Fuente: http://www.pizcos.net/2010/11/slide-automatico-de-tus-ultimas.html
Este fin de semana he hecho algunos cambios en el blog, además de la pseudo visualización previa de las entradas en la portada he cambiado el slide que tenia. Es un slide que automáticamente te muestra las últimas entradas que publicas. Para ello he usado la explicación de Simplex Design, aunque lo he modificado para que muestre las últimas entradas y no solo muestre las entradas de una categoría elegida.
Para implementarlo debéis editar vuestra plantilla y seguir los siguientes pasos:
CSS (antes de ]]></b:skin>)
#featured {
margin:20px 0 0;
}
.sliderwrapper {
position: relative;
overflow: hidden;
border: 10px solid #e1e1e1;
border-bottom-width: 6px;
height: 250px;
}
.sliderwrapper .contentdiv {
background:#ccc;
visibility: hidden;
position: absolute;
left: 0;
top: 0;
padding: 5px;
height: 100%;
filter:progid:DXImageTransform.Microsoft.alpha(opacity=100);
-moz-opacity: 1;
opacity: 1;
}
.pagination {
text-align: right;
background-color:#e1e1e1;
padding: 2px 10px 10px;
}
.pagination a {
font-size:11px;
color:#333;
padding: 0 5px;
background:#ccc;
}
.pagination a:hover, .pagination a.selected {
color:#68667B;
background-color:#fff;
}
.featuredPost {
width:100%;
height:25%;
padding:5px 10px 10px;
background:#ccc;
filter:alpha(opacity=70);
-moz-opacity:0.7;
-khtml-opacity: 0.7;
opacity: 0.7;
color:#fff;
position:absolute;
bottom:0;
}
.featuredPost a {
color:#333;
}
.featuredPost a:hover {
color:#dedde5;
}
.featuredPost h2 {
margin:0;
font-size:20px;
line-height:1;
}
.featuredPost span {
font-size:10px;
}
.featuredPost p {
font-size:11px;
}
Esta parte deberéis ajustarla con respecto a colores, fuentes, tamaño, etc.
Script 1 (antes de </head>)
<script>
imgr = new Array();
imgr[0] = "URL_DE_LA_IMAGEN_QUE_SE_MOSTRARA_SI_NO_HAY_NINGUNA_EN_LA_ENTRADA";
showRandomImg = true;
aBold = true;
summaryPost = 0;
numposts1 = 5;
label1 = "";
function removeHtmlTag(strx,chop){var s=strx.split("<");for(var i=0;i<s.length;i++){if(s[i].indexOf(">")!=-1){s[i]=s[i].substring(s[i].indexOf(">")+1,s[i].length)}}s=s.join("");s=s.substring(0,chop-1);return s}
function showrecentposts1(json){j=(showRandomImg)?Math.floor((imgr.length+1)*Math.random()):0;img=new Array();for(var i=0;i<numposts1;i++){var entry=json.feed.entry[i];var posttitle=entry.title.$t;var pcm;var posturl;if(i==json.feed.entry.length)break;for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='alternate'){posturl=entry.link[k].href;break}}for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='replies'&&entry.link[k].type=='text/html'){pcm=entry.link[k].title.split("")[0];break}}
if ("content" in entry) {
var postcontent = entry.content.$t;}
else
if ("summary" in entry) {
var postcontent = entry.summary.$t;}
else var postcontent = "";
postdate = entry.published.$t;
if(j>imgr.length-1) j=0;
img[i] = imgr[j];
s = postcontent ; a = s.indexOf("<img"); b = s.indexOf("src="",a); c = s.indexOf(""",b+5); d = s.substr(b+5,c-b-5);
if((a!=-1)&&(b!=-1)&&(c!=-1)&&(d!="")) img[i] = d;
var month=[1,2,3,4,5,6,7,8,9,10,11,12];var month2=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];var day=postdate.split("-")[2].substring(0,2);var m=postdate.split("-")[1];var y=postdate.split("-")[0];for(var u2=0;u2<month.length;u2++){if(parseInt(m)==month[u2]){m=month2[u2];break;
}}
var daystr = day+ ' ' + m + ' ' + y ;
var trtd = '<div class="contentdiv"><div class="sliderPostPhoto"><a href="'+posturl+'"><img width="100%" height="100%" class="alignnone" src="'+img[i]+'"/></a><div class="sliderPostInfo"></div></div><div class="featuredPost"><h2><a href="'+posturl+'">'+posttitle+'</a></h2><span>'+daystr+'</span><p>'+removeHtmlTag(postcontent,summaryPost)+'...</p></div></div>';
document.write(trtd);
j++;
}}
</script>
Aquí podéis elegir si queréis mostrar más de 5 entradas (numposts1 = 5;) y si queréis mostrar un resumen del post (summaryPost = 240;).Yo no lo muestro por lo que lo tengo a 0 pero si decidís mostrarlo deberéis también ajustar el css, ampliando el porcentaje de height:25%;.
