ExtJs Grid BufferRenderer doesnot display the grid rows - extjs

Question

I want to implement grid bufferrenderer in my simple grid panel that shows a list of information using ExtJS 4.2.1. Without using the bufferrenderer plugin, it shows all the data, but when i used this plugin, my grid contains no data.
This is my grid without using the plugin
This is my grid using the plugin
The grid panel's code is:
Ext.define('MyApp.view.MyPanel', {
extend: 'Ext.panel.Panel',
itemId: 'myPanel',
title: '',
requires: ['Ext.grid.plugin.BufferedRenderer'],
initComponent: function() {
var me = this;
Ext.applyIf(me, {
items: [
{
xtype: 'gridpanel',
autoRender: true,
autoShow: true,
itemId: 'gridPanel',
title: 'My Grid Panel',
store: 'MyJsonStore',
columns: [
{
xtype: 'gridcolumn',
dataIndex: 'id',
text: 'Id'
},
{
xtype: 'gridcolumn',
dataIndex: 'firstName',
text: 'FirstName'
},
{
xtype: 'gridcolumn',
dataIndex: 'middleName',
text: 'MiddleName'
},
{
xtype: 'gridcolumn',
dataIndex: 'lastName',
text: 'LastName'
},
{
xtype: 'gridcolumn',
dataIndex: 'age',
text: 'Age'
},
{
xtype: 'gridcolumn',
dataIndex: 'country',
text: 'Country'
},
{
xtype: 'gridcolumn',
dataIndex: 'city',
text: 'City'
},
{
xtype: 'gridcolumn',
dataIndex: 'street',
text: 'Street'
},
{
xtype: 'gridcolumn',
dataIndex: 'mobile',
text: 'Mobile'
},
{
xtype: 'gridcolumn',
dataIndex: 'phone',
text: 'Phone'
},
{
xtype: 'gridcolumn',
dataIndex: 'zip',
text: 'Zip'
}
],
plugins: 'bufferedrenderer'
/*plugins: {
ptype: 'bufferedrenderer',
trailingBufferZone: 20,
leadingBufferZone: 25
}*/
}
]
});
me.callParent(arguments);
}
});
The Store's code is:
Ext.define('MyApp.store.MyJsonStore', {
extend: 'Ext.data.Store',
requires: [
'MyApp.model.GridModel'
],
constructor: function(cfg) {
var me = this;
cfg = cfg || {};
me.callParent([Ext.apply({
autoLoad: true,
model: 'MyApp.model.GridModel',
storeId: 'MyJsonStore',
buffered: true,
clearOnPageLoad: false,
clearRemovedOnLoad: false,
leadingBufferZone: 25,
pageSize: 500,
purgePageCount: 10,
trailingBufferZone: 20,
proxy: {
type: 'ajax',
url: 'data/users.json',
reader: {
type: 'json',
root: 'users',
totalProperty: 'total_user'
}
}
}, cfg)]);
}
});
Can anyone help me with this? Thanks

Answer 1

Setting the height property in grid will fix this issue.
height: 300

Answer 2

Make sure that all panels up to the viewport have their layout set to “fit”. Also, region of the grid should be “center”.
I have not tested, but something like this should work:
var grid = Ext.create('MyApp.view.MyPanel', {
layout: 'fit',
region: 'center'
});
var viewport = Ext.create('Ext.container.Viewport', {
renderTo: Ext.getBody(),
items: [
grid
]
});