Slider automático para mostrar las últimas entradas del blog (Easy Slider) – Settlement – Lincoln – programmers

Este es un slider queAbu Farhan adaptó delEasy Slider, unslider hecho con jQuery, y que con su adaptación lo ha hechoautomático de manera que muestre las últimas entradas del blog tal como elslider automático que vimos hace algunas semanas, es decir, que el slider mostrará las últimas entradas del blog de forma automática, sin necesidad de agregar manualmente las entradas.

Nosotros por nuestra parte, hemos modificado un poco el slider, no mucho en realidad, sólo hemos cambiado la forma como se muestran los resúmenes de las entradas, y en lugar de usar servicios externos para alojar los scripts, los alojaremos directo en la plantilla.

El demo del slider lo puedes ver aquí mismo en esta entrada.

Para poner este slider en tu blog entra en laEdición HTML, y antes de/b:skin agrega los estilos:

/* Easy Slider (Automático)
-------------------------------------------------------------------- */
#slide-container {
width:480px;
height:320px;
position:relative;
}
#slider {
width:480px;
height:320px;
left:25px;
overflow-x:hidden;
overflow-y:hidden;
position:relative;
}
.slide-desc {
background:transparent url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUOz7qiW8lxmeOGBaLejJDFGlB8YQhZLFn_kHqKl-CqHFtsGWYI7qRV3UJARYIdTcKJJ91y_ZDc0Yu9zBXFP-JRQGf8jCAMpaQMVNNH0Pvj3W_FsPNXD2psNmM3usIBaZJZQjP-mlXvao/s30/bgtransparent.png) repeat scroll 0 0;
color:#FFFFFF;
padding:10px;
position:absolute;
text-align:left;
bottom:0;
width:100%;
z-index:99999;
}
.slide-desc h2{
display:block;
color:#f2f2f2;
font-size:14px;
}
.crosscol .widget-content {position:relative;}
#slider ul, #slider li {
margin:0;
padding:0;
list-style:none;
}
#slider li {
width:480px;
height:320px;
overflow:hidden;
}
#prevBtn, #nextBtn {
display:block;
width:30px;
height:77px;
position:absolute;
left:-30px;
text-indent:-9999px;
top:71px;
z-index:1000;
}
#nextBtn {
left:500px !important;
}
#prevBtn, #nextBtn {
display:block;
left:0;
position:absolute;
top:132px;
width:30px;
height:77px;
z-index:1000;
}
#prevBtn a, #nextBtn a {
display:block;
position:relative;
width:30px;
height:77px;
background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi44azfaLjGkc8e-1dGcbPgMsP6OnLz8GiF9avK_wYT37SSodRyILAHuRSZ_uuaeUymWfoIj2ROsy2QUZ-qnMJM5mGHyxEAs1Voimp8HL350Hq5RBFplf7g6c6H7HgbLYwJ49wpTWes-Pw/s77/flecha-prev.png) no-repeat 0 0;
}
#nextBtn a {
background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQTMiW_YbwZbWBBEiJgGi77CGmmFZOk_TCKpUCyho0kszGq0udKn5lyTaDv2V5cCIoE5QbOzcQt8hsPltKmA1LdjCweBfiA4RbStpGSpqHa-7_a2dF5uOaVoZnmlGOYtHm7k4_Armko7A/s77/flecha-next.png) no-repeat 0 0;
}
/* Estilos de los números */
ol#controls{
margin:8px 25px;
padding:0;
height:28px;
}
ol#controls li{
margin:0 4px 0 0;
padding:0;
float:left;
list-style:none;
height:28px;
line-height:28px;
}
ol#controls li a{
float:left;
height:28px;
line-height:28px;
border:1px solid #000; /* Borde de los números */
background:#0B243B;/* Color de fondo de los números */
color:#fff;/* Color de los números */
padding:0 10px;
text-decoration:none;
}
ol#controls li.current a{
background:#5DC9E1;/* Color de fondo del número activo */
color:#fff;/* Color del número activo */
}
ol#controls li a:focus, #prevBtn a:focus, #nextBtn a:focus{outline:none;}

