| /* |
| * 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.compose.material3.samples |
| |
| import androidx.annotation.Sampled |
| import androidx.compose.foundation.layout.Arrangement |
| import androidx.compose.foundation.layout.fillMaxWidth |
| import androidx.compose.foundation.layout.padding |
| import androidx.compose.foundation.lazy.LazyColumn |
| import androidx.compose.material.icons.Icons |
| import androidx.compose.material.icons.filled.Favorite |
| import androidx.compose.material.icons.filled.Menu |
| import androidx.compose.material3.ExperimentalMaterial3Api |
| import androidx.compose.material3.Icon |
| import androidx.compose.material3.IconButton |
| import androidx.compose.material3.MaterialTheme |
| import androidx.compose.material3.Scaffold |
| import androidx.compose.material3.SmallCenteredTopAppBar |
| import androidx.compose.material3.SmallTopAppBar |
| import androidx.compose.material3.Text |
| import androidx.compose.material3.TopAppBarDefaults |
| import androidx.compose.runtime.Composable |
| import androidx.compose.runtime.remember |
| import androidx.compose.ui.Modifier |
| import androidx.compose.ui.input.nestedscroll.nestedScroll |
| import androidx.compose.ui.unit.dp |
| |
| /** |
| * A sample for a simple use of [SmallTopAppBar]. |
| * |
| * The top app bar here does not react to any scroll events in the content under it. |
| */ |
| @OptIn(ExperimentalMaterial3Api::class) |
| @Sampled |
| @Composable |
| fun SimpleSmallTopAppBar() { |
| Scaffold( |
| topBar = { |
| SmallTopAppBar( |
| title = { Text("Simple TopAppBar") }, |
| navigationIcon = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Menu, contentDescription = "Localized description") |
| } |
| }, |
| actions = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Favorite, contentDescription = "Localized description") |
| } |
| } |
| ) |
| }, |
| content = { innerPadding -> |
| LazyColumn( |
| contentPadding = innerPadding, |
| verticalArrangement = Arrangement.spacedBy(8.dp) |
| ) { |
| val list = (0..75).map { it.toString() } |
| items(count = list.size) { |
| Text( |
| text = list[it], |
| style = MaterialTheme.typography.bodyLarge, |
| modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp) |
| ) |
| } |
| } |
| } |
| ) |
| } |
| |
| /** |
| * A sample for a simple use of [SmallCenteredTopAppBar]. |
| * |
| * The top app bar here does not react to any scroll events in the content under it. |
| */ |
| @OptIn(ExperimentalMaterial3Api::class) |
| @Sampled |
| @Composable |
| fun SimpleCenteredTopAppBar() { |
| Scaffold( |
| topBar = { |
| SmallCenteredTopAppBar( |
| title = { Text("Centered TopAppBar") }, |
| navigationIcon = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Menu, contentDescription = "Localized description") |
| } |
| }, |
| actions = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Favorite, contentDescription = "Localized description") |
| } |
| } |
| ) |
| }, |
| content = { innerPadding -> |
| LazyColumn( |
| contentPadding = innerPadding, |
| verticalArrangement = Arrangement.spacedBy(8.dp) |
| ) { |
| val list = (0..75).map { it.toString() } |
| items(count = list.size) { |
| Text( |
| text = list[it], |
| style = MaterialTheme.typography.bodyLarge, |
| modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp) |
| ) |
| } |
| } |
| } |
| ) |
| } |
| |
| /** |
| * A sample for a pinned [SmallTopAppBar]. |
| * |
| * The top app bar here is pinned to its location and changes its container color when the content |
| * under it is scrolled. |
| */ |
| @OptIn(ExperimentalMaterial3Api::class) |
| @Sampled |
| @Composable |
| fun PinnedSmallTopAppBar() { |
| val scrollBehavior = remember { TopAppBarDefaults.pinnedScrollBehavior() } |
| Scaffold( |
| modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection), |
| topBar = { |
| SmallTopAppBar( |
| title = { Text("Small TopAppBar") }, |
| navigationIcon = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Menu, contentDescription = "Localized description") |
| } |
| }, |
| actions = { |
| // RowScope here, so these icons will be placed horizontally |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Favorite, contentDescription = "Localized description") |
| } |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Favorite, contentDescription = "Localized description") |
| } |
| }, |
| scrollBehavior = scrollBehavior |
| ) |
| }, |
| content = { innerPadding -> |
| LazyColumn( |
| contentPadding = innerPadding, |
| verticalArrangement = Arrangement.spacedBy(8.dp) |
| ) { |
| val list = (0..75).map { it.toString() } |
| items(count = list.size) { |
| Text( |
| text = list[it], |
| style = MaterialTheme.typography.bodyLarge, |
| modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp) |
| ) |
| } |
| } |
| } |
| ) |
| } |
| |
| /** |
| * A sample for a [SmallTopAppBar] that collapses when the content is scrolled up, and |
| * appears when the content scrolled down. |
| */ |
| @OptIn(ExperimentalMaterial3Api::class) |
| @Sampled |
| @Composable |
| fun EnterAlwaysSmallTopAppBar() { |
| val scrollBehavior = remember { TopAppBarDefaults.enterAlwaysScrollBehavior() } |
| Scaffold( |
| modifier = Modifier.nestedScroll(scrollBehavior.nestedScrollConnection), |
| topBar = { |
| SmallTopAppBar( |
| title = { Text("Small TopAppBar") }, |
| navigationIcon = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Menu, contentDescription = "Localized description") |
| } |
| }, |
| actions = { |
| IconButton(onClick = { /* doSomething() */ }) { |
| Icon(Icons.Filled.Favorite, contentDescription = "Localized description") |
| } |
| }, |
| scrollBehavior = scrollBehavior |
| ) |
| }, |
| content = { innerPadding -> |
| LazyColumn( |
| contentPadding = innerPadding, |
| verticalArrangement = Arrangement.spacedBy(8.dp) |
| ) { |
| val list = (0..75).map { it.toString() } |
| items(count = list.size) { |
| Text( |
| text = list[it], |
| style = MaterialTheme.typography.bodyLarge, |
| modifier = Modifier.fillMaxWidth().padding(horizontal = 16.dp) |
| ) |
| } |
| } |
| } |
| ) |
| } |