Flutter / Dart – I have a number of text input boxes on my app, but I still need more rows but haven’t got the room, so need to make each one smaller. I have found the command "isDense: true," works to reduce the size slightly, but I need to reduce them much more, what’s my best option? The labelText and hintText still need to show in each box.
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
const appTitle = 'Diabetic insulin dosage';
return MaterialApp(
debugShowCheckedModeBanner: false,
title: appTitle,
home: Scaffold(
appBar: AppBar(
title: const Text(appTitle),
backgroundColor: Colors.green,
foregroundColor: Colors.black,
),
body: const AddTwoNumbers(),
backgroundColor: Colors.white,
),
);
}
}
class AddTwoNumbers extends StatefulWidget {
const AddTwoNumbers({super.key});
@override
// ignore: library_private_types_in_public_api
_AddTwoNumbersState createState() => _AddTwoNumbersState();
}
class _AddTwoNumbersState extends State<AddTwoNumbers> {
Color _fillColor = Colors.white;
TextEditingController numR1C1controller =
TextEditingController(); //Changed name of the texteditingcontroller as Row as R and Column as C
TextEditingController numR1C2controller = TextEditingController();
TextEditingController numR1C3controller = TextEditingController();
TextEditingController numR2C1controller = TextEditingController();
TextEditingController numR2C2controller = TextEditingController();
TextEditingController numR2C3controller = TextEditingController();
TextEditingController numR3C1controller = TextEditingController();
TextEditingController numR3C2controller = TextEditingController();
TextEditingController numR3C3controller = TextEditingController();
TextEditingController numR4C1controller = TextEditingController();
TextEditingController numR4C2controller = TextEditingController();
TextEditingController numR4C3controller = TextEditingController();
String result = "0";
String result2 = "0";
String result3 = "0";
String result4 = "0";
// MAKE LIST OF MAP TO KEEP TRACK OF EACH BUTTONS
List<Map> buttons = [
{"name": "BreakFast", "active": false, "value": 1.0},
{"name": "Lunch", "active": false, "value": 0.6},
{"name": "Tea", "active": false, "value": 0.55},
];
// YOU CAN SET VARIABLE TO CURRENT MEAL NAME AND CAN CHECK WHETHER IT'S (breakFast) OR NOT
String? currentMealType;
// TOGGLE BUTTON FUNCTION
toggleButtons(Map obj) {
for (var i in buttons) {
if (i['name'] == obj['name']) {
i['active'] = !i['active'];
numR2C2controller.text = obj['value'].toString();
_calculateR2();
} else {
i['active'] = false;
}
}
setState(() {});
}
_calculateR1() {
if (numR1C1controller.text.isNotEmpty &&
numR1C2controller.text.isNotEmpty) {
double sum = double.parse(numR1C1controller.text) -
double.parse(numR1C2controller.text);
numR4C2controller.text = numR1C2controller.text;
numR2C1controller.text = numR1C1controller.text; // <-- add this
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
_calculateR2();
});
result = sum.toStringAsFixed(1);
}
if (numR1C2controller.text.isNotEmpty) {
setState(() {
_fillColor = double.parse(numR1C2controller.text) < 5
? Colors.red
: double.parse(numR1C2controller.text) > 9.1
? Colors.orange
: Colors.green;
});
} else {
setState(() {
_fillColor = Colors.white;
});
}
}
_calculateR2() {
if (numR2C1controller.text.isNotEmpty &&
numR2C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR2C2controller.text) *
double.parse(numR2C1controller.text);
numR2C3controller.text = sum.toStringAsFixed(1);
numR3C1controller.text = numR2C3controller.text;
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
});
result2 = sum.toStringAsFixed(1);
});
}
}
_calculateR3() {
if (numR3C1controller.text.isNotEmpty &&
numR3C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR3C1controller.text) /
double.parse(numR3C2controller.text);
numR3C3controller.text = sum.toStringAsFixed(1);
numR4C1controller.text = numR3C3controller.text;
WidgetsBinding.instance.addPostFrameCallback((_) {
_calculateR3();
_calculateR4();
});
result3 = sum.toStringAsFixed(1);
});
}
}
_calculateR4() {
if (numR4C1controller.text.isNotEmpty &&
numR4C2controller.text.isNotEmpty) {
setState(() {
double sum = double.parse(numR4C1controller.text) -
double.parse(numR4C2controller.text);
numR4C3controller.text = sum.toStringAsFixed(1);
result4 = sum.toStringAsFixed(1);
});
}
}
@override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.all(10.0),
child: Column(
children: [
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Please pick a meal'),
),
// HERE IS THE VIEW FOR BUTTONS
//******************************
Row(
children: buttons
.map(
(btn) => Expanded(
child: GestureDetector(
onTap: () => toggleButtons(btn),
child: Container(
padding: const EdgeInsets.all(20.0),
margin: const EdgeInsets.only(bottom: 10, right: 10),
decoration: BoxDecoration(
color: btn['active'] ? Colors.red : Colors.white,
border: Border.all(color: Colors.grey[300]!)),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text(btn['name'],
style: TextStyle(
color: btn['active']
? Colors.white
: Colors.black)),
Text(btn['value'].toString(),
style: TextStyle(
color: btn['active']
? Colors.white
: Colors.black))
],
),
),
),
),
)
.toList(),
),
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Input Data'),
),
//******************************
Row(
children: <Widget>[
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
controller: numR1C1controller,
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,1}'))
],
decoration: InputDecoration(
border: const OutlineInputBorder(),
labelText: 'Carbs in Meal',
isDense: true,
hintText: 'Enter First Number',
fillColor: _fillColor,
filled: false),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR1C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,1}'))
],
decoration: InputDecoration(
border: const OutlineInputBorder(),
filled: true,
labelText: 'Current B/G Level',
isDense: true,
hintText: 'Enter Second Number',
fillColor: _fillColor),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14.0),
onChanged: (value) => _calculateR1(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR1C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Excercise Factor',
isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
const Padding(
padding: EdgeInsets.all(6.0),
child: Text('Calculations'),
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0, height: 1.0),
onChanged: (value) => _calculateR2(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'T Carbs in meal',
isDense: true,
hintText: 'Enter Third Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR2(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'T Meal Ratio',
isDense: true,
hintText: 'Enter Fourth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR2C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Result 2',
isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'T Result 2',
// isDense: true,
hintText: 'Enter Fifth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Correction Factor',
// isDense: true,
hintText: 'Enter Sixth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR3(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR3C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Result 3',
// isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
const SizedBox(
height: 8,
),
Row(
children: [
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C1controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'T Target Level',
// isDense: true,
hintText: 'Enter Seventh Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C2controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'T Current B/G Level',
// isDense: true,
hintText: 'Enter Eighth Number',
),
),
),
const SizedBox(
width: 8,
),
Expanded(
child: TextField(
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 20.0),
onChanged: (value) => _calculateR4(),
keyboardType:
const TextInputType.numberWithOptions(decimal: true),
controller: numR4C3controller,
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.allow(
RegExp(r'^(d+)?.?d{0,2}'))
],
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Result 4',
// isDense: true,
hintText: '',
),
),
),
const SizedBox(
width: 8,
),
],
),
],
),
);
}
}
3
Answers
If you want to make it even smaller, you can wrap it in
SizedBoxand give it someheight(andwidth).Set
contentPaddingto zero in the decoration ofTextFieldi.e.Simply wrap your your widget with sizedbox for height and width & for inner padding use content padding