trigger"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_2/trigger"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_3/trigger"/>
    </xhtml:td>
    <xhtml:td>
     <xforms:output
ref="instance('test-instance')/section2/list_A/item_4/trigger"/>
    </xhtml:td>
   </xhtml:tr>
  </xhtml:table>
  <xhtml:p>
   <xforms:trigger>
    <xforms:label>Reset All</xforms:label>
    <xforms:action ev:event="DOMActivate">
     <xforms:setvalue
ref="section2/list_A/item_1/selected">false</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_1/trigger">show</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_2/selected">false</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_2/trigger">show</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_3/selected">false</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_3/trigger">show</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_4/selected">false</xforms:setvalue>
     <xforms:setvalue
ref="section2/list_A/item_4/trigger">show</xforms:setvalue>
    </xforms:action>
   </xforms:trigger>
  </xhtml:p>  
 
 </xhtml:body>
</xhtml:html>


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Don,

> If this isn't a bug I need to understand what I'm
> doing wrong relative to the control's bind statement.

it works if you set the xpath in the reference in an absolute way,
eigther by using instance() or by adding the root-element:

>      <xforms:trigger bind="trigger_item_1">
>       <xforms:label>Select Item 1</xforms:label>
>       <xforms:action ev:event="DOMActivate">
>        <xforms:setvalue
> ref="instance('test-instance')section2/list_A/item_1/selected">true</xforms:setvalue>
>        <xforms:setvalue
> ref="/test/section2/list_A/item_2/selected">false</xforms:setvalue>
>        <xforms:setvalue

So, the evaluation context may be different between the two trigger groups.

HTH
florian



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Florian,

Yes, that does the trick. Thanks.

Now I'd like to understand why the XPath context is
different.

Thanks again.

Don

--- Florian Schmitt <[hidden email]>
wrote:
ref="/test/section2/list_A/item_2/selected">false</xforms:setvalue>

     



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Don,

On Tue, May 13, 2008 at 4:38 AM, Don Smith <[hidden email]> wrote:
> Now I'd like to understand why the XPath context is
> different.

The difference with the first 2 trigger is that you have a "bind"
attribute on those. This binds the trigger to node specified, but also
everything declared inside the trigger is evaluated in the context of
that node.

Alex
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Orbeon's Blog: http://www.orbeon.com/blog/
Personal Blog: http://avernet.blogspot.com/
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Alex,

>This binds the trigger to node specified, but also
> everything declared inside the trigger is evaluated
> in the context of that node.

OK. Thanks. Like XSLT, it's crucial to know your XPath
context -- which I guess in XForms lingo is call the
evaluation context.

Is there a listing somewhere of the various XForm
elements that *change* the evaluation context? I know,
for example, that the <group> element sets a new
evaluation context. Now I know that adding a bind
attribute does so as well. Or is there a quick way to
identify in the XForms specification which elements
change the evaluation context?

Thanks,

Don


     



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Don,

On Fri, May 16, 2008 at 7:31 AM, Don Smith <[hidden email]> wrote:
> Is there a listing somewhere of the various XForm
> elements that *change* the evaluation context? I know,
> for example, that the <group> element sets a new
> evaluation context. Now I know that adding a bind
> attribute does so as well. Or is there a quick way to
> identify in the XForms specification which elements
> change the evaluation context?

There is some general verbiage in section 7.2
(http://www.w3.org/TR/xforms11/#expr-eval), but you will find more
throughout the specification. See for instance section 10.3 for the
<xforms:insert> (http://www.w3.org/TR/xforms11/#action-insert) which
is one of the most complex cases.

Alex
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Orbeon's Blog: http://www.orbeon.com/blog/
Personal Blog: http://avernet.blogspot.com/
Twitter - http://twitter.com/avernet


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