├── .gitignore ├── test ├── browserify │ ├── main.js │ ├── index.html │ └── README.md ├── scroll.html └── index.html ├── bower.json ├── .jshintrc ├── package.json ├── Gruntfile.js ├── LICENSE.txt ├── jquery.mousewheel.min.js ├── README.md ├── ChangeLog.md └── jquery.mousewheel.js /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | /npm-debug.log 3 | /node_modules 4 | /test/browserify/node_modules 5 | -------------------------------------------------------------------------------- /test/browserify/main.js: -------------------------------------------------------------------------------- 1 | var $ = require('jquery-browserify'); 2 | require('../../jquery.mousewheel.js')($); 3 | -------------------------------------------------------------------------------- /test/browserify/index.html: -------------------------------------------------------------------------------- 1 | 2 | 5 | -------------------------------------------------------------------------------- /test/browserify/README.md: -------------------------------------------------------------------------------- 1 | # browserify test 2 | 3 | First run 4 | 5 | ```js 6 | npm install jquery-browserify 7 | ``` 8 | 9 | Then run 10 | 11 | ```js 12 | browserify main.js > bundle.js 13 | ``` 14 | 15 | Then open index.html and console and scroll with the mousewheel. Should see the events being logged. 16 | -------------------------------------------------------------------------------- /bower.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "jquery-mousewheel", 3 | "main": "./jquery.mousewheel.js", 4 | "ignore": [ 5 | "*.json", 6 | "*.markdown", 7 | "*.txt", 8 | ".*", 9 | "!LICENSE.txt", 10 | "Gruntfile.js", 11 | "test" 12 | ], 13 | "dependencies": { 14 | "jquery": ">=1.2.2" 15 | } 16 | } 17 | -------------------------------------------------------------------------------- /.jshintrc: -------------------------------------------------------------------------------- 1 | { 2 | "bitwise": true, 3 | "browser": true, 4 | "camelcase": true, 5 | "curly": true, 6 | "eqeqeq": true, 7 | "indent": 4, 8 | "jquery" : true, 9 | "latedef": true, 10 | "noarg": true, 11 | "node": true, 12 | "noempty": true, 13 | "plusplus": false, 14 | "quotmark": "single", 15 | "strict": false, 16 | "trailing": true, 17 | "unused": true, 18 | "globals": { "define": true, "require": true } 19 | } 20 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "jquery-mousewheel", 3 | "version": "3.1.13", 4 | "author": { 5 | "name": "jQuery Foundation and other contributors", 6 | "url": "https://github.com/jquery/jquery-mousewheel/blob/master/AUTHORS.txt" 7 | }, 8 | "description": "A jQuery plugin that adds cross-browser mouse wheel support.", 9 | "licenses": [ 10 | { 11 | "type": "MIT", 12 | "url": "https://github.com/jquery/jquery-mousewheel/blob/master/LICENSE.txt" 13 | } 14 | ], 15 | "homepage": "https://github.com/jquery/jquery-mousewheel", 16 | "main": "./jquery.mousewheel.js", 17 | "repository": { 18 | "type": "git", 19 | "url": "https://github.com/jquery/jquery-mousewheel.git" 20 | }, 21 | "bugs": { 22 | "url": "https://github.com/jquery/jquery-mousewheel/issues" 23 | }, 24 | "keywords": [ 25 | "jquery", 26 | "mouse", 27 | "wheel", 28 | "event", 29 | "mousewheel", 30 | "jquery-plugin", 31 | "browser" 32 | ], 33 | "files": [ 34 | "ChangeLog.md", 35 | "jquery.mousewheel.js", 36 | "README.md", 37 | "LICENSE.txt" 38 | ], 39 | "devDependencies": { 40 | "grunt": "~0.4.1", 41 | "grunt-contrib-connect": "~0.5.0", 42 | "grunt-contrib-jshint": "~0.7.1", 43 | "grunt-contrib-uglify": "~0.2.7" 44 | }, 45 | "directories": { 46 | "test": "test" 47 | }, 48 | "jam": { 49 | "dependencies": { 50 | "jquery": ">=1.2.2" 51 | } 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /Gruntfile.js: -------------------------------------------------------------------------------- 1 | module.exports = function(grunt) { 2 | 3 | // Project configuration. 