yii2-bootstrap/framework/base/Event.php

<?php
/**
 * Event class file.
 *
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2012 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\base;

/**
 * Event is the base class for all event classes.
 *
 * It encapsulates the parameters associated with an event.
 * The [[sender]] property describes who raises the event.
 * And the [[handled]] property indicates if the event is handled.
 * If an event handler sets [[handled]] to be true, the rest of the
 * uninvoked handlers will be canceled.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Event extends Component
{
	/**
	 * @var object the sender of this event
	 */
	public $sender;
	/**
	 * @var boolean whether the event is handled. Defaults to false.
	 * When a handler sets this to be true, the rest of the uninvoked event handlers will be canceled.
	 */
	public $handled = false;

	/**
	 * Constructor.
	 * @param mixed $sender sender of the event
	 */
	public function __construct($sender=null)
	{
		$this->sender = $sender;
	}
}