AsiaV2b/modules/announcement/_annc_widget15.html.erb

<div class="w-annc  widget-announcement-4 w-annc  widget-announcement-15" style="position:relative;">
  <div class="w-annc__more-wrap clearfix">
    <h2 class="w-annc__widget-title">
      <span>{{widget-title}}</span>
    </h2>
    <a class="w-annc__more btn btn-primary pull-left" href="{{more_url}}"><%= (I18n.locale.to_s =="zh_tw") ? "閱讀更多" : "More NEWS" %></a>
  </div>
  <div style="position: absolute;top: 50%;bottom: 50%;width:100%;">
	<button class="btn-left" title = "<%= (I18n.locale.to_s =="zh_tw") ? "上一張" : "prev" %>" style="float: left;height: 2.5em; width: 2.5em;background: url(/assets/left-01.png) no-repeat;border: 0;background-size: contain;position: absolute;transition:.3s; left: 0.6%;"></button>
	<button class="btn-right" title = "<%= (I18n.locale.to_s =="zh_tw") ? "下一張" : "next" %>" style="float: right;;height: 2.5em; width: 2.5em;background: url(/assets/right-01.png) no-repeat;background-size: contain;border: 0;position: absolute;transition:.3s;right: 0.6%;"></button>
  </div>
  <ul class="w-annc__list  row" data-level="0" data-list="announcements">
    <li class="w-annc__item  col-md-4">
    <div class="w-annc__img-wrap bullseye">
      <img class="w-annc__img" src="{{img_src}}" alt="{{img_description}}" title="{{img_description}}">
    </div>
    <div class="w-annc__content-wrap">
      <div class="w-annc__meta">
        <span class="w-annc__status-wrap" data-list="statuses" data-level="1">
          <span class="w-annc__status label {{status-class}}">{{status}}</span>
        </span>
        <span class="w-annc__postdate-wrap" date-format="%Y-%m-%d">
          
          <span class="w-annc__postdate">{{postdate}}</span>
        </span>
        <span class="w-annc__category-wrap">
           
          <span class="w-annc__category">{{category}}</span>
          </span>
      </div>
      <h4 class="w-annc__entry-title">
        <a class="w-annc__title" href="{{link_to_show}}">{{title}}</a>
      </h4>
      <p class="w-annc__subtitle">{{subtitle}}</p>
    </div>
    </li>
  </ul>
</div>
<script src="//code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
	function combineul(){
		for(var i=1;i<$('.widget-announcement-4 ul.w-annc__list').length;i++)
			$('.widget-announcement-4 ul.w-annc__list').eq(0).find('>li').eq(-1).after($('.widget-announcement-4 ul.w-annc__list').eq(i).html());
		var ullength = $('.widget-announcement-4 ul.w-annc__list').length;
		for(var i = 1;i < ullength;i++)
			$('.widget-announcement-4 ul.w-annc__list').eq(-1).remove();
	};
	var lilength = $('.widget-announcement-4 li.w-annc__item').length;
	var num;
	function reorganize(num){
		combineul();
		for(var i=1;i< Math.ceil(lilength/num);i++){
			$('.widget-announcement-4 ul.w-annc__list').eq(-1).after('<ul class="w-annc__list  row" data-level="0" data-list="announcements"></ul>')
			var lihtml="";
			//var liheight=new Array(num);
			if(i != (Math.ceil(lilength/num)-1)){
				for(var j=0;j<num;j++){
					lihtml += "<li class='w-annc__item  col-md-4'>"+$('.widget-announcement-4 li.w-annc__item').eq(i*num+j).html()+"</li>"
					//liheight[j] = $('.widget-announcement-4 li.w-annc__item').eq(i*num+j).height()+20;//20=>margin-top+margin-bottom
				};
			}else{
				for(var j=0;j< lilength - num *(Math.ceil(lilength/num)-1) ;j++){
					lihtml += "<li class='w-annc__item  col-md-4'>"+$('.widget-announcement-4 li.w-annc__item').eq(i*num+j).html()+"</li>"
					//liheight[j] = $('.widget-announcement-4 li.w-annc__item').eq(i*num+j).height()+20;//20=>margin-top+margin-bottom
				};
			};
			$('.widget-announcement-4 ul.w-annc__list').eq(-1).html(lihtml);
		};
		if(Math.ceil(lilength/num) != 1 )
			for(var i=0;i< lilength -num ; i++ )
				$('.widget-announcement-4 ul.w-annc__list').eq(0).find("li.w-annc__item").eq(num).remove();
		for(var i=0;i< Math.ceil(lilength/num);i++)
			$('.widget-announcement-4 ul.w-annc__list').eq(i).attr("index",i);
		$('.widget-announcement-4 ul.w-annc__list').css("display","none");
		$('.widget-announcement-4 ul.w-annc__list').eq(0).css("display","flex");
		$('.widget-announcement-4 ul.w-annc__list').eq(0).addClass("active");
		$('.widget-announcement-4 ul.w-annc__list').css('padding','0 1.125em');
		$('.widget-announcement-4 button').css('z-index','10');
		$('.widget-announcement-4 ul.w-annc__list >li').css('width','calc('+100/num+'% - '+20/16+'em)'); //20px=>li的margin
	  $('.widget-announcement-4 ul.w-annc__list >li').css('float','left');
	};
	$(window).resize(function(){
		if($(window).width()>1024){
			reorganize(3);
			num=3;
		}else if($(window).width()>576){
			reorganize(2);
			num=2;
		}else{
			reorganize(1);
			num=1;
		}
	})
	$(document).ready(function(){
		if($(window).width()>1024){
			reorganize(3);
			num=3;
		}else if($(window).width()>576){
			reorganize(2);
			num=2;
		}else{
			reorganize(1);
			num=1;
		}
	var flag=false;
	$('.btn-left').click(function(){	
		if(!flag){
		var currentul = Number($('.widget-announcement-4 ul.w-annc__list.active').attr("index"));
		$('.widget-announcement-4 ul.w-annc__list').css('display','none');
		if(currentul - 1 < 0)
			currentul += Math.ceil(lilength/num);
		$('.widget-announcement-4 ul.w-annc__list').removeClass("active");
		$('.widget-announcement-4 ul.w-annc__list').eq(currentul-1).addClass("active");
		flag=true;
		$('.widget-announcement-4 ul.w-annc__list.active').eq(0).effect("slide", { direction: "left", mode: 'show', duration: 500},function(){flag=false;});
		};
	});
	$('.btn-right').click(function(){
		if(!flag){
		var currentul = Number($('.widget-announcement-4 ul.w-annc__list.active').attr("index"));
		$('.widget-announcement-4 ul.w-annc__list').css("display","none");
		if(currentul + 1 > Math.ceil(lilength/num) - 1)
			currentul -= Math.ceil(lilength/num);
		$('.widget-announcement-4 ul.w-annc__list').removeClass("active");
		$('.widget-announcement-4 ul.w-annc__list').eq(currentul+1).addClass("active");
		flag=true;
		$('.widget-announcement-4 ul.w-annc__list.active').eq(0).effect("slide", { direction: "right", mode: 'show', duration: 500},function(){flag=false;});
		};
	});
	});
</script>