responsive_scaffold_nullsafe

Description:

responsive scaffold nullsafe

Null-Safe Version of Responsive Scaffold

responsive_scaffold_nullsafe #
View the online demo here!
On mobile it shows a list and pushes to details and on tablet it shows the List and the selected item.
Online Demo: https://fluttercommunity.github.io/responsive_scaffold/
Getting Started #
3 Column Layout #
example
Responsive Layout #
Follows Material Design Layout Docs.

Here is a demo on various sizes.






Example
import 'package:flutter/material.dart';
import 'package:responsive_scaffold/responsive_scaffold.dart';

class LayoutExample extends StatelessWidget {
const LayoutExample({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return ResponsiveScaffold(
title: const Text('Responsive Layout Example'),
drawer: ListView(
children: const <Widget>[
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings Page'),
),
ListTile(
leading: Icon(Icons.info),
title: Text('Info Page'),
),
ListTile(
leading: Icon(Icons.library_books),
title: Text('Library Page'),
),
ListTile(
leading: Icon(Icons.help),
title: Text('Help Page'),
),
],
),
endIcon: Icons.filter_list,
endDrawer: ListView(
children: <Widget>[
ListTile(
leading: const Icon(Icons.filter_list),
title: const Text('Filter List'),
subtitle: const Text('Hide and show items'),
trailing: Switch(
value: true,
onChanged: (val) {},
),
),
const ListTile(
leading: Icon(Icons.image_aspect_ratio),
title: Text('Size Settings'),
subtitle: Text('Change size of images'),
),
ListTile(
title: Slider(
value: 0.5,
onChanged: (val) {},
),
),
ListTile(
leading: const Icon(Icons.sort_by_alpha),
title: const Text('Sort List'),
subtitle: const Text('Change layout behavior'),
trailing: Switch(
value: false,
onChanged: (val) {},
),
),
],
),
trailing: IconButton(
icon: const Icon(Icons.search),
onPressed: () {},
),
body: Center(
child: ElevatedButton(
onPressed: () {
Navigator.pop(context);
},
child: const Text('Close'),
),
),
floatingActionButton: FloatingActionButton(
backgroundColor: Theme.of(context).accentColor,
onPressed: () {},
child: const Icon(Icons.add),
),
);
}
}

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Responsive List #

You can use this in two modes ResponsiveListScaffold and ResponsiveListScaffold.builder.
On Mobile the ListView will push to the details screen





On Tablet it will show a Master Detail View.
You can add additional Slivers to the Scrollview and the AppBar is optional.

Example
import 'package:flutter/material.dart';
import 'package:responsive_scaffold/responsive_scaffold.dart';

class ListExample extends StatefulWidget {
const ListExample({Key? key}) : super(key: key);

@override
_ListExampleState createState() => _ListExampleState();
}

class _ListExampleState extends State<ListExample> {
final _scaffoldKey = GlobalKey<ScaffoldState>();

late List<String> _items;

@override
void initState() {
_items = List.generate(20, (int index) => "test_$index");
super.initState();
}

@override
Widget build(BuildContext context) {
return ResponsiveListScaffold.builder(
scaffoldKey: _scaffoldKey,
detailBuilder: (BuildContext context, int? index, bool tablet) {
final i = _items[index!];
return DetailsScreen(
body: ExampleDetailsScreen(
items: _items,
row: i,
tablet: tablet,
onDelete: () {
setState(() {
_items.removeAt(index);
});
if (!tablet) Navigator.of(context).pop();
},
onChanged: (String value) {
setState(() {
_items[index] = value;
});
},
),
);
},
nullItems: const Center(child: CircularProgressIndicator()),
emptyItems: const Center(child: Text("No Items Found")),
slivers: const <Widget>[
SliverAppBar(
title: Text("App Bar"),
),
],
itemCount: _items.length,
itemBuilder: (BuildContext context, int index) {
final i = _items[index];
return ListTile(
leading: Text(i),
);
},
bottomNavigationBar: BottomAppBar(
elevation: 0.0,
child: IconButton(
icon: const Icon(Icons.share),
onPressed: () {},
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text("Snackbar!"),
),
);
},
child: const Icon(Icons.add),
),
);
}
}

class ExampleDetailsScreen extends StatelessWidget {
const ExampleDetailsScreen({
Key? key,
required List<String> items,
required this.row,
required this.tablet,
required this.onDelete,
required this.onChanged,
}) : _items = items,
super(key: key);

final List<String> _items;
final String row;
final bool tablet;
final VoidCallback onDelete;
final ValueChanged<String> onChanged;

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
elevation: 0.0,
automaticallyImplyLeading: !tablet,
title: const Text("Details"),
actions: [
IconButton(
icon: const Icon(Icons.share),
onPressed: () {
onChanged("$row ${DateTime.now().toString()}");
},
),
IconButton(
icon: const Icon(Icons.delete),
onPressed: onDelete,
),
],
),
bottomNavigationBar: BottomAppBar(
elevation: 0.0,
child: IconButton(
icon: const Icon(Icons.share),
onPressed: () {},
),
),
body: Center(
child: Text("Item: $row"),
),
);
}
}

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