ALT @Parcelize data object MainKey : FragmentKey() { override fun instantiateFragment(): Fragment = MainFragment() override fun bindServices(serviceBinder: ServiceBinder) { with(serviceBinder) { val mainViewModel = MainViewModel() add(mainViewModel) rebind<FormViewModel.ResultHandler>(mainViewModel) } } operator fun invoke() = this }

ALT @Parcelize data object FormKey : FragmentKey() { override fun instantiateFragment(): Fragment = FormFragment() override fun bindServices(serviceBinder: ServiceBinder) { with(serviceBinder) { add( FormViewModel( resultHandler = lookup(), backstack = backstack, ) ) } } operator fun invoke() = this }

ALT class MainFragment : KeyedFragment(R.layout.step8_main_fragment) { private val viewModel by lazy { lookup<MainViewModel>() } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) val binding = Step8MainFragmentBinding.bind(view) binding.textResult.setText(viewModel.state) binding.buttonBeginFlow.onClick { backstack.goTo(FormKey()) } } }

ALT class FormFragment : KeyedFragment(R.layout.step8_form_fragment) { private val viewModel by lazy { lookup<FormViewModel>() } override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState) val binding = Step8FormFragmentBinding.bind(view) binding.inputSomeData.setText(viewModel.someData) binding.inputMoreData.setText(viewModel.moreData) binding.inputSomeData.onTextChanged { viewModel.someData = it } binding.inputMoreData.onTextChanged { viewModel.moreData = it } binding.buttonPassResults.onClick { viewModel.onButtonClicked() } } }