Validating groups of components

i have validator, purposeis check @ least 1 check box in group selected

my question can set listener group or red focus ring appears around related components

 

i can set listener 1 of check boxes , red focus ring appears  when group  don't focus ring

( error tip displayed when user  mouses on though)

 

<validators:daysvalidator id="daysval" source="{daysmodel}" property="days" listener="{daysgroup}"/>

..

 

                <s:group id="daysgroup" height="30" width="155"
                         includein="ondaysstate">
                    <s:layout>
                        <s:horizontallayout gap="6" paddingleft="2"/>
                    </s:layout>
                   
                    <s:checkbox id="moncheckbox" skinclass="skins.dayscheckboxskin" label="m"/>
                    <s:checkbox id="tuecheckbox" skinclass="skins.dayscheckboxskin" label="t"/>
                    <s:checkbox id="wedcheckbox" skinclass="skins.dayscheckboxskin" label="w"/>
                    <s:checkbox id="thucheckbox" skinclass="skins.dayscheckboxskin" label="t"/>
                    <s:checkbox id="fricheckbox" skinclass="skins.dayscheckboxskin" label="f"/>
                    <s:checkbox id="satcheckbox" skinclass="skins.dayscheckboxskin" label="s"/>
                    <s:checkbox id="suncheckbox" skinclass="skins.dayscheckboxskin" label="s"/>
                </s:group>

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