Post Format Gallery Widget

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The widget only shows this message: “Your theme does not support the Gallery post format. Please add this support so you can choose your posts.”

Yes, that’s it. You have to enable support for the gallery post format on your theme. This plugin will only search for galleries inside a post saved under the post format Gallery.

Can I add / remove / change gallery classes?

Yes. Just use the pfgw_gallery_classes filter in your functions.php file:

/**
 * Add a new class to the gallery container
 *
 * @param array $classes 
 */
function mytheme_change_pfgw_classes( $classes ) {
    $classes[] = 'my-class';
    return $classes;
}
add_filter( 'pfgw_gallery_classes', 'mytheme_change_pfgw_classes' );

Does it only work with posts? What about other post types?

The default type is post. However, you can use pfgw_post_types filter in your functions.php file and then add or remove how many post types you wish. Just remember that your theme must support these post types as well.

/**
 * Add another post type to our gallery query
 *
 * @param array $post_types The post types for the query 
 */
function mytheme_add_post_types( $post_types ) {
    $post_types[] = 'page';
    return $post_types;
}
add_filter( 'pfgw_post_types', 'mytheme_add_post_types' );