public static async Task PushPopupPageAsync(this INavigationService navigationService, string name, NavigationParameters parameters = null, bool animated = true)
{
try
{
var page = CreatePopupPageByName(name);
// Ensure resolved page is not null. This could happen if the resolved page wasn't a Popup Page
if (page == null)
{
throw new PopupPageMissingException($"It seems something went wrong. We seem to have resolved a page for '{name}', but it doesn't seem to be a Popup Page.", new ArgumentNullException(nameof(page)));
}
// Make sure the VML is set to either True or False
if (ViewModelLocator.GetAutowireViewModel(page) == null)
{
ViewModelLocator.SetAutowireViewModel(page, true);
}
var currentPage = GetCurrentPage();
EnsureParametersContainsMode(parameters ?? (parameters = PopupUtilities.CreateNewNavigationParameters()), NavigationMode.New);
HandleINavigatingAware(page, parameters);
await s_popupNavigation.PushAsync(page, animated);
HandleINavigatedAware(currentPage, page, parameters);
}
catch (Exception ex)
{
s_logger.Log(ex.ToString(), Logging.Category.Exception, Logging.Priority.High);
throw;
}
}
private static void HandleINavigatedAware(Page page, NavigationParameters parameters, bool navigatedTo)
{
if (page == null)
{
return;
}
if (parameters == null)
{
parameters = navigatedTo ?
PopupUtilities.CreateNewNavigationParameters() :
PopupUtilities.CreateBackNavigationParameters();
}
PageUtilities.InvokeViewAndViewModelAction <INavigatedAware>(page, (view) => {
if (navigatedTo)
{
view.OnNavigatedTo(parameters);
}
else
{
view.OnNavigatedFrom(parameters);
}
});
PageUtilities.InvokeViewAndViewModelAction <IActiveAware>(page, (view) => view.IsActive = navigatedTo);
}