fluxtah

class MyViewModel : BaseViewModel() {
    val _data = MutableLiveData<String>()
    val data: LiveData<String>
        get() = _data

    fun load() {
        _data.value = "Hello, World"
    }
}

fluxtah

class MyViewModel : BaseViewModel() {
    val data: LiveData<String> = MutableLiveData()

    fun load() {
        data.forceValue("Hello, World")
    }

    private fun <T> LiveData<T>.forceValue(value: T) {
        (this as MutableLiveData<T>).value = value
    }

fluxtah

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            onActive {
                // TODO something special

                onDispose {
                    // TODO clean up the special stuff

fluxtah

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            val hello = remember { HelloModel(HelloResult.Pending) }

            observe(getHello()) {
                onResult {
                    if(hello.state != result) hello.state = result

fluxtah

@Composable
fun <T> observe(@Pivotal data: LiveData<T>, block: ObserveScope<T>.() -> Unit) {
    onActive {
        val context = ObserveScope<T>()
        block(context)
        context.onStartBlock()

        val observer = object : Observer<T> {
            override fun onChanged(t: T) {
                val resultScope = ObserveScope.OnResultScope(this, data, t)

fluxtah

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            val hello = remember { HelloModel(HelloResult.Pending) }

            Recompose { recompose ->
                observe(getHello()) {
                    onResult {

fluxtah

interface HelloView {
    fun updateGreetingText(greetingText: String)
    fun onShowNewGreetingButtonPressed(onPressed: () -> Unit)
}

fluxtah

interface HelloModel {
    fun loadGreeting()
}

fluxtah

class HelloPresenter(val model: HelloModel, val view: HelloView) {

    fun onCreated(init: Boolean) {
        // If this is the first time we loaded,
        // then load the first greeting
        if (init) {
            model.loadGreeting()
        }
    }

fluxtah

class HelloViewImpl(activity: AppCompatActivity) : HelloView {
    private val greetingTextView: TextView = activity.findViewById(R.id.greeting_text)
    private val newGreetingButton: Button = activity.findViewById(R.id.new_greeting_button)

    override fun updateGreetingText(greetingText: String) {
        greetingTextView.text = greetingText
    }

    override fun onShowNewGreetingButtonPressed(onPressed: () -> Unit) =
        newGreetingButton.setOnClickListener { onPressed() }