JavaScript DHTML/Ext JS/ScriptTagProxy

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Setup Ext.data.Store and new Ext.data.ScriptTagProxy

  
<!--
/*!
 * 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/SearchField.js"></script>
</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 ds = new Ext.data.Store({
        proxy: new Ext.data.ScriptTagProxy({
            url: "http://extjs.ru/forum/topics-remote.php"
        }),
        reader: new Ext.data.JsonReader({
            root: "topics",
            totalProperty: "totalCount",
            id: "post_id"
        }, [
            {name: "postId", mapping: "post_id"},
            {name: "title", mapping: "topic_title"},
            {name: "topicId", mapping: "topic_id"},
            {name: "author", mapping: "author"},
            {name: "lastPost", mapping: "post_time", type: "date", dateFormat: "timestamp"},
            {name: "excerpt", mapping: "post_text"}
        ]),
        baseParams: {limit:20, forumId: 4}
    });
    // Custom rendering Template for the View
    var resultTpl = new Ext.XTemplate(
        "<tpl for=".">",
        "<div class="search-item">",
            "<h3><span>{lastPost:date("M j, Y")}<br />by {author}</span>",
            "<a href="http://extjs.ru/forum/showthread.php?t={topicId}&p={postId}" target="_blank">{title}</a></h3>",
            "<p>{excerpt}</p>",
        "</div></tpl>"
    );
    var panel = new Ext.Panel({
        applyTo: "search-panel",
        title:"Forum Search",
        height:300,
        autoScroll:true,
        items: new Ext.DataView({
            tpl: resultTpl,
            store: ds,
            itemSelector: "div.search-item"
        }),
        tbar: [
            "Search: ", " ",
            new Ext.ux.form.SearchField({
                store: ds,
                width:320
            })
        ],
        bbar: new Ext.PagingToolbar({
            store: ds,
            pageSize: 20,
            displayInfo: true,
            displayMsg: "Topics {0} - {1} of {2}",
            emptyMsg: "No topics to display"
        })
    });
    ds.load({params:{start:0, limit:20, forumId: 4}});
});
</script> 
<div style="width:600px;" id="search-panel">
</div>
</body>
</html>



Use a ScriptTagProxy to fetch cross-domain remote 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>
</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(){
    // create the Data Store
    var store = new Ext.data.JsonStore({
        root: "topics",
        totalProperty: "totalCount",
        idProperty: "threadid",
        remoteSort: true,
        fields: [
            "title", "forumtitle", "forumid", "author",
            {name: "replycount", type: "int"},
            {name: "lastpost", mapping: "lastpost", type: "date", dateFormat: "timestamp"},
            "lastposter", "excerpt"
        ],
        // load using script tags for cross domain, if the data in on the same domain as
        // this page, an HttpProxy would be better
        proxy: new Ext.data.ScriptTagProxy({
            url: "http://extjs.ru/forum/topics-browse-remote.php"
        })
    });
    store.setDefaultSort("lastpost", "desc");

    // pluggable renders
    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"]);
    }
    var grid = new Ext.grid.GridPanel({
        width:700,
        height:500,
        title:"ExtJS.ru - Browse Forums",
        store: store,
        trackMouseOver:false,
        disableSelection:true,
        loadMask: true,
        // grid columns
        columns:[{
            id: "topic", // id assigned so we can apply custom css (e.g. .x-grid-col-topic b { color:#333 })
            header: "Topic",
            dataIndex: "title",
            width: 420,
            renderer: renderTopic,
            sortable: true
        },{
            header: "Author",
            dataIndex: "author",
            width: 100,
            hidden: true,
            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
        }],
        // customize view config
        viewConfig: {
            forceFit:true,
            enableRowBody:true,
            showPreview:true,
            getRowClass : function(record, rowIndex, p, store){
                if(this.showPreview){
                    p.body = "<p>"+record.data.excerpt+"</p>";
                    return "x-grid3-row-expanded";
                }
                return "x-grid3-row-collapsed";
            }
        },
        // paging bar on the bottom
        bbar: new Ext.PagingToolbar({
            pageSize: 25,
            store: store,
            displayInfo: true,
            displayMsg: "Displaying topics {0} - {1} of {2}",
            emptyMsg: "No topics to display",
            items:[
                "-", {
                pressed: true,
                enableToggle:true,
                text: "Show Preview",
                cls: "x-btn-text-icon details",
                toggleHandler: function(btn, pressed){
                    var view = grid.getView();
                    view.showPreview = pressed;
                    view.refresh();
                }
            }]
        })
    });
    // render it
    grid.render("topic-grid");
    // trigger the data store load
    store.load({params:{start:0, limit:25}});
});
</script>
<div id="topic-grid"></div>
</body>
</html>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Ext_JS/ScriptTagProxy&oldid=2427»