Add Buttons to WooCommerce Edit Order screen

gistfile1.php

<?php

  	add_action('woocommerce_order_actions', array( $this, 'my_order_actions' ));
	add_action('woocommerce_process_shop_order_meta', array( $this, 'my_process_order_meta'), 20, 2 );


  	function my_order_actions( $post_id ) {
		?>
		<li class="wide"><input type="submit" class="button tips" name="my_button" value="<?php _e('Do Something', 'woocommerce'); ?>" data-tip="<?php _e('Put tip here.', 'woocommerce'); ?>" /></li>
		<?php
	}

  	function my_process_order_meta( $post_id, $post) {
		global $woocommerce, $woocommerce_errors;
		$order = new WC_Order( $post_id );

		if ( isset( $_POST['my_button'] ) && $_POST['my_button'] ) {
        		//  Do something...
		} 
	}