private void TryGoBack()
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
}
}
public PageViewModelBase(INavigationService navigationService,
IAlertMessageService alertMessageService,
IResourceLoader resourceLoader,
IAppSettingsService appSettingsService)
{
_navigationService = navigationService;
_alertMessageService = alertMessageService;
_resourceLoader = resourceLoader;
_appSettingsService = appSettingsService;
_viewModelMapper = new BusinessObjectDataViewModelMapper(resourceLoader);
NavigateHomeCommand = new DelegateCommand(NavigateToMain);
ToggleFlyoutCommand = new DelegateCommand(ToggleFlyout);
FlyoutVisibility = Visibility.Collapsed;
InitActionFunctions();
#if WINDOWS_APP
if (NavigationService.CanGoBack())
{
// default back command
BackCommand = new DelegateCommand(() => NavigationService.GoBack());
}
#endif
}
private void NavigationService_NavigatedToPage(object sender, NavigatedEventArgs e)
{
var navigatedNode = Navigation.FindPage(e.Page);
if (navigatedNode != null)
{
Navigation.Active = navigatedNode;
}
else
{
Navigation.Active = null;
}
if (NavPanelOpened)
{
NavPanelOpened = false;
}
if (NavigationService.CanGoBack())
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
else
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
}
OnPropertyChanged("GoBackCommand");
}
public ShellViewModel()
{
Navigation = new AppNavigation();
Navigation.LoadNavigation();
if (Window.Current.Bounds.Width < 800)
{
this.SplitViewDisplayMode = SplitViewDisplayMode.Overlay;
}
else
{
this.SplitViewDisplayMode = SplitViewDisplayMode.CompactOverlay;
}
HamburguerButtonVisibility = Visibility.Visible;
SetHamburguerButtonVisibility += ((sender, hamburguerButtonVisibility) => { HamburguerButtonVisibility = hamburguerButtonVisibility; });
Window.Current.SizeChanged += WindowSizeChanged;
NavigationService.NavigatedToPage += NavigationService_NavigatedToPage;
FullScreenService.FullScreenModeChanged += FullScreenModeChanged;
SystemNavigationManager.GetForCurrentView().BackRequested += ((sender, e) =>
{
if (NavigationService.CanGoBack())
{
e.Handled = true;
NavigationService.GoBack();
}
});
}
public ShellViewModel()
{
Navigation = new AppNavigation();
Navigation.LoadNavigation();
if (Window.Current.Bounds.Width < 800)
{
this.SplitViewDisplayMode = SplitViewDisplayMode.Overlay;
}
else
{
this.SplitViewDisplayMode = SplitViewDisplayMode.CompactOverlay;
}
Window.Current.SizeChanged += ((args, e) => { WindowSizeChanged(e.Size.Width); });
NavigationService.NavigatedToPage += NavigationService_NavigatedToPage;
FullScreenService.FullScreenModeChanged += FullScreenModeChanged;
SystemNavigationManager.GetForCurrentView().BackRequested += ((sender, e) =>
{
if (NavigationService.CanGoBack())
{
FullScreenService.ExitFullScreenMode();
e.Handled = true;
NavigationService.GoBack();
}
});
}
/// <summary>
/// Invoked when the hardware back button is pressed. For Windows Phone only.
/// </summary>
/// <param name="sender">Instance that triggered the event.</param>
/// <param name="e">Event data describing the conditions that led to the event.</param>
private void HardwareButtons_BackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)
{
if (NavigationService.CanGoBack())
{
e.Handled = true;
NavigationService.GoBack();
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void OnNavigated(object sender, NavigationEventArgs e)
{
if (DeviceGestureService.UseTitleBarBackButton)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility =
NavigationService.CanGoBack() ? AppViewBackButtonVisibility.Visible : AppViewBackButtonVisibility.Collapsed;
}
}
private async void NavManager_BackRequested(object sender, BackRequestedEventArgs e)
{
if (NavigationService.CanGoBack())
{
e.Handled = true;
await NavigationService.GoBackAsync();
}
}
private void DoSearch()
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
}
else
{
NavigationService.NavigateToPlanner(string.Empty);
}
}
protected virtual void OnGoBackRequested(object sender, DeviceGestureEventArgs e)
{
if (!e.Handled)
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
}
}
protected virtual void OnHardwareButtonsBackPressed(object sender, BackPressedEventArgs e)
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
else
{
this.Exit();
