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@@ -1,288 +1,120 @@
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Linq;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Input;
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using HandyControl.Data;
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using HandyControl.Interactivity;
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using HandyControl.Tools.Extension;
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namespace HandyControl.Controls;
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/// <summary>
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/// 穿梭框
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/// </summary>
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[TemplatePart(Name = ElementItemsOrigin, Type = typeof(SimpleItemsControl))]
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[TemplatePart(Name = ElementItemsSelected, Type = typeof(SimpleItemsControl))]
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public class Transfer : SimpleItemsControl
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[TemplatePart(Name = ElementSelectedListBox, Type = typeof(ListBox))]
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[DefaultEvent(nameof(Transferred))]
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public class Transfer : ListBox
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{
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private const string ElementItemsOrigin = "PART_ItemsOrigin";
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private const string ElementSelectedListBox = "PART_SelectedListBox";
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private const string ElementItemsSelected = "PART_ItemsSelected";
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public static readonly RoutedEvent TransferredEvent =
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EventManager.RegisterRoutedEvent("Transferred", RoutingStrategy.Bubble,
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typeof(RoutedEventHandler), typeof(Transfer));
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private readonly Dictionary<object, TransferEntry> _entryDic = new();
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private readonly List<TransferEntry> _entryList = new();
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private SimpleItemsControl _itemsOrigin;
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private SimpleItemsControl _itemsSelected;
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private IEnumerable _itemsSourceInternal;
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private IEnumerable _initEnumerable;
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private NotifyCollectionChangedEventArgs _initArgs;
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public static readonly RoutedEvent SelectionChangedEvent =
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EventManager.RegisterRoutedEvent("SelectionChanged", RoutingStrategy.Bubble,
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typeof(SelectionChangedEventHandler), typeof(Transfer));
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public event SelectionChangedEventHandler SelectionChanged
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[Category("Behavior")]
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public event RoutedEventHandler Transferred
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{
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add => AddHandler(SelectionChangedEvent, value);
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remove => RemoveHandler(SelectionChangedEvent, value);
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add => AddHandler(TransferredEvent, value);
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remove => RemoveHandler(TransferredEvent, value);
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}
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private static readonly DependencyPropertyKey SelectedItemsPropertyKey =
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DependencyProperty.RegisterReadOnly(
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"SelectedItems",
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typeof(IList),
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typeof(Transfer),
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new FrameworkPropertyMetadata(default(IList)));
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public static readonly DependencyProperty SelectedItemsProperty = SelectedItemsPropertyKey.DependencyProperty;
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public IList SelectedItems
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{
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get => (IList) GetValue(SelectedItemsProperty);
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set => SetValue(SelectedItemsProperty, value);
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}
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private ListBox _selectedListBox;
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public Transfer()
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{
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CommandBindings.Add(new CommandBinding(ControlCommands.Selected, SelectItems));
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CommandBindings.Add(new CommandBinding(ControlCommands.Cancel, DeselectItems));
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Loaded += OnLoaded;
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}
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SetValue(SelectedItemsPropertyKey, new ObservableCollection<object>());
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private void OnLoaded(object sender, RoutedEventArgs e)
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{
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SelectItems(null, null);
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}
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public override void OnApplyTemplate()
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{
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_itemsOrigin?.ItemsHost.Children.Clear();
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_itemsSelected?.ItemsHost.Children.Clear();
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base.OnApplyTemplate();
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_itemsOrigin = GetTemplateChild(ElementItemsOrigin) as SimpleItemsControl;
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_itemsSelected = GetTemplateChild(ElementItemsSelected) as SimpleItemsControl;
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if (_itemsOrigin != null && _itemsSelected != null)
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{
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if (_initEnumerable != null)
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{
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OnItemsSourceChanged(null, _initEnumerable);
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_initEnumerable = null;
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}
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if (_initArgs != null)
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{
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InternalCollectionChanged(null, _initArgs);
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_initArgs = null;
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}
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if (_itemsOrigin.Items.Count == 0)
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{
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Refresh();
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}
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}
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_selectedListBox = GetTemplateChild(ElementSelectedListBox) as ListBox;
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}
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private void InsertItem(int index, object item, bool isTransferred = false)
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protected virtual void OnTransferred(RoutedEventArgs e)
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{
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var origin = new TransferItem
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{
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Content = item,
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IsTransferred = isTransferred
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};
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var selected = new TransferItem
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{
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Content = item,
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IsOrigin = false,
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IsTransferred = isTransferred
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};
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var entry = new TransferEntry
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{
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OriginItem = origin,
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SelectedItem = selected
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};
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_entryDic.Add(item, entry);
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_entryList.Insert(index, entry);
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_itemsOrigin.Items.Insert(index, origin);
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_itemsSelected.Items.Insert(index, selected);
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RaiseEvent(e);
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}
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private void AddItem(object item) => InsertItem(_entryDic.Count, item);
