FLEX, Actionscript: how can I invoke a CustomEvent ?

Question

hi,

I've created a custom MouseEvent in Flex:

package {

    import flash.events.MouseEvent; 
    public class CustomMouseEvent extends MouseEvent {

        public var tags:Array = new Array();    
        public function CustomMouseEvent(type:String, tags:Array) {
            super(type, true);
            this.tags = tags;
        }
    }
   }

Now I would like to understand how to pass the parameter tags from both Actionscript and MXML:

From actionscript I'm trying something like this, but it doesn't work:

newTag.addEventListener(MouseEvent.MOUSE_UP, dispatchEvent(new CustomMouseEvent(MouseEvent.MOUSE_UP,[newTag.name])));

From MXML i'm doing this and it doesn't work as well:

<mx:LinkButton click="dispatchEvent(new CustomMouseEvent(MouseEvent.MOUSE_UP, bookmarksRepeater.currentItem.tags))" />

thanks

Answer 1

Try wrapping the callback code in a function:

newTag.addEventListener(MouseEvent.MOUSE_UP, function(e:MouseEvent):void {
    dispatchEvent(new CustomMouseEvent(MouseEvent.MOUSE_UP, [e.currentTarget.name]));
});

I think the issue with the MXML code is that you are using a repeater and trying to get the currentItem after the repeating has finished. Try this instead:

<mx:LinkButton click="dispatchEvent(new CustomMouseEvent(MouseEvent.MOUSE_UP, event.currentTarget.getRepeaterItem().tags))" />

Hope that helps.

Update

Since you are creating the newTag object in a loop, you'll get better memory usage by just using a named function as the event listener.

newTag.addEventListener(MouseEvent.MOUSE_UP, onTagClick);

...

protected function onTagClick(e:MouseEvent):void {
    dispatchEvent(new CustomMouseEvent(MouseEvent.MOUSE_UP, [e.currentTarget.name]));
}

That way you only create one event listener, rather than n listeners that do that exact same thing.

Answer 2

also, you may be getting TypeErrors for not having overridden the clone method. You should fix that now, before you run into it later.

greetz
back2dos

Answer 3

Have you tried changing type to something other than a type that is currently being used. Something like CustomMouseEvent.MY_CUSTOM_MOUSE and then catch that to see if this works. Not sure if using the same Type name as a standard type is a good technique.