public void SelectionChanged(SelectionChangedEventArgs args)
{
lock (SelectedItems) {
CollectionExtensions.RemoveAll(SelectedItems, args.RemovedItems.Cast <PickCollectionDataModel>().ToArray());
SelectedItems.AddRange(args.AddedItems.Cast <PickCollectionDataModel>());
}
}
/// <summary>
/// 点击 Header 选择复选框时触发此方法
/// </summary>
/// <param name="state"></param>
/// <param name="val"></param>
protected virtual async Task OnHeaderCheck(CheckboxState state, TItem val)
{
switch (state)
{
case CheckboxState.Checked:
// select all
SelectedItems.Clear();
SelectedItems.AddRange(Items);
// callback
await OnSelectedRowsChanged();
StateHasChanged();
break;
case CheckboxState.UnChecked:
// unselect all
SelectedItems.Clear();
// callback
await OnSelectedRowsChanged();
StateHasChanged();
break;
default:
break;
}
}
/// <summary>
/// Notifies that the collection of selected items has changed in the control. Updates the collection of selected items in the view model.
/// This method must be invoked by the implementations of the <see cref="BindableSelectedItemsBehavior{T}"/>.
/// </summary>
/// <param name="addedItems">The list of items that have been added to the selection.</param>
/// <param name="removedItems">The list of items that have been removed from the selection.</param>
protected void ControlSelectionChanged(IEnumerable addedItems, IList removedItems)
{
if (BindableSelectedItemsControl.DisableBindings)
{
return;
}
if (SelectedItems != null)
{
updatingCollection = true;
if (removedItems != null)
{
// Optimize removal if most of the selected items are removed
if (removedItems.Count > SelectedItems.Count / 2)
{
var remainingItems = SelectedItems.Where(x => !removedItems.Contains(x)).ToList();
SelectedItems.Clear();
SelectedItems.AddRange(remainingItems);
}
else
{
foreach (var removedItem in removedItems.Cast <object>())
{
SelectedItems.Remove(removedItem);
}
}
}
if (addedItems != null)
{
SelectedItems.AddRange(addedItems.Cast <object>().Where(x => !SelectedItems.Contains(x)));
}
updatingCollection = false;
}
}
/// <summary>
/// 点击 Header 选择复选框时触发此方法
/// </summary>
/// <param name="state"></param>
/// <param name="val"></param>
protected virtual Task OnHeaderCheck(CheckboxState state, TItem val)
{
if (Items != null)
{
switch (state)
{
case CheckboxState.Checked:
// select all
SelectedItems.Clear();
SelectedItems.AddRange(Items);
StateHasChanged();
break;
case CheckboxState.UnChecked:
// unselect all
SelectedItems.Clear();
StateHasChanged();
break;
default:
break;
}
}
return(Task.CompletedTask);
}
/// <summary>
/// Initializes a new instance of the <see cref="GarnishSelectViewModel"/> class.
/// </summary>
/// <param name="dialogService">Dialog service dependency.</param>
/// <param name="garnishService">Tag service dependency.</param>
/// <param name="selectedGarnishes">Loc25 provider dependency.</param>
public GarnishSelectViewModel(DialogService dialogService,
CRUDService <Recipe> garnishService,
IEnumerable <RecipeEdit> selectedGarnishes)
: base(dialogService)
{
AllGarnishes = garnishService.GetMapped <RecipeEdit>(x => x.Tags.Any(t => t.Name == "Гарниры")).OrderBy(x => x.Name).ToList();
SelectedItems.AddRange(AllGarnishes.Intersect(selectedGarnishes));
}
/// <summary>
/// 点击 Header 选择复选框时触发此方法
/// </summary>
/// <param name="state"></param>
/// <param name="val"></param>
protected virtual void OnHeaderCheck(CheckboxState state, bool val)
{
SelectedItems.Clear();
if (state == CheckboxState.Checked && Items != null)
{
SelectedItems.AddRange(Items);
}
ItemCheckboxs?.ForEach(checkbox => checkbox.SetState(state));
}
private async Task InvertSelect()
{
var items = Items.Where(i => !SelectedItems.Any(item => item == i)).ToList();
SelectedItems.Clear();
SelectedItems.AddRange(items);
await TriggerSelectedItemChanged();
}
/// <summary>
/// 调用 OnQuery 回调方法获得数据源
/// </summary>
protected async Task QueryData()
{
// https://gitee.com/LongbowEnterprise/BootstrapBlazor/issues/I29YK1
