anchored_sheets 1.2.23 
anchored_sheets: ^1.2.23 copied to clipboard
A Flutter package to create anchored sheets that can be dragged and snapped to different positions on the screen.
import 'package:anchored_sheets/anchored_sheets.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
/// Application state model using Provider for state management
class AppState extends ChangeNotifier {
String _selectedFilter = 'All';
String _selectedOption = 'None';
bool _notifications = true;
String _searchQuery = '';
// Getters
String get selectedFilter => _selectedFilter;
String get selectedOption => _selectedOption;
bool get notifications => _notifications;
String get searchQuery => _searchQuery;
// Methods to update state
void updateFilter(String filter) {
_selectedFilter = filter;
notifyListeners();
}
void updateOption(String option) {
_selectedOption = option;
notifyListeners();
}
void updateNotifications(bool enabled) {
_notifications = enabled;
notifyListeners();
}
void updateSearchQuery(String query) {
_searchQuery = query;
notifyListeners();
}
}
void main() {
runApp(
ChangeNotifierProvider(
create: (context) => AppState(),
child: const MyApp(),
),
);
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Anchored Sheets Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
useMaterial3: true,
),
home: const AnchoredSheetsDemo(),
);
}
}
class AnchoredSheetsDemo extends StatefulWidget {
const AnchoredSheetsDemo({super.key});
@override
State<AnchoredSheetsDemo> createState() => _AnchoredSheetsDemoState();
}
class _AnchoredSheetsDemoState extends State<AnchoredSheetsDemo> {
// Global keys for anchoring sheets to specific widgets
final GlobalKey _filterButtonKey = GlobalKey();
final GlobalKey _nestedSheetDemoKey = GlobalKey();
final GlobalKey _userAvatarKey = GlobalKey();
final GlobalKey _searchButtonKey = GlobalKey();
@override
Widget build(BuildContext context) {
return Consumer<AppState>(
builder: (context, appState, child) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.amber,
title: const Text('Anchored Sheets Demo'),
actions: [
// Search button that will anchor a search sheet
IconButton(
key: _searchButtonKey,
icon: const Icon(Icons.search),
onPressed: _showSearchSheet,
),
// User avatar that will anchor a profile sheet
Padding(
padding: const EdgeInsets.only(right: 16.0),
child: GestureDetector(
key: _userAvatarKey,
onTap: _showProfileSheet,
child: CircleAvatar(
backgroundColor: Theme.of(context).colorScheme.primary,
child: const Icon(Icons.person, color: Colors.white),
),
),
),
],
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Header section with action buttons
Wrap(
children: [
ElevatedButton.icon(
key: _filterButtonKey,
onPressed: () {
anchoredSheet(
isScrollControlled: true,
useSafeArea: true,
context: context,
builder: (context) {
return ListView.builder(
padding: EdgeInsets.zero,
itemCount: 20,
itemBuilder: (context, index) {
return ListTile(
title: Text(
'Itasdsadasdsadasdsadsadsadsadsadem $index',
),
subtitle: Text(
'aniqweoiweniweniweniwenwienwe $index',
),
onTap: () {
context.popAnchorSheet();
},
);
},
);
},
);
},
icon: const Icon(Icons.filter_list),
label: Text('Filter: ${appState.selectedFilter}'),
),
const SizedBox(width: 8),
ElevatedButton.icon(
key: _nestedSheetDemoKey,
onPressed: _showNestedSheetDemo,
icon: const Icon(Icons.layers),
label: const Text('Nested Demo'),
),
const SizedBox(width: 8),
],
),
Text(appState.notifications.toString()),
const SizedBox(height: 16),
],
),
),
);
},
);
}
void _showProfileSheet() async {
final result = await anchoredSheet(
context: context,
anchorKey: _userAvatarKey,
enableDrag: true,
showDragHandle: true,
builder:
(context) => Consumer<AppState>(
builder: (context, appState, child) {
return Column(
mainAxisSize: MainAxisSize.min,
children: [
const CircleAvatar(
radius: 30,
child: Icon(Icons.person, size: 30),
),
const SizedBox(height: 12),
const Text(
'John Doe',
style: TextStyle(fontWeight: FontWeight.bold),
),
