kartik-v/yii2-grid — pull request #23 by marciocamello (2014-04-22 16:56:18+00:00)
Title: Change protected function getDataCellValue

public function getDataCellValue($model, $key, $index)
{
$value = parent::getDataCellValue($model, $key, $index);
if ($value !== null) {
return $value ? $this->trueIcon : $this->falseIcon;
}
return $value;
}