116 lines
3.4 KiB
Dart
116 lines
3.4 KiB
Dart
import 'package:fading_scroll/fading_scroll.dart';
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import 'package:flutter/material.dart';
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class _BadgeWrapper extends StatelessWidget {
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final Widget child;
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final int? count;
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const _BadgeWrapper({required this.child, this.count});
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@override
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Widget build(BuildContext context) {
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return count != null
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? Badge.count(
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count: count!,
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backgroundColor: Theme.of(context).colorScheme.primaryContainer,
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textColor: Theme.of(context).colorScheme.onPrimaryContainer,
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child: child,
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)
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: child;
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}
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}
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class SelectableChips<T extends S, S, K> extends StatelessWidget {
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final List<T> availableItems;
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final S? selectedItem;
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final int maxCount;
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final bool deleteIcon;
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final K Function(S 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 String? Function(T item)? itemTooltip;
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final int? Function(T item)? itemBadgeCount;
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final Widget Function(Widget child, S item)? itemWrap;
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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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this.itemBadgeCount,
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this.itemWrap,
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this.itemTooltip,
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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.deleteIcon = true,
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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 = [selectedItem, ...items];
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} else {
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items = [items.removeAt(selectedIndex), ...items];
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}
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}
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return FadingScroll(
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fadingSize: 15,
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builder: (context, controller) {
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return ListView.builder(
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controller: controller,
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//Improve list performance by not rendering outside screen at all
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cacheExtent: 0,
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scrollDirection: Axis.horizontal,
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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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final child = Padding(
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padding: const EdgeInsets.only(right: 8.0, top: 4.0),
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child: _BadgeWrapper(
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count: itemBadgeCount?.call(item),
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child: FilterChip(
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selected:
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selectedItem != null &&
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itemId(item) == itemId(selectedItem as S),
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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: deleteIcon
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? () {
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onDeleted?.call(item);
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}
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: null,
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label: itemLabel.call(item),
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avatar: itemAvatar?.call(item),
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tooltip: itemTooltip?.call(item),
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),
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),
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);
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return (itemWrap != null) ? itemWrap!(child, item) : child;
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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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