Backbone / jQM sketch

backbone_jqm_sketch.js

var productCollection = {};
var eventMediator = {};
var viewUtils = new utils();

window.products = new Products();
window.product;

window.CartView = Backbone.View.extend({
    template : _.template(viewUtils.getTemplate('Cart')),
    render : function(eventName) {
        $(this.el).html(this.template());
        return this;
    },
});

window.CheckoutView = Backbone.View.extend({
    template : _.template(viewUtils.getTemplate('Checkout')),
    initialize : function(event) {
        console.log('CheckoutView::initialize');
    },
    render : function(eventName) {
        $(this.el).html(this.template());
        return this;
    },
});

window.HomeView = Backbone.View.extend({
    template : _.template(viewUtils.getTemplate('Home')),   
    render : function(eventName) {
        $(this.el).html(this.template());
        return this;
    },
});

window.ProductsView = Backbone.View.extend({
    template : _.template(viewUtils.getTemplate('Products')),
    events : {
        //"all":"productSelected"
        "click a" : "productSelected",
        //"click a#foo" : "productSelected",
        //"dblclick":"test",
        //"tap":"test"
    },
    initialize : function(event) {
        console.log('ProductsView::initialize');
        this.collection = products;
        this.collection.fetch({
            url:'/bc_jquery_mobile/store_app_02/products.json', 
            success:this.populateProductsList
        });
    },
    render : function(eventName) {
        $(this.el).html(this.template());
        return this;
    },
    productSelected : function(event) {
        console.log('productSelected');
        console.log($(event.target).attr('data-url'));
        window.product = $(event.target);
        console.dir(this.collection.get('p2'));
    },
    populateProductsList:function(data1, data2) {
        console.log('populateProductsList');
        $('#productListView').empty();
        
        $.each(data2.products, function(i, item) {
            $('#productListView').append('<li><a href="#productdetail" data-url="' + item.id + '"><h3>' + item.label + '</h3></a><a href="#" data-rel="dialog">Buy</a></li>');
        });

        $('#productListView').listview('refresh');        
    }
});

window.ProductdetailView = Backbone.View.extend({
    template : _.template(viewUtils.getTemplate('ProductDetail')),
    events : {
        "click #addToCartButton" : "addToCart",
        "click #checkoutButton" : "checkout",
    },
    initialize : function(event) {
        console.log('ProductdetailView::initialize');
        this.collection = products;
        console.dir(window.product.attr('data-url'));
        var ur = window.product.attr('data-url');
        console.dir(this.collection.get(ur));
    },
    render : function(eventName) {
        $(this.el).html(this.template());
        return this;
    },
    addToCart : function(event) {
        console.log('addToCart');

    },
    checkout : function(event) {
        console.log('checkout');
        app.checkout();
    }
});

var AppRouter = Backbone.Router.extend({

    routes : {
        "" : "home",
        "products" : "products",
        "cart" : "cart",
        "productdetail" : "productdetail",
        "checkout" : "checkout",
        //"checkout/:do_purchase" : "doPurchase"
    },

    initialize : function() {
        // Handle back button throughout the application
        $('.back').live('click', function(event) {
            window.history.back();
            return false;
        });
        this.firstPage = true;
    },
    
    cart : function() {
        console.log('AppRouter::cart');
        this.changePage(new CartView());
    },

    checkout : function() {
        console.log('AppRouter::checkout');
        this.changePage(new CheckoutView());
    },

    home : function() {
        console.log('AppRouter::home');
        this.changePage(new HomeView());
    },

    products : function() {
        console.log('AppRouter::products');
        this.changePage(new ProductsView());
    },

    productdetail : function() {
        console.log('AppRouter::productdetail');
        this.changePage(new ProductdetailView());
    },

    changePage : function(page) {
        // Add the data-role attribute to the page element
        $(page.el).attr('data-role', 'page');

        page.render();

        $('body').append($(page.el));

        var transition = $.mobile.defaultPageTransition;
        // No transition on the first page
        if(this.firstPage) {
            transition = 'none';
            this.firstPage = false;
        }
        $.mobile.changePage($(page.el), {
            changeHash : false,
            transition : transition
        });
    }
});

$(document).ready(function() {
    console.log('...Application Ready...');

    // Views, Routing
    app = new AppRouter();
    
    // Handle global events
    eventMediator = _(eventMediator).extend(Backbone.Events);
    eventMediator.bind("checkout", function() { 
        app.checkout(); 
    });        

    Backbone.history.start();

});

How / when destroy() be called? Not sure I understand.

Also, do collections require me to manually add models, or does this happen automagically?

Hi Mike,

How / when destroy() be called? Not sure I understand.

It needs to be called during the changePage method. I modified the method to hold a reference to the fromPage (the one that was on the way out) and attach a listener for the pagehide event. You can then call the .page('destroy') method on the outgoing page in this event handler.

do collections require me to manually add models, or does this happen automagically?

You can either add models to a collection using the add method, or supply an initial collection of models in the Collection's constructor. Alternatively, backbone will take care of adding / modifying models when Backbone.sync is invoked on a collection (usually as the result of a fetch operation).