mouseWheel direction

[flash_boy]

How do I capture the direction of the mouse wheel. I am working a tool that allows users to zoom in and out on images using the mouse wheel. Not a big deal for one direction and probably not a big deal for both but I'm pretty new to Flex and could use any help you all might be able to offer.

Sincerely,
flash_boy

[Hockey13]

Hi flash_boy,

I'm relatively new to flex as well, but perhaps I can help you. After searching around, I was able to find this:

http://www.kylehayes.info/blog/index.cfm/2008/5/8/Scroll-Through-Tabs-in-Flex-with-Mouse-Wheel

On that page, there is this code:

private function mouseWheel_handler(event:MouseEvent):void
{
if(event.delta > 0)
{
if(this.selectedIndex != this.numChildren-1)
this.selectedIndex++;
}
else
{
if(this.selectedIndex != 0)
this.selectedIndex--;
}
}

It looks like the delta property of a MouseEvent is set to a positive number when the wheel scrolls forward and to a negative number when it scrolls back. I could be wrong about the direction, but give it a try and let me know how it works for you (I'm at work (finance, not programming ;-), so I can't get into Flex right now).

[Hockey13]

Quick follow-up...I found another site that covers this topic a bit:

http://www.kirupa.com/forum/archive/index.php/t-275845.html

-Hockey

[flash_boy]

I didn't try the second one but the first worked perfectly. Thank you very much.

Sincerely,
flash_boy