TabGroup window blur and focus

app.js

var tabGroup = Ti.UI.createTabGroup();

var win1 = Ti.UI.createWindow({
	backgroundColor: 'blue'
});
win1.addEventListener('blur', function(e){
	Ti.API.info('blur');
});
win1.addEventListener('focus', function(e){
	Ti.API.info('focus');
});
var openButton = Ti.UI.createButton({
	title:'open',
	height: 50,
	width: 200
});
win1.add(openButton);

openButton.addEventListener('click', function(e){
	var win2 = Ti.UI.createWindow({
		backgroundColor: 'red'
	});
	var closeButton = Ti.UI.createButton({
		title: 'close',
		height: 50,
		width: 200
	});
	closeButton.addEventListener('click', function(e){
		win2.close();
	})
	win2.add(closeButton);
	tab1.open(win2);
});

var tab1 = Ti.UI.createTab({
	window: win1
});
tabGroup.addTab(tab1);
tabGroup.open();