added more utilty packges

Packages/com.jovian.inspector/Editor/Attributes/OnValueChangedAttribute.cs

@@ -0,0 +1,38 @@
+using System.Reflection;
+using UnityEditor;
+using UnityEngine;
+
+namespace InspectorToolkit {
+    public class OnValueChangedAttribute : PropertyAttribute {
+        public readonly string methodName;
+        public OnValueChangedAttribute(string methodName) {
+            this.methodName = methodName;
+        }
+    }
+}
+
+#if UNITY_EDITOR
+namespace InspectorToolkit.Internal {
+
+    [CustomPropertyDrawer(typeof(OnValueChangedAttribute))]
+    public class OnValueChangedAttributeDrawer : PropertyDrawer {
+        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+            EditorGUI.BeginChangeCheck();
+            EditorGUI.PropertyField(position, property, label);
+            if(EditorGUI.EndChangeCheck()) {
+                property.serializedObject.ApplyModifiedProperties();
+                
+                Object target = property.serializedObject.targetObject;
+                string methodName = ((OnValueChangedAttribute)attribute).methodName;
+                MethodInfo methodInfo = target.GetType().GetMethod(methodName);
+                if (methodInfo != null) {
+                    methodInfo.Invoke(target, null);
+                }
+                else {
+                    Debug.LogError($"No method named '{methodName}' found on {target}", target);
+                }
+            }
+        }
+    }
+}
+#endif