weather 1.4.0

weather: ^1.4.0 copied to clipboard

example/lib/main.dart

/*
 * Copyright 2018 Copenhagen Center for Health Technology (CACHET) at the
 * Technical University of Denmark (DTU).
 * Use of this source code is governed by a MIT-style license that can be
 * found in the LICENSE file.
 */
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:weather/weather.dart';

enum AppState { NOT_DOWNLOADED, DOWNLOADING, FINISHED_DOWNLOADING }

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String key = '856822fd8e22db5e1ba48c0e7d69844a';
  WeatherFactory ws;
  List<Weather> _data = [];
  AppState _state = AppState.NOT_DOWNLOADED;
  double lat, lon;

  @override
  void initState() {
    super.initState();
    ws = new WeatherFactory(key);
  }

  void queryForecast() async {
    /// Removes keyboard
    FocusScope.of(context).requestFocus(FocusNode());
    setState(() {
      _state = AppState.DOWNLOADING;
    });

    List<Weather> forecasts = await ws.fiveDayForecastByLocation(lat, lon);
    setState(() {
      _data = forecasts;
      _state = AppState.FINISHED_DOWNLOADING;
    });
  }

  void queryWeather() async {
    /// Removes keyboard
    FocusScope.of(context).requestFocus(FocusNode());

    setState(() {
      _state = AppState.DOWNLOADING;
    });

    Weather weather = await ws.currentWeatherByLocation(lat, lon);
    setState(() {
      _data = [weather];
      _state = AppState.FINISHED_DOWNLOADING;
    });
  }

  Widget contentFinishedDownload() {
    return Center(
      child: ListView.separated(
        itemCount: _data.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(_data[index].toString()),
          );
        },
        separatorBuilder: (context, index) {
          return Divider();
        },
      ),
    );
  }

  Widget contentDownloading() {
    return Container(
        margin: EdgeInsets.all(25),
        child: Column(children: [
          Text(
            'Fetching Weather...',
            style: TextStyle(fontSize: 20),
          ),
          Container(
              margin: EdgeInsets.only(top: 50),
              child: Center(child: CircularProgressIndicator(strokeWidth: 10)))
        ]));
  }

  Widget contentNotDownloaded() {
    return Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Text(
            'Press the button to download the Weather forecast',
          ),
        ],
      ),
    );
  }

  Widget _resultView() => _state == AppState.FINISHED_DOWNLOADING
      ? contentFinishedDownload()
      : _state == AppState.DOWNLOADING
          ? contentDownloading()
          : contentNotDownloaded();

  void _saveLat(String input) {
    lat = double.tryParse(input);
    print(lat);
  }

  void _saveLon(String input) {
    lon = double.tryParse(input);
    print(lon);
  }

  Widget _coordinateInputs() {
    return Row(
      children: <Widget>[
        Expanded(
          child: Container(
              margin: EdgeInsets.all(5),
              child: TextField(
                  decoration: InputDecoration(
                      border: OutlineInputBorder(),
                      hintText: 'Enter latitude'),
                  keyboardType: TextInputType.number,
                  onChanged: _saveLat,
                  onSubmitted: _saveLat)),
        ),
        Expanded(
            child: Container(
                margin: EdgeInsets.all(5),
                child: TextField(
                    decoration: InputDecoration(
                        border: OutlineInputBorder(),
                        hintText: 'Enter longitude'),
                    keyboardType: TextInputType.number,
                    onChanged: _saveLon,
                    onSubmitted: _saveLon)))
      ],
    );
  }

  Widget _buttons() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Container(
          margin: EdgeInsets.all(5),
          child: FlatButton(
            child: Text(
              'Fetch weather',
              style: TextStyle(color: Colors.white),
            ),
            onPressed: queryWeather,
            color: Colors.blue,
          ),
        ),
        Container(
            margin: EdgeInsets.all(5),
            child: FlatButton(
              child: Text(
                'Fetch forecast',
                style: TextStyle(color: Colors.white),
              ),
              onPressed: queryForecast,
              color: Colors.blue,
            ))
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          appBar: AppBar(
            title: Text('Weather Example App'),
          ),
          body: Column(
            children: <Widget>[
              _coordinateInputs(),
              _buttons(),
              Text(
                'Output:',
                style: TextStyle(fontSize: 20),
              ),
              Divider(
                height: 20.0,
                thickness: 2.0,
              ),
              Expanded(child: _resultView())
            ],
          )),
    );
  }
}