Ahora antes de/head agrega este script:

script
//![CDATA[
var showpostthumbnails_gal = true;
var showpostsummary_gal = true;
var random_posts = false;
var numchars_gal = 150;
var numposts_gal = 10;
function showgalleryposts(json) {
var numPosts = json.feed.openSearch$totalResults.$t;
var indexPosts = new Array();
document.write('ul');
for (var i = 0; i numPosts; ++i) {
indexPosts[i] = i;
}
if (random_posts == true){
indexPosts.sort(function() {return 0.5 - Math.random()});
}
if (numposts_gal numPosts) {
numposts_gal = numPosts;
}
for (i = 0; i numposts_gal; ++i) {
var entry_gal = json.feed.entry[indexPosts[i;
var posttitle_gal = entry_gal.title.$t;
for (var k = 0; k entry_gal.link.length; k++) {
if ( entry_gal.link[k].rel == 'alternate') {
posturl_gal = entry_gal.link[k].href;
break;
}
}
if ("content" in entry_gal) {
var postcontent_gal = entry_gal.content.$t
}
s = postcontent_gal;
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 != "")) {
var thumburl_gal = d
} else var thumburl_gal = 'https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg25uGB2CHzJuN7vT1E1CwKYugvYRaMffgD0XE14mbin97lvLTVZ8RQo2dAnYN8IpW4HFEsreKuvuPMNQJGt5s8BRAizeaqEWDJGPIKNiTu7pVL5HGA2_azvihXni81DjLTdV_eQ5p5QpU/s0/sin-imagen.png';
document.write('lidiv id="slide-container"span class="slide-desc"h2 style="margin:10px 0px;"');
document.write(posttitle_gal + '/h2');
var re = /\S[^]*/g;
postcontent_gal = postcontent_gal.replace(re, "");
if (showpostsummary_gal == true) {
if (postcontent_gal.length numchars_gal) {
document.write(postcontent_gal);
document.write('/span')
} else {
postcontent_gal = postcontent_gal.substring(0, numchars_gal);
var quoteEnd_gal = postcontent_gal.lastIndexOf(" ");
postcontent_gal = postcontent_gal.substring(0, quoteEnd_gal);
document.write(postcontent_gal + '...');
document.write('/span')
}
}
document.write('a href="' + posturl_gal + '"img src="' + thumburl_gal + '" width="480px" height="320"//a/div');
document.write('/li');
}
document.write('/ul');

}
//
/script

Lo siguiente será pegar antes de/body este script:

script src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js' type='text/javascript'/

