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Only look at the deltaY and deltaX for the lowestDelta and floor values

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that are greater than or equal to 1
This commit is contained in:
Brandon Aaron
2013-11-13 12:23:18 -05:00
parent 36ece575ac
commit 0e208577b4
1 changed files with 15 additions and 17 deletions
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jquery.mousewheel.js
+15 -17
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@@ -19,10 +19,11 @@
}
}(function ($) {
var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'];
var toBind = 'onwheel' in document || document.documentMode >= 9 ? ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'];
var slice = Array.prototype.slice;
var lowestDelta, lowestDeltaXY;
var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'],
toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ?
['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'],
slice = Array.prototype.slice,
lowestDelta;
if ( $.event.fixHooks ) {
for ( var i = toFix.length; i; ) {
@@ -69,9 +70,7 @@
delta = 0,
deltaX = 0,
deltaY = 0,
absDelta = 0,
absDeltaXY = 0,
fn;
absDelta = 0;
event = $.event.fix(orgEvent);
event.type = 'mousewheel';
@@ -103,17 +102,16 @@
// No change actually happened, no reason to go any further
if ( deltaY === 0 && deltaX === 0 ) { return; }
// 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; }
// Store lowest absolute delta to normalize the delta values
absDelta = Math.max( Math.abs(deltaY), Math.abs(deltaX) );
if ( !lowestDelta || absDelta < lowestDelta ) {
lowestDelta = absDelta;
}
// 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);
// Get a whole, normalized value for the deltas
delta = Math[ delta >= 1 ? 'floor' : 'ceil' ](delta / lowestDelta);
deltaX = Math[ deltaX >= 1 ? 'floor' : 'ceil' ](deltaX / lowestDelta);
deltaY = Math[ deltaY >= 1 ? 'floor' : 'ceil' ](deltaY / lowestDelta);
// Add event and delta to the front of the arguments
args.unshift(event, delta, deltaX, deltaY);