Update DataGrid

[roman.mandeleil1]

Hi

I am looking for a way to update only specific rows in the
data grid. For example: I want to poll keys of rows that changed
to the client side and then to update just rows that should be
updated.

Is there any easy way to do it or I need to implement
a new component for that ?

Thanks in advance

[ilya_shaikovsky]

any rich data Iteration component supports that. You just should point reRender of the poll component to the components iniside iteration component (inside column for table). It will be x-axis. and fill ajaxKeys set with row keys of rows which should be updated. It will be y-axis.

Simplest sample (only cells from the row where request was initiated update) at richfaces-demo. a4j-repeat sample.

[roman.mandeleil1]

Hi Ilya,

Can you please be more specific: for example I have that code
for the data grid, now it polls data for all the data grid.

 <a4j:poll id="poll" interval="500"
 reRender="dataGrid_1" />

 <rich:dataGrid value="#{dataList}"
 var="dataVar" columns="3"
 elements="9" width="80%"
 cellspacing="0" frame="void"
 id="dataGrid_1">
 <rich:panel id="onePanel" >


 <center>
 </f:facet>
 <h:panelGrid columns="3" border="0" style="text-align:left">
 <div/>
 <h:outputText value="#{dataVar.value}" />


 <div/>
 </h:panelGrid>
 </center>

 </rich:panel>
 </rich:dataGrid>

Now let's say I have key for each dataList element, and I will
check what element has changed on the server, how I can
ensure that poll element will refresh only cells that has been
changed ?

Thanks in advance.

[nbelaevski]

http://java.dzone.com/articles/an-introduction-to-jboss-richf?page=1,5&mz=3006-jboss

[roman.mandeleil1]

Sorry guys I think you are missing my point, I don't mean to update
the grid by the user and than to save it to the server side.

I am looking for the option to refresh data on the web page but not
the full data grid but just the cells that changed.

[ilya_shaikovsky]

and we're talking about that.

[roman.mandeleil1]

Thanks, works like magic !!!

[roman.mandeleil1]

One more question: when you update the table in that partial
way which event do you use ? I need to know because I want to attach
highlight effect for the update.

Thank in advance

[ilya_shaikovsky]

not sure that get it. In your case the even of update is just timer.. Or you mean something else?

[roman.mandeleil1]

I mean if you have three lines
in the table and one of it was
updated, how I make it to highlight ?

[ilya_shaikovsky]

you could bind the styleClass on column to iteration variable property and fill with some class dynamically.

[ilya_shaikovsky]

in your case for panel sorry.