sliver_calendar 0.4.2

Display a calendar view for flutter.

example/lib/main.dart

import 'dart:async';
import 'dart:math';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_native_timezone/flutter_native_timezone.dart';
import 'package:sliver_calendar/sliver_calendar.dart';
import 'package:timezone/timezone.dart';

void main() async {
  // Comment this line to enable debug printing...
  debugPrint = (String message, {int wrapWidth}) {};

  ByteData loadedData;

  await Future.wait<void>(<Future<void>>[
    rootBundle.load('assets/timezone/2018c.tzf').then((ByteData data) {
      loadedData = data;
      print('loaded data');
    })
  ]);
  initializeDatabase(loadedData.buffer.asUint8List());
  runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Calendar',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      debugShowCheckedModeBanner: false,
      localizationsDelegates: const <
          LocalizationsDelegate<MaterialLocalizations>>[
        GlobalMaterialLocalizations.delegate
      ],
      supportedLocales: const <Locale>[
        const Locale('en', ''),
        const Locale('fr', ''),
      ],
      home: new MyHomePage(title: 'Flutter Calendar demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<CalendarEvent> events = <CalendarEvent>[];
  Location loc;
  Random random = new Random();

  Widget buildItem(BuildContext context, CalendarEvent e) {
    return new Card(
      child: new ListTile(
        title: new Text("Event ${e.index}"),
        subtitle: new Text("Yay for events"),
        leading: const Icon(Icons.gamepad),
      ),
    );
  }

  List<CalendarEvent> getEvents(DateTime start, DateTime end) {
    if (loc != null && events.length == 0) {
      TZDateTime nowTime =
          new TZDateTime.now(loc).subtract(new Duration(days: 5));
      for (int i = 0; i < 20; i++) {
        TZDateTime start =
            nowTime.add(new Duration(days: i + random.nextInt(10)));
        events.add(new CalendarEvent(
            index: i,
            instant: start,
            instantEnd: start.add(new Duration(minutes: 30))));
      }
    }
    return events;
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      body: new Column(
        children: <Widget>[
          new FutureBuilder<String>(
            future: FlutterNativeTimezone.getLocalTimezone(),
            builder: (BuildContext context, AsyncSnapshot<String> tz) {
              if (tz.hasData) {
                loc = getLocation(tz.data);
                TZDateTime nowTime = new TZDateTime.now(loc);
                return new Expanded(
                  child: new CalendarWidget(
                    initialDate: nowTime,
                    location: loc,
                    buildItem: buildItem,
                    getEvents: getEvents,
                    bannerHeader:
                        new AssetImage("assets/images/calendarheader.png"),
                    monthHeader:
                        new AssetImage("assets/images/calendarbanner.jpg"),
                    weekBeginsWithDay:
                        1, // Sunday = 0, Monday = 1, Tuesday = 2, ..., Saturday = 6
                  ),
                );
              } else {
                return new Center(
                  child: new Text("Getting the timezone..."),
                );
              }
            },
          ),
        ],
      ),
    );
  }
}