First commit

Editor/Views/BlackboardPropertyView.cs

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+using System;
+using System.Reflection;
+using UnityEditor;
+using UnityEditor.Experimental.GraphView;
+using UnityEditor.UIElements;
+using UnityEngine.UIElements;
+
+namespace Misaki.GraphView.Editor
+{
+    public class BlackboardPropertyView : BlackboardField, IInspectable
+    {
+        private readonly ExposedPropertyEditor _editor;
+
+        public Action<IInspectable> OnItemSelected { get; set; }
+        public string InspectorName => text;
+        
+        public BlackboardPropertyView(ExposedPropertyEditor editor)
+        {
+            _editor = editor;
+        }
+
+        public override void OnSelected()
+        {
+            base.OnSelected();
+            OnItemSelected?.Invoke(this);
+        }
+        
+        public override void OnUnselected()
+        {
+            base.OnUnselected();
+            OnItemSelected?.Invoke(null);
+        }
+        
+        public virtual EditorNodeView CreateNodeView()
+        {
+            return null;
+        }
+
+        public virtual VisualElement CreateInspector()
+        {
+            return _editor.CreateInspector();
+        }
+    }
+}