JavaScript DHTML/Ext JS/BufferView

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Use Ext.ux.grid.BufferView to hold the data

  
<!--
/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.ru
 * http://www.extjs.ru/license
 */
-->
<html>
<head>
<title>Hello World Window</title>
<link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" />
<script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext-3.0.0/ext-all.js"></script>
<script type="text/javascript" src="ext-3.0.0/examples/ux/BufferView.js"></script>
  <style type="text/css">
  .x-grid3-td-topic b {
      font-family:tahoma, verdana;
      display:block;
    overflow:hidden;
    width:98%;
    text-overflow:ellipsis;
  }
  .x-grid3-td-topic b i {
      font-weight:normal;
      font-style: normal;
      color:#000;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .x-grid3-td-topic .x-grid3-cell-inner {
      white-space: nowrap;
  }
  </style>
</head>
<!-- Revised from demo code in ext3.0.0 -->
<body>
<script type="text/javascript">
/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.ru
 * http://www.extjs.ru/license
 */
Ext.onReady(function(){
    var store = new Ext.data.Store({
        remoteSort: true,
        baseParams: {lightWeight:true,ext: "js"},
        sortInfo: {field:"lastpost", direction:"DESC"},
        autoLoad: {params:{start:0, limit:500}},
        proxy: new Ext.data.ScriptTagProxy({
            url: "http://extjs.ru/forum/topics-browse-remote.php"
        }),
        reader: new Ext.data.JsonReader({
            root: "topics",
            totalProperty: "totalCount",
            idProperty: "threadid",
            fields: [
                "title", "forumtitle", "forumid", "author",
                {name: "replycount", type: "int"},
                {name: "lastpost", mapping: "lastpost", type: "date", dateFormat: "timestamp"},
                "lastposter", "excerpt"
            ]
        })
    });
    var grid = new Ext.grid.GridPanel({
        renderTo: "topic-grid",
        width:700,
        height:500,
        frame:true,
        title:"ExtJS.ru - Browse Forums",
        trackMouseOver:false,
    autoExpandColumn: "topic",
        store: store,
        columns: [new Ext.grid.RowNumberer({width: 30}),{
            id: "topic",
            header: "Topic",
            dataIndex: "title",
            width: 420,
            renderer: renderTopic,
            sortable:true
        },{
            header: "Replies",
            dataIndex: "replycount",
            width: 70,
            align: "right",
            sortable:true
        },{
            id: "last",
            header: "Last Post",
            dataIndex: "lastpost",
            width: 150,
            renderer: renderLast,
            sortable:true
        }],
      bbar: new Ext.PagingToolbar({
        store: store,
        pageSize:500,
        displayInfo:true
      }),
      view: new Ext.ux.grid.BufferView({
        // custom row height
        rowHeight: 34,
        // render rows as they come into viewable area.
        scrollDelay: false
      })
    });

    // render functions
    function renderTopic(value, p, record){
        return String.format(
                "<b><a href="http://extjs.ru/forum/showthread.php?t={2}" target="_blank">{0}</a></b><a href="http://extjs.ru/forum/forumdisplay.php?f={3}" target="_blank">{1} Forum</a>",
                value, record.data.forumtitle, record.id, record.data.forumid);
    }
    function renderLast(value, p, r){
        return String.format("{0}<br/>by {1}", value.dateFormat("M j, Y, g:i a"), r.data["lastposter"]);
    }
});

</script> 
<div id="topic-grid"></div>
</body>
</html>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Ext_JS/BufferView&oldid=2305»