4 | grunt.initConfig({ 5 | jshint: { 6 | options: { 7 | jshintrc: '.jshintrc' 8 | }, 9 | all: ['jquery.mousewheel.js'] 10 | }, 11 | uglify: { 12 | options: { 13 | compress: true, 14 | mangle: true, 15 | preserveComments: 'some', 16 | report: 'gzip' 17 | }, 18 | build: { 19 | src: 'jquery.mousewheel.js', 20 | dest: 'jquery.mousewheel.min.js' 21 | } 22 | }, 23 | connect: { 24 | server: { 25 | options: { 26 | hostname: '*', 27 | keepalive: true, 28 | middleware: function(connect, options) { 29 | return [ 30 | connect.static(options.base), 31 | connect.directory(options.base) 32 | ]; 33 | } 34 | } 35 | } 36 | } 37 | }); 38 | 39 | // Load the plugin that provides the 'uglify' task. 40 | grunt.loadNpmTasks('grunt-contrib-jshint'); 41 | grunt.loadNpmTasks('grunt-contrib-uglify'); 42 | grunt.loadNpmTasks('grunt-contrib-connect'); 43 | 44 | // Default task(s). 45 | grunt.registerTask('default', ['jshint', 'uglify']); 46 | 47 | }; 48 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | Copyright jQuery Foundation and other contributors 2 | https://jquery.org/ 3 | 4 | This software consists of voluntary contributions made by many 5 | individuals. For exact contribution history, see the revision history 6 | available at https://github.com/jquery/jquery-mousewheel 7 | 8 | The following license applies to all parts of this software except as 9 | documented below: 10 | 11 | ==== 12 | 13 | Permission is hereby granted, free of charge, to any person obtaining 14 | a copy of this software and associated documentation files (the 15 | "Software"), to deal in the Software without restriction, including 16 | without limitation the rights to use, copy, modify, merge, publish, 17 | distribute, sublicense, and/or sell copies of the Software, and to 18 | permit persons to whom the Software is furnished to do so, subject to 19 | the following conditions: 20 | 21 | The above copyright notice and this permission notice shall be 22 | included in all copies or substantial portions of the Software. 23 | 24 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 28 | LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 29 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 30 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 31 | 32 | ==== 33 | 34 | All files located in the node_modules and external directories are 35 | externally maintained libraries used by this software which have their 36 | own licenses; we recommend you read them, as their terms may differ from 37 | the terms above. 38 | -------------------------------------------------------------------------------- /test/scroll.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Scroll Test 5 | 14 | 26 | 27 | 43 | 44 | 45 |
46 |
47 | 48 | 49 | -------------------------------------------------------------------------------- /jquery.mousewheel.min.js: -------------------------------------------------------------------------------- 1 | /*! 2 | * jQuery Mousewheel 3.1.13 3 | * 4 | * Copyright 2015 jQuery Foundation and other contributors 5 | * Released under the MIT license. 6 | * http://jquery.org/license 7 | */ 8 | !function(a){"function"==typeof define&&define.amd?define(["jquery"],a):"object"==typeof exports?module.exports=a:a(jQuery)}(function(a){function b(b){var g=b||window.event,h=i.call(arguments,1),j=0,l=0,m=0,n=0,o=0,p=0;if(b=a.event.fix(g),b.type="mousewheel","detail"in g&&(m=-1*g.detail),"wheelDelta"in g&&(m=g.wheelDelta),"wheelDeltaY"in g&&(m=g.wheelDeltaY),"wheelDeltaX"in g&&(l=-1*g.wheelDeltaX),"axis"in g&&g.axis===g.HORIZONTAL_AXIS&&(l=-1*m,m=0),j=0===m?l:m,"deltaY"in g&&(m=-1*g.deltaY,j=m),"deltaX"in g&&(l=g.deltaX,0===m&&(j=-1*l)),0!