WooCommerce - Custom Shipping Calculator

shipping-calculator.php

<?php
/**
 * Shipping Calculator
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/cart/shipping-calculator.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you (the theme developer).
 * will need to copy the new files to your theme to maintain compatibility. We try to do this.
 * as little as possible, but it does happen. When this occurs the version of the template file will.
 * be bumped and the readme will list any important changes.
 *
 * @see    http://docs.woothemes.com/document/template-structure/
 * @author  WooThemes
 * @package WooCommerce/Templates
 * @version 2.5.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( 'no' === get_option( 'woocommerce_enable_shipping_calc' ) || ! WC()->cart->needs_shipping() ) {
	return;
}

?>

<?php do_action( 'woocommerce_before_shipping_calculator' ); ?>

<form class="woocommerce-shipping-calculator" action="<?php echo esc_url( wc_get_cart_url() ); ?>" method="post">

	<p><a href="#" class="shipping-calculator-button"><?php _e( 'Calculate Shipping', 'woocommerce' ); ?></a></p>

	<section class="shipping-calculator-form" style="display: none;">

		<input type="hidden" name="calc_shipping_country" value="BR" />
		<input type="hidden" name="calc_shipping_state" value="SP" />

		<p class="form-row form-row-wide" id="calc_shipping_postcode_field">
			<input type="text" class="input-text" value="<?php echo esc_attr( WC()->customer->get_shipping_postcode() ); ?>" placeholder="<?php esc_attr_e( 'Postcode / ZIP', 'woocommerce' ); ?>" name="calc_shipping_postcode" id="calc_shipping_postcode" />
		</p>

		<p><button type="submit" name="calc_shipping" value="1" class="button"><?php _e( 'Update Totals', 'woocommerce' ); ?></button></p>

		<?php wp_nonce_field( 'woocommerce-cart' ); ?>
	</section>
</form>

<?php do_action( 'woocommerce_after_shipping_calculator' ); ?>