From bc791ef7c88202592c374bb159f0f42d5a0ef6f3 Mon Sep 17 00:00:00 2001
From: punker76 <punkerat76@gmail.com>
Date: Thu, 3 Mar 2022 11:05:11 +0100
Subject: [PATCH] feat: add new interface to catch the dropped item

---
 .../DefaultDropHandler.cs                          |  5 +++++
 .../IDragItemCloneable.cs                          |  3 +++
 src/GongSolutions.WPF.DragDrop/IDragItemSource.cs  | 14 ++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100644 src/GongSolutions.WPF.DragDrop/IDragItemSource.cs

diff --git a/src/GongSolutions.WPF.DragDrop/DefaultDropHandler.cs b/src/GongSolutions.WPF.DragDrop/DefaultDropHandler.cs
index cf29bbae..4f8d544d 100644
--- a/src/GongSolutions.WPF.DragDrop/DefaultDropHandler.cs
+++ b/src/GongSolutions.WPF.DragDrop/DefaultDropHandler.cs
@@ -326,6 +326,11 @@ public virtual void Drop(IDropInfo dropInfo)
                     {
                         destinationList.Insert(insertIndex++, obj2Insert);
                     }
+
+                    if (obj2Insert is IDragItemSource dragItemSource)
+                    {
+                        dragItemSource.ItemDropped(dropInfo);
+                    }
                 }
 
                 SelectDroppedItems(dropInfo, objects2Insert);
diff --git a/src/GongSolutions.WPF.DragDrop/IDragItemCloneable.cs b/src/GongSolutions.WPF.DragDrop/IDragItemCloneable.cs
index b7c94645..8d207428 100644
--- a/src/GongSolutions.WPF.DragDrop/IDragItemCloneable.cs
+++ b/src/GongSolutions.WPF.DragDrop/IDragItemCloneable.cs
@@ -1,5 +1,8 @@
 namespace GongSolutions.Wpf.DragDrop
 {
+    /// <summary>
+    /// Supports cloning like the ICloneable interface, which creates a new instance of a class with the same value as an existing instance.
+    /// </summary>
     public interface IDragItemCloneable
     {
         /// <summary>
diff --git a/src/GongSolutions.WPF.DragDrop/IDragItemSource.cs b/src/GongSolutions.WPF.DragDrop/IDragItemSource.cs
new file mode 100644
index 00000000..fcfddb9f
--- /dev/null
+++ b/src/GongSolutions.WPF.DragDrop/IDragItemSource.cs
@@ -0,0 +1,14 @@
+namespace GongSolutions.Wpf.DragDrop
+{
+    /// <summary>
+    /// Supports methods for models which can be dropped.
+    /// </summary>
+    public interface IDragItemSource
+    {
+        /// <summary>
+        /// Indicates that the item is dropped on the destination list.
+        /// </summary>
+        /// <param name="dropInfo"></param>
+        void ItemDropped(IDropInfo dropInfo);
+    }
+}
\ No newline at end of file