private void RegisterServices()
{
var navigationService = new NavigationService();
navigationService.RegisterViewModels(GetType().Assembly);
BaseNavigationViewModel.RegisterService(navigationService);
}
/// <inheritdoc />
public async Task PushModalAsync(BaseNavigationViewModel viewModel)
{
viewModel.IsModal = true;
var view = InstantiateView(viewModel);
var nv = new NavigationPage((Page)view);
await FormsNavigation.PushModalAsync(nv);
}
/// <inheritdoc />
public async Task PushAsync(BaseNavigationViewModel viewModel, bool discardCurrent = false)
{
var currentPage = FormsNavigation.NavigationStack.LastOrDefault();
var view = InstantiateView(viewModel);
await FormsNavigation.PushAsync((Page)view);
if (discardCurrent && currentPage != null)
{
FormsNavigation.RemovePage(currentPage);
}
}
public Task PushModalAsync(BaseNavigationViewModel viewModel)
{
viewModel.Display = ViewModelDisplay.Modal;
var view = InstantiateView(viewModel);
// Most likely we're going to want to put this into a navigation page so we can have a title bar on it
var nv = new NavigationPage((Page)view);
return(FormsNavigation.PushModalAsync(nv));
}
public void ReplaceRoot(BaseNavigationViewModel viewModel, bool withNavigationEnabled = true)
{
if (InstantiateView(viewModel) is Page view)
{
if (withNavigationEnabled)
{
Application.Current.MainPage = new NavigationPage(view);
}
else
{
Application.Current.MainPage = view;
}
}
}
/// <inheritdoc />
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)Activator.CreateInstance(viewType);
view.ViewModel = viewModel;
return(view);
}
public async Task ReplaceAsync(BaseNavigationViewModel viewModel, bool allowSamePageSet = false)
{
// Ensure that we're not pushing a new page if the DetailPage is already set to this type
if (!allowSamePageSet)
{
IViewFor page;
if (DetailPage is NavigationPage)
{
page = ((NavigationPage)DetailPage).RootPage as IViewFor;
}
else
{
page = DetailPage as IViewFor;
}
if (page?.ViewModel.GetType() == viewModel.GetType())
{
var masterController = Application.Current.MainPage as MasterDetailPage;
masterController.IsPresented = false;
return;
}
}
Page newDetailPage = await Task.Run(() =>
{
var view = InstantiateView(viewModel);
// Tab pages shouldn't go into navigation pages
if (view is TabbedPage)
{
newDetailPage = (Page)view;
}
else
{
newDetailPage = new NavigationPage((Page)view);
}
return(newDetailPage);
});
DetailPage = newDetailPage;
}
/// <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;
}
public Task PushAsync(BaseNavigationViewModel viewModel)
{
var view = InstantiateView(viewModel);
return(FormsNavigation.PushAsync((Page)view));
}
void SetDetailViewModel(BaseNavigationViewModel vm) => Navigation.ReplaceAsync(vm);
Task OnCategorySelected(BaseNavigationViewModel user)
{
return(Navigation.PushAsync(user));
}
/// <inheritdoc />
public async Task PushAsync(BaseNavigationViewModel viewModel)
{
var view = InstantiateView(viewModel);
await FormsNavigation.PushAsync((Page)view);
}
