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conditional within a trigger

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Edpriwer

conditional within a trigger

I have a button that allows users to Add items to a list. There is a maximum number of items that they may add, and I want to alert them when they attempt to add more than the maximum allowed. I haven't been able to work out how to do this - could someone please point me in the right direction. Here's the pseudo code of what I want to do:

<xforms:trigger>
<xforms:label>Add Item</xforms:label>

<xforms:action ev:event="DOMActivate">

if(count(items) = maximum)
<xforms:message level="modal">Max number of items already input</xforms:message>

else
<xforms:insert at="last()".../>

</xforms:action>
</xforms:trigger>

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Adrian Baker

Re: conditional within a trigger

Rather than wrapping the message & insert in an if..else structure, you
just need to add an 'if' attribute to each:

<xforms:message if="count(items) = maximum" level="modal">Max number of items already input</xforms:message>
<xforms:insert if="not(count(items) = maximum)" at="last()".../>

Adrian

[hidden email] wrote:

> I have a button that allows users to Add items to a list. There is a maximum number of items that they may add, and I want to alert them when they attempt to add more than the maximum allowed. I haven't been able to work out how to do this - could someone please point me in the right direction. Here's the pseudo code of what I want to do:
>
> <xforms:trigger>
> <xforms:label>Add Item</xforms:label>
>
> <xforms:action ev:event="DOMActivate">
>
> if(count(items) = maximum)
> <xforms:message level="modal">Max number of items already input</xforms:message>
>
> else
> <xforms:insert at="last()".../>
>
> </xforms:action>
> </xforms:trigger>
>
>
>
> ------------------------------------------------------------------------
>
>
> --
> You receive this message as a subscriber of the [hidden email] mailing list.
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Edpriwer

Re: conditional within a trigger

Thanks, that works nicely. It isn't particularly elegant though in
situations where I have many things to do, and have to repeat the "if"
attribute for several tags. Nonetheless, I'm happy there's a solution,
thanks again.

Adrian Baker wrote:

> Rather than wrapping the message & insert in an if..else structure,
> you just need to add an 'if' attribute to each:
>
> <xforms:message if="count(items) = maximum" level="modal">Max number
> of items already input</xforms:message>
> <xforms:insert if="not(count(items) = maximum)" at="last()".../>
>
> Adrian
>
>
> [hidden email] wrote:
>> I have a button that allows users to Add items to a list. There is a
>> maximum number of items that they may add, and I want to alert them
>> when they attempt to add more than the maximum allowed. I haven't
>> been able to work out how to do this - could someone please point me
>> in the right direction. Here's the pseudo code of what I want to do:
>>
>> <xforms:trigger>
>> <xforms:label>Add Item</xforms:label>
>> <xforms:action ev:event="DOMActivate">
>> if(count(items) = maximum)
>> <xforms:message level="modal">Max number of items already
>> input</xforms:message>
>>
>> else
>> <xforms:insert at="last()".../>
>>
>> </xforms:action>
>> </xforms:trigger>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> --
>> You receive this message as a subscriber of the
>> [hidden email] mailing list.
>> To unsubscribe: mailto:[hidden email]
>> For general help: mailto:[hidden email]?subject=help
>> ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
>>
>
>
> ------------------------------------------------------------------------
>
>
> --
> You receive this message as a subscriber of the [hidden email] mailing list.
> To unsubscribe: mailto:[hidden email]
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>

Marcus-2

Re: conditional within a trigger

Hi,
you can also bind conditionals to your triggers - just see the
"government-forms"-example!
And there you use the "relevant"-attribute. When your condition is true, the
trigger will be displayed, otherwise it won't.
Perhaps that's a bit more the way you'll like to do that?

Marcus

----- Original Message -----
From: "Edward Priwer" <[hidden email]>
To: <[hidden email]>
Sent: Tuesday, April 17, 2007 9:39 AM
Subject: Re: [ops-users] conditional within a trigger

> Thanks, that works nicely. It isn't particularly elegant though in
> situations where I have many things to do, and have to repeat the "if"
> attribute for several tags. Nonetheless, I'm happy there's a solution,
> thanks again.
>
> Adrian Baker wrote:
>> Rather than wrapping the message & insert in an if..else structure,
>> you just need to add an 'if' attribute to each:
>>
>> <xforms:message if="count(items) = maximum" level="modal">Max number
>> of items already input</xforms:message>
>> <xforms:insert if="not(count(items) = maximum)" at="last()".../>
>>
>> Adrian
>>
>>
>> [hidden email] wrote:
>>> I have a button that allows users to Add items to a list. There is a
>>> maximum number of items that they may add, and I want to alert them
>>> when they attempt to add more than the maximum allowed. I haven't
>>> been able to work out how to do this - could someone please point me
>>> in the right direction. Here's the pseudo code of what I want to do:
>>>
>>> <xforms:trigger>
>>> <xforms:label>Add Item</xforms:label>
>>> <xforms:action ev:event="DOMActivate">
>>> if(count(items) = maximum)
>>> <xforms:message level="modal">Max number of items already
>>> input</xforms:message>
>>>
>>> else
>>> <xforms:insert at="last()".../>
>>>
>>> </xforms:action>
>>> </xforms:trigger>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>>
>>> --
>>> You receive this message as a subscriber of the
>>> [hidden email] mailing list.
>>> To unsubscribe: mailto:[hidden email]
>>> For general help: mailto:[hidden email]?subject=help
>>> ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
>>>
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> --
>> You receive this message as a subscriber of the [hidden email]
>> mailing list.
>> To unsubscribe: mailto:[hidden email]
>> For general help: mailto:[hidden email]?subject=help
>> ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
>>
>
>

--------------------------------------------------------------------------------

>
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>

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Adrian Baker

Re: conditional within a trigger

In reply to this post by Edpriwer

If you've got lots of things to do you can group them together inside <xf:action>, and put the conditional on that.

But you're still stuck repeating the condition twice, which isn't great.

Also as Marcus mentioned you can hide/disable the trigger when the maximum number is reached.

Adrian

Edward Priwer wrote:

Thanks, that works nicely. It isn't particularly elegant though in situations where I have many things to do, and have to repeat the "if" attribute for several tags. Nonetheless, I'm happy there's a solution, thanks again.

Adrian Baker wrote:

Rather than wrapping the message & insert in an if..else structure, you just need to add an 'if' attribute to each:

<xforms:message if="count(items) = maximum" level="modal">Max number of items already input</xforms:message>
<xforms:insert if="not(count(items) = maximum)" at="last()".../>

Adrian

[hidden email] wrote:

I have a button that allows users to Add items to a list. There is a maximum number of items that they may add, and I want to alert them when they attempt to add more than the maximum allowed. I haven't been able to work out how to do this - could someone please point me in the right direction. Here's the pseudo code of what I want to do:

<xforms:trigger>
<xforms:label>Add Item</xforms:label>
    <xforms:action ev:event="DOMActivate">
      if(count(items) = maximum)
      <xforms:message level="modal">Max number of items already input</xforms:message>

    else
      <xforms:insert at="last()".../>

</xforms:action>
</xforms:trigger>

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