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13 | (function ($) {
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14 |
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15 | var types = ['DOMMouseScroll', 'mousewheel'];
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16 |
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17 | if ($.event.fixHooks) {
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18 | for (var i = types.length; i;) {
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19 | $.event.fixHooks[ types[--i] ] = $.event.mouseHooks;
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20 | }
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21 | }
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22 |
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23 | $.event.special.mousewheel = {
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24 | setup: function () {
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25 | if (this.addEventListener) {
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26 | for (var i = types.length; i;) {
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27 | this.addEventListener(types[--i], handler, false);
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28 | }
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29 | } else {
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30 | this.onmousewheel = handler;
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31 | }
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32 | },
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33 |
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34 | teardown: function () {
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35 | if (this.removeEventListener) {
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36 | for (var i = types.length; i;) {
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37 | this.removeEventListener(types[--i], handler, false);
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38 | }
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39 | } else {
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40 | this.onmousewheel = null;
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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 | $.fn.extend({
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46 | mousewheel: function (fn) {
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47 | return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
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48 | },
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49 |
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50 | unmousewheel: function (fn) {
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51 | return this.unbind("mousewheel", fn);
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52 | }
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53 | });
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54 |
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55 |
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56 | function handler(event) {
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57 | var orgEvent = event || window.event, args = [].slice.call(arguments, 1), delta = 0, returnValue = true, deltaX = 0, deltaY = 0;
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58 | event = $.event.fix(orgEvent);
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59 | event.type = "mousewheel";
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60 |
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61 |
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62 | if (orgEvent.wheelDelta) {
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63 | delta = orgEvent.wheelDelta / 120;
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64 | }
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65 | if (orgEvent.detail) {
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66 | delta = -orgEvent.detail / 3;
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67 | }
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68 |
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69 |
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70 | deltaY = delta;
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71 |
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72 |
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73 | if (orgEvent.axis !== undefined && orgEvent.axis === orgEvent.HORIZONTAL_AXIS) {
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74 | deltaY = 0;
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75 | deltaX = -1 * delta;
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76 | }
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77 |
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78 |
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79 | if (orgEvent.wheelDeltaY !== undefined) {
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80 | deltaY = orgEvent.wheelDeltaY / 120;
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81 | }
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82 | if (orgEvent.wheelDeltaX !== undefined) {
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83 | deltaX = -1 * orgEvent.wheelDeltaX / 120;
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84 | }
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85 |
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86 |
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87 | args.unshift(event, delta, deltaX, deltaY);
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88 |
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89 | return ($.event.dispatch || $.event.handle).apply(this, args);
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90 | }
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91 |
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92 | })(jQuery);
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