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fix rounding issue when delta is less than 0

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Brandon Aaron
2013-02-23 18:12:57 -06:00
parent 2e2dc57aaa
commit 4b3f1b73b2
1 changed files with 9 additions and 3 deletions
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jquery.mousewheel.js
+9 -3
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@@ -64,7 +64,7 @@
function handler(event) {
var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, deltaX = 0, deltaY = 0, absDelta = 0, absDeltaXY = 0;
var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, deltaX = 0, deltaY = 0, absDelta = 0, absDeltaXY = 0, fn;
event = $.event.fix(orgEvent);
event.type = "mousewheel";
@@ -86,14 +86,20 @@
if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; }
if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; }
// Look for lowest delta to normalize the delta values
absDelta = Math.abs(delta);
if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; }
absDeltaXY = Math.max( Math.abs(deltaY), Math.abs(deltaX) );
if ( !lowestDeltaXY || absDeltaXY < lowestDeltaXY ) { lowestDeltaXY = absDeltaXY; }
// Get a whole value for the deltas
fn = delta > 0 ? 'floor' : 'ceil';
delta = Math[fn](delta/lowestDelta);
deltaX = Math[fn](deltaX/lowestDeltaXY);
deltaY = Math[fn](deltaY/lowestDeltaXY);
// Add event and delta to the front of the arguments
args.unshift(event, Math.floor(delta/lowestDelta), Math.floor(deltaX/lowestDeltaXY), Math.floor(deltaY/lowestDeltaXY));
args.unshift(event, delta, deltaX, deltaY);
return ($.event.dispatch || $.event.handle).apply(this, args);
}