1 |
torben |
2125 |
/*! Copyright (c) 2013 Brandon Aaron (http://brandonaaron.net) |
2 |
|
|
* Licensed under the MIT License (LICENSE.txt). |
3 |
|
|
* |
4 |
|
|
* Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers. |
5 |
|
|
* Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix. |
6 |
|
|
* Thanks to: Seamus Leahy for adding deltaX and deltaY |
7 |
|
|
* |
8 |
|
|
* Version: 3.1.0 |
9 |
|
|
* |
10 |
|
|
* Requires: 1.2.2+ |
11 |
|
|
*/ |
12 |
|
|
|
13 |
|
|
(function (factory) { |
14 |
|
|
if (typeof define === 'function' && define.amd) { |
15 |
|
|
// AMD. Register as an anonymous module. |
16 |
|
|
define(['jquery'], factory); |
17 |
|
|
} else { |
18 |
|
|
// Browser globals |
19 |
|
|
factory(jQuery); |
20 |
|
|
} |
21 |
|
|
}(function ($) { |
22 |
|
|
|
23 |
|
|
var toFix = ['wheel', 'mousewheel', 'DOMMouseScroll']; |
24 |
|
|
var toBind = 'onwheel' in document || document.documentMode >= 9 ? ['wheel'] : ['mousewheel', 'DomMouseScroll', 'MozMousePixelScroll']; |
25 |
|
|
var lowestDelta, lowestDeltaXY; |
26 |
|
|
|
27 |
|
|
if ($.event.fixHooks) { |
28 |
|
|
for ( var i=toFix.length; i; ) { |
29 |
|
|
$.event.fixHooks[ toFix[--i] ] = $.event.mouseHooks; |
30 |
|
|
} |
31 |
|
|
} |
32 |
|
|
|
33 |
|
|
$.event.special.mousewheel = { |
34 |
|
|
setup: function() { |
35 |
|
|
if ( this.addEventListener ) { |
36 |
|
|
for ( var i=toBind.length; i; ) { |
37 |
|
|
this.addEventListener( toBind[--i], handler, false ); |
38 |
|
|
} |
39 |
|
|
} else { |
40 |
|
|
this.onmousewheel = handler; |
41 |
|
|
} |
42 |
|
|
}, |
43 |
|
|
|
44 |
|
|
teardown: function() { |
45 |
|
|
if ( this.removeEventListener ) { |
46 |
|
|
for ( var i=toBind.length; i; ) { |
47 |
|
|
this.removeEventListener( toBind[--i], handler, false ); |
48 |
|
|
} |
49 |
|
|
} else { |
50 |
|
|
this.onmousewheel = null; |
51 |
|
|
} |
52 |
|
|
} |
53 |
|
|
}; |
54 |
|
|
|
55 |
|
|
$.fn.extend({ |
56 |
|
|
mousewheel: function(fn) { |
57 |
|
|
return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel"); |
58 |
|
|
}, |
59 |
|
|
|
60 |
|
|
unmousewheel: function(fn) { |
61 |
|
|
return this.unbind("mousewheel", fn); |
62 |
|
|
} |
63 |
|
|
}); |
64 |
|
|
|
65 |
|
|
|
66 |
|
|
function handler(event) { |
67 |
|
|
var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, deltaX = 0, deltaY = 0, absDelta = 0, absDeltaXY = 0; |
68 |
|
|
event = $.event.fix(orgEvent); |
69 |
|
|
event.type = "mousewheel"; |
70 |
|
|
|
71 |
|
|
// Old school scrollwheel delta |
72 |
|
|
if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta; } |
73 |
|
|
if ( orgEvent.detail ) { delta = orgEvent.detail * -1; } |
74 |
|
|
|
75 |
|
|
// New school wheel delta (wheel event) |
76 |
|
|
if ( orgEvent.deltaY ) { |
77 |
|
|
deltaY = orgEvent.deltaY * -1; |
78 |
|
|
delta = deltaY; |
79 |
|
|
} |
80 |
|
|
if ( orgEvent.deltaX ) { |
81 |
|
|
deltaX = orgEvent.deltaX; |
82 |
|
|
delta = deltaX * -1; |
83 |
|
|
} |
84 |
|
|
|
85 |
|
|
// Webkit |
86 |
|
|
if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY; } |
87 |
|
|
if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = orgEvent.wheelDeltaX * -1; } |
88 |
|
|
|
89 |
|
|
absDelta = Math.abs(delta); |
90 |
|
|
if ( !lowestDelta || absDelta < lowestDelta ) { lowestDelta = absDelta; } |
91 |
|
|
|
92 |
|
|
absDeltaXY = Math.max( Math.abs(deltaY), Math.abs(deltaX) ); |
93 |
|
|
if ( !lowestDeltaXY || absDeltaXY < lowestDeltaXY ) { lowestDeltaXY = absDeltaXY; } |
94 |
|
|
|
95 |
|
|
// Add event and delta to the front of the arguments |
96 |
|
|
args.unshift(event, Math.floor(delta/lowestDelta), Math.floor(deltaX/lowestDeltaXY), Math.floor(deltaY/lowestDeltaXY)); |
97 |
|
|
|
98 |
|
|
return ($.event.dispatch || $.event.handle).apply(this, args); |
99 |
|
|
} |
100 |
|
|
|
101 |
|
|
})); |