i want to resize the text of a TextField() widget in order to fit the max width of its Expanded() parent, this width is determined by flex: 10 as you can see in the code.
However, i do not know how can i achieve this result. I also tried the 
Edit. I updated the code so that is clear what i am trying to do.
I have a list of transactions. When the user click on a transaction a dialog will popup in order to let the user edit the info he has provided.
This is the code which call the dialog, the dialog is ModificaTransazione().
Material(
color: Colors.white,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
child: InkWell(
borderRadius: BorderRadius.circular(10),
onTap: () {
//sleep(Duration(milliseconds: 800));
showDialog(
context: context,
builder: (context) {
return Dialog(
insetPadding: EdgeInsets.only(
bottom: 0.0), //QUESTO TOGLIE SPAZIO DALLA TASTIERA
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(40)),
elevation: 16,
child: ModificaTransazione(
idtransazione: tx.id,
titolotransazione: tx.titolo,
importotransazione: tx.costo,
datatransazione: tx.data,
indicetransazione: tx.indicecategoria,
notatransazione: tx.nota,
listatransazioni: widget.transactions,
eliminatransazione: widget.deleteTx,
listanomicategorie: widget.listanomicategorie,
refreshSezioneFinanziaria:
widget.refreshFinanceScreen,
size: size),
);
},
).then((_) {
setState(() {});
});
},
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
),
child: SizedBox(
height: size.height * 0.10,
// color: Colors.red,
child: Row(
children: [
Expanded(
flex: 4,
child: Container(
margin: const EdgeInsets.only(left: 15),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.center,
children: [
FittedBox(
child: Text(
tx.titolo,
style: const TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
),
FittedBox(
child: Text(
DateFormat('dd MMMM, yyyy', 'it')
.format(tx.data),
style: const TextStyle(
color: Colors.grey,
),
),
),
],
),
),
),
Expanded(
flex: 5,
child: Container(
alignment: Alignment.centerRight,
margin: const EdgeInsets.symmetric(horizontal: 15),
child: FittedBox(
child: Text(
'- ${ciframostrata(tx.costo)} €',
style: const TextStyle(
fontWeight: FontWeight.bold,
fontSize: 20,
color: Color(0xFF7465fc)),
),
),
),
),
],
),
),
),
),
),
This is "ModificaTransazione()" literally "Edit Transaction" in Italian.
import 'package:auto_size_text/auto_size_text.dart';
import 'package:flutter/material.dart';
import 'package:flutter_application_1/models/transaction.dart';
import 'package:flutter_application_1/widget/transactions_list.dart';
import 'package:intl/intl.dart';
import 'package:auto_size_text_field/auto_size_text_field.dart';
class ModificaTransazione extends StatefulWidget {
ModificaTransazione({
Key? key,
required this.size,
required this.idtransazione,
required this.titolotransazione,
required this.importotransazione,
required this.datatransazione,
required this.indicetransazione,
required this.notatransazione,
required this.listatransazioni,
required this.eliminatransazione,
required this.listanomicategorie,
required this.refreshSezioneFinanziaria,
}) : super(key: key);
final Size size;
final String idtransazione;
String titolotransazione;
double importotransazione;
DateTime datatransazione;
int indicetransazione;
String notatransazione;
List<String> listanomicategorie;
List<Transaction> listatransazioni;
final Function eliminatransazione;
final Function refreshSezioneFinanziaria;
@override
State<ModificaTransazione> createState() => _ModificaTransazioneState();
}
class _ModificaTransazioneState extends State<ModificaTransazione> {
var _notaController = TextEditingController();
var _importoController = TextEditingController();
var _titoloController = TextEditingController();
@override
void initState() {
super.initState();
if (widget.notatransazione != "") {
_notaController = TextEditingController(text: widget.notatransazione);
} else {
_notaController = TextEditingController(text: "Aggiungi");
}
_importoController = TextEditingController(
text: "${ciframostrata(widget.importotransazione)}");
_titoloController = TextEditingController(text: widget.titolotransazione);
}
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
child: Container(
width: widget.size.width * 0.8,
height: widget.size.height * 0.60,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(10),
),
child: Padding(
padding:
const EdgeInsets.only(top: 30, left: 30, right: 30, bottom: 30),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Row(
children: [
GestureDetector(
onTap: () {
setState(() {
Navigator.of(context).pop();
});
},
child: Icon(
Icons.cancel,
color: Colors.black,
),
),
Spacer(),
Expanded(
//
// THIS IS WHAT I WANT TO RESIZE, BUT FITTEDBOX IS CAUSING RENDERBOX IS NOT LAID OUT