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnGoBackRequested(object sender, DeviceGestureEventArgs e)
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
else if (DeviceGestureService.IsHardwareBackButtonPresent && e.IsHardwareButton)
{
Exit();
}
}
/// <summary>
/// Handle hardware back button by navigating back if possible using the NavigationService
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HardwareButtonsOnBackPressed(object sender, BackPressedEventArgs e)
{
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
else
{
Exit();
}
}
private async Task AddStation(Station station)
{
await StationService.AddStationAsync(station);
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
}
else
{
NavigationService.NavigateToMainPage();
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
ThemeService.FirstRun();
SetContentView(Resource.Layout.activity_main);
this.WireUpControls();
this.SetToolbarWithDrawer(Toolbar, Drawer, 0, 0);
Ioc.Resolve <PermissionsService>().SetActivity(this);
Ioc.Resolve <FileService>().SetActivity(this);
NavigationService = Ioc.Resolve <NavigationService>()
.SetFragmentManager(SupportFragmentManager)
.SetFragmentContainerId(Resource.Id.FragmentContainerView);
GestureService = Ioc.Resolve <GestureService>();
this.WhenActivated((CompositeDisposable disposable) =>
{
Observable.FromEventPattern <GestureEventArgs>(
h => GestureService.GoBackRequested += h,
h => GestureService.GoBackRequested -= h)
.Subscribe(x =>
{
if (!x.EventArgs.Handled && NavigationService.CanGoBack())
{
NavigationService.GoBack();
x.EventArgs.Handled = true;
}
})
.DisposeWith(disposable);
Ioc.Resolve <IShellEvents>()
.WhenTitleSet()
.Throttle(TimeSpan.FromMilliseconds(150))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(title => Toolbar.Title = title)
.DisposeWith(disposable);
Disposable
.Create(() =>
{
})
.DisposeWith(disposable);
});
NavigationService.NavigateTo(PageKeys.HomePage);
}
private async Task DeleteStation()
{
string name = CurrentStation.Name;
await StationService.DeleteStationAsync(name);
if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
}
else
{
NavigationService.NavigateToMainPage();
}
}
public void SetupBackButton()
{
SettingsService settings = SettingsService.Instance;
if (settings.UseHeaderBackButton)
{
ShellView.IsBackButtonVisible = NavigationViewBackButtonVisible.Collapsed;
_navManager.AppViewBackButtonVisibility = NavigationService.CanGoBack() ? AppViewBackButtonVisibility.Visible : AppViewBackButtonVisibility.Collapsed;
}
else
{
_navManager.AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
ShellView.IsBackButtonVisible = NavigationViewBackButtonVisible.Auto;
ShellView.IsBackEnabled = NavigationService.CanGoBack();
}
}
/// <summary>
/// Permet de revenir en arriére
/// Cette fonction n'est utile que pour la version WINDOWS_APP puisque la version WINDOWS_PHONE_APP utilise le backbutton avec l'implémentation livré dans Navegar
/// ou bien une surcharge de cette implémentation (voir l'exemple dans le fichier App.xaml.cs)
/// </summary>
private void Cancel()
{
if (NavigationService.CanGoBack())
{
//Lorsque l'on revient d'une commande on rafraichi la liste des commandes sur la page de liste
if (NavigationService.GetTypeViewModelToBack() == typeof(ListCommandesPageViewModel))
{
//Permet de relancer la fonction LoadDatas aprés la navigation arriére vers la liste des commandes
NavigationService.GoBack("LoadDatas", new object[] {});
}
else
{
NavigationService.GoBack();
}
}
}
public ShellViewModel()
{
Navigation = new AppNavigation();
Navigation.LoadNavigation();
HamburguerButtonVisibility = Visibility.Visible;
SetHamburguerButtonVisibility += ((sender, hamburguerButtonVisibility) => { HamburguerButtonVisibility = hamburguerButtonVisibility; });
NavigationService.NavigatedToPage += NavigationService_NavigatedToPage;
SystemNavigationManager.GetForCurrentView().BackRequested += ((sender, e) =>
{
if (NavigationService.CanGoBack())
{
e.Handled = true;
NavigationService.GoBack();
}
});
}
/// <summary>
/// Ovveride with logic as to what happens when <see cref="IGestureService.GoBackRequested"/> is fired,
/// by default it will try to close all drawers if they are closed then it will
/// call <see cref="INavigationService.GoBack()"/> if its possible.
