diff --git a/compose/snippets/src/main/java/com/example/compose/snippets/navigation3/decorators/DecoratorSnippets.kt b/compose/snippets/src/main/java/com/example/compose/snippets/navigation3/decorators/DecoratorSnippets.kt new file mode 100644 index 00000000..4fec8c5d --- /dev/null +++ b/compose/snippets/src/main/java/com/example/compose/snippets/navigation3/decorators/DecoratorSnippets.kt @@ -0,0 +1,64 @@ +/* + * Copyright 2025 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 + * + * https://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 com.example.compose.snippets.navigation3.decorators + +import android.util.Log +import androidx.compose.material3.Text +import androidx.compose.runtime.Composable +import androidx.compose.runtime.remember +import androidx.navigation3.runtime.NavEntryDecorator +import androidx.navigation3.runtime.NavKey +import androidx.navigation3.runtime.entryProvider +import androidx.navigation3.runtime.rememberNavBackStack +import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator +import androidx.navigation3.ui.NavDisplay +import com.example.compose.snippets.navigation3.savingstate.Home +import kotlinx.serialization.Serializable + +// [START android_compose_navigation3_decorator_1] +// import androidx.navigation3.runtime.NavEntryDecorator +class CustomNavEntryDecorator : NavEntryDecorator( + decorate = { entry -> + Log.d("CustomNavEntryDecorator", "entry with ${entry.contentKey} entered composition and was decorated") + entry.Content() + }, + onPop = { contentKey -> Log.d("CustomNavEntryDecorator", "entry with $contentKey was popped") } +) +// [END android_compose_navigation3_decorator_1] + +@Serializable +data object Home : NavKey + +@Composable +fun DecoratorsBasic() { + // [START android_compose_navigation3_decorator_2] + + // import androidx.navigation3.runtime.rememberSaveableStateHolderNavEntryDecorator + NavDisplay( + entryDecorators = listOf( + rememberSaveableStateHolderNavEntryDecorator(), + remember { CustomNavEntryDecorator() } + ), + // [START_EXCLUDE] + backStack = rememberNavBackStack(Home), + entryProvider = entryProvider { + entry { Text("Welcome to Nav3") } + } + // [END_EXCLUDE] + ) + // [END android_compose_navigation3_decorator_2] +}