Vafpress Post Formats UI Adding New Field (https://github.com/vafour/vafpress-post-formats-ui)

WP Post Formats Adding New Field

// add new field under gallery post format forms ui
add_action( 'vp_pfui_after_gallery_meta', 'mytheme_add_gallery_type_field' );

// handle the saving of our new field
add_action( 'admin_init'                , 'mytheme_admin_init' );

function mytheme_admin_init() {
	$post_formats = get_theme_support('post-formats');
	if (!empty($post_formats[0]) && is_array($post_formats[0])) {
		if (in_array('gallery', $post_formats[0])) {
			add_action('save_post', 'mytheme_format_gallery_save_post');
		}
	}
}

function mytheme_add_gallery_type_field() {
	global $post;
	$type = get_post_meta($post->ID, '_format_gallery_type', true);
	?>
	<div class="vp-pfui-elm-block">
		<label for="vp-pfui-format-gallery-type"><?php _e('Gallery Type', 'my-theme'); ?></label>

		<!-- Radio Button Sample -->
		<input type="radio" name="_format_gallery_type" value="option1" id="option1" <?php checked( $type, "option1" ); ?>><label style="display: inline-block;" for="option1">Option 1</label>
		<input type="radio" name="_format_gallery_type" value="option2" id="option2" <?php checked( $type, "option2" ); ?>><label style="display: inline-block;" for="option2">Option 2</label>
		<input type="radio" name="_format_gallery_type" value="option3" id="option3" <?php checked( $type, "option3" ); ?>><label style="display: inline-block;" for="option3">Option 3</label>

		<!-- Select Box Sample -->
 		<!-- <select name="_format_gallery_type" id="vp-pfui-format-gallery-type">
			<option value="option1" <?php selected( $type, "option1" ); ?>>Option 1</option>
			<option value="option2" <?php selected( $type, "option2" ); ?>>Option 2</option>
			<option value="option3" <?php selected( $type, "option3" ); ?>>Option 3</option>
		</select> -->

		<!-- Text Box Sample -->
		<!-- <input type="text" name="_format_gallery_type" value="<?php echo esc_attr(get_post_meta($post->ID, '_format_gallery_type', true)); ?>" id="vp-pfui-format-gallery-type" tabindex="1" /> -->
	</div>
	<?php
}

function mytheme_format_gallery_save_post($post_id) {
	if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
		return;
	}
	if (!defined('XMLRPC_REQUEST') && isset($_POST['_format_gallery_type'])) {
		update_post_meta($post_id, '_format_gallery_type', $_POST['_format_gallery_type']);
	}
}