77 lines
1.9 KiB
Dart
77 lines
1.9 KiB
Dart
import 'package:flutter/material.dart';
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class SelectableChips<T, K> extends StatelessWidget {
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final List<T> availableItems;
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final T? selectedItem;
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final int maxCount;
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final K Function(T item) itemId;
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final Widget Function(T item) itemLabel;
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final Widget Function(T item)? itemAvatar;
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final void Function(T item)? onSelected;
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final void Function(T item)? onDeleted;
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const SelectableChips({
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required this.itemId,
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required this.itemLabel,
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this.itemAvatar,
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required this.availableItems,
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this.selectedItem,
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this.maxCount = 25,
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this.onSelected,
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this.onDeleted,
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super.key,
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});
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@override
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Widget build(BuildContext context) {
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var items = availableItems.take(maxCount).toList();
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if (selectedItem case final T selectedItem) {
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final selectedIndex = items.indexWhere(
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(item) => itemId(item) == itemId(selectedItem),
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);
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if (selectedIndex < 0) {
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items = [
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selectedItem,
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...items,
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];
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} else {
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items = [
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items.removeAt(selectedIndex),
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...items,
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];
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}
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}
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return ListView.builder(
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scrollDirection: Axis.horizontal,
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shrinkWrap: true,
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itemCount: items.length,
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itemBuilder: (context, index) {
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final item = items[index];
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return Padding(
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padding: const EdgeInsets.only(right: 8.0),
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child: FilterChip(
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selected: selectedItem != null &&
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itemId(item) == itemId(selectedItem as T),
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showCheckmark: false,
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onSelected: (value) {
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if (value) {
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onSelected?.call(item);
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} else {
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onDeleted?.call(item);
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}
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},
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onDeleted: () {
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onDeleted?.call(item);
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},
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label: itemLabel.call(item),
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avatar: itemAvatar?.call(item),
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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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