Script 2 (antes de </body>)
<script type='text/javascript'>
//<![CDATA[
var featuredcontentslider={
//3 variables below you can customize if desired:
ajaxloadingmsg: '<div style="margin: 20px 0 0 20px"><img src="loading.gif" /> Fetching slider Contents. Please wait...</div>',
bustajaxcache: true, //bust caching of external ajax page after 1st request?
enablepersist: true, //persist to last content viewed when returning to page?
settingcaches: {}, //object to cache "setting" object of each script instance
jumpTo:function(fcsid, pagenumber){ //public function to go to a slide manually.
this.turnpage(this.settingcaches[fcsid], pagenumber)
},
ajaxconnect:function(setting){
var page_request = false
if (window.ActiveXObject){ //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
try {
page_request = new ActiveXObject("Msxml2.XMLHTTP")
}
catch (e){
try{
page_request = new ActiveXObject("Microsoft.XMLHTTP")
}
catch (e){}
}
}
else if (window.XMLHttpRequest) // if Mozilla, Safari etc
page_request = new XMLHttpRequest()
else
return false
var pageurl=setting.contentsource[1]
page_request.onreadystatechange=function(){
featuredcontentslider.ajaxpopulate(page_request, setting)
}
document.getElementById(setting.id).innerHTML=this.ajaxloadingmsg
var bustcache=(!this.bustajaxcache)? "" : (pageurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
page_request.open('GET', pageurl+bustcache, true)
page_request.send(null)
},
ajaxpopulate:function(page_request, setting){
if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
document.getElementById(setting.id).innerHTML=page_request.responseText
this.buildpaginate(setting)
}
},
buildcontentdivs:function(setting){
var alldivs=document.getElementById(setting.id).getElementsByTagName("div")
for (var i=0; i<alldivs.length; i++){
if (this.css(alldivs[i], "contentdiv", "check")){ //check for DIVs with class "contentdiv"
setting.contentdivs.push(alldivs[i])
alldivs[i].style.display="none" //collapse all content DIVs to begin with
}
}
},
buildpaginate:function(setting){
this.buildcontentdivs(setting)
var sliderdiv=document.getElementById(setting.id)
var pdiv=document.getElementById("paginate-"+setting.id)
var phtml=""
var toc=setting.toc
var nextprev=setting.nextprev
if (typeof toc=="string" && toc!="markup" || typeof toc=="object"){
for (var i=1; i<=setting.contentdivs.length; i++){
phtml+='<a href="#'+i+'" class="toc">'+(typeof toc=="string"? toc.replace(/#increment/, i) : toc[i-1])+'</a> '
}
phtml=(nextprev[0]!=''? '<a href="#prev" class="prev">'+nextprev[0]+'</a> ' : '') + phtml + (nextprev[1]!=''? '<a href="#next" class="next">'+nextprev[1]+'</a>' : '')
pdiv.innerHTML=phtml
}
var pdivlinks=pdiv.getElementsByTagName("a")
var toclinkscount=0 //var to keep track of actual # of toc links
for (var i=0; i<pdivlinks.length; i++){
if (this.css(pdivlinks[i], "toc", "check")){
if (toclinkscount>setting.contentdivs.length-1){ //if this toc link is out of range (user defined more toc links then there are contents)
pdivlinks[i].style.display="none" //hide this toc link
continue
}
pdivlinks[i].setAttribute("rel", ++toclinkscount) //store page number inside toc link
pdivlinks[i][setting.revealtype]=function(){
featuredcontentslider.turnpage(setting, this.getAttribute("rel"))
return false
}
setting.toclinks.push(pdivlinks[i])
}
else if (this.css(pdivlinks[i], "prev", "check") || this.css(pdivlinks[i], "next", "check")){ //check for links with class "prev" or "next"
pdivlinks[i].onclick=function(){
featuredcontentslider.turnpage(setting, this.className)
return false
}
}
}
this.turnpage(setting, setting.currentpage, true)
if (setting.autorotate[0]){ //if auto rotate enabled
