1 | ;(function($){ // secure $ jQuery alias
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2 | /*******************************************************************************************/
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3 | // jquery.event.hover.js - rev 5
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4 | // Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)
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5 | // Liscensed under the MIT License (MIT-LICENSE.txt)
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6 | // http://www.opensource.org/licenses/mit-license.php
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7 | // Created: 2008-06-02 | Updated: 2008-07-30
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8 | /*******************************************************************************************/
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9 |
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10 | // USE THESE PROPERTIES TO CUSTOMIZE SETTINGS...
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11 |
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12 | // $.event.special.hover.delay = 100;
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13 | // Defines the delay (msec) while mouse is inside the element before checking the speed
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14 |
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15 | // $.event.special.hover.speed = 100;
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16 | // Defines the maximum speed (px/sec) the mouse may be moving to trigger the hover event
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17 |
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18 | // save the old jquery "hover" method
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19 | $.fn._hover = $.fn.hover;
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20 |
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21 | // jquery method
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22 | $.fn.hover = function( fn1, fn2, fn3 ) {
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23 | if ( fn3 ) this.bind('hoverstart', fn1 ); // 3 args
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24 | if ( fn2 ) this.bind('hoverend', fn3 ? fn3 : fn2 ); // 2+ args
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25 | return !fn1 ? this.trigger('hover') // 0 args
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26 | : this.bind('hover', fn3 ? fn2 : fn1 ); // 1+ args
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27 | };
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28 |
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29 | // special event configuration
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30 | var hover = $.event.special.hover = {
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31 | delay: 100, // milliseconds
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32 | speed: 100, // pixels per second
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33 | setup: function( data ){
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34 | data = $.extend({ speed: hover.speed, delay: hover.delay, hovered:0 }, data||{} );
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35 | $.event.add( this, "mouseenter mouseleave", hoverHandler, data );
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36 | },
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37 | teardown: function(){
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38 | $.event.remove( this, "mouseenter mouseleave", hoverHandler );
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39 | }
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40 | };
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41 |
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42 | // shared event handler
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43 | function hoverHandler( event ){
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44 | var data = event.data || event;
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45 | switch ( event.type ){
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46 | case 'mouseenter': // mouseover
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47 | data.dist2 = 0; // init mouse distanceイ
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48 | data.event = event; // store the event
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49 | event.type = "hoverstart"; // hijack event
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50 | if ( $.event.handle.call( this, event ) !== false ){ // handle "hoverstart"
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51 | data.elem = this; // ref to the current element
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52 | $.event.add( this, "mousemove", hoverHandler, data ); // track the mouse
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53 | data.timer = setTimeout( compare, data.delay ); // start async compare
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54 | }
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55 | break;
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56 | case 'mousemove': // track the event, mouse distanceイ = xイ + yイ
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57 | data.dist2 += Math.pow( event.pageX-data.event.pageX, 2 )
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58 | + Math.pow( event.pageY-data.event.pageY, 2 );
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59 | data.event = event; // store current event
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60 | break;
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61 | case 'mouseleave': // mouseout
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62 | clearTimeout( data.timer ); // uncompare
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63 | if ( data.hovered ){
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64 | event.type = "hoverend"; // hijack event
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65 | $.event.handle.call( this, event ); // handle "hoverend"
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66 | data.hovered--; // reset flag
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67 | }
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68 | else $.event.remove( data.elem, "mousemove", hoverHandler ); // untrack
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69 | break;
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70 | default: // timeout compare // distanceイ = xイ + yイ = ( speed * time )イ
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71 | if ( data.dist2 <= Math.pow( data.speed*( data.delay/1e3 ), 2 ) ){ // speed acceptable
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72 | $.event.remove( data.elem, "mousemove", hoverHandler ); // untrack
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73 | data.event.type = "hover"; // hijack event
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74 | if ( $.event.handle.call( data.elem, data.event ) !== false ) // handle "hover"
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75 | data.hovered++; // flag for "hoverend"
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76 | }
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77 | else data.timer = setTimeout( compare, data.delay ); // async recurse
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78 | data.dist2 = 0; // reset distanceイ for next compare
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79 | break;
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80 | }
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81 | function compare(){ hoverHandler( data ); }; // timeout/recursive function
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82 | };
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83 |
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84 | /*******************************************************************************************/
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85 | })(jQuery); // confine scope |
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