const Text('john.doe@example.com'),
const SizedBox(height: 16),
SwitchListTile(
title: const Text('Notifications'),
value: appState.notifications,
onChanged: (value) {
appState.updateNotifications(value);
},
),
ListTile(
leading: const Icon(Icons.logout),
title: const Text('Sign Out'),
onTap: () {
context.popAnchorSheet(false);
},
),
],
);
},
),
);
if (result != null) {
debugPrint('Profile sheet completed with result: $result');
}
}
void _showNestedSheetDemo() async {
await anchoredSheet<String>(
context: context,
anchorKey: _nestedSheetDemoKey,
isScrollControlled: true,
useSafeArea: true,
showDragHandle: true,
enableDrag: true,
backgroundColor: Colors.blue.shade50,
builder:
(context) => Container(
padding: const EdgeInsets.all(20),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.layers, size: 48, color: Colors.blue),
const SizedBox(height: 16),
const Text(
'Anchored Sheet',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
const SizedBox(height: 8),
const Text(
'This sheet is anchored to the "Nested Demo" button.\nClick the button below to open a non-anchored sheet on top.',
textAlign: TextAlign.center,
),
const SizedBox(height: 24),
ElevatedButton.icon(
onPressed: () {
// Open a non-anchored sheet on top of this anchored sheet
// Using a simple function call instead of await to prevent context issues
_showNonAnchoredSheet();
},
icon: const Icon(Icons.open_in_new),
label: const Text('Open Non-Anchored Sheet'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
),
const SizedBox(height: 16),
TextButton(
onPressed: () => context.popAnchorSheet(),
child: const Text('Close Anchored Sheet'),
),
],
),
),
);
}
// Non-anchored sheet that opens on top of the anchored sheet
void _showNonAnchoredSheet() {
anchoredSheet<String>(
context: context,
// No anchorKey = center of screen positioning
isScrollControlled: true,
useSafeArea: true,
showDragHandle: true,
enableDrag: true,
backgroundColor: Colors.green.shade50,
builder:
(context) => Container(
padding: const EdgeInsets.all(20),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(
Icons.center_focus_strong,
size: 48,
color: Colors.green,
),
const SizedBox(height: 16),
const Text(
'Non-Anchored Sheet',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
const SizedBox(height: 8),
const Text(
'This sheet appears in the center of the screen (no anchor key).\nIt\'s stacked on top of the anchored sheet.',
textAlign: TextAlign.center,
),
const SizedBox(height: 20),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
TextButton(
onPressed: () => context.popAnchorSheet(),
child: const Text('Close This Sheet'),
),
ElevatedButton(
onPressed: () {
// Close this sheet and go back to the anchored one
context.popAnchorSheet();
},
child: const Text('Back to Anchored'),
),
],
),
],
),
),
);
}
// Anchored search sheet
void _showSearchSheet() async {
final result = await anchoredSheet<String>(
context: context,
anchorKey: _searchButtonKey,
enableDrag: true,
showDragHandle: true,
builder:
(context) => Column(
mainAxisSize: MainAxisSize.min,
children: [
TextField(
autofocus: true,
decoration: const InputDecoration(
hintText: 'Search...',
prefixIcon: Icon(Icons.search),
border: OutlineInputBorder(),
),
onSubmitted:
(value) => context.popAnchorSheet(
value,
), // Use Navigator.pop instead
),
],
),
);
if (result != null && result.isNotEmpty) {
if (mounted) {
final appState = Provider.of<AppState>(context, listen: false);
appState.updateSearchQuery(result);
}
}
}
// Anchored profile sheet
// ========== Modal Conflict Testing Methods ==========
void _showTestSheetA() {
anchoredSheet(
context: context,
useSafeArea: true,
backgroundColor: Colors.blue.shade50,
builder:
(context) => Container(
padding: const EdgeInsets.all(20),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.looks_one, size: 48, color: Colors.blue),
const SizedBox(height: 16),
const Text(
'Test Sheet A',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
const SizedBox(height: 8),
const Text(