pdiv[setting.revealtype]=function(){
featuredcontentslider.cleartimer(setting, window["fcsautorun"+setting.id])
}
sliderdiv["onclick"]=function(){ //stop content slider when slides themselves are clicked on
featuredcontentslider.cleartimer(setting, window["fcsautorun"+setting.id])
}
setting.autorotate[1]=setting.autorotate[1]+(1/setting.enablefade[1]*50) //add time to run fade animation (roughly) to delay between rotation
this.autorotate(setting)
}
},
urlparamselect:function(fcsid){
var result=window.location.search.match(new RegExp(fcsid+"=(\d+)", "i")) //check for "?featuredcontentsliderid=2" in URL
return (result==null)? null : parseInt(RegExp.$1) //returns null or index, where index (int) is the selected tab's index
},
turnpage:function(setting, thepage, autocall){
var currentpage=setting.currentpage //current page # before change
var totalpages=setting.contentdivs.length
var turntopage=(/prev/i.test(thepage))? currentpage-1 : (/next/i.test(thepage))? currentpage+1 : parseInt(thepage)
turntopage=(turntopage<1)? totalpages : (turntopage>totalpages)? 1 : turntopage //test for out of bound and adjust
if (turntopage==setting.currentpage && typeof autocall=="undefined") //if a pagination link is clicked on repeatedly
return
setting.currentpage=turntopage
setting.contentdivs[turntopage-1].style.zIndex=++setting.topzindex
this.cleartimer(setting, window["fcsfade"+setting.id])
setting.cacheprevpage=setting.prevpage
if (setting.enablefade[0]==true){
setting.curopacity=0
this.fadeup(setting)
}
if (setting.enablefade[0]==false){ //if fade is disabled, fire onChange event immediately (verus after fade is complete)
setting.contentdivs[setting.prevpage-1].style.display="none" //collapse last content div shown (it was set to "block")
setting.onChange(setting.prevpage, setting.currentpage)
}
setting.contentdivs[turntopage-1].style.visibility="visible"
setting.contentdivs[turntopage-1].style.display="block"
if (setting.prevpage<=setting.toclinks.length) //make sure pagination link exists (may not if manually defined via "markup", and user omitted)
this.css(setting.toclinks[setting.prevpage-1], "selected", "remove")
if (turntopage<=setting.toclinks.length) //make sure pagination link exists (may not if manually defined via "markup", and user omitted)
this.css(setting.toclinks[turntopage-1], "selected", "add")
setting.prevpage=turntopage
if (this.enablepersist)
this.setCookie("fcspersist"+setting.id, turntopage)
},
setopacity:function(setting, value){ //Sets the opacity of targetobject based on the passed in value setting (0 to 1 and in between)
var targetobject=setting.contentdivs[setting.currentpage-1]
if (targetobject.filters && targetobject.filters[0]){ //IE syntax
if (typeof targetobject.filters[0].opacity=="number") //IE6
targetobject.filters[0].opacity=value*100
else //IE 5.5
targetobject.style.filter="alpha(opacity="+value*100+")"
}
else if (typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax
targetobject.style.MozOpacity=value
else if (typeof targetobject.style.opacity!="undefined") //Standard opacity syntax
targetobject.style.opacity=value
setting.curopacity=value
},
fadeup:function(setting){
if (setting.curopacity<1){
this.setopacity(setting, setting.curopacity+setting.enablefade[1])
window["fcsfade"+setting.id]=setTimeout(function(){featuredcontentslider.fadeup(setting)}, 50)
}
else{ //when fade is complete
if (setting.cacheprevpage!=setting.currentpage) //if previous content isn't the same as the current shown div (happens the first time the page loads/ script is run)
setting.contentdivs[setting.cacheprevpage-1].style.display="none" //collapse last content div shown (it was set to "block")
