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Thread: Auto ScrollTo nearest container

  1. #1
    Join Date
    May 2010
    Posts
    4

    Auto ScrollTo nearest container

    I'm having a bit of a problem with a site I'm building.
    I want an effect that if your in between 2 div's it will auto scroll after the mouse has been stationary for approx. 2 seconds.
    An example of this effect can be found on this site which uses ScrollTo.js to create the effect.

    My site uses the same layout with each div container been 1000px. I can use scrollTo.js to click a link to take me too a container, but I want it to detect if its not at the top of a div and scroll to the closest one.

    Any information to point me in the correct direction would be greatfully appreciated.

    Thanks in advance
    J

  2. #2
    Join Date
    May 2010
    Posts
    4

  3. #3
    Join Date
    Jun 2004
    Location
    Portsmouth UK
    Posts
    2,709
    Code:
    <!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" xml:lang="en" lang="en">
    
    <head>
      <title></title>
    <style type="text/css">
    /*<![CDATA[*/
    
    .anchor {
      width:100px;height:1000px;background-Color:red;
    }
    
    /*]]>*/
    </style>
    
    <script type="text/javascript">
    /*<![CDATA[*/
    // Scroll to Anchor. (26=October-2012)
    // by Vic Phillips - http://www.vicsjavascripts.org.uk/
    
    function zxcScrollTo(o){
     var ms=o.ScrollDuration,hold=o.ScrollHold,ms=typeof(ms)=='number'?ms:1000,reg=new RegExp('\\W'+o.AnchorClass+'\\W'),els=document.getElementsByTagName('*'),ary=[],z0=0;
     for (;z0<els.length;z0++){
      if(reg.test(' '+els[z0].className+' ')){
       ary.push(els[z0]);
      }
     }
     this.ary=ary
     this.ms=ms;
     this.hold=(typeof(hold)=='number'?hold:ms*4)+ms;
     this.nu=-1;
     this.set()
     this.addevt(document,'mousemove','set');
    }
    
    zxcScrollTo.prototype={
    
     set:function(){
      var o=this;
      clearTimeout(o.to);
      o.to=setTimeout(function(){ o.scroll(); },o.hold)
     },
    
     scroll:function(){
      var o=this,top=o.wwhs()[3],max=20000,nu,to,ms,z0=0;
      for (;z0<o.ary.length;z0++){
       if (Math.abs(top-o.pos(o.ary[z0]))<max){
        nu=z0;
       }
       max=Math.abs(top-o.pos(o.ary[z0]));
      }
      to=o.pos(o.ary[nu])
      ms=o.ms*Math.abs((to-top)/o.wwhs()[1])
      clearTimeout(o.dly);
      o.animate(top,o.pos(o.ary[nu]),new Date(),ms,Math.PI/(2*ms));
     },
    
     wwhs:function(){
      if (window.innerHeight) return [window.innerWidth-10,window.innerHeight-10,window.pageXOffset,window.pageYOffset];
      else if (document.documentElement.clientHeight) return [document.documentElement.clientWidth-10,document.documentElement.clientHeight-10,document.documentElement.scrollLeft,document.documentElement.scrollTop];
      return [document.body.clientWidth,document.body.clientHeight,document.body.scrollLeft,document.body.scrollTop];
     },
    
     animate:function(f,t,srt,mS,i){
      var o=this,ms=new Date().getTime()-srt,now=Math.floor((t-f)*Math.sin(i*ms)+f),now1=(t-f)/mS*ms+f;
      if (isFinite(now)){
       window.scrollTo(0,now);
      }
      if (ms<mS){
       o.dly=setTimeout(function(){ o.animate(f,t,srt,mS,i); },10);
      }
      else {
       window.scrollTo(0,t);
      }
     },
    
     pos:function(obj){
      var rtn=0;
      while(obj){
       rtn+=obj.offsetTop;
       obj=obj.offsetParent;
      }
      return rtn;
     },
    
     addevt:function(o,t,f,p){
      var oop=this;
      if (o.addEventListener) o.addEventListener(t,function(e){ return oop[f](e,p);}, false);
      else if (o.attachEvent) o.attachEvent('on'+t,function(e){ return oop[f](e,p); });
     }
    
    
    }
    
    
    /*]]>*/
    </script>
    <script type="text/javascript">
    /*<![CDATA[*/
    
    function Init(){
     new zxcScrollTo({
      AnchorClass:'anchor',
      ScrollDuration:1000,
      ScrollHold:4000
     });
    }
    
    if (window.addEventListener){
     window.addEventListener('load',Init, false);
    }
    else if (window.attachEvent){
     window.attachEvent('onload',Init);
    }
    
    /*]]>*/
    </script>
    
    </head>
    
    <body>
    
    <div class="anchor" ></div>
    <div class="anchor" style="background-Color:blue;" ></div>
    <div class="anchor" style="background-Color:green;" ></div>
    
    </body>
    
    </html>
    Vic

    God loves you and will never love you less.

    http://www.vicsjavascripts.org/Home.htm
    If my post has been useful please donate to http://www.operationsmile.org.uk/

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HTML5 Development Center

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