/// <summary>
 /// Populates the page with content passed during navigation.  Any saved state is also
 /// provided when recreating a page from a prior session.
 /// </summary>
 /// <param name="sender">
 /// The source of the event; typically <see cref="NavigationHelper"/>
 /// </param>
 /// <param name="e">Event data that provides both the navigation parameter passed to
 /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
 /// a dictionary of state preserved by this page during an earlier
 /// session.  The state will be null the first time a page is visited.</param>
 private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
 {
     // TODO: Assign a collection of bindable groups to this.DefaultViewModel["Groups"]
     product = await ProductDataSource.GetDetailsAsync(e.NavigationParameter.ToString());
     this.defaultViewModel["ProductDetails"] = product;
     this.defaultViewModel["ProductName"] = product.Name;
 }
 /// <summary>
 /// Populates the page with content passed during navigation.  Any saved state is also
 /// provided when recreating a page from a prior session.
 /// </summary>
 /// <param name="sender">
 /// The source of the event; typically <see cref="NavigationHelper"/>
 /// </param>
 /// <param name="e">Event data that provides both the navigation parameter passed to
 /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
 /// a dictionary of state preserved by this page during an earlier
 /// session.  The state will be null the first time a page is visited.</param>
 private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
 {
     // Assign a collection of bindable items to this.DefaultViewModel["Items"]
     this.defaultViewModel["Items"] =
         await ProductDataSource.GetProductsBySubCategoryIdAsync(e.NavigationParameter.ToString());
     this.defaultViewModel["PageName"] = await CategoryDataSource.GetSubCategoryNameAsync_Dummy(e.NavigationParameter.ToString());           
 }
        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session.  The state will be null the first time a page is visited.</param>
        private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            // TODO: Assign a collection of bindable groups to this.DefaultViewModel["Groups"]
            // Fetch the groups of Job Cards and assign them as the items source for the gridview displaying all Jobs
            ObservableCollection<ProductCategory> allGroups = new ObservableCollection<ProductCategory>(await CategoryDataSource.GetListAsync_Dummy());
            groupedItemsViewSource.Source = allGroups;

        }
        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session.  The state will be null the first time a page is visited.</param>
        private async void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            // TODO: Assign a collection of bindable groups to this.DefaultViewModel["Groups"]
            // Fetch the groups of Job Cards and assign them as the items source for the gridview displaying all Jobs
            ObservableCollection<ProductCategory> allGroups = new ObservableCollection<ProductCategory>(await CategoryDataSource.GetListAsync());
            groupedItemsViewSource.Source = allGroups;
            
            // Assign the groups as the data source for Zoomed Out view
            (SemanticZoom.ZoomedOutView as ListViewBase).ItemsSource = groupedItemsViewSource.View.CollectionGroups;

            // Check the window size and update the Visual State
            UpdateVisualState(Window.Current.Bounds.Width);
        }