Comments on: Event Bubbling in Flex 1.5 & ActionScript 3

By: JesterXL

JesterXL — Wed, 17 May 2006 23:58:56 +0000

var o = {};
o.bubbles = true;
o.type = ‘someEvent’;
o.target = this;
dispatchEvent(o);

You do that in Flex 1.5, and she’ll bubble up.

Flex 1.5 supports event bubbling, even though it outputs Flash Player 7. Flash Player 7 does not have EventDispatcher built into the player, whereas Flash Player 9 does, which Flex 2 uses.

The Macromedia / Adobe developers, however, managed to get the component framework from Flash MX 2004 converted & insanely upgraded for Flex 1 & 1.5 to support event bubbling. The above syntax will not work in Flash MX 2004, nor Flash 8, but will work in Flex 1 and 1.5.

ActionScript 3 is the language utilized to write code for Flash Player 9, whether you choose to utilize Flex 2 technologies or not. It has EventDispatcher built-in, and a lot of the DisplayObjects, such as MovieClip, extend it, which is really nice. Now, MovieClip has dispachEvent built-in and it’s tons faster.

This article was written on 11/2005; the date is acccurate. I know the tile is somewhat abmigious since it says Flex 1.5 and AS3 in the same context even though they are 2 totally seperate technologies.

By: JabbyPanda

JabbyPanda — Wed, 17 May 2006 22:45:39 +0000

Example of event bubbling in Flex 1.5 and AS2 would be nice, because Flex 1.5 docs are saying contradictory information regarding this matter.

And your post from 11/2005 has a title ‘Flex 1.5 and AS3 event bubbling’, which is puzzling too.

Example files from 11/2005 attached with your post are written in AS3.

By: JesterXL

JesterXL — Wed, 17 May 2006 16:47:56 +0000

Event Bubbling is built into the Flash Player 9, so yes. In Flex 1.5 it had to be built into the component framework, but now even dispatcher is part of the player itself.

By: JabbyPanda

JabbyPanda — Wed, 17 May 2006 13:32:55 +0000

Speaking about read-only ‘bubbles’ property in Flex 2 UI framework.

Documentation doc is here:
http://livedocs.macromedia.com/labs/1/flex20beta3/langref/flash/events/Event.html

We had spotted, that the constructor of Event expects ‘bubble’ property as parameter:
—-
Event(type:String, bubbles:Boolean = false, cancelable:Boolean = false)

Creates an Event object to pass as a parameter to event listeners.
—-
Does this mean that we can set bubbles property when creating new instance of the event?

By: JesterXL

JesterXL — Thu, 10 Nov 2005 16:41:11 +0000

Cool; just commented out those 2 lines of code, and she worked great; nice! Thanks man.

How do you do it with a custom event? The bubbles property is read-only, and my custom event class didn’t work…