README

EventInterceptor 是一个 CComponent，当被观察的组件引发事件时，会触发 onEventIntercepted 事件。onEventIntercepted 事件包含拦截事件的名称以及拦截事件本身。

它主要作为其他组件的工具，可以像这样使用

// create interceptor
$eventInterceptor = new EventInterceptor();

// initialize it: pass the object that should be observed. By default, the
// EventInterceptor will attach itself to all events defined by $subject.
// If you only want to intercept some special events, use:
// $eventInterceptor->initialize( $subject, array('onFoo', 'onBar') );
$eventInterceptor->initialize( $subject );

// whenever the EventInterceptor intercepted an event of $subject, it will
// raise an onEventIntercepted event. Attach an event handler to this event
// that cares for processing. The event handler can be any valid php callback:
// $eventInterceptor->onEventIntercepted = 'handleInterceptedEvent_inGlobalFunction';
// $eventInterceptor->onEventIntercepted = array( 'Foo', 'handleInterceptedEvent_inStaticMethod' );
// $eventInterceptor->onEventIntercepted = array( $obj, 'handleInterceptedEvent_inMethod' );
$eventInterceptor->onEventIntercepted = function( InterceptionEvent $event ) {

  $sender = $event->sender; // will always be the EventInterceptor

  $originalEvent  = $event->getInterceptedEvent();
  $originalSender = $event->getInterceptedEvent()->sender;  // our $subject

  // also available:
  $originalEventName = $event->getInterceptedEventName();

};