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

        setContent {
            onActive {
                // TODO something special

                onDispose {
                    // TODO clean up the special stuff

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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
    }

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

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

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

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

class MyActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {

fluxtah

@Composable
private fun GuitarString(modifier: Modifier, thickness: Dp = 3.dp) {
    Container(modifier = modifier, alignment = Alignment.CenterRight) {
        ColoredRect(
            modifier = modifier + Border(
                RoundedCornerShape(1.dp),
                1.dp,
                Color.Black
            ) + LayoutHeight(thickness), brush = SolidColor(Color.LightGray)
        )

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@Composable
private fun Fretwire(modifier: Modifier, scale: Float = 1.5f) {
    Container(modifier = modifier, alignment = Alignment.CenterRight) {
        ColoredRect(
            modifier = Border(
                RoundedCornerShape(1.dp),
                1.dp,
                Color.Black
            ) + LayoutSize(width = (BASE_FRETWIRE_WIDTH * scale).dp, height = (BASE_FRETBOARD_HEIGHT * scale).dp),
            brush = SolidColor(Color.Gray)

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@Composable
private fun FretMarkerLayer(
    fromFret: Int,
    toFret: Int,
    markers: List<Marker>,
    scale: Float = 1.5f
) {
    val fretRange = toFret - fromFret

    Table(columns = fretRange) {

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@Composable
fun Fretboard() {
    Column {
        Container {
            Stack {
                Row(modifier = LayoutWidth.Fill) {
                    // Fretwire + Nut layer
                }
                Column(modifier = LayoutWidth.Fill) {
                    // String layer

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@Composable
fun PianoRollOctave(
    startFromF: Boolean = false,
    showNoteNames: Boolean = false,
    octave: Int? = 0,
    highlightedKeys: List<PianoKey>? = null
) {
    Stack {
        WhiteNotes(startFromF, octave, highlightedKeys)
        BlackNotes(startFromF, octave, highlightedKeys)

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@Composable
fun PianoChord(chord: List<PianoKey>) {
    val lower = chord.lowerKey()
    val upper = chord.upperKey()
    PianoRoll(lower, upper, true, chord)
}