// JavaScript Document	2016   zouyang


var fx  = {
	buffer : function(obj, cur, target, fnDo, fnEnd, fs){
		if(!fs)fs=6;
		var now={};
		var x=0;
		var v=0;
		
		if(!obj.__last_timer)obj.__last_timer=0;
		var t=new Date().getTime();
		if(t-obj.__last_timer>20)
		{
			fnMove();
			obj.__last_timer=t;
		}
		
		clearInterval(obj.timer);
		obj.timer=setInterval(fnMove, 20);
		function fnMove(){
			v=Math.ceil((100-x)/fs);			
			x+=v;			
			for(var i in cur)
			{
				now[i]=(target[i]-cur[i])*x/100+cur[i];
			}						
			if(fnDo)fnDo.call(obj, now);
			
			if(Math.abs(v)<1 && Math.abs(100-x)<1)
			{
				clearInterval(obj.timer);
				if(fnEnd)fnEnd.call(obj, target);
			}
		}
	},
};

//监听css3运动终止
(function (){
	var aListener=[];	//{obj, fn, arg}
	if(!Modernizr.csstransitions)return;	
	if(window.navigator.userAgent.toLowerCase().search('webkit')!=-1)
	{
		document.addEventListener('webkitTransitionEnd', endListrner, false);
	}
	else
	{
		document.addEventListener('transitionend', endListrner, false);
	}
	
	function endListrner(ev)
	{
		var oEvObj=ev.srcElement||ev.target;
		//alert(aListener.length);
		for(var i=0;i<aListener.length;i++)
		{
			if(oEvObj==aListener[i].obj)
			{
				aListener[i].fn.call(aListener[i].obj, aListener[i].arg);
				aListener.remove(aListener[i--]);
			}
		}
	}
	
	fx.addEnd=function (obj, fn, arg)
	{
		if(!obj || !fn)return;
		aListener.push({obj: obj, fn: fn, arg: arg});
	}
})();



//JQ 开始
$(function(){
	var now=0;
	var ready=true;
	var W=document.documentElement.clientWidth || document.body.clientWidth;
	var H=document.documentElement.clientHeight || document.body.clientHeight;	
	var $bg = $("#bg");	
	var oDiv = $bg.get(0);
	var next =function(){
		return (now+1)%3;
	}
	
	
//爆炸  导航键向左加点击事件
    $("#btn_explode_left").on("click",function(){
		var pNext = next()+1;
/* 		switch ( pNext )	
		{
			case 2: pNext=3;
			break;
			case 3: pNext=1;
			break;
			case 1: pNext=2;
			break;
		} */
		if(!ready)return;
		ready=false;
			
		var R=8;			
		var C=9;		
		var cw=W/2;
		var ch=H/2;

		oDiv.innerHTML='';
		oDiv.style.background='url(images/'+pNext+'.jpg) center no-repeat scroll';   	//next()为1 一开始  pNext为2
		oDiv.style.backgroundSize = '100%'+' '+'100%';
		var aData=[];
		
		var wait=R*C;
		
		for(var i=0;i<R;i++){
			for(var j=0,k=0;j<C;j++,k++)
			{
				aData[i]={left: W*j/C, top: H*i/R};
				var oNewDiv=$('<div>');
				oNewDiv.css({
					position: 'absolute',					
					width:Math.ceil(W/C)+'px', 
					height: Math.ceil(H/R)+'px',
					background: 'url(images/'+(now+1)+'.jpg) '+-aData[i].left+'px '+-aData[i].top+'px no-repeat scroll',		
					left: aData[i].left+'px',
					top: aData[i].top+'px'	
				});

								
				oDiv.appendChild(oNewDiv[0]);
				
				var l=((aData[i].left+W/(2*C))-cw)*Utils.rnd(2,3)+cw-W/(2*C);
				var t=((aData[i].top+H/(2*R))-ch)*Utils.rnd(2,3)+ch-H/(2*R);
				
