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outsource inputfields, added input validation onChange

main
Julian Gegner 2022-11-08 22:11:18 +01:00
parent c8380be8db
commit 50b337e1cd
2 changed files with 51 additions and 88 deletions
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42
lib/widgets/ExpandedNumberInputWidget.dart 100644
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@ -0,0 +1,42 @@
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
class ExpandedNumberInputWidget extends StatelessWidget {
String _labelDisplayText = "";
String _hintText = "";
void Function(double) _setValue = (x) => {};
ExpandedNumberInputWidget(String labelDisplayText, String hintText, void Function(double) setValue, {super.key}) {
_labelDisplayText = labelDisplayText;
_hintText = hintText;
_setValue = setValue;
}
@override
Widget build(BuildContext context) {
return Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double? number = double.tryParse(value);
if (number == null){
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('Bitte eine gültige Zahl eingeben')),
);
}else{
ScaffoldMessenger.of(context).hideCurrentSnackBar();
_setValue(number);
}
},
decoration: InputDecoration(
labelText: _labelDisplayText,
hintText: _hintText,
),
)
);
}
}

97
lib/widgets/MyInputWidget.dart
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@ -1,61 +1,24 @@
import 'package:energy_bilance/models/EnergyBilanceModel.dart';
import 'package:energy_bilance/widgets/ExpandedNumberInputWidget.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import '../models/EnergyBilanceModel.dart';
class MyInputWidget extends StatelessWidget {
const MyInputWidget({super.key});
@override
Widget build(BuildContext context) {
final model = Provider.of<EnergyBilanceModel>(context);
return Column(
return Column(
children: [
Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.start,
children: [
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double number = double.parse(value);
model.setStartVelocity(number);
},
validator: (value) {
if(value == null){
return null;
}
final number = num.tryParse(value);
if(number == null){
return '"$value" ist keine Zahl';
}
return null;
},
decoration: const InputDecoration(
labelText: 'Anfangsgeschwindigkeit',
hintText: 'in m/s'
),
)
),
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double number = double.parse(value);
model.setEndVelocity(number);
},
decoration: const InputDecoration(
labelText: 'Endgeschwindigkeit',
hintText: 'in m/s'
),
)
),
ExpandedNumberInputWidget("Anfangsgeschwindigkeit", "in m/s", model.setStartVelocity),
ExpandedNumberInputWidget("Endgeschwindigkeit", "in m/s", model.setEndVelocity)
],
),
Row(
@ -63,53 +26,11 @@ class MyInputWidget extends StatelessWidget {
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double number = double.parse(value);
model.setStartHeight(number);
},
decoration: const InputDecoration(
labelText: 'Anfangshöhe',
hintText: 'in m'
),
)
),
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double number = double.parse(value);
model.setEndHeight(number);
},
decoration: const InputDecoration(
labelText: 'Endhöhe',
hintText: 'in m'
),
)
),
ExpandedNumberInputWidget("Anfangshöhe", "in m", model.setStartHeight),
ExpandedNumberInputWidget("Endhöhe", "in m", model.setEndHeight),
],
),
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
inputFormatters: [FilteringTextInputFormatter.allow(RegExp('[0-9.]'))],
onChanged: (value) {
double? number = double.tryParse(value);
if(number != null){
model.setWeight(number);
}
},
decoration: const InputDecoration(
labelText: 'Gewicht',
hintText: 'in kg'
),
)
),
ExpandedNumberInputWidget("Gewicht", "in kg", model.setWeight),
]
);