• 照片墙


    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns=" http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>照片墙一多实例演示</title>
    <style type="text/css">
    body,div,h2,ul,li{margin:0;padding:0;}
    body{font:12px/1.5 Arail;}
    .box{860px;margin:10px auto;background:#eee;border:1px solid #b8b8b8;overflow:hidden}
    .title{height:30px;line-height:30px;font-size:14px;padding:0 15px 0 35px;border-bottom:1px solid #b8b8b8;background:#fafafa url( http://js.alixixi.com/img/mm/ico.gif) 5px 50% no-repeat;}
    .title span{float:left;}
    .title a{float:right;color:#06f;outline:none;}
    .title a:hover{color:red;}
    .box ul{float:left;padding:0 15px 15px 0;}
    .box li{float:left;140px;height:105px;padding:6px;background:#fff;border:1px solid #c3c3c3;display:inline;margin:15px 0 0 15px;list-style:none;}
    .box li img{float:left;140px;height:105px;}
    .box li.hig{padding:5px;border:2px dashed #f30;opacity:0.5;filter:alpha(opacity=50);}
    </style>
    <script type="text/javas cript">
    //获取ID
    var $ = function (id) {return typeof id === "string" ? document.getElementById(id) : id};
    //获取tagName
    var $$ = function (tagName, oParent) {return (oParent || document).getElementsByTagName(tagName)};
    //获取class
    var $$$ = function (sClass, oParent) {
     var aClass = [],
     i = 0,
     reClass = new RegExp("(\\s|^)" + sClass + "($|\\s)"),
     aElement = $$("*", oParent);
     for (i = 0; i < aElement.length; i++)reClass.test(aElement[i].className) && aClass.push(aElement[i]);
     return aClass
    };
    //获取元素位置
    function getPos(obj) {
     var iTop = obj.offsetTop;
     var iLeft = obj.offsetLeft;
     while (obj.offsetParent)
     {
      iTop += obj.offsetParent.offsetTop;
      iLeft += obj.offsetParent.offsetLeft;
      obj = obj.offsetParent;
     }
     return {top:iTop, left:iLeft}
    };
    //创建照片墙对象
    var PhotoWall = function () {this.initialize.apply(this, arguments)};
    PhotoWall.prototype = {
     initialize: function (obj, aData)
     {
      var oThis = this;
      this.oParent = $(obj);
      this.oUl = $$("ul", this.oParent)[0];
      this.oBtn = $$("a", this.oParent)[0];
      this.zIndex = 1;
      this.aPos = [];
      this.aData = aData;
      this.dom = document.documentElement || document.body;
      this.create();
      this.oBtn.on click = function () {oThis.randomOrder()}
     },
     create: function ()
     {
      var aFrag = document.createDocumentFragment();
      var i = 0;
      for (i = 0; i < this.aData.length; i++)
      {
       var oLi = document.createElement("li");
       var oImg = document.createElement("img");
       oImg.src = this.aData[i];
       oLi.appendChild(oImg);
       aFrag.appendChild(oLi)
      }
      this.oUl.appendChild(aFrag);
      this.aLi = $$("li", this.oParent);
      this.changeLayout()
     },
     changeLayout: function ()
     {
      var i = 0;
      this.oParent.style.height = this.oParent.offsetHeight - 2 + "px";
      this.aPos.length = 0;
      for (i = 0; i < this.aLi.length; i++) this.aLi[i].style.cssText = "";
      for (i = 0; i < this.aLi.length; i++)
      {
       this.aLi[i].index = i;
       this.aLi[i].style.top = getPos(this.aLi[i]).top + "px";
       this.aLi[i].style.left = getPos(this.aLi[i]).left + "px";
       this.aPos.push({left:getPos(this.aLi[i]).left, top:getPos(this.aLi[i]).top})
      }
      for (i = 0; i < this.aLi.length; i++)
      {
       this.aLi[i].style.position = "absolute";
       this.aLi[i].style.margin = "0";  
       this.drag(this.aLi[i])
      }
     },
     drag: function (obj, handle)
     {
      var oThis = this;
      var handle = handle || obj;
      handle.style.cursor = "move";
      handle.on mousedown = function (event)
      {
       var event = event || window.event;
       var disX = event.clientX - this.offsetLeft;
       var disY = event.clientY - this.offsetTop;
       var oN ear = null;
       handle.style.zIndex = oThis.zIndex++;
      
       document.on mousemove = function (event)
       {
        var event = event || window.event;
        var iL = event.clientX - disX;
        var iT = event.clientY - disY;
        var maxL = Math.max(oThis.dom.clientWidth, oThis.dom.scrollWidth) - handle.offsetWidth;
        var maxT = Math.max(oThis.dom.clientHeight, oThis.dom.scrollHeight) - handle.offsetHeight;
       
        iL < 0 && (iL = 0);
        iT < 0 && (iT = 0);
        iL > maxL && (iL = maxL);
        iT > maxT && (iT = maxT);
          