// TODO: 选中行目前不支持跨页
// 原因是选中行实例无法在翻页后保持
SelectedItems.Clear();
QueryData <TItem>?queryData = null;
var queryOption = new QueryPageOptions()
{
PageIndex = PageIndex,
PageItems = PageItems,
SearchText = SearchText,
SortOrder = SortOrder,
SortName = SortName,
Filters = Filters.Values,
Searchs = GetSearchs(),
SearchModel = SearchModel
};
if (OnQueryAsync != null)
{
queryData = await OnQueryAsync(queryOption);
}
else if (UseInjectDataService)
{
queryData = await GetDataService().QueryAsync(queryOption);
}
if (queryData != null)
{
Items = queryData.Items;
TotalCount = queryData.TotalCount;
IsFiltered = queryData.IsFiltered;
IsSorted = queryData.IsSorted;
IsSearch = queryData.IsSearch;
// 外部未过滤，内部自行过滤
if (!IsFiltered && Filters.Any())
{
Items = Items.Where(Filters.Values.GetFilterFunc <TItem>());
TotalCount = Items.Count();
}
// 外部未处理排序，内部自行排序
if (!IsSorted && SortOrder != SortOrder.Unset && !string.IsNullOrEmpty(SortName))
{
var invoker = SortLambdaCache.GetOrAdd(typeof(TItem), key => Items.GetSortLambda().Compile());
Items = invoker(Items, SortName, SortOrder);
}
}
if (!IsRendered && SelectedRows != null)
{
SelectedItems.AddRange(Items.Where(i => SelectedRows.Contains(i)));
}
}
/// <summary>
/// 点击 Header 选择复选框时触发此方法
/// </summary>
/// <param name="state"></param>
/// <param name="val"></param>
protected virtual Task OnHeaderCheck(CheckboxState state, bool val)
{
SelectedItems.Clear();
if (state == CheckboxState.Checked && Items != null)
{
SelectedItems.AddRange(Items);
}
ItemCheckboxs?.ForEach(async checkbox => await checkbox.SetState(state));
return(Task.CompletedTask);
}
/// <summary>
/// Initializes a new instance of the <see cref="TagSelectViewModel"/> class.
/// </summary>
/// <param name="dialogService">Dialog service dependency.</param>
/// <param name="tagService">Tag service dependency.</param>
/// <param name="selectedTags">Alredy existing tags for editing.</param>
/// <param name="allTags">All tags to select from.</param>
public TagSelectViewModel(DialogService dialogService,
CRUDService <Tag> tagService,
IEnumerable <TagEdit> selectedTags,
IList <TagEdit>?allTags = null)
: base(dialogService)
{
this.tagService = tagService;
AddTagCommand = new DelegateCommand(AddTagAsync);
AllTags = new ObservableCollection <TagEdit>(allTags ?? tagService.GetProjected <TagEdit>());
SelectedItems.AddRange(AllTags.Intersect(selectedTags));
AllTags.CollectionChanged += AllTags_CollectionChanged;
}
private void btnAdd_Click(object sender, EventArgs e)
{
var selectedItems = GetSelectedItems(lstAvailableItems);
if (!selectedItems.Any())
{
return;
}
SelectedItems.AddRange(selectedItems);
BindData();
RaiseSelectedItemsChanged();
}
/// <summary>
/// 更改组件数据源方法
/// </summary>
/// <param name="items"></param>
public void SetItems(IEnumerable <SelectedItem>?items)
{
Items = items;
ResetItems();
// 重置选中项
SelectedItems.Clear();
if (items != null)
{
SelectedItems.AddRange(items.Where(i => i.Active));
}
StateHasChanged();
}
public void SelectionChanged(SelectionChangedEventArgs args)
{
SelectedItems.AddRange(args.AddedItems.Cast <PresetItemViewModel>());
SelectedItems.RemoveRange(args.RemovedItems.Cast <PresetItemViewModel>());
if (args.AddedItems.Count == 0 && !SelectedItems.Any())
{
eventAggregator.Publish(new Events.PresetItemsSelectionChanged(false));
}
if (args.RemovedItems.Count == 0 && SelectedItems.Count == 1)
{
eventAggregator.Publish(new Events.PresetItemsSelectionChanged(true));
}
}
private void UpdatePrivacy(UserPrivacySettingRules rules)
{
var disallowed = rules.Rules.FirstOrDefault(x => x is UserPrivacySettingRuleRestrictUsers) as UserPrivacySettingRuleRestrictUsers;
if (disallowed == null)
{
disallowed = new UserPrivacySettingRuleRestrictUsers(new int[0]);
}
var users = ProtoService.GetUsers(disallowed.UserIds);
BeginOnUIThread(() =>
{
SelectedItems.AddRange(users);
});
}
void SelectionChanged(object para)
{
var selectionEvent = (para as SelectionChangedEventArgs);
