How to use Extjs delegate pattern to add tooltip on Extjs toolbar - extjs4

Question

I used Extjs tool bar with many buttons.can i know how to apply tool tip for that buttons with delegate pattern

Answer 1

here my toolbar button
xtype: 'toolbar',
dock: 'top',
id: 'toolbar-id',
items: [
{
xtype: 'button1',
id: 'button-id1',
cls: 'tb-btn',
qtipText: 'tool tip description',
qtipTitle: 'tool tip title'
},
{
xtype: 'button2',
id: 'button-id2',
cls: 'tb-btn',
qtipText: 'tool tip description',
qtipTitle: 'tool tip title'
}
]
apply tooltip with using delegate pattern
render: function(Component, eOpts) {
Component.tip = Ext.create('Ext.tip.ToolTip', {
target: Component.el,
delegate: '.tb-btn',
renderTo: Ext.getBody(),
listeners: {
beforeshow: function updateTipBody(tip) {
var btnData = Component.getComponent(tip.triggerElement.id);
tip.update("<div class='tol-box'><h4 class='tool-tip-title'>" + btnData.qtipTitle + '</h4><p>' + btnData.qtipText + "</p></div>");
}
}
});
}

Answer 2

The code should be like this :
var store = Ext.create('Ext.data.ArrayStore', {
fields: ['company', 'price', 'change'],
data: [
['3m Co', 71.72, 0.02],
['Alcoa Inc', 29.01, 0.42],
['Altria Group Inc', 83.81, 0.28],
['American Express Company', 52.55, 0.01],
['American International Group, Inc.', 64.13, 0.31],
['AT&T Inc.', 31.61, -0.48]
]
});
var grid = Ext.create('Ext.grid.Panel', {
title: 'Array Grid',
store: store,
columns: [
{text: 'Company', flex: 1, dataIndex: 'company'},
{text: 'Price', width: 75, dataIndex: 'price'},
{text: 'Change', width: 75, dataIndex: 'change'}
],
height: 200,
width: 400,
renderTo: Ext.getBody()
});
grid.getView().on('render', function(view) {
view.tip = Ext.create('Ext.tip.ToolTip', {
// The overall target element.
target: view.el,
// Each grid row causes its own seperate show and hide.
delegate: view.itemSelector,
// Moving within the row should not hide the tip.
trackMouse: true,
// Render immediately so that tip.body can be referenced prior to the first show.
renderTo: Ext.getBody(),
listeners: {
// Change content dynamically depending on which element triggered the show.
beforeshow: function updateTipBody(tip) {
tip.update('Over company "' + view.getRecord(tip.triggerElement).get('company') + '"');
}
}
});
});
If you want more examples or details ,you can refer this Site.