woocommerce/widgets/widget-product_categories.php

<?php
/**
 * Product Search Widget
 * 
 * @package		WooCommerce
 * @category	Widgets
 * @author		WooThemes
 */
 
class WooCommerce_Widget_Product_Categories extends WP_Widget {

	/** constructor */
	function WooCommerce_Widget_Product_Categories() {
		$widget_ops = array( 'classname' => 'widget_product_categories', 'description' => __( "A list or dropdown of product categories", 'woothemes' ) );
		parent::WP_Widget('product_categories', __('WooCommerce Product Categories', 'woothemes'), $widget_ops);
	}

	/** @see WP_Widget::widget */
	function widget( $args, $instance ) {
		extract( $args );

		$title = apply_filters('widget_title', empty( $instance['title'] ) ? __( 'Product Categories', 'woothemes' ) : $instance['title'], $instance, $this->id_base);
		$c = $instance['count'] ? '1' : '0';
		$h = $instance['hierarchical'] ? '1' : '0';
		$d = $instance['dropdown'] ? '1' : '0';

		echo $before_widget;
		if ( $title )
			echo $before_title . $title . $after_title;

		$cat_args = array('orderby' => 'name', 'show_count' => $c, 'hierarchical' => $h, 'taxonomy' => 'product_cat');

		if ( $d ) {

			$terms = get_terms('product_cat');
			$output = "<select name='product_cat' id='dropdown_product_cat'>";
			$output .= '<option value="">'.__('Select Category', 'woothemes').'</option>';
			foreach($terms as $term){
				$root_url = get_bloginfo('url');
				$term_taxonomy=$term->taxonomy;
				$term_slug=$term->slug;
				$term_name =$term->name;
				$link = $term_slug;
				$output .="<option value='".$link."'>".$term_name."</option>";
			}
			$output .="</select>";
			echo $output;
			
			?>
			<script type='text/javascript'>
			/* <![CDATA[ */
				var dropdown = document.getElementById("dropdown_product_cat");
				function onCatChange() {
					if ( dropdown.options[dropdown.selectedIndex].value !=='' ) {
						location.href = "<?php echo home_url(); ?>/?product_cat="+dropdown.options[dropdown.selectedIndex].value;
					}
				}
				dropdown.onchange = onCatChange;
			/* ]]> */
			</script>
			<?php
			
		} else {
?>
		<ul>
<?php
		$cat_args['title_li'] = '';
		wp_list_categories(apply_filters('widget_product_categories_args', $cat_args));
?>
		</ul>
<?php
		}

		echo $after_widget;
	}

	/** @see WP_Widget::update */
	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;
		$instance['title'] = strip_tags($new_instance['title']);
		$instance['count'] = !empty($new_instance['count']) ? 1 : 0;
		$instance['hierarchical'] = !empty($new_instance['hierarchical']) ? 1 : 0;
		$instance['dropdown'] = !empty($new_instance['dropdown']) ? 1 : 0;

		return $instance;
	}
	
	/** @see WP_Widget::form */
	function form( $instance ) {
		//Defaults
		$instance = wp_parse_args( (array) $instance, array( 'title' => '') );
		$title = esc_attr( $instance['title'] );
		$count = isset($instance['count']) ? (bool) $instance['count'] :false;
		$hierarchical = isset( $instance['hierarchical'] ) ? (bool) $instance['hierarchical'] : false;
		$dropdown = isset( $instance['dropdown'] ) ? (bool) $instance['dropdown'] : false;
?>
		<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e( 'Title:', 'woothemes' ); ?></label>
		<input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" /></p>

		<p><input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('dropdown'); ?>" name="<?php echo $this->get_field_name('dropdown'); ?>"<?php checked( $dropdown ); ?> />
		<label for="<?php echo $this->get_field_id('dropdown'); ?>"><?php _e( 'Show as dropdown', 'woothemes' ); ?></label><br />

		<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('count'); ?>" name="<?php echo $this->get_field_name('count'); ?>"<?php checked( $count ); ?> />
		<label for="<?php echo $this->get_field_id('count'); ?>"><?php _e( 'Show post counts', 'woothemes' ); ?></label><br />

		<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id('hierarchical'); ?>" name="<?php echo $this->get_field_name('hierarchical'); ?>"<?php checked( $hierarchical ); ?> />
		<label for="<?php echo $this->get_field_id('hierarchical'); ?>"><?php _e( 'Show hierarchy', 'woothemes' ); ?></label></p>
<?php
	}

} // class WooCommerce_Widget_Product_Categories