radio-taxonomy.php

<?php
/*
Plugin Name: Radio Taxonomy
Plugin URI: http://www.bundy.ca/radio-taxonomy
Description: Make your taxonomies into radio buttons. Easy!
Version: 0.2
Author: Mitchell Bundy
Author URI: http://www.bundy.ca/
*/
/*  Copyright 2008  Mitchell Bundy  (email : mitch@bundy.ca)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    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.  See the
    GNU General Public License for more details.
	
	Links to the author's website should remain where they are and cannot be
	removed without permission from the author.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

include_once('walker.php');

if (!class_exists("RadioTaxonomyMB")) {
class RadioTaxonomyMB {
	
	function __construct() {
		add_action('init', array($this, 'set_taxonomies'));
		add_action('admin_menu', array($this, 'meta_boxes'));
	}
	
	function set_taxonomies() {
		global $wp_taxonomies;
		$this->taxonomies = get_taxonomies(array('show_ui' => 'radio'), 'objects');
		
		// Now that we know which taxonomies we're dealing with, let's set show_ui to true and remove the meta box.
		foreach ($this->taxonomies as $tax) {
			$wp_taxonomies[$tax->name]->show_ui = true;
			// Default show_none to false
			if (!isset($wp_taxonomies[$tax->name]->show_none)) $wp_taxonomies[$tax->name]->show_none = false;
		}
	}
		
	function meta_box($post, $metabox) {
		do_action('radio-taxonomy_box');
		$tax = $metabox['args']['taxonomy'];?>
		<div id="taxonomy-<?php echo $tax->name ?>" class="categorydiv">
            <div class="inside">
                <div id="<?php echo $tax->name; ?>-all">
                    <ul id="<?php echo $tax->name; ?>checklist" class="list:<?php echo $tax->name?> categorychecklist form-no-clear"><?php
                    // show_none set? This doesn't do much but show a radio button
                    // TODO : actually have this checked when no term is selected
                    if ($tax->show_none) {
                        echo '<li><label class="selectit"><input value="" type="radio" name="tax_input['.$tax->name.'][]"'.(apply_filters('radio-taxonomy_none-checked', false, $metabox) ? ' checked="checked"' : '').'> ';
                        echo apply_filters('radio-taxonomy_none-text', __('None', 'radio-taxonomy'), $metabox);
                        echo '</label></li>';
                    }
                    $this->category_radio_list($post->ID, $tax->name);
                    ?>
                    </ul>
                </div>
            </div><?php
		/*if ( current_user_can($tax->cap->edit_terms) ) :
			?><div id="<?php echo $tax->name; ?>-adder" class="wp-hidden-children">
            <h4>
                <a id="<?php echo $tax->name; ?>-add-toggle" href="#<?php echo $tax->name; ?>-add" class="hide-if-no-js" tabindex="3">
                    <?php
                        /* translators: %s: add new taxonomy label *\/
                        printf( __( '+ %s' ), $tax->labels->add_new_item );
                    ?>
                </a>
            </h4>
            <p id="<?php echo $tax->name; ?>-add" class="category-add wp-hidden-child">
                <label class="screen-reader-text" for="new<?php echo $tax->name; ?>"><?php echo $tax->labels->add_new_item; ?></label>
                <input type="text" name="new<?php echo $tax->name; ?>" id="new<?php echo $tax->name; ?>" class="form-required form-input-tip" value="<?php echo esc_attr( $tax->labels->new_item_name ); ?>" tabindex="3" aria-required="true"/>
                <label class="screen-reader-text" for="new<?php echo $tax->name; ?>_parent">
                    <?php echo $tax->labels->parent_item_colon; ?>
                </label>
                <?php //wp_dropdown_categories( array( 'taxonomy' => $tax->name, 'hide_empty' => 0, 'name' => 'new'.$tax->name.'_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;', 'tab_index' => 3 ) ); ?>
                <input type="button" id="<?php echo $tax->name; ?>-add-submit" class="add:<?php echo $tax->name ?>checklist:<?php echo $tax->name ?>-add button category-add-sumbit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" tabindex="3" />
                <?php wp_nonce_field( 'add-'.$tax->name, '_ajax_nonce-add-'.$tax->name, false ); ?>
                <span id="<?php echo $tax->name; ?>-ajax-response"></span>
            </p>
            </div>
            <?php
		endif; */ ?>
        </div>
		<?php
		do_action('radio-taxonomy_box_after');
	}
	
	function category_radio_list($post_id, $taxonomy) {
		wp_terms_checklist($post_id, array('taxonomy' => $taxonomy, 'checked_ontop' => false, 'walker' => new Walker_Category_RadioList));
	}
	
	function meta_boxes() {
		// Remove and create the new meta boxes
		foreach ($this->taxonomies as $tax) {
			foreach ($tax->object_type as $post_type) {
				// Remove the old meta box
				remove_meta_box($tax->name.'div', $post_type, 'side');
				
				// Add the new meta box
				add_meta_box(
					$tax->name.'div', // id of the meta box, use the same as the old one we just removed.
					$tax->labels->singular_name, //title
					array(&$this,'meta_box'), // callback function that will echo the box content
					$post_type, // where to add the box: on "post", "page", or "link" page
					'side',
					'low',
					array('taxonomy' => $tax, 'post_type' => $post_type)
				);
			}
		}
	}
}
new RadioTaxonomyMB;
}
?>