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private void RemoveItem(object item)
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{
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if (_entryDic.TryGetValue(item, out var entry))
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{
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_itemsOrigin.Items.Remove(entry.OriginItem);
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_itemsSelected.Items.Remove(entry.SelectedItem);
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_entryDic.Remove(item);
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_entryList.Remove(entry);
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}
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}
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private void ClearItems()
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{
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_entryDic.Clear();
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_entryList.Clear();
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_itemsOrigin.Items.Clear();
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_itemsSelected.Items.Clear();
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}
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protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
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{
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if (_itemsOrigin == null || _itemsSelected == null)
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{
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_initEnumerable = newValue;
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return;
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}
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if (_itemsSourceInternal != null)
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{
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if (_itemsSourceInternal is INotifyCollectionChanged s)
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{
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s.CollectionChanged -= InternalCollectionChanged;
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}
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ClearItems();
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}
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_itemsSourceInternal = newValue;
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if (_itemsSourceInternal != null)
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{
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if (_itemsSourceInternal is INotifyCollectionChanged s)
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{
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s.CollectionChanged += InternalCollectionChanged;
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}
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foreach (var item in _itemsSourceInternal)
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{
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AddItem(item);
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}
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}
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}
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private void InternalCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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if (_itemsOrigin == null || _itemsSelected == null)
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{
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_initArgs = e;
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return;
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}
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switch (e.Action)
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{
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case NotifyCollectionChangedAction.Add:
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if (e.NewItems != null)
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{
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foreach (var item in e.NewItems)
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{
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AddItem(item);
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}
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}
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break;
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case NotifyCollectionChangedAction.Remove:
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if (e.OldItems != null)
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{
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foreach (var item in e.OldItems)
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{
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RemoveItem(item);
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}
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}
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break;
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case NotifyCollectionChangedAction.Replace:
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case NotifyCollectionChangedAction.Move:
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if (e.OldItems != null && e.NewItems != null)
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{
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var oldItem = e.OldItems[0];
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if (_entryDic.TryGetValue(oldItem, out var entry))
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{
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var isTransferred = entry.SelectedItem.IsTransferred;
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RemoveItem(oldItem);
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InsertItem(e.NewStartingIndex, e.NewItems[0], isTransferred);
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}
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}
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break;
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case NotifyCollectionChangedAction.Reset:
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ClearItems();
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break;
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}
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}
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protected override DependencyObject GetContainerForItemOverride() => new TransferItem();
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protected override bool IsItemItsOwnContainerOverride(object item) => item is TransferItem;
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protected override DependencyObject GetContainerForItemOverride() => new TransferItem();
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private void SelectItems(object sender, ExecutedRoutedEventArgs e)
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{
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var list = _entryDic.Where(item => item.Value.OriginItem.IsSelected).ToList();
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list.Do(item => item.Value.StatusSwitch(true)).Do(item => SelectedItems.Add(item.Key));
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RaiseEvent(new SelectionChangedEventArgs(SelectionChangedEvent, new List<object>(), list));
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if (_selectedListBox == null)
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{
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return;
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}
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foreach (var item in SelectedItems)
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{
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if (ItemContainerGenerator.ContainerFromItem(item) is not TransferItem { IsTransferred: false } selectedItem)
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{
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continue;
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}
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selectedItem.IsTransferred = true;
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var transferItem = new TransferItem
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{
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Tag = item
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};
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if (ItemsSource != null)
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{
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transferItem.SetBinding(ContentControl.ContentProperty, new Binding(DisplayMemberPath) { Source = item });
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}
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else
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{
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transferItem.Content = IsItemItsOwnContainerOverride(item) ? ((TransferItem) item).Content : item;
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}
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_selectedListBox.Items.Add(transferItem);
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}
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OnTransferred(new RoutedEventArgs(TransferredEvent, this));
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}
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private void DeselectItems(object sender, ExecutedRoutedEventArgs e)
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{
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var list = _entryDic.Where(item => item.Value.SelectedItem.IsSelected).ToList();
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list.Do(item => item.Value.StatusSwitch(false)).Do(item => SelectedItems.Remove(item.Key));
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RaiseEvent(new SelectionChangedEventArgs(SelectionChangedEvent, list, new List<object>()));
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}