//
flex: 10,
child: FittedBox(
fit: BoxFit.fitWidth,
child: TextField(
maxLines: 1,
decoration: InputDecoration(
border: InputBorder.none,
),
controller: _titoloController,
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
onSubmitted: (_) => salvaModifica(),
),
),
),
Spacer(),
GestureDetector(
child: Icon(
Icons.delete_outline_rounded,
color: Colors.black,
),
onTap: () {
print("Transazione Eliminata");
widget.eliminatransazione(widget.idtransazione);
Navigator.of(context).pop();
}),
],
),
Container(
padding: EdgeInsets.all(15),
alignment: Alignment.center,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15),
color: Theme.of(context).primaryColor.withOpacity(0.1),
),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Flexible(
flex: 4,
child: TextField(
decoration: InputDecoration(
border: InputBorder.none,
),
controller: _importoController,
keyboardType: const TextInputType.numberWithOptions(
decimal: true),
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 60,
color: Theme.of(context).primaryColor,
),
onSubmitted: (_) => salvaModifica(),
),
),
Flexible(
//color: Colors.red,
//alignment: Alignment.centerRight,
//width: widget.size.width * 0.10,
// color: Colors.red,
child: Text(
"€",
style: TextStyle(
fontSize: 40,
color:
Theme.of(context).primaryColor.withOpacity(0.8),
),
),
),
],
),
),
// AutoSizeText(
// "${ciframostrata(widget.importotransazione)} €",
// maxLines: 1,
// style: TextStyle(
// fontSize: 70,
// color: Theme.of(context).primaryColor,
// ),
// ),
// ),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
"Categoria",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
color: Colors.grey,
),
),
Container(
child: Row(
children: [
GestureDetector(
child: Text(
"${funzioneCategoria(indicenuovo ?? widget.indicetransazione, widget.listanomicategorie)[2]} ",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
color: funzioneCategoria(
indicenuovo ?? widget.indicetransazione,
widget.listanomicategorie)[1]),
),
onTap: _askedToLead,
),
Icon(
funzioneCategoria(
indicenuovo ?? widget.indicetransazione,
widget.listanomicategorie)[0],
color: funzioneCategoria(
indicenuovo ?? widget.indicetransazione,
widget.listanomicategorie)[1]),
],
),
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
"Data",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
color: Colors.grey,
),
),
InkWell(
// borderRadius: BorderRadius.circular(10),
onTap: _presentDatePicker,
child: Text(
DateFormat('dd MMMM, yyyy', 'it')
.format(_selectedDate ?? widget.datatransazione),
style: TextStyle(
color: Colors.black, //Theme.of(context).primaryColor,
fontWeight: FontWeight.bold,
),
),
),
],
),
Container(
//color: Colors.red,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: Text(
"Nota",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
color: Colors.grey,
),
),
),
Expanded(
child: (_notaController.text != "Aggiungi")
? TextField(
textAlign: TextAlign.end,
decoration: InputDecoration(
border: InputBorder.none,
),
controller: _notaController,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.black,
),
onSubmitted: (_) => salvaModifica(),
)
: TextField(
textAlign: TextAlign.end,
decoration: InputDecoration(
border: InputBorder.none,
),
controller: _notaController,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.grey[600],
),
onSubmitted: (_) => salvaModifica(),
)),
],
),
),
modificato == true
? TextButton(
child: Text("Salva"),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(
Theme.of(context).primaryColor),
foregroundColor:
MaterialStateProperty.all(Colors.white),
),
onPressed: () {
premuto = true;
salvaModifica();
},
)
: SizedBox(),
],
),
),
),
);
}
CodePudding user response：
You can use the FittedBox widget to dynamically change text size based on width or height.
FittedBox(
fit: BoxFit.fitWidth,
child: TextField(
maxLines: 1,
decoration: InputDecoration(
border: InputBorder.none,
),
controller: _titoloController,
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
onSubmitted: (_) => salvaModifica(),
)),
The text will be resized based on the width of Expanded.
CodePudding user response：
I have checked your code. You can do the following:
Row(
mainAxisSize: MainAxisSize.min,
children: [
GestureDetector(
onTap: () {
setState(() {
Navigator.of(context).pop();
});
},
child: Icon(
Icons.cancel,
color: Colors.black,
),
),
Expanded(
child: TextField(
maxLines: 4,
decoration: InputDecoration(
border: InputBorder.none,
),
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
),
GestureDetector(
child: Icon(
Icons.delete_outline_rounded,
color: Colors.black,
),
onTap: () {
print("Transazione Eliminata");
Navigator.of(context).pop();
}),
],
),