==m||0!==l){if(1===g.deltaMode){var q=a.data(this,"mousewheel-line-height");j*=q,m*=q,l*=q}else if(2===g.deltaMode){var r=a.data(this,"mousewheel-page-height");j*=r,m*=r,l*=r}if(n=Math.max(Math.abs(m),Math.abs(l)),(!f||f>n)&&(f=n,d(g,n)&&(f/=40)),d(g,n)&&(j/=40,l/=40,m/=40),j=Math[j>=1?"floor":"ceil"](j/f),l=Math[l>=1?"floor":"ceil"](l/f),m=Math[m>=1?"floor":"ceil"](m/f),k.settings.normalizeOffset&&this.getBoundingClientRect){var s=this.getBoundingClientRect();o=b.clientX-s.left,p=b.clientY-s.top}return b.deltaX=l,b.deltaY=m,b.deltaFactor=f,b.offsetX=o,b.offsetY=p,b.deltaMode=0,h.unshift(b,j,l,m),e&&clearTimeout(e),e=setTimeout(c,200),(a.event.dispatch||a.event.handle).apply(this,h)}}function c(){f=null}function d(a,b){return k.settings.adjustOldDeltas&&"mousewheel"===a.type&&b%120===0}var e,f,g=["wheel","mousewheel","DOMMouseScroll","MozMousePixelScroll"],h="onwheel"in document||document.documentMode>=9?["wheel"]:["mousewheel","DomMouseScroll","MozMousePixelScroll"],i=Array.prototype.slice;if(a.event.fixHooks)for(var j=g.length;j;)a.event.fixHooks[g[--j]]=a.event.mouseHooks;var k=a.event.special.mousewheel={version:"3.1.12",setup:function(){if(this.addEventListener)for(var c=h.length;c;)this.addEventListener(h[--c],b,!1);else this.onmousewheel=b;a.data(this,"mousewheel-line-height",k.getLineHeight(this)),a.data(this,"mousewheel-page-height",k.getPageHeight(this))},teardown:function(){if(this.removeEventListener)for(var c=h.length;c;)this.removeEventListener(h[--c],b,!1);else this.onmousewheel=null;a.removeData(this,"mousewheel-line-height"),a.removeData(this,"mousewheel-page-height")},getLineHeight:function(b){var c=a(b),d=c["offsetParent"in a.fn?"offsetParent":"parent"]();return d.length||(d=a("body")),parseInt(d.css("fontSize"),10)||parseInt(c.css("fontSize"),10)||16},getPageHeight:function(b){return a(b).height()},settings:{adjustOldDeltas:!0,normalizeOffset:!0}};a.fn.extend({mousewheel:function(a){return a?this.bind("mousewheel",a):this.trigger("mousewheel")},unmousewheel:function(a){return this.unbind("mousewheel",a)}})}); -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # jQuery Mouse Wheel Plugin 2 | 3 | A [jQuery](http://jquery.com/) plugin that adds cross-browser mouse wheel support with delta normalization. 4 | 5 | #### Note: There is a [bug in Safari 9](https://github.com/jquery/jquery-mousewheel/issues/156) that prevents the plugin from working properly. See [this comment](https://github.com/jquery/jquery-mousewheel/issues/156#issuecomment-185433754) for some possible workarounds, and [watch this Webkit ticket](https://bugs.webkit.org/show_bug.cgi?id=149526) to find out if and when Apple will fix it. 6 | 7 | In order to use the plugin, simply bind the `mousewheel` event to an element. 8 | 9 | It also provides two helper methods called `mousewheel` and `unmousewheel` 10 | that act just like other event helper methods in jQuery. 11 | 12 | The event object is updated with the normalized `deltaX` and `deltaY` properties. 13 | In addition there is a new property on the event object called `deltaFactor`. Multiply 14 | the `deltaFactor` by `deltaX` or `deltaY` to get the scroll distance that the browser 15 | has reported. 