<?php
/**
 *
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Catalog\Controller\Adminhtml\Category\Widget;

class Chooser extends \Magento\Catalog\Controller\Adminhtml\Category\Widget
{
    /**
     * @var \Magento\Framework\Controller\Result\RawFactory
     */
    protected $resultRawFactory;

    /**
     * @param \Magento\Backend\App\Action\Context $context
     * @param \Magento\Framework\View\LayoutFactory $layoutFactory
     * @param \Magento\Framework\Controller\Result\RawFactory $resultRawFactory
     */
    public function __construct(
        \Magento\Backend\App\Action\Context $context,
        \Magento\Framework\View\LayoutFactory $layoutFactory,
        \Magento\Framework\Controller\Result\RawFactory $resultRawFactory
    ) {
        parent::__construct($context, $layoutFactory);
        $this->resultRawFactory = $resultRawFactory;
    }

    /**
     * Chooser Source action
     *
     * @return \Magento\Framework\Controller\Result\Raw
     */
    public function execute()
    {
        /** @var \Magento\Framework\Controller\Result\Raw $resultRaw */
        $resultRaw = $this->resultRawFactory->create();
        return $resultRaw->setContents($this->_getCategoryTreeBlock()->toHtml());
    }
}
