public ShoppingListPage()
{
InitializeComponent();
// Stops the ListView from going into the Status Bar:
On <Xamarin.Forms.PlatformConfiguration.iOS>().SetUseSafeArea(true);
var assembly = typeof(ShoppingListPage);
viewModel = new ShoppingListVM();
BindingContext = viewModel;
// Messaging Centre Subscriptions:
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.POPUP_PAGE_FINISHED, async(sender) =>
{
var items = await viewModel.refresh(Preferences.Get(Constants.SORT_BY, Constants.SORT_BY_DEFAULT));
//itemListView.ItemsSource = items;
});
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.SORT_BY_DEFAULT_SELECTED, async(sender) =>
{
Preferences.Set(Constants.SORT_BY, Constants.SORT_BY_DEFAULT);
var items = await viewModel.refresh(Preferences.Get(Constants.SORT_BY, Constants.SORT_BY_DEFAULT));
//itemListView.ItemsSource = items;
});
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.SORT_BY_NAME_SELECTED, async(sender) =>
{
Preferences.Set(Constants.SORT_BY, Constants.SORT_BY_NAME);
var items = await viewModel.refresh(Preferences.Get(Constants.SORT_BY, Constants.SORT_BY_DEFAULT));
//itemListView.ItemsSource = items;
});
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.REFRESH_SHOPPING_LIST, async(sender) =>
{
var items = await viewModel.refresh(Preferences.Get(Constants.SORT_BY, Constants.SORT_BY_DEFAULT));
//itemListView.ItemsSource = items;
});
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.SELECT_MODE_TOGGLED, (sender) =>
{
// TO-DO:
//ItemSelectTick
});
MessagingCenter.Subscribe <ItemDetailVM, Item>(this, Constants.ITEM_DELETED, (sender, deletedItem) => {
Navigation.PushPopupAsync(new ShoppingListPageUndoPopup(deletedItem));
});
// No items in cart, displaying empty view:
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.DISPLAY_EMPTY_VIEW, (sender) =>
{
emptyViewRefreshView.IsVisible = true;
itemListView.IsVisible = false;
noInternetRefreshView.IsVisible = false;
emptyViewRefreshView.IsRefreshing = false;
itemListView.IsRefreshing = false;
});
// Display Network Error:
MessagingCenter.Subscribe <App>((App)Application.Current, Constants.DISPLAY_NETWORK_ERROR, (sender) =>
{
emptyViewRefreshView.IsVisible = false;
itemListView.IsVisible = false;
noInternetRefreshView.IsVisible = true;
CrossToastPopUp.Current.ShowToastError(Strings.UNABLE_TO_CONNECT);
noInternetRefreshView.IsRefreshing = false;
itemListView.IsRefreshing = false;
});
MessagingCenter.Subscribe <App, SelectableObservableCollection <Item> >((App)Application.Current, Constants.LISTVIEW_REFRESH_COMPLETE, (sender, Items) =>
{
itemListView.IsVisible = true;
noInternetRefreshView.IsVisible = false;
noInternetRefreshView.IsRefreshing = false;
emptyViewRefreshView.IsVisible = false;
itemListView.IsRefreshing = false;
itemListView.ItemsSource = Items;
});
}
protected override async void OnAppearing()
{
base.OnAppearing();
await viewModel.refresh(Preferences.Get(Constants.SORT_BY, Constants.SORT_BY_DEFAULT));
}