Silly example to show global scope without using Ti.App

app.js

Titanium.UI.setBackgroundColor('#ffffff');

var myglobalscope = {}; // global scope
Ti.include(  // ADD FILE HERE TO HAVE ACCESS TO GLOBAL SCOPE
    'ui.js',
    'something_else.js'
);

//Use our custom UI constructors to build the app's UI
myglobalscope.ui.createApplicationTabGroup();

// using global variable to open tab group
myglobalscope.ui.tabGroup.open();

something_else.js

//Wrap all code in a self-calling function to protect the global namespace
(function() {
    // Create sub-namespace
    myglobalscope.somethingelse = {};

    /**
     * useless test to show we are accessing a global variable again
     */
    myglobalscope.somethingelse.showGlobalVar = function() {
        alert("global var set in app.js " + myglobalscope.ui.tabGroup.tabs[0].title);
    }
})();

ui.js

//Wrap all code in a self-calling function to protect the global namespace
(function() {
    //Create sub-namespace
    myglobalscope.ui = {};

    //Create the main application tab group
    myglobalscope.ui.createApplicationTabGroup = function(_args) {
        var tabs = Ti.UI.createTabGroup();

        var windowOne = Ti.UI.createWindow({
            title:"Tab One",
        });
        //for now, just create some simple tabs named how we would want them
        tabs.addTab(Ti.UI.createTab({
            title:"Tab One",
            window:windowOne
        }));

        var oneButton = Titanium.UI.createButton({
            title:"Click Me",
            width: 100,
            height:35,
            top:50,
            left: 75
        });

        windowOne.add(oneButton);
        
        // calling a function from somewhere else... global again!!
        oneButton.addEventListener('click', function() {
            myglobalscope.somethingelse.showGlobalVar();
        });
        tabs.addTab(Ti.UI.createTab({
            title:"Tab Two",
            window:Ti.UI.createWindow({
                title:"Tab Two",
            })
        }));

        // setting global variable
        myglobalscope.ui.tabGroup = tabs;
    };
})();