// MooTools: the javascript framework.
// Load this file's selection again by visiting: http://mootools.net/more/2d0865828747ba40e0fc828f9e5a831f 
// Or build this file again with packager using: packager build More/More More/Scroller
/*
---
copyrights:
  - [MooTools](http://mootools.net)

licenses:
  - [MIT License](http://mootools.net/license.txt)
...
*/
MooTools.More={version:"1.3.2.1",build:"e586bcd2496e9b22acfde32e12f84d49ce09e59d"};var Scroller=new Class({Implements:[Events,Options],options:{area:20,velocity:1,onChange:function(a,b){this.element.scrollTo(a,b);
},fps:50},initialize:function(b,a){this.setOptions(a);this.element=document.id(b);this.docBody=document.id(this.element.getDocument().body);this.listener=(typeOf(this.element)!="element")?this.docBody:this.element;
this.timer=null;this.bound={attach:this.attach.bind(this),detach:this.detach.bind(this),getCoords:this.getCoords.bind(this)};},start:function(){this.listener.addEvents({mouseover:this.bound.attach,mouseleave:this.bound.detach});
return this;},stop:function(){this.listener.removeEvents({mouseover:this.bound.attach,mouseleave:this.bound.detach});this.detach();this.timer=clearInterval(this.timer);
return this;},attach:function(){this.listener.addEvent("mousemove",this.bound.getCoords);},detach:function(){this.listener.removeEvent("mousemove",this.bound.getCoords);
this.timer=clearInterval(this.timer);},getCoords:function(a){this.page=(this.listener.get("tag")=="body")?a.client:a.page;if(!this.timer){this.timer=this.scroll.periodical(Math.round(1000/this.options.fps),this);
}},scroll:function(){var c=this.element.getSize(),a=this.element.getScroll(),h=this.element!=this.docBody?this.element.getOffsets():{x:0,y:0},d=this.element.getScrollSize(),g={x:0,y:0},e=this.options.area.top||this.options.area,b=this.options.area.bottom||this.options.area;
for(var f in this.page){if(this.page[f]<(e+h[f])&&a[f]!=0){g[f]=(this.page[f]-e-h[f])*this.options.velocity;}else{if(this.page[f]+b>(c[f]+h[f])&&a[f]+c[f]!=d[f]){g[f]=(this.page[f]-c[f]+b-h[f])*this.options.velocity;
}}g[f]=g[f].round();}if(g.y||g.x){this.fireEvent("change",[a.x+g.x,a.y+g.y]);}}});