time-progress-tracker/time_progress_tracker
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Added code in lib/main.dart from prototype

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Signed-off-by: Andreas Fahrecker <AndreasFahrecker@gmail.com>
This commit is contained in:
Andreas Fahrecker
2020-10-08 11:43:31 +02:00
parent d30b1031b5
commit 254e59f84e
1 changed files with 152 additions and 66 deletions
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218
lib/main.dart
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@ -1,4 +1,7 @@
import 'package:flutter/material.dart';
import 'package:percent_indicator/circular_percent_indicator.dart';
import 'package:percent_indicator/linear_percent_indicator.dart';
import 'package:shared_preferences/shared_preferences.dart';
void main() {
runApp(MyApp());
@ -9,24 +12,12 @@ class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
title: 'Time Progress Calculator',
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
// This makes the visual density adapt to the platform that you run
// the app on. For desktop platforms, the controls will be smaller and
// closer together (more dense) than on mobile platforms.
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
home: MyHomePage(title: 'Time Progress Calculator'),
);
}
}
@ -34,15 +25,6 @@ class MyApp extends StatelessWidget {
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
@ -50,68 +32,172 @@ class MyHomePage extends StatefulWidget {
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
final String _startDateKey = "startDate";
final String _endDateKey = "endDate";
DateTime startDate = DateTime(2000);
DateTime endDate = DateTime(2100);
void _incrementCounter() {
void _retrieveDates() async {
final SharedPreferences prefs = await SharedPreferences.getInstance();
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
startDate = DateTime.fromMillisecondsSinceEpoch(
prefs.getInt(_startDateKey) ?? DateTime(2000).millisecondsSinceEpoch);
endDate = DateTime.fromMillisecondsSinceEpoch(
prefs.getInt(_endDateKey) ?? DateTime(2100).millisecondsSinceEpoch);
});
}
void _selectStartDate(BuildContext context) async {
final DateTime picked = await showDatePicker(
context: context,
initialDate: startDate,
firstDate: DateTime(2000),
lastDate: DateTime(2100));
if (picked != null && picked != startDate) {
final SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setInt(_startDateKey, picked.millisecondsSinceEpoch);
setState(() {
startDate = picked;
});
}
}
void _selectEndDate(BuildContext context) async {
final DateTime picked = await showDatePicker(
context: context,
initialDate: endDate,
firstDate: DateTime(2000),
lastDate: DateTime(2100));
if (picked != null && picked != endDate) {
final SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setInt(_endDateKey, picked.millisecondsSinceEpoch);
setState(() {
endDate = picked;
});
}
}
int _getAmountOfDaysDone() {
return DateTime.now().difference(startDate).inDays;
}
int _getAmountOfDaysLeft() {
return endDate.difference(DateTime.now()).inDays;
}
int _getAmountOfAllDays() {
return endDate.difference(startDate).inDays;
}
double _getPercent() {
final int wholeDuration = _getAmountOfAllDays();
final int currentDuration = _getAmountOfDaysDone();
final double onePercent = wholeDuration / 100;
return currentDuration / onePercent / 100;
}
@override
void initState() {
super.initState();
_retrieveDates();
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
body: Container(
margin: const EdgeInsets.all(5.0),
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
Expanded(
flex: 1,
child: Row(
children: <Widget>[
Expanded(
flex: 2,
child: Text(
"Start Date:",
textAlign: TextAlign.right,
),
),
Expanded(
flex: 2,
child: Text("${startDate.toLocal()}".split(" ")[0]),
),
Expanded(
flex: 2,
child: RaisedButton(
onPressed: () => _selectStartDate(context),
child: Text("Change"),
color: Colors.lightBlueAccent,
),
),
Spacer(flex: 1)
],
),
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
Expanded(
flex: 1,
child: Row(
children: <Widget>[
Expanded(
flex: 2,
child: Text(
"End Date:",
textAlign: TextAlign.right,
),
),
Expanded(
flex: 2,
child: Text("${endDate.toLocal()}".split(" ")[0]),
),
Expanded(
flex: 2,
child: RaisedButton(
onPressed: () => _selectEndDate(context),
child: Text("Change"),
color: Colors.lightBlueAccent,
),
),
Spacer(flex: 1)
],
),
),
Expanded(
flex: 5,
child: CircularPercentIndicator(
radius: 100,
lineWidth: 10,
percent: _getPercent(),
progressColor: Colors.green,
backgroundColor: Colors.red,
center: Text("${(_getPercent() * 100).floor()} %"),
),
),
Expanded(
flex: 1,
child: LinearPercentIndicator(
padding: EdgeInsets.symmetric(horizontal: 15.0),
percent: _getPercent(),
leading: Text("${_getAmountOfDaysDone()} Days"),
center: Text("${(_getPercent() * 100).floor()} %"),
trailing: Text("${_getAmountOfDaysLeft()} Days"),
progressColor: Colors.green,
backgroundColor: Colors.red,
lineHeight: 25,
),
),
Expanded(
flex: 1,
child: Text("${_getAmountOfAllDays()} Days"),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}