Adding template from http://www.freehtml5templates.com/adropabove-html5-css3-and...

[treecutter.git] / style / adropabove / js / hoverIntent.js

diff --git a/style/adropabove/js/hoverIntent.js b/style/adropabove/js/hoverIntent.js
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+++ b/style/adropabove/js/hoverIntent.js
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+(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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