public ItemDetailViewModel(MenuItems newMenuItem)
{
menuDatabase = new MenuDatabase(); //the menu database is initialised
databaseModel = new DatabaseModel();
connection = databaseModel.GetConnection();
AddMenuItemCommand = new Command(async() => await AddToBasket());
MinusButtonPressedCommand = new Command(async() => await MinusButtonPressed());
PlusButtonPressedCommand = new Command(async() => await PlusButtonPressed());
// since the page will be used for opening current menu items, the current MenuItems object will be
//initialised with the newMenuItem paramater if one is passed through the program
if (newMenuItem == null)
{
menuItem = new MenuItems();
}
else
{
menuItem = newMenuItem;
}
}
public BasketPageViewModel()
{
// the messaging center is subscribed to the itemdetailviewmodel which will send items from there which the user has added to the basked
// and once the items have been added, the OnMenuItemAdded method will be executed
MessagingCenter.Subscribe <ItemDetailViewModel, MenuItems>(this, "MenuItemAdded", OnMenuItemAdded);
menuDatabase = new MenuDatabase();
databaseModel = new DatabaseModel();
connection = databaseModel.GetConnection();
LoadOrdersCommand = new Command(async() => await LoadOrders());
}
public NewItemViewModel()
{
databaseModel = new DatabaseModel(); //the database model is created
connection = databaseModel.GetConnection(); //the connection is retrieved
connection.CreateTableAsync <MenuItems>(); //a table of MenuItems is created in case one doesn't
// already exist
menuDatabase = new MenuDatabase(); //the database of menu items is initialized
menu = new MenuItems(); //the menu object is initialised
//
SaveCommand = new Command(async() => await OnSave());
CancelCommand = new Command(OnCancel);
//this.PropertyChanged +=
// (_, __) => SaveCommand.ChangeCanExecute();
//
}