setting.onChange(setting.cacheprevpage, setting.currentpage)
}
},
cleartimer:function(setting, timervar){
if (typeof timervar!="undefined"){
clearTimeout(timervar)
clearInterval(timervar)
if (setting.cacheprevpage!=setting.currentpage){ //if previous content isn't the same as the current shown div
setting.contentdivs[setting.cacheprevpage-1].style.display="none"
}
}
},
css:function(el, targetclass, action){
var needle=new RegExp("(^|\s+)"+targetclass+"($|\s+)", "ig")
if (action=="check")
return needle.test(el.className)
else if (action=="remove")
el.className=el.className.replace(needle, "")
else if (action=="add")
el.className+=" "+targetclass
},
autorotate:function(setting){
window["fcsautorun"+setting.id]=setInterval(function(){featuredcontentslider.turnpage(setting, "next")}, setting.autorotate[1])
},
getCookie:function(Name){
var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return null
},
setCookie:function(name, value){
document.cookie = name+"="+value
},
init:function(setting){
var persistedpage=this.getCookie("fcspersist"+setting.id) || 1
var urlselectedpage=this.urlparamselect(setting.id) //returns null or index from: mypage.htm?featuredcontentsliderid=index
this.settingcaches[setting.id]=setting //cache "setting" object
setting.contentdivs=[]
setting.toclinks=[]
setting.topzindex=0
setting.currentpage=urlselectedpage || ((this.enablepersist)? persistedpage : 1)
setting.prevpage=setting.currentpage
setting.revealtype="on"+(setting.revealtype || "click")
setting.curopacity=0
setting.onChange=setting.onChange || function(){}
if (setting.contentsource[0]=="inline")
this.buildpaginate(setting)
if (setting.contentsource[0]=="ajax")
this.ajaxconnect(setting)
}
}
//]]>
</script>
<script>
featuredcontentslider.init({
id: "slider1", //id of main slider DIV
contentsource: ["inline", ""], //Valid values: ["inline", ""] or ["ajax", "path_to_file"]
toc: "#increment", //Valid values: "#increment", "markup", ["label1", "label2", etc]
nextprev: ["Anterior", "Posterior"], //labels for "prev" and "next" links. Set to "" to hide.
enablefade: [true, 0.5], //[true/false, fadedegree]
autorotate: [true, 6000], //[true/false, pausetime]
onChange: function(previndex, curindex){ //event handler fired whenever script changes slide
//previndex holds index of last slide viewed b4 current (1=1st slide, 2nd=2nd etc.)
//curindex holds index of currently shown slide (1=1st slide, 2nd=2nd etc)
}
})
</script>
HTML (justo después de <div id='main-wrapper'>)
<div id='featured'>
<div class='sliderwrapper' id='slider1'>
<script>
document.write("<script src=\"/feeds/posts/default/?max-results="+numposts1+"&orderby=published&alt=json-in-script&callback=showrecentposts1\"></script>");
</script>
</div>
<div class='pagination' id='paginate-slider1'>
</div>
</div>
Por ultimo un detalle o truco, tal como esta configurado ahora, con un ancho de 960px, es conveniente que incorporéis imágenes grandes (+940px) a vuestras entradas. Os preguntareis que eso no puede ser, porque Blogger la redimensiona, vuestro ancho de las entradas será más pequeño, etc. Pero hay un truco, muy fácil, que mantendrá las imágenes al tamaño que queráis en vuestras entradas pero las mostrara en grande en el slide. De origen el slide redimensionaba las imágenes y no se veían bien una vez redimensionadas. Si incorporáis una imagen grande, las subís a vuestra entrada como siempre y en la URL de la imagen que os proporciona Blogger solo deberéis modificar la parte donde indica el tamaño (S320, S400, etc.) dejándolo en S0.
NO FUNCIONA
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