150 lines
5.2 KiB
Dart
150 lines
5.2 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'result_model.dart';
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void main() => runApp(const MyApp());
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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@override
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Widget build(BuildContext context) {
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return MultiProvider(
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providers: [
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ChangeNotifierProvider.value(
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value: ResultModel(),
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),
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],
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child: MaterialApp(
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title: 'Energy',
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home: MyCustomFormState(title: 'Energy'),
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));
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}
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}
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class MyCustomFormState extends StatelessWidget with InputValidationMixin {
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final String title;
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MyCustomFormState({required this.title});
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final formGlobalKey = GlobalKey<FormState>();
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final _controllerStartHeight = TextEditingController();
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final _controllerEndHeight = TextEditingController();
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final _controllerStartSpeed = TextEditingController();
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final _controllerEndSpeed = TextEditingController();
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final _controllerWeight = TextEditingController();
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void _changeJoule(BuildContext context) {
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Provider.of<ResultModel>(context, listen: false).changeJoule(
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double.parse(_controllerWeight.text),
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double.parse(_controllerStartSpeed.text),
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double.parse(_controllerEndSpeed.text),
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double.parse(_controllerStartHeight.text),
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double.parse(_controllerEndHeight.text),
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);
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}
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@override
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Widget build(BuildContext context) {
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double _joule = Provider.of<ResultModel>(context).getJoule;
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String _energyWater = Provider.of<ResultModel>(context).getWater;
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String _energyIron = Provider.of<ResultModel>(context).getIron;
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return Scaffold(
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appBar: AppBar(
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title: Text(title),
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),
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body: Form(
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key: formGlobalKey,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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TextFormField(
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controller: _controllerStartHeight,
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decoration: const InputDecoration(
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labelText: 'Start height',
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hintText: 'Enter the height at the start (in meters)'),
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validator: (value) {
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if (isInputValid(value.toString())) {
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return 'Please enter a floating point number';
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}
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},
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),
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TextFormField(
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controller: _controllerEndHeight,
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decoration: const InputDecoration(
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labelText: 'End height',
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hintText: 'Enter the height at the end (in meters)'),
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validator: (value) {
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if (isInputValid(value.toString())) {
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return 'Please enter a floating point number';
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}
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},
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),
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TextFormField(
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controller: _controllerStartSpeed,
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decoration: const InputDecoration(
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labelText: 'Start speed',
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hintText: 'Enter the speed at the end (in m/s)'),
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validator: (value) {
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if (isInputValid(value.toString())) {
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return 'Please enter a floating point number';
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}
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},
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),
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TextFormField(
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controller: _controllerEndSpeed,
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decoration: const InputDecoration(
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labelText: 'End speed',
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hintText: 'Enter the speed at the end (in m/s)'),
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validator: (value) {
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if (isInputValid(value.toString())) {
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return 'Please enter a floating point number';
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}
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},
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),
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TextFormField(
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controller: _controllerWeight,
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decoration: const InputDecoration(
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labelText: 'Weight',
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hintText: 'Enter the weight of the object (in kg)'),
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validator: (value) {
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if (isInputValid(value.toString())) {
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return 'Please enter a floating point number';
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}
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},
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),
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FittedBox(
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child: Text(
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'$_joule Joule \n'
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'$_energyWater Liter Wasser können damit erhitzt werden \n'
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'$_energyIron kg Eisen können damit zu glühen gebracht werden',
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style: new TextStyle(
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fontSize: 20.0,
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color: Colors.black,
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))),
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Padding(
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padding: const EdgeInsets.symmetric(vertical: 16.0),
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child: ElevatedButton(
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onPressed: () => {
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if (formGlobalKey.currentState!.validate())
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{formGlobalKey.currentState!.save()},
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_changeJoule(context),
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},
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child: Text('Submit',
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style: new TextStyle(
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fontSize: 20.0,
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)),
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),
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),
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],
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),
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));
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}
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}
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mixin InputValidationMixin {
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bool isInputValid(String value) =>
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!new RegExp(r'[0-9]+.?[0-9]*').hasMatch(value);
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}
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