Adds a custom WDCC Post Type and it's respective taxonomies and the wdcc-setup and wdcc-entries for Meta Boxes.

wdcc-entries.php

<?php

// =============================================================================
// FUNCTIONS/GLOBAL/ADMIN/META/ENTRIES.PHP
// -----------------------------------------------------------------------------
// Registers the meta boxes for pages, posts, and portfolio items.
// =============================================================================

// =============================================================================
// TABLE OF CONTENTS
// -----------------------------------------------------------------------------
//   01. WDCC Items
// =============================================================================

// WDCC Items
// =============================================================================

function x_add_wdcc_item_meta_boxes() {

	$meta_box = array(
		'id'			=> 'wdcc-meta-box-winkel-prijs',
		'title'			=> __('Te Koop op', '__wdcc__'),
		'description'	=> __('Voeg een winkel en prijs toe', '__wdcc__'),
		'page'			=> 'wdcc',
		'context'		=> 'normal',
		'priority'		=> 'high',
		'fields'		=> array(
			array(
				'name'	=> __('Winkel', '__wdcc__'),
				'desc'	=> __('Kies een winkel', '__wdcc__'),
				'id'	=> '_wdcc_winkel_keuze',
				'type'	=> 'wdcc-winkels',
				'std'	=> '',
			),
		),
	);

	wdcc_add_meta_box($meta_box);
}

add_action('add_meta_boxes', 'x_add_wdcc_item_meta_boxes');

wdcc-post-types.php

<?php

// =============================================================================
// INC/POST-TYPES/WDCC-POST-TYPE.PHP
// -----------------------------------------------------------------------------
// Sets up custom post types for WDCC Figures.
// =============================================================================

// =============================================================================
// TABLE OF CONTENTS
// -----------------------------------------------------------------------------
//   01. WDCC Custom Post Type
//   02. Add Thumbnails to the Admin Screen
// =============================================================================

// WDCC Custom Post Type
// =============================================================================

function wdcc_type_init() {

  $slug      = 'wdcc';
  $menu_icon = ( floatval( get_bloginfo( 'version' ) ) >= '3.8' ) ? get_stylesheet_directory_uri() . '/assets/img/admin/wdcc-icon.png' : NULL;


  //
  // Enable the custom post type.
  //

  $labels = array(
    'name'               => __( 'WDCC', '__wdcc__' ),
    'singular_name'      => __( 'WDCC Item', '__wdcc__' ),
    'add_new'            => __( 'Add New Item', '__wdcc__' ),
    'add_new_item'       => __( 'Add New WDCC Item', '__wdcc__' ),
    'edit_item'          => __( 'Edit WDCC Item', '__wdcc__' ),
    'new_item'           => __( 'Add New WDCC Item', '__wdcc__' ),
    'view_item'          => __( 'View Item', '__wdcc__' ),
    'search_items'       => __( 'Search WDCC', '__wdcc__' ),
    'not_found'          => __( 'No wdcc items found', '__wdcc__' ),
    'not_found_in_trash' => __( 'No wdcc items found in trash', '__wdcc__' )
  );

  $args = array(
    'labels'          => $labels,
    'public'          => true,
    'show_ui'         => true,
    'supports'        => array( 'title', 'editor', 'excerpt', 'thumbnail', 'comments', 'author', 'custom-fields', 'revisions' ),
    'capability_type' => 'post',
    'hierarchical'    => false,
    'rewrite'         => array( 'slug' => $slug, 'with_front' => false ),
    'menu_position'   => 5,
    'menu_icon'       => $menu_icon,
    'has_archive'     => true
  );

  $args = apply_filters( 'wdcc_args', $args );

  register_post_type( 'wdcc', $args );

