ruidy/bmi_calculator_app
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feat: result page

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This commit is contained in:
Ruidy 2021-07-04 00:27:12 +02:00
parent 533f410bfc
commit 43868f7d93
5 changed files with 153 additions and 26 deletions
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10
.vscode/settings.json vendored Normal file
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@ -0,0 +1,10 @@
{
"spellright.language": [
"en"
],
"spellright.documentTypes": [
"markdown",
"latex",
"plaintext"
]
}

4
README.md
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@ -11,7 +11,9 @@ Compute and track your Body Mass Index and Body Fat Percentage
- [ ] bmi over 40 : red - morbid obesity
- [ ] bmi tracker: date, value, graph
- [ ] profile: save age, height, genre, local storage
- [ ] bmi on second screen
- [x] bmi on second screen
- [ ] feedback on genre select
* [doc](https://www.santepratique.fr/nutrition/calcul-imc)
- [design inspiration](https://dribbble.com/shots/13913052-DailyUI-004-Calculator)

109
lib/calculator.dart
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@ -1,22 +1,32 @@
import 'package:flutter/material.dart';
import 'result.dart';
class CalculatorPage extends StatefulWidget {
CalculatorPage({Key? key}) : super(key: key);
final String title = 'BMI Calculator';
static const routeName = '/';
@override
_CalculatorPageState createState() => _CalculatorPageState();
}
class _CalculatorPageState extends State<CalculatorPage> {
int _counter = 0;
double _weight = 60;
double _height = 165;
double _age = 18;
int _gender = 0; // male = 1; female = 0
void _incrementCounter() {
setState(() {
_counter++;
});
@override
void initState() {
super.initState();
}
int bodyMassIndex() => ((_weight / (_height * _height)) * 10000).round();
int bodyFatPercentage() =>
(1.2 * bodyMassIndex() + .23 * _age - 10.8 * _gender - 5.4).round();
@override
Widget build(BuildContext context) => Scaffold(
appBar: AppBar(
@ -24,22 +34,89 @@ class _CalculatorPageState extends State<CalculatorPage> {
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Text(
'You have pushed the button this many times:',
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Expanded(
child: Ink(
decoration: const ShapeDecoration(
color: Colors.lightGreen,
shape: CircleBorder(),
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
child: IconButton(
icon: const Icon(Icons.female),
tooltip: 'Choose female gender',
onPressed: () {
setState(() => _gender = 0);
},
color: Colors.white,
),
),
),
Expanded(
child: Ink(
decoration: const ShapeDecoration(
color: Colors.lightGreen,
shape: CircleBorder(),
),
child: IconButton(
icon: const Icon(Icons.male),
tooltip: 'Choose male gender',
onPressed: () {
setState(() => _gender = 1);
},
color: Colors.white,
),
),
),
],
),
Text('Weight'),
Text("${_weight.round().toString()} kg"),
Slider(
value: _weight,
min: 0,
max: 100,
divisions: 100,
label: _weight.round().toString(),
onChanged: (double value) => setState(() => _weight = value),
),
Text('Height'),
Text("${_height.round().toString()} cm"),
Slider(
value: _height,
min: 100,
max: 200,
divisions: 100,
label: _height.round().toString(),
onChanged: (double value) => setState(() => _height = value),
),
Text('Age'),
Text("${_age.round().toString()} years old"),
Slider(
value: _age,
min: 10,
max: 100,
divisions: 100,
label: _age.round().toString(),
onChanged: (double value) => setState(() => _age = value),
),
ElevatedButton(
onPressed: () {
print(
"BMI: ${bodyMassIndex()}; BFP: ${bodyFatPercentage()}");
Navigator.pushNamed(
context,
ResultPage.routeName,
arguments: Results(bodyMassIndex(), bodyFatPercentage()),
);
},
child: Text('Calculate'),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}

13
lib/main.dart
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@ -1,6 +1,7 @@
import 'package:flutter/material.dart';
import 'calculator.dart';
import 'result.dart';
void main() => runApp(BMIApp());
@ -8,11 +9,11 @@ class BMIApp extends StatelessWidget {
@override
Widget build(BuildContext context) => MaterialApp(
title: 'BMI/BFP Calculator',
theme: ThemeData(
primarySwatch: Colors.green,
),
home: CalculatorPage(),
theme: ThemeData(primarySwatch: Colors.green),
initialRoute: '/',
routes: {
CalculatorPage.routeName: (context) => CalculatorPage(),
ResultPage.routeName: (context) => ResultPage(),
},
);
}

37
lib/result.dart Normal file
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@ -0,0 +1,37 @@
import 'package:flutter/material.dart';
class Results {
int bodyMassIndex;
int bodyFatPercentage;
Results(this.bodyMassIndex, this.bodyFatPercentage);
}
class ResultPage extends StatelessWidget {
static const routeName = '/results';
@override
Widget build(BuildContext context) {
final results = ModalRoute.of(context)!.settings.arguments as Results;
return Scaffold(
appBar: AppBar(
title: Text("Your results"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
"Your results: BMI: ${results.bodyMassIndex}; BFP: ${results.bodyFatPercentage}"),
ElevatedButton(
onPressed: () {
Navigator.pop(context);
},
child: Text('Go back!'),
),
],
)),
);
}
}