Display group when not relevant

Is it possible to display a group if an element is not relevant? Suppose I want to display some records if an element exists, and if it does not display a message such as, "No Records." Is this possible?

Thanks in advance,
-Tom

Use @appearance="xxforms:internal"

________________________________

From: tom.rudick [mailto:[hidden email]]
Sent: Tue 30/12/2008 17:30
To: [hidden email]
Subject: [ops-users] Display group when not relevant




Is it possible to display a group if an element is not relevant? Suppose I
want to display some records if an element exists, and if it does not
display a message such as, "No Records." Is this possible?

Thanks in advance,
-Tom
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Maybe I am missing something... but I don't see how using xxforms:internal allows me to show a group when something is NOT relevant. Any thoughts on what I'm missing?

-Tom

Ryan Puddephatt-3 wrote

Use @appearance="xxforms:internal"

Quoting from http://www.orbeon.com/ops/doc/reference-xforms-2#internal-group

In general you won't have a need for this appearance, but it is useful as an optimization, as it leads to less HTML sent to the client.

**You may use it when a group is used only to change the in-scope evaluation context for nested controls and when you don't need changes to relevance which apply directly to the group to be reflected in the client**.

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-----Original Message-----
From: tom.rudick [mailto:[hidden email]]
Sent: 02 January 2009 16:39
To: [hidden email]
Subject: [ops-users] RE: Display group when not relevant


Maybe I am missing something... but I don't see how using xxforms:internal allows me to show a group when something is NOT relevant. Any thoughts on what I'm missing?

-Tom


Ryan Puddephatt-3 wrote:
>
> Use @appearance="xxforms:internal"
>

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tom,

> Is it possible to display a group if an element is not relevant? Suppose I
> want to display some records if an element exists, and if it does not
> display a message such as, "No Records." Is this possible?

yes, there are different ways, for example:

- put the condition into the ref atribute of the xforms:group:

<xforms:group ref=".[count(/records/record) gt 0]">...</xforms:group>
<xforms:group ref=".[count(/records/record) eq 0]">...</xforms:group>


- two instances (e.g. "records-instance", "nope") with conditional
relevance, condition in bind:

<xforms:bind
    nodeset="instance('records-instance')"
    relevant="count(instance('records-instance')/records/record) gt 0"
/>

<xforms:bind
    nodeset="instance('nope')"
    relevant="count(instance('records-instance')/records/record) = 0"
/>

...

<xforms:group ref="instance('records-instance')/records/record">
...
</xforms:group>
<xforms:group ref="instance('nope')">
    <xforms:output value="'Sorry, no records'" />
</xforms:group>

Both should work, i'm not sure which one is more efficient

hth
florian


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Thanks Florian,

Works like a charm.

fs(ops-users) wrote

tom,

> Is it possible to display a group if an element is not relevant? Suppose I
> want to display some records if an element exists, and if it does not
> display a message such as, "No Records." Is this possible?

yes, there are different ways, for example:

- put the condition into the ref atribute of the xforms:group:

<xforms:group ref=".[count(/records/record) gt 0]">...</xforms:group>
<xforms:group ref=".[count(/records/record) eq 0]">...</xforms:group>


- two instances (e.g. "records-instance", "nope") with conditional
relevance, condition in bind:

<xforms:bind
    nodeset="instance('records-instance')"
    relevant="count(instance('records-instance')/records/record) gt 0"
/>

<xforms:bind
    nodeset="instance('nope')"
    relevant="count(instance('records-instance')/records/record) = 0"
/>

...

<xforms:group ref="instance('records-instance')/records/record">
...
</xforms:group>
<xforms:group ref="instance('nope')">
    <xforms:output value="'Sorry, no records'" />
</xforms:group>

Both should work, i'm not sure which one is more efficient

hth
florian


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