}

add_action( 'init', 'wdcc_type_init' );

function wdcc_taxonomies_init() {
	$taxonomies = array(
		array(
			'slug'         => 'wdcc-series',
			'single_name'  => 'Serie',
			'plural_name'  => 'Series',
			'post_type'    => 'wdcc',
			'has_ui'	   => true,
			'hierarchical' => true,
		),
		array(
			'slug'         => 'wdcc-editions',
			'single_name'  => 'Edition',
			'plural_name'  => 'Editions',
			'post_type'    => 'wdcc',
			'has_ui'	   => true,
			'hierarchical' => true,
		),
		array(
			'slug'		   => 'wdcc-winkels',
			'single_name'  => 'Winkel',
			'plural_name'  => 'Winkels',
			'post_type'	   => 'wdcc',
			'has_ui'	   => true,
			'hierarchical' => false,
		),
	);

	foreach( $taxonomies as $taxonomy ) {
		$labels = array(
			'name' => $taxonomy['plural_name'],
			'singular_name' => $taxonomy['single_name'],
			'search_items' =>  'Search ' . $taxonomy['plural_name'],
			'all_items' => 'All ' . $taxonomy['plural_name'],
			'parent_item' => 'Parent ' . $taxonomy['single_name'],
			'parent_item_colon' => 'Parent ' . $taxonomy['single_name'] . ':',
			'edit_item' => 'Edit ' . $taxonomy['single_name'],
			'update_item' => 'Update ' . $taxonomy['single_name'],
			'add_new_item' => 'Add New ' . $taxonomy['single_name'],
			'new_item_name' => 'New ' . $taxonomy['single_name'] . ' Name',
			'menu_name' => $taxonomy['plural_name'],
		);

		$rewrite = isset( $taxonomy['rewrite'] ) ? $taxonomy['rewrite'] : array( 'slug' => $taxonomy['slug'] );
		$hierarchical = isset( $taxonomy['hierarchical'] ) ? $taxonomy['hierarchical'] : false;

		register_taxonomy( $taxonomy['slug'], $taxonomy['post_type'], array(
			'hierarchical' => $hierarchical,
			'labels' => $labels,
			'show_ui' => $taxonomy['has_ui'],
			'query_var' => true,
			'rewrite' => $rewrite,
		));
	}
}

add_action('init', 'wdcc_taxonomies_init');

// Add Thumbnails to the Admin Screen
// =============================================================================

function wdcc_add_thumbnail_column( $columns ) {
  $thumb   = array( 'thumb' => __( 'Thumbnail', '__wdcc__' ) );
  $columns = array_slice( $columns, 0, 2 ) + $thumb + array_slice( $columns, 1 );
  return $columns;
}

function wdcc_add_thumbnail_column_content( $column ) {
  if ( $column == 'thumb' ) {
    echo '<a href="' . get_edit_post_link() . '">' . get_the_post_thumbnail( get_the_ID(), array( 200, 200 ) ) . '</a>';
  }
}

add_filter( 'manage_wdcc_posts_columns', 'wdcc_add_thumbnail_column', 10, 1 );
add_action( 'manage_wdcc_posts_custom_column', 'wdcc_add_thumbnail_column_content', 10, 1 );

wdcc-setup.php

<?php

// =============================================================================
// FUNCTIONS/GLOBAL/ADMIN/META/WDCC-SETUP.PHP
// -----------------------------------------------------------------------------
// Sets up custom meta boxes utilized throughout the theme in various areas.
// =============================================================================

// =============================================================================
// TABLE OF CONTENTS
// -----------------------------------------------------------------------------
//	 01. Set Paths
//	 02. Add WDCC Meta
//	 03. Create Meta Entries
// 	 04. Save Meta Entries
//   05. Include Entry and Taxonomy Meta Box Setup
// =============================================================================

// Set Paths
// =============================================================================

$child_meta_path = get_stylesheet_directory() . '/framework/functions/global/admin/meta';

// Add WDCC Meta
// =============================================================================

function wdcc_add_meta_box($meta_box) {
	if (!is_array($meta_box)) {
		return false;
	}

