Suggetion about event.

[mdmunir]

Reopen old issue #3243. Maybe for 2.1

Event as jquery like

1. Trigger event using name or object (break BC? yes/no).

Currently, to send event object, it must be as as second parameter of trigger(). But, event object itself contain name property. Better first parameter can be event name or event object.

// use
Yii::$app->trigger('myEvent');
// or use
$myEvent = new Event('myEvent');
Yii::$app->trigger($myEvent);

2. Use return false; or $event->stopPropagation() to stop handling (break BC? no).

Currently to stop event handling we use $event->handled = true. Prefer using return false.

Yii::$app->on('myEvent', function($event){
    //...
    if ($condition){
        return false;
        // or $event->stopPropagation();
        // instead of $event->handled = true;
    }
});

Yii::$app->trigger('myEvent');

3. Add extra parameter when trigger event (break BC? no).

Yii::$app->on('myEvent', function($event, $param1, $param2){
    // do with $param1 and $param2
});

Yii::$app->trigger('myEvent',['param1', 'param2']);

[samdark]

There's going to be an event manager PSR in the works soon: https://groups.google.com/forum/#!topic/php-fig/MFL__YvumkE

[samdark]

Here: https://github.com/bretterer/fig-standards/blob/event-manager/proposed/event-manager.md

It totally makes sense so I'd adopt it.

[mdmunir]

hmm... What target actually is? What different with sender? If event only triggered from Event Manager, i am affraid we must adopt namespace.

[samdark]

PSR doesn't force you to name events in any certain way but yes, I guess it would lead to names like namespace.eventName. Target serves the same purpose as sender. You can see targets in JavaScript DOM events everywhere. Usually it is what triggered the event.

[wensiti]

@mdmunir I like this way ，Laravel's event is implemented