Add project files.

Nodify/Connections/States/ConnectionState.cs

@@ -0,0 +1,11 @@
+namespace Nodify.Interactivity
+{
+    public static partial class ConnectionState
+    {
+        internal static void RegisterDefaultHandlers()
+        {
+            InputProcessor.Shared<BaseConnection>.RegisterHandlerFactory(elem => new Disconnect(elem));
+            InputProcessor.Shared<BaseConnection>.RegisterHandlerFactory(elem => new Split(elem));
+        }
+    }
+}

Nodify/Connections/States/Disconnect.cs

@@ -0,0 +1,41 @@
+using System.Windows.Input;
+
+namespace Nodify.Interactivity
+{
+    public static partial class ConnectionState
+    {
+        /// <summary>
+        /// Represents a state in which a connection can be disconnected from its connectors based on specific gestures.
+        /// </summary>
+        public class Disconnect : InputElementState<BaseConnection>
+        {
+            /// <summary>
+            /// Initializes a new instance of the <see cref="Disconnect"/> class.
+            /// </summary>
+            /// <param name="connection">The <see cref="BaseConnection"/> element associated with this state.</param>
+            public Disconnect(BaseConnection connection) : base(connection)
+            {
+            }
+
+            protected override void OnMouseDown(MouseButtonEventArgs e)
+            {
+                EditorGestures.ConnectionGestures gestures = EditorGestures.Mappings.Connection;
+                if (gestures.Disconnect.Matches(e.Source, e))
+                {
+                    Element.Focus();
+                    e.Handled = true;   // prevent interacting with the editor
+                }
+            }
+
+            protected override void OnMouseUp(MouseButtonEventArgs e)
+            {
+                EditorGestures.ConnectionGestures gestures = EditorGestures.Mappings.Connection;
+                if (gestures.Disconnect.Matches(e.Source, e))
+                {
+                    Element.Remove();
+                    e.Handled = true;   // prevent opening context menu
+                }
+            }
+        }
+    }
+}

Nodify/Connections/States/Split.cs

@@ -0,0 +1,33 @@
+using System.Windows.Input;
+
+namespace Nodify.Interactivity
+{
+    public static partial class ConnectionState
+    {
+        /// <summary>
+        /// Represents a state in which a connection can be split.
+        /// </summary>
+        public class Split : InputElementState<BaseConnection>
+        {
+            /// <summary>
+            /// Initializes a new instance of the <see cref="Split"/> class.
+            /// </summary>
+            /// <param name="connection">The <see cref="BaseConnection"/> element associated with this state.</param>
+            public Split(BaseConnection connection) : base(connection)
+            {
+            }
+
+            protected override void OnMouseDown(MouseButtonEventArgs e)
+            {
+                EditorGestures.ConnectionGestures gestures = EditorGestures.Mappings.Connection;
+                if (gestures.Split.Matches(e.Source, e))
+                {
+                    Element.Focus();
+                    Element.SplitAtLocation(e.GetPosition(Element));
+
+                    e.Handled = true;   // prevent interacting with the editor
+                }
+            }
+        }
+    }
+}