public GuideList()
{
this.InitializeComponent();
viewModel = DataContext as INavigableViewModel;
viewModel.SetNavigationHelper(new NavigationHelper(this));
}
public async Task Extended_interface_contract_changes_can_be_detected()
{
var ct = CancellationToken.None;
IStackNavigator navigator = new BlindStackNavigator();
// If the extension methods available in the abstraction package change their signatures, we get compilation errors here.
TestVM vmAfterNavigate = await navigator.Navigate(ct, () => new TestVM(), suppressTransition : false);
TestVM vmAfterNavigateAndClear = await navigator.NavigateAndClear(ct, () => new TestVM(), suppressTransition : false);
INavigableViewModel vm = navigator.GetActiveViewModel();
bool canGoBack = navigator.CanNavigateBack();
// Navigate twice so that RemovePrevious works.
await navigator.Navigate(ct, () => new TestVM(), suppressTransition : false);
await navigator.Navigate(ct, () => new TestVM(), suppressTransition : false);
await navigator.RemovePrevious(ct);
bool didNavigateBack = await navigator.TryNavigateBackTo <TestVM>(ct);
await navigator.ProcessRequest(ct, StackNavigatorRequest.GetNavigateRequest(() => new TestVM(), false, false));
IObservable <EventPattern <StackNavigatorEventArgs> > ob1 = navigator.ObserveStateChanged();
IObservable <StackNavigatorState> ob2 = navigator.ObserveCurrentState();
}
private void _closeBooking(IEntity closedEntity)
{
try
{
Logger.Log("=Fermeture de réservation (onglet)=");
int entityIndex = -1;
int i = 0;
foreach (IEntity entity in _currentEntities)
{
if (entity.Equals(closedEntity))
{
entityIndex = i;
break;
}
i++;
}
if (entityIndex != -1 && closedEntity is INavigableViewModel)
{
INavigableViewModel bookingVM = closedEntity as INavigableViewModel;
bookingVM.NextCalled -= _nextCalled;
bookingVM.PreviousCalled -= _prevCalled;
bookingVM.MessageReceived -= _messageReceived;
_currentEntities.RemoveAt(entityIndex);
}
}
catch (Exception ex)
{
Logger.Log(ex);
}
}
public HomeViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
Items = new[]
{
new SelectableViewModel(true, "3", "Bill Gates", "A chef"),
new SelectableViewModel(false, "12", "Steve White", "An expert on logistic")
};
}
private void _node_shutdown(INavigableViewModel navigableVM)
{
if (navigableVM != null)
{
navigableVM.NextCalled -= _nextCalled;
navigableVM.PreviousCalled -= _prevCalled;
navigableVM.Shutdown -= _nodeShutdown;
}
}
public LoginPage()
{
this.InitializeComponent();
viewModel = DataContext as INavigableViewModel;
viewModel.SetNavigationHelper(new NavigationHelper(this));
this.SpinningAnimation.Begin();
}
private void _prev(INavigableViewModel navigableVM)
{
try
{
LinkedListNode <INavigableViewModel> currentNode = _navigation.Find(navigableVM);
if (currentNode.Previous != null)
{
currentNode = currentNode.Previous;
_currentEntities[_currentEntitiesView.CurrentPosition] = currentNode.Value;
}
}
catch (Exception ex)
{
Logger.Log(ex);
}
}
private void _next(INavigableViewModel navigableVM)
{
try
{
LinkedListNode <INavigableViewModel> currentNode = _navigation.Find(navigableVM);
if (currentNode.Next != null)
{
currentNode = currentNode.Next;
_currentEntities[_currentEntitiesView.CurrentPosition] = currentNode.Value;
currentNode.Value.NextCalled += _nextCalled;
currentNode.Value.PreviousCalled += _prevCalled;
currentNode.Value.Shutdown += _nodeShutdown;
}
}
catch (Exception ex)
{
Logger.Log(ex);
}
}
public async Task Interface_contract_changes_can_be_detected()
{
var ct = CancellationToken.None;
IStackNavigator navigator = new BlindStackNavigator();
// If the core contract changes, we get compilation errors here.
INavigableViewModel vmAfterNavigate = await navigator.Navigate(ct, StackNavigatorRequest.GetNavigateRequest(() => new TestVM(), false, false));
INavigableViewModel vmAfterBack = await navigator.NavigateBack(ct);
await navigator.Clear(ct);
// Navigate twice so that RemoveEntries works.
await navigator.Navigate(ct, StackNavigatorRequest.GetNavigateRequest(() => new TestVM(), false, false));
await navigator.Navigate(ct, StackNavigatorRequest.GetNavigateRequest(() => new TestVM(), false, false));
await navigator.RemoveEntries(ct, new int[] { 0 }.AsEnumerable());
}
public TimeViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
timer = TimerFactory.StartAndExecute(TimeSpan.FromSeconds(1), () => CurrentTime = DateTime.Now);
}
protected override async Task <object> InnerNavigateAndGetView(INavigableViewModel viewModel)
{
var request = State.LastRequest;
var viewType = request.ViewType;
if (viewType == null)
{
if (_registrations.TryGetValue(request.ViewModelType, out var registeredViewType))
{
viewType = registeredViewType;
}
else
{
throw new KeyNotFoundException($"Can't process navigation because no view is registered with '{request.ViewModelType.FullName}'. Provide a view type in the NavigationRequest or provide a registration in the constructor.");
}
}
var view = await Dispatcher.RunTaskAsync(CoreDispatcherPriority.High, UINavigate);
if (view != null && !(request.SuppressTransitions ?? false))
{
// There's no way to know when the animation ends. So, we assume it runs for 250ms.
