animation.js

var win = Titanium.UI.currentWindow;

var viewTaskbar = Ti.UI.createView({
	backgroundColor:'#D4D4D4',
	borderRadius: 4,
	height:22,
	right:0,
	top:0,
	width:200,
	zIndex: 30
});

win.add(viewTaskbar);

var viewInnerTaskbar = Ti.UI.createView({
	backgroundColor:'#D4D4D4',
	borderRadius: 4,
	height:20,
	right:1,
	top:2,
	width:20,
	zIndex: 30
});

viewTaskbar.add(viewInnerTaskbar);

var transformRotateAntiClockwise = Ti.UI.create2DMatrix();
transformRotateAntiClockwise = transformRotateAntiClockwise.rotate(-180);

var transformRotateClockwise = Ti.UI.create2DMatrix();
transformRotateClockwise = transformRotateClockwise.rotate(180);

var animateRotateAntiClockwise = Ti.UI.createAnimation();
animateRotateAntiClockwise.transform = transformRotateAntiClockwise;
animateRotateAntiClockwise.delay = 10;
animateRotateAntiClockwise.duration = 3000;

var animateRotateClockwise = Ti.UI.createAnimation();
animateRotateClockwise.transform = transformRotateClockwise;
animateRotateClockwise.delay = 10;
animateRotateClockwise.duration = 3000;

var imageViewTaskbar = Ti.UI.createImageView({
	anchorPoint:{x:0.5, y:0.5},
	image: '/taskbar-menu-icon2.png',
	height: 'auto',
	top:0,
	right:0,
	width: 'auto',
	zIndex: 31
});

viewInnerTaskbar.add(imageViewTaskbar);

var taskbarEnabled = true; 
viewInnerTaskbar.addEventListener('click', function(){
	if(taskbarEnabled === true){
		Ti.API.info('Firing anticlockwise animation');
		viewTaskbar.animate(animateRotateAntiClockwise);
		taskbarEnabled = false;
	} else {
		Ti.API.info('Firing clockwise animation');
		viewTaskbar.animate(animateRotateClockwise);
		taskbarEnabled = true;
	}
});