SwipeDismissableNavHostController.kt
/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.wear.compose.navigation
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.runtime.State
import androidx.navigation.NavBackStackEntry
import androidx.navigation.NavController
import androidx.navigation.NavHostController
import androidx.navigation.compose.rememberNavController
/**
* Creates a NavHostController that handles the adding of the [WearNavigator]
* from androidx.wear.compose.navigation.
*/
@Composable
public fun rememberSwipeDismissableNavController(): NavHostController {
return rememberNavController(remember { WearNavigator() })
}
/**
* Gets the current navigation back stack entry as a [State]. When the given navController
* changes the back stack due to a [NavController.navigate] or [NavController.popBackStack] this
* will trigger a recompose and return the top entry on the back stack.
*
* @return state of the current back stack entry
*/
@Composable
public fun NavController.currentBackStackEntryAsState(): State<NavBackStackEntry?> {
return currentBackStackEntryFlow.collectAsState(null)
}