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protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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}
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protected override void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e)
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{
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}
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protected override void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e)
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{
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}
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protected override void Refresh()
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{
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if (_entryList.Count > 0)
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if (_selectedListBox == null)
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{
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_entryList.Select(item => item.OriginItem).Do(item => _itemsOrigin.Items.Add(item));
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_entryList.Select(item => item.SelectedItem).Do(item => _itemsSelected.Items.Add(item));
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return;
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}
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}
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private struct TransferEntry
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{
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public TransferItem OriginItem { get; set; }
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public TransferItem SelectedItem { get; set; }
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public void StatusSwitch(bool isTransferred)
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foreach (var transferItem in _selectedListBox.Items.OfType<TransferItem>().ToList())
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{
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if (isTransferred)
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if (!transferItem.IsSelected)
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{
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OriginItem.IsTransferred = true;
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SelectedItem.IsTransferred = true;
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OriginItem.IsSelected = false;
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continue;
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}
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else
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if (ItemContainerGenerator.ContainerFromItem(transferItem.Tag) is TransferItem selectedItem)
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{
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OriginItem.IsTransferred = false;
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SelectedItem.IsTransferred = false;
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SelectedItem.IsSelected = false;
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_selectedListBox.Items.Remove(transferItem);
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selectedItem.SetCurrentValue(TransferItem.IsTransferredProperty, ValueBoxes.FalseBox);
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selectedItem.SetCurrentValue(ListBoxItem.IsSelectedProperty, ValueBoxes.FalseBox);
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}
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}
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OnTransferred(new RoutedEventArgs(TransferredEvent, this));
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}
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}
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@@ -1,64 +0,0 @@
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using System.Collections.Specialized;
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using System.Windows;
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namespace HandyControl.Controls;
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public class TransferGroup : SimpleItemsControl
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{
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protected override void Refresh()
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{
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if (Items.Count > 0)
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{
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foreach (FrameworkElement item in Items)
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{
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item.Style = ItemContainerStyle;
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ItemsHost.Children.Add(item);
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}
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}
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}
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protected override void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e)
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{
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}
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protected override void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e)
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{
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}
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protected override DependencyObject GetContainerForItemOverride() => new TransferItem();
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protected override bool IsItemItsOwnContainerOverride(object item) => item is TransferItem;
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protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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if (ItemsHost == null) return;
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switch (e.Action)
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{
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case NotifyCollectionChangedAction.Add:
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if (e.NewItems != null)
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{
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if (e.NewItems[0] is FrameworkElement item)
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{
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item.Style = ItemContainerStyle;
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ItemsHost.Children.Insert(e.NewStartingIndex, item);
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}
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}
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break;
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case NotifyCollectionChangedAction.Remove:
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if (e.OldItems != null)
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{
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foreach (FrameworkElement item in e.OldItems)
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{
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ItemsHost.Children.Remove(item);
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}
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}
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break;
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case NotifyCollectionChangedAction.Reset:
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ItemsHost.Children.Clear();
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break;
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}
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}
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}
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@@ -1,9 +1,10 @@
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using System.Windows;
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using System.Windows.Controls;
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using HandyControl.Data;
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namespace HandyControl.Controls;
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public class TransferItem : SelectableItem
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public class TransferItem : ListBoxItem
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{
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public static readonly DependencyProperty IsTransferredProperty = DependencyProperty.Register(
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nameof(IsTransferred), typeof(bool), typeof(TransferItem), new PropertyMetadata(ValueBoxes.FalseBox));
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@@ -13,13 +14,4 @@ public class TransferItem : SelectableItem
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get => (bool) GetValue(IsTransferredProperty);
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set => SetValue(IsTransferredProperty, ValueBoxes.BooleanBox(value));
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}
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public static readonly DependencyProperty IsOriginProperty = DependencyProperty.Register(
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nameof(IsOrigin), typeof(bool), typeof(TransferItem), new PropertyMetadata(ValueBoxes.TrueBox));
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public bool IsOrigin
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{
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get => (bool) GetValue(IsOriginProperty);
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internal set => SetValue(IsOriginProperty, ValueBoxes.BooleanBox(value));
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}
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}
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Reference in new issue
Block a user