Synchronize the Net40

Net40/HandyControl_Net40/Controls/Transfer/Transfer.cs

@@ -0,0 +1,223 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.Linq;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using HandyControl.Interactivity;
+using HandyControl.Tools.Extension;
+
+namespace HandyControl.Controls
+{
+    /// <summary>
+    ///     穿梭框
+    /// </summary>
+    [TemplatePart(Name = ElementItemsOrigin, Type = typeof(SimpleItemsControl))]
+    [TemplatePart(Name = ElementItemsSelected, Type = typeof(SimpleItemsControl))]
+    public class Transfer : SimpleItemsControl
+    {
+        private const string ElementItemsOrigin = "PART_ItemsOrigin";
+
+        private const string ElementItemsSelected = "PART_ItemsSelected";
+
+        private readonly Dictionary<object, TransferEntry> _entryDic = new Dictionary<object, TransferEntry>();
+
+        private SimpleItemsControl _itemsOrigin;
+
+        private SimpleItemsControl _itemsSelected;
+
+        private IEnumerable _itemsSourceInternal;
+
+        public static readonly RoutedEvent SelectionChangedEvent =
+            EventManager.RegisterRoutedEvent("SelectionChanged", RoutingStrategy.Bubble,
+                typeof(SelectionChangedEventHandler), typeof(Transfer));
+
+        public event SelectionChangedEventHandler SelectionChanged
+        {
+            add => AddHandler(SelectionChangedEvent, value);
+            remove => RemoveHandler(SelectionChangedEvent, value);
+        }
+
+        private static readonly DependencyPropertyKey SelectedItemsPropertyKey =
+            DependencyProperty.RegisterReadOnly(
+                "SelectedItems",
+                typeof(IList),
+                typeof(Transfer),
+                new FrameworkPropertyMetadata(default(IList)));
+
+        public static readonly DependencyProperty SelectedItemsProperty = SelectedItemsPropertyKey.DependencyProperty;
+
+        public IList SelectedItems
+        {
+            get => (IList)GetValue(SelectedItemsProperty);
+            set => SetValue(SelectedItemsProperty, value);
+        }
+
+        public Transfer()
+        {
+            CommandBindings.Add(new CommandBinding(ControlCommands.Selected, SelectItems));
+            CommandBindings.Add(new CommandBinding(ControlCommands.Cancel, DeselectItems));
+
+            SetValue(SelectedItemsPropertyKey, new ObservableCollection<object>());
+        }
+
+        public override void OnApplyTemplate()
+        {
+            _itemsOrigin?.ItemsHost.Children.Clear();
+            _itemsSelected?.ItemsHost.Children.Clear();
+
+            _itemsOrigin = GetTemplateChild(ElementItemsOrigin) as SimpleItemsControl;
+            _itemsSelected = GetTemplateChild(ElementItemsSelected) as SimpleItemsControl;
+
+            Refresh();
+        }
+
+        private void AddItem(object item)
+        {
+            var origin = new TransferItem
+            {
+                Content = item
+            };
+            var selected = new TransferItem
+            {
+                Content = item,
+                IsOrigin = false
+            };
+            var entry = new TransferEntry
+            {
+                OriginItem = origin,
+                SelectedItem = selected
+            };
+            _entryDic.Add(item, entry);
+            _itemsOrigin.Items.Add(origin);
+            _itemsSelected.Items.Add(selected);
+        }
+
+        private void RemoveItem(object item)
+        {
+            if (_entryDic.TryGetValue(item, out var entry))
+            {
+                _itemsOrigin.Items.Remove(entry.OriginItem);
+                _itemsSelected.Items.Remove(entry.SelectedItem);
+                _entryDic.Remove(item);
+            }
+        }
+
+        private void ClearItems()
+        {
+            _entryDic.Clear();
+            _itemsOrigin.Items.Clear();
+            _itemsSelected.Items.Clear();
+        }
+
+        protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
+        {
+            if (_itemsSourceInternal != null)
+            {
+                if (_itemsSourceInternal is INotifyCollectionChanged s)
+                {
+                    s.CollectionChanged -= InternalCollectionChanged;
+                }
+
+                ClearItems();
+            }
+            _itemsSourceInternal = newValue;
+            if (_itemsSourceInternal != null)
+            {
+                if (_itemsSourceInternal is INotifyCollectionChanged s)
+                {
+                    s.CollectionChanged += InternalCollectionChanged;
+                }
+                foreach (var item in _itemsSourceInternal)
+                {
+                    AddItem(item);
+                }
+            }
+        }
+
+        private void InternalCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            if (e.OldItems != null)
+            {
+                foreach (var item in e.OldItems)
+                {
+                    RemoveItem(item);
+                }
+            }
+            if (e.NewItems != null)
+            {
+                foreach (var item in e.NewItems)
+                {
+                    AddItem(item);
+                }
+            }
+        }
+
+        protected override DependencyObject GetContainerForItemOverride() => new TransferItem();
+
+        protected override bool IsItemItsOwnContainerOverride(object item) => item is TransferItem;
+
+        private void SelectItems(object sender, ExecutedRoutedEventArgs e)
+        {
+            var list = _entryDic.Where(item => item.Value.OriginItem.IsSelected).ToList();
+            list.Do(item => item.Value.StatusSwitch(true)).Do(item => SelectedItems.Add(item.Key));
+            RaiseEvent(new SelectionChangedEventArgs(SelectionChangedEvent, new List<object>(), list));
+        }
+
+        private void DeselectItems(object sender, ExecutedRoutedEventArgs e)
+        {
+            var list = _entryDic.Where(item => item.Value.SelectedItem.IsSelected).ToList();
+            list.Do(item => item.Value.StatusSwitch(false)).Do(item => SelectedItems.Remove(item.Key));
+            RaiseEvent(new SelectionChangedEventArgs(SelectionChangedEvent, list, new List<object>()));
+        }
+
+        protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+
+        }
+
+        protected override void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e)
+        {
+
+        }
+
+        protected override void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e)
+        {
+
+        }
+
+        protected override void Refresh()
+        {
+            if (_entryDic.Count > 0)
+            {
+                _entryDic.Select(item => item.Value.OriginItem).Do(item => _itemsOrigin.Items.Add(item));
+                _entryDic.Select(item => item.Value.SelectedItem).Do(item => _itemsSelected.Items.Add(item));
+            }
+        }
+
+        private struct TransferEntry
+        {
+            public TransferItem OriginItem { get; set; }
+
+            public TransferItem SelectedItem { get; set; }
+
+            public void StatusSwitch(bool isTransferred)
+            {
+                if (isTransferred)
+                {
+                    OriginItem.IsTransferred = true;
+                    SelectedItem.IsTransferred = true;
+                    OriginItem.IsSelected = false;
+                }
+                else
+                {
+                    OriginItem.IsTransferred = false;
+                    SelectedItem.IsTransferred = false;
+                    SelectedItem.IsSelected = false;
+                }
+            }
+        }
+    }
+}

