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Smooth Horizontal List Scroll

Posted on 2007-03-19
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Last Modified: 2008-02-20
I've been trying to figure out how to do a smooth scrolling horizontal list with javascript for a while now and I just noticed that the EE menu bar does exactly what I am trying to do (when you click the "More" link). Looking through the source code I couldn't really figure out how they were achieving it. Does anybody know how I can do this effect?

Basically I need to be able to scroll through a horizontal list on the push of a button so that new items come into view. Exactly how they do it here on EE.
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Question by:jfredrickson
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5 Comments
 
LVL 75

Expert Comment

by:Michel Plungjan
Comment Utility
Running the risk of getting the standards people on my back:
FF and IE both support the marquee tag
Since it is just html, all things in the marquee are accessible to the browser and to search engines

Here is an alas IE only (unless I can find out how to code onBounce for FF)

<a href="#" onClick="document.getElementById('m1').direction='left'; document.getElementById('m1').start(); return false"><<</a>|
<marquee id="m1" scrollamount="10" onClick="this.stop()" onBounce="this.stop()" behavior="alternate" direction="right" width="75%">
[<a href="">Link01</a>]
[<a href="">Link02</a>]
[<a href="">Link03</a>]
[<a href="">Link04</a>]
[<a href="">Link05</a>]
[<a href="">Link06</a>]
[<a href="">Link07</a>]
[<a href="">Link08</a>]
[<a href="">Link09</a>]
[<a href="">Link10</a>]
[<a href="">Link11</a>]
[<a href="">Link12</a>]
[<a href="">Link13</a>]
[<a href="">Link14</a>]
[<a href="">Link15</a>]
[<a href="">Link16</a>]
[<a href="">Link17</a>]
[<a href="">Link18</a>]
[<a href="">Link19</a>]
[<a href="">Link20</a>]
</marquee>|
<a href="#" onClick="document.getElementById('m1').direction='right'; document.getElementById('m1').start(); return false">>></a>
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Author Comment

by:jfredrickson
Comment Utility
Would it be possible to get something that doesn't bounce around but just sits there like normal and only scrolls when you click the button? I am looking for the exact functionality of the categories menu at the top of the EE page.
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LVL 75

Expert Comment

by:Michel Plungjan
Comment Utility
That is not smooth scrolling it is showing and hiding

function ToggleList(zonePosition)
{
  this.first = document.getElementById('compZnNavF');
  this.second  = document.getElementById('compZnNavL');
  this.cont = document.getElementById('compZnNavCont');
  if(zonePosition == 1)
  {
     this.second.className = 'hide';
     this.first.className = '';
     this.cont.className = 'next';
  }
  else
  {
     this.first.className = 'hide';
     this.second.className = '';
     this.cont.className = '';
  }

  this.toggleNavs = function() {
    if(this.first.className == 'hide')
    {
       this.second.className = 'hide';
       this.first.className = '';
       this.cont.className = 'next';
    }
    else
    {
       this.first.className = 'hide';
       this.second.className = '';
       this.cont.className = '';
    }
  }
}

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LVL 75

Accepted Solution

by:
Michel Plungjan earned 500 total points
Comment Utility
<div id="compZnNav"><a id="compZnNavCont" class="next" onmouseup="toggleList.toggleNavs()"></a><div id="compZnNavCl"><ul id="compZnNavF">

<li class="firstChild" id="r5297"><span class=" root5297"><a href="/Microsoft/"><span>Microsoft</span></a></span></li>
<li class="nCur" id="r5349"><span class=" root5349"><a href="/Apple/"><span>Apple</span></a></span></li>
<li class="nCur" id="r5374"><span class=" root5374"><a href="/Internet/"><span>Internet</span></a></span></li>
<li class="nCur" id="r5624"><span class=" root5624"><a href="/Gamers/"><span>Gamers</span></a></span></li>
<li class="nCur" id="r5375"><span class=" root5375"><a href="/Digital_Living/"><span>Digital Living</span></a></span></li>
<li class="nCur" id="r5377"><span class=" root5377"><a href="/Virus_and_Spyware/"><span>Virus &amp; Spyware</span></a></span></li>
<li class="nCur" id="r5625"><span class=" root5625"><a href="/Hardware/"><span>Hardware</span></a></span></li>
<li class="nCur" id="r3062"><span class=" root3062"><a href="/Software/"><span>Software</span></a></span></li>

