| /* |
| * Copyright 2020 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.navigation.compose.samples |
| |
| import androidx.annotation.Sampled |
| import androidx.annotation.StringRes |
| import androidx.compose.foundation.ScrollableColumn |
| import androidx.compose.foundation.Text |
| import androidx.compose.foundation.layout.Column |
| import androidx.compose.foundation.layout.Spacer |
| import androidx.compose.foundation.layout.fillMaxSize |
| import androidx.compose.foundation.layout.fillMaxWidth |
| import androidx.compose.foundation.layout.padding |
| import androidx.compose.material.Button |
| import androidx.compose.material.ButtonConstants |
| import androidx.compose.material.Divider |
| import androidx.compose.runtime.Composable |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.graphics.Color |
| import androidx.compose.ui.graphics.Color.Companion.LightGray |
| import androidx.compose.ui.res.stringResource |
| import androidx.compose.ui.unit.dp |
| import androidx.compose.ui.unit.sp |
| import androidx.navigation.NavController |
| import androidx.navigation.NavHostController |
| import androidx.navigation.compose.NavHost |
| import androidx.navigation.compose.composable |
| import androidx.navigation.compose.navigate |
| import androidx.navigation.compose.rememberNavController |
| |
| sealed class Screen(val route: String, @StringRes val resourceId: Int) { |
| object Profile : Screen("profile", R.string.profile) |
| object Dashboard : Screen("dashboard", R.string.dashboard) |
| object Scrollable : Screen("scrollable", R.string.scrollable) |
| } |
| |
| @Sampled |
| @Composable |
| fun BasicNav() { |
| val navController = rememberNavController() |
| NavHost(navController, startDestination = "profile") { |
| composable("profile") { Profile(navController) } |
| composable("dashboard") { Dashboard(navController) } |
| composable("scrollable") { Scrollable(navController) } |
| } |
| } |
| |
| @Composable |
| fun Profile(navController: NavHostController) { |
| Column(Modifier.fillMaxSize().then(Modifier.padding(8.dp))) { |
| Text(text = stringResource(Screen.Profile.resourceId)) |
| NavigateButton(stringResource(Screen.Dashboard.resourceId)) { |
| navController.navigate(Screen.Dashboard.route) |
| } |
| Divider(color = Color.Black) |
| NavigateButton(stringResource(Screen.Scrollable.resourceId)) { |
| navController.navigate(Screen.Dashboard.route) |
| } |
| Spacer(Modifier.weight(1f)) |
| NavigateBackButton(navController) |
| } |
| } |
| |
| @Composable |
| fun Dashboard(navController: NavController, title: String? = null) { |
| Column(Modifier.fillMaxSize().then(Modifier.padding(8.dp))) { |
| Text(text = title ?: stringResource(Screen.Dashboard.resourceId)) |
| Spacer(Modifier.weight(1f)) |
| NavigateBackButton(navController) |
| } |
| } |
| |
| @Composable |
| fun Scrollable(navController: NavController) { |
| Column(Modifier.fillMaxSize().then(Modifier.padding(8.dp))) { |
| NavigateButton(stringResource(Screen.Dashboard.resourceId)) { |
| navController.navigate(Screen.Dashboard.route) |
| } |
| ScrollableColumn(Modifier.weight(1f)) { |
| phrases.forEach { phrase -> |
| Text(phrase, fontSize = 30.sp) |
| } |
| } |
| NavigateBackButton(navController) |
| } |
| } |
| |
| @Composable |
| fun NavigateButton( |
| text: String, |
| listener: () -> Unit = { } |
| ) { |
| Button( |
| onClick = listener, |
| colors = ButtonConstants.defaultButtonColors(backgroundColor = LightGray), |
| modifier = Modifier.fillMaxWidth() |
| ) { |
| Text(text = "Navigate to $text") |
| } |
| } |
| |
| @Composable |
| fun NavigateBackButton(navController: NavController) { |
| if (navController.previousBackStackEntry != null) { |
| Button( |
| onClick = { navController.popBackStack() }, |
| colors = ButtonConstants.defaultButtonColors(backgroundColor = LightGray), |
| modifier = Modifier.fillMaxWidth() |
| ) { |
| Text(text = "Go to Previous screen") |
| } |
| } |
| } |
| |
| private val phrases = listOf( |
| "Easy As Pie", |
| "Wouldn't Harm a Fly", |
| "No-Brainer", |
| "Keep On Truckin'", |
| "An Arm and a Leg", |
| "Down To Earth", |
| "Under the Weather", |
| "Up In Arms", |
| "Cup Of Joe", |
| "Not the Sharpest Tool in the Shed", |
| "Ring Any Bells?", |
| "Son of a Gun", |
| "Hard Pill to Swallow", |
| "Close But No Cigar", |
| "Beating a Dead Horse", |
| "If You Can't Stand the Heat, Get Out of the Kitchen", |
| "Cut To The Chase", |
| "Heads Up", |
| "Goody Two-Shoes", |
| "Fish Out Of Water", |
| "Cry Over Spilt Milk", |
| "Elephant in the Room", |
| "There's No I in Team", |
| "Poke Fun At", |
| "Talk the Talk", |
| "Know the Ropes", |
| "Fool's Gold", |
| "It's Not Brain Surgery", |
| "Fight Fire With Fire", |
| "Go For Broke" |
| ) |