script type='text/javascript'
//![CDATA[
/*
* Easy Slider 1.7 - jQuery plugin
* written by Alen Grakalic
* http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
* Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
*/
(function($){$.fn.easySlider=function(options){var defaults={prevId:'prevBtn',prevText:'Previous',nextId:'nextBtn',nextText:'Next',controlsShow:true,controlsBefore:'',controlsAfter:'',controlsFade:true,firstId:'firstBtn',firstText:'First',firstShow:false,lastId:'lastBtn',lastText:'Last',lastShow:false,vertical:false,speed:800,auto:false,pause:5000,continuous:false,numeric:false,numericId:'controls'};var options=$.extend(defaults,options);this.each(function(){var obj=$(this);var s=$("li",obj).length;var w=$("li",obj).width();var h=$("li",obj).height();var clickable=true;obj.width(w);obj.height(h);obj.css("overflow","hidden");var ts=s-1;var t=0;$("ul",obj).css('width',s*w);if(options.continuous){$("ul",obj).prepend($("ul li:last-child",obj).clone().css("margin-left","-"+w+"px"));$("ul",obj).append($("ul li:nth-child(2)",obj).clone());$("ul",obj).css('width',(s+1)*w)};if(!options.vertical)$("li",obj).css('float','left');if(options.controlsShow){var html=options.controlsBefore;if(options.numeric){html+='ol id="'+options.numericId+'"/ol'}else{if(options.firstShow)html+='span id="'+options.firstId+'"a href=\"javascript:void(0);\"'+options.firstText+'/a/span';html+=' span id="'+options.prevId+'"a href=\"javascript:void(0);\"'+options.prevText+'/a/span';html+=' span id="'+options.nextId+'"a href=\"javascript:void(0);\"'+options.nextText+'/a/span';if(options.lastShow)html+=' span id="'+options.lastId+'"a href=\"javascript:void(0);\"'+options.lastText+'/a/span'};html+=options.controlsAfter;$(obj).after(html)};if(options.numeric){for(var i=0;is;i++){$(document.createElement("li")).attr('id',options.numericId+(i+1)).html('a rel='+i+' href=\"javascript:void(0);\"'+(i+1)+'/a').appendTo($("#"+options.numericId)).click(function(){animate($("a",$(this)).attr('rel'),true)})}}else{$("a","#"+options.nextId).click(function(){animate("next",true)});$("a","#"+options.prevId).click(function(){animate("prev",true)});$("a","#"+options.firstId).click(function(){animate("first",true)});$("a","#"+options.lastId).click(function(){animate("last",true)})};function setCurrent(i){i=parseInt(i)+1;$("li","#"+options.numericId).removeClass("current");$("li#"+options.numericId+i).addClass("current")};function adjust(){if(tts)t=0;if(t0)t=ts;if(!options.vertical){$("ul",obj).css("margin-left",(t*w*-1))}else{$("ul",obj).css("margin-left",(t*h*-1))}clickable=true;if(options.numeric)setCurrent(t)};function animate(dir,clicked){if(clickable){clickable=false;var ot=t;switch(dir){case"next":t=(ot=ts)?(options.continuous?t+1:ts):t+1;break;case"prev":t=(t=0)?(options.continuous?t-1:0):t-1;break;case"first":t=0;break;case"last":t=ts;break;default:t=dir;break};var diff=Math.abs(ot-t);var speed=diff*options.speed;if(!options.vertical){p=(t*w*-1);$("ul",obj).animate({marginLeft:p},{queue:false,duration:speed,complete:adjust})}else{p=(t*h*-1);$("ul",obj).animate({marginTop:p},{queue:false,duration:speed,complete:adjust})};if(!options.continuous&&options.controlsFade){if(t==ts){$("a","#"+options.nextId).hide();$("a","#"+options.lastId).hide()}else{$("a","#"+options.nextId).show();$("a","#"+options.lastId).show()};if(t==0){$("a","#"+options.prevId).hide();$("a","#"+options.firstId).hide()}else{$("a","#"+options.prevId).show();$("a","#"+options.firstId).show()}};if(clicked)clearTimeout(timeout);if(options.auto&&dir=="next"&&!clicked){;timeout=setTimeout(function(){animate("next",false)},diff*options.speed+options.pause)}}};var timeout;if(options.auto){;timeout=setTimeout(function(){animate("next",false)},options.pause)};if(options.numeric)setCurrent(0);if(!options.continuous&&options.controlsFade){$("a","#"+options.prevId).hide();$("a","#"+options.firstId).hide()}})}})(jQuery);

$(document).ready(function(){
$("#slider").easySlider({
auto: true,
continuous: true,
numeric: false// Cambiar a true si se quiere mostrar la paginación de números
});
});
//
/script

Por último entra en la sección deDiseño y agrega un elementoHTML/Javascript, ahí pega esto:

div id="slider"
script style="text/javascript"
var numposts_gal = 10;// Número de entradas a mostrar
var numchars_gal = 150;// Número de caracteres en el resumen
var random_posts = false;// Cambiar por true si se quieren aleatorios
/script
script src="http://nombre-de-mi-blog.blogspot.com/feeds/posts/default?orderby=published&alt=json-in-script&callback=showgalleryposts&max-results=999999"/script
/div

Cambia el nombre de tu blog donde se indica y listo.
En color naranja puedes ver algunas variantes, una de ellas es que connumeric podemos hacer desaparecer las flechas y en su lugar mostrar una paginación con números para poder navegar por las entradas del slider.
En el último código podrás ver dónde configurar el número de entradas a mostrar, el número de caracteres en el resumen, y si se desea que las entradas aparezcan de forma aleatoria.

Si deseas cambiar el tamaño del slider cambia todos los width:480px; y height:320px; que encuentres, incluyendo los de esta área:

img src="' + thumburl_gal + '"width="480px" height="320"/

Las flechas son imágenes, así que si deseas modificarlas en color o forma tendrás que cambiar las URLs que se encuentran en el primer código.

Como puedes ver, es un slider con muchas ventajas, la principal es que muestra el contenido de forma automática, sin necesidad de estar agregando entrada por entrada; pero además, la posibilidad de elegir la paginación y las entradas de forma aleatoria le dan un extra.

Vía | Abu Farhan

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