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administrator/components/com_fields/src/Field/SectionField.php

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+<?php
+
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  com_fields
+ *
+ * @copyright   (C) 2016 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Component\Fields\Administrator\Field;
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\Form\Field\ListField;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Fields Section
+ *
+ * @since  3.7.0
+ */
+class SectionField extends ListField
+{
+    /**
+     * Type of the field
+     *
+     * @var    string
+     */
+    public $type = 'Section';
+
+    /**
+     * Method to attach a JForm object to the field.
+     *
+     * @param   \SimpleXMLElement  $element  The SimpleXMLElement object representing the `<field>` tag for the form field object.
+     * @param   mixed              $value    The form field value to validate.
+     * @param   string             $group    The field name group control value. This acts as an array container for the field.
+     *                                       For example if the field has name="foo" and the group value is set to "bar" then the
+     *                                       full field name would end up being "bar[foo]".
+     *
+     * @return  boolean  True on success.
+     *
+     * @since   3.7.0
+     */
+    public function setup(\SimpleXMLElement $element, $value, $group = null)
+    {
+        $return = parent::setup($element, $value, $group);
+
+        // Onchange must always be the change context function
+        $this->onchange = 'Joomla.fieldsChangeContext(this.value);';
+
+        return $return;
+    }
+
+    /**
+     * Method to get the field input markup for a generic list.
+     * Use the multiple attribute to enable multiselect.
+     *
+     * @return  string  The field input markup.
+     *
+     * @since   3.7.0
+     */
+    protected function getInput()
+    {
+        Factory::getApplication()->getDocument()->getWebAssetManager()
+            ->useScript('com_fields.admin-field-changecontext');
+
+        return parent::getInput();
+    }
+}