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main.dart
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// Copyright 2019 The Chromium Authors. 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:dashcast/player.dart';
import 'package:dashcast/notifiers.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
final url = 'https://itsallwidgets.com/podcast/feed';
@override
Widget build(BuildContext context) {
return ChangeNotifierProvider(
builder: (_) => Podcast()..parse(url),
child: MaterialApp(
title: 'The Boring Show!',
home: MyPage(),
),
);
}
}
class MyPage extends StatefulWidget {
@override
_MyPageState createState() => _MyPageState();
}
class _MyPageState extends State<MyPage> {
var navIndex = 0;
final pages = List<Widget>.unmodifiable([
EpisodesPage(),
DummyPage(),
]);
final iconList = List<IconData>.unmodifiable([
// TODO why is there a hot tub?
Icons.hot_tub,
Icons.timelapse,
]);
@override
Widget build(BuildContext context) {
return Scaffold(
body: pages[navIndex],
bottomNavigationBar: MyNavBar(
icons: iconList,
onPressed: (i) => setState(() => navIndex = i),
activeIndex: navIndex,
),
);
}
}
class MyNavBar extends StatefulWidget {
const MyNavBar({
@required this.icons,
@required this.onPressed,
@required this.activeIndex,
}) : assert(icons != null);
final List<IconData> icons;
final Function(int) onPressed;
final int activeIndex;
@override
_MyNavBarState createState() => _MyNavBarState();
}
class _MyNavBarState extends State<MyNavBar> with TickerProviderStateMixin {
double beaconRadius;
double maxBeaconRadius = 20;
AnimationController _controller;
@override
void initState() {
super.initState();
beaconRadius = 0;
}
@override
void didUpdateWidget(MyNavBar oldWidget) {
super.didUpdateWidget(oldWidget);
print('${oldWidget.activeIndex}, ${widget.activeIndex}');
if (oldWidget.activeIndex != widget.activeIndex) {
_startAnimation();
}
}
void _startAnimation() {
_controller = AnimationController(
duration: Duration(milliseconds: 300),
vsync: this,
);
final _curve = CurvedAnimation(parent: _controller, curve: Curves.linear);
Tween<double>(begin: 0, end: 1).animate(_curve)
..addListener(() {
setState(() {
beaconRadius = maxBeaconRadius * _curve.value;
if (beaconRadius == maxBeaconRadius) {
beaconRadius = 0;
}
print('$beaconRadius, $maxBeaconRadius');
});
});
_controller.forward();
}
@override
Widget build(BuildContext context) {
return Container(
height: 50,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
for (var i = 0; i < widget.icons.length; i++)
CustomPaint(
painter: BeaconPainter(
beaconRadius: beaconRadius,
maxBeaconRadius: maxBeaconRadius,
),
child: GestureDetector(
child: Icon(widget.icons[i],
color: i == widget.activeIndex
? Colors.yellow[700]
: Colors.black54),
onTap: () => widget.onPressed(i),
))
],
),
);
}
}
class BeaconPainter extends CustomPainter {
final double beaconRadius;
final double maxBeaconRadius;
BeaconPainter({this.beaconRadius, this.maxBeaconRadius});
@override
void paint(Canvas canvas, Size size) {
if (beaconRadius == maxBeaconRadius) {
return;
}
double strokeWidth = beaconRadius < maxBeaconRadius * 0.5
? beaconRadius
: maxBeaconRadius - beaconRadius;
final paint = Paint()
..color = Colors.blue
..strokeWidth = strokeWidth;
canvas.drawCircle(Offset(10, 10), beaconRadius, paint);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => true;
}
class DummyPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Center(
child: const Text('Dummy Page'),
);
}
}
class EpisodesPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Consumer<Podcast>(
builder: (context, podcast, _) {
return podcast.feed != null
? EpisodeListView(rssFeed: podcast.feed)
: Center(
child: CircularProgressIndicator(),
);
},
);
}
}
class EpisodeListView extends StatelessWidget {
const EpisodeListView({
Key key,
@required this.rssFeed,
}) : super(key: key);
final EpisodeFeed rssFeed;
void downloadStatus(double num) => print('$num');
@override
Widget build(BuildContext context) {
return ListView(
children: rssFeed.items
.map(
(i) => ListTile(
title: Text(i.title),
subtitle: Text(
i.description,
maxLines: 3,
overflow: TextOverflow.ellipsis,
),
trailing: IconButton(
icon: Icon(Icons.arrow_downward),
onPressed: () {
i.download();
Scaffold.of(context).showSnackBar(
SnackBar(
content: Text('Downloading ${i.title}'),
),
);
}),
onTap: () {
Provider.of<Podcast>(context).selectedItem = i;
Navigator.of(context).push(
MaterialPageRoute(builder: (_) => PlayerPage()),
);
},
),
)
.toList(),
);
}
}