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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