public function category_widget() {

		$categories = get_terms( 'product_cat', array( 'orderby' => 'name' ) );
		?>
		<form method="GET">
			<div>
				<select multiple="multiple" data-placeholder="<?php esc_attr_e( 'Select categories&hellip;', 'woocommerce' ); ?>" class="wc-enhanced-select" id="show_categories" name="show_categories[]" style="width: 205px;">
					<?php
						$r                 = array();
						$r['pad_counts']   = 1;
						$r['hierarchical'] = 1;
						$r['hide_empty']   = 1;
						$r['value']        = 'id';
						$r['selected']     = $this->show_categories;

						include_once WC()->plugin_path() . '/includes/walkers/class-wc-product-cat-dropdown-walker.php';

						echo wc_walk_category_dropdown_tree( $categories, 0, $r ); // @codingStandardsIgnoreLine
					?>
				</select>
				<?php // @codingStandardsIgnoreStart ?>
				<a href="#" class="select_none"><?php esc_html_e( 'None', 'woocommerce' ); ?></a>
				<a href="#" class="select_all"><?php esc_html_e( 'All', 'woocommerce' ); ?></a>
				<button type="submit" class="submit button" value="<?php esc_attr_e( 'Show', 'woocommerce' ); ?>"><?php esc_html_e( 'Show', 'woocommerce' ); ?></button>
				<input type="hidden" name="range" value="<?php echo ( ! empty( $_GET['range'] ) ) ? esc_attr( wp_unslash( $_GET['range'] ) ) : ''; ?>" />
				<input type="hidden" name="start_date" value="<?php echo ( ! empty( $_GET['start_date'] ) ) ? esc_attr( wp_unslash( $_GET['start_date'] ) ) : ''; ?>" />
				<input type="hidden" name="end_date" value="<?php echo ( ! empty( $_GET['end_date'] ) ) ? esc_attr( wp_unslash( $_GET['end_date'] ) ) : ''; ?>" />
				<input type="hidden" name="page" value="<?php echo ( ! empty( $_GET['page'] ) ) ? esc_attr( wp_unslash( $_GET['page'] ) ) : ''; ?>" />
				<input type="hidden" name="tab" value="<?php echo ( ! empty( $_GET['tab'] ) ) ? esc_attr( wp_unslash( $_GET['tab'] ) ) : ''; ?>" />
				<input type="hidden" name="report" value="<?php echo ( ! empty( $_GET['report'] ) ) ? esc_attr( wp_unslash( $_GET['report'] ) ) : ''; ?>" />
				<?php // @codingStandardsIgnoreEnd ?>
			</div>
			<script type="text/javascript">
				jQuery(function(){
					// Select all/None
					jQuery( '.chart-widget' ).on( 'click', '.select_all', function() {
						jQuery(this).closest( 'div' ).find( 'select option' ).attr( 'selected', 'selected' );
						jQuery(this).closest( 'div' ).find('select').change();
						return false;
					});

					jQuery( '.chart-widget').on( 'click', '.select_none', function() {
						jQuery(this).closest( 'div' ).find( 'select option' ).removeAttr( 'selected' );
						jQuery(this).closest( 'div' ).find('select').change();
						return false;
					});
				});
			</script>
		</form>
		<?php
	}