RadioButton row select event in p:datatable - jsf

Question

RadioButton/Checkbox based row selection is a common use case and DataTable provides a solution for this with column selection mode feature.
<p:dataTable var="car" value="#{tableBean.cars}" paginator="true" rows="10"
selection="#{tableBean.selectedCar}">`
<f:facet name="header">
RadioButton Based Selection
</f:facet>
<p:column selectionMode="single" />
<p:column headerText="Model">
<h:outputText value="#{car.model}" />
</p:column>
<p:column headerText="Year">
<h:outputText value="#{car.year}" />
</p:column>
<p:column headerText="Manufacturer">
<h:outputText value="#{car.manufacturer}" />
</p:column>
<f:facet name="footer">
<p:commandButton value="View" image="ui-icon ui-icon-search"
update="displaySingle" oncomplete="singleCarDialog.show()"/>
</f:facet>
</p:dataTable>
I want to know if I choose the first column's radioButton ,how I get a event for this.
Because I want to let a button disabled when choose the first column or the last column's radioButton .
And I also want to get the index of the column when selected the column ,Now I use the selectedCar to compare the list,and get the index of the column. It looks ugly.Anyone can help me ?

Answer 1

This is a solution for PrimeFaces <= 2.x only.
There is a good example at Primeface's showcase. There is an attribute rowSelectListener that can be used like this:
rowSelectListener="#{tableBean.onRowSelect}"
and in the backing bean:
public void onRowSelect(SelectEvent event) {
FacesMessage msg = new FacesMessage("Car Selected",
((Car) event.getObject()).getModel());
FacesContext.getCurrentInstance().addMessage(null, msg);
}