        handle.style.left = iL + "px";
        handle.style.top = iT + "px";
       
        oN ear = oThis.findNearest(obj);
       
        for (var i = 0; i < oThis.aLi.length; i++) oThis.aLi[i].className = "";
       
        oN ear && (oN ear.className = "hig");
       
        return false
       };
       document.on mouseup = function ()
       {
        document.on mousemove = null;
        document.on mouseup = null;
       
        if (oN ear)
        {
         handle.index = [handle.index, oN ear.index];
         oN ear.index = handle.index[0];
         handle.index = handle.index[1];
         oN ear.style.zIndex = oThis.zIndex++;
         oThis.doMove(handle, oThis.aPos[handle.index]);
         oThis.doMove(oN ear, oThis.aPos[oN ear.index]);    
         oN ear.className = "";
        }
        else
        {
         oThis.doMove(handle, oThis.aPos[handle.index])
        }
       
        handle.releaseCapture && handle.releaseCapture()
       };
       this.setCapture && this.setCapture();
       return false
      };
     },
     doMove: function (obj, iTarget, callback)
     {
      var oThis = this;
      clearInterval(obj.timer);
      obj.timer = setInterval(function ()
      {
       var iCurL = getPos(obj).left;
       var iCurT = getPos(obj).top;
       var iSpeedL = (iTarget.left - iCurL) / 5;
       var iSpeedT = (iTarget.top - iCurT) / 5;
       iSpeedL = iSpeedL > 0 ? Math.ceil(iSpeedL) : Math.floor(iSpeedL);
       iSpeedT = iSpeedT > 0 ? Math.ceil(iSpeedT) : Math.floor(iSpeedT);
      
       if (iCurL == iTarget.left && iCurT == iTarget.top)
       {
        clearInterval(obj.timer);
        callback && callback()
       }
       else
       {
        obj.style.left = iCurL + iSpeedL + "px";
        obj.style.top = iCurT + iSpeedT + "px"
       }
      }, 30)
     },
     findNearest: function (obj)
     {
      var aDistance = [];
      var i = 0;
      for (i = 0; i < this.aLi.length; i++) aDistance[i] = this.aLi[i] == obj ? Number.MAX_VALUE : this.getDistance(obj, this.aLi[i]);
     
      var minNum = Number.MAX_VALUE;
      var minIndex = -1;
      for (i = 0; i < aDistance.length; i++) aDistance[i] < minNum && (minNum = aDistance[i], minIndex = i);
     
      return this.isButt(obj, this.aLi[minIndex]) ? this.aLi[minIndex] : null
     },
     getDistance: function(obj1, obj2)
     {
      var a = (obj1.offsetLeft + obj1.offsetWidth / 2) - (obj2.offsetLeft + obj2.offsetWidth / 2);
      var b = (obj1.offsetTop + obj1.offsetTop / 2) - (obj2.offsetTop + obj2.offsetTop / 2);
      return Math.sqrt(a * a + b * b)
     },
     isButt: function (obj1, obj2)
     {
      var l1 = obj1.offsetLeft;
      var t1 = obj1.offsetTop;
      var r1 = l1 + obj1.offsetWidth;
      var b1 = t1 + obj1.offsetHeight;
     
      var l2 = obj2.offsetLeft;
      var t2 = obj2.offsetTop;
      var r2 = l2 + obj2.offsetWidth;
      var b2 = t2 + obj2.offsetHeight;
     
      return !(r1 < l2 || b1 < t2 || r2 < l1 || b2 < t1)
     },
     randomOrder: function ()
     {
      this.aPos.sort(function () {return Math.random() > 0.5 ? 1 : -1});
      for (var i = 0; i < this.aLi.length; i++)
      {
       this.aLi[i].index = i;
       this.doMove(this.aLi[i], this.aPos[i])
      }
     }
    };
    window.on load = function ()
    {
     var aBox = $$$("box");
     var aData = [];
     var aExample = [];
     var i = 0;
     //生成图片数据
     for (i = 0; i < 20; i++) aData[aData.length] = " http://js.alixixi.com/img/mm/" + i + ".jpg";
     //循环创建多个实例
     for (i = 0; i < aBox.length; i++)
     {
      var oExample = new PhotoWall(aBox[i], aData);
      aExample.push(oExample)
     }
     this.on resize = function ()
     {
      for (var p in aExample) aExample[p].changeLayout()
     };
     this.on resize()
    };
    </script>
    </head>
    <body>
    <div class="box">
        <h2 class="title"><span>一堆90后</span><a href="javas cript:;" class="order">随机排序</a></h2>
        <ul></ul>
    </div>
    <div class="box">
        <h2 class="title"><span>一堆90后</span><a href="javas cript:;" class="order">随机排序</a></h2>
        <ul></ul>
    </div>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/wybshyy/p/16042736.html
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