71 lines
2.4 KiB
Dart
71 lines
2.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'multi_select_item.dart';
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/// Contains common actions that are used by different multi select classes.
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class MultiSelectActions<T> {
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List<T> onItemCheckedChange(List<T> selectedValues, T itemValue, checked) {
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if (checked) {
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selectedValues.add(itemValue);
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} else {
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selectedValues.remove(itemValue);
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}
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return selectedValues;
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}
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/// Pops the dialog from the navigation stack and returns the initially selected values.
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void onCancelTap(BuildContext ctx, List<T> initiallySelectedValues) {
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Navigator.pop(ctx, initiallySelectedValues);
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}
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/// Pops the dialog from the navigation stack and returns the selected values.
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/// Calls the onConfirm function if one was provided.
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void onConfirmTap(BuildContext ctx, List<T> selectedValues, Function(List<T>)? onConfirm) {
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Navigator.pop(ctx, selectedValues);
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if (onConfirm != null) {
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onConfirm(selectedValues);
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}
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}
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/// Pops the dialog from the navigation stack and returns the selected values.
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/// Calls the onCancel function if one was provided.
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void onClearTap(BuildContext ctx, List<T> selectedValues, Function(List<T>)? onCancelTap) {
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Navigator.pop(ctx, selectedValues);
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if (onCancelTap != null) {
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onCancelTap(selectedValues);
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}
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}
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/// Accepts the search query, and the original list of items.
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/// If the search query is valid, return a filtered list, otherwise return the original list.
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List<MultiSelectItem<T>> updateSearchQuery(String? val, List<MultiSelectItem<T>> allItems) {
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if (val != null && val.trim().isNotEmpty) {
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List<MultiSelectItem<T>> filteredItems = [];
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for (var item in allItems) {
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if (item.label.toLowerCase().contains(val.toLowerCase())) {
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filteredItems.add(item);
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}
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}
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return filteredItems;
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} else {
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return allItems;
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}
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}
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/// Toggles the search field.
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bool onSearchTap(showSearch) {
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return !showSearch;
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}
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List<MultiSelectItem<T>> separateSelected(List<MultiSelectItem<T>> list) {
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List<MultiSelectItem<T>> _selectedItems = [];
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List<MultiSelectItem<T>> _nonSelectedItems = [];
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_nonSelectedItems.addAll(list.where((element) => !element.selected));
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_nonSelectedItems.sort((a, b) => a.label.compareTo(b.label));
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_selectedItems.addAll(list.where((element) => element.selected));
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_selectedItems.sort((a, b) => a.label.compareTo(b.label));
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return [..._selectedItems, ..._nonSelectedItems];
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}
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}
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