class Editor extends StatelessWidget { @override Widget build(BuildContext context) { return Padding( padding: const EdgeInsets.all(16.0), child: TextField( controller: _controladorCampoNumeroConta, style: TextStyle( fontSize: 24.0, ), decoration: InputDecoration( labelText: 'Número da conta', hintText: '0000' ), keyboardType: TextInputType.number, ), ); } }