ModalWideNavigationRail

@Composable
fun ModalWideNavigationRailSample() {
    var selectedItem by rememberSaveable { mutableIntStateOf(0) }
    val items = listOf("Home", "Search", "Settings")
    val selectedIcons = listOf(Icons.Filled.Home, Icons.Filled.Favorite, Icons.Filled.Star)
    val unselectedIcons =
        listOf(Icons.Outlined.Home, Icons.Outlined.FavoriteBorder, Icons.Outlined.StarBorder)
    val state = rememberWideNavigationRailState()
    val scope = rememberCoroutineScope()
    val headerDescription =
        if (state.targetValue == WideNavigationRailValue.Expanded) {
            "Collapse rail"
        } else {
            "Expand rail"
        }

    Row(Modifier.fillMaxWidth()) {
        ModalWideNavigationRail(
            state = state,
            // Note: the value of expandedHeaderTopPadding depends on the layout of your screen in
            // order to achieve the best alignment.
            expandedHeaderTopPadding = 64.dp,
            header = {
                // Header icon button should have a tooltip.
                @OptIn(ExperimentalMaterial3Api::class)
                TooltipBox(
                    positionProvider =
                        TooltipDefaults.rememberTooltipPositionProvider(
                            TooltipAnchorPosition.Above
                        ),
                    tooltip = {
                        PlainTooltip(
                            Modifier.semantics {
                                // TODO(b/496338253): Remove this modifier once bug where tooltip
                                //  text is not announced by a11y screen readers is resolved.
                                liveRegion = LiveRegionMode.Assertive
                                paneTitle = headerDescription
                            }
                        ) {
                            Text(headerDescription)
                        }
                    },
                    state = rememberTooltipState(),
                ) {
                    IconButton(
                        modifier =
                            Modifier.padding(start = 24.dp).semantics {
                                // The button must announce the expanded or collapsed state of the
                                // rail for accessibility.
                                stateDescription =
                                    if (state.currentValue == WideNavigationRailValue.Expanded) {
                                        "Expanded"
                                    } else {
                                        "Collapsed"
                                    }
                            },
                        onClick = {
                            scope.launch {
                                if (state.targetValue == WideNavigationRailValue.Expanded)
                                    state.collapse()
                                else state.expand()
                            }
                        },
                    ) {
                        if (state.targetValue == WideNavigationRailValue.Expanded) {
                            Icon(Icons.AutoMirrored.Filled.MenuOpen, headerDescription)
                        } else {
                            Icon(Icons.Filled.Menu, headerDescription)
                        }
                    }
                }
            },
        ) {
            items.forEachIndexed { index, item ->
                WideNavigationRailItem(
                    railExpanded = state.targetValue == WideNavigationRailValue.Expanded,
                    icon = {
                        Icon(
                            if (selectedItem == index) selectedIcons[index]
                            else unselectedIcons[index],
                            contentDescription = item,
                        )
                    },
                    label = { Text(item) },
                    selected = selectedItem == index,
                    onClick = { selectedItem = index },
                )
            }
        }

        val textString =
            if (state.currentValue == WideNavigationRailValue.Expanded) {
                "Expanded"
            } else {
                "Collapsed"
            }
        Column {
            Text(modifier = Modifier.padding(16.dp), text = "The rail is $textString.")
            Text(
                modifier = Modifier.padding(16.dp),
                text =
                    "Note: This demo is best shown in portrait mode, as landscape mode" +
                        " may result in a compact height in certain devices. For any" +
                        " compact screen dimensions, use a Navigation Bar instead.",
            )
        }
    }
}