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用javascript实现较为通用的客户端分页组件

 2010-09-14 13:19:13 来源:WEB开发网   
核心提示:1、测试页面<html><head><script src="pageSystem.js"></script><script> var psys; window.onload = function() {psys = new PageSys

1、测试页面

<html>
<head>
<script src="pageSystem.js"></script>
<script>
  var psys;
  window.onload = function() {
  psys = new PageSystem(1120, "pageDiv", 10, showMsg); //总记录数, 分页系统容器,每组10页,回调
  psys.init();
 }
 
 function showMsg(currentPage, pageSize) {
  //回调方法自定义,两个参数,第一个为当前页,第二个为每页记录数
  /****************将currentPage和pageSize请求数据更新列表,最好使用ajax技术******************/
  alert("请求数据要的相应参数>> currentPage: "+ currentPage + " pageSize: " + pageSize);
 }

/*****如果要更新分页系统请如下操作******/

  //psys.update(count); [email protected] 为记录总数
  function updatePageSys() {
  
   psys.update(150); [email protected] 为记录总数
  }
 </script>
 <style>
  #pageDiv{
   font-size:13px;
  }
 </style>
</head>
<body>
 <div id="pageDiv">
 </div>
 <br/><br/>
 <a href="http://b1d.ddvip.com/index.php#" onclick="updatePageSys();"/>更新分页系统</a>
</body>
</html>

2、pageSystem.js

function PageSystem(count, divID, grountCount, callBack) {
   this.totolCount = count; //总记录数
   this.initMaxPage = grountCount? grountCount: 5; //显示页数,如 1 2 3 4 5
   this.pageSize = 10; //每页记录数
   this.currentMax = 0; //当前显示的最大页码, 如 1 2 3 4 5; 5为最大页码
   this.currentMin = 0; //当前显示的最小页码, 如 11 12 13 14 15; 11为最小页码
   this.homePage = 0; //首页
   this.endPage = 0; //未页
   this.currentPage = 0; //当前页
   this.currentActiveSpan; //当前活动a容器
   this.pageDivObj = document.getElementById(divID); //分页系统容器
   this.pages = 0; //总页数,计算得到
   //this._url = _url; //提交URL
   this.callBack = callBack; //回调
   var that = this; //指针的引用
  
  
   this.init = function() {
    this.pages = parseInt(this.totolCount / this.pageSize); //获得总共有几页
    this.pages = this.totolCount % this.pageSize == 0? this.pages: this.pages+1;
    this.createHomePage();
    this.createPrePage();
    var n = 1;
    while(n <= this.pages) {
     if(n > this.initMaxPage){
       break; //到达最大显示数
     }
     var _span = document.createElement("SPAN");
     _span.style.cssText = "margin-left:10px";
     if(n == 1) { //初始化时第一页为活动页
      _span.innerText = n;
      this.currentActiveSpan = _span;
     }else{
       var _a = document.createElement("A");
       _a.href = "#";
      _a.onclick = this.reView;
      _a.innerText = n;
      _span.appendChild(_a);
     }
     this.pageDivObj.appendChild(_span);
     n++;
    }
    if(this.pages != 0) {
     this.currentMax = n - 1; //当前组最大页码 1 2 3 4 5值为5
     this.currentMin = 1; //当前最小页码 1 2 3 4 5 值为1
     this.homePage = 1; //首页
     this.endPage = this.pages; //未页
     this.currentPage = 1; //当前页
    }
    //alert(this.currentMax);
    //alert(this.currentMin);
    this.createNextPage();
    this.createEndPage();
  
  };
  this.query = function() {
   var curPage = that.currentPage; //当前页
   var pageSize = that.pageSize;
   if(that.callBack) that.callBack(curPage, pageSize);
     
