Swipe views with tabs in Compose Multiplatform

App.kt

import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.pager.HorizontalPager
import androidx.compose.foundation.pager.rememberPagerState
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Scaffold
import androidx.compose.material.ScrollableTabRow
import androidx.compose.material.Tab
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.runtime.Composable
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import kotlinx.coroutines.launch
import ui.theme.AppTheme

enum class Tabs(val text: String) {
    Explore("Explore"),
    Missions("Missions"),
    HumansInSpace("Humans in Space"),
    EarthAndClimate("Earth & Climate"),
    TheSolarSystem("The Solar System"),
    TheUniverse("The Universe"),
    Science("Science"),
    Aeronautics("Aeronautics"),
    Technology("Technology")
}

@OptIn(ExperimentalFoundationApi::class)
@Composable
fun App() {
    val scope = rememberCoroutineScope()
    val pagerState = rememberPagerState(pageCount = { Tabs.entries.size })
    val selectedTabIndex = remember { derivedStateOf { pagerState.currentPage } }

    AppTheme {
        Scaffold(
            topBar = {
                TopAppBar(
                    title = {
                        Text("NASA \uD83D\uDCAB")
                    },
                    backgroundColor = MaterialTheme.colors.background,
                    elevation = 0.dp
                )
            }
        ) {
            Column(
                modifier = Modifier
                    .fillMaxSize()
                    .padding(top = it.calculateTopPadding())
            ) {
                ScrollableTabRow(
                    backgroundColor = Color.Transparent,
                    selectedTabIndex = selectedTabIndex.value,
                    modifier = Modifier.fillMaxWidth()
                ) {
                    Tabs.entries.forEachIndexed { index, currentTab ->
                        Tab(
                            selected = selectedTabIndex.value == index,
                            onClick = {
                                scope.launch {
                                    pagerState.animateScrollToPage(currentTab.ordinal)
                                }
                            },
                            text = { Text(text = currentTab.text) }
                        )
                    }
                }
                HorizontalPager(
                    state = pagerState,
                    modifier = Modifier
                        .fillMaxWidth()
                        .weight(1f)
                ) {
                    Box(
                        modifier = Modifier.fillMaxSize(),
                        contentAlignment = Alignment.Center
                    ) {
                        /**
                         * @TODO render page based on selectedTabIndex
                         */
                        Text(text = Tabs.entries[selectedTabIndex.value].text)
                    }
                }
            }
        }
    }
}