From f45aa5471cd327145f04cc42494354cced89123f Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Wed, 22 Jul 2020 22:45:00 +0800
Subject: [PATCH] minor fix

---
 .../Controls/Transfer/TransferGroup.cs        | 37 ++++++++++++-------
 .../Tools/GifImageAnimator.cs                 |  1 +
 2 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/src/Shared/HandyControl_Shared/Controls/Transfer/TransferGroup.cs b/src/Shared/HandyControl_Shared/Controls/Transfer/TransferGroup.cs
index cc6a2478..4455d7d6 100644
--- a/src/Shared/HandyControl_Shared/Controls/Transfer/TransferGroup.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Transfer/TransferGroup.cs
@@ -34,20 +34,31 @@ namespace HandyControl.Controls
         protected override void OnItemsChanged(object sender, NotifyCollectionChangedEventArgs e)
         {
             if (ItemsHost == null) return;
-            if (e.OldItems != null)
+
+            switch (e.Action)
             {
-                foreach (FrameworkElement item in e.OldItems)
-                {
-                    ItemsHost.Children.Remove(item);
-                }
-            }
-            if (e.NewItems != null)
-            {
-                if (e.NewItems[0] is FrameworkElement item)
-                {
-                    item.Style = ItemContainerStyle;
-                    ItemsHost.Children.Insert(e.NewStartingIndex, item);
-                }
+                case NotifyCollectionChangedAction.Add:
+                    if (e.NewItems != null)
+                    {
+                        if (e.NewItems[0] is FrameworkElement item)
+                        {
+                            item.Style = ItemContainerStyle;
+                            ItemsHost.Children.Insert(e.NewStartingIndex, item);
+                        }
+                    }
+                    break;
+                case NotifyCollectionChangedAction.Remove:
+                    if (e.OldItems != null)
+                    {
+                        foreach (FrameworkElement item in e.OldItems)
+                        {
+                            ItemsHost.Children.Remove(item);
+                        }
+                    }
+                    break;
+                case NotifyCollectionChangedAction.Reset:
+                    ItemsHost.Children.Clear();
+                    break;
             }
         }
     }
diff --git a/src/Shared/HandyControl_Shared/Tools/GifImageAnimator.cs b/src/Shared/HandyControl_Shared/Tools/GifImageAnimator.cs
index 9f3a6671..f79c86aa 100644
--- a/src/Shared/HandyControl_Shared/Tools/GifImageAnimator.cs
+++ b/src/Shared/HandyControl_Shared/Tools/GifImageAnimator.cs
@@ -175,6 +175,7 @@ namespace HandyControl.Tools
 
                 if (!ImageInfoList.Any())
                 {
+                    AnimationThread?.Abort();
                     AnimationThread = null;
                 }
             }