/// </summary>
protected virtual void OnGoBackRequested(object sender, GestureEventArgs e)
{
if (e.Handled)
{
return;
}
if (Drawer != null && (Drawer.IsDrawerOpen(GravityCompat.Start) || Drawer.IsDrawerOpen(GravityCompat.End)))
{
Drawer.CloseDrawers();
e.Handled = true;
}
else if (NavigationService != null && NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
else
{
e.Handled = false;
}
}
public ShellPage()
{
InitializeComponent();
this.DataContext = this;
ShellPage.Current = this;
this.SizeChanged += OnSizeChanged;
if (SystemNavigationManager.GetForCurrentView() != null)
{
SystemNavigationManager.GetForCurrentView().BackRequested += ((sender, e) =>
{
if (SupportFullScreen && ShellControl.IsFullScreen)
{
e.Handled = true;
ShellControl.ExitFullScreen();
}
else if (NavigationService.CanGoBack())
{
NavigationService.GoBack();
e.Handled = true;
}
});
NavigationService.Navigated += ((sender, e) =>
{
if (NavigationService.CanGoBack())
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
else
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
}
});
}
}
public Shell(Frame rootFrame)
{
InitializeComponent();
Presenter.Content = rootFrame;
NavigationService = Ioc.Resolve <NavigationService>();
this.WhenActivated(disposable =>
{
Ioc.Resolve <IShellEvents>()
.WhenTitleSet()
.Throttle(TimeSpan.FromMilliseconds(150))
.ObserveOn(RxApp.MainThreadScheduler)
.Subscribe(title => NavigationView.Header = title)
.DisposeWith(disposable);
Observable.FromEventPattern <NavigationEventArgs>(
h => NavigationService.Navigated += h,
h => NavigationService.Navigated -= h)
.Subscribe(e =>
{
NavigationView.IsBackEnabled = NavigationService.CanGoBack();
})
.DisposeWith(disposable);
Observable.FromEventPattern <TypedEventHandler <MUXC.NavigationView, MUXC.NavigationViewBackRequestedEventArgs>,
MUXC.NavigationViewBackRequestedEventArgs>(
h => NavigationView.BackRequested += h,
h => NavigationView.BackRequested -= h)
.Subscribe(e =>
{
NavigationService.GoBack();
})
.DisposeWith(disposable);
});
}
public ShellPage()
{
InitializeComponent();
_navManager = SystemNavigationManager.GetForCurrentView();
_settingsNavigationStr = "SettingPage?PivotItem=0";
string title = Windows.ApplicationModel.Package.Current.DisplayName;
// determine and set if the app is started in debug mode
Title = System.Diagnostics.Debugger.IsAttached ? "[Debug] " + title : title;
// Hide default title bar.
CoreApplicationViewTitleBar coreTitleBar = CoreApplication.GetCurrentView().TitleBar;
coreTitleBar.IsVisibleChanged += CoreTitleBar_IsVisibleChanged;
SetTitleBarAsDraggable();
// Register a handler for when the size of the overlaid caption control changes.
// For example, when the app moves to a screen with a different DPI.
coreTitleBar.LayoutMetricsChanged += CoreTitleBar_LayoutMetricsChanged;
if (WindowDisplayInfo.GetForCurrentView() == WindowDisplayMode.FullScreenTabletMode)
{
AppTitleBar.Visibility = Visibility.Collapsed;
}
ShellViewInternal = ShellView;
ShellView.Content = _frame = new Frame();
NavigationService = NavigationFactory.Create(_frame).AttachGestures(Window.Current, Gesture.Back, Gesture.Forward, Gesture.Refresh);
SetupGestures();
SetupBackButton();
NavigationService.CanGoBackChanged += (s, args) =>
{
//Backbutton setting
if (SettingsService.Instance.UseHeaderBackButton)
{
_navManager.AppViewBackButtonVisibility = NavigationService.CanGoBack() ? AppViewBackButtonVisibility.Visible : AppViewBackButtonVisibility.Collapsed;
}
else
{
if (ShellView.IsBackEnabled != NavigationService.CanGoBack())
{
ShellView.IsBackEnabled = NavigationService.CanGoBack();
if (ShellView.IsBackButtonVisible == NavigationViewBackButtonVisible.Collapsed)
{
ShellView.IsBackButtonVisible = NavigationViewBackButtonVisible.Auto;
}
}
}
};
_frame.Navigated += (s, e) =>
{
if (TryFindItem(e.SourcePageType, e.Parameter, out object item))
{
SetSelectedItem(item, false);
// TODO test if nessasary
if (item == null)
{
return;
}
}
};
ShellView.ItemInvoked += (sender, args) =>
{
SelectedItem = args.IsSettingsInvoked ? ShellView.SettingsItem : Find(args.InvokedItemContainer as NavigationViewItem);
};
if (System.Diagnostics.Debugger.IsAttached)
{
Windows.UI.ViewManagement.ApplicationView.GetForCurrentView().IsScreenCaptureEnabled = true;
}
else
{
//prevent screenshot capture for the app
Windows.UI.ViewManagement.ApplicationView.GetForCurrentView().IsScreenCaptureEnabled = false;
}
Loaded += ShellPage_Loaded;
}
/// <summary>
/// Permet de vérifier que l'on peut revenir en arriére
/// </summary>
/// <returns></returns>
private bool CanCancel()
{
return(NavigationService.CanGoBack());
}
