Show-hidden-Posts-Add-on.php

<?php
/*
Plugin Name: Show Hidden Posts Add-on
Plugin URI: http://tiptoppress.com/downloads/term-and-category-based-posts-widget/
Description: Extension to show also hidden Posts ("Wordpress Hide Posts") for the premium widget Term and Category Based Posts Widget.
Author: TipTopPress
Version: 1.0.1
Author URI: http://tiptoppress.com

Installation:
- Download the file and rename it to Show-hidden-Posts-Add-on.php
- Upload it to the plugins folder [your-wordpress-installation]/wp-content/plugins/Order-by-Add-on.php
- Go to WordPress > Admin > PlugIns and activate the Extension
- Now, hidden Posts should be shown just with the widget and not anywhere else
*/

namespace termCategoryPostsPro\ShowHiddenPostsAddOn;

// Don't call the file directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 *  Applied to the list of wp_query args.
 *  
 *  @return array of sort orders
 *  
 *  @since 0.1
 */
function query_args ( $query_args, $that, $instance ) {

	// Custom, Jeff: WordPress Hide Posts
	// override widget filter ('Wordpress Hide Posts') pre_get_posts with prio 20
	add_action( 'pre_get_posts', __NAMESPACE__.'\hidden_posts', 20 );

    return $query_args;
}
add_filter( 'cpwp_query_args', __NAMESPACE__.'\query_args', 10, 3 );





// Custom, Jeff: WordPress Hide Posts
function hidden_posts ( $query_args ) {

	$query_args->set( 'meta_key', '' );
}