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Fix the handling of older 120 based deltas.

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This commit is contained in:
Brandon Aaron
2013-12-14 14:08:48 -05:00
parent cafeaf9f4d
commit c7a2d66249
1 changed files with 18 additions and 11 deletions
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jquery.mousewheel.js
+18 -11
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@@ -1,7 +1,7 @@
/*! Copyright (c) 2013 Brandon Aaron (http://brandon.aaron.sh) /*! Copyright (c) 2013 Brandon Aaron (http://brandon.aaron.sh)
* Licensed under the MIT License (LICENSE.txt). * Licensed under the MIT License (LICENSE.txt).
* *
* Version: 3.1.7 * Version: 3.1.8-pre
* *
* Requires: jQuery 1.2.2+ * Requires: jQuery 1.2.2+
*/ */
@@ -23,7 +23,7 @@
toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ? toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ?
['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'], ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'],
slice = Array.prototype.slice, slice = Array.prototype.slice,
nullLowestDeltaTimeout, lowestDelta; oldMode, nullLowestDeltaTimeout, lowestDelta;
if ( $.event.fixHooks ) { if ( $.event.fixHooks ) {
for ( var i = toFix.length; i; ) { for ( var i = toFix.length; i; ) {
@@ -32,7 +32,7 @@
} }
var special = $.event.special.mousewheel = { var special = $.event.special.mousewheel = {
version: '3.1.6', version: '3.1.8-pre',
setup: function() { setup: function() {
if ( this.addEventListener ) { if ( this.addEventListener ) {
@@ -137,17 +137,23 @@
if ( !lowestDelta || absDelta < lowestDelta ) { if ( !lowestDelta || absDelta < lowestDelta ) {
lowestDelta = absDelta; lowestDelta = absDelta;
// Assuming that if the lowestDelta is 120, then that the browser
// is treating this as an older mouse wheel event.
// We'll divide it by 40 to try and get a more usable deltaFactor.
if ( lowestDelta === 120 ) {
oldMode = true;
lowestDelta /= 40;
}
} }
// Assuming that if the lowestDelta is 120, then that the browser // When in oldMode the delta is based on 120. We devide
// is treating this as an older mouse wheel event. // by 40 to try and get a more usable deltaFactor.
// We'll divide it by 40 to try and get a more usable deltaFactor. if ( oldMode ) {
if ( lowestDelta === 120 ) {
// Divide all the things by 40! // Divide all the things by 40!
delta /= 40; delta /= 40;
deltaX /= 40; deltaX /= 40;
deltaY /= 40; deltaY /= 40;
lowestDelta /= 40;
} }
// Get a whole, normalized value for the deltas // Get a whole, normalized value for the deltas
@@ -179,6 +185,7 @@
function nullLowestDelta() { function nullLowestDelta() {
lowestDelta = null; lowestDelta = null;
oldMode = null;
} }
})); }));