	$callback = create_function('$post,$meta_box', 'wdcc_create_meta_box($post, $meta_box["args"]);');

	add_meta_box($meta_box['id'], $meta_box['title'], $callback, $meta_box['page'], $meta_box['context'], $meta_box['priority'], $meta_box );
}

// Create Meta Entries
// =============================================================================

function wdcc_create_meta_box($post, $meta_box) {
	if (!is_array($meta_box)) {
		return false;
	}

	if (isset($meta_box['description']) && $meta_box['description'] != '') {
		echo '<p>' . $meta_box['description'] . '</p>';
	}

	wp_nonce_field(basename(__FILE__), 'x_meta_box_nonce');

	echo '<table class="form-table x-form-table">';

	foreach ($meta_box['fields'] as $field) {

		$meta = ($post->post_status == 'auto-draft') ? $field['id'] : get_post_meta($post->ID, $field['id'], true);

		echo '<tr><th><label for="' . $field['id'] . '"><strong>' . $field['name'] .'</strong>
			<span>' . $field['desc'] . '</span></label></th>';

		switch ($field['type']) {
			case 'wdcc-winkels':
				$winkels 	= get_terms('wdcc-winkels');
				$meta 		= ($meta == '') ? array(0 => 'Alle Winkels') : $meta;

				echo 	'<table id="winkelsTable" class="display" cellspacing="0" width="100%">
							<thead>
								<tr>
									<th>Store</th>
									<th>Price</th>
								</tr>
							</thead>
							<tfoot>
								<tr>
									<th>Store</th>
									<th>Price</th>
								</tr>
							</tfoot>
							<tbody></tbody>
						</table>';


				echo '<td><select name="x_meta[' . $field['id'] . '][]" id="' . $field['id'] . '">';
				echo '<option value="Alle Winkels" ' . selected($meta[0], 'Alle Winkels', true) . '>Alle Winkels</option>';
				foreach ($winkels as $winkel) {
					echo '<option value="' . $winkel->name . '"';
					if (in_array($winkel->term_id, $meta)) echo ' selected="selected"';
					echo '>' . $winkel->name . '</option>';
				}
				echo '</select></td>';
				echo '<input id="prijsText" type="text" value="" placeholder="price" />';
				echo '<a href="#" id="addWinkel">+ Add Store Price</a>';
				?>
				<script>
					jQuery(document).ready(function($) {
						var t = jQuery('#winkelsTable').DataTable({
							"searching": false,
							"paging": false,
						});

						jQuery('#addWinkel').on('click', function(e) {
							e.preventDefault();

							var store = $('#<?php echo $field["id"] ?>').val();
							var price = $('#prijsText').val();

							t.row.add([
								store,
								price,
							]).draw(false);
						});
					});
				</script>
				<?php
			break;

			default :
				do_action( 'x_add_meta_box_field_type', $field['type'] );
			break;
		}
		echo '</tr>';
	}
	echo '</table>';
}

// Save Meta Entries
// =============================================================================

function wdcc_save_meta_box($post_id) {
	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
    	return;
    }

    if (!isset($_POST['x_meta']) || !isset($_POST['x_meta_box_nonce']) || !wp_verify_nonce($_POST['x_meta_box_nonce'], basename(__FILE__))) {
    	return;
    }

    if ('page' == $_POST['post_type']) {
    	if (!current_user_can('edit_page', $post_id)) return;
    } else {
    	if (!current_user_can('edit_post', $post_id)) return;
    }

    foreach( $_POST['x_meta'] as $key => $val ) {
    	if ( is_array( $val ) ) {
      		update_post_meta( $post_id, $key, $val );
    	} else {
      		update_post_meta( $post_id, $key, stripslashes( htmlspecialchars( $val ) ) );
    	}
  	}
}

add_action('save_post', 'wdcc_save_meta_box');

// Include Entry and Taxonomy Meta Box Setup
// =============================================================================

require_once( $child_meta_path . '/wdcc-entries.php');