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// Copyright 2014 The Flutter 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:flutter/material.dart';
import 'stock_arrow.dart';
import 'stock_data.dart';
class _StockSymbolView extends StatelessWidget {
const _StockSymbolView({ this.stock, this.arrow });
final Stock stock;
final Widget arrow;
@override
Widget build(BuildContext context) {
assert(stock != null);
final String lastSale = '\$${stock.lastSale.toStringAsFixed(2)}';
String changeInPrice = '${stock.percentChange.toStringAsFixed(2)}%';
if (stock.percentChange > 0)
changeInPrice = '+' + changeInPrice;
final TextStyle headings = Theme.of(context).textTheme.bodyText1;
return Container(
padding: const EdgeInsets.all(20.0),
child: Column(
children: <Widget>[
Row(
children: <Widget>[
Text(
stock.symbol,
key: ValueKey<String>('${stock.symbol}_symbol_name'),
style: Theme.of(context).textTheme.headline3,
),
arrow,
],
mainAxisAlignment: MainAxisAlignment.spaceBetween,
),
Text('Last Sale', style: headings),
Text('$lastSale ($changeInPrice)'),
Container(
height: 8.0
),
Text('Market Cap', style: headings),
Text(stock.marketCap),
Container(
height: 8.0
),
RichText(
text: TextSpan(
style: DefaultTextStyle.of(context).style.merge(const TextStyle(fontSize: 8.0)),
text: 'Prices may be delayed by ',
children: const <TextSpan>[
TextSpan(text: 'several', style: TextStyle(fontStyle: FontStyle.italic)),
TextSpan(text: ' years.'),
],
),
),
],
mainAxisSize: MainAxisSize.min,
),
);
}
}
class StockSymbolPage extends StatelessWidget {
const StockSymbolPage({ this.symbol, this.stocks });
final String symbol;
final StockData stocks;
@override
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: stocks,
builder: (BuildContext context, Widget child) {
final Stock stock = stocks[symbol];
return Scaffold(
appBar: AppBar(
title: Text(stock?.name ?? symbol),
),
body: SingleChildScrollView(
child: Container(
margin: const EdgeInsets.all(20.0),
child: Card(
child: AnimatedCrossFade(
duration: const Duration(milliseconds: 300),
firstChild: const Padding(
padding: EdgeInsets.all(20.0),
child: Center(child: CircularProgressIndicator()),
),
secondChild: stock != null
? _StockSymbolView(
stock: stock,
arrow: Hero(
tag: stock,
child: StockArrow(percentChange: stock.percentChange),
),
) : Padding(
padding: const EdgeInsets.all(20.0),
child: Center(child: Text('$symbol not found')),
),
crossFadeState: stock == null && stocks.loading ? CrossFadeState.showFirst : CrossFadeState.showSecond,
),
),
),
),
);
},
);
}
}
class StockSymbolBottomSheet extends StatelessWidget {
const StockSymbolBottomSheet({ this.stock });
final Stock stock;
@override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.all(10.0),
decoration: const BoxDecoration(
border: Border(top: BorderSide(color: Colors.black26))
),
child: _StockSymbolView(
stock: stock,
arrow: StockArrow(percentChange: stock.percentChange),
),
);
}
}