Hello,

I have successfully build a matrix using <rich:dataTable>. This matrix has a dynamic number of rows and columns. Each matrix cell has a <rich:inplaceSelect> element with 3 possible values {0, 5, 10}.

Also there are 3 fixed columns per row. First column is the row identification. The last two columns represent a sum of the all the values the user selects with the <rich:inplaceSelect> and an average value calculated from the sum cell divided by the number of dynamic columns.

I need that each time a <rich:inplaceSelect> value changes the sum value and average value for the given row also changes.

The dataTable is defined as bellow:

<rich:dataTable
 value="#{anamanMatrixMB.mechanicSysOutputs}"
 var="mechanic"
 rowKeyVar="rowNumber">
 <f:facet name="header">
 <h:outputText value="#{bundle['matrixTab.title']}" />
 </f:facet>

 <rich:column
 width="50">
 <h:outputText value="#{bundle['matrixLabel.mec']}#{rowNumber+1}"/>
 </rich:column>

 <rich:columns
 value="#{anamanMatrixMB.equipmentOutputs}"
 var="equip"
 index="ind"
 width="50" >
 <f:facet name="header">
 <h:outputText value="#{bundle['matrixLabel.equip']} #{ind+1}" />
 </f:facet>
 <rich:inplaceSelect
 value="#{anamanMatrixMB.selectedCorrValue}"
 selectWidth="50"
 defaultLabel="0" >
 <f:selectItems value="#{anamanMatrixMB.corrValues}" />
 <a4j:support
 event="onchange"
 reRender="rowSum"
 immediate="true" />
 </rich:inplaceSelect>
 </rich:columns>

 <rich:column width="125">
 <f:facet name="header">
 <h:outputText value="#{bundle['matrixTab.sum']}" />
 </f:facet>
 <h:outputText id="rowSum" value="#{anamanMatrixMB.sum}"/>
 </rich:column>

 <rich:column>
 <f:facet name="header">
 <h:outputText value="#{bundle['matrixTab.avg']}" />
 </f:facet>
 <h:outputText value="#{anamanMatrixMB.avg}"/>
 </rich:column>

</rich:dataTable>

What is the best approach to solve this? I figured two ways to do it:
1) try and pass the row and column values to a backing bean valueChangeListener method.
2) insert the <rich:inplaceSelect> component programatically and implement FacesContext()...renderResponse() there.

please advise!

Thanks in advance!
gtludwig