16 | 17 | Here is an example of using both the bind and helper method syntax: 18 | 19 | ```js 20 | // using on 21 | $('#my_elem').on('mousewheel', function(event) { 22 | console.log(event.deltaX, event.deltaY, event.deltaFactor); 23 | }); 24 | 25 | // using the event helper 26 | $('#my_elem').mousewheel(function(event) { 27 | console.log(event.deltaX, event.deltaY, event.deltaFactor); 28 | }); 29 | ``` 30 | 31 | The old behavior of adding three arguments (`delta`, `deltaX`, and `deltaY`) to the 32 | event handler is now deprecated and will be removed in later releases. 33 | 34 | 35 | ## The Deltas... 36 | 37 | The combination of Browsers, Operating Systems, and Devices offer a huge range of possible delta values. In fact if the user 38 | uses a trackpad and then a physical mouse wheel the delta values can differ wildly. This plugin normalizes those 39 | values so you get a whole number starting at +-1 and going up in increments of +-1 according to the force or 40 | acceleration that is used. This number has the potential to be in the thousands depending on the device. 41 | Check out some of the data collected from users [here](http://mousewheeldatacollector.herokuapp.com/). 42 | 43 | ### Getting the scroll distance 44 | 45 | In some use-cases we prefer to have the normalized delta but in others we want to know how far the browser should 46 | scroll based on the users input. This can be done by multiplying the `deltaFactor` by the `deltaX` or `deltaY` 47 | event property to find the scroll distance the browser reported. 48 | 49 | The `deltaFactor` property was added to the event object in 3.1.5 so that the actual reported delta value can be 50 | extracted. This is a non-standard property. 51 | 52 | 53 | ## Using with [Browserify](http://browserify.org) 54 | 55 | Support for browserify is baked in. 56 | 57 | ```bash 58 | npm install jquery-mousewheel 59 | npm install jquery-browserify 60 | ``` 61 | 62 | In your server-side node.js code: 63 | 64 | ```js 65 | var express = require('express'); 66 | var app = express.createServer(); 67 | 68 | app.use(require('browserify')({ 69 | require : [ 'jquery-browserify', 'jquery-mousewheel' ] 70 | })); 71 | ``` 72 | 73 | In your browser-side javascript: 74 | 75 | ```js 76 | var $ = require('jquery-browserify'); 77 | require('jquery-mousewheel')($); 78 | ``` 79 | -------------------------------------------------------------------------------- /ChangeLog.md: -------------------------------------------------------------------------------- 1 | # Mouse Wheel ChangeLog 2 | 3 | ## 3.1.13 4 | 5 | * Update copyright notice and license to remove years 6 | * Create the correct compressed version 7 | * Remove the obsolete jQuery Plugin Registry file 8 | 9 | ## 3.1.12 10 | 11 | * Fix possible 0 value for line height when in delta mode 1 12 | 13 | ## 3.1.11 14 | 15 | * Fix version number for package managers... 16 | 17 | ## 3.1.10 18 | 19 | * Fix issue with calculating line height when using older versions of jQuery 20 | * Add offsetX/Y normalization with setting to turn it off 21 | * Cleans up data on teardown 22 | 23 | ## 3.1.9 24 | 25 | * Fix bower.json file 26 | * Updated how the deltas are adjusted for older mousewheel based events that have deltas that are factors of 120. 27 | * Add $.event.special.mousewheel.settings.adjustOldDeltas (defaults to true) to turn off adjusting of old deltas that are factors of 120. You'd turn this off if you want to be as close to native scrolling as possible. 