Add ButtonAttribute to display methods in editor properties panel

#1917

Source/Editor/Content/Items/VisualScriptItem.cs

@@ -112,6 +112,12 @@ namespace FlaxEditor.Content
                 throw new TargetException("Missing Visual Script asset.");
             _type.Asset.SetScriptInstanceParameterValue(_parameter.Name, (Object)obj, value);
         }
+
+        /// <inheritdoc />
+        public object Invoke(object obj, object[] parameters)
+        {
+            throw new NotSupportedException();
+        }
     }
 
     sealed class VisualScriptMethodInfo : IScriptMemberInfo
@@ -240,6 +246,14 @@ namespace FlaxEditor.Content
         {
             throw new NotSupportedException();
         }
+
+        /// <inheritdoc />
+        public object Invoke(object obj, object[] parameters)
+        {
+            if (!_type.Asset)
+                throw new TargetException("Missing Visual Script asset.");
+            return _type.Asset.InvokeMethod(_index, obj, parameters);
+        }
     }
 
     /// <summary>