/
NiaApp.kt
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/
NiaApp.kt
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/*
* Copyright 2022 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.google.samples.apps.nowinandroid.ui
import androidx.compose.foundation.layout.ExperimentalLayoutApi
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.consumedWindowInsets
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawing
import androidx.compose.foundation.layout.safeDrawingPadding
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.material.ripple.LocalRippleTheme
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.Icon
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.NavigationBar
import androidx.compose.material3.NavigationBarItem
import androidx.compose.material3.NavigationRail
import androidx.compose.material3.NavigationRailItem
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.material3.windowsizeclass.WindowSizeClass
import androidx.compose.material3.windowsizeclass.WindowWidthSizeClass
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import androidx.navigation.NavDestination
import androidx.navigation.NavDestination.Companion.hierarchy
import androidx.navigation.compose.currentBackStackEntryAsState
import androidx.navigation.compose.rememberNavController
import com.google.samples.apps.nowinandroid.core.ui.ClearRippleTheme
import com.google.samples.apps.nowinandroid.core.ui.component.NiaBackground
import com.google.samples.apps.nowinandroid.core.ui.theme.NiaTheme
import com.google.samples.apps.nowinandroid.navigation.NiaNavHost
import com.google.samples.apps.nowinandroid.navigation.NiaTopLevelNavigation
import com.google.samples.apps.nowinandroid.navigation.TOP_LEVEL_DESTINATIONS
import com.google.samples.apps.nowinandroid.navigation.TopLevelDestination
@OptIn(ExperimentalMaterial3Api::class, ExperimentalLayoutApi::class)
@Composable
fun NiaApp(windowSizeClass: WindowSizeClass) {
NiaTheme {
val navController = rememberNavController()
val niaTopLevelNavigation = remember(navController) {
NiaTopLevelNavigation(navController)
}
val navBackStackEntry by navController.currentBackStackEntryAsState()
val currentDestination = navBackStackEntry?.destination
NiaBackground {
Scaffold(
modifier = Modifier,
containerColor = Color.Transparent,
contentColor = MaterialTheme.colorScheme.onBackground,
bottomBar = {
if (windowSizeClass.widthSizeClass == WindowWidthSizeClass.Compact) {
NiABottomBar(
onNavigateToTopLevelDestination = niaTopLevelNavigation::navigateTo,
currentDestination = currentDestination
)
}
}
) { padding ->
Row(
Modifier
.fillMaxSize()
.windowInsetsPadding(
WindowInsets.safeDrawing.only(
WindowInsetsSides.Horizontal
)
)
) {
if (windowSizeClass.widthSizeClass != WindowWidthSizeClass.Compact) {
NiANavRail(
onNavigateToTopLevelDestination = niaTopLevelNavigation::navigateTo,
currentDestination = currentDestination,
modifier = Modifier.safeDrawingPadding()
)
}
NiaNavHost(
windowSizeClass = windowSizeClass,
navController = navController,
modifier = Modifier
.padding(padding)
.consumedWindowInsets(padding)
)
}
}
}
}
}
@Composable
private fun NiANavRail(
onNavigateToTopLevelDestination: (TopLevelDestination) -> Unit,
currentDestination: NavDestination?,
modifier: Modifier = Modifier,
) {
NavigationRail(modifier = modifier) {
TOP_LEVEL_DESTINATIONS.forEach { destination ->
val selected =
currentDestination?.hierarchy?.any { it.route == destination.route } == true
NavigationRailItem(
selected = selected,
onClick = { onNavigateToTopLevelDestination(destination) },
icon = {
Icon(
if (selected) destination.selectedIcon else destination.unselectedIcon,
contentDescription = null
)
},
label = { Text(stringResource(destination.iconTextId)) }
)
}
}
}
@Composable
private fun NiABottomBar(
onNavigateToTopLevelDestination: (TopLevelDestination) -> Unit,
currentDestination: NavDestination?
) {
// Wrap the navigation bar in a surface so the color behind the system
// navigation is equal to the container color of the navigation bar.
Surface(color = MaterialTheme.colorScheme.surface) {
CompositionLocalProvider(LocalRippleTheme provides ClearRippleTheme) {
NavigationBar(
modifier = Modifier.windowInsetsPadding(
WindowInsets.safeDrawing.only(
WindowInsetsSides.Horizontal + WindowInsetsSides.Bottom
)
),
tonalElevation = 0.dp
) {
TOP_LEVEL_DESTINATIONS.forEach { destination ->
val selected =
currentDestination?.hierarchy?.any { it.route == destination.route } == true
NavigationBarItem(
selected = selected,
onClick = { onNavigateToTopLevelDestination(destination) },
icon = {
Icon(
if (selected) {
destination.selectedIcon
} else {
destination.unselectedIcon
},
contentDescription = null
)
},
label = { Text(stringResource(destination.iconTextId)) }
)
}
}
}
}
}