private function userEmailOption()
    {
        /** @var WpProQuiz_Model_Email * */
        $email = $this->quiz->getUserEmail();
        $email = $email === null ? WpProQuiz_Model_Email::getDefault(false) : $email;
        $to = $email->getTo();
        ?>
        <div class="postbox" id="userEmailSettings">
            <h3 class="hndle"><?php 
        _e('User e-mail settings', 'wp-pro-quiz');
        ?>
</h3>

            <div class="inside">
                <table class="form-table">
                    <tbody>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('User e-mail notification', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <fieldset>
                                <legend class="screen-reader-text">
                                    <span><?php 
        _e('User e-mail notification', 'wp-pro-quiz');
        ?>
</span>
                                </legend>
                                <label>
                                    <input type="checkbox" name="userEmailNotification"
                                           value="1" <?php 
        $this->checked($this->quiz->isUserEmailNotification());
        ?>
>
                                    <?php 
        _e('Activate', 'wp-pro-quiz');
        ?>
                                </label>

                                <p class="description">
                                    <?php 
        _e('If you enable this option, an email is sent with his quiz result to the user.', 'wp-pro-quiz');
        ?>
                                </p>
                            </fieldset>
                        </td>
                    </tr>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('To:', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <label>
                                <input type="checkbox" name="userEmail[toUser]"
                                       value="1" <?php 
        $this->checked($email->isToUser());
        ?>
>
                                <?php 
        _e('User Email-Address (only registered users)', 'wp-pro-quiz');
        ?>
                            </label><br>
                            <label>
                                <input type="checkbox" name="userEmail[toForm]"
                                       value="1" <?php 
        $this->checked($email->isToForm());
        ?>
>
                                <?php 
        _e('Custom fields', 'wp-pro-quiz');
        ?>
 :
                                <select name="userEmail[to]" class="emailFormVariables"
                                        data-default="<?php 
        echo empty($to) && $to != 0 ? -1 : $email->getTo();
        ?>
"></select>
                                <?php 
        _e('(Type Email)', 'wp-pro-quiz');
        ?>
                            </label>

                        </td>
                    </tr>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('From:', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <label>
                                <input type="text" name="userEmail[from]" value="<?php 
        echo $email->getFrom();
        ?>
"
                                       class="regular-text">
                            </label>
                        </td>
                    </tr>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('Subject:', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <label>
                                <input type="text" name="userEmail[subject]" value="<?php 
        echo $email->getSubject();
        ?>
"
                                       class="regular-text">
                            </label>
                        </td>
                    </tr>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('HTML', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <label>
                                <input type="checkbox" name="userEmail[html]"
                                       value="1" <?php 
        $this->checked($email->isHtml());
        ?>
> <?php 
        _e('Activate', 'wp-pro-quiz');
        ?>
                            </label>
                        </td>
                    </tr>
                    <tr>
                        <th scope="row">
                            <?php 
        _e('Message body:', 'wp-pro-quiz');
        ?>
                        </th>
                        <td>
                            <?php 
        wp_editor($email->getMessage(), 'userEmailEditor', array('textarea_rows' => 20, 'textarea_name' => 'userEmail[message]'));
        ?>

                            <div style="padding-top: 10px;">
                                <table style="width: 100%;">
                                    <thead>
                                    <tr>
                                        <th style="padding: 0;">
                                            <?php 
        _e('Allowed variables', 'wp-pro-quiz');
        ?>
                                        </th>
                                        <th style="padding: 0;">
                                            <?php 
        _e('Custom fields - Variables', 'wp-pro-quiz');
        ?>
                                        </th>
                                    </tr>
                                    </thead>
                                    <tbody>
                                    <tr>
                                        <td style="vertical-align: top;">
                                            <ul>
                                                <li><span>$userId</span> - <?php 
        _e('User-ID', 'wp-pro-quiz');
        ?>
</li>
                                                <li><span>$username</span> - <?php 
        _e('Username', 'wp-pro-quiz');
        ?>
                                                </li>
                                                <li><span>$quizname</span> - <?php 
        _e('Quiz-Name', 'wp-pro-quiz');
        ?>
                                                </li>
                                                <li><span>$result</span> - <?php 
        _e('Result in precent', 'wp-pro-quiz');
        ?>
</li>
                                                <li><span>$points</span> - <?php 
        _e('Reached points', 'wp-pro-quiz');
        ?>
                                                </li>
                                                <li><span>$ip</span> - <?php 
        _e('IP-address of the user', 'wp-pro-quiz');
        ?>
</li>
                                                <li><span>$categories</span> - <?php 
        _e('Category-Overview', 'wp-pro-quiz');
        ?>
</li>
                                            </ul>
                                        </td>
                                        <td style="vertical-align: top;">
                                            <ul class="formVariables"></ul>
                                        </td>
                                    </tr>
                                    </tbody>
                                </table>

                            </div>

                        </td>
                    </tr>
                    </tbody>
                </table>
            </div>
        </div>
        <?php 
    }