28 | 29 | ## 3.1.8 30 | 31 | * Even better handling of older browsers that use a wheelDelta based on 120 32 | * And fix version reported by `$.event.special.mousewheel` 33 | 34 | ## 3.1.7 35 | 36 | * Better handle the `deltaMode` values 1 (lines) and 2 (pages) 37 | * Attempt to better handle older browsers that use a wheelDelta based on 120 38 | 39 | ## 3.1.6 40 | 41 | * Deprecating `delta`, `deltaX`, and `deltaY` event handler arguments 42 | * Update actual event object with normalized `deltaX `and `deltaY` values (`event.deltaX`, `event.deltaY`) 43 | * Add `deltaFactor` to the event object (`event.deltaFactor`) 44 | * Handle `> 0` but `< 1` deltas better 45 | * Do not fire the event if `deltaX` and `deltaY` are `0` 46 | * Better handle different devices that give different `lowestDelta` values 47 | * Add `$.event.special.mousewheel.version` 48 | * Some clean up 49 | 50 | ## 3.1.5 51 | 52 | * Bad release because I did not update the new `$.event.special.mousewheel.version` 53 | 54 | ## 3.1.4 55 | 56 | * Always set the `deltaY` 57 | * Add back in the `deltaX` and `deltaY` support for older Firefox versions 58 | 59 | ## 3.1.3 60 | 61 | * Include `MozMousePixelScroll` in the to fix list to avoid inconsistent behavior in older Firefox 62 | 63 | ## 3.1.2 64 | 65 | * Include grunt utilities for development purposes (jshint and uglify) 66 | * Include support for browserify 67 | * Some basic cleaning up 68 | 69 | ## 3.1.1 70 | 71 | * Fix rounding issue with deltas less than zero 72 | 73 | 74 | ## 3.1.0 75 | 76 | * Fix Firefox 17+ issues by using new wheel event 77 | * Normalize delta values 78 | * Adds horizontal support for IE 9+ by using new wheel event 79 | * Support AMD loaders 80 | 81 | 82 | ## 3.0.6 83 | 84 | * Fix issue with delta being 0 in Firefox 85 | 86 | 87 | ## 3.0.5 88 | 89 | * jQuery 1.7 compatibility 90 | 91 | 92 | ## 3.0.4 93 | 94 | * Fix IE issue 95 | 96 | 97 | ## 3.0.3 98 | 99 | * Added `deltaX` and `deltaY` for horizontal scrolling support (Thanks to Seamus Leahy) 100 | 101 | 102 | ## 3.0.2 103 | 104 | * Fixed delta being opposite value in latest Opera 105 | * No longer fix `pageX`, `pageY` for older Mozilla browsers 106 | * Removed browser detection 107 | * Cleaned up the code 108 | 109 | 110 | ## 3.0.1 111 | 112 | * Bad release... creating a new release due to plugins.jquery.com issue :( 113 | 114 | 115 | ## 3.0 116 | 117 | * Uses new special events API in jQuery 1.2.2+ 118 | * You can now treat `mousewheel` as a normal event and use `.bind`, `.unbind` and `.trigger` 119 | * Using jQuery.data API for expandos 120 | 121 | 122 | ## 2.2 123 | 124 | * Fixed `pageX`, `pageY`, `clientX` and `clientY` event properties for Mozilla based browsers 125 | 126 | 127 | ## 2.1.1 128 | 129 | * Updated to work with jQuery 1.1.3 130 | * Used one instead of bind to do unload event for clean up 131 | 132 | 133 | ## 2.1 134 | 135 | * Fixed an issue with the unload handler 136 | 137 | 138 | ## 2.0 139 | 140 | * Major reduction in code size and complexity (internals have change a whole lot) 141 | 142 | 143 | ## 1.0 144 | 145 | * Fixed Opera issue 146 | * Fixed an issue with children elements that also have a mousewheel handler 147 | * Added ability to handle multiple handlers 148 | -------------------------------------------------------------------------------- /test/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Testing mousewheel plugin 6 | 7 | 97 | 98 | 110 | 205 | 206 | 207 | 208 |

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238 | 239 | 240 | -------------------------------------------------------------------------------- /jquery.mousewheel.js: -------------------------------------------------------------------------------- 1 | /*! 2 | * jQuery Mousewheel 3.1.13 3 | * 4 | * Copyright jQuery Foundation and other contributors 5 | * Released under the MIT license 6 | * http://jquery.org/license 7 | */ 8 | 9 | (function (factory) { 10 | if ( typeof define === 'function' && define.amd ) { 11 | // AMD. Register as an anonymous module. 