click listener for tab panel in EXTJS - extjs

Question

i use a tab panel in extjs. I want to display an alert when clicked on a tab. But i am not sure how.
This is what i do now:
{
xtype: 'tabpanel',
activeTab: 0,
region: 'center',
items: [
{
xtype: 'panel',
title: 'All',
items: [grid]
},
{
xtype: 'panel',
title: 'Closed'
},
{
xtype: 'panel',
title: 'Open'
}
],
listeners: {
click: function () {
alert('test');
}
}
}
How can is display All, Closed or Open when there is clicked on that tab?

Answer 1

There is no event for tab click in TabPanel, however you can bind into click event on each tab:
Ext.createWidget('tabpanel', {
items: [...],
listeners: {
render: function() {
this.items.each(function(i){
i.tab.on('click', function(){
alert(i.title);
});
});
}
}
});
Notice: this is ExtJS 4 based code.

Answer 2

I manage to do this by using tabchange event. In example below I used newCard.xtype property where value of xtype (i.e. task-archive) is just my panel with controls and corresponding xtype property.
Ext.define('ComplexBrigade.controller.taskArchive.TaskArchive', {
extend: 'Ext.app.Controller',
init: function() {
this.control({
'#tabWorks': {
tabchange: this.doTest
}
});
},
doTest: function ( tabPanel, newCard, oldCard, eOpts) {
switch (newCard.xtype) {
case "task-archive":
console.log("task-archive");
break;
case "task-creation":
console.log("task-creation");
break;
}
}
});