				setTimeout((function (oNewDiv,l,t){
					return function ()
					{
						fx.buffer(
							oNewDiv,
							{	left: oNewDiv.offsetLeft, 
								top: oNewDiv.offsetTop	,
								opacity: 100,
								x:0,
								y:0,
								z:0,
								scale:1,
								a:0
							},
							{	left: l,
								top: t,
								opacity: 0,
								x:Utils.rnd(-180, 180),
								y:Utils.rnd(-180, 180),
								z:Utils.rnd(-180, 180),
								scale:Utils.rnd(1.5, 3),
								a:1
							},
							function (now){								
								this.style.left=now.left+'px';
								this.style.top=now.top+'px';
								this.style.opacity=now.opacity/100;
								Utils.setStyle3(oNewDiv, 'transform', 'perspective(500px) rotateX('+now.x+'deg) rotateY('+now.y+'deg) rotateZ('+now.z+'deg) scale('+now.scale+')');
							}, function (){
								setTimeout(function (){
	/* 								oDiv.removeChild(oNewDiv); */
								}, 200);
								if(--wait==0)
								{
									ready=true;
									now=next();
								}
							}, 10
						);
					};
				})(oNewDiv[0],l,t), Utils.rnd(0, 200));
			}
		}
	});
	

//导航键向右也加点击事件（自定义增加的）
   $("#btn_explode_right").on("click",function(){
		
		if(!ready)return;
		ready=false;
			
		var R=8;
		var C=9;		
		var cw=W/2;
		var ch=H/2;
		
		oDiv.innerHTML='';
		oDiv.style.background='url(images/'+(next()+1)+'.jpg) center no-repeat scroll';
		oDiv.style.backgroundSize = '100%'+' '+'100%';
		var aData=[];
		
		var wait=R*C;
		
		for(var i=0;i<R;i++){
			for(var j=0,k=0;j<C;j++,k++)
			{
				aData[i]={left: W*j/C, top: H*i/R};
				var oNewDiv=$('<div>');
				oNewDiv.css({
					position: 'absolute',					
					width:Math.ceil(W/C)+'px', 
					height: Math.ceil(H/R)+'px',
					background: 'url(images/'+(now+1)+'.jpg) '+-aData[i].left+'px '+-aData[i].top+'px no-repeat scroll',		
					left: aData[i].left+'px',
					top: aData[i].top+'px'	
				});

								
				oDiv.appendChild(oNewDiv[0]);
				
				var l=((aData[i].left+W/(2*C))-cw)*Utils.rnd(2,3)+cw-W/(2*C);
				var t=((aData[i].top+H/(2*R))-ch)*Utils.rnd(2,3)+ch-H/(2*R);
				
				setTimeout((function (oNewDiv,l,t){
					return function ()
					{
						fx.buffer(
							oNewDiv,
							{	left: oNewDiv.offsetLeft, 
								top: oNewDiv.offsetTop	,
								opacity: 100,
								x:0,
								y:0,
								z:0,
								scale:1,
								a:0
							},
							{	left: l,
								top: t,
								opacity: 0,
								x:Utils.rnd(-180, 180),
								y:Utils.rnd(-180, 180),
								z:Utils.rnd(-180, 180),
								scale:Utils.rnd(1.5, 3),
								a:1
							},
							function (now){								
								this.style.left=now.left+'px';
								this.style.top=now.top+'px';
								this.style.opacity=now.opacity/100;
								Utils.setStyle3(oNewDiv, 'transform', 'perspective(500px) rotateX('+now.x+'deg) rotateY('+now.y+'deg) rotateZ('+now.z+'deg) scale('+now.scale+')');
							}, function (){
								setTimeout(function (){
	/* 								oDiv.removeChild(oNewDiv); */
								}, 200);
								if(--wait==0)
								{
									ready=true;
									now=next();
								}
							}, 10
						);
					};
				})(oNewDiv[0],l,t), Utils.rnd(0, 200));
			}
		}
	});	
	
});
//JQ end



var Utils = {
	setStyle :function(obj,json){
		if(obj.length)
			for(var i=0;i<obj.length;i++) Utils.setStyle(obj[i], json);
		else
		{
			if(arguments.length==2)
				for(var i in json) obj.style[i]=json[i];
			else
				obj.style[arguments[1]]=arguments[2];
		}
	},
	setStyle3 : function(obj, name, value){
		obj.style['Webkit'+name.charAt(0).toUpperCase()+name.substring(1)]=value;
		obj.style['Moz'+name.charAt(0).toUpperCase()+name.substring(1)]=value;
		obj.style['ms'+name.charAt(0).toUpperCase()+name.substring(1)]=value;
		obj.style['O'+name.charAt(0).toUpperCase()+name.substring(1)]=value;
		obj.style[name]=value;
	},
	rnd  : function(n,m){
	   return Math.random()*(m-n) + n ;
	}
}