bottomnav.kt

@Composable
private fun BottomNavigationBar(
    modifier: Modifier = Modifier,
    currentDestination: Screen,
    onClick: (id: Screen) -> Unit
) {

    val bottomBarVisible = bottomBarNavDestinations.contains(currentDestination)

    AnimatedVisibility(
        visible = bottomBarVisible,
        enter = fadeIn(animationSpec = tween(1000)) + slideInVertically(
            initialOffsetY = { it },
            animationSpec = tween(1000)
        ),
        exit = fadeOut(animationSpec = tween(1000)) + slideOutVertically(
            targetOffsetY = { it },
            animationSpec = tween(1000)
        )
    ) {
        BottomNavigation(modifier = modifier) {
            bottomBarNavDestinations.forEach { destination ->
                BottomNavigationItem(
                    icon = {
                        when (destination) {
                            Screen.Calendar -> Icon(
                                imageVector = Icons.Default.CalendarToday,
                                contentDescription = null
                            )
                            Screen.Targets -> Icon(
                                imageVector = Icons.Default.PieChart,
                                contentDescription = null
                            )
                            Screen.FoodList -> Icon(
                                imageVector = Icons.Default.Fastfood,
                                contentDescription = null
                            )
                            else -> Unit
                        }
                    },
                    label = { Text(text = destination.name) },
                    selected = currentDestination == destination,
                    onClick = { onClick(destination) }
                )
            }
        }
    }
}