commonMain.ModalBottomSheetSlot.kt Maven / Gradle / Ivy
@file:OptIn(ExperimentalMaterial3Api::class)
package de.halfbit.componental.compose
import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.material3.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.Density
import de.halfbit.componental.router.RouteNode
import de.halfbit.componental.router.slot.Slot
@Composable
public fun ModalBottomSheetSlot(
slot: Slot,
onSlotDismissed: () -> Unit,
content: @Composable (id: I, child: C) -> Unit,
) {
var current by remember { mutableStateOf?>(null) }
val density = LocalDensity.current
val active = slot.active
LaunchedEffect(active) {
if (active == null) {
current?.let {
it.sheetState.hide()
current = null
}
} else {
if (current?.component?.route != active.route) {
current?.sheetState?.hide()
current = null
}
val currentSlot = current
if (currentSlot == null) {
current = createBottomSheetSlotState(
active = active,
density = density,
onSlotDismissed = onSlotDismissed,
content = content,
)
// intentionally not calling .show() in initial, seems like a but in material3
} else {
currentSlot.sheetState.show()
}
}
}
current?.content?.invoke()
}
private fun createBottomSheetSlotState(
active: RouteNode,
density: Density,
onSlotDismissed: () -> Unit,
content: @Composable (id: I, child: C) -> Unit,
): BottomSheetSlotState {
val sheetState = SheetState(
skipPartiallyExpanded = true,
density = density,
initialValue = SheetValue.Hidden,
)
return BottomSheetSlotState(
component = active,
sheetState = sheetState,
content = {
val isDarkTheme = isSystemInDarkTheme()
val scrimAlpha = if (isDarkTheme) .62f else .86f
ModalBottomSheet(
sheetState = sheetState,
onDismissRequest = onSlotDismissed,
dragHandle = {}, // disable drag handle
scrimColor = MaterialTheme.colorScheme.scrim.copy(scrimAlpha),
content = { content(active.route, active.child) }
)
}
)
}
private class BottomSheetSlotState(
val component: RouteNode,
val sheetState: SheetState,
val content: @Composable () -> Unit,
)