/// <inheritdoc />
public async Task PushAsync(BaseNavigationViewModel viewModel, bool discardCurrent = false)
{
var currentPage = FormsNavigation.NavigationStack.LastOrDefault();
var view = InstantiateView(viewModel);
if (currentPage.BindingContext is INavigationAware navPrevious)
{
navPrevious.OnNavigatingFrom();
}
if (viewModel is INavigationAware navForward)
{
navForward.OnNavigatingTo();
}
await FormsNavigation.PushAsync((Page)view);
if (viewModel is INavigationAware navigated)
{
navigated.OnNavigatedTo();
}
if (discardCurrent)
{
FormsNavigation.RemovePage(currentPage);
}
}
/// <inheritdoc />
public async Task PopToRootAsync(BaseNavigationViewModel vm, bool animate)
{
var navPage = InstantiateView(vm) as Page;
var root = FormsNavigation.NavigationStack.First();
FormsNavigation.InsertPageBefore(navPage, root);
await FormsNavigation.PopToRootAsync(animate);
}
IViewFor InstantiateView(BaseNavigationViewModel viewModel)
{
// Figure out what type the view model is
var viewModelType = viewModel.GetType();
// look up what type of view it corresponds to
var viewType = _viewModelViewDictionary[viewModelType];
// instantiate it
var view = (IViewFor)App.Container.Resolve(viewType);
view.ViewModel = viewModel;
return(view);
}
/// <inheritdoc />
public void SwitchDetailPage(BaseNavigationViewModel viewModel)
{
var view = InstantiateView(viewModel);
Page newDetailPage;
// Tab pages shouldn't go into navigation pages
if (view is TabbedPage)
{
newDetailPage = (Page)view;
}
else
{
newDetailPage = new NavigationPage((Page)view);
}
DetailPage = newDetailPage;
}
/// <inheritdoc />
public async Task PushModalAsync(BaseNavigationViewModel viewModel)
{
viewModel.IsModal = true;
var currentPage = FormsNavigation.NavigationStack.LastOrDefault();
if (currentPage.BindingContext is INavigationAware navPrevious)
{
navPrevious.OnNavigatingFrom();
}
if (viewModel is INavigationAware navForward)
{
navForward.OnNavigatingTo();
}
var view = InstantiateView(viewModel);
var nv = new NavigationPage((Page)view);
await FormsNavigation.PushModalAsync(nv);
}