<li class="nCur" id="r5379"><span class=" root5379"><a href="/ITPro/"><span>ITPro</span></a></span></li>
<li class="nCur" id="r5380"><span class=" root5380"><a href="/Developer/"><span>Developer</span></a></span></li>
</ul><ul id="compZnNavL"><li class="nCur" id="r5381"><span class=" root5381"><a href="/Storage/"><span>Storage</span></a></span></li>
<li class="nCur" id="r5382"><span class=" root5382"><a href="/OS/"><span>OS</span></a></span></li>
<li class="nCur" id="r5383"><span class=" root5383"><a href="/Database/"><span>Database</span></a></span></li>
<li class="nCur" id="r5384"><span class=" root5384"><a href="/Security/"><span>Security</span></a></span></li>
<li class="current" id="r5628"><span class=" root5628"><a href="/Programming/"><span>Programming</span></a></span></li>
<li class="nCur" id="r5385"><span class=" root5385"><a href="/Web_Development/"><span>Web Development</span></a></span></li>
<li class="nCur" id="r5626"><span class=" root5626"><a href="/Networking/"><span>Networking</span></a></span></li>

<li class="nCur" id="r5627"><span class=" root5627"><a href="/Other/"><span>Other</span></a></span></li>
</ul></div></div>
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LVL 75

Expert Comment

by:Michel Plungjan
Comment Utility
and the stylesheet
#compZnNavCont{float:right;position:relative;margin-right:1px;margin-bottom:10px;background-repeat:no-repeat;width:2%;height:25px;display:block;cursor:pointer;background-image:url(/expert/images/zonePrev.gif);background-position:0 7px;z-index:2}
#compZnNav .next{background-image:url(/expert/images/zoneNext.gif)}
#compZnNav{top:64px;margin:0;position:absolute;width:100%;height:26px;white-space:nowrap;background:url(/expert/images/zoneNav.gif) repeat-x;padding:0}
.IE #compZnNav{position:relative;top:-32px}
#compZnNav UL{margin:0;height:26px;position:relative;clear:none;overflow:hidden}
#compZnNav #compZnNavL{background:url(/expert/images/zoneNav.gif) repeat-x;position:relative;height:26px}
#compZnNav .hide{display:none}
#compZnNav LI{background:url(/expert/images/zoneDivider.gif) 100% 100% no-repeat;display:block;margin:0;float:left;padding:0 1px 0 0;height:26px;width:auto;text-align:center}
#compZnNav LI SPAN{line-height:16px}
#compZnNav #r5297{width:10%}
#compZnNav #r5349{width:8%}
#compZnNav #r5374{width:10%}
#compZnNav #r5624{width:9%}
#compZnNav #r5375{width:12%}
#compZnNav #r5377{width:14%}
#compZnNav #r5625{width:9%}
#compZnNav #r3062{width:9%}
#compZnNav #r5379{width:7%}
#compZnNav #r5380{width:10%}
#compZnNav #r5381{width:10%}
#compZnNav #r5382{width:7%}
#compZnNav #r5383{width:10%}
#compZnNav #r5384{width:10%}
#compZnNav #r5628{width:11%}
#compZnNav #r5385{width:14%}
#compZnNav #r5626{width:10%}
#compZnNav #r5627{width:7%}
#compZnNav LI A, #compZnNav LI A:hover{display:block;text-decoration:none;overflow:hidden;height:10px;padding:5px 0 10px 0}
#compZnNav .current A{background:url(/expert/images/zoneNavCurrent.gif) repeat-x}
#compZnNav LI A SPAN{font-weight:bold;font-size:11px;color:#ffffff}
#compZnNav LI A:hover{text-decoration:none}
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