if (selectionEvent.RemovedItems.Count > 0)
{
foreach (var toRemove in selectionEvent.RemovedItems.Cast <Mediafile>())
{
SelectedItems.Remove(toRemove);
}
}
if (selectionEvent.AddedItems.Count > 0)
{
SelectedItems.AddRange(selectionEvent.AddedItems.Cast <Mediafile>().ToList());
}
}
public void SelectAll(ItemCollection items)
{
try {
Updating = true;
if (Mode == SelectionMode.Single)
{
throw new NotSupportedException("Cannot call SelectAll when in Single select mode");
}
var toSelect = new List <object> ();
foreach (var v in items)
{
if (!SelectedItems.Contains(v))
{
toSelect.Add(v);
}
}
if (toSelect.Count == 0)
{
return;
}
SelectedItems.AddRange(toSelect);
if (SelectedItem == null)
{
SelectedItem = toSelect [0];
UpdateSelectorProperties(SelectedItem, Owner.Items.IndexOf(SelectedItem), Owner.GetValueFromItem(SelectedItem));
}
Owner.SelectedItemsIsInvalid = true;
Owner.RaiseSelectionChanged(Empty, toSelect);
} finally {
Updating = false;
}
}
/// <summary>
/// 点击 Header 选择复选框时触发此方法
/// </summary>
/// <param name="state"></param>
/// <param name="val"></param>
protected virtual Task OnHeaderCheck(CheckboxState state, TItem val)
{
switch (state)
{
case CheckboxState.Checked:
// select all
SelectedItems.Clear();
SelectedItems.AddRange(Items);
// callback
if (SelectedRowsChanged.HasDelegate)
{
SelectedRowsChanged.InvokeAsync(SelectedRows);
}
StateHasChanged();
break;
case CheckboxState.UnChecked:
// unselect all
SelectedItems.Clear();
// callback
if (SelectedRowsChanged.HasDelegate)
{
SelectedRowsChanged.InvokeAsync(SelectedRows);
}
StateHasChanged();
break;
default:
break;
}
return(Task.CompletedTask);
}
private void OnSelectedItemsListChanged()
{
SelectedItems.Clear();
SelectedItems.AddRange(SelectedItemsList.Cast <IFileSystemInfo>());
}
/// <summary>
/// 调用 OnQuery 回调方法获得数据源
/// </summary>
protected async Task QueryData()
{
// https://gitee.com/LongbowEnterprise/BootstrapBlazor/issues/I29YK1
// 选中行目前不支持跨页 原因是选中行实例无法在翻页后保持
SelectedItems.Clear();
QueryData <TItem>?queryData = null;
var queryOption = new QueryPageOptions()
{
IsPage = IsPagination,
PageIndex = PageIndex,
PageItems = PageItems,
SearchText = SearchText,
SortOrder = SortOrder,
SortName = SortName,
Filters = Filters.Values,
Searchs = GetSearchs(),
SearchModel = SearchModel
};
if (OnQueryAsync != null)
{
queryData = await OnQueryAsync(queryOption);
}
else if (UseInjectDataService)
{
queryData = await GetDataService().QueryAsync(queryOption);
}
if (queryData != null)
{
Items = queryData.Items;
if (IsTree)
{
KeySet.Clear();
if (TableTreeNode <TItem> .HasKey)
{
CheckExpandKeys(TreeRows);
}
if (KeySet.Count > 0)
{
TreeRows = new List <TableTreeNode <TItem> >();
foreach (var item in Items)
{
var node = new TableTreeNode <TItem>(item)
{
HasChildren = CheckTreeChildren(item),
};
node.IsExpand = node.HasChildren && node.Key != null && KeySet.Contains(node.Key);
if (node.IsExpand)
{
await RestoreIsExpand(node);
}
TreeRows.Add(node);
}
}
else
{
TreeRows = Items.Select(item => new TableTreeNode <TItem>(item)
{
HasChildren = CheckTreeChildren(item)
}).ToList();
}
}
TotalCount = queryData.TotalCount;
IsFiltered = queryData.IsFiltered;
IsSorted = queryData.IsSorted;
IsSearch = queryData.IsSearch;
// 外部未过滤，内部自行过滤
if (!IsFiltered && Filters.Any())
{
Items = Items.Where(Filters.Values.GetFilterFunc <TItem>());
TotalCount = Items.Count();
}
// 外部未处理排序，内部自行排序
if (!IsSorted && SortOrder != SortOrder.Unset && !string.IsNullOrEmpty(SortName))
{
var invoker = SortLambdaCache.GetOrAdd(typeof(TItem), key => LambdaExtensions.GetSortLambda <TItem>().Compile());
Items = invoker(Items, SortName, SortOrder);
}
}
if (SelectedRows != null)
{
SelectedItems.AddRange(Items.Where(i => SelectedRows.Contains(i)));
}
}
private async Task SelectAll()
{
SelectedItems.AddRange(Items);
await TriggerSelectedItemChanged();
}
public void SelectAll()
{
DeselectAll();
SelectedItems.AddRange(Enumerable.Range(0, _fansCache.Count));
NotifyDataSetChanged();
}
