Ver Mensaje Individual
  #4 (permalink)  
Antiguo 22/08/2011, 18:50
lubtufano
 
Fecha de Ingreso: julio-2011
Mensajes: 220
Antigüedad: 13 años, 6 meses
Puntos: 72
Respuesta: Scroll de Noticias

Este código funciona bien.

Cita:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<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;
}


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

</style>

<?php
$conexion= mysql_connect("localhost", "usuario", "contraseña");
mysql_select_db("base", $conexion);
$result= mysql_query("select * from tabla", $conexion);

echo "<script type=text/javascript>\n";

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

echo "var pausecontent=new Array()\n";

$contador= 0;

while($row=mysql_fetch_array($result))
{
echo "pausecontent[$contador]='".$row['titulo']."'\n";
$contador++;
}


echo "</script>\n";

mysql_close($conexion);

?>

<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){
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.ticker id)
this.visiblediv=document.getElementById(this.ticke rid+"1")
this.hiddendiv=document.getElementById(this.ticker id+"2")
this.visibledivtop=parseInt(pausescroller.getCSSpa dding(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.w idth=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.animateup() }, this.delay)
}


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

pausescroller.prototype.animateup=function(){
var scrollerinstance=this
if (parseInt(this.hiddendiv.style.top)>(this.visibled ivtop+5)){
this.visiblediv.style.top=parseInt(this.visiblediv .style.top)-5+"px"
this.hiddendiv.style.top=parseInt(this.hiddendiv.s tyle.top)-5+"px"
setTimeout(function(){scrollerinstance.animateup() }, 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.top=this.visibledivtop+"px"
div2.style.top=Math.max(div1.parentNode.offsetHeig ht, div1.offsetHeight)+"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.animateup()
}
}

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

</script>
</head>

<body>
<script type="text/javascript">

//new pausescroller(name_of_message_array, CSS_ID, CSS_classname, pause_in_miliseconds)

new pausescroller(pausecontent, "pscroller1", "someclass", 1000)


</script>
</body>
</html>
Como se aprecia todo lo que se necesita hacer es conectarse a la base de datos y recuperar la información de la tabla adecuada, luego con esta información escribir el array javascript que es el que se muestra en el scroll.

Cita:
<?php
$conexion= mysql_connect("localhost", "usuario", "contraseña");
mysql_select_db("base", $conexion);
$result= mysql_query("select * from tabla", $conexion);

echo "<script type=text/javascript>\n";

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

echo "var pausecontent=new Array()\n";

$contador= 0;

while($row=mysql_fetch_array($result))
{
echo "pausecontent[$contador]='".$row['titulo']."'\n";
$contador++;
}


echo "</script>\n";

mysql_close($conexion);

?>
En este caso solo se mostrara el texto con el título de la noticia, si se desea que este sea un enlace hacia una página que muestra la noticia completa esto se debe realizar dentro del bucle while que escribe el Array. Por ejemplo:

Cita:
while($row=mysql_fetch_array($result))
{
echo "pausecontent[$contador]='<a href=\"ruta_de_la_pagina\">".$row['titulo']."</a>'\n";
$contador++;
}
Asi mismo si se quiere incluir un pequeño resumen de cada noticia, que se tenga en la tabla de la base de datos, se debe realizar en este bloque.