74 lines
1.7 KiB
Dart
74 lines
1.7 KiB
Dart
import 'package:flutter/cupertino.dart'; // Für iOS-Style
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class Stepper extends StatefulWidget {
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final int minValue;
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final int maxValue;
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final int? initialValue;
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final int step;
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final ValueChanged<int> onChanged;
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const Stepper({
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super.key,
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required this.minValue,
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required this.maxValue,
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required this.step,
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required this.onChanged,
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this.initialValue,
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});
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@override
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// ignore: library_private_types_in_public_api
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_StepperState createState() => _StepperState();
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}
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class _StepperState extends State<Stepper> {
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late int _value;
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@override
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void initState() {
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super.initState();
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final start = widget.initialValue ?? widget.minValue;
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_value = start.clamp(widget.minValue, widget.maxValue);
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}
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@override
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Widget build(BuildContext context) {
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return Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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CupertinoButton(
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padding: const EdgeInsets.all(8),
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onPressed: _decrement,
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child: const Icon(CupertinoIcons.minus),
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),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 12.0),
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child: Text('$_value', style: const TextStyle(fontSize: 18)),
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),
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CupertinoButton(
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padding: const EdgeInsets.all(8),
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onPressed: _increment,
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child: const Icon(CupertinoIcons.add),
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),
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],
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);
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}
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void _increment() {
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if (_value + widget.step <= widget.maxValue) {
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setState(() {
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_value += widget.step;
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widget.onChanged.call(_value);
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});
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}
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}
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void _decrement() {
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if (_value - widget.step >= widget.minValue) {
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setState(() {
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_value -= widget.step;
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widget.onChanged.call(_value);
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});
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}
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}
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}
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