Extjs4 Treegrid 使用心得分享(经验篇)

<link rel="stylesheet" type="text/css" href="css/ext-all.css"> 
<script type="text/javascript" src="ext-all.js"></script> 
<script type="text/javascript" src="treegrid.js"></script> 
 
然后在页面的body中写上一个div 
 代码如下:

 <div id="tree-example"></div> 
 
以上官方就这么写的，BUT，蛋疼的是，JS里没有改，不改就没法运行成功。把treegrid.js中的renderto，改成我们的div的ID就行了。

记得把json数据文件和css文件等拷贝到调用目录下。 
完成的treegrid.js代码为： 
 代码如下:

/* 
This file is part of Ext JS 4 
Copyright (c) 2011 Sencha Inc 
Contact: http://www.sencha.com/contact 
GNU General Public License Usage 
This file may be used under the terms of the GNU General Public License version 3.0 as published by the Free Software Foundation and appearing in the file LICENSE included in the packaging of this file. Please review the following information to ensure the GNU General Public License version 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html. 
If you are unsure which license is appropriate for your use, please contact the sales department at http://www.sencha.com/contact. 
*/ 
Ext.require([ 
'Ext.data.*', 
'Ext.grid.*', 
'Ext.tree.*' 
]); 
Ext.onReady(function() { 
//we want to setup a model and store instead of using dataUrl 
Ext.define('Task', { 
extend: 'Ext.data.Model', 
fields: [ 
{name: 'task', type: 'string'}, 
{name: 'user', type: 'string'}, 
{name: 'duration', type: 'string'} 
] 
}); 
var store = Ext.create('Ext.data.TreeStore', { 
model: 'Task', 
proxy: { 
type: 'ajax', 
//the store will get the content from the .json file 
url: 'treegrid.json' 
}, 
folderSort: true 
}); 
//Ext.ux.tree.TreeGrid is no longer a Ux. You can simply use a tree.TreePanel 
var tree = Ext.create('Ext.tree.Panel', { 
title: 'Core Team Projects', 
width: 500, 
height: 300, 
renderTo: 'tree-example',//2B的官方和SV党们，这里竟然是getbody，bo你妹啊。 
collapsible: true, 
useArrows: true, 
rootVisible: false, 
store: store, 
multiSelect: true, 
singleExpand: true, 
//the 'columns' property is now 'headers' 
columns: [{ 
xtype: 'treecolumn', //this is so we know which column will show the tree 
text: 'Task', 
flex: 2, 
sortable: true, 
dataIndex: 'task' 
},{ 
//we must use the templateheader component so we can use a custom tpl 
xtype: 'templatecolumn', 
text: 'Duration', 
flex: 1, 
sortable: true, 
dataIndex: 'duration', 
align: 'center', 
//add in the custom tpl for the rows 
tpl: Ext.create('Ext.XTemplate', '{duration:this.formatHours}', { 
formatHours: function(v) { 
if (v < 1) { 
return Math.round(v * 60) + ' mins'; 
} else if (Math.floor(v) !== v) { 
var min = v - Math.floor(v); 
return Math.floor(v) + 'h ' + Math.round(min * 60) + 'm'; 
} else { 
return v + ' hour' + (v === 1 ? '' : 's'); 
} 
} 
}) 
},{ 
text: 'Assigned To', 
flex: 1, 
dataIndex: 'user', 
sortable: true 
}] 
}); 
});