zsoltk

import androidx.compose.ui.graphics.Color

// reds
val md_red_50 = Color(0xFFFFEBEE)
val md_red_100 = Color(0xFFFFCDD2)
val md_red_200 = Color(0xFFEF9A9A)
val md_red_300 = Color(0xFFE57373)
val md_red_400 = Color(0xFFEF5350)
val md_red_500 = Color(0xFFF44336)
val md_red_600 = Color(0xFFE53935)

zsoltk

/**
 * Based on https://medium.com/swlh/android-mvi-with-jetpack-compose-b0890f5156ac
 * Adapted for 0.1.0-dev04
 */
@Composable
fun <T> observe(data: LiveData<T>): T? {
    var result by state { data.value }
    val observer = remember { Observer<T> { result = it } }

    onCommit(data) {

zsoltk

// Scaled down to 0% (not visible)
private val queued = Props(
    scale = 0f,
)

// Scaled down to 85%
private val bottom = Props(
    scale = 0.85f,
)

zsoltk

internal class PromoteAll<T : Any> : CardsOperation<T> {

    override fun invoke(elements: CardsElements<T>): CardsElements<T> =
        elements.map {
            it.transitionTo(
                // This uses State.next() we defined earlier:
                newTargetState = it.targetState.next(),
                operation = this
            )
        }

zsoltk

class CardsTransitionHandler<T>(
    private val transitionSpec: TransitionSpec<Cards.State, Float> = { 
        spring(stiffness = Spring.StiffnessVeryLow) 
    }
) : ModifierTransitionHandler<T, Cards.State>() {
 
    private fun Cards.State.toProps() =
        when (this) {
            is Queued -> queued
            is Bottom -> bottom

zsoltk

data class Props(
    val offsetX: Dp = 0.dp,
    val scale: Float = 1f,
    val rotationZ: Float = 0f,
    val zIndex: Float = 0f,
)

zsoltk

val cards = Cards(
    initialItems = listOf(
        Routing.ProfileCard(0, "Lara"),    // Will be top
        Routing.ProfileCard(1, "Kate"),    // Will be bottom
        Routing.ProfileCard(2, "Brad"),    // Queued = 0
        Routing.ProfileCard(3, "Megan"),   // ...etc.
        Routing.ProfileCard(4, "Michael"),
        Routing.ProfileCard(0, "Lara"),
        Routing.ProfileCard(1, "Kate"),
        Routing.ProfileCard(2, "Brad"),

zsoltk

lifecycle.coroutineScope.launchWhenStarted {
    delay(1000)
    repeat(3) {
        delay(2000)
        cards.indicateLike()
        delay(1000)
        cards.indicatePass()
        delay(1000)
        cards.votePass()
        delay(1000)

zsoltk

private fun Cards.State.toProps() =
    when (this) {
        is Queued -> queued
        is Bottom -> bottom
        is Top -> top
        is VoteLike -> voteLike
        is VotePass -> votePass
    }

zsoltk

class VoteLike<T : Any> internal constructor() : CardsOperation<T> {

    // Returns a modified list of elements with new target states applied
    override fun invoke(elements: CardsElements<T>): CardsElements<T> =
        elements.map { element ->
            if (element.targetState == Cards.State.Top) {
                element.transitionTo(
                    newTargetState = Cards.State.VoteLike,
                    operation = this
                )