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samples/veggieseasons/lib/screens/list.dart

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// Copyright 2018 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/cupertino.dart';
import 'package:flutter/widgets.dart';
import 'package:intl/intl.dart';
import 'package:scoped_model/scoped_model.dart';
import 'package:veggieseasons/data/app_state.dart';
import 'package:veggieseasons/data/preferences.dart';
import 'package:veggieseasons/data/veggie.dart';
import 'package:veggieseasons/styles.dart';
import 'package:veggieseasons/widgets/veggie_card.dart';
class ListScreen extends StatelessWidget {
List<Widget> _generateVeggieRows(List<Veggie> veggies, Preferences prefs) {
final cards = new List<Widget>();
for (Veggie veggie in veggies) {
cards.add(Padding(
padding: EdgeInsets.only(left: 16.0, right: 16.0, bottom: 24.0),
child: FutureBuilder<Set<VeggieCategory>>(
future: prefs.preferredCategories,
builder: (context, snapshot) {
final data = snapshot.data ?? Set<VeggieCategory>();
return VeggieCard(veggie, data.contains(veggie.category));
}),
));
}
return cards;
}
@override
Widget build(BuildContext context) {
return CupertinoTabView(
builder: (context) {
String dateString = DateFormat.jms("en_US").format(DateTime.now());
final appState =
ScopedModel.of<AppState>(context, rebuildOnChange: true);
final prefs =
ScopedModel.of<Preferences>(context, rebuildOnChange: true);
final rows = <Widget>[];
rows.add(
Padding(
padding: const EdgeInsets.fromLTRB(16.0, 24.0, 16.0, 16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(dateString.toUpperCase(), style: Styles.minorText),
Text('In season today', style: Styles.headlineText),
],
),
),
);
rows.addAll(_generateVeggieRows(appState.availableVeggies, prefs));
rows.add(
Padding(
padding: const EdgeInsets.fromLTRB(16.0, 24.0, 16.0, 16.0),
child: Text('Not in season', style: Styles.headlineText),
),
);
rows.addAll(_generateVeggieRows(appState.unavailableVeggies, prefs));
return DecoratedBox(
decoration: BoxDecoration(color: Color(0xffffffff)),
child: ListView(
children: rows,
),
);
},
);
}
}