Pausing up-down Scroller - any direction

**dukevn** · 07-17-2008, 01:58 AM

1) Script Title: Pausing up-down Scroller

2) Script URL (on DD): http://www.dynamicdrive.com/dynamicindex2/crosstick.htm

3) Describe problem:

I want to control the direction that the scoller will scroll to, so I modify it a little. For now, the code below works with left, right, top, bottom:

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>pausing up-down Scroller</title>
<style type="text/css">

/*Example CSS for the two demo scrollers*/

#pscroller1{
width: 200px;
height: 100px;
border: 1px solid black;
padding: 5px;
background-color: lightyellow;
}

#pscroller2{
width: 350px;
height: 100px;
border: 1px solid black;
padding: 3px;
}

#pscroller2 a{
text-decoration: none;
}

.someclass{ //class to apply to your scroller(s) if desired
}

</style>

<script type="text/javascript">

/*Example message arrays for the two demo scrollers*/

var pausecontent=new Array()
pausecontent[0]='<a href="http://www.javascriptkit.com">JavaScript Kit</a><br />Comprehensive JavaScript tutorials and over 400+ free scripts!'
pausecontent[1]='<a href="http://www.codingforums.com">Coding Forums</a><br />Web coding and development forums.'
pausecontent[2]='<a href="http://www.cssdrive.com" target="_new">CSS Drive</a><br />Categorized CSS gallery and examples.'

var pausecontent2=new Array()
pausecontent2[0]='<a href="http://www.news.com">News.com: Technology and business reports</a>'
pausecontent2[1]='<a href="http://www.cnn.com">CNN: Headline and breaking news 24/7</a>'
pausecontent2[2]='<a href="http://news.bbc.co.uk">BBC News: UK and international news</a>'

</script>

<script type="text/javascript">

/***********************************************
* Pausing up-down scroller- © Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/

function pausescroller(content, divId, divClass, delay, scrollto){
this.scroll=scrollto // direction from
this.content=content //message array content
this.tickerid=divId //ID of ticker div to display information
this.delay=delay //Delay between msg change, in miliseconds.
this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
this.hiddendivpointer=1 //index of message array for hidden div
document.write('<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 100%" id="'+divId+'1">'+content[0]+'</div><div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+divId+'2">'+content[1]+'</div></div>')
var scrollerinstance=this
if (window.addEventListener) //run onload in DOM2 browsers
window.addEventListener("load", function(){scrollerinstance.initialize()}, false)
else if (window.attachEvent) //run onload in IE5.5+
window.attachEvent("onload", function(){scrollerinstance.initialize()})
else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
setTimeout(function(){scrollerinstance.initialize()}, 500)
}

// -------------------------------------------------------------------
// initialize()- Initialize scroller method.
// -Get div objects, set initial positions, start up down animation
// -------------------------------------------------------------------

pausescroller.prototype.initialize=function(){
this.tickerdiv=document.getElementById(this.tickerid)
this.visiblediv=document.getElementById(this.tickerid+"1")
this.hiddendiv=document.getElementById(this.tickerid+"2")
this.visibledivtop=parseInt(pausescroller.getCSSpadding(this.tickerdiv))
//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
this.getinline(this.visiblediv, this.hiddendiv)
this.hiddendiv.style.visibility="visible"
var scrollerinstance=this
document.getElementById(this.tickerid).onmouseover=function(){scrollerinstance.mouseoverBol=1}
document.getElementById(this.tickerid).onmouseout=function(){scrollerinstance.mouseoverBol=0}
if (window.attachEvent) //Clean up loose references in IE
window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null})
setTimeout(function(){scrollerinstance.animate()}, this.delay)
}


// -------------------------------------------------------------------
// animate()- Move the two inner divs of the scroller up and in sync
// -------------------------------------------------------------------

pausescroller.prototype.animate=function(){
var scrollerinstance=this
if (parseInt(this.hiddendiv.style[this.scroll])>(this.visibledivtop+5)){
this.visiblediv.style[this.scroll]=parseInt(this.visiblediv.style[this.scroll])-5+"px"
this.hiddendiv.style[this.scroll]=parseInt(this.hiddendiv.style[this.scroll])-5+"px"
setTimeout(function(){scrollerinstance.animate()}, 50)
}
else{
this.getinline(this.hiddendiv, this.visiblediv)
this.swapdivs()
setTimeout(function(){scrollerinstance.setmessage()}, this.delay)
}
}

// -------------------------------------------------------------------
// swapdivs()- Swap between which is the visible and which is the hidden div
// -------------------------------------------------------------------

pausescroller.prototype.swapdivs=function(){
var tempcontainer=this.visiblediv
this.visiblediv=this.hiddendiv
this.hiddendiv=tempcontainer
}

pausescroller.prototype.getinline=function(div1, div2){
div1.style[this.scroll]=this.visibledivtop+"px"
if (this.scroll==('top'|'bottom')) { 
	div2.style[this.scroll]=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"
} else {
	div2.style[this.scroll]=Math.max(div1.parentNode.offsetWidth, div1.offsetWidth)+"px"
}
}

// -------------------------------------------------------------------
// setmessage()- Populate the hidden div with the next message before it's visible
// -------------------------------------------------------------------

pausescroller.prototype.setmessage=function(){
var scrollerinstance=this
if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
setTimeout(function(){scrollerinstance.setmessage()}, 100)
else{
var i=this.hiddendivpointer
var ceiling=this.content.length
this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1
this.hiddendiv.innerHTML=this.content[this.hiddendivpointer]
this.animate()
}
}

pausescroller.getCSSpadding=function(obj){ //get CSS padding value, if any
if (obj.currentStyle)
return obj.currentStyle["paddingTop"]
else if (window.getComputedStyle) //if DOM2
return window.getComputedStyle(obj, "").getPropertyValue("padding-top")
else
return 0
}

new pausescroller(pausecontent, "pscroller1", "someclass", 3000, 'left')

</script>
</head>
<body>

</body>
</html>

Nothing wrong with left, right, top at all, except bottom. When scroller is set with bottom, the text is aligned with the bottom of the div - that I do not want. I want the text is aligned with the top, when the scroller still scrolls to bottom.

I tried to modify almost everything related to top, bottom but with no success. Anybody has advice?

Another question: is it possible to modify the code so that it scrolls diagonally, say for example, from top-left?

Thanks,

D.

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