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Added Compose adaptive layouts snippets (#165)
* Added Compose adaptive layouts snippets * Apply Spotless * Fixed region tags --------- Co-authored-by: Ian G. Clifton <[email protected]>
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...rc/main/java/com/example/compose/snippets/adaptivelayouts/SampleListDetailPaneScaffold.kt
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| /* | ||
| * Copyright 2023 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.adaptivelayouts | ||
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| import androidx.compose.foundation.background | ||
| import androidx.compose.foundation.clickable | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.Spacer | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.foundation.lazy.LazyColumn | ||
| import androidx.compose.material3.Card | ||
| import androidx.compose.material3.ListItem | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.material3.adaptive.ExperimentalMaterial3AdaptiveApi | ||
| import androidx.compose.material3.adaptive.ListDetailPaneScaffold | ||
| import androidx.compose.material3.adaptive.ListDetailPaneScaffoldRole | ||
| import androidx.compose.material3.adaptive.rememberListDetailPaneScaffoldState | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.saveable.rememberSaveable | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.unit.sp | ||
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| @OptIn(ExperimentalMaterial3AdaptiveApi::class) | ||
| @Composable | ||
| fun SampleListDetailPaneScaffoldParts() { | ||
| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part02] | ||
| val state = rememberListDetailPaneScaffoldState() | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part02] | ||
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| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part01] | ||
| var selectedItem: MyItem? by rememberSaveable { mutableStateOf(null) } | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part01] | ||
|
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| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part03] | ||
| ListDetailPaneScaffold( | ||
| scaffoldState = state, | ||
| /* ... */ | ||
| // [START_EXCLUDE] | ||
| listPane = {}, | ||
| detailPane = {}, | ||
| // [END_EXCLUDE] | ||
| ) | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part03] | ||
|
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| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part04] | ||
| ListDetailPaneScaffold( | ||
| scaffoldState = state, | ||
| listPane = { | ||
| MyList( | ||
| onItemClick = { id -> | ||
| // Set current item | ||
| selectedItem = id | ||
| // Switch focus to details pane | ||
| state.navigateTo(ListDetailPaneScaffoldRole.Detail) | ||
| } | ||
| ) | ||
| }, | ||
| /* ... */ | ||
| // [START_EXCLUDE] | ||
| detailPane = {}, | ||
| // [END_EXCLUDE] | ||
| ) | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part04] | ||
|
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| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part05] | ||
| ListDetailPaneScaffold( | ||
| scaffoldState = state, | ||
| listPane = /* ... */ | ||
| // [START_EXCLUDE] | ||
| {}, | ||
| // [END_EXCLUDE] | ||
| detailPane = { | ||
| selectedItem?.let { item -> | ||
| MyDetails(item) | ||
| } | ||
| }, | ||
| ) | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_part05] | ||
| } | ||
|
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| @OptIn(ExperimentalMaterial3AdaptiveApi::class) | ||
| @Preview | ||
| @Composable | ||
| fun SampleListDetailPaneScaffoldFull() { | ||
| // [START android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_full] | ||
| // Create the ListDetailPaneScaffoldState | ||
| val state = rememberListDetailPaneScaffoldState() | ||
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| // Currently selected item | ||
| var selectedItem: MyItem? by rememberSaveable { mutableStateOf(null) } | ||
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| ListDetailPaneScaffold( | ||
| scaffoldState = state, | ||
| listPane = { | ||
| MyList( | ||
| onItemClick = { id -> | ||
| // Set current item | ||
| selectedItem = id | ||
| // Display the details pane | ||
| state.navigateTo(ListDetailPaneScaffoldRole.Detail) | ||
| }, | ||
| ) | ||
| }, | ||
| detailPane = { | ||
| // Show the details pane content if selected item is available | ||
| selectedItem?.let { item -> | ||
| MyDetails(item) | ||
| } | ||
| }, | ||
| ) | ||
| // [END android_compose_adaptivelayouts_sample_list_detail_pane_scaffold_full] | ||
| } | ||
|
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| @Composable | ||
| fun MyList( | ||
| onItemClick: (MyItem) -> Unit, | ||
| ) { | ||
| Card { | ||
| LazyColumn { | ||
| shortStrings.forEachIndexed { id, string -> | ||
| item { | ||
| ListItem( | ||
| modifier = Modifier | ||
| .background(Color.Magenta) | ||
| .clickable { | ||
| onItemClick(MyItem(id)) | ||
| }, | ||
| headlineContent = { | ||
| Text( | ||
| text = string, | ||
| ) | ||
| }, | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| @Composable | ||
| fun MyDetails(item: MyItem) { | ||
| val text = shortStrings[item.id] | ||
| Card { | ||
| Column( | ||
| Modifier | ||
| .fillMaxSize() | ||
| .padding(16.dp) | ||
| ) { | ||
| Text( | ||
| text = "Details page for $text", | ||
| fontSize = 24.sp, | ||
| ) | ||
| Spacer(Modifier.size(16.dp)) | ||
| Text( | ||
| text = "TODO: Add great details here" | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
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| class MyItem(val id: Int) | ||
|
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| val shortStrings = listOf( | ||
| "Android", | ||
| "Petit four", | ||
| "Cupcake", | ||
| "Donut", | ||
| "Eclair", | ||
| "Froyo", | ||
| "Gingerbread", | ||
| "Honeycomb", | ||
| "Ice cream sandwich", | ||
| "Jelly bean", | ||
| "Kitkat", | ||
| "Lollipop", | ||
| "Marshmallow", | ||
| "Nougat", | ||
| "Oreo", | ||
| "Pie", | ||
| ) |
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