public CatalogVM()
{
ShoppingCart = ShoppingCart.Instance;
FoodCatalog = new Catalog();
DrinkCatalog = new Catalog();
FoodCatalog.AddFood(new Food("/Assets/StoreLogo.png", "Burger", 2.0));
FoodCatalog.AddFood(new Food("/Assets/StoreLogo.png", "Hotdog", 2.0));
FoodCatalog.AddFood(new Food("/Assets/StoreLogo.png", "Sandwich", 2.0));
FoodCatalog.AddFood(new Food("/Assets/StoreLogo.png", "Pasta", 2.0));
DrinkCatalog.AddDrink(new Drink("1000ml", "Vand", 3.0));
DrinkCatalog.AddDrink(new Drink("333ml", "Cola", 3.0));
DrinkCatalog.AddDrink(new Drink("500ml", "Øl", 3.0));
DrinkCatalog.AddDrink(new Drink("322ml", "Juice", 3.0));
_addFoodToCart = new RelayCommand(AddFood, CanAlwaysExecute);
_addDrinksToCart = new RelayCommand(AddDrinks, CanAlwaysExecute);
_increaseAmount = new RelayCommand(IncreaseAmount, ItemIsSelected);
_decreaseAmount = new RelayCommand(DecreaseAmount, ItemIsSelected);
}