public void NavigateBack <TResult>(ILifecycleViewModelWithResult <TResult> fromViewModel, ResultCode resultCode, TResult result)
where TResult : Result
{
NavigationViewProvider.TryGetView(fromViewModel, out INavigationView <ILifecycleViewModelWithResult <TResult> > fromView);
NavigateBack(fromView, resultCode, result, true);
}
public void NavigateBack <TResult>(ILifecycleViewModelWithResult <TResult> fromViewModel, ResultCode resultCode, TResult result)
where TResult : Result
{
var fromView = NavigationViewProvider.Get(fromViewModel);
NavigateBack(fromView, resultCode, result, true);
}
/// <summary>
/// Gets an existing <see cref="INavigationView{TViewModel}"/> instance by <paramref name="viewModel"/> that can return a lifecycle-aware view model result.
/// </summary>
/// <typeparam name="TResult">The type of the view model result.</typeparam>
/// <param name="viewModel">The view model that is used to get its view.</param>
/// <param name="view">The navigation view corresponding to the provided model.</param>
/// <returns><see langword="true"/> if the view still exists and has not yet been garbage collected or disposed; otherwise, <see langword="false"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="viewModel"/> is <see langword="null"/>.</exception>
public static bool TryGetView <TResult>(ILifecycleViewModelWithResult <TResult> viewModel, [MaybeNullWhen(returnValue: false)] out INavigationView <ILifecycleViewModelWithResult <TResult> > view)
where TResult : Result
{
if (viewModel == null)
{
throw new ArgumentNullException(nameof(viewModel));
}
return(ViewRegistry.TryGetView(viewModel, out view));
}
/// <summary>
/// Returns an existing <see cref="INavigationView{TViewModel}"/> instance by <paramref name="viewModel"/> that can return a lifecycle-aware view model result.
/// </summary>
/// <typeparam name="TResult">The type of the view model result.</typeparam>
/// <param name="viewModel">The view model that is used to get its view.</param>
/// <returns>The navigation view instance.</returns>
/// <exception cref="ArgumentNullException"><paramref name="viewModel"/> is <see langword="null"/>.</exception>
/// <exception cref="InvalidOperationException">The view instance is missing for the provided <paramref name="viewModel"/>.</exception>
public static INavigationView <ILifecycleViewModelWithResult <TResult> > Get <TResult>(ILifecycleViewModelWithResult <TResult> viewModel)
where TResult : Result
{
if (viewModel == null)
{
throw new ArgumentNullException(nameof(viewModel));
}
return(ViewCache.Get <INavigationView <ILifecycleViewModelWithResult <TResult> >, ILifecycleViewModelWithResult <TResult> >(viewModel));
}
/// <summary>
/// Returns an existing <see cref="INavigationView{TViewModel}"/> instance by <paramref name="viewModel"/> that can return a lifecycle-aware view model result.
/// </summary>
/// <typeparam name="TResult">The type of the view model result.</typeparam>
/// <param name="viewModel">The view model that is used to get its view.</param>
/// <returns>The navigation view instance.</returns>
/// <exception cref="ArgumentNullException"><paramref name="viewModel"/> is <see langword="null"/>.</exception>
/// <exception cref="InvalidOperationException">The view instance is missing for the provided <paramref name="viewModel"/>.</exception>
public static INavigationView <ILifecycleViewModelWithResult <TResult> > Get <TResult>(ILifecycleViewModelWithResult <TResult> viewModel)
where TResult : Result
{
if (viewModel == null)
{
throw new ArgumentNullException(nameof(viewModel));
}
if (!ViewRegistry.TryGetView <ILifecycleViewModelWithResult <TResult>, INavigationView <ILifecycleViewModelWithResult <TResult> > >(viewModel, out var view))
{
throw new InvalidOperationException(
$"The view instance is missing for the provided '{TypeFormatter.FormatName(viewModel.GetType())}' view model.");
}
return(view);
}
