132 lines
3.3 KiB
Dart
132 lines
3.3 KiB
Dart
import 'package:flutter/material.dart';
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class SelectorItem<T> {
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const SelectorItem(this.value, this.text);
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final T value;
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final String text;
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}
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class DropdownSelector<T> extends StatefulWidget {
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const DropdownSelector({
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required this.title,
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required this.onChanged,
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required this.values,
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required this.initialValue,
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super.key,
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});
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/// The title of the dropdown
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final String title;
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final List<SelectorItem<T>> values;
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final T initialValue;
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/// Called when the selection has changed
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final void Function(T) onChanged;
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@override
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DropdownSelectorState<T> createState() => DropdownSelectorState<T>();
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}
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class DropdownSelectorDialog<T> extends StatelessWidget {
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const DropdownSelectorDialog({
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required this.values,
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super.key,
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});
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final List<SelectorItem<T>> values;
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@override
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Widget build(BuildContext context) {
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return SafeArea(
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child: Material(
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color: Theme.of(context).scaffoldBackgroundColor,
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child: ListView.builder(
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itemCount: values.length,
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itemBuilder: (context, index) => InkWell(
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onTap: () {
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Navigator.of(context).pop(values[index].value);
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},
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child: Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Padding(
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padding: const EdgeInsets.all(16),
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child: Text(
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values[index].text,
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style: Theme.of(context).textTheme.titleLarge,
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),
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),
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],
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),
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),
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),
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),
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);
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}
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}
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class DropdownSelectorState<T> extends State<DropdownSelector<T>> {
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late int index;
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@override
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void initState() {
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super.initState();
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index =
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widget.values.indexWhere((item) => item.value == widget.initialValue);
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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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children: [
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Expanded(
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child: Card(
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clipBehavior: Clip.hardEdge,
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child: InkWell(
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onTap: () async {
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final result = await showDialog<T>(
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context: context,
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builder: (context) => DropdownSelectorDialog<T>(
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values: widget.values.cast<SelectorItem<T>>(),
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),
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);
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if (result == null) return;
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if (result == widget.values[index].value) return;
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setState(() {
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index =
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widget.values.indexWhere((item) => item.value == result);
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});
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widget.onChanged(result);
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},
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child: Padding(
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padding: const EdgeInsets.all(12),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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widget.title,
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style: Theme.of(context).textTheme.titleSmall,
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),
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Text(
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widget.values[index].text,
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style: Theme.of(context).textTheme.bodyLarge,
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),
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],
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),
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),
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),
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),
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),
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],
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);
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}
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}
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