Can datascroller submit values on scrolling ?

[martinjozef]

i have many inputs fields inside a dataTable, and as a user tries to input
more then 50 rows, the page performance becomes unbearable. So i thought by adding dataScroller i will be able to cut down on the screen rendering while the user adds more rows and fills them in. However
if you input values and scroll to the next page those values do not get saved. How can i submit these values on scroll action ?

Here is the essence of the page setup

<rich:dataGrid >

 <!-- togglePanel in here and other stuff -->



<rich:dataTable rows="5" >

 <h:inputText />
 <h:inputText />
 <h:inputText />
 <rich:calendar />
 <!-- lot's of input and about 8 columns -->

 <f:facet name="footer">
 <rich:datascroller id="scroller" align="center" renderIfSinglePage="false" />
 </f:facet>

</rich:dataTable>


</rich:dataGrid>

But even more importantly why is JSF in general so slow when you start rendering many input components in a datatable. If anyone knows more about this please share your knowledge.

However at this moment if anyone can share with us if datascroller is appropriate for what i am trying to do, and if it can submit values on the data model while scrolling to the next set of rows.

[ilya_shaikovsky]

in order to store changed values in dataTable while scrolling - use ajaxSingle=false on your scroller.

[martinjozef]

Thank you for the info. That worked !!!

So....... Onto the next hurdle that i encountered once you helped me with value submit on scroll.

If you notice in the jsf snippet i gave earlier, you will see that i have a datagrid that embeds datatable. So for each dataGrid Item i generate a datatable with sub items. Each datatable has it's own datascroller and here is where the new problem begins... When i use the scroller in any of the generated tables
and then transition to another TAB and comeback, all of the datascrollers jump to the position of the last used scroller.

This is bad since some scrollers get position index that is out of bound. and anyway each table should retains it's own position and not synchronize to some one value.

How can i ensure that each datatable rendered on my TAB retains it's own scroll index when moving from tab to tab?
Or at least how to reset every table to come back to position one?

Remember the key here is that datatables get generated dynamical by datagrid iterating a list that itself passes a sub list down to datatable.

All suggestions are greatly appreciated.

[martinjozef]

I have studied all of the API in datatable and datascroller, so far i am not able to figure out the use case i described above. I am working with 3.1.4 GA version of Rich Faces as i cannot update to any later release due to apache myfaces 1.2.3 incompatibilities.

[ilya_shaikovsky]

could you try include to your objects property for storing current page and use "page" attribute on dataScroller mapped to this property.

[martinjozef]

Thanks for the suggestion i will give it a try. I will post my results on the post that i dedicated specially for this problem
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=138104

Anyone interested will be able to find out if it worked there.

[martinjozef]

I posted my response in
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=138104


basically it did not work with the version we use.
For details check the post links on the implementation