Dynamic Date ticker/scroller
September 8th, 2006 Posted in Javascript, MYSQLThis is useful for displaying dynamic data in a small space, it scrolls the data and pauses at every line. It will also pause on mouseover
JAVASCRIPT:
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<script type="text/javascript"><!--
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/*Example message arrays for the two demo scrollers*/
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var pausecontent2=new Array()
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pausecontent2[0]='First item'pausecontent2[1]='Second item'pausecontent2[2]='Third item'// --></script>
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<script type="text/javascript"><!--
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/***********************************************
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* Pausing up-down scroller- © Dynamic Drive (<a href="http://www.dynamicdrive.com/" mce_href="http://www.dynamicdrive.com/">www.dynamicdrive.com</a>)
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* This notice MUST stay intact for legal use
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* Visit <a href="http://www.dynamicdrive.com/" mce_href="http://www.dynamicdrive.com/">http://www.dynamicdrive.com/</a> for this script and 100s more.
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***********************************************/
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function pausescroller(content, divId, divClass, delay){
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this.content=content //message array content
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this.tickerid=divId //ID of ticker div to display information
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this.delay=delay //Delay between msg change, in miliseconds.
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this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
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this.hiddendivpointer=1 //index of message array for hidden div
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document.write('
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<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden" mce_style="position: relative; overflow: hidden">
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<div class="innerDiv" style="position: absolute; width: 100%" mce_style="position: absolute; width: 100%" id="'+divId+'1">'+content[0]+'</div>
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<div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" mce_style="position: absolute; width: 100%; visibility: hidden" id="'+divId+'2">'+content[1]+'</div>
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</div>
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')
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var scrollerinstance=this
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if (window.addEventListener) //run onload in DOM2 browsers
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window.addEventListener("load", function(){scrollerinstance.initialize()}, false)
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else if (window.attachEvent) //run onload in IE5.5+
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window.attachEvent("onload", function(){scrollerinstance.initialize()})
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else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
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setTimeout(function(){scrollerinstance.initialize()}, 500)
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}
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// -
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// initialize()- Initialize scroller method.
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// -Get div objects, set initial positions, start up down animation
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// -
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pausescroller.prototype.initialize=function(){
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this.tickerdiv=document.getElementById(this.tickerid)
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this.visiblediv=document.getElementById(this.tickerid+"1")
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this.hiddendiv=document.getElementById(this.tickerid+"2")
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this.visibledivtop=parseInt(pausescroller.getCSSpadding(this.tickerdiv))
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//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
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this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
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this.getinline(this.visiblediv, this.hiddendiv)
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this.hiddendiv.style.visibility="visible"
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var scrollerinstance=this
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document.getElementById(this.tickerid).onmouseover=function(){scrollerinstance.mouseoverBol=1}
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document.getElementById(this.tickerid).onmouseout=function(){scrollerinstance.mouseoverBol=0}
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if (window.attachEvent) //Clean up loose references in IE
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window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null})
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setTimeout(function(){scrollerinstance.animateup()}, this.delay)
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}
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// -
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// animateup()- Move the two inner divs of the scroller up and in sync
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// -
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pausescroller.prototype.animateup=function(){
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var scrollerinstance=this
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if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){
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this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px"
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this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px"
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setTimeout(function(){scrollerinstance.animateup()}, 50)
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}
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else{
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this.getinline(this.hiddendiv, this.visiblediv)
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this.swapdivs()
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setTimeout(function(){scrollerinstance.setmessage()}, this.delay)
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}
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}
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// -
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// swapdivs()- Swap between which is the visible and which is the hidden div
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// -
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pausescroller.prototype.swapdivs=function(){
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var tempcontainer=this.visiblediv
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this.visiblediv=this.hiddendiv
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this.hiddendiv=tempcontainer
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}
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pausescroller.prototype.getinline=function(div1, div2){
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div1.style.top=this.visibledivtop+"px"
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div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"
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}
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// -
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// setmessage()- Populate the hidden div with the next message before it's visible
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// -
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pausescroller.prototype.setmessage=function(){
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var scrollerinstance=this
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if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
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setTimeout(function(){scrollerinstance.setmessage()}, 100)
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else{
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var i=this.hiddendivpointer
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var ceiling=this.content.length
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this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1
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this.hiddendiv.innerHTML=this.content[this.hiddendivpointer]
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this.animateup()
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}
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}
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pausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any
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if (tickerobj.currentStyle)
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return tickerobj.currentStyle["paddingTop"]
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else if (window.getComputedStyle) //if DOM2
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return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
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else
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return 0
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}
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// --></script>
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<script type="text/javascript"><!--
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//new pausescroller(name_of_message_array, CSS_ID, CSS_classname, pause_in_miliseconds)
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new pausescroller(pausecontent2, "pscroller2", "someclass", 2000)
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// --></script>