private IGameScreen GetScreenForViewModel(Type viewModelType)
{
var viewType = _navigationLookup.GetViewType(viewModelType);
if (viewType == null)
{
throw new NavigationException($"No view is registered for {viewModelType.Name}");
}
var view = _serviceLocator.Resolve(viewType);
if (view == null)
{
throw new NavigationException($"No View of type {viewType.Name} has been registered with the Ioc container");
}
if (!(view is IGameScreen screen))
{
throw new NavigationException($"View type {viewType.Name} is not an IScene");
}
return(screen);
}
private TPage GetPageForViewModel <TPage>(Type viewModelType) where TPage : Page
{
var viewType = _navigationLookup.GetViewType(viewModelType);
if (viewType == null)
{
throw new NavigationException($"No view is registered for {viewModelType.Name}");
}
var view = _serviceLocator.Resolve(viewType);
if (view == null)
{
throw new NavigationException($"No View of type {viewType.Name} has been registered with the Ioc container");
}
if (!(view is TPage page))
{
throw new NavigationException($"View type {viewType.Name} is not a {typeof(TPage).Name}");
}
return(page);
}
protected BaseTabbedPage(
TViewModel viewModel,
INavigationService navigationService,
INavigationLookup navigationLookup,
IServiceLocator serviceLocator,
IAnalyticsService analyticsService)
{
ViewModel = viewModel;
BindingContext = ViewModel;
On <Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
if (viewModel is ITabbedViewModel _)
{
SetBinding(TabDefinitionsProperty, new Binding(nameof(ITabbedViewModel.TabDefinitions), BindingMode.OneWay,
new ActionConverter <IReadOnlyList <TabDefinition> >(async tabs =>
{
if (tabs == null)
{
return;
}
foreach (var tabDefinition in tabs)
{
if (TabExists(tabDefinition))
{
analyticsService.Debug("Tab already exists");
return;
}
var viewType = navigationLookup.GetViewType(tabDefinition.ViewModelType);
if (viewType == null)
{
throw new NavigationException($"No view is registered for {tabDefinition.ViewModelType.Name}");
}
var view = serviceLocator.Resolve(viewType);
if (view == null)
{
throw new NavigationException($"No View of type {viewType.Name} has been registered with the Ioc container");
}
if (!(view is Page page))
{
throw new NavigationException($"View type {viewType.Name} is not a {nameof(Page)}");
}
switch (page.BindingContext)
{
case IAsyncInitializable initializable:
await initializable.InitializeAsync();
break;
case IInitializingViewModel initializableViewModel:
initializableViewModel.InitializeCommand.Execute();
break;
}
if (tabDefinition.NavigationStackName != null)
{
analyticsService.Debug($"Added new navigating tab for {tabDefinition.ViewModelType.Name}");
Children.Add(new NavigationView(navigationService, page, tabDefinition.NavigationStackName)
{
Title = tabDefinition.Title
});
}
else
{
analyticsService.Debug($"Added new tab for {tabDefinition.ViewModelType.Name}");
page.Title = tabDefinition.Title;
Children.Add(page);
}
}
})));
}
}