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