[2] | 1 | /*! Copyright (c) 2009 Brandon Aaron (http://brandonaaron.net) |
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| 2 | * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) |
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| 3 | * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. |
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| 4 | * Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers. |
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| 5 | * Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix. |
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| 6 | * |
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| 7 | * Version: 3.0.2 |
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| 8 | * |
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| 9 | * Requires: 1.2.2+ |
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| 10 | */ |
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| 11 | |
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| 12 | (function($) { |
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| 13 | |
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| 14 | var types = ['DOMMouseScroll', 'mousewheel']; |
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| 15 | |
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| 16 | $.event.special.mousewheel = { |
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| 17 | setup: function() { |
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| 18 | if ( this.addEventListener ) |
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| 19 | for ( var i=types.length; i; ) |
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| 20 | this.addEventListener( types[--i], handler, false ); |
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| 21 | else |
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| 22 | this.onmousewheel = handler; |
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| 23 | }, |
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| 24 | |
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| 25 | teardown: function() { |
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| 26 | if ( this.removeEventListener ) |
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| 27 | for ( var i=types.length; i; ) |
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| 28 | this.removeEventListener( types[--i], handler, false ); |
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| 29 | else |
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| 30 | this.onmousewheel = null; |
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| 31 | } |
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| 32 | }; |
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| 33 | |
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| 34 | $.fn.extend({ |
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| 35 | mousewheel: function(fn) { |
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| 36 | return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel"); |
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| 37 | }, |
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| 38 | |
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| 39 | unmousewheel: function(fn) { |
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| 40 | return this.unbind("mousewheel", fn); |
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| 41 | } |
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| 42 | }); |
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| 43 | |
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| 44 | |
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| 45 | function handler(event) { |
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| 46 | var args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true; |
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| 47 | |
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| 48 | event = $.event.fix(event || window.event); |
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| 49 | event.type = "mousewheel"; |
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| 50 | |
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| 51 | if ( event.wheelDelta ) delta = event.wheelDelta/120; |
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| 52 | if ( event.detail ) delta = -event.detail/3; |
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| 53 | |
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| 54 | // Add events and delta to the front of the arguments |
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| 55 | args.unshift(event, delta); |
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| 56 | |
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| 57 | return $.event.handle.apply(this, args); |
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| 58 | } |
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| 59 | |
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| 60 | })(jQuery); |
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