How to get the wheelDelta on scroll event

Hi All,

I have a panel for with registered scroll event.

When the scroll event fires i want to get the wheelDelta value.



panel.body.on('scroll', function(event, target, eObj) {



event.getWheelDelta() // Returning always 0

event.getWheelDelatas() // Returning {x:0, y:0}



});



How to get the value?



Can anybody plz help me to achieve this?