false, ); /** * Default widgets. * * @var array; */ protected $widgets = array( 'nav_menu', ); /** * Construct. * * @var array; */ public function __construct() { // Hook in all the right places. add_action( 'in_widget_form', array( $this, 'add_settings' ), 10, 3 ); add_filter( 'widget_update_callback', array( $this, 'save_settings' ), 10, 4 ); add_filter( 'widget_nav_menu_args', array( $this, 'frontend_settings' ), 10, 4 ); } /** * Adds the custom settings to all widgets' forms. * * @param WP_Widget $widget An instance of a WP_Widget derived subclass. * @param mixed $return Return null if new fields are added. * @param array $instance An array of the widget's settings. */ public function add_settings( $widget, $return, $instance ) { if ( ! $this->is_supported( $widget ) ) { return null; } // Make sure $instance contains at least our default values. $instance = wp_parse_args( $instance, $this->defaults ); ?>

is_supported( $widget ) ) { return $instance; } // Make sure $instance contains at least our default values. $instance = wp_parse_args( $instance, $this->defaults ); // Now check that a value is actually present, and assign it sanitized. if ( isset( $new_instance['collapse'] ) ) { $instance['collapse'] = ! empty( $new_instance['collapse'] ) ? 1 : 0; } return $instance; } /** * Filters the arguments for the Navigation Menu widget. * * @since 4.2.0 * @since 4.4.0 Added the `$instance` parameter. * * @param array $nav_menu_args { * An array of arguments passed to wp_nav_menu() to retrieve a navigation menu. * * @type callable|bool $fallback_cb Callback to fire if the menu doesn't exist. Default empty. * @type mixed $menu Menu ID, slug, or name. * } * @param WP_Term $nav_menu Nav menu object for the current menu. * @param array $args Display arguments for the current widget. * @param array $instance Array of settings for the current widget. */ public function frontend_settings( $nav_menu_args, $nav_menu, $args, $instance ) { if ( isset( $instance['collapse'] ) && $instance['collapse'] ) { $nav_menu_args['show_toggles'] = true; $nav_menu_args['container_class'] = 'collapse-sub-navigation'; $nav_menu_args['menu_class'] = 'menu has-collapse-sub-nav'; if ( ! isset( $nav_menu_args['menu_id'] ) && isset( $args['widget_id'] ) ) { $nav_menu_args['menu_id'] = 'menu-' . $args['widget_id']; } } return $nav_menu_args; } /** * Checks to make sure this is only for nav widget. * * @param WP_Widget $widget The current widget instance. * * @return bool if the right widget. */ protected function is_supported( $widget ) { if ( in_array( $widget->id_base, $this->widgets, true ) ) { return true; } return false; } } new Nav_Widget_Settings();