81 lines
2.1 KiB
Dart
81 lines
2.1 KiB
Dart
import 'package:flutter/material.dart';
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import 'bottom_modal.dart';
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/// A picker with radio values (only one value can be picked at once)
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class RadioPicker<T> extends StatelessWidget {
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final List<T> values;
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final T groupValue;
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final ValueChanged<T>? onChanged;
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/// Map a given value to a string for display
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final String Function(T)? mapValueToString;
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final String? title;
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/// custom button builder. When null, an OutlinedButton is used
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final Widget Function(
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BuildContext context, String displayValue, VoidCallback? onPressed)?
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buttonBuilder;
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final Widget? trailing;
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const RadioPicker({
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super.key,
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required this.values,
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required this.groupValue,
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required this.onChanged,
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this.mapValueToString,
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this.buttonBuilder,
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this.title,
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this.trailing,
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});
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@override
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Widget build(BuildContext context) {
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final mapValueToString =
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this.mapValueToString ?? (value) => value.toString();
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final buttonBuilder = this.buttonBuilder ??
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(context, displayString, onPressed) => OutlinedButton(
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onPressed: onPressed,
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(displayString),
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const Icon(Icons.arrow_drop_down),
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],
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),
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);
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Future<void> onPressed() async {
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final value = await showBottomModal<T>(
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context: context,
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title: title,
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builder: (context) => Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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for (final value in values)
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RadioListTile<T>(
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value: value,
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groupValue: groupValue,
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title: Text(mapValueToString(value)),
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onChanged: (value) => Navigator.of(context).pop(value),
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),
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if (trailing != null) trailing!
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],
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),
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);
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if (value != null) {
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onChanged?.call(value);
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}
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}
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return buttonBuilder(
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context,
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mapValueToString(groupValue),
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onChanged == null ? null : onPressed,
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);
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}
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}
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