release 1
This commit is contained in:
255
lib/main.dart
255
lib/main.dart
@@ -1,122 +1,209 @@
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import 'package:flutter/material.dart';
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void main() {
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runApp(const MyApp());
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runApp(const SupermarketCalcApp());
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}
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class MyApp extends StatelessWidget {
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const MyApp({super.key});
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class SupermarketCalcApp extends StatelessWidget {
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const SupermarketCalcApp({super.key});
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// This widget is the root of your application.
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'Flutter Demo',
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title: 'Calc Margen',
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debugShowCheckedModeBanner: false,
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// Configuración Material You (M3)
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theme: ThemeData(
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// This is the theme of your application.
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//
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// TRY THIS: Try running your application with "flutter run". You'll see
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// the application has a purple toolbar. Then, without quitting the app,
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// try changing the seedColor in the colorScheme below to Colors.green
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// and then invoke "hot reload" (save your changes or press the "hot
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// reload" button in a Flutter-supported IDE, or press "r" if you used
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// the command line to start the app).
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//
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// Notice that the counter didn't reset back to zero; the application
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// state is not lost during the reload. To reset the state, use hot
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// restart instead.
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//
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// This works for code too, not just values: Most code changes can be
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// tested with just a hot reload.
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colorScheme: .fromSeed(seedColor: Colors.deepPurple),
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useMaterial3: true,
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colorScheme: ColorScheme.fromSeed(
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seedColor: Colors.red,
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brightness: Brightness.light,
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),
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),
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home: const MyHomePage(title: 'Flutter Demo Home Page'),
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home: const HomePage(),
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);
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}
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}
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class MyHomePage extends StatefulWidget {
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const MyHomePage({super.key, required this.title});
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// This widget is the home page of your application. It is stateful, meaning
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// that it has a State object (defined below) that contains fields that affect
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// how it looks.
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// This class is the configuration for the state. It holds the values (in this
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// case the title) provided by the parent (in this case the App widget) and
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// used by the build method of the State. Fields in a Widget subclass are
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// always marked "final".
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final String title;
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class HomePage extends StatefulWidget {
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const HomePage({super.key});
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@override
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State<MyHomePage> createState() => _MyHomePageState();
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State<HomePage> createState() => _HomePageState();
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}
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class _MyHomePageState extends State<MyHomePage> {
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int _counter = 0;
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class _HomePageState extends State<HomePage> {
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final _costController = TextEditingController(text: "1.50");
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final _marginController = TextEditingController(text: "40");
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double _exactPrice = 2.10;
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double _profit = 0.60;
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String _suggestedPrice = "2.50 €";
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@override
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void initState() {
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super.initState();
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_calculate();
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}
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void _calculate() {
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final double cost = double.tryParse(_costController.text) ?? 0;
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final double marginPercent = double.tryParse(_marginController.text) ?? 0;
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if (cost <= 0 || marginPercent <= 0) {
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setState(() {
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_suggestedPrice = "---";
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});
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return;
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}
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_profit = cost * (marginPercent / 100);
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_exactPrice = cost + _profit;
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// Lógica de Redondeo Psicológico (.50, .95, .99)
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int floorPrice = _exactPrice.floor();
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double finalVal;
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if (_exactPrice <= 1) {
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finalVal = (_exactPrice < 0.50) ? 0.99 : (_exactPrice.ceil() - 0.01);
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} else {
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if (_exactPrice <= floorPrice + 0.50) {
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finalVal = floorPrice + 0.50;
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} else if (_exactPrice <= floorPrice + 0.95) {
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finalVal = floorPrice + 0.95;
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} else {
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finalVal = floorPrice + 0.99;
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}
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if (finalVal < _exactPrice) {
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finalVal = _exactPrice.ceil() + 0.99;
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}
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}
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void _incrementCounter() {
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setState(() {
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// This call to setState tells the Flutter framework that something has
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// changed in this State, which causes it to rerun the build method below
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// so that the display can reflect the updated values. If we changed
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// _counter without calling setState(), then the build method would not be
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// called again, and so nothing would appear to happen.
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_counter++;
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_suggestedPrice = "${finalVal.toStringAsFixed(2)} €";
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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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// This method is rerun every time setState is called, for instance as done
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// by the _incrementCounter method above.
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//
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// The Flutter framework has been optimized to make rerunning build methods
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// fast, so that you can just rebuild anything that needs updating rather
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// than having to individually change instances of widgets.
