app.js

//// ---- Menu window, positioned on the left
var menuWindow = Ti.UI.createWindow({
	top:0,
	left:0,
	width:150
});
menuWindow.open();

//// ---- Menu Table
// Menu Titles
var menuTitles = [
	{title: 'Menu 1'},
	{title: 'Menu 2'},
	{title: 'Menu 3'},
	{title: 'Menu 4'},
	{title: 'Menu 5'},
	{title: 'Menu 6'}
];
// Tableview
var tableView = Ti.UI.createTableView({
	data:menuTitles
});
menuWindow.add(tableView);

//// ---- Window with navigationGroup
var navWindow = Ti.UI.createWindow({
	width:320 // Set the width of the sliding window to avoid cut out from animation
});
navWindow.open();
// Main window
var win = Ti.UI.createWindow({
	title:'Main Window',
	backgroundColor:'#28292c',
	barColor:'#28292c',
	moving:false, // Custom property for movement
	axis:0 // Custom property for X axis
});
// NavigationGroup
var navGroup = Ti.UI.iPhone.createNavigationGroup({
	window:win
});
navWindow.add(navGroup);
// Top left button
var menuButton = Ti.UI.createButton({
	title:'Menu',
	toggle:false // Custom property for menu toggle
});
win.setLeftNavButton(menuButton);
menuButton.addEventListener('click', function(e){
	// If the menu is opened
	if(e.source.toggle == true){
		navWindow.animate({
			left:0,
			duration:300,
			curve:Ti.UI.ANIMATION_CURVE_EASE_IN_OUT
		});
		e.source.toggle = false;
	}
	// If the menu isn't opened
	else{
		navWindow.animate({
			left:150,
			duration:300,
			curve:Ti.UI.ANIMATION_CURVE_EASE_IN_OUT
		});
		e.source.toggle  = true;
	}
});

win.addEventListener('touchstart', function(e){
	// Get starting horizontal position
	e.source.axis = parseInt(e.x);
});
win.addEventListener('touchmove', function(e){
	// Subtracting current position to starting horizontal position
	var coordinates = parseInt(e.globalPoint.x) - e.source.axis;
	// Detecting movement after a 20px shift
	if(coordinates > 20 || coordinates < -20){
		e.source.moving = true;
	}
	// Locks the window so it doesn't move further than allowed
	if(e.source.moving == true && coordinates <= 150 && coordinates >= 0){
		// This will smooth the animation and make it less jumpy
		navWindow.animate({
			left:coordinates,
			duration:20
		});
		// Defining coordinates as the final left position
		navWindow.left = coordinates;
	}
});
win.addEventListener('touchend', function(e){
	// No longer moving the window
	e.source.moving = false;
	if(navWindow.left >= 75 && navWindow.left < 150){
		// Repositioning the window to the right
		navWindow.animate({
			left:150,
			duration:300
		});
		menuButton.toggle = true;	
	}else{
		// Repositioning the window to the left
		navWindow.animate({
			left:0,
			duration:300
		});
		menuButton.toggle = false;
	}
});