Primefaces update table after on-cell editing - jsf

Question

I have a data table with on-cell editing feature, and I want to update the data table to show the modified record by apply them a different style class.
Here are my problems:
If i do not update the data table when the onCellEdit event fires, records are correctly updated, but I cannot see the applyed style class for modified rows.
If I update the data table when the onCellEdit event fires and use the return key to update a value, all works fine, and I can see the applied style class for modified rows.
If I update the data table when the on-cell edit event fires and use the mouse clic to update a value (clicking on another row or on another cell within the same row), only the first value is updated correctly; when trying to update other values, the onCellEdit event triggers before I can insert the new value, so the event triggers with newValue=oldValue, for all the subsequent changes.
The xhtml page:
<h:form id="frm_tbl_riv">
<p:dataTable id="tbl_rilevazioni" var="rilevazione"
value="#{rilevazioni.rilevazioni}" widgetVar="tbl_rilevazioni_id"
editable="true" editMode="cell" scrollable="true" scrollHeight="350"
rowKey="#{rilevazione.idRilevazione}" selectionMode="single"
selection="#{rilevazioni.selezionata}">
<p:ajax event="rowSelect"
update=":tView:frm_tbl_riv:popup_rilevazioni" />
<p:ajax event="cellEdit" listener="#{rilevazioni.onCellEdit}"
update=":tView:frm_btn_riv" />
<!-- update=":frm_btn_riv :frm_tbl_riv" -->
<p:ajax event="contextMenu"
listener="#{rilevazioni.onRilevazioneSelezionata}"
update="#this" />
<p:column headerText="#{msg['rilevazione']}" width="130">
<f:facet name="header">
<h:outputText value="#{msg['rilevazione']}" />
</f:facet>
<h:outputText value="#{rilevazione.descRilevazione}" id="descRil" />
</p:column>
<p:column headerText="#{msg['valore']}"
styleClass="#{rilevazioni.isModificata(rilevazione) ? 'modificata' : ''}"
width="30">
<h:outputText value="#{rilevazione.valore}"
rendered="#{!rilevazioni.isModificabile(rilevazione)}" />
<p:cellEditor
rendered="#{rilevazioni.isModificabile(rilevazione)}">
<f:facet name="output">
<h:outputText value="#{rilevazione.valore}" />
</f:facet>
<f:facet name="input">
<p:inputText value="#{rilevazione.valore}"
label="#{msg['valore']}">
</f:facet>
</p:cellEditor>
</p:column>
</p:dataTable>
</h:form>
And the managed bean (view scoped):
#ManagedBean(name = "rilevazioni")
#ViewScoped
public class GestioneRilevazioniBean implements Serializable
{
// ...
public void onCellEdit(CellEditEvent event)
{
FacesContext context = FacesContext.getCurrentInstance();
FacesMessage msg = null;
Object nuovoValore = event.getNewValue();
Object vecchioValore = event.getOldValue();
int i = event.getRowIndex();
RilevazioneGiornaliera r = rilevazioni.get(i);
r.setIdUtente(userBean.getUserId());
if (!nuovoValore.equals(vecchioValore))
{
try
{
RilevazioniService.getInstance().updateRilevazioneGiornaliera(r);
modificate.add(r);
} catch (Throwable ex)
{
// ...
}
}
}
public boolean isModificata(RilevazioneGiornaliera riv)
{
return modificate.contains(riv);
}
public boolean isModificabile(RilevazioneGiornaliera rilevazione)
{
// some logic
return true;
}
}
If I use:
update=":frm_btn_riv :frm_tbl_riv"
for the on-cell edit event, I obtain the behaviour specified on point 2 and 3. The same with #form or #parent.

Answer 1

I have founded a solution to update the style class to the modified cell after the onCellEdit event fires.
Data table:
<p:ajax event="cellEdit" listener="#{rilevazioni.onCellEdit}"
oncomplete="handleRilevazioniCellEdit(xhr, status, args);" />
// ...
// within the cell editor
<p:inputText id="rilevazioniCellEditInputtext" value="#{rilevazione.valore}"
label="#{msg['valore']}" />
Javascript:
<script>
function handleRilevazioniCellEdit(xhr, status, args)
{
var modelInput = $('#parentId:' + args.rowIndex + '\\:rilevazioniCellEditInputtext');
var cell = modelInput.parent().parent().parent();
cell.addClass('modificata');
}
</script>
Managed bean, at the end of the onCellEdit() event:
RequestContext requestContext = RequestContext.getCurrentInstance();
requestContext.addCallbackParam("rowIndex", event.getRowIndex());