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final colors = Theme.of(context).colorScheme;
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return Scaffold(
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backgroundColor: colors.surface,
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appBar: AppBar(
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// TRY THIS: Try changing the color here to a specific color (to
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// Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
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// change color while the other colors stay the same.
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backgroundColor: Theme.of(context).colorScheme.inversePrimary,
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// Here we take the value from the MyHomePage object that was created by
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// the App.build method, and use it to set our appbar title.
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title: Text(widget.title),
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title: const Text("Calculadora de Margen"),
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centerTitle: true,
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backgroundColor: colors.surface,
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elevation: 0,
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),
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body: Center(
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// Center is a layout widget. It takes a single child and positions it
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// in the middle of the parent.
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body: SingleChildScrollView(
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padding: const EdgeInsets.all(24.0),
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child: Column(
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// Column is also a layout widget. It takes a list of children and
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// arranges them vertically. By default, it sizes itself to fit its
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// children horizontally, and tries to be as tall as its parent.
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//
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// Column has various properties to control how it sizes itself and
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// how it positions its children. Here we use mainAxisAlignment to
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// center the children vertically; the main axis here is the vertical
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// axis because Columns are vertical (the cross axis would be
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// horizontal).
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//
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// TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
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// action in the IDE, or press "p" in the console), to see the
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// wireframe for each widget.
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mainAxisAlignment: .center,
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children: [
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const Text('You have pushed the button this many times:'),
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Text(
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'$_counter',
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style: Theme.of(context).textTheme.headlineMedium,
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// Card de entrada de datos
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Card(
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elevation: 0,
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color: colors.surfaceContainerHighest.withOpacity(0.3),
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
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child: Padding(
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padding: const EdgeInsets.all(20.0),
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child: Column(
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children: [
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TextField(
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controller: _costController,
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keyboardType: const TextInputType.numberWithOptions(decimal: true),
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onChanged: (_) => _calculate(),
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decoration: InputDecoration(
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labelText: "Costo Base",
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prefixText: "€ ",
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border: OutlineInputBorder(borderRadius: BorderRadius.circular(16)),
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filled: true,
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fillColor: colors.surface,
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),
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),
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const SizedBox(height: 16),
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TextField(
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controller: _marginController,
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keyboardType: TextInputType.number,
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onChanged: (_) => _calculate(),
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decoration: InputDecoration(
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labelText: "Margen Deseado",
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suffixText: "%",
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border: OutlineInputBorder(borderRadius: BorderRadius.circular(16)),
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filled: true,
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fillColor: colors.surface,
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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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const SizedBox(height: 24),
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// Resultados Intermedios
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Row(
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children: [
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_buildInfoTile("Precio Exacto", "${_exactPrice.toStringAsFixed(2)} €", colors),
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const SizedBox(width: 12),
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_buildInfoTile("Ganancia", "${_profit.toStringAsFixed(2)} €", colors),
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],
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),
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const SizedBox(height: 24),
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// Card de Resultado Final (Material You Hero)
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Container(
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width: double.infinity,
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padding: const EdgeInsets.symmetric(vertical: 32, horizontal: 16),
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decoration: BoxDecoration(
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color: colors.primaryContainer,
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borderRadius: BorderRadius.circular(28),
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),
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child: Column(
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children: [
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Text(
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"PRECIO SUGERIDO",
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style: TextStyle(
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color: colors.onPrimaryContainer,
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fontWeight: FontWeight.w900,
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letterSpacing: 1.2,
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),
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),
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const SizedBox(height: 8),
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Text(
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_suggestedPrice,
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style: TextStyle(
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fontSize: 56,
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fontWeight: FontWeight.bold,
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color: colors.onPrimaryContainer,
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),
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),
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Icon(Icons.auto_awesome, color: colors.primary, size: 30),
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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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floatingActionButton: FloatingActionButton(
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onPressed: _incrementCounter,
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tooltip: 'Increment',
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child: const Icon(Icons.add),
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);
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}
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Widget _buildInfoTile(String label, String value, ColorScheme colors) {
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return Expanded(
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child: Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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border: Border.all(color: colors.outlineVariant),
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borderRadius: BorderRadius.circular(20),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(label, style: TextStyle(fontSize: 12, color: colors.secondary)),
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Text(value, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold)),
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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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