ButtonGroup.php

<?php

namespace iutbay\yii2bootstrap;

use yii\helpers\ArrayHelper;
use yii\helpers\Html;

/**
 * ButtonGroup widget
 * @author Kevin LEVRON <kevin.levron@gmail.com>
 */
class ButtonGroup extends \yii\bootstrap\ButtonGroup
{

    /**
     * Button group size
     * @var string
     */
    public $size;

    /**
     * Buttons type
     * @var string
     */
    public $type;

    /**
     * @inheritdoc
     */
    public function init()
    {
        parent::init();
        if (!empty($this->size)) {
            Html::addCssClass($this->options, 'btn-group-' . $this->size);
        }
    }

    /**
     * Generates the buttons that compound the group as specified on [[buttons]].
     * @return string the rendering result.
     */
    protected function renderButtons()
    {
        $buttons = [];
        foreach ($this->buttons as $button) {
            if (is_array($button)) {
                $visible = ArrayHelper::remove($button, 'visible', true);
                if ($visible === false) {
                    continue;
                }

                $button['view'] = $this->getView();
                if (!isset($button['encodeLabel'])) {
                    $button['encodeLabel'] = $this->encodeLabels;
                }

                if (!empty($this->type) && !isset($button['type'])) $button['type'] = $this->type;

                $buttons[] = Button::widget($button);
            } else {
                $buttons[] = $button;
            }
        }

        return implode("\n", $buttons);
    }

}