'Click "Same Sheet A" button to test duplicate prevention.\n'
'Click "Replace with B" to test replacement.',
textAlign: TextAlign.center,
),
const SizedBox(height: 16),
ElevatedButton(
onPressed:
() => _showTestSheetA(), // Same ID - should dismiss
style: ElevatedButton.styleFrom(backgroundColor: Colors.blue),
child: const Text('Same Sheet A (Should Dismiss)'),
),
const SizedBox(height: 8),
ElevatedButton(
onPressed:
() => _showTestSheetB(), // Different ID - should replace
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
),
child: const Text('Replace with Sheet B'),
),
const SizedBox(height: 16),
TextButton(
onPressed: () => context.popAnchorSheet(),
child: const Text('Close'),
),
],
),
),
);
}
void _showTestSheetB() {
anchoredSheet(
context: context,
useSafeArea: true,
backgroundColor: Colors.green.shade50,
builder:
(context) => Container(
padding: const EdgeInsets.all(20),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.looks_two, size: 48, color: Colors.green),
const SizedBox(height: 16),
const Text(
'Test Sheet B',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
const SizedBox(height: 8),
const Text(
'This sheet replaced Sheet A!\n'
'Click "Same Sheet B" to test duplicate prevention.\n'
'Click "Back to A" to test replacement.',
textAlign: TextAlign.center,
),
const SizedBox(height: 16),
ElevatedButton(
onPressed:
() => _showTestSheetB(), // Same ID - should dismiss
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
),
child: const Text('Same Sheet B (Should Dismiss)'),
),
const SizedBox(height: 8),
ElevatedButton(
onPressed:
() => _showTestSheetA(), // Different ID - should replace
style: ElevatedButton.styleFrom(backgroundColor: Colors.blue),
child: const Text('Back to Sheet A'),
),
const SizedBox(height: 16),
TextButton(
onPressed: () => context.popAnchorSheet(),
child: const Text('Close'),
),
],
),
),
);
}
}
class _FormSheetContent extends StatefulWidget {
@override
_FormSheetContentState createState() => _FormSheetContentState();
}
class _FormSheetContentState extends State<_FormSheetContent> {
final _formKey = GlobalKey<FormState>();
String _selectedOption = '';
String _textInput = '';
@override
Widget build(BuildContext context) {
return Container(
height: 350,
padding: const EdgeInsets.all(20),
child: Form(
key: _formKey,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const Text(
'Interactive Form',
style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
),
const SizedBox(height: 16),
TextFormField(
decoration: const InputDecoration(
labelText: 'Enter some text',
border: OutlineInputBorder(),
),
onSaved: (value) => _textInput = value ?? '',
validator: (value) {
if (value?.isEmpty ?? true) {
return 'Please enter some text';
}
return null;
},
),
const SizedBox(height: 16),
const Text('Select an option:'),
RadioListTile<String>(
title: const Text('Option A'),
value: 'Option A',
groupValue: _selectedOption,
onChanged: (value) => setState(() => _selectedOption = value!),
),
RadioListTile<String>(
title: const Text('Option B'),
value: 'Option B',
groupValue: _selectedOption,
onChanged: (value) => setState(() => _selectedOption = value!),
),
const Spacer(),
Row(
children: [
Expanded(
child: TextButton(
onPressed: () => context.popAnchorSheet(null),
child: const Text('Cancel'),
),
),
const SizedBox(width: 8),
Expanded(
child: ElevatedButton(
onPressed: () {
if (_formKey.currentState!.validate() &&
_selectedOption.isNotEmpty) {
_formKey.currentState!.save();
context.popAnchorSheet({
'option': _selectedOption,
'text': _textInput,
});
}
},
child: const Text('Submit'),
),
),
],
),
],
),
),
);
}
}
/// A reusable filter option widget following Flutter best practicesMetadata
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Metadata
A Flutter package to create anchored sheets that can be dragged and snapped to different positions on the screen.
Repository (GitHub)
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Documentation
License
MIT (license)
