73 lines
2.0 KiB
Dart
73 lines
2.0 KiB
Dart
import 'package:flutter/material.dart';
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class FlutterCountController extends StatefulWidget {
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const FlutterCountController({
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Key? key,
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required this.decrementIconBuilder,
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required this.incrementIconBuilder,
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required this.countBuilder,
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required this.count,
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required this.updateCount,
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this.stepSize = 1,
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this.minimum,
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this.maximum,
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this.contentPadding = const EdgeInsets.symmetric(horizontal: 25.0),
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}) : super(key: key);
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final Widget Function(bool enabled) decrementIconBuilder;
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final Widget Function(bool enabled) incrementIconBuilder;
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final Widget Function(int count) countBuilder;
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final int count;
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final Function(int) updateCount;
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final int stepSize;
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final int? minimum;
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final int? maximum;
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final EdgeInsetsGeometry contentPadding;
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@override
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_FlutterCountControllerState createState() =>
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_FlutterCountControllerState();
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}
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class _FlutterCountControllerState
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extends State<FlutterCountController> {
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int get count => widget.count;
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int? get minimum => widget.minimum;
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int? get maximum => widget.maximum;
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int get stepSize => widget.stepSize;
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bool get canDecrement => minimum == null || count - stepSize >= minimum!;
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bool get canIncrement => maximum == null || count + stepSize <= maximum!;
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void _decrementCounter() {
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if (canDecrement) {
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setState(() => widget.updateCount(count - stepSize));
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}
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}
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void _incrementCounter() {
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if (canIncrement) {
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setState(() => widget.updateCount(count + stepSize));
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}
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}
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@override
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Widget build(BuildContext context) => Padding(
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padding: widget.contentPadding,
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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InkWell(
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onTap: _decrementCounter,
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child: widget.decrementIconBuilder(canDecrement),
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),
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widget.countBuilder(count),
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InkWell(
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onTap: _incrementCounter,
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child: widget.incrementIconBuilder(canIncrement),
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),
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],
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),
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);
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}
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