widget_submenu.php

<?php
/**
 * http://codex.wordpress.org/Function_Reference/wp_register_sidebar_widget
 */
class widget_submenu extends WP_Widget {

  function __construct() {
    parent::__construct(
      'widget_submenu', // Base ID
      __( 'Submenu', 'steinweiler.eu-2015' ), // Name
      array( 'description' => __( 'submenu', 'steinweiler.eu-2015' ), ) // Args
    );
  }

  // Formular für die Widget-Optionen
  public function form( $instance ) {

    $defaults = array(
      'title' => __('Untermenü', 'steinweiler.eu-2015'),
    );

    $instance = wp_parse_args( (array) $instance, $defaults );
    
    $title = esc_attr($instance['title']);

    ?>
    <p>
      <label for="<?php echo $this->get_field_id('title'); ?>">Titel</label>
      <input type="text" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" />
    </p>
    <?php

  }

  // Speichert die Widget-Optionen in der Datenbank
  public function update( $new_instance, $old_instance ) {
    $instance['title'] = strip_tags($new_instance['title']);
    return $new_instance;
  }

  // Ausgabe des Widgets
  public function widget( $args, $instance ) {
    
    extract( $args );

    $title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);
    
    if ( ! empty( $instance['title'] ) ) {
      echo $args['before_title'] . $icon . apply_filters( 'widget_title', $instance['title'] ). $args['after_title'];
    }

    echo $args['before_widget'];
    
    /* Untermenü Seitenleiste
     * http://codex.wordpress.org/Function_Reference/wp_list_pages#List_whole_subpages
     */
    if (!is_search() && !is_404()) :

    if (!$post->post_parent) {
      $ancestor_title = get_post($post);
      $ancestor_title = $ancestor_title->post_title;

      if (DEBUG_STW == 1) :
        debugVar($ancestor_title, '$ancestor_title');
      endif;
    }

    if ($post->ancestors) {
      $ancestor_title = $post->ancestors;
      $ancestor_title = end($ancestor_title);
      $ancestor_title = get_the_title( $ancestor_title );

      if (DEBUG_STW == 1) :
        debugVar($ancestor_title, '$ancestor_title');
      endif;
    }

    if (!$post->post_parent){
      // will display the subpages of this top level page
      $args = array(
        'title_li'     => '',
        'child_of'     => $post->ID,
        'echo'         => 0,
        'sort_column'  => 'post_title'
      );
      $children = wp_list_pages($args);
      debugVar($children);

    } else {

      $ancestors = get_post_ancestors( $post->ID );
      debugVar($ancestors);

      #$ancestors2 = $post->ancestors;
      #debugVar($ancestors2);

      $ancestors = end($ancestors);
      $args = array(
        'title_li'     => '',
        'child_of'     => $ancestors,
        'echo'         => 0,
        'sort_column'  => 'post_title'
      );
      $children = wp_list_pages($args);

      #debugVar($children);

    }

    #debugVar($ancestor_title, "ancestor_title");

    switch ($ancestor_title) {

      case ("Startseite"):
      $icon = "home";
      break;

      case ("Steinweiler"):
      $icon = "star";
      break;

      case ("Leben im Dorf"):
      $icon = "user";
      break;

      case ("Veranstaltungen"):
      $icon = "calendar";
      break;

      case ("Gewerbe"):
      $icon = "road";
      break;

      case ("Verwaltung"):
      $icon = "cog";
      break;

      case ("Links"):
      $icon = "link";
      break;

      case ("archiv"):
      $icon = "search";
      break;

      default:
      $icon = "star";
      break;
    }

    $nav_title = $ancestor_title;
    $nav_title = strtolower($nav_title);
    $nav_title = str_replace(' ', '-', $nav_title);
    #debugVar($nav_title);

    if ($children) { ?>
      <div class="widget nav-sidebar">

        <div class="widget-header">
          <h3><span class="glyphicon glyphicon-<?php echo $icon; ?>" aria-hidden="true"></span> <?php echo $ancestor_title; ?></h3>
        </div>
        <div class="widget-content">
          <ul class="list-group">
            <?php echo $children; ?>
          </ul>
        </div>

      </div> <!-- /widget -->
    <?php
    }
    endif;

    echo $args['after_widget'];
  }
} // /.class widget_submenu

register_widget( 'widget_submenu' );
?>