jquery.pager.js分页实现详解

本文实例为大家分享了jquery.pager.js分页实现代码，供大家参考，具体内容如下

jquery.pager.js

/*
* jQuery pager plugin
* Version 1.0 (12/22/2008)
* @requires jQuery v1.2.6 or later
*
* Example at: http://jonpauldavies.github.com/JQuery/Pager/PagerDemo.html
*
* Copyright (c) 2008-2009 Jon Paul Davies
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Read the related blog post and contact the author at http://www.j-dee.com/2008/12/22/jquery-pager-plugin/
*
* This version is far from perfect and doesn't manage it's own state, therefore contributions are more than welcome!
*
* Usage: .pager({ pagenumber: 1, pagecount: 15, buttonClickCallback: PagerClickTest });
*
* Where pagenumber is the visible page number
*  pagecount is the total number of pages to display
*  buttonClickCallback is the method to fire when a pager button is clicked.
*
* buttonClickCallback signiture is PagerClickTest = function(pageclickednumber)
* Where pageclickednumber is the number of the page clicked in the control.
*
* The included Pager.CSS file is a dependancy but can obviously tweaked to your wishes
* Tested in IE6 IE7 Firefox & Safari. Any browser strangeness, please report.
*/
(function($) { 

 $.fn.pager = function(options) { 

  var opts = $.extend({}, $.fn.pager.defaults, options); 

  return this.each(function() { 

  // empty out the destination element and then render out the pager with the supplied options
   $(this).empty().append(renderpager(parseInt(options.pagenumber), parseInt(options.pagecount), options.buttonClickCallback)); 

   // specify correct cursor activity
   $('.pages li').mouseover(function() { document.body.style.cursor = "pointer"; }).mouseout(function() { document.body.style.cursor = "auto"; });
  });
 }; 

 // render and return the pager with the supplied options
 function renderpager(pagenumber, pagecount, buttonClickCallback) { 

  // setup $pager to hold render
  var $pager = $('<ul class="pages"></ul>'); 

  // add in the previous and next buttons
  $pager.append(renderButton('第一页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('上一页', pagenumber, pagecount, buttonClickCallback)); 

  // pager currently only handles 5 viewable pages ( could be easily parameterized, maybe in next version ) so handle edge cases
  var startPoint = 1;
  var endPoint = 5; 

  if (pagenumber > 2) {
   startPoint = pagenumber - 2;
   endPoint = pagenumber + 2;
  } 

  if (endPoint > pagecount) {
   startPoint = pagecount - 3;
   endPoint = pagecount;
  } 

  if (startPoint < 1) {
   startPoint = 1;
  } 

  // loop thru visible pages and render buttons
  for (var page = startPoint; page <= endPoint; page++) { 

   var currentButton = $('<li class="page-number">' + (page) + '</li>'); 

   page == pagenumber ? currentButton.addClass('pgCurrent') : currentButton.click(function() { buttonClickCallback(this.firstChild.data); });
   currentButton.appendTo($pager);
  } 

  // render in the next and last buttons before returning the whole rendered control back.
  $pager.append(renderButton('下一页', pagenumber, pagecount, buttonClickCallback)).append(renderButton('尾页', pagenumber, pagecount, buttonClickCallback)); 

  return $pager;
 } 

 // renders and returns a 'specialized' button, ie 'next', 'previous' etc. rather than a page number button
 function renderButton(buttonLabel, pagenumber, pagecount, buttonClickCallback) { 

  var $Button = $('<li class="pgNext">' + buttonLabel + '</li>'); 

  var destPage = 1; 

  // work out destination page for required button type
  switch (buttonLabel) {
   case "第一页":
    destPage = 1;
    break;
   case "上一页":
    destPage = pagenumber - 1;
    break;
   case "下一页":
    destPage = pagenumber + 1;
    break;
   case "尾页":
    destPage = pagecount;
    break;
  } 

  // disable and 'grey' out buttons if not needed.
  if (buttonLabel == "第一页" || buttonLabel == "上一页") {
   pagenumber <= 1 ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });
  }
  else {
   pagenumber >= pagecount ? $Button.addClass('pgEmpty') : $Button.click(function() { buttonClickCallback(destPage); });
  } 

  return $Button;
 } 

 // pager defaults. hardly worth bothering with in this case but used as placeholder for expansion in the next version
 $.fn.pager.defaults = {
  pagenumber: 1,
  pagecount: 1
 }; 

})(jQuery); 

Pager.css

#pager ul.pages {
display:block;
border:none;
text-transform:uppercase;
font-size:10px;
margin:10px 0 50px;
padding:0;
} 

#pager ul.pages li {
list-style:none;
float:left;
border:1px solid #ccc;
text-decoration:none;
margin:0 5px 0 0;
padding:5px;
} 

#pager ul.pages li:hover {
border:1px solid #003f7e;
} 

#pager ul.pages li.pgEmpty {
border:1px solid #eee;
color:#eee;
} 

#pager ul.pages li.pgCurrent {
border:1px solid #003f7e;
color:#000;
font-weight:700;
background-color:#eee;
} 

Java代码

 <html xmlns="http://www.w3.org/1999/xhtml">
<head>
 <title>jQuery.pager.js Test</title>
 <link href="Pager.css" rel="stylesheet" type="text/css" />
 <script src="jquery-1.2.6.js" type="text/javascript"></script>
 <script src="jquery.pager.js" type="text/javascript"></script>
 <script type="text/javascript" language="javascript"> 

  $(document).ready(function() {
   $("#pager").pager({ pagenumber: 1, pagecount: 15, buttonClickCallback: PageClick });
  }); 

  PageClick = function(pageclickednumber) {
   $("#pager").pager({ pagenumber: pageclickednumber, pagecount: 15, buttonClickCallback: PageClick });
   $("#result").html("Clicked Page " + pageclickednumber);
  } 

 </script>
</head>
<body>
<h1 id="result">Click the pager below.</h1>
<div id="pager" ></div>
</body>
</html> 

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