FoodCategoriesDetailsScreen.kt

@Composable
fun FoodCategoryDetailsScreen(state: FoodCategoryDetailsContract.State) {
    val scrollState = rememberLazyListState()
    val scrollOffset: Float = min(
        1f,
        1 - (scrollState.firstVisibleItemScrollOffset / 600f + scrollState.firstVisibleItemIndex)
    )
    Column {
        CategoryDetailsCollapsingToolbar(state.category, scrollOffset)
        Spacer(modifier = Modifier.height(2.dp))
        LazyColumn(state = scrollState) {
            items(state.categoryFoodItems) { item ->
                FoodItemRow(item = item)
            }
        }
    }
}

@Composable
private fun CategoryDetailsCollapsingToolbar(category: FoodItem?, scrollOffset: Float) {
    val imageSize by animateDpAsState(targetValue = max(72.dp, 128.dp * scrollOffset))
    val dynamicLines = max(3f, scrollOffset * 6).toInt()
    Row {
        Image(
            painterResource(id = ... ),
            modifier = Modifier.size(imageSize),
            contentDescription = "Food Category thumbnail"
        )
        Column {
            Text(text = category?.name ?: "")
            Text(
                text = category?.description?.trim() ?: "",
                maxLines = dynamicLines
            )
        }
    }
}