diff --git a/lib/login.dart b/lib/login.dart new file mode 100644 index 0000000..80f2e88 --- /dev/null +++ b/lib/login.dart @@ -0,0 +1,64 @@ +import 'package:flutter/material.dart'; + +class PantallaInicioSesion extends StatefulWidget { + @override + _PantallaInicioSesionState createState() => _PantallaInicioSesionState(); +} + +class _PantallaInicioSesionState extends State { + final _formKey = GlobalKey(); + final TextEditingController _usuarioController = TextEditingController(); + final TextEditingController _contrasenaController = TextEditingController(); + + void _iniciarSesion() { + if (_formKey.currentState!.validate()) { + Navigator.pushReplacementNamed(context, '/categorias'); + } + } + + @override + Widget build(BuildContext context) { + return Scaffold( + appBar: AppBar( + title: Text('Inicio de Sesión'), + ), + body: Padding( + padding: EdgeInsets.all(16.0), + child: Form( + key: _formKey, + child: Column( + mainAxisAlignment: MainAxisAlignment.center, + children: [ + TextFormField( + controller: _usuarioController, + decoration: InputDecoration(labelText: 'Usuario'), + validator: (value) { + if (value!.isEmpty) { + return 'Por favor ingrese su usuario'; + } + return null; + }, + ), + TextFormField( + controller: _contrasenaController, + decoration: InputDecoration(labelText: 'Contraseña'), + obscureText: true, + validator: (value) { + if (value!.isEmpty) { + return 'Por favor ingrese su contraseña'; + } + return null; + }, + ), + SizedBox(height: 20), + ElevatedButton( + onPressed: _iniciarSesion, + child: Text('Iniciar Sesión'), + ), + ], + ), + ), + ), + ); + } +} diff --git a/lib/main.dart b/lib/main.dart index 8e94089..d2391df 100644 --- a/lib/main.dart +++ b/lib/main.dart @@ -1,5 +1,8 @@ import 'package:flutter/material.dart'; +import 'login.dart'; + + void main() { runApp(const MyApp()); } @@ -7,119 +10,37 @@ void main() { class MyApp extends StatelessWidget { const MyApp({super.key}); - // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( - // This is the theme of your application. - // - // TRY THIS: Try running your application with "flutter run". You'll see - // the application has a purple toolbar. Then, without quitting the app, - // try changing the seedColor in the colorScheme below to Colors.green - // and then invoke "hot reload" (save your changes or press the "hot - // reload" button in a Flutter-supported IDE, or press "r" if you used - // the command line to start the app). - // - // Notice that the counter didn't reset back to zero; the application - // state is not lost during the reload. To reset the state, use hot - // restart instead. - // - // This works for code too, not just values: Most code changes can be - // tested with just a hot reload. colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple), useMaterial3: true, ), - home: const MyHomePage(title: 'Flutter Demo Home Page'), + initialRoute: '/', + routes: { + '/': (context) => PantallaInicioSesion(), + '/categorias': (context) => CategoriasListScreen(), + }, ); } } -class MyHomePage extends StatefulWidget { - const MyHomePage({super.key, required this.title}); - - // 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 - State createState() => _MyHomePageState(); -} - -class _MyHomePageState extends State { - int _counter = 0; - - void _incrementCounter() { - 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++; - }); - } +// Aquí va tu CategoriasListScreen para la pantalla de categorías. +// Crea un archivo llamado categorias_list_screen.dart en la carpeta lib/screens +// y define la pantalla de categorías. Aquí tienes un ejemplo básico: +class CategoriasListScreen extends StatelessWidget { @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( - // TRY THIS: Try changing the color here to a specific color (to - // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar - // change color while the other colors stay the same. - backgroundColor: Theme.of(context).colorScheme.inversePrimary, - // 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), + title: Text('Categorias'), ), body: Center( - // Center is a layout widget. It takes a single child and positions it - // in the middle of the parent. - 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. - // - // 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). - // - // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint" - // action in the IDE, or press "p" in the console), to see the - // wireframe for each widget. - mainAxisAlignment: MainAxisAlignment.center, - children: [ - const Text( - 'You have pushed the button this many times:', - ), - Text( - '$_counter', - style: Theme.of(context).textTheme.headlineMedium, - ), - ], - ), + child: Text('Lista de Categorías'), ), - floatingActionButton: FloatingActionButton( - onPressed: _incrementCounter, - tooltip: 'Increment', - child: const Icon(Icons.add), - ), // This trailing comma makes auto-formatting nicer for build methods. ); } }