AS3 Signals Bubbling note
Sunday, March 07th, 2010 | Author: dehash
Working with this now and just a note that it looks like a way to bubble Signals from a nested display class is as follows:
public var deluxeSignal:DeluxeSignal = new DeluxeSignal(this);
…
deluxeSignal.dispatch(new GenericEvent(true));
and the listening class further up the display list implements IBubbleEventHandler and requires the following method:
public function onEventBubbled(e:IEvent):void {
trace(e +"-"+ e.target +"-"+ e.currentTarget +"-"+ e.signal);
}
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Added a quick example below with source code using the current signals release unedited
here
PS there is an excellent Signals video tutorial here
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Update: Added a new version of the simple example that works with the latest Signals release (0.7). The onEventBubbled method now has a boolean return value to determine whether to continue bubbling or stop.
The new example code can be downloaded here
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Some ideas on passing parameters:
var deluxeSignal:DeluxeSignal = new DeluxeSignal(this);
deluxeSignal.dispatch(new GenericEvent(true));
Here you are passing “this”, ie the sending instance, as the GenericEvent event target so that it is available as the event.target within onEventBubbled(event:IEvent).
Alternately pass in a Value Object (VO) instead of “this” to pass more precise and data typed parameters (you would need to give it a “parent” property) or another option is to extend GenericEvent and give it some custom properties which can be read within onEventBubbled.
Category: Code Examples, Flash | 14 Comments
