Extjs4 自定义组件

     Ext.onReady (function () {
 
     Ext.define ('MydesktopIcon', {
             /* Begin Definitions */
             alias: 'widget.desktopIcon',
             extend: 'Ext.Component',
 
             width: 76,
             //height: 84,
             overCls: 'x-view-over',
             renderTpl:
                 '<div class="ux-desktop-shortcut" id="{module}-shortcut">' +
                 '<div class="ux-desktop-shortcut-icon">' +
                     '<img src="{iconName}" title="{name}">' +'sssssssssss'+'{name}'+
                 '</div>' +
                 '<span class="ux-desktop-shortcut-text">{name}</span>' +
                 '</div>' +
                 '<div class="x-clear"></div>',
 
             // private
             onRender: function(ct, position) {
                 // classNames for the button
                 var me = this;
                  // Render internal structure
                 me.callParent(arguments);
                 //添加单击事件
                 alert('dddddd');
                 alert(me.name);
                 me.mon(me.el, 'click', me.onClick, me);
             },
             getTemplateArgs: function () {
                 var me = this;
                 return {
                    name: me.name || ' ',
                    module: me.module || ' ',
                    iconName: me.iconName || Ext.BLANK_IMAGE_URL,
                 }
             },
             onClick: function(e) {
                     var me = this;
                     me.ownerCt.fireEvent ('itemClick', this);
                 },
 
             // inherit docs
                 initComponent: function() {
                     alert('dd');
                     var me = this;
                     Ext.applyIf(me.renderData, me.getTemplateArgs());
                    // me.callParent(arguments);
 
             },
         });
 
     Ext.create ('Ext.panel.Panel', {
             title:'test',
             frame: true,
             height:800,
             renderTo: Ext.getBody(),
             items: [{
                         xtype: 'desktopIcon',
                         name:'首页',
                         module:'firstPage',
                         iconName: '../SDOJ/images/problems.png'
                     },{
                         xtype: 'desktopIcon',
                         name:'个人信息',
                         module:'firstPage',
                         iconName: '../SDOJ/images/myself.png'
                 },{
                         xtype: 'desktopIcon',
                         name:'首页',
                         module:'firstPage',
                         iconName: '../SDOJ/images/firstpage.png'
                     },{
                         xtype: 'desktopIcon',
                         name:'首页',
                         module:'firstPage',
                         iconName: '../SDOJ/images/contest.png'
                 },
                 {
                         xtype: 'desktopIcon',
                         name:'首页',
                         module:'firstPage',
                         iconName: '../SDOJ/images/college.png'
                     },{
                         xtype: 'desktopIcon',
                         name:'首页',
                         module:'firstPage',
                         iconName: '../SDOJ/images/letter.png'
                 }],
             listeners: {
                 itemClick: function (item) {
                     alert (item.name)
                 }
             }
 
         });
 
 });