12 | define(['jquery'], factory); 13 | } else if (typeof exports === 'object') { 14 | // Node/CommonJS style for Browserify 15 | module.exports = factory; 16 | } else { 17 | // Browser globals 18 | factory(jQuery); 19 | } 20 | }(function ($) { 21 | 22 | var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll', 'MozMousePixelScroll'], 23 | toBind = ( 'onwheel' in document || document.documentMode >= 9 ) ? 24 | ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll'], 25 | slice = Array.prototype.slice, 26 | nullLowestDeltaTimeout, lowestDelta; 27 | 28 | if ( $.event.fixHooks ) { 29 | for ( var i = toFix.length; i; ) { 30 | $.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks; 31 | } 32 | } 33 | 34 | var special = $.event.special.mousewheel = { 35 | version: '3.1.12', 36 | 37 | setup: function() { 38 | if ( this.addEventListener ) { 39 | for ( var i = toBind.length; i; ) { 40 | this.addEventListener( toBind[--i], handler, false ); 41 | } 42 | } else { 43 | this.onmousewheel = handler; 44 | } 45 | // Store the line height and page height for this particular element 46 | $.data(this, 'mousewheel-line-height', special.getLineHeight(this)); 47 | $.data(this, 'mousewheel-page-height', special.getPageHeight(this)); 48 | }, 49 | 50 | teardown: function() { 51 | if ( this.removeEventListener ) { 52 | for ( var i = toBind.length; i; ) { 53 | this.removeEventListener( toBind[--i], handler, false ); 54 | } 55 | } else { 56 | this.onmousewheel = null; 57 | } 58 | // Clean up the data we added to the element 59 | $.removeData(this, 'mousewheel-line-height'); 60 | $.removeData(this, 'mousewheel-page-height'); 61 | }, 62 | 63 | getLineHeight: function(elem) { 64 | var $elem = $(elem), 65 | $parent = $elem['offsetParent' in $.fn ? 'offsetParent' : 'parent'](); 66 | if (!$parent.length) { 67 | $parent = $('body'); 68 | } 69 | return parseInt($parent.css('fontSize'), 10) || parseInt($elem.css('fontSize'), 10) || 16; 70 | }, 71 | 72 | getPageHeight: function(elem) { 73 | return $(elem).height(); 74 | }, 75 | 76 | settings: { 77 | adjustOldDeltas: true, // see shouldAdjustOldDeltas() below 78 | normalizeOffset: true // calls getBoundingClientRect for each event 79 | } 80 | }; 81 | 82 | $.fn.extend({ 83 | mousewheel: function(fn) { 84 | return fn ? this.bind('mousewheel', fn) : this.trigger('mousewheel'); 85 | }, 86 | 87 | unmousewheel: function(fn) { 88 | return this.unbind('mousewheel', fn); 89 | } 90 | }); 91 | 92 | 93 | function handler(event) { 94 | var orgEvent = event || window.event, 95 | args = slice.call(arguments, 1), 96 | delta = 0, 97 | deltaX = 0, 98 | deltaY = 0, 99 | absDelta = 0, 100 | offsetX = 0, 101 | offsetY = 0; 102 | event = $.event.fix(orgEvent); 103 | event.type = 'mousewheel'; 104 | 105 | // Old school scrollwheel delta 106 | if ( 'detail' in orgEvent ) { deltaY = orgEvent.detail * -1; } 107 | if ( 'wheelDelta' in orgEvent ) { deltaY = orgEvent.wheelDelta; } 108 | if ( 'wheelDeltaY' in orgEvent ) { deltaY = orgEvent.wheelDeltaY; } 109 | if ( 'wheelDeltaX' in orgEvent ) { deltaX = orgEvent.wheelDeltaX * -1; } 110 | 111 | // Firefox < 17 horizontal scrolling related to DOMMouseScroll event 112 | if ( 'axis' in orgEvent && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) { 113 | deltaX = deltaY * -1; 114 | deltaY = 0; 115 | } 116 | 117 | // Set delta to be deltaY or deltaX if deltaY is 0 for backwards compatabilitiy 118 | delta = deltaY === 0 ? deltaX : deltaY; 119 | 120 | // New school wheel delta (wheel event) 121 | if ( 'deltaY' in orgEvent ) { 122 | deltaY = orgEvent.deltaY * -1; 123 | delta = deltaY; 124 | } 125 | if ( 'deltaX' in orgEvent ) { 126 | deltaX = orgEvent.deltaX; 127 | if ( deltaY === 0 ) { delta = deltaX * -1; } 128 | } 129 | 130 | // No change actually happened, no reason to go any further 131 | if ( deltaY === 0 && deltaX === 0 ) { return; } 132 | 133 | // Need to convert lines and pages to pixels if we aren't already in pixels 134 | // There are three delta modes: 135 | // * deltaMode 0 is by pixels, nothing to do 136 | // * deltaMode 1 is by lines 137 | // * deltaMode 2 is by pages 138 | if ( orgEvent.deltaMode === 1 ) { 139 | var lineHeight = $.data(this, 'mousewheel-line-height'); 140 | delta *= lineHeight; 141 | deltaY *= lineHeight; 142 | deltaX *= lineHeight; 143 | } else if ( orgEvent.deltaMode === 2 ) { 144 | var pageHeight = $.data(this, 'mousewheel-page-height'); 145 | delta *= pageHeight; 146 | deltaY *= pageHeight; 147 | deltaX *= pageHeight; 148 | } 149 | 150 | // Store lowest absolute delta to normalize the delta values 151 | absDelta = Math.max( Math.abs(deltaY), Math.abs(deltaX) ); 152 | 153 | if ( !lowestDelta || absDelta < lowestDelta ) { 154 | lowestDelta = absDelta; 155 | 156 | // Adjust older deltas if necessary 157 | if ( shouldAdjustOldDeltas(orgEvent, absDelta) ) { 158 | lowestDelta /= 40; 159 | } 160 | } 161 | 162 | // Adjust older deltas if necessary 163 | if ( shouldAdjustOldDeltas(orgEvent, absDelta) ) { 164 | // Divide all the things by 40! 165 | delta /= 40; 166 | deltaX /= 40; 167 | deltaY /= 40; 168 | } 169 | 170 | // Get a whole, normalized value for the deltas 171 | delta = Math[ delta >= 1 ? 'floor' : 'ceil' ](delta / lowestDelta); 172 | deltaX = Math[ deltaX >= 1 ? 'floor' : 'ceil' ](deltaX / lowestDelta); 173 | deltaY = Math[ deltaY >= 1 ? 'floor' : 'ceil' ](deltaY / lowestDelta); 174 | 175 | // Normalise offsetX and offsetY properties 176 | if ( special.settings.normalizeOffset && this.getBoundingClientRect ) { 177 | var boundingRect = this.getBoundingClientRect(); 178 | offsetX = event.clientX - boundingRect.left; 179 | offsetY = event.clientY - boundingRect.top; 180 | } 181 | 182 | // Add information to the event object 183 | event.deltaX = deltaX; 184 | event.deltaY = deltaY; 185 | event.deltaFactor = lowestDelta; 186 | event.offsetX = offsetX; 187 | event.offsetY = offsetY; 188 | // Go ahead and set deltaMode to 0 since we converted to pixels 189 | // Although this is a little odd since we overwrite the deltaX/Y 190 | // properties with normalized deltas. 191 | event.deltaMode = 0; 192 | 193 | // Add event and delta to the front of the arguments 194 | args.unshift(event, delta, deltaX, deltaY); 195 | 196 | // Clearout lowestDelta after sometime to better 197 | // handle multiple device types that give different 198 | // a different lowestDelta 199 | // Ex: trackpad = 3 and mouse wheel = 120 200 | if (nullLowestDeltaTimeout) { clearTimeout(nullLowestDeltaTimeout); } 201 | nullLowestDeltaTimeout = setTimeout(nullLowestDelta, 200); 202 | 203 | return ($.event.dispatch || $.event.handle).apply(this, args); 204 | } 205 | 206 | function nullLowestDelta() { 207 | lowestDelta = null; 208 | } 209 | 210 | function shouldAdjustOldDeltas(orgEvent, absDelta) { 211 | // If this is an older event and the delta is divisable by 120, 212 | // then we are assuming that the browser is treating this as an 213 | // older mouse wheel event and that we should divide the deltas 214 | // by 40 to try and get a more usable deltaFactor. 215 | // Side note, this actually impacts the reported scroll distance 216 | // in older browsers and can cause scrolling to be slower than native. 217 | // Turn this off by setting $.event.special.mousewheel.settings.adjustOldDeltas to false. 218 | return special.settings.adjustOldDeltas && orgEvent.type === 'mousewheel' && absDelta % 120 === 0; 219 | } 220 | 221 | })); 222 | --------------------------------------------------------------------------------