Hiding Button within Repeat?

I'm unable to show and hide a button within a repeat, based on the value of an attribute. I've tried a bind to the attribute that determines relevancy, but that makes the button appear or not appear in every row. It seems there is no "if" attribute I can use. How do I make the button show only when the current iteration of a repeat has an attribute with a particular value?

Thanks,
-Jim



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You could do something like this:

<xforms:trigger ref="for $position in position() return .[$position =  
12]">

With recent builds, you can also use variables:

   <xxforms:variable name="position" select="position()"/>
   <xforms:trigger ref=".[$position = 12]">

-Erik

On Jun 2, 2008, at 8:25 PM, Jim Logan wrote:
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Erik Bruchez wrote:

You could do something like this:

<xforms:trigger ref="for $position in position() return .[$position = 12]">

With recent builds, you can also use variables:

  <xxforms:variable name="position" select="position()"/>
  <xforms:trigger ref=".[$position = 12]">

Hi Erik,

Thanks, somehow I missed that a trigger is allowed to have a ref. I got it working with ref=".[@action = 'create']". I'm not sure why the following bind is any different, though. Could you explain please?

<xforms:bind
	id="deletable-version"
	nodeset="instance('asset-instance')/v:Data_asset/v:has_version/v:Data_asset_version/@action"
	relevant=".='create'" />
  

I still have a question about your XPath expression above. I've seen this pattern before somewhere, and I don't understand why the loop is necessary. It looks like it is looping only once and returning a node only if it's the 12th row, otherwise it returns an empty node set. Why can't you just use ".[position() = 12]"? What role does the loop play?

Thanks,
-Jim



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Jim,

On Tue, Jun 3, 2008 at 7:45 AM, Jim Logan <[hidden email]> wrote:
> I still have a question about your XPath expression above. I've seen this
> pattern before somewhere, and I don't understand why the loop is necessary.
> It looks like it is looping only once and returning a node only if it's the
> 12th row, otherwise it returns an empty node set. Why can't you just use
> ".[position() = 12]"? What role does the loop play?

The loop doesn't really "loop", it is just used here to declare a
variable $position (if only "let" was also available in XPath 2.0).
You need to do this because you need position() to be evaluated
outside of the predicate. Inside the predicate, the context changes
and position() is always 1 (so .[position() = 12] would always be
empty).

Alex
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Hi,
I've got some code that generates an xml instance containing  
information about the Vlans we have configured on our network. The  
instance is generated from a back end sql database and is of the form

<vlans>
<vlan>
<vlanid>
<buildingid>
<some other element>
<....
</vlan>
<vlan>
....
</vlan>
etc
</vlans>

I'm currently displaying all of the information for each vlan.
What I'd like to do is have a hide/display control so that by default  
I'd have display only the vlanid and building id to start with with a  
hide/display control next to it that would hide/display all the other  
elements in the <vlan> object

Can someone pint me at some info as to how to do this?

TIA
Alex


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Briefly: use xforms:trigger, an xforms:toggle action, and  
xforms:switch/xforms:case.

-Erik

On Jul 7, 2008, at 7:56 AM, Alex Sharaz wrote:
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