__( 'Add a navigation menu to your sidebar.' ),
'customize_selective_refresh' => true,
);
parent::__construct( 'nav_menu', __('Navigation Menu'), $widget_ops );
}
/**
* Outputs the content for the current Navigation Menu widget instance.
*
* @since 3.0.0
*
* @param array $args Display arguments including 'before_title', 'after_title',
* 'before_widget', and 'after_widget'.
* @param array $instance Settings for the current Navigation Menu widget instance.
*/
public function widget( $args, $instance ) {
// Get menu
$nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false;
if ( ! $nav_menu ) {
return;
}
$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
echo $args['before_widget'];
if ( $title ) {
echo $args['before_title'] . $title . $args['after_title'];
}
$nav_menu_args = array(
'fallback_cb' => '',
'menu' => $nav_menu
);
/**
* Filters the arguments for the Navigation Menu widget.
*
* @since 4.2.0
* @since 4.4.0 Added the `$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.
*/
wp_nav_menu( apply_filters( 'widget_nav_menu_args', $nav_menu_args, $nav_menu, $args, $instance ) );
echo $args['after_widget'];
}
/**
* Handles updating settings for the current Navigation Menu widget instance.
*
* @since 3.0.0
*
* @param array $new_instance New settings for this instance as input by the user via
* WP_Widget::form().
* @param array $old_instance Old settings for this instance.
* @return array Updated settings to save.
*/
public function update( $new_instance, $old_instance ) {
$instance = array();
if ( ! empty( $new_instance['title'] ) ) {
$instance['title'] = sanitize_text_field( $new_instance['title'] );
}
if ( ! empty( $new_instance['nav_menu'] ) ) {
$instance['nav_menu'] = (int) $new_instance['nav_menu'];
}
return $instance;
}
/**
* Outputs the settings form for the Navigation Menu widget.
*
* @since 3.0.0
*
* @param array $instance Current settings.
* @global WP_Customize_Manager $wp_customize
*/
public function form( $instance ) {
global $wp_customize;
$title = isset( $instance['title'] ) ? $instance['title'] : '';
$nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';
// Get menus
$menus = wp_get_nav_menus();
$empty_menus_style = $not_empty_menus_style = '';
if ( empty( $menus ) ) {
$empty_menus_style = ' style="display:none" ';
} else {
$not_empty_menus_style = ' style="display:none" ';
}
$nav_menu_style = '';
if ( ! $nav_menu ) {
$nav_menu_style = 'display: none;';
}
// If no menus exists, direct the user to go and create some.
?>