nav stack

gistfile1.js

//navGroup Wrapper to be able to implement home. 
//Track stack of open windows
var _navGroup, //Original 
    currentStack = [],
    uuid = require('lib/util/uuid');


var create = function(args) {
    if (Ti.Platform.osname != 'android') {
        _navGroup = Ti.UI.iPhone.createNavigationGroup(args);
    } else {
        _navGroup = require('lib/navGroupStub');
        _navGroup.firstWindow = args.window;
    }
};
exports.create = create;

var flush = function() {
    currentStack = [];
};

//Return the iOS NavGroup Instance
var get = function() {
    return _navGroup;
};
exports.get = get;

//Return to top level quick quick.
var home = function() {
    currentStack.forEach(function(item) {
        _navGroup.close(item, {animated: false});
    });
    flush();
};
exports.home = home;


//Used to close all windows except stackId.
//You would want to use this AFTER calling navGroup open, so you have the stackId
//note: When Closing windows this way, close handler doesnt fire EXCEPT on the 
//visible window.
var closeExcept = function(win) {
    currentStack.forEach(function(item) {
        if(item._stackId != win._stackId) {
            _navGroup.close(item, {animated: false});
        } else {
            win.backButtonTitle = 'Home';
        }
    });
    currentStack = [win];
};
exports.closeExcept = closeExcept;


//Remove self from stack, and remove closeHandler
var closeHandler = function(e) {
    Ti.API.debug('NavGroup Window Close Handler');
    e.source.removeEventListener('close', closeHandler);
    currentStack.some(function(item, index) {
        if(item._stackId == e.source._stackId) {
            currentStack.splice(index, 1);
            return true;
        }
    });
};


//Open a window
//@return string _stackId: UUID of window on the stack. 
var open = function(win, args) {
    //patch for droid to keep same pattern of navgroup.open()
    win = win || _navGroup.firstWindow;
    
    Ti.API.debug('navGroupOpen');
    args = args || {};

    //Fix backButtonText
    //We only set it to Home when we call closeExcept()
    win.backButtonTitle = 'Back';

    win._stackId = win._stackId || uuid();

    _navGroup.open(win,args);

    win.addEventListener('close', closeHandler);

    currentStack.push(win);

    return win._stackId;
};
exports.open = open;

var close = function(args) {    
    Ti.API.debug('navGroup Close');
    _navGroup.close(args);
};
exports.close = close;