public ProductListingViewModel()
{
CategoryId = "1";
CategoryName = "CategoryName";
PivotItems = new List <SubCategoryDisplayItem>();
if (DesignMode.DesignModeEnabled)
{
//Generate Fake Design Time Data.
foreach (var subCategory in DesignTimeDataService.GenerateAudioSubCategories())
{
var sc = new SubCategoryDisplayItem("1", "Audio", subCategory);
var prds = new List <Product>();
prds.AddRange(DesignTimeDataService.GenerateFavoriteProducts(9, "Fabrikam"));
prds.AddRange(DesignTimeDataService.GenerateFavoriteProducts(4, "Contoso"));
prds.AddRange(DesignTimeDataService.GenerateFavoriteProducts(7, "Proseware"));
sc.AllProducts = new List <Product>(prds);
sc.FilteredProducts = new List <Product>(prds);
sc.CurrentFilters.Add(new ProductListFilterItem("$222 - $333", "Price Range", false));
sc.CurrentFilters.Add(new ProductListFilterItem("32", "Megabytes", false));
sc.CurrentFilters.Add(new ProductListFilterItem("5x", "Optical Zoom", false));
if (PivotItems.Count == 0)
{
SelectedPivot = sc;
}
PivotItems.Add(sc);
}
FavoriteItems = DesignTimeDataService.GenerateFavoriteProducts(4);
HasInitialized = true;
}
}
public override async Task InitializeViewModel(string param)
{
if (HasInitialized)
{
return;
}
ProductCategory category = await DataManager.CategoryDataSource.GetById(param);
List <ProductSubCategory> subCategories = null;
ProductSubCategory selectedSubCategory = null;
if (category == null)
{
//Not a Category - must be a subcategory
category = await DataManager.CategoryDataSource.GetParentCategory(param);
if (category != null)
{
subCategories = category.SubCategoryItems;
selectedSubCategory = subCategories.FirstOrDefault(item => item.Id == param);
}
else
{
//error - id is not a category or subcategory
throw new Exception("The Parameter is not a Category or a SubCategory");
}
}
else
{
//Populate the SubCategories + get the first SubCategory;
subCategories = category.SubCategoryItems;
selectedSubCategory = subCategories.FirstOrDefault();
}
CategoryId = category.Id;
//Populate the SubCategory Display Items..
ObservableCollection <SubCategoryDisplayItem> subCategoryDisplayItems = new ObservableCollection <SubCategoryDisplayItem>();
SubCategoryDisplayItem selectedSubCategoryDisplayItem = null;
foreach (var subCategory in subCategories)
{
var sc = new SubCategoryDisplayItem(category.Id, category.Name, subCategory);
var prds = (await DataManager.ProductDataSource.GetProductsBySubCategoryIdAsync(subCategory.Id)).ToList();
sc.AllProducts = new List <Product>(prds);
sc.FilteredProducts = new List <Product>(prds);
subCategoryDisplayItems.Add(sc);
if (selectedSubCategory.Id == sc.Id)
{
selectedSubCategoryDisplayItem = sc;
}
}
CategoryName = category.Name;
CategoryId = category.Id;
SelectedPivot = selectedSubCategoryDisplayItem;
PivotItems = subCategoryDisplayItems.ToList();
}
public static async void ShowProductFilterFlyout(SubCategoryDisplayItem subcategoryDisplayItem, ProductListFilterViewModel fvm)
{
try
{
//Check if we are on Windows Mobile
bool isWindowsPhone = DeviceFamilyHelper.CurrentDeviceFamily() == DeviceFamily.Mobile;
//If Windows Phone then use the Dialog Control otherwise use the SettingsFlyout control.
if (isWindowsPhone)
{
ProductListFilterFlyout flyout = new ProductListFilterFlyout()
{
DataContext = fvm, HorizontalAlignment = HorizontalAlignment.Stretch, VerticalContentAlignment = VerticalAlignment.Stretch, VerticalAlignment = VerticalAlignment.Stretch
};
flyout.Margin = new Thickness(0, 20, 0, 0);
ContentDialog dialog = new ContentDialog()
{
Title = "Select Product Filters",
Content = flyout,
PrimaryButtonText = "Close",
FullSizeDesired = true,
Background = (SolidColorBrush)Application.Current.Resources["FlyoutBackgroundThemeBrush"],
Foreground = new SolidColorBrush(Colors.White),
RequestedTheme = ElementTheme.Dark,
VerticalAlignment = VerticalAlignment.Stretch,
VerticalContentAlignment = VerticalAlignment.Stretch
};
await dialog.ShowAsync();
}
else
{
SettingsFlyout fly = new SettingsFlyout();
ProductListFilterFlyout flyout = new ProductListFilterFlyout()
{
DataContext = fvm
}; //(subcategoryDisplayItem);
fly.Content = flyout;
fly.RequestedTheme = ElementTheme.Dark;
fly.Background = (SolidColorBrush)Application.Current.Resources["FlyoutBackgroundThemeBrush"];
fly.HeaderBackground = (SolidColorBrush)Application.Current.Resources["FlyoutBackgroundThemeBrush"];
fly.Title = "Filter Products";
fly.ShowIndependent();
}
}
catch (Exception ex)
{
string error = ex.Message;
}
}
//Initialize the ViewModel Filter Groups via referenced SubCategoryDisplayItem
public void InitializeFilterGroupsFromProductList(SubCategoryDisplayItem subCategoryDisplayItem)
{
_subCategoryDisplayItem = subCategoryDisplayItem;
// Build our list of Filter Groups
_filterGroups.Clear();
if (_subCategoryDisplayItem?.AllProducts != null)
{
if (_subCategoryDisplayItem.AllProducts.Any())
{
foreach (var groupItem in BuildFilterGroups(this, _subCategoryDisplayItem.AllProducts.ToList()))
{
// Add EventHandler so we can react to filter changes (and notify parent page)
groupItem.FilterUpdated += GroupItem_FilterUpdated;
_filterGroups.Add(groupItem);
}
}
}
}
