tobago selectOne onchange attribute

[Nazar Stasiv <ns...@yahoo.com>]

Hello all,

which is the right way to call bean action method  with selectOne 
onchange attribute. It is stated that onchange references javascript 
method to call when value of component changes.

I've got this for jsf code

<tx:selectOneChoice id="instances_apply_filter" 
action="#{instances.filterChange}" value="#{instances.currentFilter}" 
label="Select" onchange="invokeAction('instances_apply_filter')" >
            <f:selectItems value="#{instances.definedFilters}"/>
</tx:selectOneChoice>

and this for invokeAction javascript function included in .js file
function invokeAction(actionComponentId) {
    Tobago.submitAction(actionComponentId);
}

But this won't work as action attribute is invalid for 
tx:selectOneChoice component

or this message javax.servlet.jsp.JspException Component 
instances_apply_filter is no ActionSource
if added <f:actionListener type="#{instances.filterChange}"/> child 
element to tx:selectOneChoice

Page should update automatically when value changes.Any ideas ?

Is there "fake" component, not visible to user, to call its action ?

Thank You
Nazar

Re: tobago selectOne onchange attribute

[Volker Weber <us...@weber-oldenburg.de>]

Hi Nazar,

yes some ideas :-), we had a simular problem last week.

If you need a action method executed on server you can add a invisible
tc:link element.
If you don't need to execute a action, just rerender the page you can
use the id of the tx:selectOneChoice in Tobago.submitAction(). (Only
with latest sources, i fixed this in UIPage last friday)

But you need the *full* generated html id, e.g including the id of page
tag, not just the 'instances_apply_filter'.

You can render (nearly) invisible tc:link with this:

 <tc:link action="#{instances.filterChange}" id="filterChange" />

if your page contains a empty tc:cell just render this into, or add it
somewhere to a panel and set layout for this cell to '1px' (this is what
i mean with nearly invisible, you can't see the link but it needs
additional 1px space)

Than you can invoke Tobago.submitAction('<pageid>:filterChange') to
execute this action on server.

Hope this helps.

Regards,
  Volker
	

Nazar Stasiv wrote:
> Hello all,
> 
> which is the right way to call bean action method  with selectOne
> onchange attribute. It is stated that onchange references javascript
> method to call when value of component changes.
> 
> I've got this for jsf code
> 
> <tx:selectOneChoice id="instances_apply_filter"
> action="#{instances.filterChange}" value="#{instances.currentFilter}"
> label="Select" onchange="invokeAction('instances_apply_filter')" >
>            <f:selectItems value="#{instances.definedFilters}"/>
> </tx:selectOneChoice>
> 
> and this for invokeAction javascript function included in .js file
> function invokeAction(actionComponentId) {
>    Tobago.submitAction(actionComponentId);
> }
> 
> But this won't work as action attribute is invalid for
> tx:selectOneChoice component
> 
> or this message javax.servlet.jsp.JspException Component
> instances_apply_filter is no ActionSource
> if added <f:actionListener type="#{instances.filterChange}"/> child
> element to tx:selectOneChoice
> 
> Page should update automatically when value changes.Any ideas ?
> 
> Is there "fake" component, not visible to user, to call its action ?
> 
> Thank You
> Nazar
> 

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