TbGroupButtonColumn.php

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<?php
Yii::import('zii.widgets.grid.CButtonColumn');

class TbGroupButtonColumn extends CButtonColumn
{
        protected function renderButton($id, $button, $row, $data)
        {
                if (isset($button['visible']) && !$this->evaluateExpression(
                        $button['visible'],
                        array('row' => $row, 'data' => $data)
                )
                ) {
                        return;
                }

                $label = isset($button['label']) ? $button['label'] : $id;
                $url = isset($button['url']) ? $this->evaluateExpression($button['url'], array('data' => $data, 'row' => $row))
                        : '#';
                $options = isset($button['options']) ? $button['options'] : array();

                if (!isset($options['title'])) {
                        $options['title'] = $label;
                }

                //Forsing btn class
                if (!isset($options['class'])) {
                        $options['class'] = 'btn';
                } else if (!preg_match('/[^A-z\-]btn[^A-z\-]/', $options['class'])) {
                        $options['class'] = 'btn ' . $options['class'];
                }

                if (isset($button['icon'])) {
                        if (strpos($button['icon'], 'icon') === false && strpos($button['icon'], 'fa') === false) {
                                $button['icon'] = 'icon-' . implode(' icon-', explode(' ', $button['icon']));
                        }

                        echo CHtml::link('<i class="' . $button['icon'] . '"></i>', $url, $options);
                } else {
                        echo CHtml::link($label, $url, $options);
                }
        }

        protected function renderDataCellContent($row, $data)
        {
                $tr = array();
                ob_start();
                foreach ($this->buttons as $id => $button) {
                        $this->renderButton($id, $button, $row, $data);
                        $tr['{' . $id . '}'] = ob_get_contents();
                        ob_clean();
                }

                ob_end_clean();
                echo '<div class="btn-group">';
                echo strtr($this->template, $tr);
                echo '</div>';
        }
}