Net40/HandyControl_Net40/Controls/Transfer/TransferGroup.cs

@@ -0,0 +1,54 @@
+using System.Collections.Specialized;
+using System.Windows;
+
+namespace HandyControl.Controls
+{
+    public class TransferGroup : SimpleItemsControl
+    {
+        protected override void Refresh()
+        {
+            if (Items.Count > 0)
+            {
+                foreach (FrameworkElement item in Items)
+                {
+                    item.Style = ItemContainerStyle;
+                    ItemsHost.Children.Add(item);
+                }
+            }
+        }
+
+        protected override void OnItemTemplateChanged(DependencyPropertyChangedEventArgs e)
+        {
+
+        }
+
+        protected override void OnItemContainerStyleChanged(DependencyPropertyChangedEventArgs e)
+        {
+
+        }
+
+        protected override DependencyObject GetContainerForItemOverride() => new TransferItem();
+
+        protected override bool IsItemItsOwnContainerOverride(object item) => item is TransferItem;
+
+        protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            if (ItemsHost == null) return;
+            if (e.OldItems != null)
+            {
+                foreach (FrameworkElement item in e.OldItems)
+                {
+                    ItemsHost.Children.Remove(item);
+                }
+            }
+            if (e.NewItems != null)
+            {
+                foreach (FrameworkElement item in e.NewItems)
+                {
+                    item.Style = ItemContainerStyle;
+                    ItemsHost.Children.Add(item);
+                }
+            }
+        }
+    }
+}

Net40/HandyControl_Net40/Controls/Transfer/TransferItem.cs

@@ -0,0 +1,26 @@
+using System.Windows;
+using HandyControl.Data;
+
+namespace HandyControl.Controls
+{
+    public class TransferItem : SelectableItem
+    {
+        public static readonly DependencyProperty IsTransferredProperty = DependencyProperty.Register(
+            "IsTransferred", typeof(bool), typeof(TransferItem), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        public bool IsTransferred
+        {
+            get => (bool)GetValue(IsTransferredProperty);
+            set => SetValue(IsTransferredProperty, value);
+        }
+
+        public static readonly DependencyProperty IsOriginProperty = DependencyProperty.Register(
+            "IsOrigin", typeof(bool), typeof(TransferItem), new PropertyMetadata(ValueBoxes.TrueBox));
+
+        public bool IsOrigin
+        {
+            get => (bool)GetValue(IsOriginProperty);
+            internal set => SetValue(IsOriginProperty, value);
+        }
+    }
+}