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subpages-widget.php
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subpages-widget.php
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<?php
/**
* Plugin Name: Sub-pages Multi-widget
* Description: Show only the sub-pages, if the current page has sub-pages
* Author: Michael Hessling
* Version: 2.0
* Author URI: http://cherrypj.com/
* Changelog:
** Version 2.0:
*** 2013 Michael Hessling (email : [email protected])
*** Converted to WP Multi-widget
** Version 1.1:
*** 2007 Alper Haytabay (email : [email protected])
*** http://wordpress.org/plugins/subpages-widget/
*** Can only be used once site-wide
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* http://justintadlock.com/archives/2009/05/26/the-complete-guide-to-creating-widgets-in-wordpress-28
*/
/**
* Add function to widgets_init that'll load our widget.
* @since 0.1
*/
add_action( 'widgets_init', 'subpages_load_widgets' );
/**
* Register our widget.
*
* @since 0.1
*/
function subpages_load_widgets() {
register_widget( 'Subpages_Widget' );
}
/**
* This class handles everything that needs to be handled with the widget:
* the settings, form, display, and update. Nice!
*
* @since 0.1
*/
class Subpages_Widget extends WP_Widget {
/**
* Widget setup.
*/
function Subpages_Widget() {
/* Widget settings. */
$widget_ops = array( 'classname' => 'subpages', 'description' => __('A widget that display child pages.', 'subpages') );
/* Widget control settings. */
$control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'subpages-widget' );
/* Create the widget. */
$this->WP_Widget( 'subpages-widget', __('Subpages Widget', 'subpages'), $widget_ops, $control_ops );
}
/**
* How to display the widget on the screen.
*/
function widget( $args, $instance ) {
global $post;
extract( $args );
if (is_page()) {
/* Our variables from the widget settings. */
$title = apply_filters('widget_title', $instance['title'] );
$use_root = $instance['use_root'] ? 'true' : 'false';
$only_first = $instance['only_first'] ? 'false' : 'true';
$add_parent = $instance['add_parent'] ? 'true' : 'false';
$root_post = $post;
// find out the root page only when needed
if ($use_root) {
// find the root page and use it
while ($root_post->post_parent != 0) {
$root_post = &get_post($root_post->post_parent);
}
}
// If only the first level should be used set the
// depthStr to the correct value.
// see http://codex.wordpress.org/Template_Tags/wp_list_pages
$depthStr = '';
if ($only_first && !$use_root) {
$depthStr='&depth=1';
}
// the title
$title = $title.$root_post->post_title;
$output = wp_list_pages('sort_column=menu_order'.$depthStr.'&title_li=&echo=0&child_of='.$root_post->ID);
if (!empty($output)) {
/* Before widget (defined by themes). */
echo $before_widget;
/* Display the widget title if one was input
* (before and after defined by themes). */
if ( $title ) {
echo $before_title . '<a href="'.get_permalink($root_post->ID).'">' . $title . '</a>' . $after_title;
}
echo '<ul>';
echo $output;
echo '</ul>';
/* After widget (defined by themes). */
echo $after_widget;
}
}
}
/**
* Update the widget settings.
*/
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
/* Strip tags for title to remove HTML (important for text inputs). */
$instance['title'] = strip_tags( $new_instance['title'] );
/* No need to strip tags for checkboxes. */
$instance['use_root'] = $new_instance['use_root'];
$instance['only_first'] = $new_instance['only_first'];
$instance['add_parent'] = $new_instance['add_parent'];
return $instance;
}
/**
* Displays the widget settings controls on the widget panel.
* Make use of the get_field_id() and get_field_name() function
* when creating your form elements. This handles the confusing stuff.
*/
function form( $instance ) {
/* Set up some default widget settings. */
$defaults = array( 'title' => __('Parent Page Title', 'subpages'), 'use_root' => true, 'only_first' => false, 'add_parent' => true );
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<!-- Widget Title: Text Input -->
<p>
<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title:', 'hybrid'); ?></label>
<input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" style="width:100%;" />
</p>
<!-- Checkboxes -->
<!--p>
<input class="checkbox" type="checkbox" <?php checked( $instance['use_root'], 'on' ); ?> id="<?php echo $this->get_field_id('use_root'); ?>" name="<?php echo $this->get_field_name('use_root'); ?>" />
<label for="<?php echo $this->get_field_id( 'use_root' ); ?>"><?php _e('Use root?', 'subpages'); ?></label>
</p>
<p>
<input class="checkbox" type="checkbox" <?php checked( $instance['only_first'], 'on' ); ?> id="<?php echo $this->get_field_id('only_first'); ?>" name="<?php echo $this->get_field_name('only_first'); ?>" />
<label for="<?php echo $this->get_field_id( 'only_first' ); ?>"><?php _e('Only first level?', 'subpages'); ?></label>
</p>
<p>
<input class="checkbox" type="checkbox" <?php checked( $instance['add_parent'], 'on' ); ?> id="<?php echo $this->get_field_id('add_parent'); ?>" name="<?php echo $this->get_field_name('add_parent'); ?>" />
<label for="<?php echo $this->get_field_id( 'add_parent' ); ?>"><?php _e('Add parent page?', 'subpages'); ?></label>
</p -->
<?php
}
}
?>