Extjs4 Treegrid usage experience sharing (experience)_extjs

I recently debugged the treegrid instance of EXTJS 4 and read many articles and official demos. None of them were reliable and could not be displayed. For coders like us who are accustomed to using C, EXTJS is simply maintained by a group of anarchic bandits. There is not even a search box on the official website. Finding information basically relies on traversal, which is still manual.

To use treegrid, you need to load the following files in the head of the calling page:

Copy the code The code is as follows :

<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>

Then write a div in the body of the page

Copy the code The code is as follows:

<div id="tree-example"></div>

That’s what the above official said, BUT, the trouble is, there is no change in JS, if you don’t change it, it will be gone The method runs successfully. Just change renderto in treegrid.js to the ID of our div.

Remember to copy the json data files and css files to the calling directory.
The completed treegrid.js code is:

Copy the code The code is as follows:

/ *
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’s official and SV parties , this is actually getbody, bo your sister.
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
}]
});
});