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Vertical scroll layout composable util
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.LazyListScope
import androidx.compose.foundation.lazy.items
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
data class ChildLayout(
val contentType: String = "",
val content: @Composable (item: Any?) -> Unit = {},
val items: List<Any> = emptyList()
)
@Composable
fun VerticalScrollLayout(
modifier: Modifier = Modifier,
vararg childLayouts: ChildLayout
) {
LazyColumn(modifier = modifier.fillMaxSize()) {
childLayouts.forEach { child ->
if (child.items.isEmpty()) {
loadItem(child)
} else {
loadItems(child)
}
}
}
}
/**
* Use single item compose if no scroll or only horizontal scroll needed
*/
private fun LazyListScope.loadItem(childLayout: ChildLayout) {
item(contentType = childLayout.contentType) {
childLayout.content(null)
}
}
/**
* Use load multiple items to the lazy column when nested vertical scroll is needed
*/
private fun LazyListScope.loadItems(childLayout: ChildLayout) {
items(items = childLayout.items) { item ->
childLayout.content(item)
}
}
/**
* Compose items only if general item is successfully casted to defined class
*/
@Suppress("UNCHECKED_CAST")
@Composable
fun <T: Any> LoadItemAfterSafeCast(
generalItem: Any?,
composeWithSafeItem: @Composable (item: T) -> Unit
) {
(generalItem as? T)?.let { safeItem ->
composeWithSafeItem(safeItem)
}
}
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