Created
December 8, 2011 10:11
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mousewheel 事件
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/*! Copyright (c) 2011 Brandon Aaron (http://brandonaaron.net) | |
* Licensed under the MIT License (LICENSE.txt). | |
* | |
* Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers. | |
* Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix. | |
* Thanks to: Seamus Leahy for adding deltaX and deltaY | |
* | |
* Version: 3.0.6 | |
* | |
* Requires: 1.2.2+ | |
*/ | |
(function($) { | |
var types = ['DOMMouseScroll', 'mousewheel']; | |
if ($.event.fixHooks) { | |
for ( var i=types.length; i; ) { | |
$.event.fixHooks[ types[--i] ] = $.event.mouseHooks; | |
} | |
} | |
$.event.special.mousewheel = { | |
setup: function() { | |
if ( this.addEventListener ) { | |
for ( var i=types.length; i; ) { | |
this.addEventListener( types[--i], handler, false ); | |
} | |
} else { | |
this.onmousewheel = handler; | |
} | |
}, | |
teardown: function() { | |
if ( this.removeEventListener ) { | |
for ( var i=types.length; i; ) { | |
this.removeEventListener( types[--i], handler, false ); | |
} | |
} else { | |
this.onmousewheel = null; | |
} | |
} | |
}; | |
$.fn.extend({ | |
mousewheel: function(fn) { | |
return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel"); | |
}, | |
unmousewheel: function(fn) { | |
return this.unbind("mousewheel", fn); | |
} | |
}); | |
function handler(event) { | |
var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true, deltaX = 0, deltaY = 0; | |
event = $.event.fix(orgEvent); | |
event.type = "mousewheel"; | |
// Old school scrollwheel delta | |
if ( orgEvent.wheelDelta ) { delta = orgEvent.wheelDelta/120; } | |
if ( orgEvent.detail ) { delta = -orgEvent.detail/3; } | |
// New school multidimensional scroll (touchpads) deltas | |
deltaY = delta; | |
// Gecko | |
if ( orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS ) { | |
deltaY = 0; | |
deltaX = -1*delta; | |
} | |
// Webkit | |
if ( orgEvent.wheelDeltaY !== undefined ) { deltaY = orgEvent.wheelDeltaY/120; } | |
if ( orgEvent.wheelDeltaX !== undefined ) { deltaX = -1*orgEvent.wheelDeltaX/120; } | |
// Add event and delta to the front of the arguments | |
args.unshift(event, delta, deltaX, deltaY); | |
return ($.event.dispatch || $.event.handle).apply(this, args); | |
} | |
})(jQuery); | |
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