public MainPageViewModel(INavigationService navigationService, UserLibraryViewModel userLibaryViewModel, CatalogsViewModel catalogsViewModel, DataBaseInitializer dbInitialzier, CopsPageViewModel copsPageViewModel)
{
_navigationService = navigationService;
_dbInitialzier = dbInitialzier;
UserLibraryViewModel = userLibaryViewModel;
CatalogsViewModel = catalogsViewModel;
CopsPageViewModel = copsPageViewModel;
}
public void OnBackPressed(CancelEventArgs cancelEventArgs)
{
if (CopsPageViewModel == null)
{
return;
}
if (!CopsPageViewModel.CanGoToPreviousLevel)
{
return;
}
cancelEventArgs.Cancel = true;
CopsPageViewModel.GoBack();
}
