Re: [Xsltforms-support] Calling Javascript-defined functions from XForms.

[COUTHURES A. <ala...@ag...>]

Hi Franclin,
>   I am trying to call a javascript function from XForms but to no avail.
>   Here is the issue : *How to pass some parameters to a Javascript 
> function from XForms?*
>  Let us consider the following JS function:
>  /function myfunction(par1, par2){
>   alert('You have entered' + par1 + par2 );
>   //Display a Google Map by passing par1 to it.
>  }/
>  Parameters par1 and par2 will be the result of an XPath expression 
> computed by XForms. Ideally, it would be called from XForms like this:
>  /<xf:trigger>
>   <xf:load ref="link that contain the javascript function myfunction"  
> ev:event="DOMActivate">
>  </xf:trigger>/
>
>  As far as I know (I may be wrong, though), the only way to call JS 
> functions from XForms is by using the load method and call the JS 
> function as an external resource.
>  This topics has already been touched on in an article in IBM's 
> DeveloperWorks that is located here:
>  /http://www.ibm.com/developerworks/xml/library/x-xformstipcalljs/index.html/
>  The bottom line is that no parameter is passed to the function which 
> is thus not of great help in my case.
>  This problem has also been touched on here 
> /http://wiki.orbeon.com/forms/projects/client-side-api-for-custom-javascript-widgets/ 
> but again it is not implemented.
>  So here are my questions:
>  1 - How to pass some parameters to a JS method from XForms?
Instead of @ref, the ressource sub element can be used to generate the 
uri with an XPath expression so parameters can be passed using the XPath 
concat() function.
>  2 - Is this feature implemented in XSLTForms?
Yes, it is implemented in XSLTForms.
>  Finally it might be interesting to point that when I try to specify 
> the name of the JS method directly in the ref attribute of the load 
> element, XSLTForms raises an exception by saying that "*Function 
> http://www.w3.org/2005/xpath-functions myfunction() not found*" which 
> makes me think that XSLTForms considers the JS function as an XPath 
> function. How to tell XSLTForms that it is actually a JS function?
With XSLTForms, it's also possible to define its own XPath functions 
with Javascript. There is just a specific template to respect about 
parameters and return value.

-Alain