Edit File - hoverIntent.js

(function($){

/* hoverIntent by Brian Cherne */

$.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);

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