CCheckBoxColumn

public function init()
{
    if(isset($this->checkBoxHtmlOptions['name']))
        $name=$this->checkBoxHtmlOptions['name'];
    else
    {
        $name=$this->id;
        if(substr($name,-2)!=='[]')
            $name.='[]';
        $this->checkBoxHtmlOptions['name']=$name;
    }
    $name=strtr($name,array('['=>"\\[",']'=>"\\]"));

    if($this->selectableRows===null)
    {
        if(isset($this->checkBoxHtmlOptions['class']))
            $this->checkBoxHtmlOptions['class'].=' select-on-check';
        else
            $this->checkBoxHtmlOptions['class']='select-on-check';
        return;
    }

    $cball=$cbcode='';
    if($this->selectableRows==0)
    {
        //.. read only
        $cbcode="return false;";
    }
    elseif($this->selectableRows==1)
    {
        //.. only one can be checked, uncheck all other
        $cbcode="$(\"input:not(#\"+this.id+\")[name='$name']\").prop('checked',false);";
    }
    else
    {
        //.. process check/uncheck all
        $cball=<<<CBALL
$('#{$this->id}_all').live('click',function() {
var checked=this.checked;
$("input[name='$name']").each(function() {this.checked=checked;});
});

CBALL;
        $cbcode="$('#{$this->id}_all').prop('checked', $(\"input[name='$name']\").length==$(\"input[name='$name']:checked\").length);";
    }

    $js=$cball;
    $js.=<<<EOD
$("input[name='$name']").live('click', function() {
$cbcode
});
EOD;
    Yii::app()->getClientScript()->registerScript(__CLASS__.'#'.$this->id,$js);
}

protected function renderDataCellContent($row,$data)
{
    if($this->value!==null)
        $value=$this->evaluateExpression($this->value,array('data'=>$data,'row'=>$row));
    else if($this->name!==null)
        $value=CHtml::value($data,$this->name);
    else
        $value=$this->grid->dataProvider->keys[$row];

    $checked = false;
    if($this->checked!==null)
        $checked=$this->evaluateExpression($this->checked,array('data'=>$data,'row'=>$row));

    $options=$this->checkBoxHtmlOptions;
    $name=$options['name'];
    unset($options['name']);
    $options['value']=$value;
    $options['id']=$this->id.'_'.$row;
    echo CHtml::checkBox($name,$checked,$options);
}

protected function renderHeaderCellContent()
{
    if($this->selectableRows===null && $this->grid->selectableRows>1)
        echo CHtml::checkBox($this->id.'_all',false,array('class'=>'select-on-check-all'));
    else if($this->selectableRows>1)
        echo CHtml::checkBox($this->id.'_all',false);
    else
        parent::renderHeaderCellContent();
}