• 鼠标移动延迟 hoverIntent.js使用


    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    <html xmlns="http://www.w3.org/1999/xhtml">

    <head>

    <title>仿Flash的jquery横向滑动菜单_网页代码站</title>

    <script type="text/javascript" src="themes/script/jquery.js"></script>

    <script type="text/javascript">

    (
    function($) {

        $.fn.hoverIntent 
    = function(f,g) {

            
    // default configuration options

            
    var cfg = {

                sensitivity: 
    7,

                interval: 
    100,

                timeout: 
    0

            };

            
    // override configuration options with user supplied object

            cfg 
    = $.extend(cfg, g ? { over: f, out: g } : f );

            
    // instantiate variables

            
    // cX, cY = current X and Y position of mouse, updated by mousemove event

            
    // pX, pY = previous X and Y position of mouse, set by mouseover and polling interval

            
    var cX, cY, pX, pY;

            
    // A private function for getting mouse position

            
    var track = function(ev) {

                cX 
    = ev.pageX;

                cY 
    = ev.pageY;

            };

            
    // A private function for comparing current and previous mouse position

            
    var compare = function(ev,ob) {

                ob.hoverIntent_t 
    = clearTimeout(ob.hoverIntent_t);

                
    // compare mouse positions to see if they've crossed the threshold

                
    if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {

                    $(ob).unbind(
    "mousemove",track);

                    
    // set hoverIntent state to true (so mouseOut can be called)

                    ob.hoverIntent_s 
    = 1;

                    
    return cfg.over.apply(ob,[ev]);

                } 
    else {

                    
    // set previous coordinates for next time

                    pX 
    = cX; pY = cY;

                    
    // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)

                    ob.hoverIntent_t 
    = setTimeout( function(){compare(ev, ob);} , cfg.interval );

                }

            };

            
    // A private function for delaying the mouseOut function

            
    var delay = function(ev,ob) {

                ob.hoverIntent_t 
    = clearTimeout(ob.hoverIntent_t);

                ob.hoverIntent_s 
    = 0;

                
    return cfg.out.apply(ob,[ev]);

            };

            
    // A private function for handling mouse 'hovering'

            
    var handleHover = function(e) {

                
    // next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut

                
    var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;

                
    while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }

                
    if ( p == this ) { return false; }

                
    // copy objects to be passed into t (required for event object to be passed in IE)

                
    var ev = jQuery.extend({},e);

                
    var ob = this;

                
    // cancel hoverIntent timer if it exists

                
    if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }

                
    // else e.type == "onmouseover"

                
    if (e.type == "mouseover") {

                    
    // set "previous" X and Y position based on initial entry point

                    pX 
    = ev.pageX; pY = ev.pageY;

                    
    // update "current" X and Y position based on mousemove

                    $(ob).bind(
    "mousemove",track);

                    
    // start polling interval (self-calling timeout) to compare mouse coordinates over time

                    
    if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}

                
    // else e.type == "onmouseout"

                } 
    else {

                    
    // unbind expensive mousemove event

                    $(ob).unbind(
    "mousemove",track);

                    
    // if hoverIntent state is true, then call the mouseOut function after the specified delay

                    
    if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}

                }

            };

            
    // bind the function to the two event listeners

            
    return this.mouseover(handleHover).mouseout(handleHover);

        };

    })(jQuery);

    </script>

    <script language="javascript">

    $(
    function(){

                hiConfig 
    = {

                            sensitivity: 
    1,

                            interval: 
    100

                            timeout: 
    100

                            over: 
    function() {

                                
    var x=$(this).offset().left-$("#menu_bar ul").offset().left;

                                $(
    "#menu_bar span").animate({left:x+"px",top:'0px'},300);                       

            }, 
    // function = onMouseOver callback (REQUIRED)

            out: 
    function() {} // function = onMouseOut callback (REQUIRED)

            }

                $(
    "#menu_bar li").hoverIntent(hiConfig)

    })

    </script>

    <style>

    body
    {text-align:center;font-size:12px;color:#333;font-family:"宋体";background:#fff;margin:0 auto;padding:0;}

    body > div
    {text-align:center;margin-right:auto;margin-left:auto;}

    div,form,ul,ol,li,span,p,dt,dd,dl
    {border:0;margin:0;padding:0;}

    img,a img
    {border:0;margin:0;padding:0;}

    h1,h2,h3,h4,h5,h6
    {font-size:12px;font-weight:400;margin:0;padding:0;}

    ul,ol,li
    {list-style:none;}

    td
    {word-break:break-all;}

    a
    {color:#003cc8;text-decoration:none;}

    a:hover
    {text-decoration:underline;color:blue;}

    .f_tahoma
    {font-family:Tahoma;}

    em,i
    {font-style:normal;}

    #menu_bar
    {widtH:600px;margin:0 auto;background:#000066; position:relative;height:30px;border:1px solid #CCCCCC}

    #menu_bar ul
    {height:30px;overflow:hidden; position:absolute;z-index:2;left:0px;top:0px;line-height:30px;}

    #menu_bar li
    {width:100px;float:left;text-align:center;font-size:14px;font-weight:bold}

    #menu_bar li a
    {color:#fff}

    #menu_bar li a:hover
    {color:#ff7800}

    #menu_bar span
    {display:block;position:absolute;background:#fff;filter: alpha(Opacity=40);opacity: 0.4;-moz-opacity: 0.4;-khtml-opacity: 0.4;width:100px;z-

    index
    :1;height:30px;left:0px;top:0px;}

    </style>

    </head>

    <body>

    <div id="menu_bar">

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  • 原文地址:https://www.cnblogs.com/hejunrex/p/2199829.html
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