await Task.Delay(millisecondsDelay : 250);
}
// The returned view is stored in the Stack.
return(view);
async Task <Page> UINavigate()
{
try
{
var overrideInfo = request.SuppressTransitions ?? false
? (NavigationTransitionInfo) new SuppressNavigationTransitionInfo()
: (NavigationTransitionInfo) new SlideNavigationTransitionInfo()
{
Effect = SlideNavigationTransitionEffect.FromRight
};
var navigationResult = await WaitForNavigationResult(() =>
{
var isNavigationSuccessful = _frame.Navigate(viewType, parameter: null, overrideInfo);
if (!isNavigationSuccessful)
{
if (_logger.IsEnabled(LogLevel.Error))
{
_logger.LogError($"Failed frame navigation to view '{viewType.FullName}'.");
}
}
});
if (request.ClearBackStack ?? false)
{
_frame.BackStack?.Clear();
}
if (navigationResult.Content is Page page)
{
var viewTcs = new TaskCompletionSource <Page>();
page.Loaded += OnPageLoaded;
void OnPageLoaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
page.Loaded -= OnPageLoaded;
viewTcs.SetResult(page);
}
page.NavigationCacheMode = NavigationCacheMode.Required; // TODO: Investigate why we need this.
viewModel.SetView(page);
page.DataContext = viewModel;
if (page.IsLoaded || _frame.Visibility == Visibility.Collapsed)
{
// If the page is loaded, we return it directly.
// If the page is not loaded, but the _frame is collapsed, the page will not load, so we don't wait for it to load.
page.Loaded -= OnPageLoaded;
return(page);
}
else
{
#if __IOS__
// The event sequence doesn't seem to work properly on iOS.
// The Loaded event doesn't seem to be raised so we don't wait and simply return the page.
page.Loaded -= OnPageLoaded;
return(page);
#else
// If the _frame is visible and the page is not loaded, we wait for the page to load.
return(await viewTcs.Task);
#endif
}
}
else
{
if (_logger.IsEnabled(LogLevel.Error))
{
_logger.LogError($"Failed frame navigation to view '{viewType.FullName}' because the this type is not a Page.");
}
throw new InvalidOperationException($"Failed frame navigation to view '{viewType.FullName}' because the this type is not a Page.");
}
}
catch (NavigationCanceledException e)
{
if (_logger.IsEnabled(LogLevel.Error))
{
_logger.LogError($"Failed frame navigation to view '{viewType.FullName}' because it was canceled.", e);
}
throw;
}
catch (Exception e)
{
if (_logger.IsEnabled(LogLevel.Error))
{
_logger.LogError($"Failed frame navigation to view '{viewType.FullName}'.", e);
}
throw;
}
}
}
private void _nodeShutdown(object sender, INavigableViewModel navigableVM)
{
_node_shutdown(navigableVM);
}
private void _prevCalled(object sender, INavigableViewModel navigableVM)
{
_prev(navigableVM);
}
private void _node_shutdown(INavigableViewModel navigableVM)
{
if (navigableVM != null)
{
navigableVM.NextCalled -= _nextCalled;
navigableVM.PreviousCalled -= _prevCalled;
navigableVM.Shutdown -= _nodeShutdown;
}
}
public TimeViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
timer = TimerFactory.StartAndExecute(TimeSpan.FromSeconds(1), () => CurrentTime = DateTime.Now);
}
private void _next(INavigableViewModel navigableVM)
{
try
{
LinkedListNode<INavigableViewModel> currentNode = _navigation.Find(navigableVM);
if (currentNode.Next != null)
{
currentNode = currentNode.Next;
_currentEntities[_currentEntitiesView.CurrentPosition] = currentNode.Value;
currentNode.Value.NextCalled += _nextCalled;
currentNode.Value.PreviousCalled += _prevCalled;
currentNode.Value.Shutdown += _nodeShutdown;
}
}
catch (Exception ex)
{
Logger.Log(ex);
}
}
private void _prev(INavigableViewModel navigableVM)
{
try
{
LinkedListNode<INavigableViewModel> currentNode = _navigation.Find(navigableVM);
if (currentNode.Previous != null)
{
currentNode = currentNode.Previous;
_currentEntities[_currentEntitiesView.CurrentPosition] = currentNode.Value;
}
}
catch (Exception ex)
{
Logger.Log(ex);
}
}
private void _nextCalled(object sender, INavigableViewModel navigableVM)
{
_next(navigableVM);
}
private void _nodeShutdown(object sender, INavigableViewModel navigableVM)
{
_node_shutdown(navigableVM);
}
/// <summary>
/// Creates a new instance of <see cref="NavigationStackEntry"/>.
/// </summary>
/// <param name="request">The navigation request.</param>
/// <param name="viewModel">The ViewModel.</param>
/// <param name="view">The view.</param>
public NavigationStackEntry(StackNavigatorRequest request, INavigableViewModel viewModel, object view)
{
Request = request;
ViewModel = viewModel;
View = view;
}
protected NavigableViewModel(INavigableViewModel navigableViewModel)
{
this.navigableViewModel = navigableViewModel;
}
public WelcomeViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
}
public SettingsViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
}
public WelcomeViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
}
protected override Task <object> InnerNavigateAndGetView(INavigableViewModel viewModel)
{
// Don't do anything.
return(Task.FromResult <object>(null));
}
private void _nextCalled(object sender, INavigableViewModel navigableVM)
{
_next(navigableVM);
}
public LoginViewModel(INavigableViewModel navigableViewModel)
: base(navigableViewModel)
{
}
private void _prevCalled(object sender, INavigableViewModel navigableVM)
{
_prev(navigableVM);
}