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Widget Example using dynamic params based off settings
<?php
/**
* Example Widget
*
*/
class ck_example_widget extends WP_Widget {
/** Constructor */
function __construct() {
parent::__construct( 'ck_example_widget', Example Widget, array( 'description' => 'My Example Widget' ) );
add_filter( 'dynamic_sidebar_params', array( $this, 'widget_class' ), 10, 1 );
}
/** @see WP_Widget::widget */
function widget( $args, $instance ) {
$args['id'] = ( isset( $args['id'] ) ) ? $args['id'] : 'ck_example_widget';
$instance['title'] = ( isset( $instance['title'] ) ) ? $instance['title'] : '';
$title = apply_filters( 'widget_title', $instance['title'], $instance, $args['id'] );
echo $args['before_widget'];
if ( $title ) {
echo $args['before_title'] . $title . $args['after_title'];
}
// Your widget content
echo $args['after_widget'];
}
/** @see WP_Widget::update */
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title'] = strip_tags( $new_instance['title'] );
$instance['add_wrapper_class'] = isset( $new_instance['add_wrapper_class'] );
return $instance;
}
/** @see WP_Widget::form */
function form( $instance ) {
$defaults = array(
'title' => '',
'add_wrapper_class' => false,
);
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<p>
<label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>">
Widget Title
</label>
<input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo $instance['title']; ?>"/>
</p>
<p>
<input <?php checked( $instance['add_wrapper_class'], true ); ?> id="<?php echo esc_attr( $this->get_field_id( 'add_wrapper_class' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'add_wrapper_class' ) ); ?>" type="checkbox" />
<label for="<?php echo esc_attr( $this->get_field_id( 'add_wrapper_class' ) ); ?>">
Apply CSS Class to Wrapper?
</label>
</p>
<?php
}
/**
* Check the widget options before it's wrapper loads to add classes
* @param $params
*
* @return array
*/
public function widget_class( $params ) {
if ( strpos( $params[0]['widget_id'], 'ck_example_widget' ) !== false ) {
$instance_id = $params[1]['number'];
$all_settings = $this->get_settings();
$instance_settings = $all_settings[ $instance_id ];
if ( ! empty( $instance_settings['add_wrapper_class'] ) ) {
/**
* Here, you can do some logic to determine what $class should be equal to.
*
* For example, on Easy Digital Downloads we look for the option and check if the cart
* is empty or not using something like:
* $class = ! empty( edd_get_cart_contents() ) ? 'cart-not-empty' : 'cart-empty';
*/
$class = 'my-awesome-css-class';
$params[0]['before_widget'] = preg_replace( '/class="(.*?)"/', 'class="$1 ' . $class . '"', $params[0]['before_widget'] );
}
}
return $params;
}
}
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