Android Vertical Slider

app.js

var win = Ti.UI.createWindow();

var container = Ti.UI.createView({
  height:260,
	width:30
})

var slider = Ti.UI.createView({
	height:200,
	width:20,
	backgroundColor:'blue',
	top:30
});

var button = Ti.UI.createView({
	borderRadius:15,
	height:30,
	width:30,
	top:15,
	backgroundColor:'gray'
});

var label = Ti.UI.createLabel({
	bottom:5,
	color:'white'
});

var value = 0;

container.add(slider)
container.add(button);
win.add(label);
win.add(container);

button.addEventListener('touchmove', function(evt){
	var point = button.convertPointToView({ x: evt.x, y: evt.y }, container);	
   	
   	if(point.y>15 && point.y<215){
   		button.top = point.y;
   		value = point.y-15
   		label.text=value;
   	}
});

win.open();