  };
  this.reView = function() {
   //重新渲染UI
    that.reViewActivePage();
    that.query();
  };
  this.reViewActivePage = function() {
   //重新渲染当前页视图
   var actA = event.srcElement; //当前被点击的 a对象
   var ap = actA.parentNode; //获得当前a容器span对象
   //还原当前页视图
    var _a = document.createElement("A");
    _a.href = "#";
    _a.onclick = this.reView;
    _a.innerText = that.currentActiveSpan.innerText;
    that.currentActiveSpan.innerText = "";
    that.currentActiveSpan.appendChild(_a);
    //渲染新的当前页视图
    that.currentActiveSpan = ap; //切换当前活动页容器
    var curPage = parseInt(actA.innerText);
    that.currentActiveSpan.removeChild(actA);
    that.currentActiveSpan.innerText = curPage;
    this.currentPage = curPage; //更改当前页码
    if(!that.toNextGroup()) that.toPreGroup();
  };
  this.toNextGroup = function() {
    //重新渲染显示页下一组 1 2 3 4 5 --> 5 6 7 8 9
    if(that.currentPage == that.currentMax) {//点击的页码为当前组最大页码,当go 下一组
     if(that.currentPage != that.endPage) { //如果点了未页当然不会再有下一组啦!
      that.pageDivObj.innerHTML = ""; [email protected]
      var pageCode = parseInt(that.currentPage) + 1; //显示页码
      var n = 2; //当前活动页不重创
      this.createHomePage();
      this.createPrePage();
      that.currentActiveSpan.innerText = that.currentPage;
      that.pageDivObj.appendChild(that.currentActiveSpan); //将当前活动页回放,[email protected]
      while(pageCode <= that.pages) {
      if(n > that.initMaxPage){
        break; //到达最大显示数
      }
      var _span = document.createElement("SPAN");
      _span.style.cssText = "margin-left:10px";
      var _a = document.createElement("A");
       _a.href = "#";
      _a.onclick = that.reView;
      _a.innerText = pageCode;
      _span.appendChild(_a);
      that.pageDivObj.appendChild(_span);
      pageCode++;
      n++;
     }
     that.currentMax = pageCode - 1;
     that.currentMin = that.currentPage;
     // alert("currentMax: " + that.currentMax);
     // alert("currentMin: " + that.currentMin);
     this.createNextPage();
     that.createEndPage();
     return true;
     }//end if
    }//end if
    return false;
  };
  this.toPreGroup = function() { //
   //重新渲染显示页上一组 5 6 7 8 9 -->1 2 3 4 5
   if(that.currentPage == that.currentMin) { //点了组中最小页码
    if(that.currentPage != 1) {
      that.pageDivObj.innerHTML = ""; [email protected]
      var pageCode = parseInt(that.currentPage) - (that.initMaxPage -1); //显示页码
      var n = 2; //当前活动页不重创
      this.createHomePage();
      this.createPrePage();
      while(true) {
      if(n > that.initMaxPage){
        break; //到达最大显示数
      }
      var _span = document.createElement("SPAN");
      _span.style.cssText = "margin-left:10px";
      var _a = document.createElement("A");
       _a.href = "#";
      _a.onclick = that.reView;
      _a.innerText = pageCode++;
      _span.appendChild(_a);
      that.pageDivObj.appendChild(_span);
      n++;
     }
     that.currentMax = that.currentPage;
     that.currentMin = pageCode - (that.initMaxPage -1);
     //alert("currentMax: " + that.currentMax);
     // alert("currentMin" + that.currentMin);
     that.currentActiveSpan.innerText = that.currentPage;
      that.pageDivObj.appendChild(that.currentActiveSpan); //将当前活动页回放,[email protected]
      that.createNextPage();
      that.createEndPage();
    }//end if
   }//end if
  };
   this.toHomePage = function(){
    //去到首页
    if(that.pages == 0) return;
    if(that.currentPage != 1) {//切组
     that.pageDivObj.innerHTML = "";
     that.init();
    }//end if
    that.currentPage = 1;
    that.currentMin = 1;
    that.currentMax = that.initMaxPage;
    that.query();
   };
   this.toEndPage = function() {
    //去到未页
    if(that.pages == 0 ||that.currentPage == that.pages) return;
    if(true) {//切组条件修改,此条件作废,临时设为true
    that.pageDivObj.innerHTML = "";
    that.createHomePage();
    that.createPrePage();
    var pageCode = 1;
   var n = 1;
   while(pageCode <= that.pages) {
    if(n > that.initMaxPage-1){
     n = 1;
    }
    n++;
    pageCode++;
   }
   
   pageCode = that.pages - (n-2);
   for(var j = 1; j < n; j++) {
     var _span = document.createElement("SPAN");
    _span.style.cssText = "margin-left:10px";
    if(pageCode == that.pages) { //初始化时第一页为活动页
    _span.innerText = pageCode;
    that.currentActiveSpan = _span;
    }else{
     var _a = document.createElement("A");
     _a.href = "#";
     _a.onclick = that.reView;
     _a.innerText = pageCode;
     _span.appendChild(_a);
     pageCode++;
    }
    that.pageDivObj.appendChild(_span);
   }
   
     that.createNextPage();
     that.createEndPage();
    }//end if
    that.currentPage = that.pages;
    that.currentMin = that.pages - (n-2);
    that.currentMax = that.pages;
   // alert("currentMin: " + that.currentMin);
    //alert("currentMax: " + that.currentMax);
   // alert("pages: " + that.pages);
    that.query();
   };
  
   this.next = function() {
    //下一页
   };
   this.pre = function() {
    //上一页
   };
   this.update = function(count) {
    //更新分页系统
    this.totolCount = count;
    that.pageDivObj.innerHTML = "";
    this.init();
   };
   this.createPrePage = function() {
    return;
    var _span = document.createElement("SPAN");
    _span.style.cssText = "margin-left:16px";
    var _a = document.createElement("A");
    _a.href = "#";
    _a.onclick = this.pre;
    _a.innerText = "上一页";
    _span.appendChild(_a);
    this.pageDivObj.appendChild(_span);
   };
   this.createNextPage = function() {
    return;
    var _span = document.createElement("SPAN");
    _span.style.cssText = "margin-left:16px";
    var _a = document.createElement("A");
    _a.href = "#";
    _a.onclick = this.next;
    _a.innerText = "下一页";
    _span.appendChild(_a);
    this.pageDivObj.appendChild(_span);
   };
   this.createHomePage = function() {
    var homeSpan = document.createElement("SPAN");
    var _a = document.createElement("A");
    _a.href = "#";
    _a.onclick = this.toHomePage;
    _a.innerText = "首页";
    homeSpan.appendChild(_a);
    this.pageDivObj.appendChild(homeSpan);
   };
   this.createEndPage = function() {
    var _span = document.createElement("SPAN");
    _span.style.cssText = "margin-left:16px";
    var _a = document.createElement("A");
    _a.href = "#";
    _a.onclick = this.toEndPage;
    _a.innerText = "未页(" + this.pages +")";
    _span.appendChild(_a);
    this.pageDivObj.appendChild(_span);
   }
  }

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