Comments on: MouseWheelTrap – how to stop simultaneous Flash / browser scrolling in AS3

By: Liam

Liam — Wed, 30 Jun 2010 15:26:00 +0000

Yeah, good point. I think there was I reason I used MOUSE_MOVE instead (probably to do with right-clicking or something). It may be a left over from a stage.frameRate idling thing I did that worked nicely (since this had internal logic to ensure it only updates when necessary).

When I get some time, I’ll test the change and implement it if I can’t break it I’ll also format the JavaScript as XML for clarity – thanks for the heads up!

By: xxcc

xxcc — Sun, 27 Jun 2010 19:30:55 +0000

Hey there,
it’s really nice solution you posted. Helped me out alot!
However, while testing my flash app (not very optimized and many animations and data processing going on) on various browsers. I’ve noticed that the app lags A LOT in Opera. I first tried to replace eval with xml-formated js, then moved the js eval section of your code to the html header, still no good. Then analyzed the code a little bit closer and changed
stage.addEventListener(MouseEvent.MOUSE_MOVE, function():void {
to
stage.addEventListener(MouseEvent.MOUSE_OVER, function():void {
It’s completely sufficient to use MOUSE_OVER event type to initiate MouseWheelTrap, since otherwise the flash has to send request to the javascript every single time the cursor moves around. This little correction brings a slight performance boost in IE/FF/Chrome and a HUGE ONE in Opera (v 10.50).
Hope this helps anyone.

By: Liam

Liam — Tue, 22 Jun 2010 15:38:20 +0000

Melmendo, I’d say that could be to do with the fact that Flex builds its children in the background and isn’t actually quite ready when you expect it. If you have a search MouseWheelTrap, I think a few people out there adapted it for better Flex support – I will look into it.

By: melmendo

melmendo — Wed, 09 Jun 2010 14:58:23 +0000

It works great in firefox and safari. In IE and chrome I must first click on my map (.swf). Once I do this it works great fine. Could this be a javascript issue? I’m using flex 3 so the only changes I’ve made were to the addEventListeners.

FROM
mx.core.FlexGlobals.topLevelApplication.addEventListener(MouseEvent.ROLL_OUT, function():void

TO
Application.application.addEventListener(MouseEvent.ROLL_OUT, function():void

sample page (the map at bottom of page) : http://crownpeak.vipnet.org/cmsportal3/

Thanks in advance,
Mark

By: Liam

Liam — Thu, 29 Apr 2010 10:06:36 +0000

Actually, it does use JavaScript, but the code is injected at runtime by the Flash – which means you still needs scripting access allowed, but at least you don’t need an external JS file too

Note that I’ve now hosted the code at http://code.google.com/p/mousewheeltrap/