Location: PHPKode > scripts > Bogo > bogo/includes/widgets.php
<?php

/* Language Switcher Widget */

add_action( 'widgets_init', 'bogo_widgets_init' );

function bogo_widgets_init() {
	register_widget( 'Bogo_Widget_Language_Switcher' );
}

class Bogo_Widget_Language_Switcher extends WP_Widget {

	function __construct() {
		$widget_ops = array(
			'description' => __( 'Language switcher widget by Bogo plugin', 'bogo' ) );

		$control_ops = array();

		WP_Widget::__construct( 'bogo_language_switcher',
			__( 'Language Switcher', 'bogo' ),
			$widget_ops, $control_ops );
	}

	function widget( $args, $instance ) {
		extract( $args );

		$title = apply_filters( 'widget_title',
			empty( $instance['title'] ) ? __( 'Language Switcher', 'bogo' ) : $instance['title'],
			$instance, $this->id_base );

		echo $before_widget;

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

		echo bogo_language_switcher();

		echo $after_widget;
	}

	function form( $instance ) {
		$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );
		$title = strip_tags( $instance['title'] );

		echo '<p><label for="' . $this->get_field_id( 'title' ) . '">' . esc_html( __( 'Title:', 'bogo' ) ) . '</label> <input class="widefat" id="' . $this->get_field_id( 'title' ) . '" name="' . $this->get_field_name( 'title' ) . '" type="text" value="' . esc_attr( $title ) . '" /></p>';
	}

	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;
		$new_instance = wp_parse_args( (array) $new_instance, array( 'title' => '' ) );
		$instance['title'] = strip_tags( $new_instance['title'] );

		return $instance;
	}

}

/* Locale Option */

add_filter( 'widget_display_callback', 'bogo_widget_display_callback', 10, 3 );

function bogo_widget_display_callback( $instance, $widget, $args ) {
	if ( isset( $instance['bogo_locales'] ) ) {
		$locale = get_locale();

		if ( ! in_array( $locale, (array) $instance['bogo_locales'] ) )
			$instance = false;
	}

	return $instance;
}

add_action( 'in_widget_form', 'bogo_in_widget_form', 10, 3 );

function bogo_in_widget_form( $widget, $return, $instance ) {
	$available_languages = bogo_available_languages( 'orderby=value' );

	$selected_languages = ! isset( $instance['bogo_locales'] )
		? array_keys( $available_languages ) : (array) $instance['bogo_locales'];

?>
<fieldset style="padding: .4em 1em .6em; border: 1px solid #ccc;">
<legend style="padding: 0 1em;"><?php echo esc_html( __( 'Displayed on pages in:', 'bogo' ) ); ?></legend>
<?php foreach ( $available_languages as $locale => $language ) : ?>
<input type="checkbox" id="<?php echo $widget->get_field_id( 'bogo_locales' ); ?>" name="<?php echo $widget->get_field_name( 'bogo_locales' ); ?>[]" value="<?php echo esc_attr( $locale ); ?>"<?php echo in_array( $locale, $selected_languages ) ? ' checked="checked"' : ''; ?> />
	<?php echo esc_html( $language ); ?><br />
<?php endforeach; ?>
</fieldset>
<?php

	$return = null;
}

add_filter( 'widget_update_callback', 'bogo_widget_update_callback', 10, 4 );

function bogo_widget_update_callback( $instance, $new_instance, $old_instance, $widget ) {
	if ( isset( $new_instance['bogo_locales'] ) && is_array( $new_instance['bogo_locales'] ) )
		$instance['bogo_locales'] = $new_instance['bogo_locales'];
	else
		$instance['bogo_locales'] = array();

	return $instance;
}

?>
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